- 行业: 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 ...
The nearly uniform inclination of strata over a wide area, generally at a low angle, as in the Atlantic and Gulf coastal plains and parts of the Midcontinent region. Compare: homocline
Industry:Mining
The negative logarithm (base 10) of the hydrogen-ion activity. It denotes the degree of acidity or of basicity of a solution. At 25 degrees C, 7 is the neutral value. Acidity increases with decreasing values below 7, and basicity increases with increasing values above 7.
Industry:Mining
The never-completed program to drill through the Earth's crust under the ocean to the Mohorovicic discontinuity in order to provide scientific knowledge of the Earth's mantle.
Industry:Mining
The Newtonian law of motion states that the product of mass and acceleration equals the vector sum of the forces.
Industry:Mining
The noise produced in a liquid by the collapse of bubbles that have been created by cavitation.
Industry:Mining
The nominal period between the firing of successive delay detonators in a series of shots.
Industry:Mining
The nonexistent norm of a gas, which perfectly obeys Boyle's law of gases, in which the pressure of the gas times its volume equals a constant.
Industry:Mining
The normal method of measuring soil density. In its simplest form, the measurement requires only a container full of dry sand of known density, a balance and apparatus for determination of soil moisture content.
Industry:Mining
The normal ventilation produced in a mine as the air flows from the intake to the return, as opposed to ventilation produced locally by auxiliary fans.
Industry:Mining
