- 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 ...
An instrument for measuring or comparing the turbidity of liquids in terms of the reduction in intensity of a light beam passing through the medium.
Industry:Mining
An instrument for measuring pressure head; usually consisting of a small pipe tapped into the side of a closed or open conduit and flush with the inside; connected with a pressure gage, mercury, water column, or other device for indicating head.
Industry:Mining
An instrument for measuring rock stress. Piano wire is tuned between two bolts cemented into drill holes in the rock, and a change of pitch after destressing is observed and used to indicate stress.
Industry:Mining
An instrument for measuring speed. In mining it is used on hoists lifting cages, cars, or skim in shafts or slope.
Industry:Mining
An instrument for measuring strains; e.g., in concrete linings to shafts or roadways. It contains a length of fine wire under tension, the tension being varied by the strain to which the gage is subjected. The measurement made is that of the frequency of vibration of the wire when it is plucked by means of an electromagnetic impulse, and this measurement can be made with great accuracy. The gage is highly stable, and readings can be made over a period of years without any fear of zero drift.
Industry:Mining
An instrument for measuring the area of any plane figure by passing a tracer around its boundary line.
Industry:Mining
An instrument for measuring the critical angle in a transparent solid.
Industry:Mining
An instrument for measuring the density or percentage of solids in slurries flowing through pipes. It normally uses a gamma-ray source, usually cesium-137 or cobalt-60, mounted in a lead-shielded holder on one side of the pipe. A radiation detector is mounted on the opposite side. Since the absorption of the gamma radiation, as it passes through the slurry, varies as a function of the density of the slurry, the change in radiation received by the radiation detector is representative of the specific gravity or percentage of solids in the slurry.
Industry:Mining
An instrument for measuring the elevation above sea level by determining the atmospheric pressure through observing the boiling point of water.
Industry:Mining
