- Industry: 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 ...
In diving, this type of accident usually occurs as a result of contamination of the diver's air supply by exhaust gases from an internal-combustion engine.
Industry:Mining
In drilling, a diaphragm connected to the fluid column by a series of ports incorporated in the design of some core barrels and preventing the entry of drilling fluids into the core-barrel-head bearings.
Industry:Mining
In drilling, a reaming shell, the inset reaming diamonds of which are set into a cast- or powder-metal band encircling the outside surface of the shell.
Industry:Mining
In earthquake seismology, the time interval between the first arrivals of transverse (S) and longitudinal (P) waves, which is proportional to the distance from the earthquake source.
Industry:Mining
In elastic theory, a sphere under homogeneous strain is transformed into an ellipsoid with this property; the ratio of the length of a line, which has a given direction in the strained state, to the length of the corresponding line in the unstrained state, is proportional to the central radius vector of the surface drawn in the given direction. The ellipsoid whose half axes are the principal strains. Compare: reciprocal strain ellipsoid
Industry:Mining
In elastic theory, an ellipsoid of certain shape and orientation that under homogeneous strain is transformed into a sphere. Compare: strain ellipsoid
Industry:Mining
In electrical prospecting, an inductive method in which the current flows through an insulated copper cable connected to a source of alternating current and run along the surface in a rectangle 1 mile by 1/2 mile (1.6 km by 0.8 km) in dimensions. A series of transverse profiles are laid out perpendicular to and crossing the cable, and the magnetic part of the electromagnetic field is measured at discrete points along the profiles by special search coils consisting of several hundred turns of wire. The magnitude and direction of the induced field observed by the coils can be related to the inductive effect of the subsurface material directly below.
Industry:Mining
In electrolysis, a proportional fall in the number of ions concentrated at an electrode n=loss of concentration at cathode, and/or loss at cathode and anode. This phenomenon is caused by differences in the rate of travel of various species of ion.
Industry:Mining
