THE METHOD OF DEWATERING DURING PRELIMINARY MINING FOR CONTROLLING WATER BURSTING FROM ROOF AQUIFER

The water bursting from preliminary face of new constructed mine is the first large scale water bursting since production.The controlling techniques was limited to hole dewatering,and its effect was not fine.The author combinedtheory of three zones with practice,presented that the flooding foof aquifers include all aquifers above coal seam and below separation layer.The controlling techniques using the method of dewatering was first developed by the author and very successful in Gaozhang Mine of Zaozhuang Mining Corporation,Shandong.