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Title:
ACCURATE EXTRACTION METHOD FOR COAL MINE GAS
Document Type and Number:
WIPO Patent Application WO/2018/201714
Kind Code:
A1
Abstract:
Disclosed is an accurate extraction method for a coal mine gas, for improving the accuracy of coal mine gas extraction design and construction and ensuring borehole extraction efficiency. The method comprises: firstly, using a gyroscope and an endoscopic camera to detect data about a coal seam strike and dip trends and a coal seam thickness of an extraction area; then according to standard requirements for gas extraction of an area to be extracted, designing, constructing, and tracking a borehole trajectory, and obtaining a correspondence between borehole design parameters and actual borehole trajectory parameters; next, according to the correspondence between borehole design parameters and actual borehole parameters, adjusting initial-hole parameters, so as to construct to a predetermined borehole position; then connecting the borehole to an extraction pipeline, and observing a borehole gas extraction flow and an extraction flow of gas per meter; and finally, according to adjusted borehole construction parameters and extraction data, designing and constructing other boreholes, and once borehole construction is complete, connecting the boreholes to perform gas extraction.

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Inventors:
ZHU CHUANJIE (CN)
LIN BAIQUAN (CN)
GAO ZISHAN (CN)
LU XIMIAO (CN)
Application Number:
PCT/CN2017/114363
Publication Date:
November 08, 2018
Filing Date:
December 04, 2017
Export Citation:
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Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21B47/00; E21F7/00; E21B47/002
Domestic Patent References:
WO2011000022A12011-01-06
Foreign References:
CN107100663A2017-08-29
CN102508941A2012-06-20
CN104899681A2015-09-09
CN103321629A2013-09-25
CN103184887A2013-07-03
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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