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Geomechanics and Engineering Volume 23, Number 2, October25 2020 , pages 127-137 DOI: https://doi.org/10.12989/gae.2020.23.2.127 |
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Experimental research on the evolution characteristics of displacement and stress in the formation of reverse faults |
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Shao J. Chen, Zhi G. Xia, Da W. Yin and Zhao W. Du
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| Abstract | ||
| To study the reverse fault formation process and the stress evolution feature, a simulation test system of reverse fault formation is developed based on the analysis of reverse fault formation mechanism. The system mainly consists of simulation laboratory module, operation console and horizontal loading control system, and data monitoring system. It can represent the fault formation process, induce fault crack initiation and simulate faults of different throws. Simulation tests on reverse fault formation process are conducted by using the simulation test system: horizontal loading is added to one side of the model. the bottom rock layer cracks under the effect of the induction device. The crack dip angle is about 29o. A reverse fault is formed with the expansion of the crack dip angle towards the upper right along the fracture surface and the slippage of the hanging wall over the foot wall. Its formation process unfolds five stages: compressive deformation of rock, local crack initiation, reverse fault penetration, slippage of the hanging wall over the foot wall and compaction of fault plane. There is residual structural stress inside rock after fault formation. The study methods and results have guiding and referential significance for further study on reverse fault formation mechanism and rock stress evolution. | ||
| Key Words | ||
| reverse fault formation process; simulation test; system development; fault crack initiation; evolution of stress deformation | ||
| Address | ||
| Shao J. Chen: State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, China Zhi G. Xia, Da W. Yin and Zhao W. Du: School of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China | ||