Abstract
To solve the problem of how to evaluate coal floor multi-aquifer which is under complex hydro-geological conditions, a new approach is presented, which is AHP vulnerability index method based on GIS. In the research the main controlling factors influencing coal floor water inrush and its weight factors are taken into account. The method truly reflects the nonlinear dynamical process of coal floor inrush under the influence of many factors. Applying this method to evaluate the water inrush vulnerability of No.13091 working face No. 21coal floor aquifer in L1-3limestone and Ordovician - Cambrian limestone in Pingyu 1st coal mine, the results have showed that this method is more effective comparing with other traditional water inrush coefficient methods. The problem of indicating coal floor water inrush under complex hydro-geological conditions has been solved by using this method.
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