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COAL MINING
- Thread starter beeloooo
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Which book u have.If u Have Huma Naz Sethi ones it's clearly written.
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in adit mining minerals are extracted from a hill side.....
in shaft mining vertical shafts are dug down to the minerals. Then tunnels are horizontally dug to the seam of minerals which is then removed through the minerals.....and dont know about open mining....
in shaft mining vertical shafts are dug down to the minerals. Then tunnels are horizontally dug to the seam of minerals which is then removed through the minerals.....and dont know about open mining....