Analysis on the Characteristic of Stress Field and its Influence on the Stability of Underground Water-sealed Oil Depot in Southern Jinzhou,Liaoning Province
Regional stress field is the driving force of tectonic movement and an important part of crustal stress research.Nowadays,tectonic stress is closely related to the storage and exploitation of geological resources and the design and implementation of infrastructure engineering.The detailed on-site hydraulic fracturing in-situ stress test is carried out on 9 boreholes in southern Jinzhou,and the stress state and rock burst risk are evaluated and predicted according to the strength and stress indicators.The results show that the maximum and minimum horizontal principal stress values in the survey area are 3.92-17.33 MPa and 3.00-8.93 MPa respectively,the vertical stress value is 0.80-4.58 MPa,the maximum horizontal principal stress direction is between N33°and 88°E,and the dominant direction is N72°E;the results of crustal stress evaluation show that the stress state is low to very low,and there is no rock burst risk near the underground plant house in the engineering area.
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