- 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 ...
The length of a straight line through the center of a sedimentary particle considered as a sphere; a common expression of particle size.
Industry:Mining
The length of belt, chain, cable, or other linkage which passes a fixed point within a given time. It is usually expressed in terms of feet per minute. In the case of the rolling chain conveyor, the load is moved at a rate double the chain speed. In screw conveyors, the speed is expressed in terms of revolutions per minute and the speed at which the material is conveyed is dependent upon speed, pitch of the screw, type of flight, angle of inclination, nature of material, etc.
Industry:Mining
The length of borehole that can be drilled with a steel bit until it must be resharpened.
Industry:Mining
The length of drill rod that will withstand flexure or bending when subjected to a specific feed pressure or compressional load.
Industry:Mining
The length of each portion of a blast hole filled with explosive materials.
Industry:Mining
The length of one side of the polygon formed by the lines between the joint centers as a chain is wrapped on a sprocket. It is a chord of the sprocket pitch circle and is equal to the chain pitch.
Industry:Mining
The length, measured along the longitudinal axis of the working, tunnel, or gallery, of the hollow space broken out by each round of shots. For raises, it is upward advance; for sunk shafts, downward advance.
Industry:Mining
The lengths of crystallographic axes defined in terms of their ratios with, by convention, a set at unity where one axis is unique and b set at unity where all three axes are required.
Industry:Mining
The level at which a cage comes to rest at the pit head and pit bottom for unloading and loading mine cars.
Industry:Mining
