同构造纤维状压力影及其应用

Syntectonic Fibrous Pressure Shadows and Their Application

同构造纤维状压力影形成于含有强硬物体的岩石的递进“裂开一愈合”作用.每次“愈合”作用中,生长的纤维轴向代表增量应变的最大拉伸方向.本文推导了利用压力影纤维进行增量应变分析和有限应变分析的计算公式及测量方法.

Syntectonic fibrous pressure shadows are casted during the deformation of rocks containing hard rock-masses by a progressive'rock cracking-sealing' process. During each rock sealing process, theaxial direction of the growth fibers represent the maximal elongation direction of incremental strainof rocks, and the growth pattern of the fibrous pressure shadows give a historical record of the incremental strain of rocks. In this paper, three main types of pressure shadows are recognized, formulasfor calculating total strains and in incremental strains of rocks on XY and XZ planes of the finitestrain ellipsoid are derived.