摘要
在永平铜矿,由于露采速度远大于地采速度,目前该矿的露天坑底预留隔离层的厚度不断减小。为了确保矿山回采安全,采用CAD-3DMine-Flac3D等多软件耦合建模的手段,对现有隔离层的稳定性进行动态模拟和对比分析。研究结果表明,虽然目前隔离层厚度已低于有关规程要求的最小值,但爆破振动和矿体回采对隔离层影响很小,隔离层基本没有发生贯穿破坏,尚处于稳定状态;同时通过应力、应变及塑性区的变化分析,找出了稳定性薄弱环节,为矿山下一步排产决策提供了必要的技术支撑。
Since the rate of open mining is much higher than that of underground mining,the thickness of the isolation layer reserved at the bottom of Yongping copper mine is decreasing at present.In order to ensure the safety of mining at present stage,with the means of multi-software coupled modeling,including CAD,3 D Mine,FLAC~(3D)and so on,the stability of existing isolation layer was dynamically simulated and comparatively analyzed.The results showed that,the blasting vibration and mining of ore body had little effect on the isolation layer although the current thickness was lower than the minimum required by relevant regulations.The isolation layer was basically in a stable state without penetrating failure.Moreover,the weak points in stability were determined by analyzing the change of stress,strain and plastic zone.The study provided a necessary technical support for further decision of mine production scheduling.
引文
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