Controlled blasting technique to improve gas pre-drainage effect in a coal mine

GONG Min; LIU Wanbo; WANG Desheng; WU Hourong; CHEN Taiming; QIU Decai

doi:10.13374/j.issn1001-053x.2006.03.005

Volume 28 Issue 3

Aug. 2021

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Article Navigation > Chinese Journal of Engineering > 2006 > 28(3): 223-226

GONG Min, LIU Wanbo, WANG Desheng, WU Hourong, CHEN Taiming, QIU Decai. Controlled blasting technique to improve gas pre-drainage effect in a coal mine[J]. Chinese Journal of Engineering, 2006, 28(3): 223-226. doi: 10.13374/j.issn1001-053x.2006.03.005

Citation:

GONG Min, LIU Wanbo, WANG Desheng, WU Hourong, CHEN Taiming, QIU Decai. Controlled blasting technique to improve gas pre-drainage effect in a coal mine[J]. Chinese Journal of Engineering, 2006, 28(3): 223-226. doi: 10.13374/j.issn1001-053x.2006.03.005

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Controlled blasting technique to improve gas pre-drainage effect in a coal mine

doi: 10.13374/j.issn1001-053x.2006.03.005

1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Sichuan Guangneng Group, Guangan 610031, China

Received Date: 2005-06-09
Rev Recd Date: 2005-06-28

Available Online: 2021-08-24

Abstract

Abstract

Gas pre-drainage is the main solution to solve gas disaster problems. The efficiency of gas pre-drainage, however, is low by far. The method of controlled blasting was investigated to improve the effect of gas pre-drainage. Such problems as safe ignition in high-gas coal bed, charging technique in a long horizontal borehole, and selection of explosives were solved. After the blasting, the amount of gas selfdrainage is more than 5 times that in the non-blasting area, the efficiency of gas pre-drainage is improved, and pre-drainage time is less than 2/3 of the original time.
- gas pre-drainage,
- controlled blasting,
- coal bed