黄河小浪底水库诱发地震危险性初步评价

Preliminary Evaluation on the Seismicity Risk Induced by Xiaolangdi Reservoir on Yellow River

根据黄河小浪底地区的地球动力学环境,本文采用扩容一沟通(DL)模式,对小浪底水库诱发地震进行了分析和计算。结果表明,位于水库淹没区的塔底断层北段、东段和石井河断层西段是危险性最大的三个潜在诱发地震源,而对大坝危害最大的震源是连地断层,但它们的最大震级都不会超过5.0级。此外,对于预防诱发地震发生,本文也提出了建议。

Based on the geophysical dynamic environment of Xiaolangdi area, the analysis and calculation for the seismicity which can be induced by Xiaolangdi reservoir under plan on Yellow River were made by using the model Dilatancy-Link. The results shows that the east and north parts of Tadi fault and the west Shijinhe fault are the more possible sources of induced seismicity and the Liandi fault is the most affecting the dam. However, the earthquak magnitudes all do not excess 5.0. A suggestion how to avoid the seismicity induced by the reservoir is presented in this paper.