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    • Constructing the Regional Stress Profile Based on Multisource Regional Stress Data and the Significance of Fault Friction Strength

    Pu Wang,Chenghu Wang,Guiyun Gao,Xiangyun Guo

    Bulletin of Engineering Geology and the Environment（2023）

    National Institute of Natural Hazards

    Cited 0|Views16
    Abstract
    The investigation of the regional stress characteristics and frictional strength of geological structures in the Yishu fault belt is of great significance to earthquake prevention and disaster reduction in Shandong province, China. As per the comprehensive collection of geological backgrounds of the Yishu fault belt, we constructed the regional stress profile of it by using hydraulic fracturing in situ stress measurement, high-precision borehole televiewer logging, focal mechanism stress inversion, and modified stress polygon methods. Specifically, there were 152 stress direction data points obtained by using in situ measurements, the maximum horizontal principal stress direction was 92.28°, and the tensile fracture growth phenomenon was found within the test interval range. The regional focal mechanism solution was mainly of the strike-slip faulting type ( 50
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    Key words
    In situ stress,Yishu fault belt,Lateral pressure coefficient polygon,Stress profile,Fault friction strength,Stress shape ratio
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