Experimental of mechanical properties and gas flow of containing-gas coal under different unloading speeds of confining pressure
Based on self-developed Triaxial Stress Thermalhydrological-mechanical Coal Gas Permeameter, the experiment of the influence of different unloading speeds on mechanism and gas seepage features of containing gas coal is carried out, with the condition of initial confining pressure 6MPa and gas pressure l.OMPa. It shows that: with the increasing of unloading speed of confining pressure, the time of coal maintaining at a stress plateau phase reduces, and it tends to 0, and the easier coal is to be fail After the start of unloading confining pressure, the time of coal maintaining in the stage of stress plateau showed a power function relation with unloading speed of confining pressure. In this study, the speed can be classified into three regions in text: the low speed region of unload confining pressure, the intermediate speed region and the high speed region. In the three speed regions, the confining pressure, when coal fails, is lowest in the low unloading speed of confining pressure, middle in the intermediate unloading speed region, and highest in the high unloading speed region.
mining engineering unloading speed of confining pressure permeability gas stress-strain
Changbao Jiang Guangzhi Yin Wenpu Li Qixiang Huang
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400 College of Resources and Environmental Science, Chongqing University, Chongqing 400030, 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
1160-1164
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）