Economic Geography - Minerals and Mining Activities

Which among the following is/are the methods of Mining?
  1. Quarrying
  2. Open Cast mining
  3. Shaft Mining
  4. Drilling 
Select the correct code from the options given below:
In what type of mining, minerals are just dug out of the rocks?
In what type of mining, the minerals are obtained from under the ground by means of making large dug out hollows?
In which type of mining, deep underground tunnels are made to obtain minerals?
Much of the coal produced in India is obtained through which among the following types of Mining?

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