- 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 series of trolleys supported from or within an overhead track and connected by an endless propelling medium, such as a chain, a cable, or other linkage, with loads usually suspended from the trolley. Trolley conveyors may be designed for single or multiple plane operation.
Industry:Mining
A series of two or more holes drilled as closely together as possible, then connected by knocking out the thin partition between them, forming thus one wide hole, having its greatest diameter in a plane with the desired rift. Blasts from such holes are wedgelike in their action, and by means of them larger and better-shaped blocks can be taken out than would otherwise be possible.
Industry:Mining
A series of wheels supported in a frame over which objects are moved manually or flow by gravity.
Industry:Mining
A series or sequence of delay detonators designed to satisfy specific blasting requirements. There are basically two types; millisecond (MS) and long period (LP).
Industry:Mining
A serrated-face, hardened-metal, noncoring, cone-shaped bit used primarily to mill off part of the stabilizing or rose ring on the top end of a Hall-Rowe deflecting wedge.
Industry:Mining
A set of intersecting very fine lines, wires, etc., in the optical focus of an optical instrument. It is also referred to as graticule.
Industry:Mining
A set of metamorphic mineral assemblages, repeatedly associated in space and time, such that there is a constant and therefore predictable relation between mineral composition and chemical composition. It is generally assumed that the metamorphic facies represent the results of equilibrium crystallization of rocks under a restricted range of externally imposed physical conditions; e.g., temperature, lithostatic pressure, and water pressure.
Industry:Mining
A set of metamorphic mineral assemblages, repeatedly associated in space and time, such that there is a constant and therefore predictable relation between mineral composition and chemical composition. It is generally assumed that the metamorphic facies represent the results of equilibrium crystallization of rocks under a restricted range of externally imposed physical conditions; e.g., temperature, lithostatic pressure, and water pressure.
Industry:Mining
