CN110259447A - Underground coal mine oriented perforating pressure break cuts top release shield lane method - Google Patents
Underground coal mine oriented perforating pressure break cuts top release shield lane method Download PDFInfo
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- CN110259447A CN110259447A CN201910493783.4A CN201910493783A CN110259447A CN 110259447 A CN110259447 A CN 110259447A CN 201910493783 A CN201910493783 A CN 201910493783A CN 110259447 A CN110259447 A CN 110259447A
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- tunnel
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- pressure break
- drilling
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000003245 coal Substances 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 18
- 238000012806 monitoring device Methods 0.000 claims description 8
- 239000003721 gunpowder Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to the releases in underground coal mine release shield lane method, especially tight roof tunnel to protect lane method, and specially a kind of underground coal mine oriented perforating pressure break cuts top release shield lane method.Solve the problems, such as that coal mine tight roof difficulty collapses, the outstanding top of large area causes that roadway deformation is serious, is difficult to supporting.Continuous fracture surface can be formed after the method for the invention pressure break, tight roof is oriented and is caving, to reduce the lateral hanging deck area in tunnel, improve laneway stress environment.Stress field environment and working face mining condition according to locating for tunnel, design reasonably cut top release shield lane scheme, utmostly reduce deformation of the surrounding rock in tunnel, guarantee the safety and high efficiency in coal seam.Present invention ambient stress according to locating for tunnel and rock stratum bearing features, adjustable fracturing scheme；Composite gun perforation fracturing can form continuous fracture surface in rock stratum, and fracturing effect is good；Composite gun perforation fracturing method is small to rock convergence measure, can utmostly reduce pressure break to the disturbance deformation in tunnel.
Description
Technical field
The present invention relates to the releases in underground coal mine release shield lane method, especially tight roof tunnel to protect lane method, specifically
Top release, which is cut, for a kind of underground coal mine oriented perforating pressure break protects lane method.
Background technique
Subterranean coal exploitation, CONTROL OF STRATA MOVEMENT is the core of coal seam safety and high efficiency, when especially meeting tight roof preservation, because
Tight roof intensity is big, is not easy to be broken, and the outstanding top of tight roof large area causes working face stope stress to concentrate, and roadway deformation destroys
The problems such as serious.The methods of hydraulic fracturing, explosion are mostly used to the control of tight roof at present, hydraulic fracturing is answered by rock stratum three-dimensional
The factors such as power, rock cranny preservation are affected, and cannot achieve that rock stratum is caving is precisely controlled；The method of explosion damages rock mass
It is big to hurt degree, also cannot achieve efficient control.Compound technique of perforating couples pressure break by clipped wire subflow, high energy gas, in rock
The neat fracture surface that orientation is formed in layer, is precisely controlled to can realize to what rock stratum was caving.But current underground coal mine is not yet big
Area application compound technique of perforating, for the specific method improved using compound technique of perforating to roadway surrounding rock stress characteristic
It still requires study with technique.
Summary of the invention
The present invention solves the problems, such as that coal mine tight roof difficulty collapses, the outstanding top of large area causes that roadway deformation is serious, is difficult to supporting,
A kind of underground coal mine oriented perforating pressure break is provided and cuts top release shield lane method.
The present invention is achieved by the following technical scheme: underground coal mine oriented perforating pressure break cuts top release shield lane method,
It is to be realized by following steps:
A. working face is selected close to the tunnel for closing on goaf side as control target, tunnel is divided into several segments, at every section
The monitoring device for monitoring roadway deformation situation is arranged in tunnel, by closing on goaf side top plate to adopting in every section of tunnel
Dead zone direction construction drill drills at angle theta with back plane, continuously arranges brill along advance of the face direction with spacing L
Hole；
B. drilling orifice reserves certain length as sealing section, fills composite gun perforation within the scope of remaining interior for removing sealing section that drill
Device is equipped with perforating bullet and gunpowder in composite perforator；
C. the composite perforator in each section of tunnel is successively ignited, sealing of hole is implemented to drilling in sealing section before igniting, respectively in drilling
The primacord of composite perforator pass through sealing of hole and draw drilling, connect in drilling exit primacord with detonator, each detonator and
Trigger connection；Trigger detonating primer, detonator ignite primacord, and primacord ignites the perforating bullet and fire in composite perforator
Medicine；
D. after when leading portion tunnel, composite perforator is detonated, if monitoring device monitor when leading portion roadway's sides or roof and floor draw
Quick-fried front and back shifts near deflection more than or equal to 1000mm, then increases the drillable length in adjacent latter section of tunnel, drillable length lengthens
Amount is (deflection * 3)/4, up to being detonated when leading portion roadway's sides and roof and floor shift near deflection and stop less than 1000mm
Increase the drillable length in latter section of tunnel.
Continuous fracture surface can be formed after the method for the invention pressure break, and tight roof is oriented and is caving, from
And the lateral hanging deck area in tunnel is reduced, improve laneway stress environment.Stress field environment and working face mining item according to locating for tunnel
Part, design reasonably cut top release shield lane scheme, utmostly reduce deformation of the surrounding rock in tunnel, guarantee that the safe and efficient of coal seam is opened
It adopts.The present invention has the following advantages: 1) ambient stress according to locating for tunnel and rock stratum bearing features, adjustable fracturing scheme are clever
It is active strong；2) the composite gun perforation fracturing method can form continuous fracture surface in rock stratum, and fracturing effect is good；3) composite gun perforation causes
Cracking method is small to rock convergence measure, can utmostly reduce pressure break to the disturbance deformation in tunnel；4) this method operating process and technique
Simply, popularization and application foreground is extensive.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the invention；
Fig. 2 is the sectional view of Fig. 1；
Fig. 3 is perforation connection schematic diagram of the present invention.
In figure: 1- working face, 2- close on goaf, the tunnel 3-, 4- drilling, 5- sealing section, 6- primacord, 7-
Detonator, 8- trigger, 9- apparatus to cause bursting.
Specific embodiment
Underground coal mine oriented perforating pressure break cuts top release shield lane method, is realized by following steps:
A. it selectes working face 1 close to closing on the tunnel 3 of 2 side of goaf as control target, tunnel 3 is divided for several segments,
The monitoring device 9 for monitoring roadway deformation situation is arranged in every section of tunnel, is pushed up in every section of tunnel by closing on 2 side of goaf
Plate is to 2 direction construction drill 4 of goaf is closed on, and 4 place planes of drilling are perpendicular to back plane, drilling 4 and back
Plane is at angle theta, and drilling 4 is continuously arranged with spacing L along 1 direction of propulsion of working face；
B. drill the reserved sealing section 5 in 4 apertures, is removed within the scope of remaining of sealing section 5 in drilling 4 and fills composite perforator, compound to penetrate
Perforating bullet and gunpowder are housed in the device of hole；
C. it successively ignites the composite perforator in each section of tunnel, sealing of hole is implemented to drilling in sealing section 5 before igniting, respectively drill 4
In the primacord 6 of composite perforator pass through sealing of hole and draw drilling 4, drilling, 4 exit primacords 6 are connect with detonator 7, respectively
Detonator 7 is connect with trigger 8；8 detonating primer 7 of trigger, detonator 7 ignite primacord 6, and primacord 6 is ignited in composite perforator
Perforating bullet and gunpowder；
D. after when leading portion tunnel, composite perforator is detonated, if monitoring device monitor when leading portion roadway's sides or roof and floor draw
Quick-fried front and back shifts near deflection more than or equal to 1000mm, then increases the drillable length in adjacent latter section of tunnel, drillable length lengthens
Amount is (deflection * 3)/4, up to being detonated when leading portion roadway's sides and roof and floor shift near deflection and stop less than 1000mm
Increase latter section of tunnel drillable length (be less than 1000mm, the drillable length in adjacent latter section of tunnel is just not necessarily to be further added by, and
It is and is detonated when the drillable length in leading portion tunnel is consistent).
When it is implemented, the length in every section of tunnel is 30-50m；In every section of tunnel, monitoring device 9 is arranged every 2 ~ 3m
One；Drilling 4 is 60 ~ 80 ° with the angle, θ of back plane, and the 4 spacing L of drilling is 1.5 ~ 2m；4 sealing section that drills, 5 length
It is the 1/4 of drillable length；Every meter of 800 ~ 900g of gunpowder dose in composite perforator, 10/m of perforating bullet density.
If 1 two sides tunnel 3 of working face is close to close on goaf 2, in 1 two sides tunnel 3 of working face arrangement drill into
Row combined perforation fracturing.
Claims (7)
1. a kind of underground coal mine oriented perforating pressure break cuts top release shield lane method, which is characterized in that realized by following steps:
A. it selectes working face (1) and is used as control target close to the tunnel (3) for closing on goaf (2) side, by tunnel (3) if being divided into
Dry section, arranges the monitoring device (9) for monitoring roadway deformation situation in every section of tunnel, mined out by closing in every section of tunnel
Area (2) side top plate is to goaf (2) direction construction drill (4) is closed on, and plane is flat perpendicular to back where drilling (4)
Face, drills (4) and back plane is at angle theta, continuously arranges drilling (4) along working face (1) direction of propulsion with spacing L；
B. sealing section (5) are reserved in drilling (4) aperture, are removed within the scope of remaining of sealing section (5) in drilling (4) and are filled composite gun perforation
Device is equipped with perforating bullet and gunpowder in composite perforator；
C. the composite perforator in each section of tunnel is successively ignited, sealing of hole is implemented to drilling in sealing section (5) before igniting, it is each to bore
The primacord (6) of composite perforator in hole (4) passes through sealing of hole and draws drilling (4), in drilling (4) exit primacord (6)
It is connect with detonator (7), each detonator (7) connect with trigger (8)；Trigger (8) detonating primer (7), detonator (7) ignite primacord
(6), primacord (6) ignites the perforating bullet and gunpowder in composite perforator；
D. after when leading portion tunnel, composite perforator is detonated, if monitoring device monitor when leading portion roadway's sides or roof and floor draw
Quick-fried front and back shifts near deflection more than or equal to 1000mm, then increases the drillable length in adjacent latter section of tunnel, drillable length lengthens
Amount is (deflection * 3)/4, up to being detonated when leading portion roadway's sides and roof and floor shift near deflection and stop less than 1000mm
Increase the drillable length in latter section of tunnel.
2. underground coal mine oriented perforating pressure break according to claim 1 cuts top release shield lane method, which is characterized in that every section
The length in tunnel is 30-50m.
3. underground coal mine oriented perforating pressure break according to claim 2 cuts top release shield lane method, which is characterized in that every
In section tunnel, monitoring device (9) arranges one every 2 ~ 3m.
4. underground coal mine oriented perforating pressure break according to claim 1 or 2 or 3 cuts top release shield lane method, feature exists
In the angle, θ of drilling (4) and back plane is 60 ~ 80 °, and the spacing L of drilling (4) is 1.5 ~ 2m.
5. underground coal mine oriented perforating pressure break according to claim 4 cuts top release shield lane method, which is characterized in that drilling
(4) sealing section (5) length is the 1/4 of drillable length.
6. underground coal mine oriented perforating pressure break according to claim 5 cuts top release shield lane method, which is characterized in that compound
Every meter of 800 ~ 900g of gunpowder dose in perforator, 10/m of perforating bullet density.
7. underground coal mine oriented perforating pressure break according to claim 1 or 2 or 3 cuts top release shield lane method, feature exists
In if working face (1) two sides tunnel (3) is close to close on goaf (2), arrangement is bored in working face (1) two sides tunnel (3)
Hole carries out combined perforation fracturing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493783.4A CN110259447A (en) | 2019-06-07 | 2019-06-07 | Underground coal mine oriented perforating pressure break cuts top release shield lane method |
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|---|---|---|---|
| CN201910493783.4A CN110259447A (en) | 2019-06-07 | 2019-06-07 | Underground coal mine oriented perforating pressure break cuts top release shield lane method |
Publications (1)
| Publication Number | Publication Date |
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| CN110259447A true CN110259447A (en) | 2019-09-20 |
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|---|---|---|---|
| CN201910493783.4A Pending CN110259447A (en) | 2019-06-07 | 2019-06-07 | Underground coal mine oriented perforating pressure break cuts top release shield lane method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794748A (en) * | 2020-07-13 | 2020-10-20 | 大同煤矿集团有限责任公司 | Method for cutting hard top plate by composite blasting |
| CN111810164A (en) * | 2020-07-13 | 2020-10-23 | 大同煤矿集团有限责任公司 | Hard roof cutting method based on perforation and hydraulic fracturing |
| CN112160792A (en) * | 2020-08-31 | 2021-01-01 | 太原理工大学 | Staged hydraulic fracturing working method for underground hard top plate |
| CN112483175A (en) * | 2020-11-23 | 2021-03-12 | 中国矿业大学 | Method for evaluating influence of mine surface slag pile on stability of underground roadway |
| CN112682020A (en) * | 2021-02-03 | 2021-04-20 | 山西晋城无烟煤矿业集团有限责任公司 | Directional fracturing method for weakening hard top plate along working face |
| CN112696185A (en) * | 2021-01-28 | 2021-04-23 | 太原理工大学 | Composite blasting high-energy gas directional accurate fracturing method |
| CN113863927A (en) * | 2021-10-12 | 2021-12-31 | 安徽理工大学 | Method for pre-topping and pressure relief of coal seam working face end mining |
| CN114215530A (en) * | 2021-11-29 | 2022-03-22 | 中国矿业大学 | Rapid roadway driving method for hard roof directional hydraulic fracturing gob-side roadway |
| CN117967313A (en) * | 2024-03-29 | 2024-05-03 | 华能煤炭技术研究有限公司 | Overhead roof-hanging and roof-breaking method for temporary tunnel |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810164B (en) * | 2020-07-13 | 2022-05-31 | 晋能控股煤业集团有限公司 | Hard roof cutting method based on perforation and hydraulic fracturing |
| CN111810164A (en) * | 2020-07-13 | 2020-10-23 | 大同煤矿集团有限责任公司 | Hard roof cutting method based on perforation and hydraulic fracturing |
| CN111794748A (en) * | 2020-07-13 | 2020-10-20 | 大同煤矿集团有限责任公司 | Method for cutting hard top plate by composite blasting |
| CN112160792A (en) * | 2020-08-31 | 2021-01-01 | 太原理工大学 | Staged hydraulic fracturing working method for underground hard top plate |
| CN112160792B (en) * | 2020-08-31 | 2022-12-30 | 太原理工大学 | Staged hydraulic fracturing working method for underground hard top plate |
| CN112483175A (en) * | 2020-11-23 | 2021-03-12 | 中国矿业大学 | Method for evaluating influence of mine surface slag pile on stability of underground roadway |
| CN112483175B (en) * | 2020-11-23 | 2021-11-05 | 中国矿业大学 | Method for evaluating influence of mine surface slag pile on stability of underground roadway |
| CN112696185A (en) * | 2021-01-28 | 2021-04-23 | 太原理工大学 | Composite blasting high-energy gas directional accurate fracturing method |
| CN112682020A (en) * | 2021-02-03 | 2021-04-20 | 山西晋城无烟煤矿业集团有限责任公司 | Directional fracturing method for weakening hard top plate along working face |
| CN113863927A (en) * | 2021-10-12 | 2021-12-31 | 安徽理工大学 | Method for pre-topping and pressure relief of coal seam working face end mining |
| CN113863927B (en) * | 2021-10-12 | 2023-10-24 | 安徽理工大学 | Method for pre-cutting roof and releasing pressure of coal seam working face |
| CN114215530A (en) * | 2021-11-29 | 2022-03-22 | 中国矿业大学 | Rapid roadway driving method for hard roof directional hydraulic fracturing gob-side roadway |
| CN114215530B (en) * | 2021-11-29 | 2024-04-19 | 中国矿业大学 | Rapid roadway digging method for directional hydraulic fracturing gob-side roadway of hard top plate |
| CN117967313A (en) * | 2024-03-29 | 2024-05-03 | 华能煤炭技术研究有限公司 | Overhead roof-hanging and roof-breaking method for temporary tunnel |
| CN117967313B (en) * | 2024-03-29 | 2024-05-28 | 华能煤炭技术研究有限公司 | Overhead roof-hanging and roof-breaking method for temporary tunnel |
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Application publication date: 20190920 |