- 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 road built to carry heavily loaded trucks at a good speed. The grade is limited on this type of road and usually kept to less than 17% of climb in direction of load movement.
Industry:Mining
A road scraper or a grading shovel, used in leveling or grading ground.
Industry:Mining
A roadway or airway driven across pitching measures on, or nearly on, a level to reach a bed of coal or other objective, or to drain off water.
Industry:Mining
A roadway support consisting of an H-section girder of circular form and usually made in three parts. The joints are secured by fishplates and bolts. This type of steel arch is useful for withstanding pressures from roof, sides, and floor. With close lagging between the rings, the finished roadway resembles a tube.
Industry:Mining
A roadway used by miners for walking to and from the face; i.e., from the shaft bottom or main entry to the workings and back.
Industry:Mining
A roadway used by miners for walking to and from the face; i.e., from the shaft bottom or main entry to the workings and back.
Industry:Mining
A roast in which conditions in a furnace allow sulfur in feed to recombine with calcined products to form sulfates.
Industry:Mining
