The rescue operation inside the partially collapsed SLBC tunnel was underway at a rapid pace on the 11th day of the accident on Tuesday and officials are confident that the damaged conveyor belt would be operational during the day. There was no breakthrough in the efforts to locate the eight trapped persons and rescuers are working in three shifts every day, an official told PTI. The process of removing debris and dewatering was going on, he said. The conveyor belt which suffered damage following the accident is expected to be operational today, he said. The belt would be useful in shifting the muck and other debris out of the tunnel with ease. A police official on Monday evening said the state government is exploring the option of deploying robots in the rescue operation to prevent any threat to the rescue personnel. Large quantities of slush and water inside the tunnel posed a challenge to the teams involved in the rescue operation. Eight persons -- engineers and labourers -- ha