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Rapid assessment of the spatial extent of strong ground motion in mines - ShakeMap approach

机译：快速评估矿井强大地面运动的空间程度 - 沙玛映射方法

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Rapid assessment of areas that may experience damage during large seismic events is an important task of seismic monitoring in rockburst-prone mines, particularly in the seconds to hours following the event. Correctly installed sensors of the appropriate type allow instantaneous and accurate measurement at the location of the sensor. However, the ground motion at any point in the mine could be of interest. Traditionally, this assessment at locations away from sensors was estimated using ground motion prediction equations (GMPEs); specially calibrated equations describing the relationship between ground motion, event strength (radiated seismic energy or seismic potency) and distance. However, the uncertainty in these equations is often quite significant due to complexity of the problem, e.g. radiation pattern effects, extended seismic sources, variations in attenuation characteristics, and uncertainty in source parameters. We improve the accuracy of these estimations by combining the measurements at sensors with a GMPEin an approach known as ShakeMap, popular in crustal seismology. This allows for rapid and more accurate estimation of ground motions at any location following a large event. This knowledge can play an important role in planning of potential post-event evacuation operations and damage assessments. The method is demonstrated on examples from an Australian sublevel caving mine.
机译：在大型地震事件中可能经历损坏的区域的快速评估是摇滚沼地矿山抗震监测的重要任务，特别是在事件之后的几秒钟内。正确安装的适当类型的传感器允许在传感器位置处瞬时和精确测量。然而，矿井任何点的地面运动可能是兴趣的。传统上，使用地面运动预测方程（GMPE）估计远离传感器的位置处的该评估;专门校准的方程，描述了地面运动，事件强度（辐射地震能量或地震效力）与距离之间的关系。然而，由于问题的复杂性，这些方程中的不确定性通常是非常重要的，例如，辐射模式效应，扩展地震源，衰减特性的变化，以及源参数中的不确定性。通过将传感器的测量与称为Shakemap的方法相结合来提高这些估计的准确性，这些估计是一种称为Shakemap的方法，在地壳地震学中流行。这允许在大型事件之后的任何位置快速更准确地估计地面运动。在规划潜在的事件后疏散行动和损害评估方面，这知识可以发挥重要作用。该方法在澳大利亚浮雕矿井的示例上进行了说明。

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