基于松软破碎围岩巷道的支护优化设计

Support optimization based on soft and fractured surrounding rock roadway

中林煤矿南翼下山围岩松软破碎,受断层影响,巷道变形量大,底鼓严重,返修率高,为了降低巷道维修的费用和减少维修的次数,在原有支护方式的基础上,通过巷道围岩表面位移和围岩松动圈范围的观测以及COMSOL软件数值模拟,分析了巷道围岩变形的原因,优化了巷道的支护材料和巷道断面形状,最终提出了U型钢弧形断面的支护方式.采用优化后的支护设计在现场取得了良好的支护效果,可为同类矿井提供借鉴.

The surrounding rock roadway of Zhonglin Coal Mine against south wing downward is soft and fractured. Affected by faults, the roadway deformation capacity is big, the kick drum is serious, and repair rate is high. In order to reduce the maintenance costs and the frequency of maintenance, this paper, by using the roadway surface displacement, the rock loose circle range of observations, and by using the numerical simulation software COMSOL, analyzes the surrounding rock deformation reasons, optimizes roadway materials and shapes, and makes the U - shaped curved section of the support method. Using optimized support design in the field can make a good supporting effect, which provides references for similar mines.