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List Of Articles : T |
Tail section
A term used in both belt and chain conveyor work to designate that portion of the conveyor at the extreme opposite end from the delivery point. In either type of conveyor it consists of a frame and either a sprocket or a drum on which the chain or belt travels, plus such other devices as may be required for adjusting belt or chain tension.
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Tailgate
A subsidiary gate road to a conveyor face as opposed to a main gate. The tailgate commonly acts as the return airway and supplies road to the face.
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Tailings
Tailings are the residues of ores after the valuable mineral constituents have been extracted (finely-ground rock particles of no practical or economic value, mixed with water).
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Tailings dam
A storage area designed to safely store tailings in perpetuity.
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Tailpiece
Also known as foot section pulley. The pulley or roller in the tail or foot section of a belt conveyor around which the belt runs.
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Tension
The act of stretching.
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Thermal regeneration
The process of heating activated carbon granules typically to 750 degrees Celsius to restore the properties of carbon for the next gold extraction cycle.
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Thickener
A thickener helps reducing the water content of solid – water slurry down to a water content of about 50 %.
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Timber set
A timber frame to support the roof, sides, and sometimes the floor of mine roadways or shafts.
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Timbering
The setting of timber supports in mine workings or shafts for protection against falls from roof, face, or rib.
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Tipple
Originally the place where the mine cars were tipped and emptied of their coal, and still used in that same sense, although now more generally applied to the surface structures of a mine, including the preparation plant and loading tracks.
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Ton
Used in imperial statistics. Equal to 2,000 pounds. Referred to as a short or net ton. A short or net ton is equal to 2,000 pounds; a long or British ton is 2,240 pounds; a metric ton is approximately 2,205 pounds.
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Tonnage
Quantities where the ton or tonne is an appropriate unit of measure. Typically used to measure resources and reserves of metal/coal-bearing material in situ or quantities of ore and waste material mined, transported or milled.
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Tonne
Used in metric statistics. Equal to 1,000 kilograms. See also Ton.
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Top
A mine roof; same as ‘back.’
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Torque wrench
A wrench that indicates, as on a dial, the amount of torque (in units of foot-pounds) exerted in tightening a roof bolt.
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Total production costs (total cash costs per unit mine product)
A measure of the average cost of producing an unit of mine product (e.g. ounce of gold), calculated by dividing attributable total production costs in a period by attributable total mine production over the same period. Total production costs represent total cash costs, plus depreciation, depletion and amortization, employee severance costs and rehabilitation and other non-cash costs.
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Tractor
A battery-operated piece of equipment that pulls trailers, skids, or personnel carriers. Also used for supplies.
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Tram
Used in connection with moving self-propelled mining equipment. A tramming motor may refer to an electric locomotive used for hauling loaded trips or it may refer to the motor in a cutting machine that supplies the power for moving or tramming the machine.
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Transfer
A vertical or inclined connection between two or more levels and used as an ore pass.
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Transfer point
Location in the materials handling system, either haulage or hoisting, where bulk material is transferred between conveyances.
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Trip
A train of mine cars.
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Troughing idlers
The idlers, located on the upper framework of a belt conveyor, which support the loaded belt. They are so mounted that the loaded belt forms a trough in the direction of travel, which reduces spillage and increases the carrying capacity of a belt for a given width.
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Troy ounce
(Used in imperial statistics) Equal to 31.10348 grams.
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Tunnel
A horizontal, or near-horizontal, underground passage, entry, or haulageway, that is open to the surface at both ends. A tunnel (as opposed to an adit) must pass completely through a hill or mountain.
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