3D Ore Deposit Modeling and Application in Digital Mineral Survey
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摘要: 为弥补现有数字矿床建模技术在地质矿产勘查处理和应用中的不足，从原始勘查数据建库及标准化、多指标单工程矿体自动圈定、基于语义识别的剖面矿体的连接与外推、矿体表面和品位建模、基于剖面矿体线框模型构建矿体表面模型及基于TIN+Octree数据结构和地质统计学理论建立矿体的空间属性模型等5个方面总结提出一套面向地质矿产勘查业务处理的矿床建模流程和总体技术解决方案.提高了地质矿产勘查研究精度，为进一步的矿山开采提供可靠的数据模型.Abstract: To make up the deficiencies of existing digital ore deposit modeling methods and its applications in mineral survey data managements, a method is advanced for ore deposit modeling in geological mineral survey data management. The method is featured with the following improvement: (1) Original mineral survey data standard informationization; (2) Automatic engineering orebody delineation by multi-confine and comlpex industry index; (3) Orebody joint and extrapolate mode in profile map based on semantic identification; (4) Orebody surface modeling by orebody wireframe model contours in profile map; (5) Orebody spatial attribute modeling by TIN+Octree data structure and geostatistics, and its applications in mineral reserve estimation. So that it can enhance research precision on geological mineral survey and provide the credible orebody model for mining design.
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图 2 08号钻孔67号~101号取样段圈定结果
Fig. 2. Partial ore delineation segments of drill 08, which sample number from 67 to 101
图 3 两两钻孔之间相同煤层编号煤层的自动连接
Fig. 3. Coal seam automatically contours based on same coal code between two adjacent drills
图 6 基于矿体表面模型的品位模型
a.矿体表面模型；b.矿体块体模型
Fig. 6. Orebody block model confined by orebody surface model
表 1 某铁矿区矿体圈定工业指标
Table 1. Ore delineation industrial index for one iron ore deposit
矿石类型 类型判定条件 工业品位 边界品位 可采厚度(m) 夹石剔除厚度(m) 磁铁矿 mFe/Tfe≥15% (TFe)≥20% (TFe)≥18% ≥5 5 赤铁矿 mFe/Tfe＜15% (TFe)≥30% (TFe)≥20% ≥5 5 黄铁矿 － TS≥13 TS≥8 ≥4 4 注：样品中S含量大于8%时，根据硫化铁中S和Fe的比例0.875，扣除全Fe中硫化铁所带的Fe含量. 
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表 2 某铁矿区矿体圈定表达式
Table 2. Ore delineation expression for one iron ore deposit
矿体名称 圈定表达式 工业磁铁矿 (mFe/TFe≥0.15)&&(TS＜8 && TFe≥20)‖(TS≥8 &&(TFe-0.875×S)≥20) 工业赤铁矿 (mFe/TFe＜0.15)&&(TS＜8 && TFe≥30)‖(TS≥8 &&(TFe-0.875×S)≥30) 工业黄铁矿 TS≥13 低品位磁铁矿 (mFe/TFe≥0.15) &&(TS＜8 && TFe≥15)‖(TS≥8 &&(TFe-0.875×S)≥15) 低品位赤铁矿 (mFe/Tfe＜0.15) &&(TS＜8 && TFe≥20)‖(TS≥8 &&(TFe-0.875×S)≥20) 低品位黄铁矿 TS≥8
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表 3 08号钻孔67号~101号取样段加权平均品位
Table 3. Sample grade weighted average of drill 08 as sample number from 67 to 101
矿体 样号 样品品位(%) 样长(m) 真厚(m) 矿段品位(%) TFe mFe FeO TS TS NTFe Py3 69 11.10 0.20 0.00 8.11 1.77 6.83 8.22 3.98 70 13.24 0.55 0.00 10.02 1.66 71 7.56 0.20 0.00 6.42 1.68 72 5.94 0.30 0.00 8.36 1.72 FeH3 73 20.10 0.40 12.35 0.45 1.66 6.75 1.61 21.22 74 19.68 0.30 11.06 1.09 1.68 75 21.40 0.42 13.51 2.46 1.68 76 23.60 0.60 11.76 2.39 1.73 FeM2 77 21.80 4.80 12.99 1.12 1.97 9.66 2.01 25.66 78 23.80 15.40 11.58 2.21 1.99 79 31.50 24.00 13.79 1.37 2.00 80 27.40 20.10 11.96 2.57 1.87 81 23.70 14.88 11.50 2.87 1.83 FeM3 82 17.50 5.90 9.06 5.12 1.87 7.38 4.77 15.51 83 19.44 8.00 9.39 0.55 1.76 84 15.40 0.70 9.67 3.58 1.95 85 18.32 1.10 9.62 9.84 1.80 FeM2 86 23.80 19.40 16.94 1.44 1.74 11.49 1.91 26.58 87 27.80 23.40 11.76 0.61 2.00 88 24.00 19.30 9.06 2.18 2.00 89 27.40 22.60 9.26 1.86 2.00 90 28.80 23.00 9.52 2.57 1.75 91 27.60 22.30 11.06 2.84 2.00 FeM3 92 17.20 8.00 5.48 6.92 1.86 5.78 6.21 15.95 93 15.10 8.60 5.35 3.81 2.00 94 22.64 10.30 8.29 8.01 1.92 夹石 95 18.60 4.00 0.00 10.08 1.76 96 20.80 5.50 0.00 10.92 1.76 97 7.36 2.00 0.00 2.59 1.76 FeM3 98 17.76 10.70 4.68 1.72 1.76 1.76 1.72 17.76 FeM2 99 20.80 12.30 6.00 2.98 1.76 5.28 1.34 22.20 100 25.00 20.50 6.00 0.66 1.76 101 20.80 16.90 4.07 0.37 1.76 注：NTFe表示扣除TFe中硫化铁所含的Fe含量之后的可利用的净铁含量.
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