Counterattack crusher productivity is an important performance indexes of crusher. There are many factors that affect the productivity: the mechanical and physical properties of rocks and structural parameters of the crusher two aspects. The influence of the physical and mechanical properties of the rock: This is determined by the stone source and the needs of…

Mining is one of the oldest activities of man. It is the se- load the blasted rock and transport it to special, steeply lective extraction of ore from the Earth’s surface. Man’s  inclined ore paths. The ore is then loaded into special mining activities began at the start of the Stone Age  buckets and hoisted…