The development of open-pit mines can adversely affect and even damage existing access tunnels. To ensure the safety and serviceability of them, it is essential
Due to the change of initial stress state caused by roadway excavation,the permeability of the coal body may be changed during the excavation process.In this pa
Coal burst represented a major hazard for some U.S. mining operations. This paper provides an historical review of the coal burst hazards,identifies the fundame