精选优质文档-倾情为你奉上UNDERGROUND MINING METHODS Summary：The first section gives an overview of underground mining methods and practices as used commonly in underground mines, including classification of underground mining methods and brief explanations of the techniques of room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, block caving.Keywords: Mining method, underground mining, room-and-pillar mining, support,1 Underground Mining Methods1.1 Cl
