Patent ID: 8460074

Claim:
An apparatus for providing breathable air to one or more safe havens within a mine comprising: an air source located external to the mine including a movable skid, a generator, an air compressor, said air compressor being electrically connected to the generator and a primary source of power for the mine such that electrical power for the air compressor is received from the generator upon interruption of the electrical power from the primary source, and an air filter in pneumatic connection with the air compressor wherein the generator, air compressor, and the air filter are affixed to the movable skid; a conduit in pneumatic connection with the air filter, said conduit extending from said air filter into said mine and being located on a floor portion of the mine wherein said conduit comprises discrete lengths of metal tubing connected end-to-end; said conduit is generally located adjacent to a bottom portion of one or more rib walls and anchored to said floor portion using a plurality of pipe straps and rock anchor bolts; said conduit being further protected by a layer of slough from said one or more rib walls where said conduit is located adjacent to a rib wall and a layer of concrete where said conduit crosses a passage; a pipe extending from each of said one or more safe havens to the conduit, the pipe being pneumatically connected between the conduit and a flow regulator within the safe haven for controlling the flow of compressed air into the safe haven; an exhaust regulator located within each of said one or more safe havens for allowing carbon dioxide and other undesirable gases to be exhausted from the safe haven while maintaining positive pressure within the safe haven.