- Industry: 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 ...
Fire-resisting paper bag, about 8 in (20.3 cm) long, filled with dry sand for stemming shotholes in coal or hard headings. See: water-ampul stemming
Industry:Mining
Firing electrically with delay blasting caps in a number of holes at one time.
Industry:Mining
Five compounds have been reported: Mo<sub>2</sub>B , melting point, 2,120 degrees C, and sp gr, 9.3; Mo<sub>3</sub>B<sub>2</sub>, dissociates at 2,250 degrees C; MoB, exists in two crystalline forms: alpha MoB, melting point, 2,350 degrees C, sp gr, 8.8; and beta MoB, melting point, 2,180 degrees C, sp gr, 8.4; Mo<sub>2</sub>B<sub>5</sub>, dissociates at approx. 1,600 degrees C, sp gr, 7.5; and MoB<sub>2</sub>, melting point, 2,100 degrees C, sp gr, 7.8, and thermal expansion, 7.7 x 10<sub>-6</sub>.
Industry:Mining
Flat screen or trommel on which passing ore is exposed to sprays or jets of water to remove as undersize any adherent mud or other fine material.
Industry:Mining
Flat stope advanced (overhand if deposit is inclined) in slanted steps, each flat forming a separate working place.
Industry:Mining
Flat strut that sometimes is used instead of an arch on the bottom of a tunnel cross section.
Industry:Mining