摘要
本文在总结单一剪切断层尾端张性区张裂扩展特征的基础上,进行了纯剪切和张剪切力学条件下雁列和羽列剪切带尾端张性区构造发展的粘土模拟实验和光弹实验,并作了相应的理论分析,指出羽列和雁列剪切带端部前方扩展受阻是其尾端张性区构造发育完善的必要条件;剪切带作为一个有机的整体,在运动学行为上与单一剪切断层相类似,因而能产生复杂的尾端张性区构造,且羽列和雁列剪切带的尾端张性区是有明显差别的。最后还简要地讨论了剪切带及其尾端张性区内的地震危险性问题。
This paper deals with the structural development in the tens ilc areas at the terminations of a shear zone made of several echelon faults by the soil experiments on the base of the discussing the features of the normal faulfing at the terminations of a single shear fault. Studies indicate that the thicker barriers nearby the terminations are the necessary conditions in which structures completely develop in tensile areas . A shear zone acts just like a single shear fault. So, there exists complicated structural pattern in the tensile areas at the terminations. At last, the problems such as earthquake risks are briefly discussed.
出处
《华北地震科学》
北大核心
1990年第3期40-46,共7页
North China Earthquake Sciences
