- 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 machine consisting of a roller or set of rollers for grinding lime or gypsum to powder.
Industry:Mining
A machine consisting of two heavy rolls between which ore, coal, or other mineral is crushed. Sometimes the rolls are toothed or ribbed, but for ore their surface is generally smooth.
Industry:Mining
A machine consisting of: (1) a bottomless scraper bucket; (2) a two-drum hoist; (3) two long cables that attach to the front and rear of the scraper; (4) a movable tail block; (5) a short, guyed mast located behind a ground hopper or other delivery point; and (6) two sheave blocks mounted on the mast to guide the operating cables to the hoist. The tail block is shifted manually from time to time, swinging the scraper in a wide arc until all the material within the operating radius has been taken out.
Industry:Mining
A machine constructed to pulverize or crush stone and other hard and brittle materials; a stone crusher.
Industry:Mining
A machine cut in the midsection of a coal seam; sometimes adopted in thick seams (over 4 ft or 1.2 m) with a layer of dirt or inferior coal in the middle. A middle cut would be made with a turret coal cutter.
Industry:Mining
A machine cut in the midsection of a coal seam; sometimes adopted in thick seams (over 4 ft or 1.2 m) with a layer of dirt or inferior coal in the middle. A middle cut would be made with a turret coal cutter.
Industry:Mining
A machine cut made in the roof immediately above the seam. A roof cut is sometimes made in a soft band of dirt over the coal, which gives increased height in thin seams. The cut is made with a turret coal cutter.
Industry:Mining
A machine designed to use the fusion-piercing mode of producing holes in rock. Sometimes incorrectly called a jet drill.
Industry:Mining
A machine designed to use the fusion-piercing mode of producing holes in rock. Sometimes incorrectly called a jet drill.
Industry:Mining
