CN106437799B - A method of being used for the caving of face end goaf - Google Patents
A method of being used for the caving of face end goaf Download PDFInfo
- Publication number
- CN106437799B CN106437799B CN201610938702.3A CN201610938702A CN106437799B CN 106437799 B CN106437799 B CN 106437799B CN 201610938702 A CN201610938702 A CN 201610938702A CN 106437799 B CN106437799 B CN 106437799B
- Authority
- CN
- China
- Prior art keywords
- caving
- goaf
- top plate
- hollow grouting
- grouting anchor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 34
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000011440 grout Substances 0.000 claims abstract description 15
- 238000007569 slipcasting Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 14
- 230000003245 working effect Effects 0.000 claims abstract description 14
- 230000005641 tunneling Effects 0.000 claims abstract description 5
- 208000002925 dental caries Diseases 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of method for the caving of face end goaf, i.e., the expandable chemical grout of injected slurry volume into top plate belongs to coal mining field to which breaking roof rock mass carries out caving.It is characterised in that it includes step is 1.：When tunneling stope drift active workings, which carries out supporting using hollow grouting anchor；Step is 2.：The hollow grouting anchor is connect with Grouting Pipe；Step is 3.：Working face is pushed ahead, after the outstanding dew certain length of the rear goaf top plate of the face end, by closing on one lateral working face direction of goaf, the expandable chemical grout of the volume is implanted sequentially to the hollow grouting anchor positioned at the goaf, the hollow grouting anchor in front of working face is connected with the Grouting Pipe after caving to be done, waits for next slip casting caving.This method caving effect is good, at low cost.
Description
Technical field
The present invention relates to a kind of methods of goaf caving more particularly to a kind of for the caving of face end goaf
Method.
Background technology
During coal production, as working face is pushed ahead, goaf top plate is periodically broken at " O-X ".Work
Tip position goaf top plate outstanding product of showing up in face is excessive, easily causes face upper corner angle gas and gathers, pole is brought to shaft production
Big security risk.
It is existing in the related technology, usually in progress of coal mining, the top plate drilling first to face end position,
Then it loads explosive blasting in drilling, or hydraulic pressure system is carried out to top plate to drilling note high pressure water and is split, or directly inject into drilling
Expansion cracking agent damages top plate.Because goaf forbids personnel to enter, so drilling caving work can only be close to work
Face tip position carries out, if the outstanding product of showing up of top plate is larger, it is difficult to carry out caving work to the top plate of the outstanding dew of goaf higher depth.
Invention content
The present invention is directed to solve one of above-mentioned technical problem at least to a certain extent.
For this purpose, the present invention proposes that a kind of method for the caving of face end goaf, this method utilize hollow slip casting
It is crushed caving in the method for the expandable chemical grout of anchor pole injected slurry volume into roof rock mass, is compared compared with original technology, no
It need to drill in caving and simplify caving process, reduce caving cost, while can also be carried out to the top plate of goaf higher depth
Caving works.
According to a kind of method for the caving of face end goaf of the invention, into top plate, injected slurry volume is expandable
Chemical grout, to which breaking roof rock mass carries out caving, which is characterized in that 1. including step：When tunneling stope drift active workings, the back production
Back carries out supporting using hollow grouting anchor；Step is 2.：The hollow grouting anchor is connect with Grouting Pipe；Step
③：Working face is pushed ahead, after the outstanding dew certain length of rear goaf top plate of the face end, by closing on goaf one
Lateral working face direction, the expandable chemistry of the volume is implanted sequentially to the hollow grouting anchor positioned at the goaf
Slurries.The chemical grout expands in roof rock mass, has certain scope of freedom since the top plate of outstanding dew closes on goaf side,
Then roof rock mass is caving by the pressure breaking that chemical grout expansion generates, later by the hollow note in front of working face
Slurry anchor pole is connected with the Grouting Pipe, waits for next slip casting caving.
Stope drift active workings top plate uses the hollow grouting anchor supporting, and the hollow grouting anchor is directly as caving
Grouted anchor bar need not again individually drill to top plate, keep caving process more simple, cost reduction.The hollow slip casting
Anchor pole is distributed on the stope drift active workings top plate in working face rear goaf so that range of grouting is wider, on working face
The top plate caving effect of corner is more preferable.
In addition, a kind of method for the caving of face end goaf according to the ... of the embodiment of the present invention, also has as follows
Additional technical characteristic：
A kind of method of goaf caving according to an embodiment of the invention, the step 2. in use it is described in
Empty grouted anchor bar is two cavate anchor poles；The expandable chemical grout of volume is made of two kinds of different slurries, it is described two not
Volume expansion does not occur under separated position with slurries, and generating body product expands under admixture；Described two difference slurries
Roof rock mass is injected by the different cavitys of the hollow grouting anchor respectively, and is expanded after being mixed in roof rock mass.
Description of the drawings
Fig. 1 is the floor map before the working face caving of one embodiment of the invention.
Fig. 2 is the diagrammatic cross-section before the working face caving of one embodiment of the invention.
Fig. 3 is the hollow bolt structure chart of one embodiment of the invention.
Fig. 4 is the floor map after the working face caving of one embodiment of the invention.
Fig. 5 is the diagrammatic cross-section after the working face caving of one embodiment of the invention.
In figure：
1：Stope drift active workings；
2：Working face；
3：Goaf；
4：Outstanding dew top plate；
5：Two cavate hollow bolts；51：Injected hole
6：Grouting pump, 61：A liquid pumps, 62：B liquid pumps；
7：Grouting Pipe, 71：A liquid grouts pipe, 72：B liquid grout pipes；
8：Drilling.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
1-5 specifically describes according to the ... of the embodiment of the present invention a kind of for the caving of face end goaf below in conjunction with the accompanying drawings
Method.
A kind of method for the caving of face end goaf according to the ... of the embodiment of the present invention, including：
Step is 1.：When tunneling stope drift active workings 1, the top plate of the stope drift active workings 1 carries out supporting using hollow grouting anchor.It is hollow
The density and spacing of grouted anchor bar can be adjusted according to different geological conditions.Strengthening supporting section is being needed, can also used single
Body hydraulic prop or other modes carry out auxiliary shoring to top plate, to ensure production safety.The two of stope drift active workings 1 help can be used general
Logical anchor pole carries out supporting.Hollow grouting anchor after anchoring is evenly distributed on the top plate of stope drift active workings 1.
Step is 2.：As shown in Figs. 1-2, when working face 2 is pushed ahead, by the hollow grouting anchor 5 in the front of working face 2 with
Grouting Pipe 7 connects, to ensure that the hollow grouting anchor 5 positioned at 2 rear goaf 3 of working face is connected with Grouting Pipe 7, and can be just
Normal slip casting.Installation Grouting Pipe is to ensure that the working space of underground work personnel is located at 2 end of working face or stope drift active workings 1 in advance
It sets.
Step is 3.：As shown in Figs. 1-2, working face 2 is pushed ahead, and the rear goaf top plate of 2 end of the working face is outstanding
After revealing certain length, by closing on one lateral working face of goaf, 2 direction, to the hollow slip casting anchor positioned at the goaf 3
Bar 5 is implanted sequentially the expandable chemical grout of the volume.Chemical grout expands in roof rock mass, since outstanding dew top plate 4 faces
Nearly 3 side of goaf has certain scope of freedom, then the roof rock mass for closing on goaf 3 is first subjected to what chemical grout expansion generated
Pressure breaking is caving, while being that the top plate that periphery is not caving forms the scope of freedom again, and the top plate closed on is by 5 note of hollow grouting anchor
It after slurry, is caving by slurry dilatancy power, to cause the outstanding dew top plate in goaf to be collapsed successively by one lateral working face of goaf, 2 direction
It falls.2 front hollow grouting anchor of working face is connected with Grouting Pipe 7 later, as illustrated in figures 4-5.
Stope drift active workings top plate uses 5 supporting of hollow grouting anchor, while hollow grouting anchor 5 is directly as the slip casting of caving
Anchor pole, without in caving, drilling again to top plate again, keeping caving process more simple, cost reduction.Hollow slip casting anchor
Bar 5 is distributed on 1 top plate of stope drift active workings in working face rear goaf 3 so that range of grouting is wider, on working face
The top plate caving effect of corner is more preferable.
Preferably, in one embodiment, as shown in figure 3, step 2. in the hollow grouting anchor that uses in two cavates
Spare anchor bar 5；The expandable chemical grout of volume is made of two different A slurries and B slurries, and A slurries are separating shape with B slurries
Volume expansion does not occur under state, and generating body product expands under admixture；A slurries and B slurries are respectively by hollow grouting anchor
Two cavity injection holes 8 and roof rock mass in, and in roof rock mass mix after volume expand.
In other words, upon mixing, volume expands for two different slurries, that is, A slurries and B slurries.Step 2. in adopt
Hollow grouting anchor is two cavate hollow bolts 5, which is hollow, and is separated in centre
For two cavitys, each cavity has and extraneous identical injected hole.A slurries and B slurries inject two cavates by Grouting Pipe 7 respectively
It in two cavitys of hollow bolt, and is flowed out by the injected hole on anchor rod body, the slurry pressure of A slurries and B slurries in injection
Stop slip casting, A slurries and B slurries after being full of borehole space and rock mass gap down and come into full contact with mixing, then volume occurs swollen
It is swollen, pressure, to make rock mass generate new crack or preexisting crack is made to expand, final slip casting region top plate are generated to surrounding rock body
Rock mass is caving.
As a result, after slip casting in, carry out broken rock by the pressure generated after volume expansion after A slurries and the mixing of B slurries and put
Top, when without slip casting, grouting pump generates high pressure, therefore is reduced to the reliability requirement of grouting pump and Grouting Pipe 7, to drop
Low cost, and improve broken rock effect.
1-5 specifically describes one kind according to the ... of the embodiment of the present invention and is put for 2 end goaf of working face below in conjunction with the accompanying drawings
The method on top.
First, when tunneling stope drift active workings 1, back carries out supporting using two cavate hollow grouting anchors 5, also can be same
Shi Caiyong other modes carry out strengthening supporting.Then when working face 2 is pushed ahead, two cavates in 2 front of working face are hollow
Grouted anchor bar 5 is connected with Grouting Pipe 7, after ensureing that working face 2 is pushed ahead, the two of 2 end goaf top plate of working face
Cavate hollow grouting anchor can work.Finally, working face 2 is pushed ahead, the outstanding dew of tip position rear goaf top plate
After certain length, to outstanding dew top plate 4 by carrying out slip casting, A slurries and B slurries close to one laterally closer working face of goaf, 2 side
Top plate is injected by the different cavitys of two cavate hollow grouting anchors respectively, volume expansion after being mixed in roof rock mass expands top
Plate preexisting crack simultaneously generates new crack, finally roof caving is made to get off.This method broken rock and caving effect are good, at low cost.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, do not indicate or imply the indicated device or element must have a particular orientation, with spy
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or "lower"
It may include that the first and second features are in direct contact, can also not be to be in direct contact but pass through it including the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " include first special
Sign is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include fisrt feature right over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (2)
1. a kind of method for the caving of face end goaf, the expandable chemical grout of injected slurry volume into top plate, from
And breaking roof rock mass carries out caving, which is characterized in that 1. including step：When tunneling stope drift active workings, which adopts
Supporting is carried out with hollow grouting anchor；Step is 2.：The hollow grouting anchor is connect with Grouting Pipe；Step is 3.：Work towards
It is pushed forward into after the outstanding dew certain length of rear goaf top plate of the face end, by closing on one lateral working face of goaf
Direction is implanted sequentially the expandable chemical grout of the volume to the hollow grouting anchor positioned at the goaf, has waited for
The hollow grouting anchor in front of working face is connected with the Grouting Pipe at after caving, waits for next slip casting caving.
2. a kind of method for the caving of face end goaf according to claim 1, it is characterised in that：The step
The rapid 2. middle hollow grouting anchor used is two cavate anchor pole；The expandable chemical grout of volume is by two kinds of different slurries
Liquid forms, and volume expansion does not occur under separated position for described two difference slurries, and generating body product expands under admixture；
Described two difference slurries inject roof rock mass by the different cavitys of the hollow grouting anchor respectively, and are mixed in roof rock mass
It is expanded after conjunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610938702.3A CN106437799B (en) | 2016-10-25 | 2016-10-25 | A method of being used for the caving of face end goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610938702.3A CN106437799B (en) | 2016-10-25 | 2016-10-25 | A method of being used for the caving of face end goaf |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437799A CN106437799A (en) | 2017-02-22 |
| CN106437799B true CN106437799B (en) | 2018-08-28 |
Family
ID=58178331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610938702.3A Active CN106437799B (en) | 2016-10-25 | 2016-10-25 | A method of being used for the caving of face end goaf |
Country Status (1)
| Country | Link |
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| CN (1) | CN106437799B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009097261A1 (en) * | 2008-01-28 | 2009-08-06 | Jennmar Corporation | Resin grouts for anchor systems |
| CN101503959A (en) * | 2008-11-26 | 2009-08-12 | 枣庄矿业（集团）有限责任公司滨湖煤矿 | Gob-side entry retaining support method |
| CN101509395B (en) * | 2009-03-16 | 2011-11-09 | 太原理工大学 | The roof caving and tunnel protecting method |
| CN102704936B (en) * | 2012-06-13 | 2014-09-24 | 太原理工大学 | Caving control method for fully mechanized mining face tip mining road way top plate |
| CN103032086B (en) * | 2012-12-07 | 2015-04-29 | 中国矿业大学 | Method for filling resin explosive cartridge in drilled hole of tunnel roof anchor rod |
| CN104533418B (en) * | 2014-11-19 | 2016-09-28 | 太原理工大学 | A kind of underground coal mine deep hole static(al) that is used for breaks rock dust |
-
2016
- 2016-10-25 CN CN201610938702.3A patent/CN106437799B/en active Active
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| CN106437799A (en) | 2017-02-22 |
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