阶段空场嗣后充填采场底部结构受开采扰动规律研究（增刊）

底部结构作为采场的薄弱环节,在阶段空场嗣后充填采矿中需要重点监测,结合某铁矿底部出矿结构巷道的工程实例,借助FLAC3D数值计算软件,分析了阶段空场嗣后充填全过程底部结构受开采扰动规律。开采扰动对阶段空场嗣后充填采场的底部结构稳定性的影响有时效性和阶段性。由于中间的矿柱起到了有效的隔离作用,相邻矿房的开采对底部结构位移的扰动影响程度较小。矿房回采完毕后,对采空区及时充填可有效控制采场的持续变形,同时为下一步矿柱的回采提供了安全保障。

Research on disturbance of bottom structure by excavation in sublevel open stoping backfilling

As weak link bottom, structure need to focus on monitoring in the sublevel open stoping backfilling. Based on the engineering case of bottom structure openings at one iron mine, the FLAC3D simulation software was used to analyze disturbance of bottom structure by excavation. Mining disturbance on the effect on the stability of bottom structure by excavation in sublevel open stoping backfilling has timeliness and periodically. Due to the effective isolation of the middle pillar, displacement of bottom structure affected by the disturbance degree is smaller by adjacent room excavation. Backfilling in time can control continuous deformation of stope effectively, at the same time provides security for the next step pillar stoping.