Abstract: Aiming at the water inrush accident of the floor which seriously threatens the mine safety production,the influence of faults on the water inrush from the coal floor is studied through analysis.Based on the actual geological structure and fault characteristics of No.11 coal seam of Jiexiu Zhengyi Coal Industry Co.,Ltd.of Shanxi Coking Coal Group,this paper studies the influence of the geological structure of No.11 coal seam to be exploited on the floor water inrush,first analyzes the impact type of No.11 coal seam fault structure.Then calculate the width of the fault-proof water-proof coal pillar and analyze the influence of the hidden collapse column.Finally,the Dajing method was used to predict the water inrush of No.11 coal seam,and the risk of water inrush in No.11 coal seam was evaluated.

Key words: Geology, Fault, Floor Water Inrush, Water inrush prediction