- المجال: 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 velocity, different from the steady state velocity, which a primer imparts to a column of powder to start detonation.
Industry:Mining
A ventilating fan that takes or receives its air from one side only.
Industry:Mining
A ventilating furnace in which the foul flammable air from remote parts of the mine enters the upcast higher up than the hot gases from the fire.
Industry:Mining
A ventilation circuit with two adjacent intake roadways leading to the coalface. The method has been criticized because the air flow may become so sluggish as to cause combustible gases layers.
Industry:Mining
A ventilation control consisting of a stopping or a curtain with a hole, through which a conveyor can pass. The box check serves as a ventilation regulator in a belt haulage entry.
Industry:Mining
A ventilation door consisting of two halves, so constructed that they are forced apart centrally by the trams as they come in contact with the converging beams that operate them. The door halves move on small pulleys that run on inclined rails so that after the passage of the trams the door closes by gravity.
Industry:Mining
A ventilation stopping or separation door through which a conveyor has to run. It consists of at least two well-built partitions, each with some form of airlock designed to pass the belt and yet to reduce to a minimum the leakage of air and the raising of dust. An airlock chute is sometimes used.
Industry:Mining
A ventilation system in which a number of downcast shafts arranged around the periphery of the working area are served by a common upcast shaft within the area, or vice versa. Sometimes known as compound ventilation.
Industry:Mining
A ventilation system in which the downcast air is conducted to the top end of the workings (in inclined workings) and it then flows downhill from level to level. In deep mines, the system helps to keep the faces cool.
Industry:Mining
A ventilation system is composed of a fan and a set of connected ducts. In a mine ventilation system, mine openings comprise the ducts. At a given air density and with the fan operating at constant speed, there is only one head and quantity of airflow that can result. This is an equilibrium condition and is known as the operating point of the system.
Industry:Mining
