Usually a shaft mine would be used, unless the ore deposits were in a "vein", then a open-pit mine would be used.
A shaft mine.
Shaft mine
strip mining
What type of deposits would be helpful. Basically, the ultrasound causes a vibration in what it is aimed at causing it to shatter.
Depends on what type of mine, where you are, and what type of alarm. Miners may evacuate (leave) the mine, or move to a refuge chamber.
It would depend on the size of the coal deposit, the intentions of the mine owner, and the type of extraction method.
A type of sedimentary rock that is formed from compressed sand would be: Sandstone.
Mica is a type of mineral that occurs as flakes, books, or sheets. It is mined. They are mined using techniques that extract mica from the metamorphic rock called schist, from placer deposits, and from pegmatites.
open pit mining
If it is the crock type the stain is from salt deposits, soak your pot in bleach and dishsoap, maybe use a light scrubber if it does not come off after an hour soak If it is the crock type the stain is from salt deposits, soak your pot in bleach and dishsoap, maybe use a light scrubber if it does not come off after an hour soak
There is no one type of mine used for ore.
calcific tendinitis