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| Risk assessment of mine water outburst based on hierarchical clustering fuzzy comprehensive evaluation |
| An Lvning1, Chen Jifu1,2, Dong Guangming1, Li Yubing3 |
| 1. College of Coal Engineering, Shanxi Datong University, Datong 037003, China; 2. School of Architecture and Surveying Engineering, Shanxi Datong University, Datong 037003, China; 3. Tongxin Coal Mine Shanxi Co., Ltd.,Jinneng Holding Coal Industry Group,Datong 037003, China |
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Abstract The No.9 coal seam of Xinyugou Mine in Jiexiu, Shanxi Province was selected as the research object. In view of the risk of water outburst from the floor, 7 main controlling factors affecting the water outburst from the coal seam floor were used, including the elevation of the coal seam floor, the mining depth of the coal seam, the failure depth of the coal seam floor, the thickness of the aquifuge, the thickness of the effective aquifuge, the water pressure value of the floor and the water outburst coefficient,the data of which came from 15 existing boreholes. The water outburst from the floor of No.9 coal seam in Xinyugou Mine was divided into 5 areas : A, B, C, D and E by hierarchical clustering analysis and elbow rule. The improved analytic hierarchy process-AHP and the fuzzy comprehensive evaluation method of coupling coefficient of variation were used to classify the risk of water outburst in each partition. The results showed that area A and C were extremely dangerous areas, area B was a more dangerous area, and area D and E were relatively safe areas, which were basically consistent with the actual situation.
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