Three-dimensional geological model precision evaluation method based on variable weight theory membership function

Abstract

The invention discloses a three-dimensional geologic model precision evaluation method based on a variable weight theory membership function, and relates to the field of open pit coal mine three-dimensional geologic model precision evaluation. Various factors influencing the precision of the three-dimensional geologic model are divided into subjective and objective classes, a factor set and a comment set of fuzzy comprehensive evaluation are determined based on an index evaluation system, a variable weight coefficient is introduced on the basis of a constant weight calculation result to determine the weight of each index, the variable weight theory is beneficial to balance the influence of different evaluation indexes, and the evaluation accuracy of the three-dimensional geologic model is improved. Then, according to comprehensive characteristics of the indexes and national specifications, grading standards of all the indexes are determined, a membership function is determined on this basis, the membership of all the index factors is calculated in a quantifiable mode and a non-quantifiable mode, finally, a fuzzy operator is adopted for operation, and comprehensive evaluation is conducted according to the maximum membership principle. According to the method, the balance of each index weight can be better reflected by using the variable weight coefficient, quantitative evaluation of qualitative factors is realized by adopting a membership function, subjective factor interference is avoided, and the accuracy of an evaluation result is improved.

Description

technical field [0001] The invention relates to the field of precision evaluation of three-dimensional geological models of open-pit coal mines, in particular to a comprehensive evaluation method for determining the precision of three-dimensional geological models using variable weight theory + membership function. Background technique [0002] With the introduction and continuous development of the concept of intelligent mines, the 3D geological model, as an important part of the intelligent construction of open-pit coal mines, is the basis and data source for the construction of intelligent management and control platforms, and it plays an important role in the design and production process. Due to the complexity of mine geological information and the difficulty of obtaining it, as well as the human interference in the modeling process and the variety of modeling methods, the uncertainty of the 3D geological model is more prominent, and it is difficult to accurately evaluat...

AI Technical Summary

Problems solved by technology

To sum up, various studies mainly focus on the analysis of factors affecting the accuracy of 3D geological models and the research on a specific uncertainty problem. There are few studies on the evaluation of 3D geological model accuracy, and the subjective influence of evaluation methods is relatively serious. , will have a certain impact on the model accuracy evaluation results

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