Study on law of raw coal seepage during loading process at different gas pressures

查看全文 作　　者：Meng [1,2]Junqing;Nie [1,2]Baisheng;Zhao [1,2]Bi;Ma [1,2]Yechao

机构地区：[1]School of Resource and Safety Engineering, China University of Mining and Technology (Beijing);[2]State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology

出　　处：《International Journal of Mining Science and Technology》索引2015年第25卷第1期,共5页

基　　金：supported by the Fundamental Research Funds for the Central Universities (No. 2011QZ02);the National Natural Science Foundation of China (No. 51204189);the National Basic Research Program of China (No. 2011CB201202) 摘　　要：In order to reveal the law of raw coal seepage at different gas pressures, the gravity constant load seepage experimental system was developed and used. The law of raw coal seepage at different gas pressures with He, N2 and CO2was investigated. The results show that, in a given state of stress during the experiment, with the increase of gas pressure, the permeability of raw coal sample prone to outburst exhibits a significantly decrease, and then exhibits an increasing trend when reaching the extreme point.The law of Klingberg coefficient related to the stress state and the gas adsorption properties was also obtained. Under the same experimental conditions, the Klingberg coefficient of He is greater than that of N2; and the Klingberg coefficient of CO2 has minimum value; so the stronger the gas adsorption is,the smaller the Klingberg coefficient of gas goes. Klinkenberg coefficient decreases with the increase of effective stress. Under the same conditions, the permeability of He is greater than that of N2; the permeability of CO2 has minimum value; so the stronger the gas adsorption is, the lower the permeability of the coal sample goes. The results have important significance in revealing the mechanism of gas seepage, predicting coal mine gas disaster, and gas drainage and safety production. 关键词：气压带渗流规律原煤加载过程气体压力应力状态气体吸附渗透率

相关文献

参考文献（22）
引证文献（9）
耦合文献（544）

参考文献(22)

引证文献(9)

耦合文献(544)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Study on law of raw coal seepage during loading process at different gas pressures

参考文献(22)

引证文献(9)

耦合文献(544)

用户提示