- 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 ...
The detonation velocity of an explosive or blasting agent under confinement, such as in a borehole.
Industry:Mining
The development of amphibole from pyroxene; specif. a late-magmatic or metamorphic process of replacement whereby uralitic amphibole results from alteration of primary pyroxene. Also, the alteration of an igneous rock in which pyroxene is changed to amphibole; e.g., the alteration of gabbro to greenstone by pressure metamorphism.
Industry:Mining
The development of clay minerals by the weathering of aluminum silicates. Compare: kaolinization
Industry:Mining
The development of enlarged sections in a borehole as the result of caving, erosive action of the circulated liquid, or erosion caused by drill rods rubbing against the borehole walls.
Industry:Mining
The development of new minerals in an igneous rock by the action of its own magmatic water on already existing magmatic minerals.
Industry:Mining
The development of poikilitic texture by the formation of inclusions and cavities along particular crystal planes, largely by solution somewhat as are etch figures.
Industry:Mining
The diameter of a circle tangent to the seating curve at the bottom of the tooth gap of a roller chain sprocket. Equal to the pitch diameter minus the chain-roller diameter.
Industry:Mining
The diameter of a circle that passes through the points of average contact between the teeth of two gears running in mesh, or between the teeth of a sprocket and the roller of its companion chain, or between a male and a female thread that are engaged.
Industry:Mining
The diameter of a steel wire rope is the maximum obtainable measurement across the outer edges of the strands. The size of fiber ropes is usually specified by their 2700 circumference. Modern steel wire winding ropes are large and heavy and may be 2-1/4 in (5.7 cm) in diameter for a moderately deep shaft.
Industry:Mining
The diameter of a unit density sphere having the same terminal settling velocity as the particle in question.
Industry:Mining
