多采区同时开采下充填率对地表变形的影响性分析

Influence of filling rate on surface deformation under multi-cut zone simultaneous mining

地下采矿造成了严重的地表沉降变形,对采矿区埋地管网及地表设施带来重大安全隐患。马城矿采用上下两采区同时回填开采方式,运用数值模拟方法,针对该种开采方式下不同充填率对矿体剖面沉降和水平岩移的影响进行研究,结果表明:马城矿在不同充填率下各阶段开采过程中的覆岩及地表位移随着充填率的提高而降低。

Underground mining has caused serious sedimentary and deformed zones on the surface, which has brought major safety hazards to the buried pipe network and surface facilities in the mining area. Macheng Mine adopts the method of backfilling and mining at the same time in the upper and lower mining areas. At present, there are few studies on this mining method that has caused the surface settlement deformation. In this paper, the method of numerical simulation and theory are combined. Under the mining mode, the effects of different filling rates on the settlement of the ore body and horizontal rock movement are studied. It can get that the overburden and surface displacement decrease with the increase of the filling rate at different filling rates of different stages of the Macheng mine during the mining process.