- 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 ...
A measure of the degree to which a substance is attracted to a magnet; the ratio of the intensity of magnetization to the magnetic field strength. See: susceptibility
Industry:Mining
A measure of the directional properties of a transducer. It is the ratio in decibels of the average intensity of response over the whole sphere surrounding the projector or hydrophone to the intensity or response on the acoustic axis.
Industry:Mining
A measure of the ease or difficulty with which a rock or earth material can be broken by tractor-drawn rippers or rigid steel tines into pieces that can be economically moved by other equipment, usually scrapers.
Industry:Mining
A measure of the ease with which a conduction current can be caused to flow through a material under the influence of an applied electric field. It is the reciprocal of resistivity and is measured in mhos per meter.
Industry:Mining
A measure of the energy available per unit volume of explosive as compared to an equal volume of ANFO at a density of 0.81 g/cm<sub>3</sub>; it is calculated by dividing the bulk strength of an explosive by the bulk strength of ANFO and multiplying by 100.
Industry:Mining
A measure of the grindability of a material under specified grinding conditions, expressed in terms of volume of material removed per unit volume of wheel wear.
Industry:Mining
A measure of the intensity of ground vibration generated from a blasting event, specif. the time rate of change of the amplitude of ground displacement, given in inches (or millimeters) per second.
Industry:Mining
A measure of the progress of a clastic sediment in the direction of chemical or mineralogic stability; e.g., a high ratio of alumina-soda, of quartz-feldspar, or of quartz + chert-feldspar + rock fragments indicates a highly mature sediment.
Industry:Mining
A measure of the proportion of the weight resting on tracks or drive wheels that can be converted into vehicle movement.
Industry:Mining
A measure of the protection provided in the workplace by a properly functioning respirator when correctly worn and used.
Industry:Mining
