Research on the evaluation and optimization of gangue filling scheme based on AHP-entropy weight-TOPSIS model
The underground filling of coal gangue is an environmentally friendly disposal method developed in recent years.However,there are currently no relevant standards and norms for different filling mining technologies,and a comprehensive evaluation system has not yet been established.In accordance with the Guiding Opinions on Coal Mine Filling Mining Work,and according to the construction plan for gangue filling in Xiaobaodang Coal Mine,a evaluation system for coal gangue filling based on multiple factor index was proposed.In order to make the weight distribution of evaluation indicators reasonable,a subjective and objective comprehensive weighting method combining analytic hierarchy process and entropy weight method was adopted,which reduced subjectivity while taking into account the prominent ecological and environmental problems in the northern Shaanxi region,making the results scientific and reasonable.Finally,the combined weighting results were applied to the TOPSIS model for decision analysis,and the optimal construction plan was scientifically evaluated.The ground drilling filling was ultimately considered the optimal plan,and a coal gangue filling example of 2 million tons per year was implemented for verification,resulting in the comprehensive cost value of filling coal gangue.