深切河谷区地应力场测试数据的统计分析

以某深切峡谷区应力解除法和水压致裂法实测数据为基础资料，运用统计分析方法对该区河谷和岸坡中的地应力场的特征进行分析，分别获得了整个坝区、河谷区和岸坡中最大水平应力的方向，以及河谷区最大水平应力量值与埋深的拟合方程。并根据岸坡中地应力场的变化特征，对空间地应力测试数据进行了筛选，最终获得了代表岸坡相对稳定区的地应力场的量值和方向。

STATISTICAL ANALYSIS OF TESTING DATA OF GEO-STRESSFIELD IN DEEPLY CUT VALLEY

Based on the analysis of the in-situ stress measurement data by hydraulic fracturing method and stress relief method, variable features of geo-stress field under the bottom of gorge and inside the hill are discussed by statistical analysis methods. Both of major horizontal stress directions and the relation between the magnitude of principal horizontal stress are obtained. At last, according to the variable features of geo-stress field, the directions and magnitudes of in-situ stress field in the relatively stable stress belt are suggested.