Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

作     者：Dong ZHOU Yicheng YE Nanyan HU Weiqi WANG Xianhua WANG Dong ZHOU;Yicheng YE;Nanyan HU;Weiqi WANG;Xianhua WANG

作者机构：School of Resources and Environmental EngineeringWuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral ResourcesWuhan 430081China Sinosteel Wuhan Safety and Environmental Protection Research Institute Co.Ltd.Wuhan 430081China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2021年第15卷第6期

页      面：1372-1389页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This study was supported by the Natural Science Foundation of Hubei Province(No.2020CFB123) the Scientific Research Program of Hubei Education Department(No.Q20201109) 

主　　题：soft−hard composite layered rock mass double cracks crack evolution acoustic emission digital image correlation 

摘      要：Acoustic emission and digital image correlation were used to study the spatiotemporal evolution characteristics of crack extension of soft and hard composite laminated rock masses(SHCLRM)containing double fissures under uniaxial *** effects of different rock combination methods and prefabricated fissures with different orientations on mechanical properties and crack coalescence patterns were *** characteristics of the acoustic emission source location distribution,and frequency changes of the crack evolution process were also *** test results show that the damage mode of SHCLRM is related to the combination mode of rock layers and the orientation of *** layers predominantly produce tensile cracks;soft layers produce shear *** first crack always sprouts at the tip or middle of prefabricated fractures in hard *** acoustic emission signal of SHCLRM with double fractures has clear stage characteristics,and the state of crack development can be inferred from this signal to provide early warning for rock fracture *** study can provide a reference for the assessment of the fracture development status between adjacent roadways in SHCLRM in underground mines,as well as in roadway layout and support.