- 行业: 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 respirator for which maintenance is not intended and that is designed to be discarded after excessive resistance, sorbent exhaustion, physical damage, or end-of-service-life renders it unsuitable for use. Examples of this type of respirator are a disposable halfmask respirator or a disposable escape-only self-contained breathing apparatus.
Industry:Mining
A respirator in which ambient air is passed through an air-purifying element that removes the contaminants. Air is passed through the air-purifying element by means of the breathing action or by a blower.
Industry:Mining
A respiratory device used by miners for the purpose of escape during mine fires and explosions; it provides the wearer a closed-circuit supply of oxygen for a minimum of 10 min and up to 1 h.
Industry:Mining
A respiratory device used by miners for the purpose of escape during mine fires and explosions; it provides the wearer a closed-circuit supply of oxygen for a minimum of 10 min and up to 1 h.
Industry:Mining
A rest period for crews at furnace, stock house, etc., or a period of work in drilling the taphole; a change or turn.
Industry:Mining
A result of honeycomb weathering, consisting of small pits in a rock surface that become fewer as they grow larger and deeper.
Industry:Mining
A retaining wall of reinforced concrete having a relieving platform built onto its upper part.
Industry:Mining
A retaining wall tied into the adjoining ground by means of a deadman (wood block) or other suitable anchorage.
Industry:Mining
A retarder that consists of lengths of steel channel with attached rubbing strips that operate on the face of the wheels above center. The action is controlled by a hydraulic cylinder containing opposed pistons. The hydraulic pressure is supplied from an accumulator in which pressure is maintained by means of a 5-hp (3.7-kW) electric motor-driven pump that is sufficient for 10 retarder unit.
Industry:Mining
