Numerical simulation method and system for whole process of rock and ore fracture under impact load based on FDEM

CN121920156BActive Publication Date: 2026-05-29KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Filing Date
2026-03-25
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional numerical simulation methods involve large computational loads, cumbersome parameter calibration, and strong dependence on mesh generation methods when simulating the rock and ore fracturing process under impact loads, resulting in high computational costs and inaccurate results.

Method used

The continuous medium structure is discretized into triangular elements using the FDEM method. Combined with a three-dimensional finite element mesh generator and an unstructured Delaunay triangulation algorithm, material parameters and penalty parameters are set. Contact forces are calculated using MultiFracS software and the NBS contact algorithm. Nodal coordinates and velocities are updated using Newton's second law.

Benefits of technology

It improves simulation efficiency and accuracy, reduces computation time and errors, and can more accurately simulate crack propagation, stress field and energy evolution of rocks under impact loads.

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Abstract

The present application relates to the technical field of rock dynamics numerical simulation, in particular to a numerical simulation method and system for the whole process of rock and ore fracture under impact load based on FDEM, which comprises the following steps: discretizing the continuous medium structure into a finite element network composed of triangular elements through FDEM, and constructing a rock and ore impact test model; setting material parameters and impact velocity boundary conditions according to the rock and ore impact test model; establishing a normal contact force calculation model and a tangential contact force calculation model according to the material parameters and impact velocity boundary conditions, and obtaining the coordinate and velocity update results of the triangular element nodes in combination with Newton's second law and the calculation model; and performing visual analysis based on the coordinate and velocity update results to output the crack propagation, stress field and energy evolution results under impact load. The present application can accurately simulate the crack propagation, fracture mode and energy evolution law of rock and ore under impact load, quantitatively study the rock and ore crushing characteristics and energy evolution law, and provide a calculation method for the rock and ore crushing mechanism research.
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