METHOD OF ELIMINATING THE HAZARD OF MINING DAMAGES CAUSED BY MINED OUT VOIDS

摘要

A method of eliminating dangers in excavation caverns in mines, in particular fire and methane dangers in caverns discovered in an area where hard coal is mined, characterized in that foam is gradually introduced to the inside of the cavern (1) until it is completely filled, the foam being produced by a foam-producing machine (3) of design, and then, depending on requirements, a lagging or filling is made, while foam disappearing from the cavern (1) is continually replaced.IMAGE