The Application of Dimensionless Analysis to Evaluation of Factors Affecting Water-Inrush from Coal Floor

Dimensionless analysis was applied to correctly evaluate the order of the factors affecting water -inrush from coal floor. In the evaluation of water -inrush from coal floor, many factors need to be considered. Thus, to correctly evaluate the order of the factors affecting water -inrush from coal floor is very important, which is the key to reasonable evaluation of water -inrush from coal floor. Based on systematic collection of the hydrogeological data of Yanzhou Coal Mining Area, we analyzed the factors affecting water -inrush from coal floor and evaluated water-inrush risk of lower group of coal seams mining. We used dimensionless analysis for the standardized process of hydrogeological data. There also came a comparison of each factor affecting water -inrush from coal floor under information fusion. Then we obtained the order of factors affecting water-inrush from coal floor. The results shows that dimensionless analysis is good for evaluating many factors affecting water -inrush from coal floor. It provides the powerful foundation for evaluation of water -inrush risk from coal floor in lower group of coal seams mining.