砌体墙在大跨度巷道中的应用

摘要

土城煤矿15#煤层盘区轨道大巷在掘进过程中遇到小煤矿遗留下的平行巷道，使巷道宽度变大，提出使用砌体墙配合锚杆支护方式对大跨度巷道进行支护，通过数值分析砌体墙在巷道支护过程中稳定性及巷道围岩变形情况，确定了砌体墙的强度及尺寸。经工业性实践，砌体墙在使用过程中未发生破坏，大跨度巷道围岩变形较小，支护效果良好。%Aiming at the increased lane width due to the parallel roadway left by small coal mines in the track Lane tunneling at 15# coal seam panel of Tucheng Colliery,the author proposes the application of masonry wall with bolting support method for large span roadway support,in which the size and strength of masonry wall are determined according to the steady qualitative of masonry wall in tunnel support process and roadway surrounding rock deformation by the numerical analysis.