小浪底水利枢纽对断层活动性的影响分析

Analysis on Effects of Xiaolangdi Reservoir to the Activity of Faults

通过对小浪底水库4条断层进行监测,分析各断层的活动性及其与水库运行的关系。研究发现:水库蓄水运行后,水的物理化学作用使得岩体强度降低,断层两盘的摩阻力和抗滑稳定系数减小,断层稳定性降低,断层活动性增强,因此,小浪底水库存在诱发崩塌、滑坡、地震灾害的可能性。

This paper analysed the activity of each fault and its relationship with the reservoir operation through monitoring the Xiaolangdi Reservoir＇s four faults. The study found that after reservoir impounding,the physical and chemical roles of the water reduced the intensity of rock body ,decreased the friction resistance and anti-sliding stability coefficient of two fault walls as well as the stability of fault, and it also enhanced the activity of faults. Therefore, the Xiaolangdi Reservoir induced the possibility of landslides, collapse and earthquake.