- 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 screwlike tool much like a large carpenters' bit or a short cylindrical container with cutting lips attached to a rod and operated by hand and used to bore shallow holes and obtain samples of soil and other relatively unconsolidated near-surface materials. Compare: auger
Industry:Mining
A sea adjacent to and connected with the oceans, but semienclosed by land. The North Polar, Mediterranean, and Caribbean Seas are examples.
Industry:Mining
A sea adjacent to and connected with the oceans, but semienclosed by land. The North Polar, Mediterranean, and Caribbean Seas are examples.
Industry:Mining
A seal made from polyvinyl chloride reinforced with glass fiber. It is inflated by compressed air and can cover or seal roadways up to 12 ft wide and 10« ft in height (about 4 m wide and 3 m in height). It is used to isolate a fire, or heating, and reduce the volume of smoke and gases so that erection of stoppings can proceed in respirable air without workers being hampered by breathing apparatus.
Industry:Mining
A secondary cell battery with an electromotive force of about 2 V. It is suitable for work where a steady voltage is required, and extensively used for motor car lighting, miners' safety lamps, shuttle cars, and battery locomotives.
Industry:Mining
A secondary method of fighting underground fires, devloped in Great Britain in 1956. It consists of filling the fire area with soap bubbles which are moved forward by the air current. The foam is produced by passing the air current through a cotton net, saturated with a dilute solution of detergent, which is stretched across the mine roadway. The air passing through the net forms bubbles 1/2 to 1-1/2 in (1.3 to 3.8 cm) in diameter which honeycomb and form a plug of foam that tends to quench the fire and reduce its temperature to a point where it can be attacked directly and without protective clothing.
Industry:Mining
