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本文按该水库的区域地质构造、地震活动背景与水库诱发地震的工程地质特征,将水库区划分为四个诱震环境的工程地质区段,并初步指出水库蓄水后可能潜在的水库地震的震中区及可能最大的震级。初步结论是:主要危险地段在Ⅰ区(即库首附近),最大可能的震级M_s<5级,影响到坝区的烈度不超过Ⅶ度(低于坝区的基本烈度),对坝区不会产生特殊不利影响,但应注意库首右岸的库岸滑塌以及大规模的滑塌所产生涌浪的影响。最大主震可能发生在满库前后。由于库盆是由第四纪的松软堆积物组成,在水位的多次变动所引起的库岸滑塌及黄河泥淤积的特点,可能很快在库首形成铺盖,起到阻挡库水沿断裂下渗的作用,而不利于诱发地震的继续发展。
Based on the geological structure of the reservoir, the background of seismic activity and the engineering geological characteristics induced by the reservoir, this paper divides the reservoir area into four engineering geological sections that induce the environment, and initially points out the possible reservoir seismic Epicenter area and possibly the largest magnitude. The preliminary conclusion is that the main danger area is in the area Ⅰ (near the reservoir head), the maximum possible magnitude M_s <5, which affects the intensity of the dam area not exceeding Ⅶ degree (lower than the basic intensity of the dam area) Will have special adverse effects, but attention should be paid to the effects of the surge caused by the landslide on the bank bank on the right bank of the reservoir and the large-scale slump. The largest mainshock may occur before and after the full library. As the basin basin is composed of Quaternary soft deposits, the slump of the reservoir bank and the siltation of the Yellow River caused by multiple changes in the water level may soon form a cover in the reservoir head and serve to block the reservoir water along the fault Infiltration of the role, but not conducive to the induced earthquake to continue the development.