CN107884834A - Homologous more transient electromagnetic detecting methods - Google Patents
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- CN107884834A CN107884834A CN201710974287.1A CN201710974287A CN107884834A CN 107884834 A CN107884834 A CN 107884834A CN 201710974287 A CN201710974287 A CN 201710974287A CN 107884834 A CN107884834 A CN 107884834A
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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Abstract
Homologous more transient electromagnetic detecting methods.The present invention relates to homologous more detection methods, including：In the first predetermined transmitting multiple transmitting loops of location arrangements corresponding to tunnel to be detected located underground, the emission source as magnetic field；At the top plate, bottom plate and/or lateral wall in tunnel to be detected, reception device is respectively arranged along tunnel trend, reception device includes single or multiple receiving transducers, the electromagnetic signal received for collecting each receiving transducer；Underground medium is sensed by electromagnetic signal and produces induction field；Move towards for receiving transducer to be moved to the underface of each transmitting loop successively along tunnel, carry out sectoring reception；After receiving transducer is moved to last transmitting loop and measures, mobile transmitting loop to next transmitting position, and duplicate measurements；The feature that the intensity of the induction field received by analyzing each receiving transducer changes over time, therefrom extract the electrical property feature of the underground medium；According to the electrical property feature, the spatial distribution and bearing of trend of the underground medium are judged.
Description
Technical field
The invention belongs to coal face geology detecting technical field, is related to back, bottom plate, work under mine
Make inside face and heading end influences the architectonic homologous more transient electromagnetic detecting methods of aqueous water guide of safety in production.
Background technology
Coal face geology detecting has a variety of implementation methods, common are mine direct current method, mine transient electrical
Magnetic method, electromagnetic wave penetrating method, magnetic source ground-tunnel transient electromagnetic detecting method etc..
Mine direct current method is mainly used in roadway floor depth measurement and the water-bearing structure in front of meeting head on, and can solve layer thickness division
With rich water body delineation problem (i.e. DC detecting deep and forward probe), this method is mainly used in detecting two crossheadings inside working face
Between coal seam top, the rich water situation in the range of bottom plate certain depth, it is bad to the geological structure reaction inside working face coal seam.Separately
Outside, there is detection bulk effect in this method, constructs and is limited by tunnel condition, aqueous to working face inside coal seam and its top, bottom plate
The detection range of construction is limited (typically in 80m), and face width is frequently more than 150m, and its internal buried structure is difficult to
Detection.
Mine Transient Electromagnetic Method, tunnel can not be dug to Adjacent Working Face and implements lateral detection, floor undulation, top plate spy
Survey, digging laneway meet head on forward probe, determine that latent water-bearing structure is abnormal.Such as water-bearing fault, water producing fractures development belt, potential prominent
Aquaporin, aquifer water well, leak borehole space position etc..The technology have it is quick, convenient, sensitive to low-resistance water content,
The advantages that directionality is good, has a good application prospect in terms of mine geological hazards.But the technology there is a problem in that：Usually
The objective body of setting is located at detection front, it is not excluded that beyond detection interface, the particularly influence of rear medium；In the presence of detection
The shortcomings that (being generally no greater than 80m) in small distance, therefore total space Theory of Interpretation is up for perfect；Detect exceptions area ratio practically
Big more of matter anomalous body, means of interpretation needs to improve；Ore deposit silo launcher is influenceed by underworkings space, it is impossible to which it is proper to do
Product is larger, is that transmitting magnetic moment can not be sufficiently large, has had a strong impact on investigation depth and precision etc..
Electromagnetic wave penetrating method, belong to frequency electromagnetic waves exploration engineering, be that electromagnetic wave is inhaled using rock or ore
Receipts ability difference look for ore deposit and exploration-kind of mine geophysical exploration method.It is mainly used in detecting the geology in stope working surface of coal mines
Effect is good in terms of the little structures such as construction, karst collapse col umn, tomography inside detection operations face.The shortcomings that technology is：To building ring
Border requires higher, as that can not have the electric equipment for sending electromagnetic wave around working face, it is desirable to which cable run disconnects, it is impossible to powered；
The method is that different electrical geologic bodies are different to the absorbability of electromagnetic wave, the absorption of the geologic body of high conductivity to electromagnetic wave
It is very capable, if in the presence of having good conductor in the approach of radio propagation, electromagnetic wave is absorbed quickly, is received in receivers
The signal arrived is very weak, or can not receive and occur so-called " shade " at all.Sometimes the too wide electromagnetic wave attenuation of working face comparatively fast also can
Cause not receiving signal etc..
Magnetic source ground-tunnel transient electromagnetic detecting method is a kind of new underground transient electromagnetic method advanced detection technology,
Its principle is：Launched on ground using big loop line, underworkings observation induced field, according to the electric characteristic abnormality region decision of detection
Geology and hydrogeology are abnormal, reach the purpose of water-bursting predicting forecast before working face heading end.But at present, the specific reality of the technology
Now still suffer from following deficiency：It can not be detected for potential gushing water danger present in working face inside and top, bottom plate；To detection
When carrying out Geophysical Work in buried depth deeper objective body or deep mining, between receiving in ground launch and tunnel distance compared with
Far, field source signal intensity possibly can not meet the detection requirement of big depth.
The content of the invention
The present invention seeks to overcome weak point of the prior art, there is provided a kind of new ground-underground transient electromagnetic method
Detection method.This method uses two pairs of electric dipole source electromagnetic exploration device modes, and eelctric dipole emission source (A1B1, A2B2) is placed
In earth's surface, receiving transducer (Rx) is placed in underworkings.Electric dipole source is fixed in measurement process, is walked in tunnel along tunnel
Measured successively to arrangement survey line.Top plate, bottom plate, working face inside and heading end are calculated according to the regularity of distribution of electric field
The regularity of distribution of the apparent resistivity in front, thus detect its internal geological anomalous body aqueous with the presence or absence of water guide.Its advantage is：
Investigation depth is big, construction is simple efficiency high, by the small conduction class electromagnetic exploration method of artificial disturbance, the influence of topography.In addition, the hair
It is potential aqueous in front of the bright detection top plate suitable for 110 engineering methods, N00 engineering methods, bottom plate, coal-face inside and heading end
The particular locations such as tomography, high hydraulic pressure water guide water bursting disaster geological structure, are kept the safety in production with scientific guidance.
According to an embodiment of the invention, there is provided a kind of homologous more transient electromagnetic detecting methods, comprise the following steps：
Step S100：In the predetermined transmitting of first corresponding to tunnel to be detected located underground, location arrangements are multiple is transmitted back to
Line, the emission source as magnetic field；
Step S200：At the top plate, bottom plate and/or lateral wall in tunnel to be detected, reception dress is respectively arranged along tunnel trend
Put, the reception device includes single or multiple receiving transducers (Rx), the electromagnetism letter received for collecting each receiving transducer
Number；
Step S400：By providing step current to the coil of the transmitting loop, inductive electromagnetic signal is produced；
Step S500：Underground medium is sensed by the electromagnetic signal and produces induction field, and the underground medium includes
The earth or detection destination layer/body；
Step S600：Fixed transmission loop line, move towards receiving transducer being moved to each transmitting loop successively just along tunnel
Lower section, and change the reception orientation of receiving transducer, using the direction of the corresponding transmitting loop of face as symmetry axis, carry out sectoring
Receive, often move a receiving transducer and measure one group of signal data；
Step S700：After receiving transducer is moved to last transmitting loop and measures, mobile transmitting loop is extremely
Next predetermined transmitting position, and above step S400 to S600 is repeated, until mobile transmitting loop has moved through whole make a reservation for
Launch position, and measure finish untill；
Step S800：The spy that the intensity of the induction field received by analyzing each receiving transducer changes over time
Sign, therefrom extract the electrical property feature of the underground medium；
Step S900：According to the electrical property feature, the spatial distribution and bearing of trend of the underground medium are judged.
Beneficial effect：
1) transmitting field source is established in ground region corresponding to tunnel to be detected, the transmitting field source is launched using multiple magnetic sources
Wire-retracting device builds field, and stronger signal can be launched to underground, and the size of transmitting loop is determined by the maximum buried depth of detection objective body；
Contrasted with magnetic source ground-tunnel transient electromagnetic detecting method of prior art, the present invention is same using multiple big loop line magnetic sources
When build field, compared with a traditional loop line magnetic source builds field, its advantage be multiple Loop sources simultaneously build field increase transmitting letter
Number intensity, compacting interference, realize big depth between send-receive, high-resolution detection.
2) after artificial field source being established on ground, receiving transducer is arranged in underworkings to be detected, it is equidistantly mobile to receive
Probe, complete the detection operations of diverse location measuring point；With magnetic source ground-tunnel transient electromagnetic detecting method pair of prior art
Than for the spacing of receiving transducer of the present invention between 5m~30m, its advantage is can be according to the scale and detection accuracy of detection objective body
Adjust the spacing of receiving transducer.
3) according to the difference of detection target bearing, receiving transducer is arranged in the diverse location of underworkings to realize difference
The detection operations of orientation objective body.One or more receiving transducers can be arranged in top plate, bottom plate, lateral wall and the area in tunnel
The diverse locations such as face, to realize back, bottom plate, inside working face and in front of heading end around measuring point radius 120m~
The detection of the potential geological anomalous body of 200m scopes.With in magnetic source ground-tunnel transient electromagnetic detecting method of prior art
Receiving transducer be arranged in back central probe orientation along tunnel trend and compared for the forward probe in front of heading end, the hair
The advantages of bright is can to realize the comprehensive detection in tunnel by changing the orientation of receiving transducer.
4) invention is adapted to the Geophysical Work of the new coal-mining method such as N00 methods.In less tunnel or can not possess and build field
The underground coal mine of condition carries out the transient electromagnetic detecting work of ground launch-areal receiver-array.
In summary, the present invention is that a kind of investigation depth is big, high resolution, construction is simple, operating efficiency are high, anomalous reflection
Substantially, the homologous more transient electromagnetic detecting methods not limited by underworkings.
Brief description of the drawings
Fig. 1 is the signal for the Construction Arrangement for showing homologous more transient electromagnetic detecting methods according to an embodiment of the invention
Figure；
Fig. 2 is the schematic flow sheet for showing homologous more transient electromagnetic detecting methods according to an embodiment of the invention.
Embodiment
Below, it is described in further detail with reference to implementation of the accompanying drawing to technical scheme.
It will be appreciated by those of skill in the art that although the following description is related to many of embodiment for the present invention
Ins and outs, but be only for the example of the principle for illustrating the present invention and do not mean that any restrictions.The present invention can be applicable
Occasion outside different from ins and outs exemplified below, principle and spirit without departing from the present invention.
, may pair can be in description in this manual in addition, miscellaneous in order to avoid being limited to the description of this specification
The portion of techniques details obtained in prior art data has carried out the processing such as omission, simplification, accommodation, this technology for this area
It will be understood by for personnel, and this does not interfere with the open adequacy of this specification.
Fig. 1 is the schematic diagram for the Construction Arrangement for showing homologous more detection methods according to an embodiment of the invention.
As shown in figure 1, the working environment of this method is arranged as follows：
1) in ground region corresponding to tunnel to be detected (to the ground region of earth's surface direction projection, i.e. detecting tunnel just
Top) the multiple transmitting loops of arrangement (3 are shown in figure as an example, can actually there are other numbers, i.e. Tx1, Tx2 ... Txn,
n>0), as multiple magnetic field sources transmission signals, wherein, and transmitting loop is equally spaced along underworkings trend, according to waiting to visit
The destination layer of survey/body buried depth and scale, to determine the size of transmitting loop.
2) in the top plate, bottom plate or lateral wall in tunnel to be detected, moved towards along tunnel, arrange single or multiple receiving transducers
(Rx), the receiving transducer is connected to reception device, and reception device is controlled to receiving transducer, and collects each receiving transducer
Reception signal；
Described receiving transducer is arranged in the top plate, bottom plate or lateral wall in tunnel to be detected, can particular location according to detection mesh
The specific orientation for marking layer/body determines；
Wherein, the receiving transducer is arranged in the top plate, bottom plate or lateral wall in tunnel to be detected, and particular location can be according to detection
The specific orientation of destination layer/body determines.For example, the receiving transducer is equally spaced in underworkings to be detected, probe
Between 5m~30m, specific spacing can be adjusted spacing according to the scale and detection accuracy requirement of detection objective body.
By above-mentioned arrangement, step current is provided to the coil of transmitting loop using magnetic source emitter, produces sensing
Electromagnetic signal；Then, receiving transducer underground passage along roadway direction can sensing caused by point-to-point measurement underground medium it is secondary
；By studying variation characteristic of the inducted secondary field on room and time, so as to infer the spatial distribution of objective body with
Bearing of trend.
Fig. 2 is the schematic flow sheet of the homologous more detection methods of embodiments of the invention.
As shown in Fig. 2 according to an embodiment of the invention, homologous more transient electromagnetic detecting methods mainly include following step
Suddenly：
Step S100：Arrange multiple transmitting loops (for example, rectangular emanation line in ground region corresponding to tunnel to be detected
Frame, 3 are shown in figure as an example, can actually there are other numbers, i.e. Tx1, Tx2 ... Txn, n>0), the transmitting as magnetic field
Source, wherein, the size of the transmitting loop is determined according to destination layer to be detected/body buried depth and scale；
Step S200：At the top plate, bottom plate and/or lateral wall in tunnel to be detected, reception dress is respectively arranged along tunnel trend
Put, the reception device includes single or multiple receiving transducers (Rx), the electromagnetism letter received for collecting each receiving transducer
Number；
Step S300：The emission source and the reception device are entered into row clock (such as passing through quartz clock) calibration/synchronous；
Step S400：By providing step current to the coil of the transmitting loop, inductive electromagnetic signal is produced；
Step S500：Underground medium is sensed by the electromagnetic signal and produces induction field, and the underground medium includes
The earth or detection destination layer/body；
Step S600：In measurement process, transmitting loop (Tx1, Tx2, Tx3) is relatively fixed, is moved towards along tunnel, will be received
Probe (Rx) is moved to each transmitting loop (Tx1, Tx2, Tx3) underface successively, and changes receiving transducer (Rx) reception
Orientation, using the direction of the corresponding transmitting loop of face as symmetry axis, sectoring reception is carried out, often moves a receiving transducer
(Rx) one group of parameter, is measured；
Step S700：After receiving transducer (Rx) is moved to last transmitting loop and measures, movement is transmitted back to
Line (Tx1, Tx2, Tx3) repeats above step S400 to S600 to next predetermined transmitting position, until mobile transmitting loop
Untill (Tx1, Tx2, Tx3) has moved through whole predetermined transmitting positions, and measurement finishes；
Step S800：The intensity of the induction field received by analyzing each receiving transducer (Rx) changes over time
Feature, therefrom extract the electrical property feature of the underground medium, the electrical property feature includes resistivity；
Step S900：According to the electrical property feature, the spatial distribution and bearing of trend of the underground medium are judged；
For example, in step S900, the electrical information of acquisition is handled and analyzed, show that underground electrically changes rule
Rule, with reference to given data, explaining to whether there is in front of back, bottom plate, working face inside and heading end influences safety life
The geological structure of aqueous/water guide of production.
Specifically,, can during above-mentioned processing and analysis for example, the receiving transducer receives multiple electromagnetic signal
The data for choosing the front and rear different acquisition moment of same observation station are analyzed, and pass through the data to same sensing point at different moments
Comparative analysis, the characteristic feature of its different periods is analyzed, monitor the electrical property feature anomalous variation in front of tunnel in tunneling process
Situation, so as to carry out dynamic monitoring, effectively prevent the generation of gushing water.For example, within coal mines, if in coal seam or intending tunneling lane
There is water-bearing fault or aqueous crack in front of road, its electrical property feature shows and substantially reduced compared with surrounding country rock in resistivity, is in
Now obvious low-resistance is abnormal.
Finally, it will be appreciated by those of skill in the art that various modifications, change can be made to the above embodiment of the present invention
Type and replacement, it is each fallen within such as protection scope of the present invention defined in the appended claims.
Claims (9)
1. a kind of homologous more transient electromagnetic detecting methods, comprise the following steps：
Step S100：Make a reservation for the transmitting multiple transmitting loops of location arrangements in first corresponding to tunnel to be detected located underground,
Emission source as magnetic field；
Step S200：At the top plate, bottom plate and/or lateral wall in tunnel to be detected, reception device is respectively arranged along tunnel trend, institute
Stating reception device includes single or multiple receiving transducers (Rx), the electromagnetic signal received for collecting each receiving transducer；
Step S400：By providing step current to the coil of the transmitting loop, inductive electromagnetic signal is produced；
Step S500：Underground medium is sensed by the electromagnetic signal and produces induction field, and the underground medium includes the earth
Or detection destination layer/body；
Step S600：Fixed transmission loop line, move towards for receiving transducer to be moved to the underface of each transmitting loop successively along tunnel,
And change the reception orientation of receiving transducer, using the direction of the corresponding transmitting loop of face as symmetry axis, sectoring reception is carried out,
Often move a receiving transducer and measure one group of signal data；
Step S800：The feature that the intensity of the induction field received by analyzing each receiving transducer changes over time,
Therefrom extract the electrical property feature of the underground medium；
Step S900：According to the electrical property feature, the spatial distribution and bearing of trend of the underground medium are judged.
2. homologous more transient electromagnetic detecting methods according to claim 1, wherein, also include after step S600：
Step S700, after receiving transducer is moved to last transmitting loop and measures, mobile transmitting loop is to next
Predetermined transmitting position, and above step S400 to S600 is repeated, until mobile transmitting loop has moved through whole predetermined transmittings
Position, and measure finish untill.
3. homologous more transient electromagnetic detecting methods according to claim 1, wherein, also include after step S200：
Step S300, double eelctric dipole emission sources and the reception device are subjected to clock alignment/synchronous.
4. homologous more transient electromagnetic detecting methods according to claim 1, wherein, the electrical property feature includes resistance
Rate.
5. homologous more transient electromagnetic detecting methods according to claim 1, wherein, the transmitting loop includes 3 squares
Shape launches wire frame.
6. homologous more transient electromagnetic detecting methods according to claim 1, wherein, and move towards equidistant along underworkings
The transmitting loop is arranged, and the size of transmitting loop is determined according to destination layer to be detected/body buried depth and scale.
7. homologous more transient electromagnetic detecting methods according to claim 1, wherein, the receiving transducer is along lane to be detected
Road is equally spaced.
8. homologous more transient electromagnetic detecting methods according to claim 7, wherein, the spacing of the receiving transducer is 5
~30 meters, and can be adjusted according to the requirement of the scale and detection accuracy of destination layer/body to be detected.
9. homologous more transient electromagnetic detecting methods according to claim 1, wherein, in step S900, to acquisition
Electrical property feature is handled and analyzed, and draws the electrical changing rule in underground, with reference to given data, explains back, bottom plate, work
Make the geological structure of aqueous/water guide kept the safety in production inside face and in front of heading end with the presence or absence of influence.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108952674A (en) * | 2018-06-25 | 2018-12-07 | 长江地球物理探测（武汉）有限公司 | A kind of assay method and system of the engaging portion Tu Yan unfavorable geologic body detection |
| CN111006574A (en) * | 2019-11-15 | 2020-04-14 | 山东科技大学 | Equipment and method for measuring displacement of roadway wall part |
| CN112485833A (en) * | 2020-11-09 | 2021-03-12 | 江苏南京地质工程勘察院 | Urban tunnel abnormal body detection method based on loop line source ground hole transient electromagnetism |
| CN113671585A (en) * | 2021-08-18 | 2021-11-19 | 中国矿业大学 | Intelligent transient electromagnetic detection and real-time early warning method for excavation roadway |
| WO2022047846A1 (en) * | 2020-09-01 | 2022-03-10 | 北京探创资源科技有限公司 | Anomaly monitoring method and anomaly monitoring system for mine roof |
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| WO2022047846A1 (en) * | 2020-09-01 | 2022-03-10 | 北京探创资源科技有限公司 | Anomaly monitoring method and anomaly monitoring system for mine roof |
| CN112485833A (en) * | 2020-11-09 | 2021-03-12 | 江苏南京地质工程勘察院 | Urban tunnel abnormal body detection method based on loop line source ground hole transient electromagnetism |
| CN113671585A (en) * | 2021-08-18 | 2021-11-19 | 中国矿业大学 | Intelligent transient electromagnetic detection and real-time early warning method for excavation roadway |
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