地壳应力值的估算方法

THE ESTIMATION METHODS TO DETERMINE THE STRESS IN THE EARTH 'S CRUST

本文提出了不通过地应力测量,确定工程岩体地应力值的断裂判据法和地震波断裂力学反演法。断裂判据法仅需确定野外最新构造体系断裂参数和岩体物理力学参数,便可确定不同新构造活动区的现代地应力值或下限值。地震波断裂力学反演法仅需要收集地震资料,测定岩体物理力学参数,便可确定区域平均剪应力τ_0;结合现代地应力场类型和最大主应力方向,可确定主应为值。

In this paper the fracture criteria method and seismic wave method to deter-mine the stress field in the earth's crust were put forward. The stress value in different neotectonic active regions could be determined by the fracture criteria method if the fracture character and rock mechanical property were known. Based on the theory of rock fracture mechanics, the average value of regional shear stress to could be calculated from the seismic waves, and the principal stress could be determined after the major principal stress axis and stress field type were affirmed.