- 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 ...
A shotfiring cord together with connecting wires and electric blasting caps used in preparation for the firing of a blast in mines, quarries, and tunnels.
Industry:Mining
A shothole drilled at an acute angle to the coal face for the purpose of trimming it.
Industry:Mining
A shothole in which the explosive charge breaks down the coal at the back of the machine cut while leaving the front portion standing or in large blocks. This may happen with a deep bottom cut in a thin seam where the vertical distance from the explosive to the inner end of the cut is shorter than the horizontal distance to the exposed face of the seam.
Industry:Mining
A shovel boom that can be lifted and lowered without interrupting the digging cycle.
Industry:Mining
A shovel equipped with a jack boom, a live boom, a hinged stick, and a rigidly attached bucket, that digs by pulling toward itself.
Industry:Mining
A shovel equipped with a jack boom, a live boom, a hinged stick, and a rigidly attached bucket, that digs by pulling toward itself.
Industry:Mining
A shovel equipped with a jack boom, a live boom, a hinged stick, and a rigidly attached bucket, that digs by pulling toward itself.
Industry:Mining
A shovel equipped with a jack boom, a live boom, a hinged stick, and a rigidly attached bucket, that digs by pulling toward itself.
Industry:Mining
A shovel loader, driven by compressed air or by electricity, for loading loose coal or rock. A bucket of capacity 21 ft<sub>3</sub>(0.59 m<sub>3</sub>), hinged to the chassis, digs, lifts, and discharges the material sideways onto a scraper or belt conveyor; suitable for stable holes, pillar methods of working, and general repair work.
Industry:Mining
