FDEM simulation method and system for rock slope fracture instability

By combining the FDEM method with damping mechanisms and gravity acceleration control, the fracturing and instability process of rock slopes is accurately simulated, solving the problem of incomplete simulation in existing technologies and realizing accurate calculation of safety factors and quantitative assessment of slope stability.

CN121093433APending Publication Date: 2025-12-09WUHAN UNIV
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Patent Information

Application Number
CN202511183331.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2025-12-09

AI Technical Summary

Technical Problem

Existing technologies are insufficient to accurately simulate the entire process of a rock slope, from the initiation of cracks to the macroscopic movement of the block, especially at the actual engineering scale, which makes it impossible to accurately assess the risk of slope instability.

Method used

The FDEM method is adopted. A numerical model is constructed under initial conditions and gravitational acceleration is applied. Combined with hysteresis damping and viscous damping mechanisms, the gravitational acceleration is gradually increased until the kinetic energy change of the model meets the conditions. The final gravitational acceleration is recorded to determine the safety factor.

Benefits of technology

It achieves accurate simulation from microcrack evolution to macroscopic slippage, provides a safety factor with clear physical meaning, and provides a reliable basis for slope stability assessment and protection design.

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Abstract

The invention discloses an FDEM simulation method and system for rock slope fracture instability, and relates to the technical field of geotechnical engineering. The method comprises the following steps: acquiring rock mass mechanical parameters and three-dimensional morphological parameters of a target rock slope; based on the rock mass mechanical parameters and the three-dimensional morphological parameters, constructing a numerical model of the target rock slope by using an FDEM; configuring initial conditions for the numerical model, applying initial gravitational acceleration, and configuring updating conditions when the total kinetic energy of the numerical model is reduced to a preset value; after updating condition configuration is completed, increasing the gravitational acceleration step by step until the variable quantity of the total kinetic energy meets a preset condition, and recording the final gravitational acceleration; and determining the safety coefficient of the target rock slope according to the final gravitational acceleration. According to the invention, the whole catastrophe process of the rock slope from crack initiation and extension, sliding to block macroscopic movement can be accurately simulated, and the safety coefficient with clear physical significance is obtained based on the dynamic instability critical state.
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