Support or Shaft Lining
There are two types of lining,
- Temporary
- Permanent
The type of water and strength of the rock and soil layer where sinking operation is done determine which option to select. Therefore, in some cases, temporary support is not adopted, while in others it becomes essential to protect the crew and equipment from any side fall.
The permanent lining can be made of bricks, concrete blocks, monolithic concrete, shotcrete and cast iron tubing.
Read more about this topic: Shaft Construction, Shaft Sinking, Activities Required For Shaft Sinking
Famous quotes containing the words support and/or shaft:
“All experience teaches that, whenever there is a great national establishment, employing large numbers of officials, the public must be reconciled to support many incompetent men; for such is the favoritism and nepotism always prevailing in the purlieus of these establishments, that some incompetent persons are always admitted, to the exclusion of many of the worthy.”
—Herman Melville (1819–1891)
“Lord, crack their teeth! Lord, crush these lions’ jaws!
So let them sink as water in the sand;
When deadly bow their aiming fury draws,
Shiver the shaft ere past the shooter’s hand.
So make them melt as the dishoused snail”
—Bible: Hebrew Psalm LVIII (Paraphrased by the Countess of Pembroke)