基于伪点剔除与四域样条插值的三维煤层建模

3D Coal Seam Modeling Based on Pseudo Point Elimination and Four Fields Spline Interpolation

三维煤层精确建模受地下断层、岩层、地势起伏等因素的影响,建模精度不高。为提高三维煤层建模的精度,提出一种基于伪点剔除与四域样条插值的三维煤层精确建模算法,通过伪点剔除方法对建模点进行预处理,筛选出其中的孤立点,进行剔除,其余非孤立点用于基本模型建立和基于映射的模型重构,采用四域样条插值方法对非孤立点进行建模,在建模中,将建模域分为起始域、延伸域、稳定域、收敛域共四个域,在不同域中,对不同的建模点进行匹配加权插值处理,经过四域联合滤波,实现四域样条插值,对建模效果起到平滑滤波作用,从而大大提高三维建模精度。仿真实验表明,新算法对于外界断层、岩层、地势起伏等具有很好的鲁棒性,三维建模精度提高,并且计算量明显较少。

In accurate modeling of three-dimensional, the result was affected by the underground coal faults, rock, undulat.ing terrain and other factors, so the modeling accuracy was not high. To improve the accuracy of three-dimensional model.ing of coal, an algorithm of three-dimensional coal seam modeling with pseudo point elimination and four fields spline inter.polation was proposed, the pseudo point was pretreated, and the isolated point was removed, the remaining non-isolatedpoint was used for establishing the basic model and rebuilding the model, the spline interpolation method was used for thefour domains of non-isolated point modeling, modeling, the modeling domain was divided into the starting field, extendingthe domain, stable domain and the convergence domain, in different domains, different modeling point of matching weight.ed interpolation was processed, filtering through four domains were combined to achieve the four domains spline interpola.tion, it played a role of smoothing filter in modeling, thus the accuracy of three-dimensional modeling was greatly im.proved. Simulation results show that the new algorithm has good robustness for external faults, rock, undulating terrain, the3D modeling accuracy was improved and the computation is less.