司家营铁矿阶段充填法开采流固耦合数值模拟

Numerical Simulation of Fluid-Solid Coupling for Level Longhole Stoping with Subsequent Filling in Sijiaying Iron Mine

为了开展司家营铁矿南区充填法采矿的可行性论证以及开采设计参数优化,通过渗流-应力耦合数值正交试验,建立了南区开采的优化模型,揭示地下开采对地表岩移和渗流场的影响。计算结果表明:采用充填法采矿,不会产生地面塌陷;开采过程中围岩中的水会向采空区涌出,主要集中在第一阶段和第二阶段的采场当中,可能产生危险,应提早防范。

In order to study the the feasibility of stoping-and-filling method and the optimal parameters of mining design in the southern district of Sijiaying iron mine,a model for the mining optimization of the southern district was established by seepage-stress coupling numerical orthogonal test.The effect of underground mining on ground rock movement and seepage field was revealed.The results showed that stoping-and-filling will not cause surface collapse,groundwater will gush into Goaf from surrounding rock in the course of mining,especially in stopes of the first and second level gushing water could introduce dangerous which should be preventing in advance.