某铁矿破碎岩体巷道支护参数优化设计

某铁矿围岩破碎，出矿巷道和分段运输巷道容易发生顶板掉块、冒落，加之采矿生产影响，巷道支护结构容易发生失效。应用松动圈支护理论，针对破碎岩体支护设计参数进行优化，推荐采用锚网喷联合支护方式，通过选取代表性巷道进行工业试验，证明优化支护参数后，支护方式适用于破碎岩体，支护效果得到了显著提高。

Optimization design of roadway support parameters for broken rock

In an iron mine, the surrounding rock is broken, and the roof of the ore drawing roadway and sublevel transportation roadway are prone to fall and caving. Combined with the influence of mining production, the supporting structure of the roadway is prone to fail. Based on the theory of loose circle support, the design parameters of fractured rock mass are optimized, and the Combined supporting of spray anchor net is recommended. Industrial tests are carried out by selecting representative roadways to prove that after optimizing the support parameters, the support method is suitable for fractured rock mass and the support effect is significantly improved.