- 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 drive equipped with a "caterpillar chain" that engages and propels the "conveyor chain."
Industry:Mining
A drive is underchained when it incorporates a chain of substantially lower rating than that indicated by normal selection procedures.
Industry:Mining
A drive often made in a section, esp. in gently inclined deposits, that divides the deposit into narrower panels and zones. They are narrower, and the support and equipment for them is more simple than that required in level drives.
Industry:Mining
A drive sampler equipped with either a free or a retractable-type piston that retreats up into the barrel of the sampler in contact with the top of the soil sample as the sampler is pressed into the formation being sampled. Compare: drive sampler.
Industry:Mining
A drive that opens up a deposit and makes it accessible along its length and forms the basis for the division of the deposit into levels.
Industry:Mining
A drivepipe or casing shoe with a serrated or toothed cutting edge.
Industry:Mining
A driver based on the principle of delivering vertical vibrations to the head of a pile in alternating up and down cycles at a rate of 100 Hz. These vibrations set up highamplitude waves of tension and compression in the pile, producing alternate expansion and contraction in minute amounts. The elongation of the pile in expansion displaces the soil at the pile tip, and the weight of the pile, hammer, and added loads shoves the pile into the miniscule void. Since this action is occurring at the rate of 100 Hz, the individual movements need not be of great magnitude to produce rapid penetration of the pile.
Industry:Mining
A drive-sample barrel in which a piston is free to move upward with the top of the sample during the actual dry-sampling operation.
Industry:Mining
A drive-type soil sampler with a split barrel; also a swivel-type double-tube core barrel, the inner tube of which is split.
Industry:Mining
