Assessment of water inrush and factor sensitivity analysis in an amalgamated coal mine in China |
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| Authors: | Weisheng Du Yaodong Jiang Zhenqian Ma Zhenhua Jiao |
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| Institution: | 1.School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing,China;2.School of Engineering,The University of British Columbia,Kelowna,Canada;3.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Beijing,China;4.School of Mining,Guizhou University,Guiyang,China;5.Anhui Province Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine,Anhui University of Science and Technology,Huainan,China |
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| Abstract: | Hydrogeological data are generally incomplete and inaccurate in amalgamated coal mines in China, which results in inaccuracy in water inrush forecasts. To enhance the precision of the prediction of water inrush from coal floor in an amalgamated coal mine, the vulnerability index method was developed using an analytic hierarchy process (AHP) to analyze the water inrush hazard. Six factors related to water inrush were selected and the corresponding single factor thematic map was established through geographic information system (GIS). The AHP model was built to calculate the weight of each factor. The final forecast map based on vulnerability index was acquired by superposing the six thematic maps. The forecast map was consistent with the real water inrush position. The sensitivity of the six factors was analyzed and the water-resisting layer played a significant role in controlling water inrush. Several suggestions about water inrush prevention were put forward based on the prediction results. |
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