文献类型：期刊文献

中文题名：Damage characteristics and catastrophic failure mechanism of coal rock induced by gas adsorption under compression

作者：Xiaochun Xiao[1];Lei Wang[1];Jun Xu[1];Xiangfeng Lv[2];Pengfei Guo[3];Yishan Pan[4]

机构：[1]School of Mechanics and Engineering,Liaoning Technical University,Fuxin,123000,China;[2]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing,100083,China;[3]School of Civil Engineering,Shaoxing University,Shaoxing,312000,China;[4]College of Physics,Liaoning University,Shenyang,110036,China

年份：2020

卷号：12

期号：3

起止页码：587

中文期刊名：岩石力学与岩土工程学报：英文版

收录：CSTPCD、、Scopus、CSCD2019_2020、CSCD

基金：financial support by the National Natural Science Foundation of China(Grant Nos.51974186,51774164 and 51774048)。

语种：英文

中文关键词：Damage characteristics;Catastrophic failure mechanism;Adsorption damage;Coal rock

中文摘要：To reveal the damage characteristics and catastrophic failure mechanism of coal rock caused by gas adsorption,physical tests and theoretical methods are employed.The results show that adsorption swelling can damage coal rock,which can be distinguished by fractal dimension.A fitting relationship between the adsorption damage and fractal dimension is proposed by experimental testing and theoretical analysis.High gas adsorption pressure proves to be the dominant factor that leads to coal failure softening and gas outburst disasters.Three main parameters concerning adsorption damage include the change rate of released energy density,the transition difference in the post-peak acoustic emission(AE)b value and the change rate of cumulative AE energy.Results show that all the three parameters present a step-type decreasing change with the increase in fractal dimension,and the fractal dimension shows a linear relationship within the same failure mode.Finally,a method is proposed to evaluate coal rock disaster transformation,based on the aforementioned three main parameters of adsorption damage.