摘要
为掌握常村煤矿冲击地压的发生机理及主要影响因素,采用理论分析和数值模拟的方法对冲击地压机理及影响因素进行研究,采用突变理论学等理论对煤柱承受载荷进行分析,得出Z形煤柱冲击地压的主要影响因素为顶板岩层刚度、采空区顶板悬吊长度、煤柱宽度、岩体的黏聚力和内摩擦角等,并利用尖点突变模型对煤柱冲击地压失稳条件进行理论推导,得到了Z形煤柱冲击地压与影响因素的关系式;通过对Z形煤柱区域进行数值模拟,得出了Z形煤柱周边区域应力分布规律。
In order to obtain rock burst mechanism and major influencing factors of deep coal face in Changcun Mine, this paper research rock burst mechanism and major influeucing factors based on the basic theory and numerical simulation. This paper analyzed the load beared by coal pillar based on catastrophic theory, and obtained the major influencing factors of Z shaped-coal pillar rock burst were the roof rock rigidity, the suspended length of goaf roof, the width of coal pillar, the rock cohesion and angle of internal frietion.Throtlgh theoretical derivation on the destabilization conditions of rock burst induced by coal pillar based on the cusp catastrophe model, the paper obtained the mathematical relationship between Z shaped-coal pillar rock burst and the influencing factor.Through the numerical simulation, the law of stress distribution in Z shaped-coal pillar area was achieved.
出处
《煤炭科学技术》
CAS
北大核心
2013年第11期50-52,共3页
Coal Science and Technology
关键词
冲击倾向性煤层
Z形煤柱
突变理论
应力分布规律
冲击地压机理
bump-prone seam
Z shaped-coal pillar
catastrophic theory
stress distribution law
rock burst mechanism
