文献类型：期刊文献

英文题名：Microscopic acoustic emission simulation and fracture mechanism of cemented tailings backfill based on moment tensor theory

作者：Cheng, Aiping Shu, Pengfei Deng, Daiqiang Zhou, Chengsong Huang, Shibing Ye, Zuyang

第一作者：Cheng, Aiping

通信作者：Cheng, AP[1]

机构：[1]Wuhan Univ Sci & Technol, Sch Resource & Environm Engn, Wuhan 430081, Peoples R China;[2]Xiangtan Univ, Sch Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China;[3]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Wuhan Univ Sci & Technol, Sch Resource & Environm Engn, Wuhan 430081, Peoples R China

通信机构：corresponding author), Wuhan Univ Sci & Technol, Sch Resource & Environm Engn, Wuhan 430081, Peoples R China.

年份：2021

卷号：308

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20214110992206);Scopus(收录号：2-s2.0-85116473541);WOS:【SCI-EXPANDED(收录号:WOS:000709775400001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 51604195 ; 51764009 ), and the Guizhou Province Science and Technology Support Plan Project (Grant No. [2018]2836), and the National Natural Science Foundation of Hubei Province (Grant No. 2018CFC818 ).

语种：英文

外文关键词：CTB; AE; Particle flow code; Moment tensor; Fracture mechanism

摘要：As an artificial pillar, the cemented tailings backfill (CTB) is not destroyed in a short time. It is of great significance to understand the fracture mechanism of CTB for mine backfilling design. Based on laboratory tests and moment tensor theory, the micro-structure parameters of CTB are calibrated, the acoustic emission (AE) simulation method of CTB on micro-scale is established, and the temporal and spatial evolution process and mechanism of CTB fracture under uniaxial compression are studied. The results show that: 1) The fracture of CTB is mainly caused by sliding friction between particles based on the analysis of the relationship between the parameters of AE events. 2) In the process of CTB uniaxial compression simulation, the fracture types of AE sources can be divided into three types: explosion, shear and implosion. Explosion events are dominant in quantity and energy release, followed by shear events and implosion events. 3) The fracture type of AE sources is determined by the force acting on the particles determines the fracture mechanism instead of the ratio between the number of micro-tensile and micro-shear cracks. The research results can provide theoretical guidance for the stability control of CTB.