文献类型：会议论文

英文题名：Compaction characteristics and permeability evolution characteristics of broken coal body under triaxial stress

作者：Wang, Fakai Sun, Zhongguang Peng, Mai Cui, Bo Zhang, Jianxin

第一作者：王法凯

机构：[1] Guizhou Institute of Technology, College of Mining Engineering, Guiyang, China; [2] Chongqing University, CCTEG Chongqing Research Institute, CCTEG Chongqing Smart City Technology Research Institute Co. Ltd., Chongqing, China

第一机构：贵州理工学院矿业工程学院

会议论文集：Proceedings - 2020 2nd International Conference on Artificial Intelligence and Advanced Manufacture, AIAM 2020

会议日期：December 26, 2020

会议地点：Shanghai, China

语种：英文

外文关键词：Artificial intelligence - Coal - Coal industry - Coal mines - Compaction - Flow of fluids - Particle size - Porosity - Seepage - Spontaneous combustion - Stress analysis - Subsidence

年份：2020

摘要：In the process of coal mining, the compaction characteristics of the goaf and its permeability evolution characteristics are critical to the safe and efficient mining of coal mines, which directly affect surface subsidence, air leakage in the goaf and spontaneous combustion of coal. Although the stress and permeability of the goaf are very important, it is difficult to directly measure the stress and permeability of the goaf. Therefore, this paper uses the damaged coal and rock mass seepage test system to carry out the compaction and seepage tests of the broken coal mass under triaxial loading. The experimental shows that: (1) under the same stress, the strain of a single-size coal sample is smaller than the mixed particle size, and the porosity is greater than the mixed particle size. The larger the particle size of a single-size coal sample, the smaller its strain. (2) There are two stages of rapid compaction and slow compaction under the condition of triaxial compression of broken coal samples. The strain and permeability stress sensitivity of the rapid compaction stage are strong, while the slow compaction stage is weak. (3) Under triaxial loading of broken coal, permeability has an exponential relationship with effective stress, and a power function relationship with porosity, which obeys Darcy's law. The research results are of great significance for guiding the goaf gas drainage and preventing surface subsidence and spontaneous combustion of the goaf coal. ? 2020 IEEE.