不同开采时序下倾斜矿体覆岩稳定性数值分析

Numerical analysis of overburden stability of inclined ore body under different mining sequence

文章以某铁矿为工程背景,采用PHASE 2D有限元软件建立数值模型,研究了不同开采时序下倾斜矿体覆岩破坏及地表沉陷。结果表明:不同开挖时序对覆岩及地表变形影响显著,其中上、下部采区同时开采时,覆岩破坏程度最小,且地表位移并不大。综合考虑覆岩破坏及开采效率,优选上、下部采区同时开采方案。

Numerical models were established using PHASE 2 D to study the failure process of the inclined ore body and surface subsidence under different mining sequences. The results show that the mining sequence has a significant impact on the overburden movement and failure. When the upper and lower mining areas are mined at the same time, the overburden shows the least failure zones and acceptable surface subsidence. Considering both the overburden stability and production, it is recommended that the upper and lower mining areas should be mined simultaneously.