- 업종: Mining
- Number of terms: 33118
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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 black, massive, asphaltic pyrobitumen; sectile and infusible; closely related to uintahite; insoluble in turpentine; derived from metamorphosed petroleum; occurs in veins in Uinta County, Utah.
Industry:Mining
A blanket deposit of sand or sandstone of unusually wide distribution, typically an orthoquartzitic sandstone deposited by a transgressive sea advancing for a considerable distance over a stable shelf area; e.g., the St. Peter Sandstone of the East-Central United States.
Industry:Mining
A blanket deposit of sand or sandstone of unusually wide distribution, typically an orthoquartzitic sandstone deposited by a transgressive sea advancing for a considerable distance over a stable shelf area; e.g., the St. Peter Sandstone of the East-Central United States.
Industry:Mining
A blanket deposit of sand or sandstone of unusually wide distribution, typically an orthoquartzitic sandstone deposited by a transgressive sea advancing for a considerable distance over a stable shelf area; e.g., the St. Peter Sandstone of the East-Central United States.
Industry:Mining
A blast consisting of a number of unprimed charges of explosives and only one hole primed, generally for the purpose of ditching, where each charge is detonated by the explosion of the adjacent one, the shock being transmitted through the wet soil. In this method, one detonator fired in the middle of a line of holes is capable of bringing about the explosion of several hundred such charges.
Industry:Mining
A blast furnace, reverberatory furnace, or electric furnace in which ore is smelted for the separation of a metal.
Industry:Mining
A blast in a coal mine which--due to improperly placed charges, the wrong kind or quantity of explosives, or insufficient stemming--expends most of its force on the mine air; it sometimes ignites a gas mixture, coal dust, or both, thus causing a secondary explosion, which may or may not spread throughout the mine; a shot that blows out without disturbing the coal; a shot that is not properly directed or loaded; a blown-out shot.
Industry:Mining
A blast made in a shaft that is being sunk, to make a collecting place for water.
Industry:Mining
