某典型采空区失稳模式分析及可视化验证

Analysis and visual verification of a typical cavity instability mode

针对某铜矿典型采空区的工程实际,运用FLAC3D软件对采空区失稳进行模拟分析,确定了采空区分别在静力作用和动力扰动条件下的失稳模式.结果表明,该矿采空区在静力条件下主要为矿柱剪切破坏失稳,在动力扰动条件下则表现为顶板剪切破坏和矿柱剪切破坏复合失稳,实测结果与数值分析结果一致.为矿山有效开展采空区安全分析及处理提供可靠的技术支持.

Aimed at engineering reality of certain copper mine typical cavity, this paper adopts the software of Flac3D to simulate and analyze the instability cavity, and it determines the possible instability modes in static and dynamic disturbance conditions. Results show that it exists the failure mode of cavity under the condition of static mainly for bearer shear failure, while under dynamic disturbances it does mainly for composite the roof shear failure with bearer shear failure. The measured results and the numerical analysis results are consistent, which provides reliably technical supports for effective safety analysis and cavity disposal.