— No underground crusher was planned - relying only on the fragmentation profile generated by ring blasting. The specification for muck was that the fragmentation profile needed to be < 400 mm (16 in) with no overbreak - with dilution less.

® C160™ jaw crusher is the largest jaw crusher in serial production for demanding mining and quarrying applications on the ground and underground.

The purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit. The ratio of reduction through a primary crusher can be up to about 8:1. Feed: ROM up to 1.5 m; Product: -300mm (for transport) to -200mm (for SAG mill) Feed Rate: 160 to 13,000 tph

 — 1. Gyratory Crusher - Unleashing Power Upfront. When it comes to primary crushing, the gyratory crusher stands tall. This massive machine is capable of reducing large rocks into tiny pieces....

Split Rock, a hazardous munitions plant, unexpectedly exploded in 1918, brutally killing more than 50 men. Today, the Quarry is nothing but rock with an old piece of machinery left called the Crusher.

 — Jaw crushers are the most common solution in underground applications when the throughput is below 1000 tonnes per hour, depending somewhat on the scalping solutions. Above 1000 tph, primary gyratory crushers are an option.

The underground coal industry has recognized the need for better regulations and practices to prevent coal dust explosions in the United States. The catastrophe that occurred at the Upper Big Branch (UBB) Mine in 2010 exposed America to the destructive and violent nature of coal dust explosions.

 — Ever increasing mine production capacity and mechanized operations enable advanced drilling equipment to be widely adopted in underground mines. In order to achieve satisfactory blasting performance in tunnel advance, there is a critical need to optimize the blasting technique to match the large deep-hole drilling capability. In this study ...

 — The rock–explosive interaction behaviour influences the blasting outputs in terms of breakage, fragmentation and induced hazards. The blast designers can optimize the design parameters by assessment of rock–explosive interaction to achieve the desired...

 — Here's how to choose between jaw and a primary gyratory crusher. The required capacity defines the size and type of crushing equipment and also the number of parallel crushers or plants required to meet the mine's production rate.