- 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 tendency of an inclined diamond-drill hole to follow an upward-curving, increasingly flat course; also, the tendency of a diamond or other rotary-type bit to drill a hole curved in the updip direction when holes are drilled in alternating hard- and softlayer rock having bedding planes that cross the borehole at an angle other than 90 degrees to the face of the bit.
Industry:Mining
The tendency of coal to swell and open out when heated, thus exposing a surface out of all proportion to the size of the original coal.
Industry:Mining
The tension in the carrying run necessary to maintain the normal operating speed of a loaded belt.
Industry:Mining
The tension-carrying portion of a conveyor belt. It may be composed of multiple plies of fabric or cord, and simple layers of cord or steel cable, bonded together with rubber.
Industry:Mining
The term "mining purposes" as used in connection with mill-site locations, is very comprehensive, and may include any reasonable use for mining purposes that the quartz lode mining claim may require for its proper working and development. This may be very little, or it may be a great deal. The locator of a quartz lode mining claim is required to do only $100 worth of work each year until obtaining a patent.
Industry:Mining
The term applied to a royalty reserved in a sublease or assignment over and above that reserved in the original lease.
Industry:Mining
The term embraces a large number of power-operated digging and loading machines. Variants are the grab, skimmer, trencher, rotary digger, bucket wheel, and grader.
Industry:Mining
The term employed to designate the operations involved in preparing a mine for ore extraction. These operations include tunneling, sinking, crosscutting, drifting and raising.
Industry:Mining
The term generally applied to the lamp on a miner's safety hat or cap. Used for illumination only.
Industry:Mining
