断层折射与断层封闭性的关系

不同力学性质岩层的内摩擦角不同，使它们的剪裂角不同，在同样力学条件下形成的断层是由许多倾角有差别的小断面折线状连接构成的断裂带，这种现象被称为断层折射。因此，断裂带两侧不同部位的岩层接触紧密程度有差异（可分为５类：挤压的，承载的，滑动的，微张开的，张开的），导致不同部位断面封闭性的差异（根据断层运动方式和受力情况，定性分为５类：良好，好，较好，较差，差）。认为生长断层封闭性与其位移速率及被错移的岩层岩性有关，生长指数越大越有利于断层封闭；正断层发生反转后，断面封闭性得到加强。图４参１０（王孝陵摘

Relations between fault refraction and fault sealing

Rocks with different mechanical properties have difference in their shear fracture angle because of the variety of their internal friction angle. Under same conditions one fault plane is consisted of many small fault planes which have different fracture angles, this is termed as fault refraction. Therefore, the compressive degree of the layers is different between the two sides of the fault in the crosssection (it may be divided into five types, i.e., compressive, loaded, sliding, less pulled apart and pulled apart), leading to the variance of the fault sealing in different depths (based on the fault movement methods and the compressive degree, the fault sealing may be qualitatively classified into five kinds, i.e., best, better, fine, bad and worse). Authors consider that the growth fault sealing is related to its movement speed and the layers Author shifted; the more bigger is the growth index, the more better is the fault sealing. If the normal fault is inversed, the sealing of the fault surface will be strengthened.