CN104912588B - Spalling permeability increasing method for rapid excavation of underground seam gateway - Google Patents
Spalling permeability increasing method for rapid excavation of underground seam gateway Download PDFInfo
- Publication number
- CN104912588B CN104912588B CN201510249945.1A CN201510249945A CN104912588B CN 104912588 B CN104912588 B CN 104912588B CN 201510249945 A CN201510249945 A CN 201510249945A CN 104912588 B CN104912588 B CN 104912588B
- Authority
- CN
- China
- Prior art keywords
- spalling
- hole
- quick lime
- holes
- grouting pipe
- 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.)
- Active
Links
Abstract
The invention discloses a spalling permeability increasing method for rapid excavation of an underground seam gateway. The method is particularly suitable for advancing pre-pumping of a high-gas low-permeability seam gateway. A first spalling hole is constructed in the head-on geometric center position of the seam gateway, and second spalling holes are formed in the positions over, under, left and right the first spalling hole; third spalling holes are constructed in the positions over and under the second spalling holes horizontal to the first spalling hole, and exhausting and mining holes are constructed in the center points of the connecting lines of the first spalling hole and the third spalling holes; after drilling is finished, quick lime grout is injected into the third spalling holes in a crossing manner, and the spalling holes are control holes of one another; and through spalling pressure generated by the holes, net-shaped cracks are generated between the holes, so that the coal permeability is greatly improved, the gas exhausting and mining efficiency is improved, and the excavation speed of the seam gateway is improved; and the method is simple in technology, convenient to operate, wide in grout source, cheap and low in cost.
Description
Technical field
The present invention relates to a kind of anti-reflection method of coal bed fracturing, especially a kind of for the speedy drivage of down-hole coal bed tunnel
Spalling anti-reflection method.
Background technology
The most of coal seam of China has the characteristics that high methane, high adsorption, low-permeable, and with seam mining depth
Increase, low-permeable problem is more prominent, and this brings potential safety hazard to heading driving, and has a strong impact on driving speed,
Lead to colliery excavation replacement nervous.At present, the anti-reflection measure of the commonly used release of China's high gassy and low permeability coal seam includes water
Power slot, fracturing, Deephole pre-splitting blasting etc..Hydraulic slotted liner technique enhanced gas extraction gas method and technology complex process, technical difficulty
Greatly, not, the crack of generation is few, and effect is undesirable for the seam width cutting out；Hydraulic fracturing process is complicated, and equipment is huge, expensive,
Higher water injection pressure is easily destroyed tunnel, induces coal and gas prominent accident；The charge process of Deephole pre-splitting blasting technology is multiple
Miscellaneous, easily phenomenons such as " miso-fires " occurs in blasting process, and the huge energy of explosion can induce the generation of coal and gas prominent.
Content of the invention
The present invention seeks to overcoming the weak point in prior art it is proposed that one kind is in heading speedy drivage process
In the effective anti-reflection coal body of spalling method, to realize heading speedy drivage.
The technical solution adopted for the present invention to solve the technical problems step is as follows:
A, in coal seam tunnel the meet head on perforate of geometric center position a first spalling hole of constructing, to the first spalling hole
It is inserted into first Grouting Pipe, using polyurethane, the aperture in the first spalling hole is sealed；
B, the surface in the first spalling hole, underface, front-left and front-right respectively one the second spalling hole of construction, and point
Do not insert second Grouting Pipe respectively to each second spalling in the hole, using polyurethane, the aperture in each the second spalling hole is entered
Row sealing；
C, respectively construct the 3rd spalling in the surface with the second spalling hole of the first spalling hole same level, underface
Hole, inserts the 3rd Grouting Pipe respectively to each the 3rd spalling in the hole, using the aperture to each the 3rd spalling hole for the polyurethane
Sealed；
D, respectively construct drainage holes at the midpoint of the first spalling hole and each the 3rd spalling hole axial connecting line, and to each
Extraction in the hole inserts a drainage tube respectively, and aperture is sealed using polyurethane, opens the 4th valve of setting on drainage tube,
Start the gas in coal seam in front of extraction tunnel；
E, from each the 3rd Grouting Pipe to each the 3rd spalling in the hole injection quick lime serosity, when quick lime serosity is from coal seam
When meeting head on to ooze out of interior tunnel, closes the 3rd valve in each the 3rd Grouting Pipe, the spalling pressure that quick lime slurry reaction produces
Power makes coal seam produce the first crackle between each the 3rd spalling hole and each drainage holes；
After f, 1～3h, from each second Grouting Pipe to each the second spalling in the hole injection quick lime serosity, when calculogenesis mortar
When meeting head on to ooze out in liquid tunnel in coal seam, close the second valve in each second Grouting Pipe, quick lime slurry reaction produces
Burst pressure makes coal seam produce the second crackle between each the second spalling hole and each the 3rd spalling hole, in each the second spalling
The first crackle is produced between hole and each drainage holes；
After g, 1～3h, quick lime serosity is injected to the first spalling in the hole from the first Grouting Pipe, when quick lime serosity is from tunnel
When meeting head on to ooze out, close the first Grouting Pipe on the first valve, quick lime slurry reaction produce burst pressure so that coal seam is existed
Produce the second crackle between each the second spalling hole and first spalling hole, produce the between each the second spalling hole and drainage holes
One crackle；
The first described spalling hole, the aperture in the second spalling hole, the 3rd spalling hole and drainage holes are ф 70～ф 120mm,
Hole depth is more than 40m；The first described spalling hole, the axis in the second spalling hole, the 3rd spalling hole and drainage holes are non-intersect, and all
With tunnel meet head on vertical.
Beneficial effects of the present invention:
(1) intersect injection quick lime serosity, different boring control holes each other in the middle of boring, rely on quick lime serosity to produce
Burst pressure make coal seam produce gap between boring, the crackle of generation be also used as holing below spalling when freedom
Face, is conducive to cracking net, thus increasing substantially gas permeability of coal seam.
(2) low cost, required quick lime serosity is cheap, wide material sources；Work progress is safe and reliable, without friction,
No slungshot, noiselessness, pollution-free, no burning things which may cause a fire disaster；Process is simple, convenient artificial operation.
Brief description
Fig. 1 is drill pattern's schematic diagram of the present invention；
Fig. 2 is the boring perforate arrangement a-a generalized section of the present invention；
Fig. 3 is the boring perforate arrangement b-b generalized section of the present invention.
In figure: 1- coal seam, 2- tunnel, 3- meets head on, 4- the first spalling hole, 5- first Grouting Pipe, 6- polyurethane, and 7- second is swollen
Ceasma, 8- second Grouting Pipe, 9- the 3rd spalling hole, 10- the 3rd Grouting Pipe, 11- drainage holes, 12- drainage tube, 13- the 4th valve,
14- quick lime serosity, 15- the 3rd valve, 16- first crackle, 17- second valve, 18- second crackle, 19- first valve.
Specific embodiment
Below in conjunction with the accompanying drawings one embodiment of the present of invention is further described:
As shown in figure 1, in coal seam 1 tunnel 2 meet head on 3 geometric center position perforates a first spalling hole 4 of constructing,
It is inserted into first Grouting Pipe 5 to the first spalling hole 4, using polyurethane 6, the aperture in the first spalling hole 4 is sealed；?
The surface in the first spalling hole 4, underface, front-left and front-right are respectively constructed a second spalling hole 7, and respectively to each the
Insert second Grouting Pipe 8 in two spalling holes 7 respectively, using polyurethane 6, the aperture in each the second spalling hole 7 is carried out close
Envelope；Respectively construct a 3rd spalling hole 9 with the surface in the second spalling hole 7 of the first spalling hole 4 same level, underface, to every
Insert the 3rd Grouting Pipe 10 respectively in individual 3rd spalling hole 9, using polyurethane 6, the aperture in each the 3rd spalling hole 9 is entered
Row sealing；Respectively construct drainage holes 11 at the midpoint in the first spalling hole 4 and each the 3rd spalling hole 9 axial connecting line, and to every
A drainage tube 12 is inserted respectively, aperture is sealed using polyurethane 6 in individual drainage holes 11；Open on drainage tube the of setting
Four valves 13, start the gas in extraction tunnel 2 front coal seam 1；Note in from each the 3rd Grouting Pipe 10 to each the 3rd spalling hole 9
Enter quick lime serosity 14, when quick lime serosity 14 from tunnel 2 meet head on 3 ooze out when, close in each the 3rd Grouting Pipe 10
Three valves 15, the burst pressure that quick lime serosity 14 reaction produces makes coal seam 1 in each the 3rd spalling hole 9 and each drainage holes 11
Between produce the first crackle 16；After 1～3h, from each second Grouting Pipe 8 to each second spalling hole 7 in inject quick lime serosity
14, when quick lime serosity 14 from tunnel 2 meet head on 3 ooze out when, close the second valve 17 in each second Grouting Pipe 8, calculogenesis
The burst pressure that the reaction of grey serosity 14 produces makes coal seam 1 produce the between each second spalling hole 7 and each the 3rd spalling hole 9
Two crackles 18, produce the first crackle 16 between each the second spalling hole 7 and each drainage holes 11；After 1～3h, by the first slip casting
Pipe 5 injects quick lime serosity 14 into the first spalling hole 4, when quick lime serosity 14 from tunnel 2 meet head on 3 ooze out when, close the
The first valve 19 in one Grouting Pipe 5, the burst pressure that quick lime serosity 14 reaction produces makes coal seam 1 in each the second spalling hole
7 and first produce the second crackle 18 between spalling hole 4, produce the first crackle between each the second spalling hole 7 and drainage holes 11
16.
Described quick lime serosity is water for mass ratio: ash=1:1.5 ~ 2；Ash by quick lime, hydraulicity material, delayer, subtract
Water preparation forms, wherein: quick lime, hydraulicity material, delayer, water reducer mass ratio are 50:10:5:1.
Described hydraulicity material is portland cement；Delayer is sodium carbonate；Water reducer is naphthalene series high-efficiency water-reducing agent.
Claims (4)
1. a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel is it is characterised in that comprise the steps:
A, in coal seam tunnel the meet head on perforate of geometric center position a first spalling hole of constructing, to first spalling in the hole insert
Enter first Grouting Pipe, using polyurethane, the aperture in the first spalling hole is sealed；
B, the surface in the first spalling hole, underface, front-left and front-right are respectively constructed a second spalling hole, and respectively to
Each second spalling in the hole inserts second Grouting Pipe respectively, using polyurethane, the aperture in each the second spalling hole is carried out close
Envelope；
C, respectively construct a 3rd spalling hole in the surface with the second spalling hole of the first spalling hole same level, underface, to
Each the 3rd spalling in the hole inserts the 3rd Grouting Pipe respectively, using polyurethane, the aperture in each the 3rd spalling hole is carried out close
Envelope；
D, respectively construct drainage holes at the midpoint of the first spalling hole and each the 3rd spalling hole axial connecting line, and to each extraction
In the hole inserts a drainage tube respectively, and aperture is sealed using polyurethane, opens the 4th valve of setting on drainage tube, starts
The gas in coal seam in front of extraction tunnel；
E, from each the 3rd Grouting Pipe to each the 3rd spalling in the hole injection quick lime serosity, when quick lime serosity is from coal seam Nei Xiang
When meeting head on to ooze out of road, closes the 3rd valve in each the 3rd Grouting Pipe, and the burst pressure that quick lime slurry reaction produces makes
Coal seam produces the first crackle between each the 3rd spalling hole and adjacent drainage holes；
After f, 1～3h, from each second Grouting Pipe to each second spalling in the hole injection quick lime serosity, when quick lime serosity from
When meeting head on to ooze out of tunnel, closes the second valve in each second Grouting Pipe, the burst pressure that quick lime slurry reaction produces
Make coal seam produce the second crackle between each the second spalling hole and adjacent 3rd spalling hole, each second spalling hole with adjacent
The first crackle is produced between drainage holes；
After g, 1～3h, quick lime serosity is injected to the first spalling in the hole from the first Grouting Pipe, when quick lime serosity meeting from tunnel
When head oozes out, close the first valve in the first Grouting Pipe, the burst pressure that quick lime slurry reaction produces makes coal seam at each
Produce the second crackle between second spalling hole and the first spalling hole, produce the between each the second spalling hole and adjacent drainage holes
One crackle.
2. a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel according to claim 1, its feature exists
In the first described spalling hole, the second spalling hole, the 3rd spalling hole, drainage holes axis all with tunnel meet head on vertical.
3. a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel according to claim 1, its feature exists
In each described second spalling hole with the first spalling hole all at a distance of 100 ~ 150cm, each the 3rd spalling hole is swollen with adjacent second
Ceasma is all at a distance of 100 ~ 150cm.
4. a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel according to claim 1, its feature exists
In described quick lime serosity grouting pressure be 1～3mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249945.1A CN104912588B (en) | 2015-05-18 | 2015-05-18 | Spalling permeability increasing method for rapid excavation of underground seam gateway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249945.1A CN104912588B (en) | 2015-05-18 | 2015-05-18 | Spalling permeability increasing method for rapid excavation of underground seam gateway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104912588A CN104912588A (en) | 2015-09-16 |
| CN104912588B true CN104912588B (en) | 2017-01-25 |
Family
ID=54081981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510249945.1A Active CN104912588B (en) | 2015-05-18 | 2015-05-18 | Spalling permeability increasing method for rapid excavation of underground seam gateway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104912588B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575204B (en) * | 2017-10-26 | 2019-04-02 | 重庆大学 | A kind of underground coal mine slot pressure maintaining guiding pressure break anti-reflection method |
| CN108915695A (en) * | 2018-07-09 | 2018-11-30 | 河南理工大学 | A kind of projecting coal bed stope drift active workings static state fracturing speedy drivage method |
| CN111734485B (en) * | 2020-06-12 | 2022-02-01 | 中国煤炭地质总局勘查研究总院 | Method and device for preventing and controlling local rock burst of coal mine |
| CN111810084A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Coal bed mesh gas extraction drilling construction method of water jet drilling machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1434134A1 (en) * | 1987-01-15 | 1988-10-30 | Институт горного дела им.А.А.Скочинского | Method of degassing coal strata in its development |
| CN102900460B (en) * | 2012-11-06 | 2014-10-29 | 中国矿业大学 | Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam |
| CN103362514B (en) * | 2013-08-08 | 2015-06-03 | 六盘水师范学院 | Speedy tunneling method for gas drainage roadway |
| CN103899348A (en) * | 2014-04-23 | 2014-07-02 | 重庆市能源投资集团科技有限责任公司 | Method for fast extracting gas on coalface |
-
2015
- 2015-05-18 CN CN201510249945.1A patent/CN104912588B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104912588A (en) | 2015-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107701188B (en) | One kind cutting top destressing method for the mined out side static state spalling of gob side entry driving thin coal pillar | |
| CN102383828B (en) | Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction | |
| CN109209472B (en) | Punching, blasting and water injection mutual coupling coal seam pressure relief and outburst prevention method | |
| CN102140901B (en) | High pressure resistant drilled hole sealing method | |
| CN103696800B (en) | A kind of brill cuts pressure and takes out method | |
| CN101614135B (en) | Drilling-explosion-pumping triadic gas extraction method | |
| CN104912588B (en) | Spalling permeability increasing method for rapid excavation of underground seam gateway | |
| CN102635388A (en) | Interaction permeability-increasing method of pre-splitting blasting and hydraulic cracking of coal seam | |
| CN101666241B (en) | Integrated drilling-blasting-pressurizing-drawing protrusion preventing method for regional gas control | |
| CN203891922U (en) | Effective extraction system for gas in coal seam | |
| CN105041344B (en) | High-pressure gas seam-expanding, grouting and water-plugging method for precutting trough of microfissure surrounding rock | |
| CN110195580B (en) | Gas-liquid two-phase combined coal bed permeability increasing method | |
| CN106050185B (en) | A kind of coal mining bottom plate meets the control method that tomography produces water inrush channel | |
| CN107120137B (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN104314606A (en) | Hydraulic cutting and gas explosion combined enhancing extraction method for fracturing coal body in drill hole | |
| CN103233738A (en) | Comprehensive weakening method of top coal of heavy-pitch super high seam | |
| CN103195390A (en) | Mining-coal bed nearly horizontal gas extraction borehole sealing method | |
| CN102937011A (en) | Secondary grouting and plugging device and method of regional crack field of gas extraction and drilling group | |
| CN105114117A (en) | Gas drainage method based on expansion material | |
| CN105114116A (en) | Method for strengthening regional gas extraction through hydro-thermal coupling fracturing | |
| CN104963670A (en) | Method for expanding and increasing permeability of hole volumes for drilling in underground coal seam | |
| CN104594866A (en) | New method for rapid gas drainage technology based on low permeability coal bed gas phase fracturing | |
| CN105422043A (en) | Underground coal mine coal seam water injection and hydraulic fracturing drilled hole sealing method | |
| CN109578058B (en) | Method for improving gas extraction concentration of extraction borehole through auxiliary drilling | |
| CN104712288B (en) | Argillaceous agglutination soft rock-soil body high energy concentrating gas fracturing grouting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |