Rat hole mining is a process of digging holes to make narrow tunnels to extract coal. It is a illegal process which is still practiced in some north eastern region.
Rat hole mining can be done in two ways:
1.Side cutting :- The tunnel is dug from a side of a hill and this tunnel give access to the miners to extract coal reserves.
2.Box Cutting :- Narrow tunnel are dug vertically to the ground and through this tunnel many horizontal tunnel are dug at different height which give access to the miners for coal mining.
