Mine Terms H

Cornish Mine Terms

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Home page Ore Dressing Engine House structure Engine House external features Team Manley South Caradon Mine East Caradon Mine Great Rock Mine

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Term	Definition	Examples
Halvans	Low quality ore. In a copper mine Halvans consisted of the ore that had to be stamped before being treated by trunking,buddling and Tozing.	Copper ore dressing terms
Heave	The horizontal displacement of a lode caused by a fault or cross course. A Heave in a lode may cause problems in follwing its course underground.	Map with heave on loders shown
Hematite	A common iron ore Fe₂O₃ (red) Often used as pigments	Great Rock
Horizontal engine	A steam engine in which the cylinders are mounted horizontally on stone beds.The power was applied direct to a crankshaft and no beam was required. In the later part of the 19th Century this became the most common winding engine being installed and it used steam at a higher pressure than the Cornish engine. Without the need for a strong bob wall the building housing Horizontal engines were far less massive than those of beam engines	S Caradon Sump Shaft
Headgear or Head frame	The steel or wooden frame over the shaft to carry pulleys or sheave wheels for hoisting. Wires from the whim engine passed over this wheels and the gear normally stood adjacent to a pump engine. Lighter temporary headgear was sometimes installed during the sinking of a new shaft.	S Caradon sump shaft
Horse whim	A winding device using power supplied by a horse walking around a circular platform and applied to an overhead winding drum.Horse whims were often used for winding from small shafts on Cornish mines especially during shaft sinking.