Demarcated over an area of 26.69 sq.kms. with a reserve of 365 million tones. Mine-I is situated on the northern part of the field adjacent to the Neyveli Township. This mine has a production capacity of 10.5 million tones of lignite per annum and feeds lignite to the 600 MW capacity of First Thermal Power Station and 420MW Thermal Power Station I Expansion.
The lignite seam was first exposed in August 1961 and regular mining of lignite commenced in May 1962. German Excavation technology in opencast mining, using Bucket Wheel Excavators, Conveyors and Spreaders is used in this Mine for the first time in India. While overburden thickness varies from 50-95 metres, lignite thickness varies from 10 to 23 metres. The overburden to lignite ratio in this mine is 5.5 to 5 c.metre to one time (about 11 times of overburden is to be removed for mining one tonne of lignite).
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