SOFT ROCK LEAKING ACTION & MINE PRESSURE CONTROL

The aiknewledgement of the wall rock ation law in soft rock underground project paves the way for soft rock control.Longkou is Chian's typical soft rock mining are The pressure and expression law of its mining pits and lanes turns out to be quite different from that of medium hard rock.The theory of soft vock leaking action not only can be used for unsteady rock support and protection in mines,but also has a speciol magnificance on wall rock in mining pits,especially on the basical principle of top coal excavation and its control.