采矿与安全工程学报2018，Vol.35Issue(1)：155-162,8.DOI:10.13545/j.cnki.jmse.2018.01.022
采动应力集中壳和卸压体空间形态演化 及瓦斯运移规律研究
Evolution of mine-induced stress concentration shell and stress relief body and its gas migration
摘要
Abstract
In order to study the gas migration in the mine stope, considering the recovering compaction stress of overlaying strata, the distribution of vertical stress in overlying strata over mine goaf was ana-lyzed by using numerical simulations. The concept of mine-induced stress concentration shell and the pressure relief body is presented. By using FISH, the three-dimensional shape characteristics of stress concentration shell in surrounding rock over the goaf and the shape and evolutionary characteristics of stress relief body and compacted zone are obtained. According to different mining conditions in working face, the deformation process and interaction mechanism of the stress relief body in mine goaf are also gained. Through the three-dimensional model reconstruction, the shape of stress relief body was im ported to COMSOL Multiphysics numerical simulation software. Rules of gas migration and accumula-tion in coal and rock strata are obtained for three different ventilation pattern. The results show that: the gas concentration in air intake entry of mine goaf dilutes fastest. There is a "fan-shaped" diluting area in goaf and the gas apparently gathers in the upper corner of working face when using U-type ventilation pattern. The Y-type or U-type + high level gas drainage roadway could effectively solve the gas problem in mine working faces.关键词
应力集中壳/应力卸压体/三维围岩形态/瓦斯运移Key words
stress concentration shell/stress relief body/three dimensional surrounding rock/gas migration分类
矿业与冶金引用本文复制引用
洛锋,曹树刚,李国栋,李勇..采动应力集中壳和卸压体空间形态演化 及瓦斯运移规律研究[J].采矿与安全工程学报,2018,35(1):155-162,8.基金项目
国家自然科学基金项目(51474039,51404046) （51474039,51404046）
河北省教育厅科学研究计划项目(QN2015069) （QN2015069）
邯郸市科技局计划项目(1521109072-7) （1521109072-7）
