THE ANALYSIS ABOUT CHARACTERISTICS OF IN-SITU STRESS FIELD IN XINJIANG TIANSHAN AREA

The construction of the western region in China is accelerating gradually with the development of national economy. Exploring the characteristics of regional in-situ stress field can provide references to scientific research, mitigation of earthquake disasters and engineering construction. The article resumes four measurement methods widely used in Tianshan region which include hydraulic fracturing, overcoring method, earthquake focal mechanisms and fault slip data. Based on fundamental data base of crustal stress environment in continental China, this paper disposed the locations, depths, values, orientations and dips for in-situ stress measurement in recent years by means of literature search. The disposed data shows that the locations of in-situ stress measuring were widely distributed in Tianshan area. And the orientation of the maximum principal stress is N-S; the intermediate principal stress is W-E; the minimum principal stress is WWN-EES.The relationship of principal stresses is H h v.The state of in-situ stress in Hutubi area can be got by fault slip data. The orientation of 1 in Hutubi is N19W; and 3 is N71E which closes to horizontal. The dip of 2 is 78which closes to vertical. The orientations of principal stresses in Hutubi area which correspond Tianshan area, however, the relationship of principal stresses is H v h.The relationship of in-situ stress between Hutubi area and Tianshan area can be discovered by disposal of the in-situ stress measuring data in Tianshan area. It can provide reference to engineering construction in Hutubi area.