Experimental study on improving coal permeability with supercritical CO2 and low-carbon alcohol solution
The high-gas and low-permeability are the common problems of China coal mine, which restrain the mining of coal resources safely and efficiently. To solve the low permeability of coal-seam, the variation of permeability was studied experimentally with coal effected by supercritical CO2 and lowcarbon alcohol solution (including methanol solution, ethanol solution and isopropyl alcohol solution). The results show the permeability of coal after injecting supercritical CO2 is nearly one order of magnitude over former testing. This is principally resulted from that supercritical CO2 will extract some organic matters of coal substrates. Meanwhile, the permeability of sample effected by low-carbon alcohol solution is apparently higher than former experiment without solution. Moreover, the bigger volume concentration to certain low carbon alcohol solution, the greater the permeability will increase. As to the three different low-carbon alcohol solution, the isopropyl alcohol solution has a biggest influence on improving coal permeability, whereas the methanol solution has a smallest one.
coal supercritical CO2 low-carbon alcohol solution permeability
YANG Tao NIE Bai-sheng ZHAO Cai-hong LIU Xinna LI Qian
School of Resource and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083,P.R.China State Key Laboratory of Coal Resource and Safe Mining, Beijing 100083, P.R.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
447-453
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）