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有色金属(矿山部分):2019,71(6):1-4
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充填法转崩落法回采首采分段时上部岩体破坏、运移规律
((西南科技大学 环境与资源学院,四川 绵阳 621010))
Upper rock mass destroy and migration rule in the first mining section by filling method to caving method
((School of Environment and Resource, Southwest University of Science and Technology, Mianyang Sichuan 621010, China))
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中文摘要: 运用FLAC3D数值模拟,研究下向分层胶结充填采矿法改为无底柱分段崩落采矿法回采首采分段回采过程中上部岩体破坏、运移规律。结果表明:随着回采工作面不断推进,上部岩体最大下沉点的位置向回采工作面走向中间位置靠拢;采空区前后两侧应力集中明显在增大,在充填体和氧化矿交界处出现了最大主应力的突变;塑性区在回采方向上随着工作面的推进整体呈现“阶梯形”发育。上部岩体的破坏、运移是导致采场矿山压力显现的根本原因,准确了解上部岩体破坏、运移规律,为控制采场的冲击地压提供依据,同时可为同类矿山开采提供借鉴。
中文关键词: 数值模拟  塑性区  冲击地压
Abstract:Study on the law of upper rock mass destruction and migration in the process of first mining by bottomless sublevel caving mining method instead of downward layered cement filling mining method was investigated by using FLAC3D numerical simulation. Results indicated that with the continuous advance of the mining face, the position of the maximum subsidence point of the upper rock mass was close to the middle position of the mining face; and the stress concentration on both sides of the goaf was obviously increasing, with a sudden change in the maximum principal stress occurred at the junction of filling body and oxidized ore. The plastic zone appeared “V” development along the advancement of the working face in the mining direction. The destruction and migration of the upper rock mass was the root cause of the pressure on the mining site. The damage and migration of the upper rock mass was accurately explored, which can provide a basis for controlling the rock burst in stope and a reference for similar mines.
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贾 达,陈星明,孙宇超,莫 超.充填法转崩落法回采首采分段时上部岩体破坏、运移规律[J].有色金属(矿山部分),2019,71(6):1-4.
JIA Da,CHEN Xingming,SUN Yuchao,MO Chao.Upper rock mass destroy and migration rule in the first mining section by filling method to caving method[J].NONFERROUS METALS(Mining Section),2019,71(6):1-4.

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