Abstract： In order to evaluate the influence of the Ordovician karst water on the coal seam in the Majialiang mine field, combined with the water filling conditions and water filling channels of the water-filled aquifer, based on the analysis of the geological and hydrogeological conditions of the mine, the characteristics of the aquiclude in the coal seam floor were analyzed, and the depth of the floor disturbance failure, the thickness of the effective aquiclude and the possible water-conducting channel were introduced. Three different methods, such as the elevation comparison method, the water inrush coefficient method and the Si 's formula method, were used to evaluate the risk of water inrush in the mining of the main coal seam under pressure. The safety of the mining of the coal seam floor under pressure was comprehensively evaluated, and the coal seam was reasonably divided, and the method of identifying the Ordovician limestone water inrush was proposed. Provide technical guidance for mine water prevention and control work to ensure mine safety production.
