采矿与安全工程学报Issue(1)：109-115,7.DOI:10.13545/j.cnki.jmse.2016.01.017
基于实测地应力的综放工作面采动应力分布及演化特征研究
Mining-induced stress distribution and its evolution in fully mechanized top-coal caving face based on in-situ stress
摘要
Abstract
Value and orientation of in-situ stress play an important role in surrounding rock defor-mation, dynamic disaster and mining-induced stress field around the fully mechanized top-coal caving (FMTC) face, which was always little considered in the past related research work. The hollow inclu-sion strain gauge method was used to measure the in-situ stress in the south limb of Zhu-xianzhuang(ZXZ) coal mine, and the original ground stress field has been feedback analyzed based on multi-objective constraints optimization method, while the results illustrate the optimum boundary loads and in-situ stress distribution. In addition, numerical models with FLAC3D have been established to in-vestigate the influence law of mining-induced stress redistribution characteristics in FMTC mining face by the factors of the intersection angle between the longwall panel advancing direction and the maxi-mum stress direction, the non-uniform coefficients of horizontal stress, and the lateral pressure coeffi-cients, and so on. The results indicate that in-situ stress states has remarkable effect on mining-induced stress distribution and evolution characteristics of FMTC mining face. Finally, based on the real in-situ stress state, physical and mechanical parameters of coal-rock mass, and mining conditions of a coal face in ZXZ coal mine, the mine-induced stress distribution rules and its evolution process were further ana-lyzed. Research results show that superposition and interaction of mining-induced stress and in-situ stress are important for strata management and roadway support in similar FMTC mining face.关键词
地应力/优化反分析/采动应力场/综放工作面Key words
in-situ stress/optimum back analysis/mining-induced stress/fully mechanized top-coal caving mining face分类
矿业与冶金引用本文复制引用
刘钦节,杨科,陈贵,成荣发,史厚桃..基于实测地应力的综放工作面采动应力分布及演化特征研究[J].采矿与安全工程学报,2016,(1):109-115,7.基金项目
国家自然科学基金项目(51374011)；中国博士后基金项目(2013M531494)；安徽理工大学博士、硕士基金项目(11176) （51374011）
