CAJ | 학술논문

三维地层建模与可视化是三维地理信息系统( Geological Information System,GIS)在地学中的重要应用,能够直观展现各类复杂的地质信息,对于实际地质分析大有帮助. 为此,提出了一种基于引入四面体格网( Tetrahe-dral Network,TEN)的广义三棱柱(Generalized Tri-prism,GTP)模型的三维地层模型构建方法. 该方法使用钻孔数据进行三维地层建模,首先以钻孔孔口数据生成地表面不规则三角网( Triangulated Irregular Network,TIN) ,然后根据地层空间分布顺序,将TIN中的三角形逐个沿钻孔向下扩展生成GTP体元模型,建立三维地层模型并对其进行四面体剖分,最后使用可视化工具包( Visualization Toolkit,VTK)开发出三维地层可视化系统,实现了地层模型的三维显示及属性查询,距离、角度量测与剖切等空间分析功能. 某矿山钻孔数据试验结果表明:基于引入TEN的GTP模型有助于解决空间实体剖切问题,将VTK应用于实现三维地层可视化是可行的,在可视化性能与空间分析操作等方面均有着良好的效果,对于提高矿山地质分析、地质建模与可视化效率有一定的参考价值.
삼유지층건모여가시화시삼유지리신식계통( Geological Information System,GIS)재지학중적중요응용,능구직관전현각류복잡적지질신식,대우실제지질분석대유방조. 위차,제출료일충기우인입사면체격망( Tetrahe-dral Network,TEN)적엄의삼릉주(Generalized Tri-prism,GTP)모형적삼유지층모형구건방법. 해방법사용찬공수거진행삼유지층건모,수선이찬공공구수거생성지표면불규칙삼각망( Triangulated Irregular Network,TIN) ,연후근거지층공간분포순서,장TIN중적삼각형축개연찬공향하확전생성GTP체원모형,건립삼유지층모형병대기진행사면체부분,최후사용가시화공구포( Visualization Toolkit,VTK)개발출삼유지층가시화계통,실현료지층모형적삼유현시급속성사순,거리、각도량측여부절등공간분석공능. 모광산찬공수거시험결과표명:기우인입TEN적GTP모형유조우해결공간실체부절문제,장VTK응용우실현삼유지층가시화시가행적,재가시화성능여공간분석조작등방면균유착량호적효과,대우제고광산지질분석、지질건모여가시화효솔유일정적삼고개치.
Three-dimensional stratum modeling and visualization are the important application of three-dimensional geo-logical information system ( GIS) in geosciences,and it can completely and unambiguously define the various geologic struc-tures information,which is very helpful for actual geological analysis. On the basis of this,the three-dimensional strata model establishing method is proposed,which is based on tetrahedral network(TEN),generalized tri-prism(GTP) and visualization toolkit( VTK) . The borehole data is used to establish the three-dimensional strata model by the method. Firstly,the triangle ir-regular network ( TIN) is generated by the borehole collar data;then,according to the spatial sequence of strata,each triangle of TIN is expanded downward to obtain GTP voxel model along the borehole,and the GTP voxel model is tetrahedron subdivi-ded by building the three-dimensional strata model;finally, three-dimensional display and spatial analysis functions such as property inquiry,distance and angle measurement and cut are realized by the three-dimensional strata visualization system de-veloped by visualization toolkit( VTK) . The experiments are conducted based on the borehole data of a mine,the results show that the GTP model based on TEN contributes to solve the problem of space entity subdivision and cutting,the application of VTK in three-dimensional stratum visualization is feasible,and the performance of VTK in visualization function and spatial a-nalysis is perfect. Therefore,it has some reference for enhancing the efficiency of mine geological analysis and mine geological modeling and visualization.