Gas control technology and engineering practice for three-soft coal seam with low permeability in XuanGang region of China
Underground coal mining needs effective technical methods for the control of gas emissions in order to be able to work under safe conditions. Based on the coal seam geological conditions among the Xuangang region, a major part of theoretical research and technical development has been directed to this purpose. According to the roles of mining fractures development and relief gas flow, a novel method for the comprehensive gas drainage was proposed and engineering practiced in the mining field, which includes long drilling boreholes, oblique crossed boreholes and upper corner flexible drainage pipelines. Compared with previous gas control measurements, the total gas drainage ratio significantly enhanced from 30％ to 67.33％ (No.51109 working face) and 76.44％ (No.51105 working face). The ventilation air methane concentration of working face greatly decreased down to about 0.3％. Field tests shows that it is an effective method for gas control, which ensured the safety production of underground coal mine. The proposed gas drainage technology provides a novel approach for the three-soft coal seam gas management in China.
Gas emission Three-soft coal seam Low permeability Relief gas drainage Drilling hole
Qingzhao Li Baiquan Lin Wei Yang Cheng Zhai Zhiyong Hao
State Key Laboratory of Coal Resources and Safe Mining, Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, School of Safely Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, PR China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
579-588
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）