CN104912588A - 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
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- CN104912588A CN104912588A CN201510249945.1A CN201510249945A CN104912588A CN 104912588 A CN104912588 A CN 104912588A CN 201510249945 A CN201510249945 A CN 201510249945A CN 104912588 A CN104912588 A CN 104912588A
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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 method that coal bed fracturing is anti-reflection, especially a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel.
Background technology
The most of coal seam of China has the feature of high methane, high adsorption, low-permeable, and along with the increase of the seam mining degree of depth, low-permeable problem is more outstanding, this brings potential safety hazard to coal seam tunnelling, and have a strong impact on driving speed, cause colliery excavation replacement nervous.At present, the anti-reflection measure of release that China's high gassy and low permeability coal seam generally adopts comprises hydraulic slotted liner technique, fracturing, Deephole pre-splitting blasting etc.Hydraulic slotted liner technique enhanced gas extraction gas method and technology complex process, technical difficulty are large, and the seam cut out is not wide, and the crack of generation is few, and effect is undesirable; Hydraulic fracturing process is complicated, and equipment is huge, expensive, and higher water injection pressure easily destroys tunnel, induction coal and gas prominent accident; The charge process of Deephole pre-splitting blasting technology is complicated, easily occur phenomenons such as " miso-fires ", and the huge energy of explosion can induce the generation of coal and gas prominent in blasting process.
Summary of the invention
The present invention seeks to the weak point overcome in prior art, propose a kind of method of effective anti-reflection coal body of spalling in heading speedy drivage process, 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 the meet head on perforate of geometric center position a first spalling hole of constructing in tunnel, in the first spalling hole, insert first Grouting Pipe, adopt the aperture of polyurethane to the first spalling hole to seal;
B, directly over the first spalling hole, immediately below, front-left and front-right respectively to construct a second spalling hole, and insert second Grouting Pipe respectively respectively in each second spalling hole, adopts the aperture of polyurethane to each second spalling hole to seal;
C, with the second spalling hole of the first spalling hole same level directly over, immediately below respectively construct a 3rd spalling hole, in each 3rd spalling hole, insert the 3rd Grouting Pipe respectively, the employing aperture of polyurethane to each 3rd spalling hole seals;
D, respectively to construct a drainage holes at the mid point of the first spalling hole and each 3rd spalling hole axial connecting line, and a drainage tube is inserted respectively in each drainage holes, aperture adopts polyurethane to seal, and opens the 4th valve that drainage tube is arranged, and starts the gas in coal seam, front, extraction tunnel;
E, in each 3rd spalling hole, inject quicklime slurries by each 3rd Grouting Pipe, when quicklime slurries from tunnel in coal seam meet head on to ooze out time, close the 3rd valve in each 3rd Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the first crackle between each 3rd spalling hole and each drainage holes;
After f, 1 ~ 3h, in each second spalling hole, quicklime slurries are injected by each second Grouting Pipe, when quicklime slurries meet head on to ooze out from tunnel in coal seam, close the second valve in each second Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the second crackle between each second spalling hole and each 3rd spalling hole, between each second spalling hole and each drainage holes, produce the first crackle;
After g, 1 ~ 3h, in the first spalling hole, quicklime slurries are injected by the first Grouting Pipe, when quicklime slurries from tunnel meet head on to ooze out time, close the first valve in the first Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the second crackle between each second spalling hole and the first spalling hole, between each second spalling hole and drainage holes, produce the first crackle;
The aperture of the first described spalling hole, the second spalling hole, the 3rd spalling hole and drainage holes is Ф 70 ~ Ф 120mm, and hole depth is more than 40m; The axis of the first described spalling hole, the second spalling hole, the 3rd spalling hole and drainage holes is non-intersect, and all with tunnel meet head on vertical.
Beneficial effect of the present invention:
(1) to the central injection quicklime slurries that intersect of boring, difference is holed control hole each other, the burst pressure relying on quicklime slurries to produce makes coal seam produce gap between boring, the crackle produced can also as scope of freedom during boring spalling below, be conducive to cracking net, thus increase substantially gas permeability of coal seam.
(2) cost is low, and required quicklime slurries are cheap, wide material sources; Work progress is safe and reliable, friction, without slungshot, noiselessness, pollution-free, without burning things which may cause a fire disaster; Technique is simple, facilitates manual operation.
Accompanying drawing explanation
Fig. 1 is drill pattern of the present invention schematic diagram;
Fig. 2 is that A-A generalized section is arranged in boring perforate of the present invention;
Fig. 3 is that B-B generalized section is arranged in boring perforate of the present invention.
In figure: 1-coal seam, 2-tunnel, 3-meets head on, 4-first spalling hole, 5-first Grouting Pipe, 6-polyurethane, 7-second spalling hole, 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-quicklime slurries, 15-the 3rd valve, 16-first crackle, 17-second valve, 18-second crackle, 19-first valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, in coal seam 1, meet head on 3 geometric center position perforates a first spalling hole 4 of constructing in tunnel 2, insert first Grouting Pipe 5 in the first spalling hole 4, adopts the aperture of polyurethane 6 to the first spalling hole 4 to seal; Directly over the first spalling hole 4, immediately below, front-left and front-right respectively construct a second spalling hole 7, and insert second Grouting Pipe 8 respectively respectively in each second spalling hole 7, adopt the aperture of polyurethane 6 to each second spalling hole 7 to seal; With directly over the second spalling hole 7 of the first spalling hole 4 same level, immediately below respectively construct a 3rd spalling hole 9, in each 3rd spalling hole 9, insert the 3rd Grouting Pipe 10 respectively, the employing aperture of polyurethane 6 to each 3rd spalling hole 9 seals; Respectively to construct with the mid point of each 3rd spalling hole 9 axial connecting line in the first spalling hole 4 drainage holes 11, and insert a drainage tube 12 respectively in each drainage holes 11, aperture adopts polyurethane 6 to seal; Open the 4th valve 13 that drainage tube is arranged, start the gas in coal seam, front, extraction tunnel 21; In each 3rd spalling hole 9, quicklime slurries 14 are injected by each 3rd Grouting Pipe 10, when quicklime slurries 14 from tunnel 2 meet head on 3 ooze out time, close the 3rd valve 15 in each 3rd Grouting Pipe 10, quicklime slurries 14 react the burst pressure produced makes coal seam 1 produce the first crackle 16 between each 3rd spalling hole 9 and each drainage holes 11; After 1 ~ 3h, in each second spalling hole 7, quicklime slurries 14 are injected by each second Grouting Pipe 8, when quicklime slurries 14 from tunnel 2 meet head on 3 ooze out time, close the second valve 17 in each second Grouting Pipe 8, quicklime slurries 14 react the burst pressure produced makes coal seam 1 produce the second crackle 18 between each second spalling hole 7 and each 3rd spalling hole 9, between each second spalling hole 7 and each drainage holes 11, produce the first crackle 16; After 1 ~ 3h, in the first spalling hole 4, quicklime slurries 14 are injected by the first Grouting Pipe 5, when quicklime slurries 14 from tunnel 2 meet head on 3 ooze out time, close the first valve 19 in the first Grouting Pipe 5, quicklime slurries 14 react the burst pressure produced makes coal seam 1 produce the second crackle 18 between each second spalling hole 7 and the first spalling hole 4, between each second spalling hole 7 and drainage holes 11, produce the first crackle 16.
Described quicklime slurries are mass ratio is water: ash=1:1.5 ~ 2; Ash is made up of quicklime, hydraulicity material, delayer, water reducing agent, wherein: quicklime, hydraulicity material, delayer, water reducing agent mass ratio are 50:10:5:1.
Described hydraulicity material is portland cement; Delayer is sodium carbonate; Water reducing agent is naphthalene series high-efficiency water-reducing agent.
Claims (4)
1., for a spalling anti-reflection method for down-hole coal bed tunnel speedy drivage, it is characterized in that comprising the steps:
A, in coal seam the meet head on perforate of geometric center position a first spalling hole of constructing in tunnel, in the first spalling hole, insert first Grouting Pipe, adopt the aperture of polyurethane to the first spalling hole to seal;
B, directly over the first spalling hole, immediately below, front-left and front-right respectively to construct a second spalling hole, and insert second Grouting Pipe respectively respectively in each second spalling hole, adopts the aperture of polyurethane to each second spalling hole to seal;
C, with the second spalling hole of the first spalling hole same level directly over, immediately below respectively construct a 3rd spalling hole, in each 3rd spalling hole, insert the 3rd Grouting Pipe respectively, the employing aperture of polyurethane to each 3rd spalling hole seals;
D, respectively to construct a drainage holes at the mid point of the first spalling hole and each 3rd spalling hole axial connecting line, and a drainage tube is inserted respectively in each drainage holes, aperture adopts polyurethane to seal, and opens the 4th valve that drainage tube is arranged, and starts the gas in coal seam, front, extraction tunnel;
E, in each 3rd spalling hole, inject quicklime slurries by each 3rd Grouting Pipe, when quicklime slurries from tunnel in coal seam meet head on to ooze out time, close the 3rd valve in each 3rd Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the first crackle between each 3rd spalling hole and each drainage holes;
After f, 1 ~ 3h, in each second spalling hole, quicklime slurries are injected by each second Grouting Pipe, when quicklime slurries from tunnel meet head on to ooze out time, close the second valve in each second Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the second crackle between each second spalling hole and each 3rd spalling hole, between each second spalling hole and each drainage holes, produce the first crackle;
After g, 1 ~ 3h, in the first spalling hole, quicklime slurries are injected by the first Grouting Pipe, when quicklime slurries from tunnel meet head on to ooze out time, close the first valve in the first Grouting Pipe, the burst pressure that quicklime slurry reaction produces makes coal seam produce the second crackle between each second spalling hole and the first spalling hole, between each second spalling hole and drainage holes, produce the first crackle.
2. a kind of spalling anti-reflection method for the speedy drivage of down-hole coal bed tunnel according to claim 1, it is characterized in that 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, it is characterized in that described each second spalling hole and the first spalling hole are all at a distance of 100 ~ 150cm, each 3rd spalling hole and adjacent second spalling hole are 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, is characterized in that the grouting pressure of described quicklime slurries is 1 ~ 3MPa.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575204A (en) * | 2017-10-26 | 2018-01-12 | 重庆大学 | A kind of underground coal mine slot pressurize is oriented to 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 |
| CN111734485A (en) * | 2020-06-12 | 2020-10-02 | 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 |
Citations (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 |
| CN102900460A (en) * | 2012-11-06 | 2013-01-30 | 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 |
| CN103362514A (en) * | 2013-08-08 | 2013-10-23 | 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
Patent Citations (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 |
| CN102900460A (en) * | 2012-11-06 | 2013-01-30 | 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 |
| CN103362514A (en) * | 2013-08-08 | 2013-10-23 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575204A (en) * | 2017-10-26 | 2018-01-12 | 重庆大学 | A kind of underground coal mine slot pressurize is oriented to 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 |
| CN111734485A (en) * | 2020-06-12 | 2020-10-02 | 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 |
| 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 |
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| CN104912588B (en) | 2017-01-25 |
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