noun
: a violent expulsion of rock from the walls of a mine opening caused by heavy pressure on brittle rocks in deep mines where mining has deprived the rock of support on one side — compare bump
noun
: a violent expulsion of rock from the walls of a mine opening caused by heavy pressure on brittle rocks in deep mines where mining has deprived the rock of support on one side — compare bump
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012