- 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 ...
Sometimes applied by miners to structures such as pots, bells, kettles, and other rock masses that tend to fall easily from the roof of a coal mine.
Industry:Mining
Sometimes applied to anthracite coal when very small fractures are numerous and freshly broken surfaces display rounded or oval eyelike forms, many of which have convex surfaces.
Industry:Mining
Sometimes used as a deflocculant for clay slips; the effect is marked, only a small proportion being required. The material used for this purpose is generally prepared from NaOH and tannic acid; the former should be in excess and the pH should be about 8 to 9.
Industry:Mining
Sometimes used to designate a very high quality or grade of drill diamonds.
Industry:Mining
Sometimes used to designate the best quality of industrials normally used as drill diamonds.
Industry:Mining
Somewhat angular, free from sharp angles but not smoothly rounded; specif. said of a sedimentary particle showing definite effects of slight abrasion, retaining its original general form, and having faces that are virtually untouched and edges and corners that are rounded off to some extent.
Industry:Mining
