CN103362540A - High gas coal seam pressure relief gas extraction method - Google Patents
High gas coal seam pressure relief gas extraction method Download PDFInfo
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- CN103362540A CN103362540A CN2013103397935A CN201310339793A CN103362540A CN 103362540 A CN103362540 A CN 103362540A CN 2013103397935 A CN2013103397935 A CN 2013103397935A CN 201310339793 A CN201310339793 A CN 201310339793A CN 103362540 A CN103362540 A CN 103362540A
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Abstract
The invention discloses a high gas coal seam pressure relief gas extraction method. A plurality of water discharging gas extraction drilled holes are constructed in a water containing stratum from a rock tunnel, then the holes are sealed, water in the water containing stratum is discharged, so that moving deformation is generated on an adjacent coal stratum, the air permeability of a high gas coal seam on the lower portion of the water containing stratum is improved, meanwhile, new cracks are generated in the adjacent coal stratum, and a transportation channel for gas in the high gas coal seam to be transported to the gas extraction drilled holes is formed. After the water in the water containing stratum is completely discharged, the water discharging gas extraction drilled holes are connected with extraction pipelines, so that pressure relief gas extraction is conducted on the high gas coal seam on the lower portion. The high gas coal seam pressure relief gas extraction method is capable of greatly reducing the engineering amount of the drilled holes, remarkably improving coal seam gas extraction effect, simple, convenient to operate and remarkable in effect.
Description
Technical field
The present invention relates to a kind of pressure relief gas pumping mining method, the high gas layer pressure relief gas pumping mining method of depositing water-bearing stratum is composed on especially a kind of top, coal seam that is applicable to.
Background technology
According to " control coal and Gas Outburst regulation " and regulation, methods such as " gas pumping Tentative Measures up to standard ", for high gas layer and projecting coal bed, before exploitation, at first need to carry out gas pumping.Zone gas pumping technology comprises the topping production technique and takes out in advance two kinds of coal-bed gas technology; the major measure of wherein taking out in advance coal-bed gas is to carry out gas pumping to high gas layer construction concordant boring and layer-through drilling; reduce coal seam gas-bearing capacity, eliminate its outburst hazard.
All compose the roof position of a lot of highly gassy mines of China has the aquifer.For preventing the generation of water inrush accident, before seam mining, need to the aquifer construction boring that discharges water, and then discharge water.Find in practice not only to have eliminated the work plane flood by water-bearing stratum is discharged water, and the gas permeability in coal seam also enlarges markedly, and can give off gas from boring, this explanation has formed the crack passage that coal-bed gas pours in the boring that discharges water in the rock stratum.
By analysis, after the roof aquifer discharged water, the gas permeability in coal seam increased, and coal-bed gas and boring conducting, and its mechanism and topping are exploited similar.After the topping exploitation, because strata movement, stress reduction, cranny development be so that protected seam obtains the release antireflective effect, and the formation conducting crack interlayer rock stratum in.In like manner, water-bearing stratum just looks like topping, and the process that water-bearing stratum discharges water is equivalent to the process of topping exploitation.Water is composed to exist and is occupied certain space in the rock stratum, and the space of reserving in the rock stratum after discharging water is for movement, the distortion of lower coal rock stratum provides the space.Some aquifer is very thick, can thickly reach tens of rice.Therefore the usefull space that stays after the aquifer discharges water can be so that the lower coal rock stratum obtains sufficient movement and deformation, stress reduces and gas permeability increases, for extraction coal seam gas pressure relief provides foundation.
Summary of the invention
Technical problem: the objective of the invention is to compose for the high gas layer top board and deposit the aquifer condition, provide a kind of method simple, easy to operate high gas layer pressure relief gas pumping mining method.
Technical scheme: high gas layer pressure relief gas pumping mining method of the present invention comprises the steps:
A. at first above the corresponding water-bearing stratum of high gassy and low permeability coal seam the construction at least one stone head;
B. from stone head to water-bearing stratum a plurality of draining gas drainage boreholes of constructing, then each draining gas drainage borehole is carried out sealing of hole, and in the aperture control gate valve is installed;
C. water-bearing stratum is carried out draining, so that contiguous coal rock layer produces movement and deformation, increase the gas permeability of water-bearing stratum bottom high gas layer, make simultaneously contiguous coal rock layer produce new crack, and form high gas layer gas to the migration pathway of draining gas drainage borehole;
D. after the water-bearing stratum draining finishes, the draining gas drainage borehole is connected with the extraction pipeline, begins the high gas layer of bottom is carried out pressure relief gas pumping mining.
The spacing of wells of a plurality of draining gas drainage boreholes of described construction is determined according to field condition.
Beneficial effect: owing to adopted technique scheme, one aspect of the present invention can increase gas permeability of coal seam, shortens the gas pumping time, and the coal bed gas extraction that do not need on the other hand to construct specially boring can be saved a large amount of borehole engineering amounts.Not only can improve gas permeability of coal seam, realize coal-bed gas release extraction, and need to be in the coal seam construction drill, in roof, composing the mine of depositing water-bearing stratum, can directly to the boring of aquifer construction drainage, then carry out the aquifer and discharge water.The discharge water space of rear formation can the distortion so that the coal rock layer of bottom is moved, gas permeability increases, the coal seam release, produces new crack, and forms coal-bed gas to the migration pathway of holing.To hole after discharging water directly is connected with the extraction pipeline, just can realize the pressure relief gas pumping mining to underlying seam.This method can reduce the borehole engineering amount in a large number, significantly improves the coal bed gas extraction effect, has widely practicality.
Description of drawings
Fig. 1 is top board water-bearing stratum pressure relief gas pumping mining method schematic diagram of the present invention.
Among the figure: 1-tunnel; 2-draining extraction borehole; 3-water-bearing stratum; 4-high gas layer; 5-crack; 6-other rock stratum.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
High gas layer pressure relief gas pumping mining method of the present invention, at least one stone head 1 of construction in other rock stratum 6 above the corresponding water-bearing stratum 3 of high gassy and low permeability coal seam 4 at first, determining according to on-site actual situations, is 2 stone heads 1 shown in Fig. 1; From stone head 1 in the water-bearing stratum 3 the different a plurality of draining gas drainage boreholes 2 of construction angle, the spacing of wells of a plurality of draining gas drainage boreholes 2 of constructing is determined according to field condition, is generally 20～40m; Then each draining gas drainage borehole 2 is carried out sealing of hole, and in the aperture control gate valve is installed; Then water-bearing stratum 3 is carried out drainage works, guarantee the safety during the working face mining, and note measuring the variation ofgas density situation in the opening for drainage.Draining increases the gas permeability of water-bearing stratum 3 bottom high gas layers 4 so that contiguous coal rock layer produces movement and deformation, makes simultaneously contiguous coal rock layer produce new crack 5, and forms high gas layer 4 gas to the migration pathway of draining gas drainage borehole 2; After water-bearing stratum 3 drainings finish, draining gas drainage borehole 2 is connected with the extraction pipeline, begin the high gas layer 4 of bottom is carried out pressure relief gas pumping mining.In drainage procedure, need pressure relief gas pumping mining is measured, for the extraction work of reaching national standards provides basic data.When coal-bed gas pressure is down to 0.74MPa or gas bearing capacity is down to 8m
3When/t is following, satisfies the safely mining of coalbed condition and just can finish gas pumping work.
Claims (2)
1. a high gas layer pressure relief gas pumping mining method is characterized in that comprising the steps:
A. at first at corresponding water-bearing stratum (3) top construction at least one stone head (1) of high gassy and low permeability coal seam (4);
B. from stone head (1) to water-bearing stratum (3) construction a plurality of draining gas drainage boreholes (2), then each draining gas drainage borehole (2) is carried out sealing of hole, and in the aperture control gate valve is installed;
C. water-bearing stratum (3) is carried out draining, so that contiguous coal rock layer produces movement and deformation, increase the gas permeability of water-bearing stratum (3) bottom high gas layer (4), make simultaneously contiguous coal rock layer produce new crack (5), and form high gas layer (4) gas to the migration pathway of draining gas drainage borehole (2);
D. after water-bearing stratum (3) draining finishes, draining gas drainage borehole (2) is connected with the extraction pipeline, the high gas layer (4) that begins the bottom carries out pressure relief gas pumping mining.
2. pressure relief gas pumping mining method according to claim 1 is characterized in that: the spacing of wells of a plurality of draining gas drainage boreholes of described construction (2) is determined according to field condition.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758560A (en) * | 2014-01-14 | 2014-04-30 | 中国矿业大学 | Method for gas treatment in multiple progressive protection seam grouping regions |
| CN104453983A (en) * | 2014-11-15 | 2015-03-25 | 安徽理工大学 | Upper-fracturing lower-release permeability improvement and extraction method adopting stratum-through drilled holes for heavy-pitch coal stratum |
| CN104533511A (en) * | 2014-12-16 | 2015-04-22 | 中鼎国际工程有限责任公司 | Construction method for preventing and treating coal and gas outburst in coal roadway heading process |
| CN104533512A (en) * | 2014-12-16 | 2015-04-22 | 中鼎国际工程有限责任公司 | Construction method for preventing and treating gas outburst in coal roadway heading process |
| CN104863629A (en) * | 2015-06-11 | 2015-08-26 | 中国矿业大学 | Method for extracting gas from separation layer below overlying strata, draining water and grouting through combined drill hole |
| CN105422069A (en) * | 2015-11-30 | 2016-03-23 | 中国矿业大学 | Drilling, punching and cutting coupled pressure-relief permeability-increase method of high-gas-outburst coal seam |
| CN105673065A (en) * | 2016-01-12 | 2016-06-15 | 西安科技大学 | Method for pressure relief gas extraction of high-gas outburst coal seam |
| CN105804788A (en) * | 2016-05-16 | 2016-07-27 | 中国矿业大学 | Method for managing coalbed gas roadway |
| CN106014474A (en) * | 2016-05-17 | 2016-10-12 | 陕西正通煤业有限责任公司 | Three-hole combined construction method meeting requirements of downhole pressure releasing, water draining and prospecting and gas drainage |
| CN106837408A (en) * | 2017-03-20 | 2017-06-13 | 中国矿业大学 | A kind of coal seam stope advantage gas migration passage staged construction method |
| CN106869875A (en) * | 2017-01-05 | 2017-06-20 | 中国神华能源股份有限公司 | The method for exploiting two-layer coal bed gas |
| CN107083945A (en) * | 2017-06-13 | 2017-08-22 | 中铁十九局集团矿业投资有限公司 | A kind of roof fracturing system and its implementation |
| CN109026133A (en) * | 2018-09-30 | 2018-12-18 | 四川华蓥山龙滩煤电有限责任公司 | A kind of pumping method of the mined out absciss layer area gas pressure relief of overlength working face |
| CN109653787A (en) * | 2019-01-25 | 2019-04-19 | 安徽理工大学 | A kind of high artesian high gas layer group coordination pumping and mining pressure relief method |
| CN113006867A (en) * | 2021-04-27 | 2021-06-22 | 中国矿业大学 | Combined prevention and control method for multiple disasters before coal mining on high-gas low-lying island working face |
| CN113356918A (en) * | 2021-08-03 | 2021-09-07 | 贵州盘江精煤股份有限公司 | Method for draining gas by low-negative-pressure short-hole closure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275469A (en) * | 2008-05-12 | 2008-10-01 | 淮南矿业(集团)有限责任公司 | Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method |
| CN102383828A (en) * | 2011-07-08 | 2012-03-21 | 中国矿业大学 | Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction |
| CN102865104A (en) * | 2012-06-19 | 2013-01-09 | 淮南矿业(集团)有限责任公司 | Downward extraction drilling drainage device |
-
2013
- 2013-08-07 CN CN201310339793.5A patent/CN103362540B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275469A (en) * | 2008-05-12 | 2008-10-01 | 淮南矿业(集团)有限责任公司 | Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method |
| CN102383828A (en) * | 2011-07-08 | 2012-03-21 | 中国矿业大学 | Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction |
| CN102865104A (en) * | 2012-06-19 | 2013-01-09 | 淮南矿业(集团)有限责任公司 | Downward extraction drilling drainage device |
Non-Patent Citations (3)
| Title |
|---|
| 司春风: "下向钻孔抽采被保护层煤巷条带瓦斯的工艺技术研究", 《矿业安全与环保》 * |
| 王海锋等: "近距离上保护层开采工作面瓦斯涌出及瓦斯抽采参数优化", 《煤炭学报》 * |
| 程远平等: "保护层卸压瓦斯抽采及涌出规律研究", 《采矿与安全工程学报》 * |
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| CN103758560B (en) * | 2014-01-14 | 2015-11-18 | 中国矿业大学 | A kind of multiple topping packet zone mash gas harnessing method that goes forward one by one |
| CN103758560A (en) * | 2014-01-14 | 2014-04-30 | 中国矿业大学 | Method for gas treatment in multiple progressive protection seam grouping regions |
| CN104453983B (en) * | 2014-11-15 | 2016-04-13 | 安徽理工大学 | On a kind of half-edge coal seam layer-through drilling, anti-reflection and pumping method is let out in pressure |
| CN104453983A (en) * | 2014-11-15 | 2015-03-25 | 安徽理工大学 | Upper-fracturing lower-release permeability improvement and extraction method adopting stratum-through drilled holes for heavy-pitch coal stratum |
| CN104533511A (en) * | 2014-12-16 | 2015-04-22 | 中鼎国际工程有限责任公司 | Construction method for preventing and treating coal and gas outburst in coal roadway heading process |
| CN104533512A (en) * | 2014-12-16 | 2015-04-22 | 中鼎国际工程有限责任公司 | Construction method for preventing and treating gas outburst in coal roadway heading process |
| CN104863629A (en) * | 2015-06-11 | 2015-08-26 | 中国矿业大学 | Method for extracting gas from separation layer below overlying strata, draining water and grouting through combined drill hole |
| CN105422069A (en) * | 2015-11-30 | 2016-03-23 | 中国矿业大学 | Drilling, punching and cutting coupled pressure-relief permeability-increase method of high-gas-outburst coal seam |
| CN105422069B (en) * | 2015-11-30 | 2017-08-25 | 中国矿业大学 | A kind of high methane projecting coal bed " brill blanking " couples release anti-reflection method |
| CN105673065A (en) * | 2016-01-12 | 2016-06-15 | 西安科技大学 | Method for pressure relief gas extraction of high-gas outburst coal seam |
| CN105673065B (en) * | 2016-01-12 | 2017-12-22 | 西安科技大学 | A kind of projecting coal bed pressure relief gas pumping mining method of high methane |
| CN105804788A (en) * | 2016-05-16 | 2016-07-27 | 中国矿业大学 | Method for managing coalbed gas roadway |
| CN106014474A (en) * | 2016-05-17 | 2016-10-12 | 陕西正通煤业有限责任公司 | Three-hole combined construction method meeting requirements of downhole pressure releasing, water draining and prospecting and gas drainage |
| CN106014474B (en) * | 2016-05-17 | 2018-06-01 | 陕西正通煤业有限责任公司 | Meet underground release, leting speeper, gas drainage under suction three holes and use construction method |
| CN106869875A (en) * | 2017-01-05 | 2017-06-20 | 中国神华能源股份有限公司 | The method for exploiting two-layer coal bed gas |
| CN106869875B (en) * | 2017-01-05 | 2019-06-07 | 中国神华能源股份有限公司 | The method for exploiting two layers of coal bed gas |
| CN106837408A (en) * | 2017-03-20 | 2017-06-13 | 中国矿业大学 | A kind of coal seam stope advantage gas migration passage staged construction method |
| WO2018171254A1 (en) * | 2017-03-20 | 2018-09-27 | 中国矿业大学 | Stepped-type construction method for preferential gas migration passage of coal seam stope |
| US10472963B2 (en) | 2017-03-20 | 2019-11-12 | China University Of Mining And Technology | Method for stepwise construction of preferential gas migration pathway at stope in coal seam |
| CN107083945A (en) * | 2017-06-13 | 2017-08-22 | 中铁十九局集团矿业投资有限公司 | A kind of roof fracturing system and its implementation |
| CN109026133A (en) * | 2018-09-30 | 2018-12-18 | 四川华蓥山龙滩煤电有限责任公司 | A kind of pumping method of the mined out absciss layer area gas pressure relief of overlength working face |
| CN109653787A (en) * | 2019-01-25 | 2019-04-19 | 安徽理工大学 | A kind of high artesian high gas layer group coordination pumping and mining pressure relief method |
| CN109653787B (en) * | 2019-01-25 | 2024-05-03 | 安徽理工大学 | Coordinated extraction pressure relief method for high-pressure-bearing water and high-gas coal seam group |
| CN113006867A (en) * | 2021-04-27 | 2021-06-22 | 中国矿业大学 | Combined prevention and control method for multiple disasters before coal mining on high-gas low-lying island working face |
| CN113006867B (en) * | 2021-04-27 | 2021-12-21 | 中国矿业大学 | Combined prevention and control method for multiple disasters before coal mining on high-gas low-lying island working face |
| CN113356918A (en) * | 2021-08-03 | 2021-09-07 | 贵州盘江精煤股份有限公司 | Method for draining gas by low-negative-pressure short-hole closure |
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