综放工作面两端向中间放煤采动力学分析

Analysis of Coal Mining Kinetics at the Two Ends of Fully Mechanized Caving Face

为研究综放工作面两端向中间放煤的采动力学,以长治经坊煤业3-802工作面为工程背景,提出了综放工作面两端向中间放煤的基本力学模型,并在有限元软件ANSYS中分析了6m煤厚不同放煤次数下的顶煤受力特征。结果表明,在两端向中间放煤过程中,顶煤两侧煤块中部的应力为最大应力处,因此应特别加强对中部顶煤的支护。

In order to study the mining kinetics of coal caving at the two ends of fully mechanized caving face,the basic mechanical model of coal caving at the two ends of fully mechanized caving face is put forward based on the engineering background of Changzhi Jingfang coal 3-802 working face,and the stress characteristics of top coal under different coal discharge times of 6m coal thickness are analyzed in ANSYS.The results show that the stress in the middle of the coal block on both sides of the top coal is the maximum stress,so the support for the middle top coal should be strengthened.