Title:
METHOD FOR IMPLEMENTING CONTINUOUS EXTRACTION OF GAS BY HIGH-POSITION DRILLING IN WORKING FACE STOPING PROCESS
Document Type and Number:
WIPO Patent Application WO/2022/242056
Kind Code:
A1
Abstract:
The present invention provides a method for implementing continuous extraction of gas by high-position drilling in a working face stoping process, comprising the following steps: (1) forming drill sites on air return roadway sides, and constructing three roadway high-position drill holes in each drill site, drill hole opening points being located on the air return roadway sides, and final hole points being located at different height positions in the area of a fracture zone of a goaf; (2) constructing a top plate high-position drill hole on a roadway top plate above each drill site, the drill hole opening points being located on the roadway top plates, and the final hole points being located in the area of the fracture zone of the goaf; (3) mounting casings and gas drainage pipes in the constructed high-position drill holes; and moreover, connecting gas concentration online monitoring devices to orifices; and (4) performing a stoping operation to continuously extract gas. According to the present invention, the high-position drill holes are arranged in a mode of combining "stubble cleaning arrangement" with "top plate hole arrangement", and final holes of the drill holes are located on different layers in the fracture zone above the goaf, such that the gas in the goaf can be detected and extracted in all directions, and the continuous extraction of the gas is ensured.
Inventors:
WANG LEI (CN)
ZHANG YONGJIANG (CN)
LIU JUN (CN)
LI SHAOBO (CN)
REN QIHAN (CN)
ZHU CHUANQI (CN)
ZHANG YONGJIANG (CN)
LIU JUN (CN)
LI SHAOBO (CN)
REN QIHAN (CN)
ZHU CHUANQI (CN)
Application Number:
PCT/CN2021/129317
Publication Date:
November 24, 2022
Filing Date:
November 08, 2021
Export Citation:
Assignee:
UNIV ANHUI SCI & TECHNOLOGY (CN)
CHONGQING RESEARCH INSTITUTE CO LTD OF CHINA COAL TECH ENGINEERING GROUP (CN)
CHONGQING RESEARCH INSTITUTE CO LTD OF CHINA COAL TECH ENGINEERING GROUP (CN)
International Classes:
E21B7/00; E21F7/00; E21B33/13; E21C41/18
Foreign References:
| CN113236340A | 2021-08-10 | |||
| CN215109009U | 2021-12-10 | |||
| CN103775127A | 2014-05-07 | |||
| CN107503790A | 2017-12-22 | |||
| CN104481540A | 2015-04-01 | |||
| RU2058484C1 | 1996-04-20 | |||
| RU2282030C1 | 2006-08-20 |
Other References:
WANG LEI: "Gas Control Scheme of 110805 Working Face in Xiaojiawa Coal Mine", COAL SCIENCE & TECHNOLOGY MAGAZINE, vol. 40, no. 1, 25 February 2019 (2019-02-25), pages 92 - 95, XP093005408, ISSN: 1008-3731, DOI: 10.19896/j.cnki.mtkj.2019.01.029
WANG LEI: "Optimization of Extraction Drilling Hole in End Mining Stage of Xiaojiawa Coal Mine", COAL SCIENCE & TECHNOLOGY MAGAZINE, vol. 41, no. 1, 25 February 2020 (2020-02-25), pages 15 - 18, XP093005413, ISSN: 1008-3731, DOI: 10.19896/j.cnki.mtkj.2020.01.006
WANG LEI: "Optimization of Extraction Drilling Hole in End Mining Stage of Xiaojiawa Coal Mine", COAL SCIENCE & TECHNOLOGY MAGAZINE, vol. 41, no. 1, 25 February 2020 (2020-02-25), pages 15 - 18, XP093005413, ISSN: 1008-3731, DOI: 10.19896/j.cnki.mtkj.2020.01.006
Attorney, Agent or Firm:
HEFEI XINGDONG INTELLECTUAL PROPERTY AGENCY CO. LTD (CN)
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