- 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 system of ventilation in which the districts (each with its separate split) are so arranged with regard to length and resistance, that the use of ventilation regulators is unnecessary. Regulators, although sometimes unavoidable, reduce the efficiency and increase the power required to ventilate the mine.
Industry:Mining
A system of ventilation in which the fan draws air through the workings by suction. Opposite of forced ventilation.
Industry:Mining
A system of ventilation in which the fan forces air through the workings under pressure.
Industry:Mining
A system of well boring in which percussive drills are used in connection with water forced down to the bottom of the hole through the drill rods. This water jet makes the tools cut better and washes the detritus up out of the hole.
Industry:Mining
A system of working minerals by removing the strata above the beds, after which the various beds are removed in steps or stages.
Industry:Mining
A system showing, by means of lights, the position of all switchgear underground, with a master control that would show up if a section of a mine had been switched off at the substation, leaving switches going into the mine in the on position. A recorder gives a complete operating picture of a power-loading face.
Industry:Mining
A system that enables breakdowns to be anticipated and arrangements made to perform the necessary overhauls and replacements in good time.
Industry:Mining
A system that indicates by electric light or electric audible signal, or both, the slowing down or stopping of a mine ventilating fan.
Industry:Mining
A system that permits calculating how hard an earth-moving tire should work and how much work it is doing. The Ton MPH for any tire is determined by multiplying the mean load and average speed. The resulting figure provides an index to the work a tire is doing. The system enables the operator to determine which type of tires to use to get top performance without overheating.
Industry:Mining
