In Sondiha block a total of 50.423 MT of net proved reserves have been estimated. It consists of 31.480 MT of opencast reserve and 18.942 MT of underground reserve. The grade of coal ranges from C to E.
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According to the Environment Impact Assessment (EIA) report, the rated capacity of mine is 1.00 MTPA of coal. The block shall be operated by opencast and underground method of mining. The rated capacity 1.00 MTPA of coal shall be achieved by opencast mining method from first year to 15th year.
After 15th year the mine shall be operated both by opencast mining and underground mining. From 16th year onwards coal production from Opencast Mine shall be 0.75 MTPA and remaining 0.25 MTPA shall be produced from Underground Mine. The life of the opencast mine shall be 33 years and in total the life of the combined mine (opencast and underground) shall be 36 years.
The CMDCL official said the coal block had been reserved to feed the raw material demand of small enterprises set up in Chhattisgarh.