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针对倾斜软弱破碎围岩矿体,在采用下向进路分层充填采矿法的基础上,提出\\\"自测预应力让压锚杆+金属网+让压免张拉预应力锚索\\\"联合支护方案对非对称进路巷道两帮围岩进行支护.结合工程实际,应用此联合支护方案于蚕庄金矿,确定出锚杆与锚索各相关参数,并得出采场围岩破坏范围与加固原理图,最后采用UDEC数值模拟软件对两帮围岩移近量及塑性区分布情况进行分析.研究结果表明:进路巷道两帮围岩稳定性良好.该支护方案极大地降低了矿石贫化率、损失率,并为回采作业提供了安全保障,具有一定的推广意义与使用价值.
Based on the stratified filling mining method with downward directed approach, aiming at the ore body with tilting weak crushing surrounding rock, it is proposed that the self-test prestress should allow the bolt + metal net + let the tension-free prestressed anchor cable \\ Combined support scheme is used to support two surrounding rocks of asymmetric roadway.According to the engineering practice, this joint support scheme is applied to the silkworm at Zhuangzhuang Mine to determine the relevant parameters of anchor rod and anchor cable, and the stope Finally, UDEC numerical simulation software is used to analyze the near quantity and the distribution of plastic zone of the two surrounding rocks.The results show that the stability of two surrounding rocks in the roadway is good, and the supporting scheme It has greatly reduced ore dilution rate and loss rate and provided safety guarantee for the mining operation, which has some promotion and use values.