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回收浅埋且有地表建筑物的矿体,完全不同于其他类矿体的开采,其属于“三下”开采的范畴,因此,安全高效回收建筑物下的复杂矿柱是亟待解决的难题。针对天马山金矿建筑物下浅埋矿柱安全回收的问题,利用“三下”开采和地表移动变形理论分析了采空区坍塌对上覆岩层的影响,采用萨道夫斯基公式计算了爆破振动对地表建筑物的影响。此外,结合矿柱回采过程的数值模拟,对比分析模拟结果与建筑物破坏评价标准,进而确定了最优的采场结构参数,为矿柱的安全回收提供了理论支撑。
The recovery of shallow and surface structures of the ore body, completely different from the other types of ore body mining, which belongs to the “three” mining area, therefore, safe and efficient recovery of complex pillars of buildings is urgent to be resolved problem. In view of the safety recovery of shallow pillars under buildings in Tianmashan Gold Mine, the influence of the collapse of goaf on the overlying strata is analyzed by using “three times” mining and surface deformation theory, which is calculated by the formula of Sadowssky The impact of blasting vibration on the surface of the building. In addition, combined with the numerical simulation of pillared mining process, the simulation results and the evaluation criteria of building damage are comparatively analyzed, and the optimal stope structure parameters are determined, which provides theoretical support for the safe recovery of pillars.