A novel binary effective medium model to describe the prepeak stressstrain relationship of combined bodies of rock-like material and rock

作     者：Tienan Wang Yue Zhai Huan Gao Yubai Li Ruifeng Zhao Tienan Wang;Yue Zhai;Huan Gao;Yubai Li;Ruifeng Zhao

作者机构：School of Geological Engineering and GeomaticsChang’an UniversityXi’an 710064China Key Laboratory of Mine Geological Disaster Hazard Mechanism and ControlMinistry of Natural ResourcesXi’an 710064China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2023年第33卷第5期

页      面：601-616页

核心收录：

学科分类：081901[工学-采矿工程] 0808[工学-电气工程] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0807[工学-动力工程及工程热物理] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：the Major Program of National Natural Science Foundation of China(No.41941019) Shaanxi Province Innovative Talent Promotion Plan-Science and Technology Innovation Team(No.2021TD-55) Central University Natural Science Innovation Team(No.300102262402) 

主　　题：Combined body stress-strain relationship Hooke’s law Effective medium theory Stress threshold determination 

摘      要：Combined bodies of rock-like material and rock are widely encountered in geotechnical engineering,such as tunnels and *** existing theoretical models describing the stress-strain relationship of a combined body lack a binary *** on effective medium theory,this paper presents the governing equation of the“elastic modulusfor combined and single bodies under triaxial compressive tests.A binary effective medium model is then *** on the compressive experiment of concretegranite combined bodies,the feasibility of determining the stress threshold based on crack axial strain is discussed,and the model is *** model is further extended to coal-rock combined bodies of more diverse types,and the variation laws of the compressive mechanical parameters are then *** results show that the fitting accuracy of the model with the experimental curves of the concretegranite combined bodies and various types of coal-rock combined bodies are over 95%.The crack axial strain method can replace the crack volumetric strain method,which clarifies the physical meanings of the model *** variation laws of matrix parameters and crack parameters are discussed in depth and are expected to be more widely used in geotechnical engineering.