长沟峪煤矿大倾角煤层开采煤体应力数值模拟

Numerical simulation of coal body stress at coal seam with large inclined angle in Changgouyu

研究大倾角煤层开采煤体应力分布规律,应用ANSYS有限元软件对长沟峪煤矿-140 m水平北—北4槽壁式工作面开采煤体应力进行数值模拟。结果表明,工作面前方煤体最大应力集中系数为1.92;工作面下部煤体的应力集中系数高于上部;煤体最大应力值介于4.71～5.12 MPa之间,发生在工作面下部20～24 m范围内。该研究为工作面安全生产与支护设计提供了依据。

This paper is an attempt to investigate the regularity of stress distribution of the coal body at steeply dipping coal seam,by using ANSYS FEM software to simulate the stress characteristics of the coal body at-140 m level wall type working face in north fourth slot of Changgouyu mine.The results show that coal body in front of the working face has the maximum stress concentration factor of 1.92,the working face of lower part is exposed to a higher stress concentration factor,and the maximum stress varying from 4.71 MPa to 5.12 MPa occurs between 20 m and 24 m in the lower part of the working face.The study provides theoretical supports for safety production and support design of working face.