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断层滑移型岩爆事件已经成为影响地下矿山安全开采的重大问题。为深入了解断层滑移型岩爆事件对岩体及支护系统的影响,采用三维离散元程序3DEC,开展断层滑移的数值模拟研究。通过比较常用的震源模型,根据断层滑移形状及滑移特征,构建基于改进Haskell模型的断层滑移型岩爆震源模型。从荷载施加、断层面滑移及震源远区岩体质点振动响应等方面,验证改进的Haskell模型在模拟断层滑移方面的有效性。改进Haskell模型的计算结果与位移理论计算公式、质点振动速度经验公式等结果一致,结果表明,改进的Haskell模型能够很好模拟断层滑移震源特征以及合理的岩体震动响应。
Fault-slip rock burst has become a major issue affecting the safe mining of underground mines. In order to understand deeply the influence of fault rockburst on rock mass and supporting system, a 3D discrete element program (3DEC) is used to study the numerical simulation of fault slip. Based on the commonly used source model, the fault slide rockburst model based on the improved Haskell model is constructed according to the slip shape and slip characteristics of the fault. The effectiveness of the modified Haskell model in simulating fault slip is verified from the aspects of load application, fault plane slip and the rock mass particle vibration response in the distant source region. The results of improved Haskell model are in good agreement with displacement theory and empirical formula of particle vibration velocity. The results show that the improved Haskell model can well simulate fault source characteristics and reasonable rock mass vibration response.