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An algorithm for modeling 2D irregular columnar jointed rock masses
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DOI：10.1016/j.compgeo.2025.107093.png)
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Field investigations show that the cross-section of irregular columnar jointed rock mass (ICJRM) is composed of a variety of polygon mosaics where pentagons and hexagons account for the majority. A VSRD (Voronoi-based Seed Random Displacement) algorithm that can precisely control the proportions of pentagons and hexagons is proposed to model the cross section of ICJRMs. The algorithm consists of generating an initial seed set to produce a Voronoi diagram with special pentagon tessellation, transforming special pentagons into hexagons and other polygons through moving some initial seeds by a random displacement, and correcting the average equivalent diameter of the columns. Then the VSRD algorithm is employed to model five famous ICJRMs, and the geometric properties of the models are compared with field investigations of these ICJRMs. The results show that the proportions of pentagon and hexagon in the models are consistent with field investigations, and the consistency of the average equivalent diameter of the columns between models and natural ICJRMs can be achieved by introducing a correction factor, by which the reliability of VSRD algorithm is verified. Additionally, the 2D ICJRM models generated by VSRD algorithm can provide a new perspective for exploring the mechanical and hydraulic properties of ICJRMs through physical and numerical experiments.
Keyword:
Irregular columnar jointed rock mass
Columnar joint
Voronoi diagram
VRSD algorithm
期刊
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6.2
论文数:
7.2K
被引数:
2.9W
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