Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

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Mineral mining

penetrating pulley

Mining; General mining

A pulley around which a wire cable runs in cutting marble. Its thickness is less than the diameter of the wire and consequently, it can follow the wire as the latter cuts into the stone.

bucket sheave

Mining; General mining

A pulley attached to a shovel bucket, through which the hoist or drag cable is reeved.

crown block

Mining; General mining

A pulley, set of pulleys, or sheaves at the top of a drill derrick on and over which the hoist and/or other lines run.

crown pulley

Mining; General mining

A pulley, set of pulleys, or sheaves at the top of a drill derrick on and over which the hoist and/or other lines run.

crown wheel

Mining; General mining

A pulley, set of pulleys, or sheaves at the top of a drill derrick on and over which the hoist and/or other lines run.

A pulsation attributable to the bubble produced by a seismic charge fired in deep water. The bubble pulsates several times with a period proportional to the cube root of the charge, each oscillation ...