CN111075507A - Method and device for determining stoping line of coal mine stoping working face - Google Patents
Method and device for determining stoping line of coal mine stoping working face Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 58
- 238000005065 mining Methods 0.000 claims abstract description 55
- 230000035939 shock Effects 0.000 claims description 20
- 238000012216 screening Methods 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The application discloses a method for determining a stope line of a stope face of a coal mine, relates to the technical field of coal mining, and can provide reliable basis for reasonably determining the stope line of the working face. The method comprises the following steps: configuring a preset number of micro-seismic sensors in the transportation gateway and the return air gateway so as to construct a micro-seismic monitoring network, and monitoring all vibration events in a working face range by using the micro-seismic monitoring network; obtaining vibration event information calculated by a microseismic monitoring network, wherein the vibration event information comprises vibration time, vibration position and vibration energy corresponding to each vibration event; calculating the minimum distance between each vibration event and the current working surface according to the vibration position; calculating the sum of the vibration energy in each preset distance interval, and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance; and determining the optimal stop mining line position by using a relation curve of the vibration energy and the distance. The method and the device are suitable for determining the position of the stoping line.
Description
Technical Field
The application relates to the technical field of coal mining, in particular to a method and a device for determining a stope line of a coal mining working face.
Background
The determination of the reasonable stoping line position of the stope face is always a difficult problem in the coal mine production process. If the stope line is too far from the roadway of the mining (tray) area, less coal is recovered, so that resource loss is caused, and normal mining continuation is possibly influenced. If the distance is too close, the later-stage roadway maintenance is difficult, and even coal mine accidents such as rock burst or roadway roof fall can occur, so that the safety production of the mine is seriously influenced. Therefore, the reasonable stoping line position of the working face is determined by taking the recovery of coal resources into consideration and the safe production of a mine into consideration, and an optimal binding point is found.
However, the current position of the stope is mainly determined according to the experience of related technicians of the mine, and an effective theory and a field monitoring basis are lacked.
Disclosure of Invention
The application provides a method and a device for determining a stope line of a coal mine stope face, which can determine a reasonable stope line position according to a distribution rule of energy of a vibration event monitored by a micro-seismic monitoring network in front of the face. On the premise of ensuring the safe production of the mine, the coal resources can be recovered as much as possible, and the economic and safety benefits are obvious.
According to one aspect of the application, a method for determining a stope line of a coal mine stope is provided, and the method comprises the following steps:
configuring a preset number of micro-seismic sensors in a transportation gateway and a return air gateway so as to construct a micro-seismic monitoring network, and monitoring all seismic events in a working face range by using the micro-seismic monitoring network;
obtaining vibration event information calculated by the microseismic monitoring network, wherein the vibration event information comprises vibration time, vibration position and vibration energy corresponding to each vibration event;
calculating the minimum distance between each vibration event and the current working surface according to the vibration position;
calculating the sum of vibration energy in each preset distance interval, and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance;
and determining the optimal stop mining line position by using the relation curve of the vibration energy and the distance.
Further, configuring a preset number of micro-seismic sensors in the transportation gateway and the return air gateway so as to construct a micro-seismic monitoring network, and monitoring all seismic events in a working face range by using the micro-seismic monitoring network specifically comprises:
at least 4 microseismic sensors are arranged in the transportation crossheading and the return air crossheading, and each crossheading is not less than 2 microseismic sensors.
Correspondingly, the calculating the minimum distance from each vibration event to the current working surface according to the vibration position specifically includes:
extracting plane coordinate points corresponding to all vibration events in the vibration event information;
calculating the normal distance from the plane coordinate point to the position of the working surface;
and determining the normal distance as the minimum distance between the vibration event and the current working surface.
Further, the calculating a sum of the vibration energy in each preset distance interval, and drawing a relationship curve between the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance specifically includes:
dividing the front of the working surface into a plurality of distance intervals at preset intervals;
counting microseismic accumulated energy of the shock events contained in each distance interval based on the minimum distance of each shock event;
and drawing a relation curve of the vibration energy and the distance by taking the distance from the distance interval to the current working surface as an abscissa and the microseismic accumulated energy as an ordinate.
Correspondingly, the step of counting microseismic accumulated energy of the shock events included in each distance interval based on the minimum distance of each shock event specifically includes:
if the minimum distance of the vibration event is determined to be greater than the distance lower limit in the distance interval and smaller than the distance upper limit in the distance interval, configuring an identifier of the distance interval for the vibration event;
and calculating the sum of the vibration energy of each vibration event configured with the same identifier, and determining the sum of the vibration energy as the microseismic accumulated energy in the distance interval.
Further, the determining an optimal stop mining line position by using the relation curve of the vibration energy and the distance specifically includes:
extracting all target vibration events in a preset time period according to the microseismic time of each vibration event recorded in the vibration event information;
calculating the sum of vibration energy corresponding to each target vibration event and the working surface advancing distance in the preset time period;
calculating a reference value by using the sum of the vibration energy and the advancing distance of the working surface;
and determining the optimal stop mining line position by taking the reference value as a judgment standard.
Correspondingly, the determining the optimal stop mining line position by taking the reference value as a judgment standard specifically comprises:
screening a target distance interval which meets a preset standard in the relation curve of the vibration energy and the distance, wherein the preset standard is that the micro-vibration accumulated energy in the target distance interval is smaller than the reference value; and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between the stoping line and the roadway of the mining (mining) area, and determining the position of the corresponding working face as the optimal stoping line position.
According to another aspect of the present application, there is provided a coal mine stope line determination apparatus, comprising:
the system comprises a configuration module, a control module and a monitoring module, wherein the configuration module is used for configuring a preset number of micro-seismic sensors in a transportation gateway and a return air gateway so as to construct a micro-seismic monitoring network and monitoring all seismic events in a working face range by using the micro-seismic monitoring network;
the acquiring module is used for acquiring vibration event information calculated by the microseismic monitoring network, and the vibration event information comprises vibration time, vibration position and vibration energy corresponding to each vibration event;
the calculation module is used for calculating the minimum distance between each vibration event and the current working surface according to the vibration position;
the drawing module is used for calculating the sum of vibration energy in each preset distance interval and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance;
and the determining module is used for determining the optimal stopping and mining line position by utilizing the relation curve of the vibration energy and the distance.
And further, a configuration module is specifically used for configuring at least 4 microseismic sensors in the transportation gateway and the return air gateway, and each gateway is not less than 2 microseismic sensors.
Correspondingly, the calculation module is specifically configured to extract a plane coordinate point corresponding to each vibration event in the vibration event information;
calculating the normal distance from the plane coordinate point to the position of the working surface;
and determining the normal distance as the minimum distance between the vibration event and the current working surface.
Further, the drawing module is specifically used for dividing the front of the working surface into a plurality of distance intervals at preset intervals;
counting microseismic accumulated energy of the shock events contained in each distance interval based on the minimum distance of each shock event;
and drawing a relation curve of the vibration energy and the distance by taking the distance from the distance interval to the current working surface as an abscissa and the microseismic accumulated energy as an ordinate.
Correspondingly, the drawing module is specifically configured to configure an identifier of the distance interval for the vibration event if it is determined that the minimum distance of the vibration event is greater than a distance lower limit in the distance interval and less than a distance upper limit in the distance interval;
and calculating the sum of the vibration energy of each vibration event configured with the same identifier, and determining the sum of the vibration energy as the microseismic accumulated energy in the distance interval.
Further, the determining module is specifically configured to extract all target vibration events within a preset time period according to the microseismic time of each vibration event recorded in the vibration event information;
calculating the sum of vibration energy corresponding to each target vibration event and the working surface advancing distance in the preset time period;
calculating a reference value by using the sum of the vibration energy and the advancing distance of the working surface;
and determining the optimal stop mining line position by taking the reference value as a judgment standard.
Correspondingly, the determining module is specifically configured to screen out a target distance interval meeting a preset standard in the relation curve between the vibration energy and the distance, where the preset standard is that the micro-vibration accumulated energy in the target distance interval is smaller than the reference value;
and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between the stoping line and the roadway of the mining (mining) area, and determining the position of the corresponding working face as the optimal stoping line position.
By means of the technical scheme, compared with the mode that the position of the stope line is determined according to the experience of related mine technicians at present, the method for determining the stope line of the coal mine stope face is characterized in that a certain number of microseismic detectors are arranged in the transportation gate way and the return air gate way, so that a microseismic monitoring network is constructed; monitoring all vibration events in a working face range by using a micro-vibration monitoring network; calculating the time, the position and the energy of each vibration event; calculating the minimum distance between each vibration event and the current working surface according to the position of the vibration event; dividing the front of the working surface into a plurality of distance intervals at preset intervals, and calculating the energy sum of all vibration events occurring in the distance intervals; drawing a relation curve of the micro-vibration energy and the distance, and determining the optimal stop mining line position by using the relation curve of the micro-vibration energy and the distance. The method realizes the determination of the reasonable mining stop line position, can recover coal resources as much as possible on the premise of ensuring the safe production of a mine, and can give consideration to economic and safety benefits.
The above description is only an outline of the technical solution of the present application, and the present application can be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below so that the above and other objects, features, and advantages of the present application can be more clearly understood.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application to the disclosed embodiment. In the drawings:
fig. 1 is a schematic flow chart illustrating a method for determining a stope line of a coal mining face according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating another method for determining a stope line of a coal mine stope according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a coal mine stope roadway layout provided in an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a distance between a vibration event and a current working face in coal mine recovery according to an embodiment of the application;
FIG. 5 is a schematic diagram illustrating a method for determining a stopping position according to a shock energy-distance relationship curve according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram illustrating a device for determining a stope line of a coal mine stope according to an embodiment of the present application;
fig. 7 shows a schematic structural diagram of another coal mine stope line determining device provided by the embodiment of the application.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment provides a method for determining a stope line of a coal mine stope, as shown in fig. 1, the method includes:
101. and arranging a preset number of micro-seismic sensors in the transportation gateway and the return air gateway so as to construct a micro-seismic monitoring network, and monitoring all vibration events in the range of the working surface by using the micro-seismic monitoring network.
The microseismic sensor is a device for receiving and transmitting shock waves, and in a specific application scene, the microseismic sensor needs to move forwards regularly along with the propulsion of a working surface; after the configuration of the micro-seismic sensor is completed, a micro-seismic monitoring network can be constructed, wherein the micro-seismic monitoring network is a system which can realize the positioning and energy calculation of the vibration event in a specific area and can store the vibration record.
102. And acquiring the vibration event information calculated by the microseismic monitoring network.
The vibration event information may include vibration time, vibration position, vibration energy, and the like corresponding to each vibration event.
103. And calculating the minimum distance between each vibration event and the current working surface according to the vibration position.
In a specific application scenario, the minimum distance from the vibration event to the working surface may refer to a normal distance from a plane coordinate of the vibration event to a current working surface position.
104. And calculating the sum of the vibration energy in each preset distance interval, and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance.
For the embodiment, in a specific application scenario, the purpose of creating the relation curve between the vibration energy and the distance is to facilitate intuitively reflecting the distribution rule of the vibration energy, so as to determine a more accurate stopping line position according to the distribution rule of the vibration energy.
105. And determining the optimal stop mining line position by using a relation curve of the vibration energy and the distance.
Compared with the mode of determining the position of the stope line according to the experience of related mine technicians at present, the method for determining the stope line of the coal mine stope face has the advantages that a certain number of microseismic detectors are arranged in the transportation gateway and the return air gateway in advance so as to construct a microseismic monitoring network; monitoring all vibration events in a working face range by using a micro-vibration monitoring network; calculating the time, the position and the energy of each vibration event; calculating the minimum distance between each vibration event and the current working surface according to the position of the vibration event; dividing the front of the working surface into a plurality of distance intervals at preset intervals, and calculating the energy sum of all vibration events occurring in the distance intervals; drawing a relation curve of the micro-vibration energy and the distance, and determining the optimal stop mining line position by using the relation curve of the micro-vibration energy and the distance. The method realizes the determination of the reasonable mining stop line position, can recover coal resources as much as possible on the premise of ensuring the safe production of a mine, and can give consideration to economic and safety benefits.
Further, as a refinement and an extension of the specific implementation of the foregoing embodiment, in order to illustrate the specific implementation process of the foregoing embodiment, this embodiment provides another method for determining a stope line of a large coal mine stope, as shown in fig. 2, the method includes:
201. and arranging a preset number of micro-seismic sensors in the transportation gateway and the return air gateway so as to construct a micro-seismic monitoring network, and monitoring all vibration events in the range of the working surface by using the micro-seismic monitoring network.
For the embodiment, in a specific application scenario, at least 4 microseismic sensors need to be configured in the transportation gateway and the return air gateway, and not less than 2 microseismic sensors are arranged in each gateway.
The transportation gateway and the return air gateway refer to roadways for transportation and return air during working face mining, the transportation roadway is a lower roadway, the return air roadway is an upper roadway, and the roadway which connects the transportation roadway and the return air roadway and is used for arranging coal mining machinery is a cut hole. As shown in fig. 3, the preparation face is a face being prepared for mining, and the face is an area surrounded by a transportation gate, a return air gate, a cutting hole, and a stope line, which is used for mining of coal resources. The upper and lower parallel tunnels are respectively a return air gateway and a transportation gateway, the tunnel between the left connecting two gateways is a cutting hole, and coal is mined rightwards from the cutting hole position of the working face. The air return and transportation downhill on the right side of the working face are both mining (plate) area roadways. In order to monitor the vibration event occurring during the recovery of the working face, 5 microseismic sensors are arranged near the working face, and the sensors move forward at proper time according to the propulsion of the working face.
202. And acquiring the vibration event information calculated by the microseismic monitoring network.
In a specific application scenario, after the configuration of the microseismic sensors is completed, a microseismic monitoring network can be constructed by each microseismic sensor, as shown in fig. 3, after a working face vibrates once, each microseismic sensor can automatically monitor a vibration waveform curve, and the time, three-dimensional position coordinates and energy generated by vibration of the microseismic event can be determined by analyzing the vibration waveform curves monitored by at least 4 microseismic sensors.
203. And extracting plane coordinate points corresponding to each vibration event in the vibration event information.
For this embodiment, in a specific application scenario, the three-dimensional position coordinates corresponding to each microseismic event may be projected onto a plane map, and a plane coordinate point may be further obtained.
204. And calculating the normal distance from the plane coordinate point to the position of the working surface.
For this embodiment, the normal distance of the microseismic coordinates perpendicular to the current working surface position can be calculated, as shown in fig. 4, after the microseismic event is determined, the perpendicular distance L of the microseismic event from the working surface needs to be calculated.
205. The normal distance is determined as the minimum distance of the shock event from the current working surface.
For this embodiment, in a specific application scenario, the minimum distance between each vibration event and the current working surface needs to be determined, so as to accurately analyze the vibration event, and further construct a relationship curve between vibration energy and distance.
206. The front of the working surface is divided into a plurality of distance intervals at preset intervals.
For this embodiment, the size of the predetermined interval may be set according to the actual application scenario, for example, the preset distance may be set to 1 meter, that is, the front of the working surface is divided into several sections at intervals of 1 meter.
207. And counting microseismic accumulated energy of the shock events contained in each distance interval based on the minimum distance of each shock event.
For this embodiment, in a specific application scenario, the step 207 of the embodiment may specifically include: if the minimum distance of the vibration event is determined to be greater than the lower distance limit in the distance interval and less than the upper distance limit in the distance interval, configuring an identifier of the distance interval for the vibration event; and calculating the sum of the vibration energy of each vibration event configured with the same identifier, and determining the sum of the vibration energy as the microseismic accumulated energy in the distance interval.
The microseismic accumulated energy is a numerical value obtained by determining which interval each event is located in according to the relative distance between each microseismic event and the working surface and adding the energy of the microseismic events occurring in each interval. For example, based on the embodiment in the embodiment step 206, the preset distance is set to 1 meter, that is, the front of the working surface is divided into several distance intervals according to the distance of 1 meter, after monitoring for a period of time, the accumulated energy of the microseismic events within the range of each meter in front of the working surface is counted, for example, 10 microseismic events are totally in the interval of 11 meters to 12 meters in front of the working surface, and the total released energy is 5 × 104J, which indicates that the accumulated energy of the microseismic events in the interval of 11 meters to 12 meters in front of the working surface is 5 × 104J.
208. And drawing a relation curve of the vibration energy and the distance by taking the distance abscissa from the distance interval to the current working surface and the microseismic accumulated energy as the ordinate.
For example, as shown in fig. 5, if the preset interval is 1 meter, the relationship between the vibration energy and the distance may be plotted by using the distance from each distance interval to the current working surface, i.e., 1,2,3,4 …, as the abscissa and the microseismic accumulated energy corresponding to each distance interval as the ordinate.
209. And extracting all target vibration events in a preset time period according to the microseismic time of each vibration event recorded in the vibration event information.
The preset time period can be set according to the actual application scene, and the longer the preset time period is, the more accurate the screened target vibration event is.
210. And calculating the sum of the vibration energy corresponding to each target vibration event and the working surface advancing distance in a preset time period.
In a specific application scenario, after all target vibration events occurring within a preset time period are determined, the energies of the target vibration events need to be added, and the distance that the working face advances during the time period is determined, so that a reference value is calculated by using the accumulated energy and the advancing distance.
211. And calculating a reference value by using the sum of the vibration energy and the advancing distance of the working surface.
For this embodiment, the reference value may be calculated by summing the energies of all microseismic events within a preset time period and dividing by the distance that the working surface advances within that time period.
212. And determining the optimal stop mining line position by taking the reference value as a judgment standard.
For the present embodiment, in a specific application scenario, the embodiment step 212 may specifically include: screening target distance intervals meeting preset standards in a relation curve of the vibration energy and the distance, wherein the preset standards are that the micro-vibration accumulated energy in the target distance intervals is smaller than a reference value; and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between the stoping line and the roadway of the mining (disc) area, wherein the corresponding working face position is the optimal stoping line position.
Correspondingly, as shown in fig. 3 or fig. 4, if the microseismic accumulated energy in each distance interval in front of the current working face is less than the reference value, the distance l between the current working face and the downdraft mountain is determined to be the optimal distance between the stoping line and the roadway of the mining (disc) area, wherein the roadway of the mining (disc) area is the roadway serving one mining (disc) area; the mining (mining) area is an independent mining operation area which is developed in a certain stage and is provided with a complete ventilation and transportation system, wherein the mining (mining) area is divided into a plurality of mining units according to design, and one mining (mining) area generally comprises a plurality of stope faces.
By the method for determining the stoping line of the coal mine stoping working face, a microseismic monitoring network can be constructed by configuring a certain number of microseismic detectors in the transportation gateway and the return air gateway; monitoring all vibration events in a working face range by using a micro-vibration monitoring network; calculating the time, the position and the energy of each vibration event; calculating the minimum distance between each vibration event and the current working surface according to the position of the vibration event; dividing the front of the working surface into a plurality of distance intervals at preset intervals, and calculating the energy sum of all vibration events occurring in the distance intervals; drawing a relation curve of the micro-vibration energy and the distance, and determining the optimal stop mining line position by using the relation curve of the micro-vibration energy and the distance. The method realizes the determination of the reasonable mining stop line position, can recover coal resources as much as possible on the premise of ensuring the safe production of a mine, and can give consideration to economic and safety benefits.
Further, as a concrete embodiment of the method shown in fig. 1 and fig. 2, an embodiment of the present application provides a device for determining a stope line of a coal mining working face, as shown in fig. 6, the device includes: configuration module 31, receiving module 32, calculating module 33, drawing module 34, and determining module 35.
The configuration module 31 can be used for configuring a preset number of micro-seismic sensors in the transportation gateway and the return air gateway so as to construct a micro-seismic monitoring network and monitor all seismic events in a working face range by using the micro-seismic monitoring network;
the acquisition module 32 is configured to acquire vibration event information calculated by the microseismic monitoring network, where the vibration event information includes vibration time, vibration position, and vibration energy corresponding to each vibration event;
the calculation module 33 is configured to calculate a minimum distance between each vibration event and the current working surface according to the vibration position;
the drawing module 34 is used for calculating the sum of the vibration energy in each preset distance interval and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance;
and the determining module 35 is used for determining the optimal stop mining line position by utilizing the relation curve of the vibration energy and the distance.
In a specific application scenario, in order to construct a microseismic monitoring network, all vibration events within a working range are monitored by using the microseismic monitoring network, and the configuration module 31 is specifically configured to configure at least 4 microseismic sensors in a transportation gateway and a return air gateway, and not less than 2 microseismic sensors in each gateway.
Accordingly, in order to calculate the minimum distance from the current working surface to each vibration event according to the position information of each vibration event in the vibration event information, as shown in fig. 6, the calculating module 33 includes: an extraction unit 331, a calculation unit 332, a determination unit 333.
An extracting unit 331 configured to extract a planar coordinate point corresponding to each vibration event in the vibration event information;
a calculating unit 332, configured to calculate a normal distance from the plane coordinate point to the working surface position;
a determining unit 333, configured to determine the normal distance as a minimum distance of the shock event from the current working surface.
In a specific application scenario, in order to draw a relationship curve between vibration energy and distance, as shown in fig. 6, the drawing module 34 includes: a dividing unit 341, a counting unit 342, and a drawing unit 343.
A dividing unit 341 configured to divide the front of the working surface into a plurality of distance sections at preset intervals;
the counting unit 342 is configured to count microseismic accumulated energy of the shock events included in each distance interval based on the minimum distance of each shock event;
the drawing unit 343 is configured to draw a relationship curve between the vibration energy and the distance by using the distance from the distance interval to the current working surface as an abscissa and the microseismic accumulated energy as an ordinate.
Correspondingly, in order to count the microseismic accumulated energy of the shock events included in each distance interval based on the minimum distance of each shock event, the counting unit 342 is specifically configured to configure a distance interval identifier for the shock event if it is determined that the minimum distance of the shock event is greater than the distance lower limit and less than the distance upper limit in the distance interval; and calculating the sum of the vibration energy of each vibration event configured with the same identifier, and determining the sum of the vibration energy as the microseismic accumulated energy in the distance interval.
In a specific application scenario, in order to determine an optimal stopping line position by using a relation curve of vibration energy and distance, as shown in fig. 6, the determining module 35 includes: an extraction unit 351, a calculation unit 352, and a determination unit 353.
The extracting unit 351 is used for extracting all target vibration events in a preset time period according to the microseismic time of each vibration event recorded in the vibration event information;
a calculating unit 352, configured to calculate a sum of vibration energies corresponding to each target vibration event and a working surface advancing distance within a preset time period;
the calculating unit 352 is further configured to calculate a reference value by using the sum of the vibration energies and the working plane advancing distance;
and the determining unit 353 is used for determining the optimal stopping line position by taking the reference value as a judgment standard.
Correspondingly, the determining unit 353 is specifically configured to screen out a target distance interval meeting a preset standard in a relation curve between the vibration energy and the distance, where the preset standard is that the microseismic accumulated energy in the target distance interval is smaller than a reference value; and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between the stoping line and the roadway of the mining (mining) area, and determining the position of the corresponding working face as the optimal stoping line position.
It should be noted that other corresponding descriptions of the functional units related to the determining device for a stope line of a coal mine stope provided in this embodiment may refer to the corresponding descriptions in fig. 1 to fig. 2, and are not described herein again.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and can also be implemented by hardware. By applying the technical scheme, compared with the prior art, the micro-seismic detector system has the advantages that a micro-seismic monitoring network can be constructed by configuring a certain number of micro-seismic detectors in the transportation gateway and the return air gateway; monitoring all vibration events in a working face range by using a micro-vibration monitoring network; calculating the time, the position and the energy of each vibration event; calculating the minimum distance between each vibration event and the current working surface according to the position of the vibration event; dividing the front of the working surface into a plurality of distance intervals at preset intervals, and calculating the energy sum of all vibration events occurring in the distance intervals; drawing a relation curve of the micro-vibration energy and the distance, and determining the optimal stop mining line position by using the relation curve of the micro-vibration energy and the distance. The method realizes the determination of the reasonable mining stop line position, can recover coal resources as much as possible on the premise of ensuring the safe production of a mine, and can give consideration to economic and safety benefits.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above application serial numbers are for description purposes only and do not represent the superiority or inferiority of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (10)
1. A method for determining a stope line of a stope face of a coal mine is characterized by comprising the following steps:
configuring a preset number of micro-seismic sensors in a transportation gateway and a return air gateway so as to construct a micro-seismic monitoring network, and monitoring all seismic events in a working face range by using the micro-seismic monitoring network;
obtaining vibration event information calculated by the microseismic monitoring network, wherein the vibration event information comprises vibration time, vibration position and vibration energy corresponding to each vibration event;
calculating the minimum distance between each vibration event and the current working surface according to the vibration position;
calculating the sum of vibration energy in each preset distance interval, and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance;
and determining the optimal stop mining line position by using the relation curve of the vibration energy and the distance.
2. The method as claimed in claim 1, wherein said configuring a predetermined number of microseismic sensors in said transport and return air chutes to construct a microseismic monitoring network for monitoring all seismic events within a working surface area comprises:
at least 4 microseismic sensors are arranged in the transportation crossheading and the return air crossheading, and each crossheading is not less than 2 microseismic sensors.
3. The method according to claim 1, wherein said calculating a minimum distance of each of said vibration events from a current working surface based on said vibration location comprises:
extracting plane coordinate points corresponding to all vibration events in the vibration event information;
calculating the normal distance from the plane coordinate point to the position of the working surface;
and determining the normal distance as the minimum distance between the vibration event and the current working surface.
4. The method as claimed in claim 3, wherein the step of calculating the sum of the vibration energy in each preset distance interval and using the sum of the vibration energy and the corresponding minimum distance to plot the relationship between the vibration energy and the distance comprises:
dividing the front of the working surface into a plurality of distance intervals at preset intervals;
counting microseismic accumulated energy of the shock events contained in each distance interval based on the minimum distance of each shock event;
and drawing a relation curve of the vibration energy and the distance by taking the distance from the distance interval to the current working surface as an abscissa and the microseismic accumulated energy as an ordinate.
5. The method of claim 4, wherein the step of counting microseismic cumulative energy of the seismic events contained in each distance interval based on the minimum distance of each seismic event comprises:
if the minimum distance of the vibration event is determined to be greater than the distance lower limit in the distance interval and smaller than the distance upper limit in the distance interval, configuring an identifier of the distance interval for the vibration event;
and calculating the sum of the vibration energy of each vibration event configured with the same identifier, and determining the sum of the vibration energy as the microseismic accumulated energy in the distance interval.
6. The method of claim 5, wherein determining an optimal stopping line position using the vibration energy versus distance curve comprises:
extracting all target vibration events in a preset time period according to the microseismic time of each vibration event recorded in the vibration event information;
calculating the sum of vibration energy corresponding to each target vibration event and the working surface advancing distance in the preset time period;
calculating a reference value by using the sum of the vibration energy and the advancing distance of the working surface;
and determining the optimal stop mining line position by taking the reference value as a judgment standard.
7. The method according to claim 6, wherein the determining an optimal stopping line position by using the reference value as a decision criterion specifically comprises:
screening a target distance interval which meets a preset standard in the relation curve of the vibration energy and the distance, wherein the preset standard is that the micro-vibration accumulated energy in the target distance interval is smaller than the reference value;
and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between the stoping line and the roadway of the mining (mining) area, and determining the position of the corresponding working face as the optimal stoping line position.
8. A coal mine stope line determining device is characterized by comprising:
the system comprises a configuration module, a control module and a monitoring module, wherein the configuration module is used for configuring a preset number of micro-seismic sensors in a transportation gateway and a return air gateway so as to construct a micro-seismic monitoring network and monitoring all seismic events in a working face range by using the micro-seismic monitoring network;
the acquiring module is used for acquiring vibration event information calculated by the microseismic monitoring network, and the vibration event information comprises vibration time, vibration position and vibration energy corresponding to each vibration event;
the calculation module is used for calculating the minimum distance between each vibration event and the current working surface according to the vibration position;
the drawing module is used for calculating the sum of vibration energy in each preset distance interval and drawing a relation curve of the vibration energy and the distance by using the sum of the vibration energy and the corresponding minimum distance;
and the determining module is used for determining the optimal stopping and mining line position by utilizing the relation curve of the vibration energy and the distance.
9. The apparatus according to claim 8, wherein the determining module is specifically configured to extract all target vibration events within a preset time period according to the microseismic time of each vibration event recorded in the vibration event information; calculating the sum of vibration energy corresponding to each target vibration event and the working surface advancing distance in the preset time period; calculating a reference value by using the sum of the vibration energy and the advancing distance of the working surface; and determining the optimal stop mining line position by taking the reference value as a judgment standard.
10. The apparatus according to claim 9, wherein the determining module is specifically configured to screen out a target distance interval that meets a preset criterion in the relationship curve between the vibration energy and the distance, where the preset criterion is that the accumulated microseismic energy in the target distance interval is smaller than the reference value; and determining the distance between the lower limit in the target distance interval and the current working face as the optimal distance between a stoping line and a roadway of a mining (disc) area, wherein the corresponding working face position is the optimal stoping line position.
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