Hyderabad, Feb 26: The operation to rescue eight persons trapped in the partially-collapsed Srisailam Left Bank Canal (SLBC) tunnel in Telangana’s Nagarkurnool district made some progress on the fifth day on Wednesday as the rescue workers managed to reach the end of the 14-km long tunnel.

A team of rescue workers from different agencies finally succeeded in crossing the last 40-meter stretch and returned but there was no word about the fate of the eight persons.

Officials said the team saw the entire stretch filled with slush and debris. They would now decide how to go about the final phase of the operation.

Earlier, tunnel experts from the Border Security Force (BSF) were roped in as part of the efforts to reach the head portion of the Tunnel Boring Machine (TBM).

With slush impeding the further movement of the rescue teams, experts from various agencies have reportedly concluded that removing slush is the only way to complete the mission.

At a review meeting with Telangana ministers Uttam Kumar Reddy and Komatireddy Venkat Reddy, top officials of the agencies involved in the rescue mission informed that efforts were underway to remove the slush to reach the last 40 metres.

With this stretch filled with mud and debris and water seepage continuing, rescue workers had not made any headway for more than 24 hours.

A team of rat miners also went inside the tunnel and assessed the situation. Their representative told the media that the TBM was not seen and feared that it could be buried under the mud.

Rescue teams of the National Disaster Response Force (NDRF), the Army, the Navy and other agencies have not been able to advance further due to 7-9 metre high mud while the continuous seepage of water has made the entire operation risky for the rescue workers.

On a request from Telangana, the National Disaster Management Authority has requested the National Remote Sensing Centre and Geological Survey of India to conduct surface and sub-surface assessment of the incident site. This assessment is needed for the safety of the teams carrying out rescue operations.

Roping in experts from various agencies across the country and deployment of advanced equipment have not helped in what is believed to be the most difficult tunnel rescue operation in India.

Irrigation Minister A. Revanth Reddy and Roads and Buildings Minister Komatireddy Venkat Reddy on Wednesday held a meeting with officials of the various agencies involved in the rescue operation to assess the situation and discuss future course of action.

The ministers were informed that unless slush is removed and dewatering is done, rescue teams can’t make headway to reach the exact spot of the accident where the two engineers, two technical staff and four workers are trapped.

The accident occurred 14 km inside the tunnel. While the rescue teams had already reached 13.5 km, they could not advance further for the last two days due to mud, the debris of the Tunnel Boring Machine (TBM) and the seepage of water. The divers of the Navy’s special forces unit Marcos were unable to wade through the slush.

Rescue workers say more soil is falling from fresh cavities at the exact spot of the tunnel collapse, adding to mud. As the slush is more than 70 per cent, the Navy divers were unable to go through it.

With more than 100 hours after the accident, the chances of survival of the trapped men are stated to be remote.

The Border Road Organisation will also be joining the rescue operation on Wednesday. The operation involves the Army, the Navy, the SDRF, the National Highway Infrastructure Development Corporation, the Singareni Collieries Company Limited, L&T, and HYDRAA.

Disaster Management Special Chief Secretary Arvind Kumar continues to supervise the rescue operation with other top officials.

The tail unit of TBM was found 50 metres before the end of the 14 km long tunnel. The head portion of the tunnel has a safe container for workers to take shelter in emergency situations. It was not known if the trapped men could enter the container when the roof collapsed and seepage of water became intensive.

Meanwhile, Jaypee Group founder Jaiprakash Gaur visited the tunnel on Wednesday and said they were making their best efforts to rescue to trapped men. Jaypee is the contracting firm for the SLBC project.

Gaur said after completing the rescue operation, the company would resume the work to execute the project. He told media persons that they have encountered such incidents during tunnel works. He said this was the sixth or seventh accident in his life.

Hyderabad, Feb 26: The rescue operation continued for the fourth day on Wednesday to find eight people trapped in the Srisailam Left Bank Canal (SLBC) tunnel in Telangana’s Nagarkurnool district, with a last 40-metre stretch filled with mud and debris remaining an impediment for the rescue teams involved in the massive operation.

Rescue teams of the National Disaster Response Force (NDRF), Army, Navy and other agencies have not been able to advance further due to the 7-9 metre high mud mound while the continuous seepage of water has made the entire operation risky for the rescue workers.

Officials said unless the mud and debris are removed they can’t reach the front portion of Tunnel Boring Machine (TBM), where the eight persons were believed to be trapped since February 22 when the roof of the tunnel collapsed.

Roping in experts from various agencies across the country and deployment of advanced equipment have not helped in what is believed to be the most difficult tunnel rescue operation in India.

Chief Minister A. Revanth Reddy and Roads and Buildings Minister Komatireddy Venkat Reddy on Wednesday held a meeting with officials of various agencies involved in the rescue operation to assess the situation and discuss a future course of action.

The ministers were informed that unless slush is removed and dewatering is done, rescue teams can’t make headway to reach the exact spot of the accident where the two engineers, two technical staff and four workers are trapped.

The accident occurred 14 km inside the tunnel. While the rescue teams had already reached 13.5 km, they could not advance further for the last two days due to mud, debris of TBM and seepage of water. The divers of the Navy’s special forces unit Marcos were unable to wade through the slush.

Rescue workers say more soil is falling from fresh cavities at the exact spot of the tunnel collapse, adding to mud. As the slush is more than 70 per cent, the Navy divers were unable to go through it.

With more than 100 hours after the accident, the chances of survival of the trapped men are stated to be remote.

The Border Road Organisation will also be joining the rescue operation on Wednesday.

The operation involves Army, Navy, SDRF, National Highway Infrastructure Development Corporation, Singareni Collieries Company Limited, L&T and HYDRAA.

Authorities have roped in experts from the Geological Survey of India (GSI), National Geographical Research Institute (NGRI), and the National Remote Sensing Agency (NRSA) to assess the situation and suggest the way forward for rescue operations.

Disaster Management Special Chief Secretary Arvind Kumar continues to supervise the rescue operation with other top officials.

The TBM is believed to have broken into two after a portion of the tunnel roof collapsed on the morning of February 22.

The tail unit of the TBM was found 50 metres before the end of the 14 km-long-tunnel. The head portion of the tunnel has a safe container for workers to take shelter in an emergency situation. It was not known if the trapped men could enter the container when the roof collapsed and seepage of water became intensive.

Meanwhile, Jaypee Group founder Jaiprakash Gaur visited the tunnel on Wednesday and said they were making best efforts to rescue the trapped men. Jaypee is the contracting firm for the SLBC project.

Jaiprakash Gaur said after completing the rescue operation the company would resume the work to execute the project.

Hyderabad, Feb 25: Rescue teams involved in the intensive operation to pull out eight persons trapped in an under-construction tunnel which collapsed in Telangana’s Nagarkurnool district for three days are re-drawing the strategy to move forward in the last stretch of 40-50 metres.

Facing several hurdles, the authorities have roped in experts from the Geological Survey of India (GSI), the National Geographical Research Institute (NGRI), and the National Remote Sensing Agency (NRSA) to assess the situation and suggest the way forward for rescue operations.

Multiple teams of the National Disaster Response Force (NDRF), Army, Larsen and Toubro (L&T) and various agencies are moving cautiously as the stability of the tunnel has to be taken into consideration while undertaking any excavation work.

While continuing dewatering, the rescue teams were waiting for the experts to suggest the next step.

Various agencies including the Army, Navy, SDRF, National Highway Infrastructure Development Corporation, and Singareni Collieries Company Limited have mapped out the tunnel operation. They prepared a detailed diagram to help prepare a rescue strategy to locate and reach eight trapped men.

Officials said the conveyor belt used to bring back debris from the tunnel after excavation was not working.

Minister for Roads and Buildings Komatireddy Venkat Reddy said the efforts were on to repair the belt.

Deployment of advanced equipment like endoscopic and robotic cameras to trace the trapped men has not yielded results. According to officials, the robotic camera is not working.

Tunnel Boring Machine (TBM) broke into two after a portion of the tunnel roof collapsed on the morning of February 22.

The tail unit of TBM was found 50 metres before the end of the 14 km long tunnel. The head portion of the tunnel has a safe container for workers to take shelter in an emergency. It was not known if the trapped men could enter the container when the roof collapsed and water seepage became intensive.

The drone was also not accessible after the TBM tail unit. The 50-metre area is filled with sediments and debris hampering further movement of the rescue teams for the last 24 hours.

The tunnel map prepared by the rescue teams shows that the loco track is accessible up to 12 km though the track is available for a length of 13.5 km.

There is no water stagnation in the tunnel till 10.7 km point. The teams found 1.5 feet water at 10.95 km There is 2 to 2.5 feet water at 11.30 km.

The NDRF team has also deployed a trained sniffer dog for the rescue operation but the same could not be pressed into service due to slush.

A team of expert rat miners, known for a successful rescue operation in the Silkyara Bend-Barkot tunnel in Uttarakhand in 2023, has arrived, but their services have not yet been used. In Uttarakhand, the team rescued 41 workers who were trapped inside the tunnel for 17 days.

The team members, however, said that the situation in Telangana is different. In the Uttarakhand tunnel, it was rock and they used hand tools to reach trapped workers through small pits. However, the SLBC tunnel is filled with water and mud.

Deputy Chief Minister Mallu Bhatti Vikramarka, Irrigation Minister Uttam Kumar Reddy, Roads and Buildings Minister Komatireddy Venkat Reddy and Tourism Minister Jupally visited the tunnel and reviewed the rescue operations with various agencies.

Uttam Kumar Reddy said he invited Harpal Singh, former engineer-in-chief of Border Road Organisation to share his expertise and knowledge for the rescue operation. The minister quoted Harpal Singh as saying he had never seen such a complicated tunnel accident.

Two workers were injured and eight others were trapped when a portion of the tunnel being dug as part of SLBC collapsed near Domalapenta.

A total of 50 persons were working on the left-side tunnel when the roof collapsed for three metres. The accident occurred at the 14th km point.

While 42 workers came out of the tunnel, the remaining eight were trapped. Those trapped include two engineers and two machine operators.

The trapped men are from Jharkhand, Uttar Pradesh, Punjab and Jammu and Kashmir.

Project manager Manoj Kumar (Uttar Pradesh), Machine engineer Srinivas (Uttar Pradesh) and machine operators Sunny Singh (J&K) and Gurpreet Singh (Punjab) are among those trapped.

The four workers from Jharkhand are Sandeep Sahu, Santosh Sahu, Anju Sahu and Jagta Khes.