CONDITION OF WATER BURST AND DYNAMIC FORCAST OF INFLOW IN DONGHUANTUO MINE

Based on an overlapping principle of multiple geological information,this paper divides firstly roof water-filling aquifer into different water-enrichment subareas,in the light of roof water-bursting problems resulted from mining coal seam No.8 in Donghuantuo coal mine,Kailuan,China.In addition,according to analyses of lithologic features for rock bed between the coal seam No.8 and the roof aquifer,the paper re-corrects water-conduction heights calculated with special regulation which is short of consideration of the lithologic features,and draws up a roof-falling safety division map.On the basis of the water-enrichmental and the safety division map,a scientific safety evaluation system for the roof water-bursting condition during mining coal seam No.8 is established,and a division scheme for the condition is also put forward in the paper.Finally,dynamic water inflows for working faces No.2086 and No.2188B are predicted by applying Visual Modflow.