Mining seismic events have been associated with the mining of hard coal in the Upper Silesian Coal Basin in Poland for many years. These seismic events pose a threat to people working underground and cause damage to construction facilities on the surface. It is possible to predict seismic vibrations from mining seismic events using numerical calculations. One such method is the spectral element method (SEM). In this method, synthetic seismograms that enable the imaging of the full waveform are calculated. A complex mechanism of the source is assumed by applying the seismic moment tensor, which best reflects the balance of forces in the source. This paper presents the results of SEM modeling of ground motions of a seismic event which occurred on November 8, 2018, in the Budryk mine with a magnitude of 3.8 on the Richter scale. The modeling results show that even if the calculated synthetic seismograms do not fully correlate with real vibration registrations, it is possible to determine the peak values of seismic vibrations at any point in the model. This method can be a good complement to the analytical methods used to assess seismic hazard caused by mining seismic events.

中文翻译：

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用谱元法模拟波兰煤矿的地震动

开采地震事件与波兰上西里西亚煤盆地中的硬煤开采有关。这些地震事件对在地下工作的人们构成威胁，并损害地面上的建筑设施。可以使用数值计算从挖掘地震事件中预测地震振动。一种这样的方法是光谱元素法（SEM）。在这种方法中，计算出能够对整个波形成像的合成地震图。通过应用地震矩张量来假设震源的复杂机制，它可以最好地反映震源中的力平衡。本文介绍了在2018年11月8日发生在Budryk矿的里氏震级为3.8的地震事件的地震动的SEM建模结果。建模结果表明，即使计算出的合成地震图与真实的振动记录不完全相关，也可以确定模型中任意点的地震振动峰值。该方法可以很好地补充用于评估由开采地震事件引起的地震危害的分析方法。