- 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 ...
An enclosure for electrical apparatus that will withstand, without injury, any explosion of the prescribed flammable gas that may occur within it under practical conditions of operation within the rating of the apparatus (and recognized overloads, if any, associated therewith), and will prevent the transmission of flame such as will ignite the prescribed flammable gas that may be present in the surrounding atmosphere.
Industry:Mining
An end clinometer the bottom end of which is shaped to match the wedge-guide pin on the drive wedge; hence the two can be fastened together with copper shear rivets. When a drive wedge is driven into a wooden plug in a borehole the copper rivets break; after the clinometer has been removed from the borehole, the relation of the bearing and inclination readings to the flat face of the projection on the bottom of the clinometer case can be used to orient and place the deflection wedge in a manner so as to direct the deflected hole to follow the desired course. Compare: plain clinometer; line clinometer.
Industry:Mining
An end of rope having a reduced diameter to facilitate threading the rope through fittings and over pulleys.
Industry:Mining
An end support to a beam or a column that cannot develop the full fixing moment.
Industry:Mining
An endless chain of plates that functions as a wheel for heavy vehicles.
Industry:Mining
An endless chain of plates used instead of wheels by certain power shovels, continuous miners, etc.
Industry:Mining
An endless chain supported by trolleys from an overhead track or running in a track at (above, flush with, or under) the floor with means for towing trucks, dollies, or cars.
Industry:Mining
An endless chain, with projecting bars at intervals that catch the car axles and haul them up an inclined plane. Creepers are used on the surface and around the pit bottom. They are also used on relatively flat roadways to retard or propel the cars as required.
Industry:Mining
An endless line of digging buckets on a dredger or on a bucket elevator.
Industry:Mining
An endless rope haulage in which the ropes run under the cars. The cars are attached singly or in short sets by clips.
Industry:Mining
