An access passage through rock, used for transportation and usually following a length or zone of mineralization
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Category: <span>D</span>
An underground opening at the bottom of a stope where broken ore is collected
To recover heavy minerals from depth, with a device that employs a vacuum to first collect material and a further device or series of devices, to classify and concentrate minerals of greatest density
The flow of water as influenced by gravity
A mineral concentration device that uses a catching net, or bucket tied to a long rope, to collect heavy minerals in moving current. Used for recovering placer minerals in creeks and rivers and usually for testing purposes