Vertical drilling also starts as part of ‘Plan B’SILKYARA: Personnel from Madras Sappers regiment of the Army’s Corps of Engineers were pressed into service on Sunday to clear the escape passage in the Silkyara tunnel where blades of the auger drilling machine had got lodged on Friday, halting the operation to rescue the 41 trapped workers inside.
Mahmood Ahmed, managing director,, said that “a drilling rig with the capability to reach depths of 90-95 meters will be utilised to accelerate the drilling process. We anticipate completing the vertical drilling within the next four days.”