A model of Fisher's discriminant analysis for evaluating water inrush risk from coal seam floor

作者：Zhang Wen Quan; Zhang Guang Peng^*; Li Wei; Hua Xiang

来源：Journal of China Coal Society, 2013, 38(10): 1831-1836.

• Coal seams
• Distance discriminant analysis
• Fisher's discriminant
• Stepwise discriminant analysis
• Water inrush

In order to accurately evaluate the water inrush risk from coal seam floor, considering the different effects of various factors, the factors without significant discriminant effect were eliminated by using stepwise discriminant analysis. Five main influencing factors including aquifer property, water head, water-resisting layer thickness, fault permeability and fractures development level were selected as discriminant indexes. Therefore, a discriminant model was developed based on the past data of water inrush. In addition, all the samples were mapped on a scatter diagram. This model which passed the significance tests shows a good classification effect. The misjudgment ratio of 15 training samples is zero and the water inrush risk of test samples are predicted accurately as well. The study shows that the discriminant model developed for evaluating water inrush risk from coal seam floor is of high reliability and practical applicability.

• 出版日期2013
• 单位山东科技大学