- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 ...
In this system, a single duct is provided and is normally operated by a blowing fan. After blasting, airflow is reversed and the fumes and dust are exhausted. Ventilation is again reversed to blowing, when the work at the face is resumed. The usual arrangement is to use two fans, one for forcing, one for exhausting, at the mouth of the heading. This arrangement is particularly suited to underground use as it allows clean air to be drawn from, and contaminated air to be discharged to, separate points in the main airways.
Industry:Mining
In geology, the central line of a syncline, toward which the beds dip from both sides.
Industry:Mining
Mechanically separated sand or the sand portion of mill tails used as backfill in underground openings. Usually conveyed hydraulically. Also spelled classified sandfill.
Industry:Mining
In surveying, a sight along the reverse direction of a line; the reciprocal of a given bearing.
Industry:Mining
Chamber in which exit gases from roasting, smelting, melting, or calcining are filtered through membranes (bags) that arrest solids such as fine particulates.
Industry:Mining
N. of Eng. A cavity in a coal seam filled with combustible gases under a high pressure, which, when cut into, are given off with much force.
Industry:Mining
Horizontally mounted cylindrical mill, charged with flints or selected lumps of ore or rock. Usually long and high discharge.
Industry:Mining
