孤岛工作面矿压显现规律数值模拟研究

Numerical simulation study on isolated island working face mining pressure of Changcun Mine

以常村煤矿s6-5孤岛工作面为工程背景,采用Flac^(3D)数值模拟软件研究了常村矿s6-5孤岛工作面采场的应力分布特征。研究表明:s6-5工作面采空区内顶板经过垮落压实后应力由卸压状态逐渐回升,工作面前方煤体上下端头处应力集中明显,三角煤体破碎严重,中部煤体破碎程度相对较低。采空区顶板及上覆岩层出现明显卸压,工作面上下区段护巷煤柱上出现明显应力叠加集中,在开切眼至工作面推进煤壁的范围内护巷煤柱应力峰值较大且载荷集中。

Based on the engineering background of the s6-5 isolated island working face in Changcun Mine,the stress distribution characteristics of the s6-5 island face in Changcun Mine were studied by Flac3D numerical simulation software.The results show that the stress of the slab in the goaf area of the s6-5 face is gradually increased after the crust compaction,and the stress concentration in the upper and lower ends of the coal face in the working face is obvious,and the crust is serious.Brokenness is low.The surface of the roof and the overburden layer of the pressure is apparently relieved.In the upper and lower sections of the protection of the coal pillar,the stress peak on the stack is concentrated obviously.The scope of the roadway pillar stress in the open cut to the face of the coal wall is larger and concentrated.