- 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 ...
The use of a smaller charge of powder to blow down the face of the coal after it has been undercut, as distinguished from "shooting off-the-solid".
Industry:Mining
The use of air space or a void within a blast hole between an explosive charge and inert stemming to enhance the shock wave detonation force.
Industry:Mining
The use of metal trays, instead of shovels, for hand-filling coal into trams. The collier scooped the lumpy coal into the box and discarded the small material, which had little market value. The use of a box was compulsory at many collieries until several decades ago.
Industry:Mining
The use of oxygen instead of air to convert molten pig iron into steel. The oxygen is used in different ways in different furnaces, but the fastest ones utilize the direct oxidation effects of a relatively pure (99.5%) oxygen.
Industry:Mining
The use of pressure oil or soluble oil and water for operating face machines and steel supports. The fluid is supplied by rotary pumps driven by electricity located at points near the face. Hydraulic power has an advantage in that the space required is considerably less than that for conventional drives.
Industry:Mining
The use of unconfined explosives to start the flow of coal down a breast or chute in an anthracite mine.
Industry:Mining
The use of water to remove the soluble constituents of a mill product before further treatment.
Industry:Mining
The use of well-graded sand, mixed with water, as the medium for washing coal, as in the Chance washer.
Industry:Mining
