Study on criterion method of water inrush from Ordovician Limestone water in underground mine

In order to effectively predict the Ordovician Limestone water inrush occurred in the underground mine, based on the study on the MTI Ordovician Limest one water monitoring and prediction method, a distinguishing method of the Ordovician Limestone water inrush danger area in the underground mine was provided. The method with the finite element method was applied to establish a seepage model of the seam floor aquifers in the mining area and the surrounding region and a numeri cal simulation calculation was conducted. The calculation results were applied to the prediction of the mine water inrush in Liyazhuang Mine of Huozhou Coal and Electr ic Power Group. The results showed that based on the distinguishing index average value of the all node water inrush danger was 10%, 20% and 30% as the limit, the C alculation region was divided in to different grade water inrush danger region. The prediction method suitable to the mining area with different hydrogeologic condition C ould be applied to predict the mine Ordovician Limestone water inrush.