Water stopping device and water stopping method for mining deep development drill

The invention provides a water stopping device for a mining deep development drill and a water stopping method of the water stopping device, and relates to the field of mining development drills. The mining deep development drill water stopping device comprises a drill bit driving block, a driving motor is arranged in the drill bit driving block, a drill bit rotating rod is fixedly connected to the upper end of the driving motor, and a drill bit plugging mechanism is arranged on the outer side of the upper end of the drill bit rotating rod; the drill bit plugging mechanism comprises a drill bit body, a limiting rotating plate, a rubber air bag, an inflation pipe and a water guide grouting pipe. The drill bit plugging mechanism further comprises a drill bit body, a limiting rotating plate, a rubber air bag, an inflation pipe and a water guide grouting pipe. Before grouting of a grouting pipe is carried out in an existing mining deep development drill water stop device, a gushing channel needs to be drilled in