Study Of Water-Inrush Danger Forecast Of Coal Seam Floor Based On Multi Factor's Fuzzy Clustering Approach

In view of No.10 seam's mining in the sixth section of Jiyang coal mine, this paper made a detailed analysis and study of the hydrogeological characteristics and water invasion danger of No.10 coal seam floor. By the approaches of collecting the previous geology and hydrogeology exploration data of the section, this paper analyzed the geological and hydrogeological conditions of No.10 coal seam roof and floor, made a study of the lithological characters and the combined features of No.10 coal seam floor, analyzed the direct indirect discharge aquifers and hydraulic connection among these aquifers, and drew conclusions that limestone aquifer IV&V was the main discharge aquifer that threatened NO.10 seam mining, limestone aquifer Xu&O had an effect on seam mining by recharging the aquiferⅣ&Ⅴ. This paper dealed with the head pressure's distributive characteristics of limestone aquifer IV&V and the burialdepth of No.10 coal seam; analyzed the water abundance and conductivity of the aquifers and the faults using the transient electromagnetic exploration achievements; modified the aquiclude thickness according to the pitch and lithological association from No.10 seam floor to limestone aquifer IV&V; quantized the structure indexes of the section adopting box-covering method using fractal dimension value of the faults, and rationally evaluated the complexity degree of the structure in the section. This paper made a predibtion of the water invasion danger with the method of fuzzy clustering analysis after comprehensive analyses of all the five influence factors which contained the pressure and water abundance of the aquifer,aquiclude water resistance,mining depth,geological structure, and got a conclusion of the water invasion danger's division. Aiming at setting up fault waterproof pillar for Lijia fault and its branch fault,DF3 faul,DF5 fault, this paper used the formula in the regulation,the way considering mining pressure,numerical simulating method and finally offered the rational remained dimensions.