1005-2763
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某铁矿嗣后充填采场单侧揭露充填体稳定状态研究
Study on the stability of unilateral exposed filling body in subsequent filling stope
嗣后充填矿山二步骤回采时两侧一步揭露充填体的稳定性是安全回采的关键。通过数值模拟和现场监测手段对某铁矿5371采场一步充填体单侧揭露条件下不同位置的应力和位移状态进行了研究，结果表明：① 揭露充填体底部测点的垂直应力变化最大，约为0.48 MPa；顶部且越靠近揭露面测点的水平位移越大，最大水平位移约32 mm。② 二步骤矿柱的回采速率与揭露充填体的最大垂直应力和最大水平位移值均呈对数关系；不同开挖次数对充填体底部垂直应力的影响较小，约为1.92%，不同开挖次数对充填体顶部水平位移的影响较大，约为5.65%。③ 现场监测结果显示，二步骤回采时，单侧揭露充填体中部应力变化较大，约为0.3 MPa，顶部测点水平位移最大，约为30 mm，与数值模拟结果基本一致。研究结果可为该铁矿二步骤回采工作的安全提供保障。
The stability of unilateral exposed one-step filling body is the key to safe mining in the two-step mining. The stress and displacement at different positions of the one-step filling body in the 5371 stope of an iron mine were studied by means of numerical simulation and field monitoring. The results show that: ① The vertical stress of the measuring point at the bottom of the exposed filling body changes the most, about 0.48 MPa. The closer to the top of the exposed surface, the greater the horizontal displacement of the measuring point, and the maximum horizontal displacement is about 32 mm. ② The excavation rate of the two-step pillar is logarithmically related to the maximum vertical stress and maximum horizontal displacement of the exposed filling body. Different excavation times have little effect on the vertical stress at the bottom of the filling body, which is about 1.92 %. And, different excavation times have a great effect on the horizontal displacement of the top of the filling body, which is about 5.65 %. ③ The field monitoring results show that the vertical stress change in the middle of the unilateral exposed filling body is largest than that in the top measuring point during the two-step stoping, and the maximum value is 0.3 MPa. The maximum horizontal displacement occurs at the top of the filling body, reaching 30 mm, which is basically consistent with the numerical simulation results. The research results provide a guarantee for the safety of the two-step stoping of the iron mine.
嗣后充填；充填体单侧揭露；数值模拟；现场监测.
Subsequent filling; Unilateral exposure of filling body; Numerical simulation; Field monitoring.
张 金,刘 毓
ZHANG Jin
1.山东金鼎矿业有限责任公司;2.矿冶科技集团有限公司
Shandong Jinding Mining Co,Ltd,Zibo
kyyjykf/article/abstract/k20240530004