Industry Glossary

Industry Glossary

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Term Definition
Taconite
A highly abrasive iron ore.
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.
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.
Tailings
Material rejected from a mill after most of the recoverable valuable minerals have been extracted.
Tailings pond
A low-lying depression used to confine tailings, the prime function of which is to allow enough time for heavy metals to settle out or for cyanide to be destroyed before water is discharged into the local watershed.
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.
Talus
A heap of broken, coarse rock found at the base of a cliff or mountain.
Telluride
A chemical compound consisting of the element tellurium and another element, often gold or silver.
Tension
The act of stretching.
Tertiary
Lateral or panel openings (e.g., ramp, crosscut).
Thickener
A large, round tank used in milling operations to separate solids from liquids; clear fluid overflows from the tank and rock particles sink to the bottom.
Through-steel
A system of dust collection from rock or roof drilling. The drill steel is hollow, and a vacuum is applied at the base, pulling the dust through the steel and into a receptacle on the machine.
Timber
A collective term for underground wooden supports.
Timber set
A timber frame to support the roof, sides, and sometimes the floor of mine roadways or shafts.
Timbering
The setting of timber supports in mine workings or shafts for protection against falls from roof, face, or rib.
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.
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.
Tonnes-per-vertical-metre
Common unit used to describe the amount of ore in a deposit; ore length is multiplied by the width and divided by the appropriate rock factor to give the amount of ore for each vertical metre of depth.
Top
A mine roof; same as back.
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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