采矿与安全工程学报2017，Vol.34Issue(4)：707-714,8.DOI:10.13545/j.cnki.jmse.2017.04.015
采动巷道应力场环境特征与冒顶机理研究
Characteristics of stress-field environment and roof falling mechanism of mining influenced roadway
摘要
Abstract
To solve the problems of acute deformation and frequent roof caving in the surrounding rock of mining influenced roadway, with the mining roadway of Baode Coal Mine as research background; through the integrated use of field research, numerical simulation, theoretical analysis, and detection methods, the stress-field environment of mining influenced roadway was analyzed in terms of different sizes, ratio, direction of principal stress. Based on the theory of butterfly plastic zone, the internal rela-tion between the characteristics of stress-field environment and roof caving was analyzed. The results have indicated that: there exists obvious difference in the size, ratio, direction of principal stress be-tween sites of mining influenced space; within 10 meters to 50 meters of lateral working face, the prin-cipal stress ratio can reach 2 to 5 and the deflection angle of principal stress can reach 26° to 54°. The increase in the ratio and substantial rotation in the direction of principal stress leads to butterfly leaf's deviation to roof in this roadway surrounding rock area and larger plastic roof damage depth, and but-terfly leaf type roof caving occurs when the support cannot bear the huge expansion stress and acute deformation of the surrounding rock within the butterfly leaf.关键词
采动巷道/采动应力/塑性区/巷道冒顶Key words
mining influenced roadway/mining induced stress/plastic zone/roof caving分类
矿业与冶金引用本文复制引用
贾后省,李国盛,王路瑶,乔安震..采动巷道应力场环境特征与冒顶机理研究[J].采矿与安全工程学报,2017,34(4):707-714,8.基金项目
国家自然科学基金项目(51604094,51434006) （51604094,51434006）
深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金项目(G201612) （G201612）
