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对于采用大直径深孔嗣后充填采矿法开采后留设的隔离中段上下均为充填体,为解决充填体下安全回采隔离中段矿体的难题,提出了增设辅助中段,采用大直径深孔和中深孔联合回采隔离中段矿体的研究方案,现场取得采矿损失率小于7%、贫化率小于5%,采场综合生产能力大于750t/d的良好指标,既较好控制了凿岩硐室的稳定性,又保证了高效、经济回采隔离中段矿体。
In order to solve the problem of safely recovering and isolating the ore body in the middle section under the filling body, an additional auxiliary middle section is proposed, and a large-diameter deep hole and a middle section Deep hole combined mining program for the isolation of the middle section of the ore body, the scene to obtain the mining loss rate of less than 7%, the rate of less than 5% dilution, stope comprehensive production capacity of more than 750t / d good indicators, both better control of the rock chamber Stability, but also ensure the efficient, economical recovery of the middle ore body.