Mining is the process of extraction of metals from a mineral deposit
Types of mining
(a) Surface mining: Surface mining is the process of extraction of raw materials from the near-surface deposits.
(b) Underground mining: It is the process of extraction of raw materials below the earth's surface. It includes
i) Open-pit mining:
In open-pit mining machines dig holes and remove the ores.
Ex: Iron, copper, limestone, sand stone, marble, etc.,
(ii) Dredgeing:
In dredging, chained buckets and draglines are used, which scrap up the minerals from under-water mineral deposit.
(iii) Strip mining:
In strip mining, the ore is stripped off by using bulldozers, stripping wheels