Abstract:The measurement results of in-situ stress by hydraulic fracturing in two boreholes are described in detail,including the depth of test section,the maximum and minimum horizontal principal stresses,and the test results of induced fracture impression. In addition,the characteristics of tectonics and topography of study area as well as the relevant rock mass properties are presented. According to the interpretation of test data,it is found that there exist considerable differences between the in-situ stress states of two boreholes which are only 280 m apart. With the aid of three dimensional finite element simulation technique,analysis on the distribution of in-situ stress in study area is carried out,and the influence of topography on in-situ stress state is studied.