Construction of 3D coal seam model based on improved triangular prism element
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摘要: 现有三维煤层建模方法采用2次插值算法及传统三棱柱体构建煤层模型，导致误差较大。根据煤矿钻孔数据建立数据库，采用狄洛尼三角剖分算法及克里金插值法建立煤层二维曲面数据模型，形成三维煤层模型的上、下表面。结合三维钻孔模型，以改进的三棱柱体元为基本元组构建三维煤层模型，实现了三维煤层的可视化与煤层储量的自动计算。根据某煤矿的原始钻孔数据，采用基于改进三棱柱体元的三维煤层建模方法对该煤矿某工作面煤层进行建模并计算煤层储量，结果表明该方法较传统块段法的计算精度提高了4.82%。Abstract: Existing 3D modeling methods of coal seam use twice interpolation algorithms and traditional triangular prism to construct coal seam model, which lead to bigger error. Delaunay triangle subdivision algorithm and Kriging interpolation algorithm were adopted to establish 2D curved surface data model of coal seam according to drilling data of coal mine in a database, so as to form upper and lower surfaces of 3D coal seam model. An improved triangular prism element was taken as basic element to construct 3D coal seam model combined with 3D drilling model, so as to realize 3D visualization of coal seam and automatic calculation of coal reserve. According to original drilling data of a coal mine, 3D coal seam model in a working face was constructed by use of 3D modeling method of coal seam based on the improved triangular prism element and coal reserve was calculated with a more accurate result of 4.82% than traditional segment method.
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