Simulation of the relationship between roadway dynamic destruction and hypocenter parameters

作     者：GAO Ming-shi DOU Lin-ming ZHANG Nong XIE Yao-she ZHENG Bai-sheng 

作者机构：State Key Laboratory of Coal Resources and Mine Safety Xuzhou Jiangsu 221008 China Shool of Mining and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Journal of China University of Mining and Technology》 (中国矿业大学学报（英文版）)

年 卷 期：2008年第18卷第1期

页      面：93-97页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Projects 50490270, 50474068, 50674085 supported by the National Natural Science Foundation of China 2005CB221504 by the National Key FoundationResearch Program of China 2006BAK04B02, 2006BAK03B06 by the National Science Program of China NCET-06-0478 by the Ministry of Education New Century Outstanding Person Programming of China 2006B002 by the Science Foundation of China University of Mining and Technology 

主　　题：rock burst roadway supporting destruction process shock energy shock distance double ear effect 

摘      要：Many factors can induce rock burst. Shock energy and shock distance are two key factors affecting rock burst. The 32101 roadway of the Xingcun coal mine, which has a tendency for rock burst, was used as an example. The dynamic module of Itasca’s FLAC (Fast Lagrangian Analysis of Continua) 2D explicit finite-difference software was used to simulate the roadway’s destruction. The vibration velocity and displacements of the rock surrounding the roadway were modeled for different shock energies and hypocenter distances. The simulation results indicate that the vibration velocity and displacement of rock surrounding the roadway have a quadratic relationship to the shock energy and a power law relationship to the distance of the hypocenter from the roadway. A dynamic view of the process was obtained from a series of snap-shots collected at 100 different time steps. This shows an isolating river is first formed at the hypocenter. The region above the river is a low stress zone while below the river a high stress zone exists. This high stress zone surrounds the ribs of the roadway in a double ear pattern. Continuous and repeated action of the high stress in the double ear shaped zone destroys the roadway.