Study on Effective Radius of Gas in Stress-released Coal Seams by Surface Borehole
In order to accurately see about effective radius of surface drillings draining pressure relief gas of coal seam, gain reasonable parameters of the layout of ground drillings, guide scientifically and effectively gas prevention work of mining coal, this paper first of all discusses the principle of surface drillings draining pressure relief gas of coal seam. This paper basing on the theory of gas storage and flow in coal seam, the theory of exploitation of protecting coal seam, using industrial-type test and two-tracer technique, in-depth study effective radius of surface drillings draining pressure relief gas of coal seam along the orientation and the direction. The results showed that: effective radius of ground drillings draining pressure relief gas along the orientation not less than 160m and not less than 240m along the direction.
ZHANG Shuchuan
School of Energy Resources and Safety Anhui University of Science and Technology Anhui Huainan China The Key Laboratory being built by Anhui Province and Ministry of Education for Coal Mine Safety and efficient exploitation Anhui Huainan China
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
8-11
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）