基于AHP-熵权法耦合方法的地质构造复杂程度定量评价
Quantitative evaluation of geological structure complexity based on AHP-entropy weight coupling method
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摘要: 井田地质构造的复杂程度不仅会影响工作面的合理布置，当断层等异常地质构造具有导水性时可能引起矿井水害等地质灾害的发生。为了能够科学准确对井田构造复杂程度进行定量评价，以陕北侏罗纪煤田庙哈孤矿区沙梁井田为研究对象，在充分了解井田地质条件的基础上，结合研究区现有的钻探资料和物探资料所揭露的井田构造发育情况，最终选取断层分维值、断层强度指数、断层密度3个主控因素对沙梁井田的地质构造复杂程度进行定量评判。层次分析法（AHP）在进行权重赋权时主观性较强，在一定程度上影响研究结果的准确性，熵权法是一种客观赋权法，克服了主观性较强这一缺点。利用层次分析法与熵权法两者耦合的方法综合得出地质构造复杂程度主控因素的权重，建立了矿井构造复杂程度定量评价模型，并利用所提出的定量评价模型对研究区构造复杂程度进行了定量评价。在此基础上根据提出的定量评价模型，将沙梁井田范围内的复杂程度分为4个等级区域，包括复杂构造区、较复杂构造区、中等构造区、简单构造区，为地质构造复杂程度定量评价提供一种新的理论方法，该研究成果为地质构造复杂程度定量评价提供了一种新方法，旨在为矿井的高效安全生产提供一定的指导依据。Abstract: The complexity of the geological structure of the mine field will not only affect the reasonable layout of the working face, but also cause geological disasters such as mine water damage when the abnormal geological structures such as faults have water conductivity. In order to make a scientific and accurate quantitative evaluation of the structural complexity of the well field, the Shaliang well field in Miaohagu mining area of the Jurassic coalfield in northern Shaanxi was taken as the research object. On the basis of fully understanding the geological conditions of the mine field, combined with the development of well field structure revealed by existing drilling data and geophysical data in the study area, the three main controlling factors, fault fractal dimension value, fault strength index and fault density, were used to quantitatively evaluate the complexity of geological structure in Shaliang minefield. Analytic hierarchy process (AHP) has a strong subjectivity in weight assignment, which affects the accuracy of the research results to a certain extent. Entropy weight method is an objective weighting assignment method, which overcomes the disadvantage of strong subjectivity. Therefore, in this study, the weights of the main controlling factors of geological structure complexity were comprehensively obtained by using the coupling method of analytic hierarchy process and entropy method, and the quantitative evaluation model of mine structural complexity was established and the proposed quantitative evaluation model was used to quantitatively evaluate the structural complexity in the study area. On this basis, according to the proposed quantitative evaluation model, the complexity within the scope of Shaliang minefield is divided into four grades, including complex structural area, relatively complex structural area, medium structural area and simple structural area. It provides a new theoretical method for quantitative evaluation of geological structural complexity. The research results provide a new method for quantitative evaluation of geological structural complexity. The purpose of this paper is to provide some guidance for the efficient and safe production of the mine.
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Keywords:
- AHP /
- entropy weigh /
- Ordos Basin /
- geological structure /
- Jurassic coalfield
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