CN103397900B - Multi-hole cooperative pressure pumping integrated gas extraction method - Google Patents
Multi-hole cooperative pressure pumping integrated gas extraction method Download PDFInfo
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- CN103397900B CN103397900B CN201310303328.6A CN201310303328A CN103397900B CN 103397900 B CN103397900 B CN 103397900B CN 201310303328 A CN201310303328 A CN 201310303328A CN 103397900 B CN103397900 B CN 103397900B
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- 238000005086 pumping Methods 0.000 title claims abstract description 49
- 238000000605 extraction Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000007796 conventional method Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 230000005514 two-phase flow Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A multi-hole cooperative pressure pumping integrated gas extraction method is suitable for gas extraction operation of a high-gas low-permeability coal seam. Firstly, uniformly and alternately constructing a plurality of fracturing holes and gas extraction holes in a coal seam on a roadway side according to row-column intervals. And sealing all the fracturing holes according to the requirement that the minimum pressure capable of being borne is 20MPa, and sealing all the gas extraction holes according to a conventional method. And connecting the gas extraction holes adjacent to the fracturing hole with an underground gas extraction pipeline. And fracturing each fracturing hole by adopting a gas-liquid two-phase flow fracturing medium one by one, and performing gas extraction on all gas extraction holes adjacent to the fracturing hole while fracturing so as to realize the multi-hole cooperative pressure extraction integrated gas extraction. The invention has the advantages of low construction cost, good effect and wide practicability.
Description
Technical field
The present invention relates to a kind of porous to work in coordination with pressure and take out integrated gas pumping method, belong to underground coal mine regional gas control technical field, be particularly useful for the gas pumping operation that high gassy and low permeability coal seam carries out.
Background technology
Gas explosion and coal and gas prominent accident are the major casualties of underground coal mine, and national control of coalmine gas policy determination highly gassy mine first must be taken out and adopt afterwards, and gas pumping is the measure of effecting a permanent cure.The characteristics such as China's coal seam ubiquity low-permeable, low adsorbed gas saturation ratio, most coal bed gas extraction weak effect, up to standard for realizing extraction, anti-reflection measure must be implemented to coal seam.In recent years, various irrigation measure is applied in control of coalmine gas process, serves certain effect, but waterpower measure is single, is combined not tight, there is mash gas pumping drilling and arrange the phenomenons such as unreasonable with gas pumping.Publication number be CNIO1614134A and CNIO1614135A disclosed to bore, quick-fried, take out Trinity pressure-relief outburst-prevention method and brill, quick-fried, take out Trinity gas pumping method, adopt the mode that shot hole and gas pumping hole are alternately arranged, but adopt the order of first explosion extraction again in these two kinds inventions, do not form the synergy in shot hole and gas pumping hole, and employing blasting method, risk is comparatively large, easily causes the Gas Disasters such as gas explosion.And existing various release is anti-reflection measure complicated construction technique, cost is high.Coal seam is anti-reflection and gas pumping exists blindness, and scientifically can not carry out formulation and the enforcement of measure, cause coal seam pressure relief insufficient, gas pumping does not reach ideal effect, both wastes manpower and materials, does not reach again desirable effect.In order to solve the technical barrier of the anti-reflection blindness in coal seam in existing measure and gas pumping weak effect, be badly in need of finding a kind of new coal seam pressure relief permeability-increasing gas pumping method.
Summary of the invention
Technical problem: the object of the invention is to overcome problems of the prior art, provides a kind of porous simple to operate, that cost is low, effective to work in coordination with pressure and takes out integrated gas pumping method.
Technical scheme: porous of the present invention is worked in coordination with pressure and taken out integrated gas pumping method, be included in lane to help column pitch by row and evenly alternately to construct to coal seam multiple pressure break hole and gas pumping hole, all bore diameters are 90 ~ 120mm, and length is 80 ~ 100m, comprise the steps:
A. be that the requirement of 20MPa carries out sealing of hole to all pressure break holes by the minimum pressure that can bear, and according to a conventional method sealing of hole carried out to all gas pumping holes;
B. gas pumping hole adjacent for pressure break hole is connected with underground gas extraction pipeline;
C. adopt biphase gas and liquid flow pressure break medium to carry out pressure break to each pressure break hole one by one, while pressure break, gas pumping is carried out in all gas pumping holes adjacent to this pressure break hole, realizes porous and works in coordination with pressure and take out integrated gas pumping.
Described line space of evenly alternately constructing multiple pressure break hole and gas pumping hole is 1 ~ 3m, and column pitch is 5 ~ 10m; Described biphase gas and liquid flow pressure break medium is mixed according to the volume ratio of 1:1 by nitrogen, water.
Beneficial effect: the present invention adopts porous to work in coordination with pressure and takes out integrated gas pumping method, help column pitch by row evenly alternately to construct to coal seam multiple pressure break hole and gas pumping hole in lane, while pressure break is carried out to pressure break hole, mash gas extraction is carried out to gas pumping hole, there is provided coal seam in pressure break hole and drive gas normal pressure, meanwhile, gas pumping hole provides extraction negative pressure to coal-bed gas, act on while malleation and negative pressure, be more conducive to the desorb of gas, diffusion and infiltration.Achieve the formation of fracture network in coal body, in fracture zone, fracture network is fully through, and gas permeability of coal seam significantly improves.Solve due to boring arrange not in place and produce fracture network form difficulty, the technical barrier of coal seam pressure relief antireflective effect difference.And, adopt biphase gas and liquid flow pressure break medium, decrease the plugging action of moisture to gas.Its construction technology is simple, cost is low, effective, there is extensive practicality.
Accompanying drawing explanation
Fig. 1 is that porous of the present invention is worked in coordination with pressure and taken out integrated gas pumping cloth hole schematic diagram.
In figure: 1-pressure break hole, 2-gas pumping hole, 3-coal seam.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Porous of the present invention is worked in coordination with pressure and is taken out integrated gas pumping method: first help column pitch by row in lane and evenly alternately to construct to coal seam 3 multiple pressure break hole 1 and gas pumping hole 2, as shown in Figure 1, all bore diameters are 90 ~ 120mm, and length is 80 ~ 100m.Send into seamless steel pipe in the forward direction pressure break hole of drilling and sealing as pressure break pipe, in gas pumping hole, send into pvc pipe as gas pumping pipe, seamless steel pipe diameter is 25mm, and pvc pipe diameter is 50mm.Be that the requirement of 20MPa carries out sealing of hole to all pressure break holes 1 by the minimum pressure that can bear, and according to a conventional method sealing of hole carried out to all gas pumping holes 2; Pvc pipe in gas pumping hole 2 adjacent for pressure break hole 1 is connected with underground gas extraction pipeline, biphase gas and liquid flow pressure break medium is adopted to carry out pressure break by seamless steel pipe to each pressure break hole 1 one by one, while pressure break, gas pumping is carried out in all gas pumping holes 2 adjacent to this pressure break hole 1, realizes porous and works in coordination with pressure and take out integrated gas pumping.Described line space of evenly alternately constructing multiple pressure break hole 1 and gas pumping hole 2 is 1 ~ 3m, and column pitch is 5 ~ 10m.Described biphase gas and liquid flow pressure break medium is mixed according to the volume ratio of 1:1 by nitrogen, water.
Claims (1)
1. a porous is worked in coordination with pressure and is taken out integrated gas pumping method, be included in lane to help column pitch by row and evenly alternately to construct multiple pressure break hole (1) and gas pumping hole (2) to coal seam (3), all bore diameters are 90 ~ 120mm, length is 80 ~ 100m, it is characterized in that comprising the steps:
A. be that the requirement of 20MPa carries out sealing of hole to all pressure break holes (1) by the minimum pressure that can bear, and according to a conventional method sealing of hole carried out to all gas pumping holes (2); Described line space of evenly alternately constructing multiple pressure break hole (1) and gas pumping hole (2) is 1 ~ 3m, and column pitch is 5 ~ 10m;
B. gas pumping hole (2) adjacent to pressure break hole (1) is connected with underground gas extraction pipeline;
C. adopt biphase gas and liquid flow pressure break medium to carry out pressure break to each pressure break hole (1) one by one, while pressure break, all gas pumping holes (2) adjacent to this pressure break hole (1) carry out gas pumping, realize porous and work in coordination with pressure and take out integrated gas pumping.
2
.porous according to claim 1 is worked in coordination with pressure and is taken out integrated gas pumping method, it is characterized in that: described biphase gas and liquid flow pressure break medium is mixed according to the volume ratio of 1:1 by nitrogen, water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310303328.6A CN103397900B (en) | 2013-07-15 | 2013-07-15 | Multi-hole cooperative pressure pumping integrated gas extraction method |
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| CN201310303328.6A CN103397900B (en) | 2013-07-15 | 2013-07-15 | Multi-hole cooperative pressure pumping integrated gas extraction method |
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| Publication Number | Publication Date |
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| CN103397900A CN103397900A (en) | 2013-11-20 |
| CN103397900B true CN103397900B (en) | 2015-06-10 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314605B (en) * | 2014-08-15 | 2016-04-13 | 中国矿业大学 | A kind of multistage gas explosion fracturing coal body enhanced gas extraction method in boring |
| CN104405434B (en) * | 2014-11-18 | 2018-03-09 | 山西潞安矿业(集团)有限责任公司 | A kind of method and its device of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal |
| CN105041368A (en) * | 2015-07-13 | 2015-11-11 | 陕西纳通机械科技有限公司 | Coal bed deep hole nitrogen injection fireproof method |
| CN105134284B (en) | 2015-08-03 | 2017-05-31 | 中国矿业大学 | One kind is based on horizontal orientation drilling liquid nitrogen circulating freezing resistance anti-reflection mash gas extraction method |
| CN105064967A (en) * | 2015-08-10 | 2015-11-18 | 中国矿业大学 | Coal seam gas fracturing and mash gas driving method |
| CN105840164B (en) * | 2016-03-18 | 2018-07-10 | 河南理工大学 | A kind of method of region Depressurized mining coal bed gas |
| CN106150540B (en) * | 2016-07-01 | 2018-05-22 | 重庆市能源投资集团科技有限责任公司 | Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured |
| CN109113784B (en) * | 2018-09-20 | 2023-09-15 | 中国矿业大学 | Coal seam gas extraction-water injection coupling device and method |
| CN114396244B (en) * | 2021-12-21 | 2023-10-31 | 重庆大学 | Method for extracting gas by up-and-down combined permeability-increasing of deep coal seam group well |
| CN114251080A (en) * | 2021-12-28 | 2022-03-29 | 中国矿业大学 | Controllable detonation pressure uniform pressure relief permeability increasing method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1125387A1 (en) * | 1983-06-01 | 1984-11-23 | Институт Горного Дела Ан Казсср | Method of degassing coal seams |
| CN101144389A (en) * | 2007-04-06 | 2008-03-19 | 中国矿业大学 | Gridding type layer-through drilling pore group permeability-increasing gas pumping method |
| CN102022134A (en) * | 2010-11-16 | 2011-04-20 | 郑州大学 | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
| CN102155254A (en) * | 2011-02-28 | 2011-08-17 | 中国矿业大学 | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection |
| CN102536305A (en) * | 2012-03-06 | 2012-07-04 | 中国矿业大学 | Method for increasing permeability of inert gas and extracting gas |
| CN102966372A (en) * | 2012-12-17 | 2013-03-13 | 中国矿业大学 | Slotting induced-flow pressure-relief anti-reflection method for complicated seam |
| CN103075180A (en) * | 2013-01-15 | 2013-05-01 | 中国矿业大学 | Gas-liquid two-phase jet slotting system and method |
-
2013
- 2013-07-15 CN CN201310303328.6A patent/CN103397900B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1125387A1 (en) * | 1983-06-01 | 1984-11-23 | Институт Горного Дела Ан Казсср | Method of degassing coal seams |
| CN101144389A (en) * | 2007-04-06 | 2008-03-19 | 中国矿业大学 | Gridding type layer-through drilling pore group permeability-increasing gas pumping method |
| CN102022134A (en) * | 2010-11-16 | 2011-04-20 | 郑州大学 | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
| CN102155254A (en) * | 2011-02-28 | 2011-08-17 | 中国矿业大学 | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection |
| CN102536305A (en) * | 2012-03-06 | 2012-07-04 | 中国矿业大学 | Method for increasing permeability of inert gas and extracting gas |
| CN102966372A (en) * | 2012-12-17 | 2013-03-13 | 中国矿业大学 | Slotting induced-flow pressure-relief anti-reflection method for complicated seam |
| CN103075180A (en) * | 2013-01-15 | 2013-05-01 | 中国矿业大学 | Gas-liquid two-phase jet slotting system and method |
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| CN103397900A (en) | 2013-11-20 |
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