The Banai and Bhalumuda coal blocks in Chhattisgarh are adjacent to each other and facing difficulty in dumping of overburden as the area surrounding the blocks is coal bearing, an official said.
"It was informed to NTPC that if the blocks are found economically and technically unviable, then there is a provision in CBDPA (Coal Block Development and Production Agreement) to surrender the blocks after the exploration period is over... They (NTPC) are consulting CMPDIL for the same," the official said.
Banai coal block was alloted to NTPC in March 2015 and the production is expected by 2020. Bhalumuda coal block was also alloted in the same year and the production is expected by 2021.
NTPC had earlier said that it was looking at 3 million tonne coal production this fiscal.
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Coal mining is integral to NTPC's fuel security strategy. It believes that greater self-reliance on coal will go a long way in ensuring sustained growth of generation.
In addition, the government has also allocated Kudanali- Luburi block jointly to NTPC and J&K, with NTPC's share of coal reserves in this block being two-thirds.
Similarly, Banhardih block, allocated earlier to Jharkhand Urja Utpadan Nigam, is now being assigned to Patratu Vidyut Utapadan Nigam (PVUNL), a JV company between NTPC and Jharkhand government.
From these 10 coal blocks, with a total estimated geological reserves of about 7.3 billion tonnes, NTPC expects to produce about 107 million metric tonnes of coal per annum.