煤矿安全2017，Vol.48Issue(12)：187-190,194,5.DOI:10.13347/j.cnki.mkaq.2017.12.050
基于3DEC的多节理顶底板失稳过程分析及应力重新分布研究
Instability Analysis and Stress Redistribution of Multi-joint Roof and Floor Based on 3DEC
摘要
Abstract
In order to analyze the process of multi-joint roof failure and stress redistribution,the mining face model is established by 3DEC,the instability mechanism and the distribution law of the bearing pressure and the joint normal stress are analyzed and simulated in the mining process.The simulation results show that:the failure of the multi-joint roof is caused by the failure of the block three-hinged arch structure along the joint surface;due to the presence of lateral squeezing force,only the hinge at the joints will be cracking;comparing with the more conplete rock,the heaving phenomenon of multi-joint floor is more obvious;before the first occurrence of the roof,the appearance of the maximum bearing pressure is farther and farther from the working face with the advancing of the working face,the maximum and minimum joint normal stress is basically the same relative to the distance of working face;the normal stress of the joint surface reflects the degree of mutual squeezing between the blocks,which is greater than the bearing pressure.关键词
多节理/失稳过程/节理法向应力/应力重新分布/3DEC数值模拟Key words
Multi-joint/instability process/joint normal stress/stress redistribution/3DEC numerical simulation分类
矿业与冶金引用本文复制引用
董鹂宁..基于3DEC的多节理顶底板失稳过程分析及应力重新分布研究[J].煤矿安全,2017,48(12):187-190,194,5.基金项目
西安科技大学培育基金资助项目(2009005) （2009005）
