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  • CN 62-1112/TF 
  • ISSN 1005-2518 
  • 创刊于1988年
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基于钻孔数据的地质体隐式建模约束规则自动构造方法

  • 王博 ,
  • 贺康 ,
  • 钟德云
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  • 中南大学资源与安全工程学院,湖南 长沙 410083
王博(1995-),男,河南漯河人,硕士研究生,从事数字矿山和三维地质建模等方面的研究工作。wangbo_lingli@163.com

收稿日期: 2020-10-24

  修回日期: 2021-01-11

  网络出版日期: 2021-07-14

基金资助

国家重点研发计划项目“基于大数据的金属矿开采装备智能管控技术研发与示范”(2019YFC0605304);湖南省重点研发计划项目“地下隐患和灾害检测监测技术和系统”(2018SK2051)

Automatic Construction Method of Constraint Rules for Implicit Modeling of Geological Bodies Based on Borehole Data

  • Bo WANG ,
  • Kang HE ,
  • Deyun ZHONG
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  • School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China

Received date: 2020-10-24

  Revised date: 2021-01-11

  Online published: 2021-07-14

摘要

针对隐式建模约束规则构造自动化程度较低的问题,提出了一种基于钻孔数据进行地层特征参数自动提取与量化的方法。首先通过分析原始钻孔数据自动提取地层产状来表征地层的全局插值趋势;然后利用局部椭球体搜索邻域钻孔群来构造局部插值趋势,按照不同的搜索策略提取邻域边界点集;最后将构造的约束数据应用于基于径向基和克里金的2种隐式建模插值方法。试验结果表明:该方法兼顾了钻孔数据的异向性,能够很好地模拟沉积层和侵入体,且模型准确性好,符合地质学家的认知规律。

本文引用格式

王博 , 贺康 , 钟德云 . 基于钻孔数据的地质体隐式建模约束规则自动构造方法[J]. 黄金科学技术, 2021 , 29(3) : 345 -354 . DOI: 10.11872/j.issn.1005-2518.2021.03.189

Abstract

Three-dimensional geological modeling can be divided into traditional wireframe modeling and implicit modeling.Compared with traditional wireframe modeling,implicit modeling method does not require a large number of human-computer interactions,and has the advantages of high model quality,repeatable process and fast local dynamic update speed.After years of research,various interpolation methods for implicit modeling have been developed,but the constraint data required for implicit modeling interpolation requires a lot of preprocessing,for a wide range of geological modeling work,manual processing of interpolation constraint data requires a lot of time and energy for geologists,and the operation of geological modeling based on manual processing is semi-automatic implicit modeling.In order to improve the automation degree of geologic body implicit modeling method,we proposed a method of automatic extraction and quantification of formation characteristic parameters based on borehole data,which can take into account the global occurrence characteristics of stratum and the local occurrence trend of borehole,and be used to construct interpolation constraints that control the geometry of different geological interfaces.This method analyzes the original geological drilling data,automatically extracts the occurrence of the formation to characterize the global interpolation trend of the formation,and then uses the local ellipsoid search to construct the neighborhood drilling group,extracts the field boundary point set according to different search strategies,and finally calculates the local occurrence parameters to construct local interpolation trends.Based on the above ideas,combined with the implicit modeling method of geological bodies considering the constraints of stratigraphic sequence,a complete geological body model that conforms to stratigraphic characteristics and satisfies the laws of stratigraphic sequence was constructed.The data extracted by this method were used to construct a single geological model of a uranium deposit in Xinjiang using the potential field method and the HRBF method,after that,a comprehensive model of complex shapes was constructed with full consideration of the constraints of geological rules.Comparison of the geometric form of a single model built by the two interpolation methods and the comparison of the exploration line profile of the overall model,the research results show that the new method takes into account the geological rules and constraints,can simulate sedimentary strata and intrusions strata well,and the model has good accuracy and conforms to the cognitive rules of geologists.

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