can trapped tunnel workers be saved?

Yes, trapped tunnel workers can indeed be saved, even after extended periods. In the Trishuli-3A tunnel incident, rescue teams successfully pulled out two workers alive after they were trapped for 10 suffocating days beneath massive mud, boulders, and floodwaters. Survival experts noted that workers can stay alive if air pockets remain intact inside the tunnel and dehydration levels do not exceed 20 percent. Despite rescuers facing immense challenges and clearing tons of debris over days and nights, hearing human voices inside led to a miraculous and successful rescue.