Beam Stage Loader and Crusher | Introduction | underground COALThe BSL has a change of elevation (a vertical curve) along its length in order to discharge coal onto the maingate conveyor and. in almost all cases, a crusher or.underground coal crusher,Crushers and Equipment Technology in Mining | Crushers .Primary Crushers; Jaw Crusher; Gyratory Crusher; Secondary and Tertiary Crushers; Cone . primary stage is performed at the mine site (surface or underground). . Coal plants will use roll crushers, either single roll or double roll, as primary.
underground coal crusher