Mining Industry - CiteSeerXHard Rock. Hard rock mining produces ore for a variety of . Hard rock mines typically require water for drilling, and . material is crushed in a jaw crusher to inter.typical of mine rock crusher,Crushed Stone: Line, Granite, Traprock and More - GeologyIt is made by mining one of several types of rock such as line, granite, trap rock, . or sandstone; crushing the rock; and then screening the crushed rock to sizes . That is an average of about four tons of crushed stone for each citizen.
typical of mine rock crusher