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United States Bureau of Mines
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 small cone, made in the laboratory of a mixture of clay and salt, that softens at a definite, known temperature. It is used in the manufacture of refractories. It has also been used in volcanology to determine the approximate temperature of a molten lava.
Industry:Mining
A small crosscut through barren ground to connect two orebodies.
Industry:Mining
A small cylinder whose piston is moved by a piston rod controlled by a larger cylinder.
Industry:Mining
A small depression dug in the earth in which a wheel of a truck-mounted drill rig is set to prevent the drill from moving.
Industry:Mining
A small device for registering photographically the passage of flame. This must not be confused with the photographing of the flame on the manometer record.
Industry:Mining
A small diamond- or other-type rock drill mounted on a bar and used in an underground workplace.
Industry:Mining
A small diamond- or other-type rock drill mounted on a bar and used in an underground workplace.
Industry:Mining
A small dike. There is no agreement on specific size distinctions.
Industry:Mining
A small drain valve.
Industry:Mining
A small drift driven in for prospecting purposes, or a cross-cut driven to an airway above the gangway.
Industry:Mining
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