试论狭谷型水库诱发地震的一种原因和机理

TRIAL DISCUSSION ABOUT A CAUSALITY AND MECHANISM OF A TYPE OF CANYON RESERVOIR INDUCED EARTHQUAKE

本文讨论了狭谷型水库倾滑型和逆掩型地震交替发生的原因和机理,认为虽然前者震级很小,不易形成破坏,但有可能成为后者的诱发原因,后者的地震规模受断层尺度、走向、倾向、层面间的固结强度限制,有时可以诱发三级以上的地震。本文从孔隙压和应力的藕合作用,倾滑性地震的卸载作用出发,用摩尔园理论讨论了后者发生的原因和机理,认为在水库地震研究中,这种倾滑型、逆掩型地震交替发生的现象应该受到重视.

The causality and mechanism of dip slipping and reverse hid-ding earthquake which occurred alternately in a type of canyon reservoir are discussed in this paper. It thinks that although the magnitude of the former is small and it is not easy to cause any destruction, yet it is possible to become the induced factor of the latter.The earthquake scale of the latter are limited by yardstick, trend, dip, solid strength of fault plane and sometimes the induced earthquake of Ms=3 may occurred. This paper proceeds from the coincidence of hole pressure and stress, discharge of dip slipping earthquake and uses the theory of Moryuan to discuss the causality-and mechanism of the latter. It thinks that this phenomenon of dip slidding and reverse hidding earthquake which occurred alternately should be paid great attention in the study of reservoir earthquake.