特厚煤层沿空掘巷合理煤柱尺寸研究

Study on Reasonable Pillar Size of Roadway Driving along Goaf in Extra Thick Coal Seam

在分析龙王沟煤矿特厚煤层地质条件的基础上,分别采用理论计算和数值模拟的方法,对龙王沟煤矿61612工作面主运顺槽与61610工作面辅运顺槽间合理煤柱宽度的选取进行了研究。具体分别在不同区段煤柱宽度的条件下,从工作面侧向支承压力分布规律、61612工作面主运顺槽的围岩变形情况等方面进行了对比分析,最终结合计算结果与实际生产地质条件,确定区段煤柱的合理宽度10 m。

Based on the analysis of the geological conditions of extra thick coal seam in Longwanggou coal mine,the selection of reasonable coal pillar width between the main transportation channel of61612 working face and the auxiliary transportation channel of 61610 working face in Longwanggou coal mine is studied by using the methods of theoretical calculation and numerical simulation.Specifically,under the conditions of coal pillar width in different sections,the comparative analysis is carried out from the aspects of lateral bearing pressure distribution law of working face and surrounding rock deformation of main transportation channel of 61612 working face.Finally,combined with the calculation results and actual production geological conditions,the reasonable width of coal pillar in the section is determined to be 10 m.