- 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 ...
Female spore; part of the reproduction organs of many coal measures plants.
Industry:Mining
Driving pipe deep enough through overburden to keep soil, sand, etc., out of a borehole.
Industry:Mining
Corn. An early name for tin pyrite (stannite), so called because of its bronze color.
Industry:Mining
Power-operated machine used mainly for removing dirt and fines from material to be crushed. There are three main types--the live-roll grizzly, the vibrating-bar grizzly, and the bar grizzly feeder.
Industry:Mining
Particles possessing equal terminal velocities. They are the oversize material and form the underflow of a classifier.
Industry:Mining
In mining, a hygrometer used to obtain wet-bulb temperatures. The hygrometer is spun round and round at a speed of about 200 rpm, for at least 1 min, and then read as quickly as possible.
Industry:Mining
For an axially loaded bar, the load divided by the corresponding actual cross-sectional area. It differs from the stress as ordinarily defined because of the change in area due to loading.
Industry:Mining
Machines, such as rollers, to expel air from a soil mass and so achieve a high density. Smooth-wheel rollers are best for gravels, sands, and gravels-and-clay soils with reasonably high moisture contents. Pneumatic-tired rollers are best for clays with reasonably high moisture content, and sheepsfoot rollers are the best for clays with low moisture content.
Industry:Mining
Geology of surficial deposits, including soils; the term is sometimes applied to the study of bedrock at or near the Earth's surface.
Industry:Mining
