沿空掘巷煤柱留设尺寸参数优化

Parameter Optimization for Remained Coal Pillar Size of Gob-side Entry Driving

针对某矿15#煤层地质条件,提出了采用沿空掘巷留小煤柱的技术进行采掘,通过理论分析确定了煤柱的留设宽度,并采用FLAC3D数值模拟研究了沿空掘巷在不同的煤柱宽度条件下巷道围岩的位移场和应力场,通过对煤柱及巷道围岩的应力、应变和位移进行对比分析,再次验证了15#煤层相邻工作面区段沿空掘巷的煤柱宽度为4 m。并将研究结果运用于具体工程实践,取得了较为良好的技术经济效果。

In view of the geological conditions of 15#coal seam of a mine,we propose the mining technology of gob-side entry driving to remain small coal pillar. We use theoretical analysis to determine the width of coal pillar,and use FLAC3 Dsoftware to stimulate the stress and displacement field of coal pillar under different conditions of coal pillar width. By the contrastive analysis of the stress,strain and displacement of the coal pillar and roadway surrounding rock,we identify a reasonable width of the coal seam,and obtain a more favorable technical and economic result.