72 / 2023-12-29 15:56:24

Research on Water Inrush Risk Assessment of Coal Seam Floor Based on AHP-EWM-CRITIC Method

Comprehensive Weight,AHP-EWM-CRITIC,Water Inrush Assessment,Risk Index

1、资源开发与利用 > 9、矿井水灾害防控与资源化利用

Abstract: Ordovician limestone aquifer is the main water-filled aquifer of coal mining in North China type coalfield. With the increasing depth of coal mining, the geological structure situation becomes more complicated. The exploration of the stability of the floor aquifuge and the evaluation of water inrush risk of the coal seam floor have gradually become one of the key links in mine water prevention and control work. This paper takes Dongjiahe coal mine as the study area, and based on the hydrogeological data and drilling data of the mine. The model adopts six evaluation factors: fault control index, coal mining depth, hydrostatic pressure, coal seam thickness, aquiclude thickness, and the lithological combination index. The comprehensive weight of the six factors is obtained through analytic hierarchy process (AHP), entropy weight method (EWM) and CRITIC method to establish an AHP-EWM-CRITIC risk index model (AEC), this model is used to evaluate the dongjiahe coal mine in West China, and the water inrush risk zonation of the study area is determined. Finally, the calculation results of AEC-model are compared with the traditional water inrush coefficient method, the results show that the AEC risk index model are significantly improved compared with the water inrush coefficient method. This method not only follows the actual observation results, but also fully considers the relative importance of water inrush evaluation index. The results can provide a theoretical basis support for the safe mining in the coal mine.



Keywords: Comprehensive Weight; AHP-EWM-CRITIC; Water Inrush Assessment; Risk Index