摘要
为研究含无煤区和断层的煤层三维模型的自动构建方法,基于钻孔数据和二维煤层边界线及断煤交线,利用见煤钻孔与煤层顶、底板交点和插值得到的未见煤钻孔点,构建Voronoi图,确定未见煤钻孔的影响区域为无煤区边界线;通过钻孔与煤层顶、底板的交点,对煤层边界线、断煤交线、无煤区边界线上点和煤层顶、底板面上网格点的高程值进行插值;从两个方面对用于高程插值的距离反比加权插值方法进行改进,采用四分圆扇区搜索和钻孔工程数量优化邻近样本点,通过计算插值点和样本点连线与断煤交线的交点数量排除位于断层异侧的样本点;对已插值的内外边界线和网格点进行约束Delaunay三角剖分,分别建立煤层顶、底板表面;对逆断层的重叠区域按上、下盘分别进行断煤交线和网格点的高程插值以及表面建模,最终形成煤层三维模型.
Based on drill hole data, 2D coal seam boundary line and fault lines, techniques for automatic modeling of 3D coal seam with faults and no-coal area were studied. Point set containing intersection points of drill and seam roof or floor and interpolated points of no-coal drill was utilized to generate a Voronoi diagram,which was used to determine the no-coal area boundary line according to the affected region of no-coal drill. Elevation values of points belonged to coal seam boundary line, fault lines, no-coal area boundary lines and grid points of coal seam roof and floor were interpolated. Inverse distance weighting method used for elevation values interpolating was improved from two aspects. One was optimizing the neighbor sample points by quadrant search and amount constrained of drill,the other was excluding the sample points on the different side of the fault by calculating the number of intersection points between fault line and the line connecting interpolated point to sample point. Then, coal seam roof and floor surface model were built by constrained Delaunay triangulation of interpolated lines and grid points. The overlapping region of reverse fault was deal with individually, interpolating the elevation values twice of fault lines and grid points as hanging wall and foot wall separately and modeling the surface. Finally, the 3D model of coal seam was constructed by combining the surface model built previously.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2016年第3期243-247,共5页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(51174082)
煤矿灾害预防控制实验室河南省高校重点实验室培育基地项目(200925)
关键词
煤层
三维模型
自动建模
空间插值
断层
coal seam
3D detailed model
automatic modeling
spatial interpolation
fault
