深部破碎矿柱锚固注浆加固效果的模拟分析

Simulation Research of Anchoring and Grouting Reinforcement Effect on Broken Pillar in Deep Area

为了验证某矿破碎矿柱中垮塌巷道锚固注浆再造的效果,以203^#破碎矿柱为实例,运用FLAC有限元分析软件,建立几何模型,构造初始应力场,进行开挖巷道加固与非加固方案对比,分析了破碎矿柱经锚固注浆加固后的开采安全性。模拟计算结果表明,开挖的巷道经加固后其四周岩体的塑性区域明显减小,且顶板位移图形向下呈弧型,顶板最大位移量1.294cm,而非加固巷道的最大位移量为31.07cm,锚注加固后巷道的竖向位移明显减小,变形得到了有效控制,加固效果显著。

In order to verify the effect of anchoring and grouting reinforcement effect on broken pillar in a mine,taking 203#broken pillar as an example,ageometric model was established and the initial stress field was constructed by using FLAC finite element analysis software.The comparison between reinforcement and non-reinforcement scheme of excavation roadway was carried out,and the mining safety of broken pillar reinforced by anchoring and grouting was analyzed.The simulation results showed that the plastic zone of rock mass around the excavation roadway was obviously decreased after reinforcement,and the displacement figure of the roof showed a downward arc shape,with the maximum displacement of the roof of 1.294 cm.While for the non-reinforcement scheme,the maximum displacement was 31.07 cm.After reinforcement,the vertical displacement was obviously reduced,the deformation of roadway was effectively controlled,and the reinforcement effect was obvious.