Method of an apparatus for gaining access to an underground chamber

摘要

Method and apparatus for gaining access to an underground chamber is disclosed to utilize a pressurized pipe casing which defines a conduit for introducing compressed air to a drill, which drill is utilized to bore a rescue hole to an area of entrapped miners. Thereafter, access is gained to the area of entrapment and the drill pipe is utilized as casing defining a rescue shaft for providing ingress of rescue personnel and egress of entrapped miners.