孤岛工作面覆岩结构及煤柱宽度研究

Study on Overlying Rock Structure and Coal Pillar Width in Isolated Working Face

为了解决小煤柱沿空掘巷围岩变形控制难的问题,以山西方山金晖凯川煤业有限公司5110工作面为研究背景,通过理论分析结合数值模拟的方法对煤柱宽度对围岩稳定性的影响进行了一定的研究,发现随着煤柱宽度的增加,煤柱受到的垂直应力及水平应力均逐步增大,随距煤帮距离的增加呈现先增大后减小的趋势。

In order to solve the difficult problem of surrounding rock deformation control of gob side entry driving with small coal pillar,based on the research background of 5110 working face of Fangshan Jinhui Kaichuan Coal Industry Co.,Ltd.of Shanxi,this paper studied the influence of coal pillar width on surrounding rock stability through the method of theoretical analysis combined with numerical simulation.It is found that with the increase of coal pillar width,the vertical stress and horizontal stress of coal pillars increase gradually,and with the increase of the distance from the coal wall,it first increases and then decreases.