????????????????????????????????

根据某矿区的地质钻孔资料，划分了不同层面并对地层的交叉与缺失做了处理. 利用不同 层面的高程值建立不同层面的等高线，再由Kriging插值法得到矿区的三维地层模型. 从所 建模型中抽取剖面图并与矿区实际勘探线剖面图进行比较，验证了模型的可靠性. 最后从建 立的多层DEM模型中抽取剖面数据进行有限元数值模拟，并与实际勘探和采掘过程中揭露的 断层位置比较，两者结果非常吻合，为该矿区采掘设计和构造预测提供了一定的参考.

BUILDING AND APPLICATION OF A MULTILAYER DIGITAL ELEVATION MODEL BASED ON THE BOREHOLE DATA

Multilayer digital elevation model is simple and effective in building a three-dimensional stratigraphic model. Based on the borehole data of a coal field, different geological layers are identified. The method for gathering and processing the data of the cross-layer and absent-layer is proposed. The elevation contours of the different layers are obtained with the processed elevation data. The Kriging interpolation method is used to get the data of the strata for the three-dimensional stratigraphic model of the mining area. The profile diagrams are drawn from the built three-dimensional stratigraphic model and compared with that of the same sections by manual drawing. The results show that the former model is more reliable than the latter. Finally, the numerical simulation with finite element method is carried out by drawing data from the built three-dimensional stratigraphic model. The simulating results also show that they agree fairly well with the results obtained by geological survey and those gathered in coal mining process and can be used in coal mining design and tectonic prediction.