【摘要】 在地应力实测资料匮乏的北疆阿尔泰地区,对某深埋引水隧洞进行了水压致裂法地应力场测试。实测结果与区域构造应力场的对比分析表明,研究区域为构造型应力场,最大水平主应力方位与地震的震源机制解一致,呈NNE向,与区域构造应力场相吻合;且埋深约300 m以上,平均水平应力与铅直应力的比值不再变小(接近1.0)。应加强该区深部构造应力场研究,重视现场实测手段的应用,提高对区域应力场的宏观把握,为指导类似深埋工程的设计和施工提供参考。更多还原

【Abstract】 Stress measurement data is in lack in Northern Xinjiang’s Altai region.We tested the stress field of a deep water diversion tunnel in this region by using hydraulic fracturing method.Test result and analysis reveal that the tested stress field is tectonic stress type and the maximum horizontal principal stress orientation is NNE,which is in consistency with the focal mechanism solution.Moreover,it reveals that the ratio of average horizontal stress to vertical stress changes no smaller(close to 1.0)in the depth of over 300 m.We should strengthen the research on tectonic stress field in deep area and pay attention to the application of in-situ measurement means to improve the macroscopic understanding of regional stress field.更多还原