True three-dimensional modeling method for complicated faults

Abstract

The invention belongs to the field of geological mapping, in particular relating to a true three-dimensional modeling method for complicated faults, which is characterized in that: a complicated fault system is converted into multiple simple fault systems by using an RPBP method, and then three-dimensional modeling for the complicated fault system is realized by using the method for constructing a simple fault system model. The simple fault system refers to fault assemblages generated by the influence of independent tectonic movement at each time, and mutually-cut or mutually-staggered condition does not exist between faults; the complicated fault system refers to fault assemblages generated by the influence of multi-episodic mutually-influenced tectonic movements, and the mutually-cut and mutually-staggered and other complex conditions exist between faults. The method comprises the following basic processes: constructing ground CD-TIN, judging the type of fault and sequencing the priority of the fault modeling, generating boundary triangles, constructing a fault model and checking and interactive editing of the fault model. By the invention, the complicated fault system is converted into multiple simple fault systems, thus simplifying the difficulty of the fault modeling and ensuring the accuracy of the fault model.

Description

technical field [0001] The invention belongs to the field of geological surveying and mapping, and in particular relates to a true three-dimensional modeling method for complex faults. Background technique [0002] Scholars at home and abroad have proposed some three-dimensional fault modeling methods, such as the "plane fitting method" that uses one or more planes to fit the fault plane; it is proposed to construct the fault plane and the ground plane TIN surface separately, and then process the two The "local method" at the intersection of the TIN surfaces between them; there is also a "local method" that does not consider the fault factor first, but considers the coal layers on both sides of the fault surface as a whole to construct the TIN surface, and then constructs the intersection of the coal seam TIN surface and the fault TIN surface. The "holistic method" of the line. The disadvantages of the above three methods are: 1) the scope of application is limited, only su...

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Problems solved by technology

The disadvantages of the above three methods are: 1) the scope of application is limited, only suitable for the simulation of a single fault or a simple fault system, not applicable to the situation of multiple faults or complex fault systems (such as the mutual cutting of normal and reverse faults); 2) there is no Considering the influence of the thickness of the fault, although the fault thickness can be simplified to an irregular surface when the thickness is small, the influence on the geological structure and engineering construction is greater when the fault thickness is large, and its thickness cannot be ignored; 3) During the process of 3D fault modeling Failure to use interactive technology to control and modify intermediate results, failure to integrate other fault modeling data and corresponding expert knowledge mastered by geological personnel into the modeling workflow

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