沿空留巷巷旁软介质接顶作用机制及工程应用

摘要

For using gob-side entry retaining under the condition of hard limestone roof in thin coal seam of a mine,the mechanical model of roadside soft medium connecting roof is established,theoretical calculation is used to obtain the height range of soft medium,numerical simulation is used to analyze the relationship among the characteristics of roadside support,plastic zone of roadway surrounding rock,deformation of surrounding rock and the height of soft medium,which determines that the height of soft medium is 0.2 m.%针对某矿坚硬灰岩顶板条件下薄煤层沿空留巷问题,建立了巷旁软介质接顶力学结构模型,理论计算得出了软介质的高度范围,利用数值模拟对巷道围岩塑性区、巷旁支护体整体特性、巷道围岩变形与软介质高度关系进行了详细分析,确定了接顶软介质高度为0.2 m.