- 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 ...
The fractured ground outside of the fracture zone. In many mines, extradosal bursts occur more frequently than intradosal; i.e., the extradosal ground ahead of the working face serves as an abutment that supports the superincumbent rock to the surface.
Industry:Mining
The fractures caused by the shattering of a solid rock ledge back of the drill holes in which the charge is placed.
Industry:Mining
The framework for supporting the bottom strand of a belt conveyor.
Industry:Mining
The framing at the top of a shaft for the pulley wheels or sheaves for the hoisting rope.
Industry:Mining
The fraudulent adulteration of a sample, for example, adding a small amount of gold to a sample to make it appear that the gold content of the rock is much higher than it actually 2744 is. Salting may be accidental, caused by the fortuitous segregation of rich mineral during sampling. Sampling methods are conducted to reduce chance segregation to a minimum.
Industry:Mining
The frequency of free oscillation of a system. For a multiple-degree-of-freedom system, the natural frequencies are the frequencies of the normal modes of vibration.
Industry:Mining
The frequency of free vibration of a complete soil-foundation oscillating system. This frequency must differ distinctly from that of any machinery carried by the foundation if resonance is to be avoided.
Industry:Mining
The freshly split face of ashlar, squared off for the joints only, as it comes from the quarry, and used esp. for massive work. Distinguished from rock face.
Industry:Mining
The friable residue (as a metal oxide) left when a mineral or metal has been subjected to calcination or roasting; e.g., lime from calcium carbonate.
Industry:Mining
