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3D-DEM assessment of seismic instability in a naturally fractured wedge rock mass based on terrestrial laser scanning and DFN modeling
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DOI：10.1007/s10064-026-05214-5.png)
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Abstract
En 中文
The study of the dynamic process of rock slides is a global research hotspot in the field of geological disasters. A common investigation method is numerical simulation. In most numerical simulations, only the topographic features of the rock mass are considered but discontinuities are neglected. For this reason, we generated discontinuities in the rock mass by adding discrete fracture networks (DFNs) to discrete element numerical simulations. In this study the dynamic process of a potential unstable rock mass is investigated, especially considering the DFN and seismic forces. With the point cloud acquired from noncontact measurements and further calculations, This study quantitatively analysed various facets of an unstable rock mass, including its discontinuity production, division, spacing, and distribution pattern. A fine discrete element model is constructed on the basis of these comprehensive scanning outcomes and calculations. We subsequently investigate the dynamic process of the potential unstable rock mass under the natural conditions and seismic forces using discrete element numerical simulation software. The simulation results reveal that the unstable rock mass remains stable under natural conditions and does not present landslide risk. However, under seismic forces, the simulation forecasts potential landslides that could imperil the integrity of the infrastructure. Therefore, it becomes implementing proactive measures during the construction phase to mitigate these risks effectively is imperative. This work provides a new methodology for the study of dynamic process in related unstable rock masses and a technical description of integrated risk assessment and mitigation of unstable rock masses.
Keywords:
Wedge-shaped unstable rock mass
Seismic process analysis
Terrestrial laser scanning
Discrete element method
Automatic discontinuity detection
Discrete fracture network
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