Experimental Research on Electrical Parameters Variation of Loaded Coal
Experiment on electrical parameters variation of different destruction type coals under uniaxial compression are studied. The results show that electrical parameters change curves of the loaded raw coal samples and briquette have a very good consistency; the consistency of dielectric constant curve and coal stress-strain curve is better than the resistivity curve. The resistivity curve of loaded coal in general is concave shape with the stress-strain curves, and the dielectric constant curve is convex shape generally. Compared to the initial electrical parameter values of the coal samples, the electrical parameter change rate of raw coal samples and briquette are generally higher than 13％, up to 165％, the electrical parameter change rate of raw coal samples is generally higher than briquette. The electrical parameter change of loaded coal and its stress have significantly coherence, electrical parameters variation of loaded coal better reflects the formation, development and transfixion of micro-fractures, and the characteristics of changes in internal structure in the failure process of coal rock. In the case of uniaxial compression, coal is dominated by electronic conductivity in the Ⅰ, Ⅱ phases, and ionic conductivity in Ⅲ, Ⅳ phases, the dielectric constant changes of loaded coal have a close relation with its changes in the structure, cracks closure and cracked degree.
loaded coal electrical parameters variation coal and gas outburst
Wang Yungang Wei Jianping Yang song
Henan Polytechnic University, Gas Geology and Gas Control of Ministry State Key Laboratory Breeding Henan Polytechnic University, Gas Geology and Gas Control of Ministry State Key Laboratory Breeding
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
938-945
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）