- Industry: 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 short staple shaft driven from a lower to a higher coal seam and used for the gravity transfer of coal to the haulage road in the lower seam.
Industry:Mining
A short steel plug provided with a pin thread by means of which it may be coupled to the upper end of a stand of drill rods. Its diameter is greater than that of the drill rod to which it is attached, and hence it provides a shoulder that can be grasped by an elevator. When each stand of rod is provided with an elevator plug and an elevator is used in lieu of a rod-hoisting plug, the handling of rods is facilitated and a round trip can be made in less time.
Industry:Mining
A short steel plug provided with a pin thread by means of which it may be coupled to the upper end of a stand of drill rods. Its diameter is greater than that of the drill rod to which it is attached, and hence it provides a shoulder that can be grasped by an elevator. When each stand of rod is provided with an elevator plug and an elevator is used in lieu of a rod-hoisting plug, the handling of rods is facilitated and a round trip can be made in less time.
Industry:Mining
A short timber prop for supporting coal in holing or undercutting; a sprag.
Industry:Mining
A short tubelike device designed to be forced, without rotation, into soft rock or rock material, such as clay, sand, or gravel, by hydraulic pressure or the piledriver action of a drive hammer to procure samples of material in as nearly an undisturbed state as possible. Compare: piston sampler
Industry:Mining
A short tunnel driven between two or more veins where they are nearly vertical.
Industry:Mining
A short tunnel or chamber attached to a rescue station in which rescue workers may receive training in an atmosphere of dense smoke. It is also used to give rescue workers experience in stretcher drill, the use of stretchers, reviving apparatus, tube-breathing apparatus, artificial respiration, etc.
Industry:Mining
A short wooden plug fixed in the roof, to which lines are hung, or to serve as a bench mark for surveys.
Industry:Mining
A short, adjustable-angle trough that permits turning the conveyor panline any amount up to 30 degrees , either to the right or to the left. The position of the swivel is controlled by a roof jack and a pendulum.
Industry:Mining
A short, cylindrical grinding mill with a large diameter, used dry, with coarse lumps of ore, pebbles, or steel balls as crushing bodies. The mill load is flushed with an air stream to remove finish mesh material.
Industry:Mining
