Experimental research on coalbed gas drainage effect and economy of long directional borehole in roof

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Yang, Huiming^1,2 ; Hu, Liangping^1,2

State Key Laboratory of Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing, China^1

Chongqing Research Institute Co., Ltd., China Coal Technology and Engineering Group, Chongqing, China^2

关键词: Coalbeds;    Construction period;    Cost effective;    Experimental research;    Gas drainage;    Investment costs;    Roof roadways;    Working face;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012012/pdf
DOI  :  10.1088/1755-1315/64/1/012012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the coalbed gas drainage effect and economy of long directional roof borehole, 2 boreholes were laid out in Xinji No. 2 mine to analyze its gas drainage and investment costs comparing with high position roof borehole and high position roof roadway. The result indicates that the long directional roof borehole save investment by 44.8% and shorten the construction period by 30%, comparing with high position roof roadway for controlling gas in the working face. Investment slightly less and shorten the construction period by 47.5%, comparing with the roof high position borehole. Therefore, the method of the long directional roof borehole to drain coalbed gas in working face is the most cost-effective.