摘要
针对灵乡铁矿拟回采采空区内部分点柱对空区上覆岩层和地表设施的影响,采用有限元法对其回采过程进行了模拟,揭示了回采过程中点柱的应力变化规律及顶板的应力分布变化,证明了回采工作的可行性。结合回采过程中应力变化,建议采用方案二进行回采是比较安全的,同时建议在2号、5号点柱上布置声发射监测点。
In view of the influence of the recovery of residual point pillars at mined-out areas on the overlying strata and surface facilities in Lingxiang Iron Mine, the stoping process of the residual point pillars were simulated with FEM, indi- cating the stress change law and stress distribution of roof and verifying the feasibility of the recovery. According to the stress variety in the stoping process,it is recommended that the second stoping scheme be a lot safer and AE monitoring points be laid out at No. 2 and No. 5 pillars.
出处
《金属矿山》
CAS
北大核心
2013年第1期15-19,共5页
Metal Mine
关键词
采空区
点柱回收
数值模拟
声发射监测
Mined-out areas, Recovery of point pillars, Numerical simulation, AE monitoring
