NUMERICAL SIMULATION OF STRUCTURAL FRACTURES CONTROLLED BY REVERSE FAULT

GAO Xiao-qiao; ZHANG Da

Volume 21 Issue 1

Mar. 2015

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Article Navigation > Journal of Geomechanics > 2015 > 21(1): 47-55

GAO Xiao-qiao, ZHANG Da, 2015. NUMERICAL SIMULATION OF STRUCTURAL FRACTURES CONTROLLED BY REVERSE FAULT. Journal of Geomechanics, 21 (1): 47-55.

Citation:

GAO Xiao-qiao, ZHANG Da, 2015. NUMERICAL SIMULATION OF STRUCTURAL FRACTURES CONTROLLED BY REVERSE FAULT. Journal of Geomechanics, 21 (1): 47-55.

Citation:

GAO Xiao-qiao, ZHANG Da, 2015. NUMERICAL SIMULATION OF STRUCTURAL FRACTURES CONTROLLED BY REVERSE FAULT. Journal of Geomechanics, 21 (1): 47-55.

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NUMERICAL SIMULATION OF STRUCTURAL FRACTURES CONTROLLED BY REVERSE FAULT

GAO Xiao-qiao^1
,,
ZHANG Da^{1, 2}

1.
Faculty of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China

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Abstract

Abstract

Based on the research on development of structural fractures that controlled by reverse fault, this study has simulated the distribution of the stress, strain and the development rules of fractures under the different conditions of horizontal forces, lithological characters, fault dip and the different distances to fault location in the fault zone by using COMSOL finite element software. It is shown by the simulation results that the development degree of structure fractures increases linearly with the increase of horizontal forces. The strain generated before rock failure can be used to describe the brittle properties of rock. Compressive strength is the main factor that makes rocks rupture and the shear strength of rock has relationship with the development of rock fracture. There is a critical angle in reverse fault dip and it can make the fracture strongest developed. The fracture density decreases as the distance from the reverse fault increases and there is a damage region controlled by reverse fault where the fracture density decreases sharply. This region is closely related to the mechanics, scale, displacement of the reverse fault and rock mechanics parameters.
- reverse fault,
- numerical simulation,
- structure stress field,
- structural fracture

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References

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