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Review of Coal Resources in India and their Exploitation Strategy
Subscribe/Renew Journal
Gondwana coals of 213 bt have been further sub-divided into shallow (mineable) of 149 bt and deeper (unmineable) of 64 bt The lertiary coals of 254 bt have also been further sub-divided into shallow (mineable) of 12 bt and deeper (unmineable) of 242 bt Out of the 242 bt deeper (unmineable) Tertiary coals, 123 bt occur in Gujarat, 100 bt in Rajasthan and 19 bt in Tamilnadu
Out of 467 bt of reserves, 66% are deeper (unmineable), which need to be tapped by alternate means Three pronged strategy for their exploration and exploitation is suggested (1) Mining, of shallow coals/ lignites occurring at the depth of less than 300 m for power generation and industrial uses (2) Underground Coal Gasification (UCG), of low rank coals (lignite to sub-bituminous) occurring at moderate unmineable depths of 300-600m, where seams are relatively thicker (>3m), persistent with competent overburden strata and without much aquifer interference, and (3) Coalbed Methane (CBM) Extraction, from deeper (600-1500 m) unmineable coals of sub bituminous to bituminous rank.
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