利用地应力实测数据讨论地形对地应力的影响

首先详细描述了研究区域内2个钻孔的水压致裂地应力测试结果，包括测试段深度、最大和最小水平主应力的量值以及诱发破裂的印模定向试验结果。此外，还对测区内地质构造、地形地貌条件以及地层岩性进行了简要的介绍。经过对地应力测试结果以及相关数据的初步分析，发现对于相距仅280m左右的2个钻孔，其地应力状态及其分布规律存在较大的差异。为此，结合三维有限元数值模拟技术，对研究区域的地应力赋存状态和分布规律进行了更为详尽的分析，进一步研究和讨论了地形条件对地应力状态的影响和控制作用。

STUDY ON INFLUENCE OF TOPOGRAPHY ON IN-SITU STRESS BY INTERPRETATION OF MEASUREMENT DATA OF IN-SITU STRESS

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.