多源地质数据综合三维建模及地质学分析——以青海木里三露天勘探区为例

3D modeling with integration of geological data of multi-sources and geological analysis:A case of Sanlutian explorationg area of Muli, Qinghai

常规的二维地质图件难以直观地表达煤炭资源的三维空间展布。基于青海木里三露天勘探区的钻孔数据、二维平面地形地质图、煤层底板等高线和地质勘探剖面图,对该地区地形、煤层底板和断层的三维空间形态及温度场进行了重构。三维重建结果清晰明确地展示了三露天勘探区煤层的形态特征、各个沉积旋回的聚煤范围和强度、构造轮廓特征以及地下地温特征等。结果表明,基于多源地质数据的三维可视化技术可直观形象地反映煤层等地质体的形态和属性特征,可有效地分析复杂断层在地质历史中产生的先后顺序及古构造应力场特征。使用三维建模技术重构地质体对沉积构造及地质体属性特征分析是一种行之有效的手段。

Generally,conventional coal exploration results are shown based on two-dimensional maps,it is very difficult to express three-dimensional spatial distribution in direct and visual way.Based on borehole data,two-dimensional topographic and geologic map,coal seam bottom contour map and geologic exploration section map,this paper reconstructs spatial distribution of ground surface,coal seam,shape of main faults and temperature field.Based on geological data of multi-source,three-dimensional geological modeling results clearly show us coal seam shape features,coal accumulating scope and intensity of each sedimentary cycle,structural outline characteristics and underground temperature field characteristics.The results show that three-dimensional visualization technology with geological data of multi-source vividly reflects the morphological characteristics of coal seam and other geological bodies,it also can effectively analyze the sequence of complex geological faults formed in the geological history and paleotectonic stress field characteristics.Therefore,it is a very effective means using three-dimensional geological modeling for the analysis of the deposition,structure and geological attribute field.