摘要
本文根据岩体自身的力学性质及其变化,讨论了具有挤压特征的正断层的成因。认为这些断层的形成有岩体本身的重力作用,同时也有应力松弛现象。岩体中的应力松弛现象是由流变学因素和非流变学因素引起的。由于松弛后岩体沿断层面滑动过程中,仍受到一定的挤压作用,因此易于出现粘滑现象,从而易于发生地震。
During working in field, the author has o ften seen some faults with steep dip angle which appear the form of normal fault but have the squeezed feature. The stress action way mirrored by the faults is contrary to regional stress field. Based on the functions of mechanical properties of rock bodies and their changes in tectonic activities, these contradiction phenomena are discussed. The mechanical properties of rock mainly include the gravity of rock body and the stress relaxation, and the author considers the relaxation in rock is caused by both aspects of rheology and non-rheology. Based on the idea, the relations between these factors and seismic activities are discussed, and some practical tectonic phenomena also are analysed.
出处
《西北地震学报》
CSCD
1989年第2期52-60,共9页
Northwestern Seismological Journal
