- 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 ...
One of a series of short, triangular hogbacks forming a spur or ridge on the flank of a mountain, having a narrow apex and a broad base, resembling (when viewed from the side) a huge flatiron; it usually consists of a plate of steeply inclined resistant rock on the dip slope.
Industry:Mining
One of a set of small flanged steel wheels resting on a crawler track and supporting a track frame.
Industry:Mining
One of a variety of track devices to provide maximum safety for haulage trains in mines. Designed to be used in conjunction with switch signals, these devices include electric switch throwers operated by hand contractors on a copper plate, overhead hand controllers, remote control, or trolley contractors. Other safety equipment includes mechanical switches for gaseous or hot mines, derailing switches for trains out of control, and automatic mine-door opening devices.
Industry:Mining
One of four types of slope failure. Failure by rotational shear produces a movement of an almost undisturbed segment along a circular or spoon-shaped surface and occurs in comprehensive, uniform material. This material would not be affected by geological planes of weakness. Failure of this type can occur from causes that either increase the shear stresses or decrease the shear strength of the material.
Industry:Mining
One of four types of slope failure. Plane shear failure results when a natural plane of weakness, such as a fault, a shear zone, or bedding plane exists within a slope and has a direction such as to provide a preferential path for failure. Large intact portions of the slope rock may slide along this plane surface.
Industry:Mining
One of many conveyances that carry and then dump rock or ore. Generally trucks in surface mining and shuttle cars in underground mining.
Industry:Mining
One of many rheological models of material behavior. Rheology is the study of change in form and the flow of matter, embracing elasticity, viscosity, and plasticity. A Bingham material is elastic until the yield point is reached; flow occurs beyond the yield point.
Industry:Mining
One of several compounds that have been reported, including the following: NbB<sub>2</sub>; melting point, 3,050 degrees C; sp gr, 7.0; thermal expansion, 5.9 X 10<sub>-6</sub>parallel to a and 8.4 X 10<sub>-6</sub>parallel to c; NbB, melting point, 2,300 degrees C; sp gr, 7.6; Nb<sub>3</sub>B<sub>4</sub>melts incongruently at 2,700 degrees C; sp gr, 7.3.
Industry:Mining
One of several minerals including monazite, in which Th replaces rare earths; thorite, ThSiO<sub>4</sub>; and thorianite, ThO<sub>2</sub>.
Industry:Mining
One of several terms (and/or letter symbols) commonly used to designate low-quality drill diamonds.
Industry:Mining
