- Industry: 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 ...
Dynamites composed of nitroglycerin, a combustible such as wood meal, sodium nitrate, and an antacid, such as calcium or magnesium carbonate, and are made in 15% to 60% strength, the percentage representing the proportion of nitroglycerin in the dynamites. They are powerful, quick acting, and fairly water resistant, but on detonation produce poisonous gases, esp. in the higher grades. Their relatively high cost, sensitivity to shock and friction, and high flammability, together with the dangerous fumes developed, make them less suitable for general use than more recently developed modifications.
Industry:Mining
Dynamites made by replacing part of the nitroglycerin of straight dynamites with some ingredient to render the dynamite incapable of freezing under ordinary conditions of use. The freezing point is depressed by adding nitro substitution compounds, such as nitrated sugars, nitrotoluene, nitrated polymerized glycerin, or ethylene glycol dinitrate.
Industry:Mining
Each 12th of crystal space defined by a trigonal or hexagonal c axis and its orthogonal three coplanar a axes. Compare: octant
Industry:Mining
Each eighth of crystal space divided by three noncoplanar axial planes. Compare: dodecant
Industry:Mining
Early form of autogenous grinding mill, in which comminution resulted from the fall of ore on ore during the rotation of a large-diameter horizontal cylinder.
Industry:Mining
Early name applied to tourmaline because of its polar electrostatic property.
Industry:Mining
Earth materials that are combustible, physically unstable, or acid- or toxic-forming, which are wasted or otherwise separated from product coal. They are slurried or otherwise transported from coal-preparation plants, after physical or chemical processing, cleaning, or concentrating of coal.
Industry:Mining
Earth materials that contain sulfide minerals or other materials that, if exposed to air, water, or weathering processes, form acids that may create acid drainage.
Industry:Mining
