针对老石旦煤矿煤层厚度及埋深较大，煤层顶板互层为复合顶板，且层间岩体性质差距较大等特点，采用数值模拟方法对其煤巷顶板支护锚杆间排距进行优化。结果表明：锚杆间排距由0．7 m 扩大到0．8 m 时，巷道围岩塑性区及表面位移变化不明显，继续扩大到0．9 m 时二者变化量增大。结合支护经验，确定锚杆间排距为0．8 m，可获得良好的支护效果。%The coal seam thickness and buried depth is larger than others in Laoshidan coal mine, the alternating layers of roof is composite and the rock mass properties is different greatly between the lay-ers,according to this characteristics,the row spacing between coal roadway roof bolt is optimized based on numerical simulation method.The results show that,the distance between the anchor rods expand from 0.7 m to 0.8 m,the plastic zone and the roadway surface displacement are not obvious,when the distance between the anchor rods expand to 0.9 m,the plastic zone and the roadway surface displacement are increased.Combined with the supporting experience,the reliable distance value between the anchor rods is 0.8 m,based on this parameters,good supporting effects can be obtained.
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