- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A shaft used wholly or mainly for ventilating mines, for bringing fresh air to places where miners are working, or for exhausting used air. It may be used as an intake (downcast) shaft or a return (upcast) shaft.
Industry:Mining
A shaft whose direction of rotation can be reversed by the use of clutches or brakes.
Industry:Mining
A shaft-sinking method sometimes used through soft ground down to bedrock. It is similar to caisson sinking, except that reinforced concrete rings are used and an airtight working chamber is not adopted.
Industry:Mining
A shaker conveyor pan or trough that has been widened for one-half of its length to provide a greater loading surface when used at the face.
Industry:Mining
A shaker conveyor trough of standard length to which special lugs or plates have been attached to provide a means of connecting the trough to the driving arms of the conveyor drive unit. All motion of the conveyor is transmitted through the connecting trough. The term drive trough is frequently used for this special type of trough.
Industry:Mining
A shaker conveyor trough of two sections, one nested in the other, used near the face for advancing the trough line without the necessity of adding either a standard or a short length of pan after each cut. C-clamps hold the two sections together in any desired length.
Industry:Mining
A shaking table used when water is scarce to effect gravity concentration of sands. Air is blown upward through a porous deck, over which a layer of finely crushed ore passes. The heavy and light minerals stratify and gravitate to separate discharge zones.
Industry:Mining
A shaking table used when water is scarce to effect gravity concentration of sands. Air is blown upward through a porous deck, over which a layer of finely crushed ore passes. The heavy and light minerals stratify and gravitate to separate discharge zones.
Industry:Mining
A shaking table with a grooved deck instead of nailed-on riffles. Used in gravity concentration of sands.
Industry:Mining
