In the Kaiping Coal field,mining of five coal seams,located within 80 m in the Kailuan Group,#5,#7,#8,#9 and#12 coal seam,is difficult due to small interburden
Longwall mining has existed in Utah for more than half a century.Much of this mining occurred at depths of cover that significantly exceed those encountered by
The Subtropolis Mine is a room-and-pillar mine extracting the Vanport limestone near Petersburg,Ohio,U.S.In February of 2018,mine management began implementing
Two miners were fatally injured when a pillar bump occurred during retreat mining in a southern West Virginia coal mine.The mine was operating in the Eagle seam
A series of gas inrush events occurred during development at Grosvenor Mine resulting in exposure to elevated levels of methane at the production face.A total o
Underground mine designs typically try to avoid extraction beneath streams and rivers of any significant size,especially when the overburden rock thickness betw