[go: up one dir, main page]

CN102635389B - Method for gas drainage from high-position roadway coal seam containing shielded soft rock - Google Patents

Method for gas drainage from high-position roadway coal seam containing shielded soft rock Download PDF

Info

Publication number
CN102635389B
CN102635389B CN201210097092.0A CN201210097092A CN102635389B CN 102635389 B CN102635389 B CN 102635389B CN 201210097092 A CN201210097092 A CN 201210097092A CN 102635389 B CN102635389 B CN 102635389B
Authority
CN
China
Prior art keywords
coal seam
drilling
drilling rod
gas drainage
coal
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.)
Expired - Fee Related
Application number
CN201210097092.0A
Other languages
Chinese (zh)
Other versions
CN102635389A (en
Inventor
潘立友
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.)
Shandong University of Science and Technology
Original Assignee
Shandong University of Science and Technology
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 Shandong University of Science and Technology filed Critical Shandong University of Science and Technology
Priority to CN201210097092.0A priority Critical patent/CN102635389B/en
Publication of CN102635389A publication Critical patent/CN102635389A/en
Application granted granted Critical
Publication of CN102635389B publication Critical patent/CN102635389B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Lining And Supports For Tunnels (AREA)

Abstract

本发明公开了一种含屏蔽软岩的高位巷煤层瓦斯抽放方法,它是在煤层开采前,在煤层顶板的硬岩层内开拓巷道,由于设计在煤层顶部所以简称高位巷,开拓好的巷道要保证围岩稳定,加强临时支护;然后在工作面开采期间,首先在工作面服务巷道内向煤层钻孔,进行初步抽放瓦斯;最后在初步抽放瓦斯的同时,在高位巷向煤层钻孔,钻孔时采用中空结构的自钻钻杆,并在自钻钻杆的进入煤层的那一段加工上小孔,钻入煤层后将自钻钻杆留在煤层钻孔中,通过自钻钻杆继续进行抽放。本发明由于在高位巷中抽放,符合瓦斯向上流动的特性,所以便于抽放。利用中空且带有小孔的钻杆抽放,不怕含屏蔽软岩封闭钻孔,抽放效果好。

The invention discloses a coal seam gas drainage method with shielding soft rock, which is to develop a roadway in the hard rock layer of the coal seam roof before the mining of the coal seam. Since it is designed on the top of the coal seam, it is called a high-level roadway for short. The developed roadway It is necessary to ensure the stability of the surrounding rock and strengthen the temporary support; then during the mining of the working face, first drill holes into the coal seam in the service roadway of the working face for preliminary gas drainage; When drilling, a self-drilling drill pipe with a hollow structure is used, and a small hole is processed on the section of the self-drilling drill pipe that enters the coal seam. After drilling into the coal seam, the self-drilling drill pipe is left in the coal seam drill hole, and the The drill pipe continues to be pumped out. The present invention is convenient for pumping because it is pumped in the high-level lane and conforms to the characteristics of gas flowing upwards. The hollow drill pipe with small holes is used for extraction, and the drilling effect is good without fear of sealing the drill hole with shielding soft rock.

Description

Containing the high-order lane coal bed gas drainage method of shielding soft rock
Technical field
The invention belongs to Coal Mining Technology field.
Background technology
It is one of new problem of coal mining that coal and gas are adopted altogether.
Gas drainage under suction at present is mainly played common boring and is carried out this extraction in the service tunnel in this coal seam.In gas drainage under suction, along with mining depth increases, the effect of gas drainage under suction and strata structure and lithology closely related.For the coal bed gas drainage poor effect of soft rock top board, be mainly that the crack of incompetent bed is easily closed at present, have shielding action, also do not find effective gas drainage method containing the coal seam of soft rock.
Therefore for the gas drainage under suction under many structures, large buried depth, the soft condition in rock stratum, need to invent a kind of effective drainage method.
Summary of the invention
The object of the invention is, for the undesirable present situation of gas drainage under suction effect that contains at present shielding soft rock, to propose a kind of extraction construction method satisfactory for result.
Technical scheme of the present invention is:
Containing a high-order lane coal bed gas drainage method for shielding soft rock, step is as follows:
The first step: the high-order lane of constructing
Before seam mining, development work in the hard formation of roof, so because design is called for short high-order lane at top, coal seam, the tunnel of having opened up will ensure adjoining rock stability, strengthens temporary lining;
Second step: conventional drilling-draining
During working face mining, first in work plane service tunnel to coal bed drilling, tentatively draw out methane;
The 3rd step: in tentatively drawing out methane, to coal bed drilling, when boring, adopt the drilling rod of brill certainly of hollow structure in high-order lane, and at aperture in that section of processing that enters coal seam of drilling rod, pierce behind coal seam and will stay in coal bed drilling from boring drilling rod, proceed extraction by drilling rod certainly.
Be made up of hollow steel tube from the structure of boring drilling rod, one meter of one joint of length, adopts and is threaded between joint and joint, is connected with drill bit and bores upper some apertures on first segment.
Good effect of the present invention is:
1, due to extraction in high-order lane, meet the characteristic that gas upwards flows, institute is so that extraction.
2, utilize hollow and be with foraminate drilling rod extraction, not being afraid of containing shielding soft rock sealing boring, extraction is effective.
Brief description of the drawings
Below in conjunction with brief description of the drawings enforcement of the present invention.
Fig. 1 is high-order lane and conventional borehole pattern;
Fig. 2 be high-order lane borehole pattern '
Fig. 3 is from boring jackrod structure schematic diagram.
Detailed description of the invention
Containing a high-order lane coal bed gas drainage method for shielding soft rock, step is as follows:
The first step: the high-order lane of constructing
Before seam mining, development work in the hard formation of roof, so because design is called for short high-order lane at top, coal seam, the tunnel of having opened up will ensure adjoining rock stability, strengthens temporary lining, and high-order lane is arranged as shown in Figure 1;
Second step: conventional drilling-draining
During working face mining, first play conventional boring in work plane service Nei Xiang coal seam, tunnel, tentatively draw out methane, boring is arranged as shown in Figure 1;
The 3rd step: in tentatively drawing out methane, in the high-order lane of top board to coal bed drilling, when boring, adopt the drilling rod of brill certainly of hollow structure, and at aperture in that section of processing that enters coal seam of drilling rod, after piercing coal seam, will stay in coal bed drilling from boring drilling rod, proceed extraction by drilling rod certainly, boring is arranged as shown in Figure 2.
From the structure of boring drilling rod as shown in Figure 3, be mainly hollow steel tube composition, one meter of one joint of length, adopts and is threaded between joint and joint, is connected with also above some apertures of brill of drill bit on first segment.

Claims (1)

1. containing a high-order lane coal bed gas drainage method for shielding soft rock, it is characterized in that, step is as follows:
The first step: the high-order lane of constructing
Before seam mining, development work in the hard formation of roof, so because design is called for short high-order lane at top, coal seam, the tunnel of having opened up will ensure adjoining rock stability, strengthens temporary lining;
Second step: conventional drilling-draining
During working face mining, first in work plane service tunnel to coal bed drilling, tentatively draw out methane;
The 3rd step: in tentatively drawing out methane, to coal bed drilling, when boring, adopt the drilling rod of brill certainly of hollow structure in high-order lane, and at aperture in that section of processing that enters coal seam of drilling rod, pierce behind coal seam and will stay in coal bed drilling from boring drilling rod, proceed extraction by drilling rod certainly;
The described drilling rod of brill is certainly made up of more piece hollow steel tube, and one meter of one joint of length adopts and be threaded between joint and joint, is connected with drill bit and bores upper multiple apertures on first segment.
CN201210097092.0A 2012-03-26 2012-03-26 Method for gas drainage from high-position roadway coal seam containing shielded soft rock Expired - Fee Related CN102635389B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210097092.0A CN102635389B (en) 2012-03-26 2012-03-26 Method for gas drainage from high-position roadway coal seam containing shielded soft rock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210097092.0A CN102635389B (en) 2012-03-26 2012-03-26 Method for gas drainage from high-position roadway coal seam containing shielded soft rock

Publications (2)

Publication Number Publication Date
CN102635389A CN102635389A (en) 2012-08-15
CN102635389B true CN102635389B (en) 2014-11-12

Family

ID=46619950

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210097092.0A Expired - Fee Related CN102635389B (en) 2012-03-26 2012-03-26 Method for gas drainage from high-position roadway coal seam containing shielded soft rock

Country Status (1)

Country Link
CN (1) CN102635389B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100292B (en) * 2014-07-31 2017-04-12 山西潞安环保能源开发股份有限公司 Regional forced gas extraction method for single low-permeability outburst thick coal seam
CN104847401A (en) * 2015-04-30 2015-08-19 贵州盘江精煤股份有限公司 Regional coal and gas outburst coal seam coal face outburst preventing and controlling method
CN108798758B (en) * 2017-04-28 2020-02-04 煤科集团沈阳研究院有限公司 Process for extracting gas from goaf and upper corner along top large-diameter bedding drill hole
CN109252888A (en) * 2018-08-15 2019-01-22 河南铁福来装备制造股份有限公司 The process of cave shielding driving is made in a kind of lane directional drilling of a coal mine high position
CN109356641A (en) * 2018-10-25 2019-02-19 四川大学 A gas extraction method for fully mechanized caving face with soft surrounding rock
CN111075502B (en) * 2020-02-18 2021-03-19 太原理工大学 Method for preventing coal mine water and gas spray holes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046786A1 (en) * 1996-06-04 1997-12-11 The University Of Queensland A drilling apparatus and method
CN101634231A (en) * 2009-05-31 2010-01-27 山西晋城无烟煤矿业集团有限责任公司 Method for reinforcing and sealing coal mine and preventing gas
CN201896632U (en) * 2010-12-10 2011-07-13 淮南矿业(集团)有限责任公司 Drilling well for gas drainage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046786A1 (en) * 1996-06-04 1997-12-11 The University Of Queensland A drilling apparatus and method
CN101634231A (en) * 2009-05-31 2010-01-27 山西晋城无烟煤矿业集团有限责任公司 Method for reinforcing and sealing coal mine and preventing gas
CN201896632U (en) * 2010-12-10 2011-07-13 淮南矿业(集团)有限责任公司 Drilling well for gas drainage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
上覆巨厚火成岩下煤与瓦斯突出灾害危险性评估与防治对策研究;罗文柯;《工程科技Ⅰ辑》;20120228(第2期);155-157 *
罗文柯.上覆巨厚火成岩下煤与瓦斯突出灾害危险性评估与防治对策研究.《工程科技Ⅰ辑》.2012,(第2期), *

Also Published As

Publication number Publication date
CN102635389A (en) 2012-08-15

Similar Documents

Publication Publication Date Title
CN103967472B (en) A kind of coal bed gas staged fracturing horizontal well enhanced gas extraction method
CN102635389B (en) Method for gas drainage from high-position roadway coal seam containing shielded soft rock
CN104131831B (en) A kind of coal bed gas well three-dimensional associating pumping method up and down
CN103510957B (en) A kind of combined type coal uncovering method
CN103306714B (en) Gas control method for drilling hole and hole three-purpose in close-range coal seam group bottom drainage roadway
CN102251760B (en) Loose bed and bedrock layer mixed water-intaking and well-forming process for geothermal well
CN103953386B (en) Upstream-blocking and downstream-seepage method for extracting gas in mining area
CN108506037A (en) Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method
CN102022133B (en) Regional gas underground high-pressure jet hole digging, pressure relief and outburst prevention method
CN107401393A (en) Water pumping gas production integration goaf gas extraction well casing programme and its construction method
CN101082283A (en) Gob-side entry retaining Y-shaped ventilation goaf roof pressure relief gas extraction method
CN102852490A (en) High gas suction and discharge process method for complex well
CN101915072A (en) Drainage method of coalbed methane in stable area by surface drilling
CN101666241A (en) Integrated drilling-blasting-pressurizing-drawing protrusion preventing method for regional gas control
CN104405281A (en) Casing drilling technique for over-goaf
CN101280687A (en) Drilling technology along top of outburst coal seam and method of eliminating blind areas in extraction
CN108301866A (en) Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method
CN104975868A (en) Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling
CN103742188B (en) Colliery drawing-off gas well and boring method
CN104847263A (en) Coal bed methane far-end butt joint horizontal well drilling method
CN108180035A (en) Gas extraction method for combined operation of drilling and permeability increasing of high-gas low-permeability coal seam
CN105804786A (en) Method for layer penetrating, drilling, pressing punching and permeability improving of soft coal seam floor
CN105986795A (en) Coal bed gas horizontal well coal bed transformation method
CN102086760B (en) Method for mining coalbed methane through regional underground high-pressure hydraulic drilling and pressure relief
CN107620581A (en) The construction method of the dual-purpose mine shaft inspection hole of one well

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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141112

Termination date: 20160326

CF01 Termination of patent right due to non-payment of annual fee