Geophysical characteristics of anthracites with various structures: a case study on the southern Qinshui Basin, north China

作     者：Juan TENG Zhigang WEN Chen LI Lingye MENG Juan TENG;Zhigang WEN;Chen LI;Lingye MENG

作者机构：Hubei Key Laboratory of Petroleum Geochemistry and EnvironmentYangtze UniversityWuhan 430100China College of Resources and EnvironmentYangtze UniversityWuhan 430100China Research Institute Company LimitedCNOOCBeijing 100028China Institute of Petroleum Exploration and Development of PetroChina Tarim OilfieldKorla 841000China 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2022年第16卷第3期

页      面：696-710页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.42102194) 

主　　题：geophysical characteristics coal structures pore size distribution acoustic emission electrical resistivity acoustic velocity 

摘      要：Deformation of coals under tectonic movements could cause reduction of mechanical strength and enhancement of gas adsorption,which might result in coal and gas outburst,and cause safety and environmental *** this study,geophysical characteristics of coals with various structures were investigated with a special emphasis on characterization of pore size distribution,rock mechanical strength,acoustic emission,resistivity and acoustic velocity of anthracites with three types of structures in the Qinshui Basin,north *** studied No.3 coal seam developed three types of structures,namely undeformed coal,cataclastic coal,and granular *** observations under scanning electron microscope and pore size distribution using N2 and CO_(2) adsorption of anthracites of three types show that the undeformed coal consists of primary micropores,and cataclastic coal is mainly composed of mesopores and well-connected *** comparison,granular coal has the least *** mechanical strength,acoustic emission,resistivity and acoustic velocity of coals with three structure types were investigated under uniaxial and triaxial *** increasing degree of deformation of anthracites,compression strength,Young’s modulus,density,acoustic emission counting and acoustic velocity decreases,while resistivity *** suggest that the evolution of pore size distribution of anthracites with increasing degree of deformation contributed to variations of geophysical characteristics of coals with different structures to some extent.