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Whole-mine subsidence over tabular deposits and related seismicity

机译:板状沉积物的全矿沉陷及相关地震活动性

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摘要

The challenge of estimating mine-wide subsidence and linkages to seismicity over tabular deposits is addressed by a special finite element technique(dual node–dual mesh). Subsidence and mine-induced seismicity begins near the face when caving occurs and propagates to the surface as extraction reaches a critical extent. Thus, the challenge is to obtain details at the face at the meter scale and also at the surface over the whole mine at the kilometer scale. Interactions between old and new sections of a mine are automatically taken into account with this technique. The finite element method is well established technology based on fundamentals of physical laws, kinematics and material laws. With this technique, no empirical ‘‘scaling' or fitting computer output by input data ‘‘adjustment' to mine measurements is necessary. Capability is demonstrated for doing practical whole-mine subsidence analysis from first principles. Mine-induced seismicity is shown to correlate well with face advance and element failure.
机译:通过特殊的有限元技术(双节点-双网格)解决了估算板状沉积层全矿沉陷和与地震活动性联系的挑战。崩落发生时,塌陷和地雷诱发的地震活动开始于工作面附近,并随着开采达到临界程度而传播至地面。因此,面临的挑战是在米级的整个工作面以及在整个矿井的千米级别获得地表细节。使用该技术会自动考虑矿山新老部分之间的相互作用。有限元法是基于物理定律,运动学和物质定律的基础的成熟技术。借助这种技术,无需通过经验数据的“缩放”或通过输入数据“调整”来拟合计算机输出以进行矿山测量。事实证明从第一原则进行实际全矿沉陷分析的能力。地雷引起的地震活动与井面推进和单元破坏有很好的相关性。

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