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Cross-section
through coal
measures near
Leeds. Upper
seams worked
by opencast,
lower seams
by
underground.…read more

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Coal
· Geology of Coal Deposits
· Sedimentary Environment of Coal Deposits
Coal seams appear in the geological succession as layers
between repetitive, but NOT identical, sequences of shale,
siltstone, sandstone, ironstone, seatearth and then coal.
The overall ratio of coal to clastic rock is about 1:10 to 1:100.
The max thickness of coal bearing rock in UK occurs in S Wales
where it is about 2.5km thick.…read more

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Coal
· Geology of Coal Deposits…read more

Slide 5

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Opencast Coal Mining…read more

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Opencast Coal Mining
· Opencast using dragline
Shovel
& Truck Dragline
Overburden
Advance
dump
reduction
Highwall
Low-wall
Coaling…read more

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