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急倾斜极厚大矿体在采用阶段矿房法回采矿柱时存在采矿贫损大、成本高、凿岩作业困难、作业安全性差等问题,结合红岭矿生产实际并借鉴国内类似矿山生产经验,提出分段凿岩、顶板一次崩落、间柱分段崩落、间柱出矿结构连续出矿、封闭采空区的矿柱回收新方法。经现场试验,取得矿柱回采损失率33%、贫化率15.31%、采矿直接成本72.95元/t的较好指标,为类似矿山进行矿柱回收和采空区处理提供了一种有效的借鉴方法。
Extremely steeply inclined large orebodies mining mining pillar in the adoption of stage mining method exists large mining loss, high cost, difficult drilling operations, operating safety and other issues, combined with the practical production of Hongling mine and draw lessons from the similar production experience of mines , Put forward a new method of recovering ore pillars by sectional rock drilling, roof caving, sub-cavern subsidence, continuous mining of mined-out structure and closed mined-out area. After field test, the recovery rate of ore column is 33%, the depletion rate is 15.31% and the direct cost of mining is 72.95 yuan / t, which provides an effective reference for recovery and recovery of mined-out area in similar mines. method.