区段煤柱对相邻工作面采空区覆岩下沉规律的影响研究

Research on the influence of stage coal pillars on the subsidence law of overlying strata in goaf of adjacent working face

为了研究不同区段煤柱宽度对相邻工作面采空区上覆岩层下沉量影响,以安阳龙山煤矿11061、11081相邻工作面为工程背景,采用3DEC软件计算得出各区段煤柱宽度下相邻工作面采空区上覆岩层下沉情况。结果表明:相邻工作面采空区上覆各岩层下沉量自采空区底板至上覆各岩层不断减小,区段煤柱区域内上覆各岩层交界面处下沉量自煤柱底部至上覆各岩层交界面不断增加;随着区段煤柱宽度的增加,其对先开采工作面一侧的支撑作用不断增强,对后开采工作面一侧边界煤柱的支撑作用无影响。

In order to study the influence of coal pillar widths in different stages on the subsidence of the overlying strata in the goaf of adjacent working faces,the 3DEC software is used to calculate the adjacent working faces of Anyang Longshan Coal Mine 11061 and 11081 to obtain the subsidence of the overlying strata in the goaf of the adjacent working faces under the coal pillar widths of each stage.The results showed that the subsidence of the overlying strata in the goaf area of adjacent working faces decreases continuously from the goaf floor to the overlying strata,and the subsidence at the interface of the overlying strata in the stage coal pillar area increases from the bottom of the coal pillar to the interface of the overlying strata;as the width of the stage section coal pillar increases,its supporting effect on the side of the former mining face continues to increase,and it has no effect on the support of the boundary coal pillar on the side of the later mining face.