13 Terms
Home > Industry/Domain > Mining > Mineral mining
Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
Sliding scale
Mining; General mining
A method of paying for the coal in proportion to the amount of lump coal it contains.
Chemical water treatment
Mining; General mining
A method of treating hard water by adding selected chemical substances that break down the offending impurities, the residue being passed on in solution in harmless or less harmful form, driven off ...
Open-tank method
Mining; General mining
A method of treating mine timber to prevent decay in which the timber is immersed in a tank of hot preservative and then in a tank of cold preservative. The preservatives used are creosote, zinc ...
Brush treatment
Mining; General mining
A method of treating mine timber in which the timber is painted with a preservative or is merely dipped into a tank of preservative. Preservatives used are creosote, zinc chloride, sodium fluoride, ...
Heading-and-bench
Mining; General mining
A method of tunnelling in hard rock. The heading is in the upper part of the section and is driven only a round or two in advance of the lower part or bench.
Spilling
Mining; General mining
A method of tunnelling through loose, running ground by driving spills (sharp-edged thick boards or steel rods) ahead and around timber or steel frames.
