- المجال: 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 rolling mill unit used for breaking-down operations; a rolling mill used for reducing sectional dimensions, mainly thickness--of ingots, billets, and other rough, semifinished products--as a preliminary step to subsequent rolling operations.
Industry:Mining
A roof support method following two basic principles: (1) that of drilling holes vertically or at an angle into the roof and anchoring roof bolts into a strong firm structure above the lower weak layers, thereby suspending the weak roof on bolts from the strong roof above; and (2) the binding of several layers of weak strata into a beam strong enough to support its weight across the working place. The advantage of pin timbering is that support can be provided at the face without posts being in the way of equipment and more freedom is provided for shuttle cars and other equipment in tramming.
Industry:Mining
A roof that is tenacious and when allowed to fall breaks down in large blocks or frames of stone.
Industry:Mining
A room or building at the surface of a mine provided for charging, servicing, and issuing all cap, hand, and flame safety lamps held at the mine.
Industry:Mining
A rope cappel used in Koepe winding, particularly in Germany. The rope is led along the side of the eye and secured by a hinged retaining arm lined with rubber, and then turned around the eye and held in position by pressure exerted by knee-action links.
Industry:Mining
A rope composed of a number of strands, generally six in number, twisted together or laid to form the rope around a core of hemp, sisal, or manilla, or, in a wire-cored rope, around a central strand composed of individual wires.
Industry:Mining
A rope composed of a sufficient number of wires and strands to ensure strength and flexibility. Such ropes are used in shafts, elevators, quarries, etc.
Industry:Mining
