滨海大型金矿床取消矿柱及房柱交替采矿的新工艺

针对三山岛金矿条件，研究了深部开采取消点柱的工艺技术。首先，调查测试了矿岩物理力学参数，并对矿岩质量进行了分级。其次，在详细分析上下盘及矿体的物理力学特性的基础上，对三山岛金矿深部开采取消矿柱进行了有限元数值模拟，研究得出-555m水平以下矿体的开采可全面取消矿柱。最后，结合矿床条件，提出了房柱交替式盘区上向分层充填采矿新工艺。工业试验结果显示，该新工艺大幅度提高了单位面积开采强度，对岩层扰动小，盘区生产能力大，矿石损失贫化小，获得了显著的经济效益。此外，对三山岛金矿由于深部开采而导致的地表沉降利用ANSYS软件进行分析，同时对岩层变形进行了监测。结果表明，三山岛金矿深部开采取消矿柱和采用房柱交替采矿新工艺后能够有效控制岩层变形，从而可实现滨海大型金矿床安全高效低贫损开采。

Cancelling ore pillars in large-scale coastal gold deposit:A case study in Sanshandao gold mine,China

According to the actual conditions in Sanshandao Gold Mine, the cancelling ore pillars mining method was researched. Firstly, a series of tests for the physical and mechanical characteristics of rock mass were carried out and a quality classification system of rock mass applied in coastal metal deposit was established. Secondly, the reasonable demarcation depth of cancelling ore pillars was simulated using the finite element method, and the simulation results show that the ore pillars can be cancelled below the level of-555 m. Thirdly, a novel layer-backfill mining method of room-pillar alternation was designed to reduce the disturbance and settlement of terrain in mining area. Engineering practice shows that the new mining method enhanced the mining output and relieved rock disturbance. Furthermore, the settlement of the roof strata was small and no disaster occurred. The new mining technology effectively controlled the deformation of the terrain, indicating that the mining of the large-scale gold coastal deposit in Sanshandao Gold Mine was achieved safely, efficiently, and with a low loss rate.