运输大巷

main haulage drift roadway haulage roadway bucket roadway element location load of roadway roadway element failure haulage business haulage chain tractor haulage inclined haulage rail haulage haulage roadway main roadway double track haulage roadway main haulage main conveyor roadway main haulage track main haulage level main haulage road main haulage cross-cut main-and-tail haulage main haulage conveyor