- 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 ...
Shaft timbering with cribs kept the proper distance apart by means of props.
Industry:Mining
Shafts of up to 5 ft (1.5 m) in diameter drilled through rock to a maximum depth of 1,200 ft (366 m) by means of a shot drill. The latter makes use of shot for cutting a circular groove in the rock being penetrated, from which solid cores are extracted.
Industry:Mining
Shaking screens with the plates supported in an essentially horizontal position that have been developed to obtain the advantages of low head room requirement.
Industry:Mining
Shaking table for treatment of ore sands, comprising a deck supported by a Ferraris truss moved by eccentric.
Industry:Mining
Shaking table in which ore is worked dry, air being blown upward through a porous deck so as to dilate the material.
Industry:Mining
Shaking table with two or more superposed decks, independently fed and discharged but worked by one vibrating mechanism.
Industry:Mining
Shale altered by incipient metamorphic reconstitution but not recrystallized and without the development of partings or preferred mineral orientation.
Industry:Mining
