- 行业: Mining
- Number of terms: 33118
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- 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 physiographic feature having a broad base and an apex pointing upward; specif. the face on the end of a faceted spur, usually a remnant of a fault plane at the base of a block mountain. A triangular facet may also form by wave erosion of a mountain front or by glacial truncation of a spur.
Industry:Mining
A physiographic feature having a broad base and an apex pointing upward; specif. the face on the end of a faceted spur, usually a remnant of a fault plane at the base of a block mountain. A triangular facet may also form by wave erosion of a mountain front or by glacial truncation of a spur.
Industry:Mining
A physiological method of assessing the effect of a given climate upon workers, that is based on the ratio between the heat actually lost by the body via the skin, lungs, etc., and the maximum that can be lost in the prevailing conditions.
Industry:Mining
A pick with a head for breaking away hard partings in coal seams or knocking down rock already seamed by blasting.
Industry:Mining
A pick with one or two points, formed of flat iron, used to undercut coal by scraping instead of striking.
Industry:Mining
A pictorial view of an object showing its elevation, plan, or section to scale with parallel lines projected from the corners, at 45 degrees or any other angle, indicating the other sides.
Industry:Mining
A piece of bituminous shale embedded in the rock immediately over the coal measure and liable to fall of its own weight when the coal beneath it has been removed. Compare: kettle bottom
Industry:Mining
