Water Inrush Risk Prediction Based on the Coal Seam Floor Thickness of Effective Confining

Water inrush is one of the main types of coal mine water disaster. Based on fluid-solid coupling theory and "down three zone" research results, the mining floor was divided into four zones, namely the mining damage zone, effective confining protection zone, confined water soil-fluid coupling lifting zone, and original confined water lifting zone, and established the thickness of effective confming rock strata water inrush prediction partition criterion. The criterion was used in risk prediction of partition in Danhou mine No 5 coal seam, and mining technology countermeasure was put forward. The results show that the coal floor risk prediction divided regions more accurately through thickness of effective confining method, and can guide the mine water prevention and control countermeasures.