大采高工作面超前支承压力分布规律的数值模拟

摘要

Aimed at getting out the law of abutment pressure distribution in the large cutting height workface, the paper simulates stress field distribution in the coal and rock mass in the coal mined by FLAC3D, gets out that with the increase of the advancing distance in working face, the maximum value of abutment pressure shifts ahead, the concentration factor of pressure improves, the range of influence increases. The law of abutment pressure distribution could provide theoretical guidance for theory and controlling of coal wall caving and floor heave of roadway.%为了获得大采高工作面超前支承压力分布规律，采用FLAC3D数值仿真软件对工作面推进过程中煤岩体内支承压力分布进行了数值模拟，得出了随着工作面向前推进距离的增加，支承压力峰值前移、应力集中系数增大、影响范围扩大。支承压力分布规律能够为煤壁片帮、巷道底鼓的机理与防治提供理论指导。