Hydrogeology feature and control ways in Meitanba coal mine

The Meitanba coal mine is well known due to its large underground waer in mine throughont our country.Recently,mine water main stay recharge from underground water runoff zone;mine inflow were so long term and not decline that main stay enlarge the area and deep of water cone.Subject of controlling and proventing mine wa-ter is decreasing mine inflow,may cutoff underground water runoff zone with grouting curtain,at same time,plug stone and soil into surface subsidence and control large water blast with gate valve,and clog small water buraling with cement concrete.