- 업종: 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 employed to reduce the number of fuses to be lit by the miner before retiring to safety. By means of a multifuse igniter, it is possible to remotely fire stopes or headings primed with plain detonators and safety fuse.
Industry:Mining
A device erected at strategic points in mine roadways for the purpose of arresting explosions. Consists essentially of trays loaded with stone dust, which are upset or overturned by the pressure wave in front of an explosion ahead of the flame, producing a dense curtain or cloud of inert dust to blanket the flame and stop further propagation of the explosion.
Industry:Mining
A device fitted in hydraulic power systems underground so that temperatures cannot rise above about 85 degrees C. It is a safeguard against fire risk due to a rapid rise in temperature if the fluid circuit is interrupted by wrong manipulation of valves, etc.
Industry:Mining
A device fitted to a belt conveyor that automatically takes up any slack or stretch in the belting. A gravity takeup device is sometimes fitted immediately behind the driving unit, thus eliminating slack that would otherwise occur. The main disadvantage of gravity takeup is that it gives the belt three entire bends.
Industry:Mining
A device fitted to a belt conveyor to give an alarm or to cause the conveyor to stop in the event of a defect, such as belt slip, breakage, tearing, misalignment, or overload.
Industry:Mining
A device for applying hand power to lift an object by means of a screw or lever, or by hydraulic power.
Industry:Mining
A device for assessing the wear resistance of surfaces. The specimen to be tested is rubbed alternately by the flat faces of two weighted abrasive wheels that revolve in opposite directions through frictional contact with the specimen and exert a combined abrasive, compressive, and twisting action twice in each revolution of the specimen holder.
Industry:Mining
