Chayan Sarkar

An opencast coal mine stops digging at its final wall, but the seam does not stop there. It…

On an opencast mine, the haul trucks make most of the dust. Field studies at surface mines put…

Every millimetre of rain that falls on a square metre of ground adds one litre of water. So…

Bench height in opencast mining is decided by one machine: the excavator or shovel that digs the face.…

Overburden removal is the digging and hauling away of the soil and rock that lie over a mineral,…

Indian concrete is built from four aggregate sizes in practice: 10 mm, 20 mm, 40 mm and, for…

If you are choosing between a jaw crusher and a cone crusher, the real question is which goes…

Three questions decide how any mine in India is organised: who owns the mineral, who holds the concession…

The lease is not the last paper you collect before a quarry opens. It is the first, and…

A mining lease signed before 12 January 2015 pays about 1.32 times its royalty. A lease granted after…

Quarry dust, M-sand and river sand all pass the same 4.75 mm sieve, and that line is where…

Open cast mining is mining done from the surface. The soil and rock lying over the mineral are…