论文部分内容阅读
以吴四圪堵煤矿首采的6101综放工作面为工程背景,采用理论分析、数值模拟和现场实测等手段,运用煤柱屈服区宽度理论分析了煤柱弹塑性区域范围与煤柱宽度的关系,并运用数值模拟对不同宽度条件下的煤体应力分布、巷道围岩变形量和煤柱破坏场等参数进行研究。研究结果表明,随着煤柱宽度的增加,煤柱内煤体的垂直应力、剪切应力逐步减小,巷道围岩变形量逐渐减小,当煤柱宽度增大到一定值,巷道围岩变形量趋于稳定。
Based on the engineering background of 6101 fully mechanized caving mining face, which is the first coal mining in Wusihuan Coal Mine, the range of pillars’ elastic-plastic zone and the width of pillars are analyzed by theoretical analysis, numerical simulation and field measurement. The numerical simulation is used to study the stress distribution of coal body under different width conditions, the deformation of surrounding rock and the failure of coal pillar. The results show that with the increase of coal pillar width, the vertical stress and shear stress of coal in coal pillar gradually decrease and the deformation of surrounding rock of tunnel gradually decreases. When the coal pillar width increases to a certain value, the surrounding rock Deformation tends to be stable.