Implicit 3D Integrated Modeling of Complex Geological Structures in Mining Areas

doi:10.12068/j.issn.1005-3026.2024.09.013

Abstract

Abstract:

The implicit modeling method offers the advantage of automating the modeling process and has been successfully applied to automatic modeling of shallow geological formations. However， the automatic integrated modeling remains challenging for mine areas with multiple deep and complex geological formations such as intrusive rocks， faults and goaf. Based on the HRBF implicit modeling method， this paper proposes the implicit modeling feature vector extraction method for the coal seam， intrusive rocks， goaf， faults and other structures in the mining area， and designs the implicit integration method between the structural model and the strata model， enabling the topology?consistent integrated modeling of complex geological formations in the coal mine area. A case study of Jinan Subway Line 8 shows that this method can realize the implicit modeling of intrusive rocks， gobs and faults， which provides auxiliary support for decision?making and ensures safety in the construction of urban rail transit projects.

Key words: 3D geological modeling, goaf modeling, fault modeling, implicit modeling, radial basis implicit function

CLC Number:

TU 195

Zhi-bin LIU, Jian-qiao ZHANG, Xiao-feng DU, Jia-teng GUO. Implicit 3D Integrated Modeling of Complex Geological Structures in Mining Areas[J]. Journal of Northeastern University(Natural Science), 2024, 45(9): 1317-1325.

Figures/Tables 13

Fig.1 Performance of intrusive rocks in drill holes and numbered schematic diagrams

Fig.2 Goaf data

Fig.3 Extraction of feature points at the upper interface and lower interface of the goaf

Fig.4 Fault surface results based on HRBF

Fig.5 Principle of calculating fault misalignment implicit points

Fig.6 Automatic implicit modeling process for complex regions

Fig.7 Coal mine distribution map in the study area

Fig.8 Modeling data

Fig.9 Model result and profile along the borehole

Fig.10 Results of intrusive rock，goaf and fault model

Fig.11 Subway line profile

Fig.12 Modeling results when fault boreholes intersect

Fig.13 Principles of borehole-based model quality evaluation

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