Study on the relation between damage and permeability of sandstone at depth under cyclic loading

作     者：Yang Zhao Hongwei Zhou Jiangcheng Zhong Di Liu 

作者机构：School of Mechanics and Civil EngineeringChina University of Mining and TechnologyBeijing 100083People's Republic of China Mine Safety Technology Branch of China Coal Research InstituteBeijing 100013People's Republic of China School of Energy and Mining EngineeringChina University of Mining and TechnologyBeijing 100083People's Republic of China State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyBeijing 100083People's Republic of China School of Aerospace EngineeringTsinghua UniversityBeijing 100084People's Republic of China 

出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)

年 卷 期：2019年第6卷第4期

页      面：479-492页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：The present work is supported by the National Natural Science Foundation of China(51904309,51674266) the Yueqi Outstanding Scholar Program of CUMTB and the State Key Research Development Program of China(2016YFC0600704) 

主　　题：Deep roof sandstone Cyclic loading Acoustic emission Permeability 

摘      要：The damage and permeability evolution of rock under stress is of great significance to engineering *** this paper,the evolution law of rock damage and permeability is studied by means of acoustic emission (AE) seepage experiment on deep roof sandstone with cyclic *** of damage uses the changes in acoustic emission fractal characteristics and compression parameter which based on elastic *** experimental results show that the AE events has fractal characteristic,in which the AE b-value and correlation dimension can represent the damage of *** the fractal characteristic value of AE increases,it indicates that the rock is in the compaction stage and the damage is not *** the fractal characteristic value of AE drops,it indicates that the rock was damaged,and the *** the cyclic load increasing step by step,the elastic modulus first increases and then *** compression parameter C to characterize the state of compaction and damage,it is obtained that the rock damage state and hydrostatic permeability show a power law function relationship with porosity and have the same *** compression parameter is less than zero,the evolution law of permeability and damage can be described by functional relationship between hydrostatic permeability K and compression parameter C.