A senior advocate, who is assisting the tribunal as an amicus curiae in the mining matter, said a report of a high-level committee was submitted on January 2 before a bench headed by NGT chairperson A K Goel.
The report stated that majority of the mines in the state were operating without a lease or licence.
At least 15 miners are trapped in the 370 foot-deep illegal coal mine in Lumthari village of East Jaintia Hills district of Meghalaya since December 13 and all efforts to pump the water out of flooded mine have been in vain.
The state government has spent roughly over Rs 50 lakh for hiring various utilities to rescue the trapped miners.
On Thursday, the Supreme Court had expressed strong dissatisfaction over the rescue efforts to trace the miners and had asked the state government to bring them out dead or alive.