CN100999997A - Method for drawing-out near layer gas of top-coal caving face - Google Patents
Method for drawing-out near layer gas of top-coal caving face Download PDFInfo
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- CN100999997A CN100999997A CN 200610102367 CN200610102367A CN100999997A CN 100999997 A CN100999997 A CN 100999997A CN 200610102367 CN200610102367 CN 200610102367 CN 200610102367 A CN200610102367 A CN 200610102367A CN 100999997 A CN100999997 A CN 100999997A
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Abstract
The method of pumping gas from the top working face in multipurpose coal mining with great pumping cross section, small resistance, high permeability, great gas pumping amount and good pumping effect includes excavating one exclusive gas pumping drift to the pumping target layer in the whole length of the extracting face, and embedding gas pumping pipe in permanent sealing wall and connected to the mine gas pumping system.
Description
Technical field
The present invention relates in a kind of control of coalmine gas technology, the especially comprehensive extracting and caving face method of the next layer gas in the extraction.
Background technology
Mining is a kind of coal-mining method of high-yield and high-efficiency, but the gas problem is seriously restricting fully mechanized coal face safety in production and high-yield and high-efficiency.On the basis of the existing draft type of comprehensive extracting and caving face, adopt the next layer gas in the intensive boring of minor diameter, the large diameter borehole extraction, it is descending to control the next layer gas, but because the intensive boring of minor diameter, large diameter borehole extraction section are little, resistance is big, gas permeability is poor, the amount of drawing out methane is little, the effect that draws out methane is still undesirable.
Summary of the invention
The object of the invention is exactly the deficiency that overcomes above-mentioned prior art, the method for the next layer gas in the comprehensive extracting and caving face extraction of provide that a kind of extraction section is big, resistance is little, good permeability, the amount of drawing out methane are big, effective.
The present invention climbs and runs through the work plane strike length along the stope trend to the extraction target zone from the exploiting field return air pick inclined gallery of going up a hill, and excavates the special-purpose tunnel that draws out methane.This tunnel keeps certain with stope and hangs down high, parallel with return airway and the maintenance certain distance in the stope top board, moves towards total length along stope and arranges.Near opening, do permanent fire dam, the pile things on pipe that draws out methane within the walls, system is connected with mine gas drainage.
The layout in this special-purpose tunnel that draws out methane is to go down the hill from return air to get to apart from the adjacent layer of the about 60m in coal seam with the slope of 25-30 degree, arranges to cutting the lane direction along parallel two gate road of this layer then.Arrange that layer position should be in destroying the above fissure zone of inbreak height, in the contiguous coal seam of the above 7-11 of base plate times mining height scope, because the ventilation suction function helps horizontal range to be about 1/3 of face length outside return airway.Bolt support is adopted in the tunnel, and net section is 4-6m
2
The effect of extraction the next layer gas is selected directly to influence in the draw out methane layer position in special-purpose tunnel.At first the factor that should consider is to be in adjacent layer compact district (or the next layer gas gush out compact district), and this position coal and rock cranny development, in the extraction onset time, be difficult for by the rock stratum collapse fall destroy.In general, arrange too lowly, be in caving zone (or the claim caving zone) scope, can extract gas out very soon after fully mechanized coal face advances, but destroyed by the rock inbreak also very soon, link up with the goaf, drawing out methane is the low concentration goaf gas.If arrange that layer position is too high, work plane is adopted top plate pressure relief later, and gas is poured into the stope space in a large number, the weak effect that dams, extraction is untimely, promptly allows to extract out the gas of a large amount of higher concentrations, but relatively poor to making the gush out problem effect that transfinites of face gas on solving, can not guarantee working surface production safety.
The present invention is the method that a kind of reinforcement draws out methane.In comprehensive extracting and caving face, by the setting special-purpose tunnel that draws out methane, can extraction the gas pressure relief in the contiguous coal rock layer on it, control top gas gushing out as much as possible with the state of high negative pressure to stope.The inventive method extraction section is big, resistance is little, good permeability, the amount of drawing out methane are big, effective.Both guarantee to extract out in a large number gas, and can keep a suitable segment distance not to be destroyed later in the advance of the face again, thereby guaranteed to do one's best the extraction the next layer gas.
Description of drawings
Fig. 1 is the draw out methane section arrangement diagram in special-purpose tunnel of the present invention.
Among the figure: 1, the special-purpose tunnel that draws out methane, 2, the coal seam, 3, open-off cut.
The specific embodiment
The main coal-bearing strata in mining area, Yangquan is Taiyuan group and dyas Shanxi group, mining area gross area 1105Km
2, 107.3 hundred million tons of oils in place, the about 180m of coal measure strata gross thickness, overall thickness of coal bed 13-15m, apart from face of land degree of depth 150-500m, seam inclination is generally the 5-10 degree, and the mining area contains 16 layers in coal (serial number from top to bottom) altogether, is the higher anthracite of degree of metamorphism.The average thickness 6.5m of high seam, tax is deposited stable, and the coal bed texture complexity has three layers of horsestone.High seam harder (f=2-3), sulfur content is generally between 1.37%-2.3% in the coal seam.It directly pushes up and is black arenaceous shale, thick 0-6.5m; Old top is limestone, and top is mud stone, sandstone alternating layers; Big of its base plate is the grey black arenaceous shale, and between the thick 7-12m, past is the canescence packsand.Comprehensive extracting and caving face just is arranged in No. 15 coal seams.
As the special-purpose tunnel of the next layer gas on the extraction comprehensive coal face, the collateral security effect is set out, when chosen position, should be chosen in the next layer gas gush out the compact district and satisfy that work plane adopts later can be very fast not destroyed, be in the drawing-off gas scope.Therefore, the draw out methane suitable location in special-purpose tunnel is chosen in adjacent layer comparatively dense layer position, fissure zone middle and lower part (being the above 7-11 of base plate times mining height scope).Consider lane and the factor such as easy to maintenance of tunneling into simultaneously, be chosen under No. 9, be optimal floor position in No. 10 coal seams, this floor position is positioned at adjacent layer goes up for No. 8, No. 9, under No. 9, No. 10, No. 11 K4 limestone gas compact district that gushes out, apart from about high seam top board 50-70 rice, be about 7-10 times of mining height, be in abundant absciss layer layer position, caving zone top, according to fully mechanized coal face overlying rock mechanics, balkstone release active period (work plane rear 25-129m scope), the roof destruction inbreak highly is the above 34-46.8m of base plate.The roof strata release decline phase (after the 129m of work plane rear), along with the goaf is compacted gradually, top board continuation activity, inbreak highly is the above 46.8-74.8m of base plate, in fact this layer rock be owing to collapsed by the bottom to fall the rock support effect, is orderly row and splits wholely to sink, and the degree of being damaged is little.This one deck position rock absciss layer is abundant, and it is good that water is write flat channel connectivity, is best extraction channel arrangement layer position.Consider that near about 46.8m extraction passage destructible should surpass during the extraction channel arrangement and destroy 1-1.5 times of mining height of inbreak height, therefore, reasonable Arrangement layer position is 54-74.8m on base plate.From the above 47-68m of top board, about 7-10 times of mining height layer position.
Sun coal group five ore deposits zhang eight coals, second exploiting field the 4th work plane, the special-purpose roadway arrangement that draws out methane is at about 60 meters of distance high seam top board, apart from the high seam base plate about 66.8 meters, be in more than the inbreak height (46.8 meters), mining coal-face gas sucrose extraction average 90.87%, pumping volume is big, convenient management, and the big comprehensive extracting and caving face of direct exploitation high seam gas emission, solution gas exceeding limit problem are had obvious effects.
Sun coal group one ore deposit zhang eight coals the tenth exploiting field work plane, the special-purpose roadway arrangement that draws out methane is at about 40 meters of distance high seam top board, gas sucrose extraction 82.1%, illustrate that the inventive method is in the working surface production process, controlled a large amount of the next layer gas of going up effectively and gushed out, in administering gas, played decisive role to the working surface production space.
Claims (3)
1, the method for the next layer gas in a kind of comprehensive extracting and caving face extraction is characterized in that climbing and running through the work plane strike length along the stope trend to the extraction target zone from the exploiting field return air pick inclined gallery of going up a hill, and excavates the special-purpose tunnel that draws out methane; This tunnel keeps certain with stope and hangs down high, parallel with return airway and the maintenance certain distance in the stope top board, moves towards total length along stope and arranges; Near opening, do permanent fire dam, the pile things on pipe that draws out methane within the walls, system is connected with mine gas drainage.
2, the method for the next layer gas in the comprehensive extracting and caving face extraction as claimed in claim 1, the special-purpose tunnel that it is characterized in that drawing out methane is to go down the hill from return air to get to apart from the adjacent layer of the about 60m in coal seam with the slope of 25-30 degree, arranges to cutting the lane direction along parallel two gate road of this layer then; Layout layer position should in the contiguous coal seam of the above 7-11 of base plate times mining height scope, help horizontal range to be about 1/3 of face length outside return airway in destroying the above fissure zone of inbreak height.
3, the method for the next layer gas in the comprehensive extracting and caving face extraction as claimed in claim 1 or 2 is characterized in that tunnel employing bolt support, and net section is 4-6m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200610102367 CN100999997A (en) | 2006-12-31 | 2006-12-31 | Method for drawing-out near layer gas of top-coal caving face |
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| CN 200610102367 CN100999997A (en) | 2006-12-31 | 2006-12-31 | Method for drawing-out near layer gas of top-coal caving face |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518464A (en) * | 2011-12-09 | 2012-06-27 | 中国神华能源股份有限公司 | Method for extracting gas at corner on recovery working face in coal mine |
| US8590982B2 (en) | 2009-07-10 | 2013-11-26 | Joy Mm Delaware, Inc. | Longwall mining roof supports |
| CN103437803A (en) * | 2013-08-22 | 2013-12-11 | 山西晋城无烟煤矿业集团有限责任公司 | Structure and method for gas drainage of drill holes of high-drainage drill field of coal mine |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| 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 |
| CN109488363A (en) * | 2018-11-13 | 2019-03-19 | 辽宁工程技术大学 | A kind of suction road adopts dynamic circuit connector reason method for determining position and device |
| CN112228142A (en) * | 2020-09-09 | 2021-01-15 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN112761713A (en) * | 2021-01-29 | 2021-05-07 | 太原理工大学 | Safe and long-acting gas extraction method for goaf of stoping working face of high-gas mine |
-
2006
- 2006-12-31 CN CN 200610102367 patent/CN100999997A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8590982B2 (en) | 2009-07-10 | 2013-11-26 | Joy Mm Delaware, Inc. | Longwall mining roof supports |
| CN102518464A (en) * | 2011-12-09 | 2012-06-27 | 中国神华能源股份有限公司 | Method for extracting gas at corner on recovery working face in coal mine |
| CN103437803A (en) * | 2013-08-22 | 2013-12-11 | 山西晋城无烟煤矿业集团有限责任公司 | Structure and method for gas drainage of drill holes of high-drainage drill field of coal mine |
| 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 |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| CN109488363A (en) * | 2018-11-13 | 2019-03-19 | 辽宁工程技术大学 | A kind of suction road adopts dynamic circuit connector reason method for determining position and device |
| CN112228142A (en) * | 2020-09-09 | 2021-01-15 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN112228142B (en) * | 2020-09-09 | 2022-08-05 | 郑成立 | Slow-dip coal seam roadway design and adjacent layer and goaf gas extraction method |
| CN112761713A (en) * | 2021-01-29 | 2021-05-07 | 太原理工大学 | Safe and long-acting gas extraction method for goaf of stoping working face of high-gas mine |
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