用电子版传统地质报告构建煤炭勘探区三维地质模型方法与软件研究

Study on Coal Exploration Area 3D Geological Modeling Method and Software through Traditional Geological Report Electronic Version

本文探讨将电子版的传统地质报告转化为三维地质模型的技术方法。首先分析了传统地质报告中可用于三维地质建模的主要数据源,认为煤层底板等高线图和勘探线剖面图是两种主要的数据源;然后分析了由电子版的传统地质报告构建三维地质模型的技术关键是由煤层底板等高线构建煤层底板曲面的不规则三角网、断层曲面的三角网和将二维剖面转化为三维剖面。讨论了三维建模前的数据预处理:将打断的等高线接起来;仔细处理等高线与断面交线相遇时的“未及”与“过伸”;为等高线赋高程;用等高线为断面交线赋高程。提出了半自动分区构建被断层切断的煤层底板曲面的方法。给出了断层曲面的两种构建方法:相邻煤层底板等高线图的断面交线相连;相邻剖面图上断面交线相连。讨论了煤、岩层体的构建方法中煤层顶板曲面和侧环面的构建。指出了今后煤田勘探队在编制地质报告的图件中应该注意的几个问题。

The paper has discussed the technical method to transform traditional geological report electronic version into 3D geological model.Firstly has analyzed main data sources in traditional geological report can be used in 3D geological modeling,considered that coal floor contour map and exploration line section are two main data sources.Then analyzed technical key of through traditional geological report electronic version to establish 3D geological model is from coal floor contour establishing coal floor curved surface triangular irregular network,fault curved surface triangular network and 2D section transformed into 3D section.Then discussed data preprocessing before 3D modeling:connect the interrupted contour lines;carefully deal with the"undershot"and"overshot"when contour intersected fault line;giving elevation to the contours;through contours giving elevation to intersection with section.A method of semi-automatic partitioning to construct curved surface of coal floor cut off by fault is proposed.Two methods of constructing fault curved surface are given:fault intersection lines with contour maps of adjacent coal seam floors are connected as skeleton lines;fault intersection lines of adjacent sections are connected as skeleton lines.Construction of coal roof curved surface and side ring surface of coal seam in construction method of coal and strata has been discussed.Several notes that the coalfield exploration team should pay attention to in the compilation of geological reports in the future are given.