His father Kiran Shankar Roy was from the former Zamindar of Teota Village of Shivalaya Upazila, Manikganj District in the Dacca Division of United Bengal before India's independence.
Kiran Shankar Roy was a freedom fighter, Congress leader and former Home Minister of West Bengal immediately after India's independence.
After 7 years in 1953, according to the Lok Sabha speech of Deputy labour Minister Abid Ali, then in India 4 Trade Unions: INTUC, AITUC, HMS and UTUC had a major influence on the workers.
[4][5] At that time, Colliery Mazdoor Sabha and Indian Mine Workers Federation led by AITUC leader Kalyan Roy, had a stronghold in India's oldest coal belt in Raniganj area.
The conferences of the iMWF at Bhurkunda and inmwf at Dhanbad have raised the slogans of: Nationalisation of Mines, Wage Board for Coal Industry, Abolition of Contract labour; Gratuity and change in the present Bonus Act.
The coal miners across the country faced the worst workable conditions led to the Chasnala mining disaster on 27 December 1975.