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为了准确掌握某铜矿采空区失稳模式,确保矿山安全生产,针对该矿典型采空区处于爆破震动等动力扰动条件下的工程实际,运用FLAC3D软件建立动力扰动条件下的数值分析模型,对采空区进行失稳模拟分析,确定了采空区在动力扰动条件下的失稳模式。运用采空区三维信息获取及可视化建模技术,实现了采空区失稳模式的可视化实测验证。结果表明,该矿采空区在动力扰动条件作用下主要为顶板剪切破坏和矿柱剪切破坏复合失稳模式,实测结果与数值分析结果一致。从而形成了一种有效的采空区失稳模式分析和可视化实测验证方法,为矿山有效开展采空区安全分析及处理提供了可靠的技术支持。
In order to accurately grasp the instability mode of a copper mined-out area and ensure the safe production of mines, aiming at the engineering practice of the typical goaf in the mine under dynamic disturbance such as blasting vibration, the numerical analysis model under dynamic disturbance condition is established by using FLAC3D software. The mined-out area is simulated by instability analysis, and the instability mode of the mined-out area under dynamic disturbance is confirmed. By using the three-dimensional information acquisition and visual modeling technology in goaf, the visual verification of goaf instability mode is realized. The results show that under the condition of dynamic disturbance, the gob of the mine is mainly composed of shear failure of roof and shear failure of pillar, the measured results agree well with the numerical results. Thus, an effective mined-out area instability pattern analysis and visual verification verification method are formed, which provide reliable technical support for the effective mine safety analysis and treatment.