A Grey Fuzzy Comprehensive Model for Evaluation of Geological Structure Complexity |
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Authors: | Zhou Yunxia Zhou Yongzhang Xie Shuyun Cao Daiyong Qiu Xiangrong |
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Institution: | 1. School of Geographical Science and Planning, Sun Yat-Sen University, Guangzhou 510275, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China; Department of Earth and Space Science and Engineering, York University, Toronto ON M3J1P3, Canada 3. College of Resources & Safety Engineering, China University of Mining and Technolog, Beijing 100083, China 4. South China Engineering and Geophysics Technology Development Co., Guangzhou 510275, China |
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Abstract: | Several structure sets (faults and folds) are characterized by their self-similarity properties. Herein, we discuss the degrees of complexity of fractures by introducing the box-counting fractal dimension of faults as a key criterion to be used in comprehensive fuzzy analysis model for evaluation of the complexity of structures. Totally, eight criteria including density, intensity, length of faults, types and box-counting fractal dimension of faults, the intersection angle between faults and coal beds, gradient coefficients, dip angles of the coal beds, and variation coefficients of dip angles of the coal seams, were used for the evaluation purpose. The grey fuzzy comprehensive assessment model was used to rank the relative importance of these criteria. Scores indicating the complexity of structure were calculated on the base of criteria values and their weights for each sub-area of the study area in the Pansan (潘三) coal mine district in the southern Anhui (安徽) Province, China. The result on the calculated complexity of structure is useful for mining planning in the study area. |
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Keywords: | fracture structure ractal dimension uzzy comprehensive evaluation |
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