- 産業: 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 device to effect a secure attachment of tub to the haulage top, chiefly with endless rope haulage. The usual type attains the grip on the rope by two jaws that may be tightened by either a screw or a lever movement. The connection of the clip to the tub is usually made to the drawbar by a hook or link. The clip must maintain a sure grip on the rope and be capable of easy and quick manipulation.
Industry:Mining
A device to elevate cars on an inclined track as received from a kickback.
Industry:Mining
A device to estimate the quantity of water that flows during a given time over a weir of a given width at different heights of water.
Industry:Mining
A device to give better support in underground mining operations. It can be anchored more firmly than conventional bolts because the principle of explosive forming enables the anchor to grip the sides of the borehole along its entire length, if necessary. The key to the design is a seamless steel anchoring tube, welded to the threaded end of the bolt. Exploding a small charge inside the tube makes it expand to fit tightly in the borehole. Water, wax, or a similar buffer surrounds the charge to distribute the force of the explosion evenly and prevent it from rupturing the tube. Its use may permit mining of mineral deposits formerly considered uneconomic because of the hazards encountered in loose rock formations.
Industry:Mining
A device to introduce chilled-steel shot, at a uniform rate and in the proper quantities, into the circulating fluid flowing downward through the rods or pipe connected to the core barrel and bit of a shot drill.
Industry:Mining
A device to measure the electrical conductivity of seawater at various depths from a moving ship.
Industry:Mining
A device to monitor the moisture in coal passing through a preparation plant, by using radiation that is sensitive to hydrogen atoms. The coal is bombarded with neutrons, some of which strike hydrogen atoms and bounce back to a detector tube, thus providing a continuous measure of moisture content. This meter permits the moisture content of coal to be measured instantaneously, continuously, and automatically.
Industry:Mining
A device to provide resistance in an electric circuit, usually to limit the current, dissipate energy, or provide heat.
Industry:Mining
A device to withdraw broken rods from a borehole. It is lowered down the hole and the screw is turned around until it grips the broken rod below the joint.
Industry:Mining
A device used either on the surface or in drill holes to detect and/or indicate the occurrence or the nearby presence of radioactive minerals.
Industry:Mining
