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At the New Almaden quicksilver mine, in California, at a depth of about 600 feet the temperature was very high - some 115 degrees; but in the deepest part of the same mine, 1,800 feet below the surface and 500 feet below sea level, the temperature is very pleasant, probably less than 80 degrees.
The mine shaft is used to admission to an underground mining capability. Horizontal workings off the shaft are known as drifts, galleries or levels. These expand from the central shaft towards the ore body. The point of contact among these levels and the shaft itself is called the inset, shaft station or plat.nderground mining is selected when the rock or mineral is so far to reach using surface mining. Shaft mining is the kind of mine that you normally see in movies where the miner travels straight down into a profound, dark tunnel until he reaches the base.