CN101144389A - Gridding type layer-through drilling pore group permeability-increasing gas pumping method - Google Patents

Gridding type layer-through drilling pore group permeability-increasing gas pumping method Download PDF

Info

Publication number
CN101144389A
CN101144389A CNA2007100209977A CN200710020997A CN101144389A CN 101144389 A CN101144389 A CN 101144389A CN A2007100209977 A CNA2007100209977 A CN A2007100209977A CN 200710020997 A CN200710020997 A CN 200710020997A CN 101144389 A CN101144389 A CN 101144389A
Authority
CN
China
Prior art keywords
hole
coal seam
drilling
gas
seam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2007100209977A
Other languages
Chinese (zh)
Other versions
CN100535395C (en
Inventor
程远平
沐俊卫
王海锋
周宗勇
刘海波
王庆永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUAIBEI MINING (GROUP) CO Ltd
China University of Mining and Technology CUMT
Original Assignee
HUAIBEI MINING (GROUP) CO Ltd
China University of Mining and Technology CUMT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUAIBEI MINING (GROUP) CO Ltd, China University of Mining and Technology CUMT filed Critical HUAIBEI MINING (GROUP) CO Ltd
Priority to CNB2007100209977A priority Critical patent/CN100535395C/en
Publication of CN101144389A publication Critical patent/CN101144389A/en
Application granted granted Critical
Publication of CN100535395C publication Critical patent/CN100535395C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a grid type across-seam drilling hole multi-hole anti reflection gas extraction method. Grid type across-seam drilling hole positions are set in the coal seal area where the gas extraction is performed; the grid type across-seam drilling hole positions set are drilled with holes one by one, forming a hole group; when the hole drilling construction enters the coal seam, hole punching is performed by using high pressure water with 5 to10MPa water pressure and 10 m<SUP>3</SUP>/h flow quantity to cause the drilling hole to spray holes, to form a crack between the coal seam hole and the hole, and to increase the coal seam permeability; after the drilling hole is penetrated through the coal seam of 0.5 m, the drilling hole is escaped from a drilling rod, and is inserted into a sealing tube for hole sealing. The drilling hole is connected with an extraction tube mesh through a sealing tube, a collecting tube, a gas collection tank and a branch tube, to perform gas extraction for the coal seam. The method leads the coal seam pre-drainage efficiency to be improved to over 40 percent from the original 20 percent, realizes safe, efficient and even extraction for the sole low permeability outburst coal seam, a high gas outburst dangerous coal seam is changed to be a low gas non-outburst dangerous coal seam, and the invention has a wide practicability.

Description

The gridding type layer-through drilling pore group permeability-increasing gas pumping method
Technical field
The present invention relates to the gridding type layer-through drilling pore group permeability-increasing gas pumping method, be particularly useful for the single low ventilative projecting coal bed zonal gas pumping in colliery.
Background technology
Along with the increase of mining depth, coal-bed gas pressure and content increase, and ature of coal is soft, and gas permeability of coal seam is low, and coal-bed gas is difficult for adopting preceding extraction, and coal and gas outburst risk are on the rise, and China has become the most serious outstanding in the world producing coal country.In order before adopting, to eliminate the outburst hazard in coal seam, make high gas layer be converted into the present low gas coal seam, need to adopt regional gas pumping method.Eighties of last century the seventies, China has once tested the base plate tunnel layer-through drilling successfully in colliery, the self-sufficient and strategically located region and Zhongliangshan Coal Mine and has taken out coal-bed gas in advance and prevent coal and the outstanding regional gas pumping method of gas, and obtained application in the outstanding serious mining area of part, obtained effect.But because gas permeability of coal seam is low, cause this method extraction time long, the gas pumping rate is low, can not satisfy the needs that the Modern coal mines high-efficiency intensifying is produced.
The projecting coal bed anti-reflection measure of adopting of single low-permeable at present mainly contains deep hole presplit blasting, hydraulic slotted liner technique etc., these methods are local anti-reflection measure, directly in projecting coal bed, implement, lack enough safety curtains, there is certain potential safety hazard, and antireflective effect is limited, can not satisfy the needs that large tracts of land gas is taken out in advance.
Summary of the invention
The objective of the invention is at the problem of depositing in the prior art, a kind of gridding type layer-through drilling pore group permeability-increasing gas pumping method of safe, efficient, even extraction coal-bed gas is provided.
Gridding type layer-through drilling pore group permeability-increasing gas pumping method of the present invention:
A. set the gridding type layer-through drilling position in needs carry out the zone, coal seam of gas pumping, bore diameter is 90mm, is as the criterion with thick face in the coal seam, and the spacing of wells is 5~8m;
B. implement boring one by one to setting the gridding type layer-through drilling position, form Kong Qun;
C. after drilling construction enters the coal seam, be that 5~10MPa, flow are 10m with hydraulic pressure 3The boring spray orifice is induced in the water under high pressure punching of/h, makes between hole, coal seam and the hole and forms the crack, to increase gas permeability of coal seam;
D. after boring penetrates coal seam 0.5m, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
E. by hole sealing tube, collecting pipe, plenum chamber and arm boring is connected into the extraction pipe network, gas pumping is carried out in the coal seam, the drilling orifice negative pressure is not less than 25KPa, and the hole pumping and mining time was not less than 5 months.
Pore group permeability-increasing gas pumping method of the present invention, fully the projecting coal bed blowing characteristic of utilization is utilized high-pressure hydraulic to induce and is improved the spray orifice effect, forms the bigger loosening nip that unloads around boring, and between Kong Qun, form the conducting crack, realize zonal antireflective effect.The method is carried out operation under certain thickness security protection rock pillar shielding, can significantly improve gas permeability of coal seam, on average improves about 100 times.To be difficult to the extraction coal seam and change easy extraction coal seam into, single hole gas pumping amount on average can reach 0.0389m 3/ min, gas pumping concentration can reach 40~60%; Can also significantly improve the pre-pumping rate of coal-bed gas in the group's scope of hole, the pre-pumping rate in coal seam is brought up to more than 40% by original 20%, can not have projecting coal bed by the single low projecting coal bed present low gas that changes into of high gas of breathing freely; The driving mode of heading changes comprehensive mechanized driving into by original big gun pick, and the monthly average driving speed can be brought up to more than the 150m by 50 original~60m.Realize safe, efficient, the even extraction of the projecting coal bed gas of single low-permeable, uprising gas outburst danger coal seam is that present low gas does not have the outburst danger coal seam, has practicality widely
The specific embodiment
Gridding type layer-through drilling pore group permeability-increasing gas pumping method of the present invention: according to coal seam and gas bearing situation, utilization field trial and theoretical analysis method, optimize and determine the hole swarm parameter, in carrying out the zone, coal seam of gas pumping, needs set the gridding type layer-through drilling position, bore diameter is 90mm, be as the criterion with thick face in the coal seam, the spacing of wells is 5~8m; Safety is installed leads construction drill behind the spray drilling apparatus, treat to enable when boring penetrates coal seam 0.5m safety and lead the spray drilling apparatus; Under the effect of high-pressure hydraulic, induce the coal seam spray orifice, form crack between the hole, increase gas permeability of coal seam; Water under high pressure hydraulic pressure is that 5~10MPa, flow are 10m 3/ h, spray orifice coal amount 1~5t; Sealing of hole immediately after drilling construction finishes, sealed borehole length is not less than 10m, hole sealing tube length 12m, diameter 40mm.Incorporate the extraction pipe network into by collecting pipe, plenum chamber and arm behind the sealing of hole and in time carry out gas pumping, the drilling orifice negative pressure is not less than 25KPa, and on average finding time in advance is not less than 5 months.All the other borings are constructed according to above-mentioned steps in the Kong Qun; After boring group construction is finished, link up, the gas permeability of coal body in the group's scope of hole is improved by crack between the hole; Kong Qun is not less than 5 months extraction, can makes the regional outburst danger of eliminating in coal seam in the group's scope of hole, effectively reduce coal seam gas-bearing capacity, pre-pumping rate can reach more than 40%.

Claims (1)

1. gridding type layer-through drilling pore group permeability-increasing gas pumping method is characterized in that:
A. set the gridding type layer-through drilling position in needs carry out the zone, coal seam of gas pumping, bore diameter is 90mm, is as the criterion with thick face in the coal seam, and the spacing of wells is 5~8m;
B. implement boring one by one to setting the gridding type layer-through drilling position, form Kong Qun;
C. after drilling construction enters the coal seam, be that 5~10MPa, flow are 10m with hydraulic pressure 3The boring spray orifice is induced in the water under high pressure punching of/h, makes between hole, coal seam and the hole and forms the crack, to increase gas permeability of coal seam;
D. after boring penetrates coal seam 0.5m, withdraw from drilling rod, insert hole sealing tube and implement sealing of hole, sealed borehole length is not less than 10m, and hole sealing tube length is not less than 12m, diameter 40mm;
E. by hole sealing tube, collecting pipe, plenum chamber and arm boring is connected into the extraction pipe network, gas pumping is carried out in the coal seam, the drilling orifice negative pressure is not less than 25KPa, and the hole pumping and mining time was not less than 5 months.
CNB2007100209977A 2007-04-06 2007-04-06 Gridding type layer-through drilling pore group permeability-increasing gas pumping method Expired - Fee Related CN100535395C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100209977A CN100535395C (en) 2007-04-06 2007-04-06 Gridding type layer-through drilling pore group permeability-increasing gas pumping method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100209977A CN100535395C (en) 2007-04-06 2007-04-06 Gridding type layer-through drilling pore group permeability-increasing gas pumping method

Publications (2)

Publication Number Publication Date
CN101144389A true CN101144389A (en) 2008-03-19
CN100535395C CN100535395C (en) 2009-09-02

Family

ID=39207100

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2007100209977A Expired - Fee Related CN100535395C (en) 2007-04-06 2007-04-06 Gridding type layer-through drilling pore group permeability-increasing gas pumping method

Country Status (1)

Country Link
CN (1) CN100535395C (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100591893C (en) * 2008-05-27 2010-02-24 河南理工大学 Projecting coal bed edge top drill construction method for eliminating pumping blind zone
CN102031950A (en) * 2010-12-06 2011-04-27 煤炭科学研究总院西安研究院 Hole-forming process method for comb gas extraction borehole in coal seam roof
CN102061933A (en) * 2010-12-13 2011-05-18 山西晋城无烟煤矿业集团有限责任公司 Long drilling positioning construction process
CN102116171A (en) * 2011-04-09 2011-07-06 中铁十七局集团第五工程有限公司 Method for rapid discharge of gas in tunnel
CN102116170A (en) * 2011-01-27 2011-07-06 中国矿业大学 Method for determining grid type layer-through drilling intervals of floor roadway
CN102434194A (en) * 2011-09-30 2012-05-02 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
CN101988385B (en) * 2009-08-07 2012-07-25 中国瑞林工程技术有限公司 Ventilation method for karst water-rich mine
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
CN103306713A (en) * 2013-05-20 2013-09-18 中国矿业大学 Networking reinforcement method for cross drilling holes of outburst coal seam
CN103362541A (en) * 2013-08-07 2013-10-23 中国矿业大学 Method for locally improving coal seam air permeability in coal seam with high gas and low air permeability
CN103362538A (en) * 2013-07-15 2013-10-23 中国矿业大学 Pressure alternate gas exhausting method by slotting and fracturing coal seams
CN103397900A (en) * 2013-07-15 2013-11-20 中国矿业大学 Porous collaborative fracturing and extracting integrated gas extraction method
CN103470298A (en) * 2013-10-02 2013-12-25 河南理工大学 Design method of hole-drilling and hole-forming process scheme for drainage of outburst coal seam
CN104131832A (en) * 2014-07-14 2014-11-05 中国矿业大学 High-gas-content coal seam punching cutting pressing and sucking integral pressure relief and antireflection gas extraction method
CN105484790A (en) * 2015-11-24 2016-04-13 中国矿业大学 Method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes
CN110259378A (en) * 2019-07-03 2019-09-20 中煤科工集团重庆研究院有限公司 A kind of borehole design method eliminated the lane Di Chou layer-through drilling and take out coal seam blank tape in advance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107152305A (en) * 2017-07-25 2017-09-12 湖南科技大学 A kind of method of coal seam pre-mining drainage gas

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100356037C (en) * 2003-03-28 2007-12-19 淮南矿业(集团)有限责任公司 Low premeability high gas soft thick coal layer remote pressure relief gas exhausting method
CN100335738C (en) * 2005-11-26 2007-09-05 太原理工大学 High-pressure water jet drill bit capable of punching and cutting by switching of water pressure

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100591893C (en) * 2008-05-27 2010-02-24 河南理工大学 Projecting coal bed edge top drill construction method for eliminating pumping blind zone
CN101988385B (en) * 2009-08-07 2012-07-25 中国瑞林工程技术有限公司 Ventilation method for karst water-rich mine
CN102031950B (en) * 2010-12-06 2012-02-15 煤炭科学研究总院西安研究院 Hole-forming process method for comb gas extraction borehole in coal seam roof
CN102031950A (en) * 2010-12-06 2011-04-27 煤炭科学研究总院西安研究院 Hole-forming process method for comb gas extraction borehole in coal seam roof
CN102061933A (en) * 2010-12-13 2011-05-18 山西晋城无烟煤矿业集团有限责任公司 Long drilling positioning construction process
CN102061933B (en) * 2010-12-13 2012-10-31 山西晋城无烟煤矿业集团有限责任公司 Long drilling positioning construction process
CN102116170B (en) * 2011-01-27 2013-01-02 中国矿业大学 Method for determining grid type layer-through drilling intervals of floor roadway
CN102116170A (en) * 2011-01-27 2011-07-06 中国矿业大学 Method for determining grid type layer-through drilling intervals of floor roadway
CN102116171B (en) * 2011-04-09 2013-04-10 中铁十七局集团第五工程有限公司 Method for rapid discharge of gas in tunnel
CN102116171A (en) * 2011-04-09 2011-07-06 中铁十七局集团第五工程有限公司 Method for rapid discharge of gas in tunnel
CN102434194A (en) * 2011-09-30 2012-05-02 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
CN102434194B (en) * 2011-09-30 2015-03-11 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
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
CN103306713A (en) * 2013-05-20 2013-09-18 中国矿业大学 Networking reinforcement method for cross drilling holes of outburst coal seam
CN103362538A (en) * 2013-07-15 2013-10-23 中国矿业大学 Pressure alternate gas exhausting method by slotting and fracturing coal seams
CN103397900A (en) * 2013-07-15 2013-11-20 中国矿业大学 Porous collaborative fracturing and extracting integrated gas extraction method
CN103397900B (en) * 2013-07-15 2015-06-10 中国矿业大学 Porous collaborative fracturing and extracting integrated gas extraction method
CN103362538B (en) * 2013-07-15 2015-04-22 中国矿业大学 Pressure alternate gas exhausting method by slotting and fracturing coal seams
CN103362541B (en) * 2013-08-07 2015-11-04 中国矿业大学 High gassy and low permeability coal seam regionality increases the method for gas permeability of coal seam
CN103362541A (en) * 2013-08-07 2013-10-23 中国矿业大学 Method for locally improving coal seam air permeability in coal seam with high gas and low air permeability
CN103470298B (en) * 2013-10-02 2015-07-01 河南理工大学 Design method of hole-drilling and hole-forming process scheme for drainage of outburst coal seam
CN103470298A (en) * 2013-10-02 2013-12-25 河南理工大学 Design method of hole-drilling and hole-forming process scheme for drainage of outburst coal seam
CN104131832A (en) * 2014-07-14 2014-11-05 中国矿业大学 High-gas-content coal seam punching cutting pressing and sucking integral pressure relief and antireflection gas extraction method
CN104131832B (en) * 2014-07-14 2016-08-17 中国矿业大学 A kind of high gas layer rushes the release permeability-increasing gas pumping method of cutting, press and pumping integration
CN105484790A (en) * 2015-11-24 2016-04-13 中国矿业大学 Method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes
CN110259378A (en) * 2019-07-03 2019-09-20 中煤科工集团重庆研究院有限公司 A kind of borehole design method eliminated the lane Di Chou layer-through drilling and take out coal seam blank tape in advance

Also Published As

Publication number Publication date
CN100535395C (en) 2009-09-02

Similar Documents

Publication Publication Date Title
CN100535395C (en) Gridding type layer-through drilling pore group permeability-increasing gas pumping method
CN102619552B (en) Directional hydraulic pressing penetration, permeability increase and outburst elimination method of guide groove
CN102383828B (en) Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction
CN101575983B (en) Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof.
CN101813002B (en) Coal seam pre-splitting method based on gas extraction
CN103233738B (en) Comprehensive weakening method of top coal of heavy-pitch super high seam
CN102817603B (en) A kind of method being communicated with ground and underground coal seam gas
CN104563990A (en) Drilling and blanking integrated and heat injection coordinated enhancing method for extracting coal seam gas
CN105089493B (en) Ground vertical well combines pressure released seam gas pumping method with underground layer-through drilling
CN106014473B (en) A kind of cross borehole constrained expansion explosion network permeability-increasing gas drainage method
CN104653161A (en) Coal mine underground pulse hydraulic slot cutting-fracturing integral anti-reflection extraction device and method
CN103510958B (en) A kind of gentle dip super-high seam rock cross-cut coal uncovering
CN102635388A (en) Interaction permeability-increasing method of pre-splitting blasting and hydraulic cracking of coal seam
CN104895531A (en) Single thick coal seam ground mining well extraction process
CN105888540B (en) A kind of drilling method of drilling
CN102678166B (en) Method for increasing gas extraction rate by permeability increasing of single thick coal seam
CN204782970U (en) Low permeability coal seam water conservancy slot system
CN105134286A (en) Method for extracting gas of gob of L-shaped well
CN103498644A (en) Outburst prevention method in rock cross-cut coal uncovering and gas outburst coal seam double-curtain grouting
CN109209472A (en) The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple
CN105003294B (en) One kind is based on hydrothermal reaction coupling pressure break coal body coal uncovering method
CN102817633B (en) The device drawing out methane and the pre-splitting method of the controlled blasting of deep hole crack
CN105019935A (en) Overground/underground combined pressure relief outburst elimination coal seam rapid channel digging method
WO2020151207A1 (en) Coordinative extraction and pressure relief method for high confined water high gas coal seam group
CN202991106U (en) Drilling spraying dust-removing device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090902

Termination date: 20100406