文献类型：期刊文献

英文题名：Study on the Permeability Change Characteristic of Gas-Bearing Coal under Cyclic Loading and Unloading Path

作者：Wang, Fakai Li, Xuelong Cui, Bo Hao, Jian Chen, Peng

第一作者：王法凯

通信作者：Li, XL[1];Li, XL[2];Li, XL[3]

机构：[1]Guizhou Inst Technol, Coll Min Engn, Guiyang 550000, Guizhou, Peoples R China;[2]Shandong Univ Sci & Technol, Mine Disaster Prevent & Control Minist, State Key Lab Breeding Base, Qingdao 266590, Peoples R China;[3]Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China;[4]Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China;[5]North China Inst Sci & Technol, Sch Safety Engn, Langfang 101601, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Shandong Univ Sci & Technol, Mine Disaster Prevent & Control Minist, State Key Lab Breeding Base, Qingdao 266590, Peoples R China;corresponding author), Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China;corresponding author), Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China.

年份：2021

卷号：2021

外文期刊名：GEOFLUIDS

收录：;Scopus(收录号：2-s2.0-85105836643);WOS:【SCI-EXPANDED(收录号:WOS:000675753200006)】；

基金：This work is supported by the National Natural Science Foundation of China (51904167, 51474134, and 51774194), Taishan Scholars Project, Taishan Scholar Talent Team Support Plan for Advantaged & Unique Discipline Areas, State Key Laboratory of Coal Resources and Mine Safety of China (SKLCRSM19KF008), Natural Science Foundation of Chongqing, China (cstc2019jcyj-bsh0041), Postdoctoral Science Foundation Project funded by State Key Laboratory of Coal Mine Disaster Dynamics and Control (2011DA105287-BH201903), Key R&D plan of Shandong Province (2019SDZY034-2), Cultivation and Exploration and Innovation Project of New Academic Seedlings of Guizhou Institute of Technology (GZLGXM-04), and Natural Science Foundation of Hebei Province (E2019508100). We thank the anonymous reviewers for their comments and suggestions to improve the manuscripts.

语种：英文

摘要：Using the self-developed three-axis servo fluid-solid coupling system with gas-solid coupling of gas-bearing coal, the variation law of the permeability of gas coal under the stress cycle loading and unloading path was studied. The qualitative and quantitative relationships between permeability, axial force, and radial stress of gas-bearing coals were established, and the variation law of permeability of gas-bearing coals was discussed. The results show that (1) different cyclic loading and unloading stress paths correspond to the permeability characteristics of different gas-bearing coals. (2) Permeability of gas-bearing coal decreases with the increase of axial stress and radial stress, and it has a logarithmic function with axial stress and radial stress. This shows that axial stress and radial stress are important factors affecting the permeability characteristics of gas-bearing coal. (3) Under the same stress loading and unloading conditions, the axial stress is less than radial stress on the permeability of gas-bearing coal. In the cyclic loading and unloading axial stress process, the permeability of the gas-bearing coal varies by a smaller extent than the cyclically unloaded confining force. (4) The cumulative damage rate of gas-bearing coal under axial stress gradually increases with the increase of the number of cycles of loading and unloading, and the rate of the cumulative damage rate of permeability is less than the corresponding rate of radial stress.