- 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 ...
Under Metal Exchange rulings, description of metal delivered at an agreed purity or of a defined quality.
Industry:Mining
Underground boreholes and blastholes exceeding 10 ft (3.05 m) in depth or requiring the use of two or more lengths of drill steel or rods coupled together to attain the desired depth. Compare: long-hole drill
Industry:Mining
Underground mining technique based on underhand stoping and cut-and-fill stoping with a single advancing face.
Industry:Mining
Underpoled copper from which oxygen has been insufficiently removed when refining, so that it is undesirably brittle when worked cold or hot.
Industry:Mining
Undiscovered resources that are similar to known mineral bodies that may be reasonably expected to exist in the same producing district or region under analogous geologic conditions. If exploration confirms their existence and reveals enough information about their quality, grade, and quantity, they will be reclassified as identified resources.
Industry:Mining
Undiscovered resources that may occur either in known types of deposits in favorable geologic settings where mineral discoveries have not been made, or in types of deposits as yet unrecognized for their economic potential. If exploration confirms their existence and reveals enough information about their quantity, grade, and quality, they will be reclassified as identified resources.
Industry:Mining
