- 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 ...
A method of blasting using a number of relatively large concentrated charges of explosives placed in one or more small tunnels driven in a rock formation.
Industry:Mining
A method of block caving in which the caved ore is extracted through drifts supported by square sets. A retreating system is adopted.
Industry:Mining
A method of borehole surveying, consisting essentially of a timing clock, batteries and light bulb, a floating light-transparent compass, an inclination unit, and a photographic film for recording both the position of the compass and the crosshairs of the inclinometer. The instrument is enclosed in a nonmagnetic casing.
Industry:Mining
A method of boring somewhat similar to Fauck's. Hollow steel rods 2 in (5.08 cm) in diameter are used with a mud flush. A walking beam, fitted with steel springs, imparts from 80 to 120 short blows/min to the chisel.
Industry:Mining
A method of boxing core. Beginning in the upper-right-hand corner of the core box the core is run from right to left in the first row, from left to right in the second row, left to right in the third, etc., until the box is filled. Compare: reverse book fashion
Industry:Mining
A method of breaking coal from the solid seam by the use of explosives, when the seam has not previously been cut or sheared to prepare the coal for blasting.
Industry:Mining
A method of breaking coal from the solid seam by the use of explosives, when the seam has not previously been cut or sheared to prepare the coal for blasting.
Industry:Mining
A method of breaking down a compound in its natural form or in solution by passing an electric current through it, the ions present moving to one electrode or the other where they may be released as new substances.
Industry:Mining
A method of breaking down coal by the use of high-pressure compressed air.
Industry:Mining
A method of breaking down coal similar to Hydrox and applied on the same lines as air shooting.
Industry:Mining
