Establishment and Application of Bed-Separation Water Inrush Coefficient Method Considering Water Resistance of Fractured Rock Mass

Figure 6

Changes of Cretaceous water level during the formation of a Cretaceous BWI in Cuimu coal mine. ①: natural recovery period of water level; ②: filling period of water in Cretaceous aquifer into bed separation; ③: bed-separation water inrush period; ④: water level recovery period after water inrush channel closure.