CN107152303A - A kind of low ventilative high gas layer is by the method for the shielding efficient unloading pressure by blasting extraction in lane - Google Patents
A kind of low ventilative high gas layer is by the method for the shielding efficient unloading pressure by blasting extraction in lane Download PDFInfo
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- CN107152303A CN107152303A CN201710543260.7A CN201710543260A CN107152303A CN 107152303 A CN107152303 A CN 107152303A CN 201710543260 A CN201710543260 A CN 201710543260A CN 107152303 A CN107152303 A CN 107152303A
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- Prior art keywords
- lane
- hole
- shielding
- blasting boreholes
- blasting
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- 238000005422 blasting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000605 extraction Methods 0.000 title abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 41
- 238000004880 explosion Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 24
- 238000005086 pumping Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000005474 detonation Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 9
- 239000011083 cement mortar Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011049 filling Methods 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002360 explosive Substances 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
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)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of low ventilative high gas layer provided by the present invention is by the method for the shielding efficient unloading pressure by blasting gas pumping in lane, pass through a parallel floor roadway of being constructed below by shielding lane coal seam, covered upwards in floor roadway and screen the construction gas pumping hole extraction of lane coal seam, 23 blast holes of construction between every group of drainage holes, water filling is detonated after blast hole powder charge, and the quantity of once detonation blast hole is not less than 6.Stress wave is formed in coal petrography using the high-pressure shocking wave of the resonance effect of multiple blast holes detonation simultaneously, and water coupling explosion generation makes coal petrography fracturing, and explosive charge produces substantial amounts of CO2And N2After the straight methane gas changed in coal seam, explosion 0.5h, water injection pipe is also connected extraction with methane gas extraction pipeline, and then realizes that low ventilative high gas layer is screened the anti-reflection extraction technology of the efficient explosion in lane, it is easy to operation.
Description
Technical field
The present invention relates to the gas pumping technical field in coal seam, and in particular to a kind of low ventilative high gas layer is by shielding lane
The method of efficient release extraction.
Background technology
China's majority mining areas have been enter into deep mining, and the crustal stress increase of deep fractures, the gas permeability in coal seam are lower, gas
The difficulty of extraction is bigger.Deep hole standing shot technology has applied widely, antireflective effect clear advantage, becomes deep low
A kind of effective technical way that ventilative coal seam is anti-reflection.
At present, by the way of being detonated more than the domestic deep hole standing shot technology used using powder charge in coal seam.Though this method
Gas pumping efficiency so can be strengthened to be greatly enhanced gas permeability of coal seam in the short time, but the continuation of extraction is poor.Especially
It is that, for soft low air permeability coal seam, in coal seam after powder charge detonation, gas pumping efficiency is only capable of lasting 2h or so, and this is obvious
The need for coal bed gas extraction can not being met.Moreover, the explosion hole count of conventional deep hole standing shot technology once detonation
Amount is few, and the main powder charge in coal seam of blast hole, and explosive payload is few, and disturbance of the explosion to coal seam is small.If blast hole accomplish water filling,
Explosion and extraction are combined, and this problem can be solved well.
In domestic published document at present, lay particular emphasis in terms of the detonation mode of explosion, the arrangement of blasting boreholes, also more
There is not the technical method for being combined blast hole with water filling, extraction.It is therefore desirable to invent one kind to realize subterranean zone property
Release that large area is anti-reflection, can realize efficient extraction technology again.
The content of the invention
(1) technical problem solved
The technical problems to be solved by the invention there is provided a kind of low ventilative high gas layer by the shielding efficient explosion in lane
The method of release extraction, to overcome coal seam charge explosion disturbance small, anti-reflection release effect difference of small, Fracture Networks coverage etc. to ask
Topic.Coal seam and floor strata is respectively formed Fracture Networks by using the mode across coal-rock interface pulse infusion shot firing, and be interconnected
Cubic network is formed, anti-reflection relief range is effectively improved.But the country does not have the regionality across coal-rock interface pulse infusion shot firing also at present
The problem of release anti-reflection method correlative study.
(2) technical scheme
To realize object above, the technical scheme that the present invention is provided is：
A kind of low ventilative high gas layer is comprised the following steps by the method for the shielding efficient gas pressure relief in lane：
1st, by one floor roadway of construction of bottom plates in shielding lane coal seam, floor roadway is located at by the underface 15 in shielding lane
~30m；1 group is constructed perpendicular to by the gas pumping hole in shielding lane, the whole hole in gas pumping hole every 7~9m in floor roadway
Position is in the range of by the both sides 20m in shielding lane；
2nd, in the 2-3 blasting boreholes of centre position construction in two adjacent groups gas pumping hole, the whole hole of each blasting boreholes
Position is in the range of by shielding 3~6m of lane both sides, and the length of normal H of each blasting boreholes borehole bottom location and roof is not less than
The 1/3 of overall thickness of coal bed.
3rd, the whole powder charges of the coal seam section of blasting boreholes, the length L of seat earth petrosal foramen section powder charge is calculated as follows：
In formula, α is the angle that blasting boreholes intersect with seat earth.
4th, the step of blasting boreholes powder charge, sealing of hole are with detonation is as follows：
(1) 2~3 anti-skidding steel wires are penetrated into explosion powder column, and by explosion powder column and return pipe one that external diameter is 6~9mm
With the bottom hole for delivering to blast hole；
(2) water injection pipe is stretched into blast hole at 10~12m, and Grouting Pipe is stretched into blast hole at 3~4m；
(3) cement mortar is injected into blasting boreholes using Grouting Pipe, carries out returning slurry operation using water injection pipe；When explosion is bored
After cement mortar solidification in hole, water is injected into blasting boreholes using water injection pipe, carries out returning water operation using return pipe；
(4) while 6~8 blasting boreholes are detonated.
(3) beneficial effect
A kind of low ventilative high gas layer provided by the present invention is by the method for the shielding efficient unloading pressure by blasting extraction in lane, operation
Easy, easily realization.The resonance effect that this method is detonated simultaneously using multiple blast holes, and the height that water coupling explosion is produced
Pressure shock wave forms stress wave in coal petrography makes coal petrography formation Fracture Networks, and it is interconnected form cubic network, meanwhile, explosive
Blast produces substantial amounts of CO2And N2The straight methane gas changed in coal seam, increase effectively the length and scope in crack.Energy of the present invention
Realize the regional anti-reflection of lower permeability seam, release and depositing dust.
Brief description of the drawings
Fig. 1 is borehole pattern of the invention；
Fig. 2 arranges profile for the drilling of the present invention；
Fig. 3 is blast hole sealing of hole schematic diagram of the invention.
In figure：
1st, by shielding lane；2nd, floor roadway；3rd, gas pumping hole；4th, blast hole；5th, allowed for use in coal mines explosion powder column；6th, water is returned
Pipe；7th, anti-skidding steel wire；8th, water injection pipe；9th, Grouting Pipe；10th, extraction pipeline.
Embodiment
The present invention will be further described below：
A kind of low ventilative high gas layer is comprised the following steps by the method for the shielding efficient gas pressure relief in lane：
1st, by one floor roadway of construction of bottom plates in shielding lane coal seam, floor roadway is parallel to each other with being screened lane,
Every 7~9m constructs one group perpendicular to by 5~7, the gas pumping hole in shielding lane, the whole hole position of every group of drainage holes in floor roadway
Put by shielding each 20m in lane both sides in the range of, each gas pumping hole stop when penetrating roof bore, whole pitch of holes be 6~
9m.After every group of drainage holes construction is finished, stubble extraction is closed after lower drainage tube injection hole sealing.
2nd, 2 blast holes of construction in the middle of every group of gas pumping hole, the borehole bottom location of each blast hole is by shielding lane two
In the range of side 3~6m of outside, the length of normal H of each blasting boreholes borehole bottom location and roof is not less than the 1/ of overall thickness of coal bed
3~1/2.
3rd, coal seam section whole powder charges of the allowed for use in coal mines explosion powder column to blasting boreholes using diameter not less than 63mm, coal seam
The length L of bottom plate petrosal foramen section powder charge is calculated as follows：
In formula, α is the angle that blasting boreholes intersect with seat earth.
4th, after blast hole powder charge, sealing of hole, water filling detonation, the method for blast hole mash gas extraction is as follows：
(1) external diameter is tied together for 6~9mm return pipe with a section allowed for use in coal mines explosion powder column with adhesive tape, in explosion
Powder column side is inserted after anti-skidding steel wire, explosion powder column is sent to together with return pipe with inspecting hole pipe the bottom hole of blast hole, then
Required explosion powder column is sequentially sent to, finally loads big gun head, built-in two hair of big gun head is with the other electric cap of section；
(2) water injection pipe is sent into hole at 10~12m；
(3) Grouting Pipe is sent into 3~4m in hole, using conventional method for sealing by after blasting boreholes port closing, utilizes note
Slurry pipe injects cement mortar into blasting boreholes, until water injection pipe returns slurry and stops slip casting；
(4) after the cement mortar of all blast holes solidifies 48h, the water filling into blast hole using water injection pipe, until returning water
Pipe is returned after water, closes water filling tube valve；
(5) the explosion hole number of once detonation is 6~8, and all blast holes are used with the other electric cap direct initiation of section
Mode, blasting network uses series system, and detonation is provided by safety regulations in coal mine after detection network resistance is qualified；
(6) after detonation 0.5h, water injection pipe is connected progress gas pumping with extraction pipeline.
For lower permeability seam, more dried in general coal seam, gas bearing capacity is higher.When using single borehole explosion,
Plasting damage effect is small, is only capable of producing crack in smaller range around drilling.For relatively soft coal seam, when explosion powder column is placed on
When carrying out explosion in coal seam, antireflective effect is often only capable of the persistently extremely short time, is generally less than 2 hours.And use bottom plate explosion
Such issues that then can preferably avoid, first, can produce blasting crack, these cracks can connect after bottom plate explosion in floor strata
There is provided the passage of gas migration to drilling in logical coal seam；Secondly, the powder column explosion in petrosal foramen and coal hole can be produced to the coal seam of top
Greatly shock effect, forces coal body to produce displacement, realizes zonal loose.It is a large amount of in injection hole before explosion
Water, concentrates the energy of powder column explosion and passes to surrounding rock body, substantially increase capacity usage ratio, it is to avoid energy loss is right
In the crushing of rock mass excessively.Moreover, the moisture noted before downhole explosion is pressed into coal seam by blast action, depositing dust has been effectively played
Effect.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of low ventilative high gas layer is by the method for the shielding efficient pressure relief gas pumping mining in lane, it is characterised in that including as follows
Step：
(1) by shielding lane coal seam one floor roadway of construction of bottom plates, floor roadway be located at by shielding lane underface 15~
30m；
(2) 1 group is constructed perpendicular to by the gas pumping hole in shielding lane, the end in gas pumping hole every 7~9m in floor roadway
Hole site is in the range of by the both sides 20m in shielding lane；
(3) in the 2-3 blasting boreholes of centre position construction in two adjacent groups gas pumping hole, the borehole bottom location of each blasting boreholes
In the range of by shielding 3~6m of lane both sides, the length of normal H of each blasting boreholes borehole bottom location and roof is not less than coal seam
The 1/3 of gross thickness.
2. the method that a kind of low ventilative high gas layer according to right 1 is screened the efficient pressure relief gas pumping mining in lane, its
It is characterised by, the step of described blasting boreholes powder charge, sealing of hole are with detonation is as follows：
(1) 2~3 anti-skidding steel wires are penetrated into explosion powder column, and explosion powder column is together sent with external diameter for 6~9mm return pipe
To the bottom hole of blast hole；
(2) water injection pipe is stretched into blast hole at 10~12m, and Grouting Pipe is stretched into blast hole at 3~4m；
(3) cement mortar is injected into blasting boreholes using Grouting Pipe, carries out returning slurry operation using water injection pipe；When in blasting boreholes
Cement mortar solidification after, water is injected into blasting boreholes using water injection pipe, using return pipe carry out return water operation；
(4) while 6~8 blasting boreholes are detonated.
3. the method that a kind of low ventilative high gas layer according to right 1 is screened the efficient pressure relief gas pumping mining in lane, its
It is characterised by, the petrosal foramen section loaded length L of described blasting boreholes is calculated as follows：
<mrow>
<mi>L</mi>
<mo>=</mo>
<mfrac>
<mn>4</mn>
<mrow>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mi>&alpha;</mi>
</mrow>
</mfrac>
<mrow>
<mo>(</mo>
<mi>m</mi>
<mo>)</mo>
</mrow>
</mrow>
In formula, α is the angle that blasting boreholes intersect with seat earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543260.7A CN107152303A (en) | 2017-07-05 | 2017-07-05 | A kind of low ventilative high gas layer is by the method for the shielding efficient unloading pressure by blasting extraction in lane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543260.7A CN107152303A (en) | 2017-07-05 | 2017-07-05 | A kind of low ventilative high gas layer is by the method for the shielding efficient unloading pressure by blasting extraction in lane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107152303A true CN107152303A (en) | 2017-09-12 |
Family
ID=59796549
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|---|---|---|---|
| CN201710543260.7A Pending CN107152303A (en) | 2017-07-05 | 2017-07-05 | A kind of low ventilative high gas layer is by the method for the shielding efficient unloading pressure by blasting extraction in lane |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816365A (en) * | 2017-10-25 | 2018-03-20 | 中国矿业大学 | A kind of quick-fried pumping integration anti-burst method of coal seam drilling |
| CN108301832A (en) * | 2018-01-31 | 2018-07-20 | 大连海事大学 | It is a kind of to protect the quiet quick-fried device of the liquid carbon dioxide of splashing and quiet quick-fried construction method |
| CN108301866A (en) * | 2018-04-16 | 2018-07-20 | 中煤科工集团西安研究院有限公司 | Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method |
| CN109236352A (en) * | 2018-09-20 | 2019-01-18 | 中国矿业大学 | A kind of region anti-burst method of explosion hydraulic fracturing integration gas displacement |
| CN109268060A (en) * | 2018-09-20 | 2019-01-25 | 中国矿业大学 | One kind is based on the quick-fried note integrated regional anti-burst method of strong and weak strong structure |
| CN109441526A (en) * | 2019-01-11 | 2019-03-08 | 淮南矿业(集团)有限责任公司 | A kind of protected seam gas pumping method |
| WO2019184147A1 (en) * | 2018-03-27 | 2019-10-03 | 山东科技大学 | Method for efficiently preventing impact ground pressure for low gas-permeability coal seam |
| CN110656972A (en) * | 2019-10-31 | 2020-01-07 | 郑州慧矿智能科技有限公司 | Coal roadway stripe coal seam gas extraction method based on controllable shock waves |
| CN110905588A (en) * | 2019-11-22 | 2020-03-24 | 安徽理工大学 | High-gas low-permeability coal seam coal roadway rapid tunneling method for mine |
| CN112377241A (en) * | 2020-11-10 | 2021-02-19 | 王伟 | Roof extraction roadway cross-layer drilling and presplitting blasting combined multi-branch directional hole extraction method |
| CN114165209A (en) * | 2021-11-30 | 2022-03-11 | 中国矿业大学 | Method for constructing complex seam net of coal seam step by step |
| CN115012936A (en) * | 2022-07-13 | 2022-09-06 | 安徽理工大学 | Pressure relief and danger relieving method for coal mine TBM during tunneling and coal penetration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3771600A (en) * | 1971-07-02 | 1973-11-13 | Sun Oil Co | Method of explosively fracturing from drain holes using reflective fractures |
| RU2108464C1 (en) * | 1996-04-08 | 1998-04-10 | Институт угля СО РАН | Method for sealing of degassing well |
| 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 |
| CN104594868A (en) * | 2015-01-29 | 2015-05-06 | 河南理工大学 | Multi-point control hydraulic fracturing, permeability-increasing and outburst-eliminating method |
-
2017
- 2017-07-05 CN CN201710543260.7A patent/CN107152303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3771600A (en) * | 1971-07-02 | 1973-11-13 | Sun Oil Co | Method of explosively fracturing from drain holes using reflective fractures |
| RU2108464C1 (en) * | 1996-04-08 | 1998-04-10 | Институт угля СО РАН | Method for sealing of degassing well |
| 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 |
| CN104594868A (en) * | 2015-01-29 | 2015-05-06 | 河南理工大学 | Multi-point control hydraulic fracturing, permeability-increasing and outburst-eliminating method |
Non-Patent Citations (1)
| Title |
|---|
| 张凯: "深孔预裂爆破穿层增透装药技术的实验研究", 《工程科技Ⅰ辑》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816365A (en) * | 2017-10-25 | 2018-03-20 | 中国矿业大学 | A kind of quick-fried pumping integration anti-burst method of coal seam drilling |
| CN108301832A (en) * | 2018-01-31 | 2018-07-20 | 大连海事大学 | It is a kind of to protect the quiet quick-fried device of the liquid carbon dioxide of splashing and quiet quick-fried construction method |
| CN108301832B (en) * | 2018-01-31 | 2024-05-03 | 大连海事大学 | Liquid carbon dioxide static explosion device capable of preventing splashing and static explosion construction method |
| WO2019184147A1 (en) * | 2018-03-27 | 2019-10-03 | 山东科技大学 | Method for efficiently preventing impact ground pressure for low gas-permeability coal seam |
| CN108301866A (en) * | 2018-04-16 | 2018-07-20 | 中煤科工集团西安研究院有限公司 | Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method |
| CN108301866B (en) * | 2018-04-16 | 2019-05-07 | 中煤科工集团西安研究院有限公司 | Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method |
| CN109268060B (en) * | 2018-09-20 | 2020-06-16 | 中国矿业大学 | Explosion-injection integrated region outburst prevention method based on strong and weak structure |
| CN109236352A (en) * | 2018-09-20 | 2019-01-18 | 中国矿业大学 | A kind of region anti-burst method of explosion hydraulic fracturing integration gas displacement |
| CN109268060A (en) * | 2018-09-20 | 2019-01-25 | 中国矿业大学 | One kind is based on the quick-fried note integrated regional anti-burst method of strong and weak strong structure |
| CN109441526A (en) * | 2019-01-11 | 2019-03-08 | 淮南矿业(集团)有限责任公司 | A kind of protected seam gas pumping method |
| CN110656972A (en) * | 2019-10-31 | 2020-01-07 | 郑州慧矿智能科技有限公司 | Coal roadway stripe coal seam gas extraction method based on controllable shock waves |
| CN110905588A (en) * | 2019-11-22 | 2020-03-24 | 安徽理工大学 | High-gas low-permeability coal seam coal roadway rapid tunneling method for mine |
| CN112377241A (en) * | 2020-11-10 | 2021-02-19 | 王伟 | Roof extraction roadway cross-layer drilling and presplitting blasting combined multi-branch directional hole extraction method |
| CN114165209A (en) * | 2021-11-30 | 2022-03-11 | 中国矿业大学 | Method for constructing complex seam net of coal seam step by step |
| CN114165209B (en) * | 2021-11-30 | 2023-09-15 | 中国矿业大学 | Method for constructing complex seam network of coal seam step by step |
| CN115012936A (en) * | 2022-07-13 | 2022-09-06 | 安徽理工大学 | Pressure relief and danger relieving method for coal mine TBM during tunneling and coal penetration |
| CN115012936B (en) * | 2022-07-13 | 2023-03-21 | 安徽理工大学 | Pressure relief and danger relieving method for coal mine TBM during tunneling and coal penetration |
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Application publication date: 20170912 |