Abstract: Based on the assignments of supplementary hydrogeological survey after water inrush accident happened in Luotuoshan coal mine,as well as its characteristics of hydrogeology,the new technical requests and working methods for the pumping test in Luotuoshan coal mine is proposed.According to the new technical requests and working methods,the hydrodynamic conditions of karstic fissure water in Luotuoshan coal mine are analyzed.The research results not only satisfy the request of numerical calculation for the mine discharge,but also provide important value for the reevaluation of hydrogeological conditions in those coal mines that mine under the threat of Ordovician limestone water and especially in which water inrush accident happened because of collapse column.