Dhanbad, Dec. 11 -- A specialised team from the Central Mine Planning and Design Institute Limited (CMPDIL), Ranchi, on Thursday conducted a drone-based survey in the gas emission zone of Kenduadih, where underground leakage has continued for the ninth consecutive day, officials said.

The CMPDIL team, led by Bhuvnesh Gupta, deputy manager (geomatics), carried out thermal imaging and spatial mapping using high-resolution drones.

Gupta said that during winter, the normal surface temperature in the locality is around 22-23degC, which provides a baseline for comparison.

"The scientific assessment aims to map the spread, temperature variation, and potential causes of the persistent gas release. If any area shows a temperature significantly ...