Study on improving gas extraction effects using technologies of drainage in downward drilling boreholes of aquifers
Gas extraction is the fundamental measures of preventing and controlling gas accidents in coal mine.In order to increase quantity of gas drainage in aquifers, this paper provides new methods to improve gas extraction effect that is by using combination of block up water grouting process and drainage in downward drilling.According to optimizing parameters of grouting to block up water and using high pressure air to extract water, methane desorption is increased as water content decreased in coal seams.Field experiments shows that gas extraction rate reaches 51.5% and gas extraction effect in downward drilling boreholes have largely improvement by carrying out these new techniques.
downward drilling boreholes gas extraction grouting automatic drainage
SHI Bi-ming MU Chao-min
School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan 232001 ,China;Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China
国际会议
International Mining Conference 2014(2014国际采矿论坛)
安徽淮南
英文
283-287
2014-09-19（万方平台首次上网日期，不代表论文的发表时间）