Simulation experiment of AE-based localization damage and deformation characteristic on covering rock in mined-out area  

作　　者：Sheng-jun Miao Xing-ping Lai Xing-guang Zhao Fen-hua Ren 

机构地区：[1]School of Civil ＆ Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China [2]School of Energy Engineering, Xi＇an University of Science and Technology, Xi＇an 710054, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2009年第3期255-260,共6页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.10402033)

摘　　要：The localization damage and deformation characteristics of multiple rock in mined-out area under thick soil layer were investigated by acoustic emission （AE）-based physical similar simulation experiment and damage test combined with the AE theory on rock damage. During different mining courses, the degree of wall rock suffered from mining disturbed process in mined-out area was different, so did the AE density of initial damage and fracture. Some characteristic parameters, including large events, total events, and energy rate, presented fluctuations with temporal and spatial change and take on a certain extent statistic relation. Subsequently, the percent of damage degree was defined and divided into 4 stages, and the localization damage and deformation characteristics of surrounding rock in mined-out area and coal pillars were analyzed quantitatively.The localization damage and deformation characteristics of multiple rock in mined-out area under thick soil layer were investigated by acoustic emission （AE）-based physical similar simulation experiment and damage test combined with the AE theory on rock damage. During different mining courses, the degree of wall rock suffered from mining disturbed process in mined-out area was different, so did the AE density of initial damage and fracture. Some characteristic parameters, including large events, total events, and energy rate, presented fluctuations with temporal and spatial change and take on a certain extent statistic relation. Subsequently, the percent of damage degree was defined and divided into 4 stages, and the localization damage and deformation characteristics of surrounding rock in mined-out area and coal pillars were analyzed quantitatively.

关 键 词：acoustic emission soil layer underground mine rock damage in-site monitoring 

分 类 号：TU452[建筑科学—岩土工程] P542.2[建筑科学—土工工程]