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本文用地震学方法推测了乌溪江水库诱发地震的地质条件:利用不同方向爆破地震波资料,分析了库区主要断裂的活动性,推断了控震构造;根据不同库段、不同深度介质Q值的变化特征,解释了库区诱发地震的介质条件;用库区地震P波的初动参数计算了地震应力降,并以此为依据,估计了主要发震地区的应力水平。同时,对该水库震中分布较为集中的现象,给出了一定的解释。
In this paper, the geological conditions of the Wuxijiang Reservoir induced earthquake are inferred by seismological methods: by using blasting seismic wave data in different directions, the activity of the main faults in the reservoir area is analyzed, and the seismogenic structure is inferred; the Q value of the medium according to different reservoir segments and different depths The characteristics of the changes explained the medium conditions of the earthquake induced by the reservoir area; the earthquake stress drop was calculated using the initial parameters of the P wave in the reservoir area, and based on this, the stress level of the main earthquake-producing area was estimated. At the same time, given the fact that the epicentre of the reservoir is relatively concentrated, a certain explanation has been given.