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以马城铁矿-900~-720 m阶段V矿体开采为研究对象,采用FLAC~(3D)数值模拟软件对其充填开采过程进行模拟研究得出:开挖后矿房肩角及顶板中间处出现应力集中现象,且随着相邻矿房开采,矿房顶板、上盘围岩、矿柱位置出现不同程度的以拉伸为主的破坏现象,塑性区呈不断增大的趋势;通过尾砂胶结充填,矿房围岩应力重新分配,原有矿房顶底板、两帮及矿柱集中应力减小,受力呈均匀分布趋势发展,顶板沉降和底板底鼓受到抑制,塑性区破坏减小,尤其是充填体周围的塑性区没有增大,说明充填体抑制了塑性区的发展,充填对采空区围岩变形控制效果显著。
Taking the mining of V-9 ore from -900 m to -720 m in the Macheng Iron Mine as the research object, the simulation study on the filling and mining process by using the FLAC 3D numerical simulation software shows that: after the excavation, the shoulder angle of the coal mine and the middle of the roof The phenomenon of stress concentration appears. With the exploitation of the neighboring mines, the extensional dominated damage occurs in the roof of coal mines, the surrounding rock and the pillars of the coal mines. The plastic zone shows a tendency of increasing. Tailings cementation and filling, the stress of rock mass in the mine’s house is redistributed. The original stress of the roof and floor of the mine, the concentration of the two gangs and the pillars are reduced, the stress is distributed evenly, the settlement of the roof and the floor drum are inhibited, Decreases, especially the plastic zone around the filling body does not increase, indicating that the filling body inhibits the development of the plastic zone. The filling has a significant effect on the deformation control of the surrounding rock in the goaf.