- 行业: Mining
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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 ...
In scraper or truck loading, a term used to describe the volume of material the scraper will hold when the material is heaped. Frequently, sideboards are added to increase the heaped capacity. Heaped capacity will exceed struck capacity by approx. one-third, depending upon the heaping condition assumed. Compare: struck capacity
Industry:Mining
In scuba diving, divers with few exceptions should work in pairs. This is probably the greatest single aid toward scuba safety, esp. under unfavorable conditions. The divers should remain in sight of each other. In poor visibility, they should use a buddy line 6 to 10 ft (1.8 to 3.0 m) long.
Industry:Mining
In seismic exploration, the detonation of a small explosive charge in the weathering or low-velocity layer to determine its velocity characteristics and thickness.
Industry:Mining
In seismic exploration, the setting off of successive shots in a shothole at varying depths to determine velocities and velocity variation of the materials forming the walls of the hole.
Industry:Mining
In seismic operations in a watercovered area, a cable connecting geophones suspended by floats.
Industry:Mining
In seismic operations, a dip determined by spreads placed in four directions from a shot point. Three are essential, and the fourth serves as a check.
Industry:Mining
In seismic operations, a truck equipped to carry explosives, materials, and equipment for preparing, loading, tamping, and firing explosive charges.
Industry:Mining
In seismic prospecting, a detector placed to record successive shots under similar conditions, to permit overall time comparisons. Used in connection with the shooting of wells for velocity.
Industry:Mining
In seismic prospecting, a technique of applying a seismic pulse to the ground by detonating explosive charges in the air.
Industry:Mining
In seismic prospecting, the person who supervises the personnel of the crew and generally is in charge of interpretation of the data.
Industry:Mining
