Q. Which coal PSU has become the first in India to adopt Paste Fill Technology in underground mining?
Answer: South Eastern Coalfields Limited (SECL)
Notes: South Eastern Coalfields Limited (SECL) has become the first coal Public Sector Undertaking (PSU) in India to adopt Paste Fill Technology in underground mining. Paste Fill Technology is a modern method used in underground mining to fill the empty spaces left after coal extraction. The paste used is made by mixing crushed overburden from opencast mines, fly ash, cement, water, and binding chemicals. This technique eliminates the need for acquiring additional surface land. It also helps prevent land subsidence, making mining operations more environmentally friendly and safe.

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