When disaster strikes, whether a building collapse or an earthquake, the immense pile of concrete and steel becomes the primary obstacle between life and death. For rescue teams, extricating victims from mountains of debris is a race against time. At a rescue site, operations shift systematically from initial scene stability assessments and surface rescues to deeper cavity searches. Rescuers employ an array of high-tech equipment, including life detectors, boremeters, specialized cameras, and magnetic microphones, alongside sledgehammers. Trained K-9 squads remain indispensable as always.
Structured Multi-Phase Blueprint
The Times of India spoke with officials from disaster response agencies such as the National Disaster Response Force (NDRF). They explained the finer points of a high-stakes operation where nothing is left to chance. Some criticism has emerged regarding the pace of rescue at the Saidulajab building collapse site. An official present there stated that every move is a calculated, strategic decision. "It may seem slow-paced at first glance, but we follow a highly structured, multi-phase blueprint to locate the victims," the official said.
The operation begins with reconnaissance to evaluate scene stability, followed by rescue of survivors who are easily visible or audible, according to a senior NDRF officer. After that, responders focus on a complex cavity search mission, looking for signs of life under collapsed beams or stairs. Cutting and drilling through these sensitive spots is challenging.
Simultaneous Tasks and Heavy Machinery
Rescue efforts do not focus on a single job at any one moment; different tasks proceed in sync. For instance, while the cavity search is ongoing, other rescuers remove debris from pockets marked "clear" by a supervisory officer. Heavy machinery such as cranes is used to break down larger structural pieces and remove them. "Before lifting any concrete slab, we use special cameras and equipment to inspect underneath and confirm that there are no survivors there," said an NDRF commandant.
Behind the scenes, police, fire officials, ambulance services, and hospitals are kept informed about missing persons. Only after the last missing person is accounted for does the final phase of general debris clearance commence.
Primary Tools and Advanced Equipment
Interestingly, basic manual implements like sledgehammers, pry bars, and steel pipes are the primary tools for surface or small debris removal, as the rescuer remains in control of the environment while using them, said a rescuer involved in the Saidulajab operation. For breaching obstacles, the team deploys an angle cutter to slice through concrete and metal. A portable air plasma cutting machine with a lightweight, non-breakable air cutting torch is also used.
For deeper structural exploration, responders use core drills and concrete cutters to pierce through thick slabs, creating channels to insert equipment like the life detector—a magnetic microphone that catches acoustic disturbances. "The life detector senses survivors by identifying distinctive electromagnetic signals generated by a human heartbeat," an NDRF officer explained.
Rescuers also use a borescope equipped with a camera, allowing them to peer deep into the wreckage. This device can be inserted into debris through small holes so teams can see the interior on a monitor, the officer added.
Lifting Tools and K-9 Squads
The teams rely on lifting tools capable of handling loads ranging from 1 tonne to 70 tonnes, as well as versatile airlifting bags to lift concrete. These bags are effective on uneven ground where standard jacks are unstable. The moment a device captures a sign of life—a mild groan or a faint tap—two-way communication devices are lowered into that space.
Of course, there are the dogs. The K-9 squad is a trained and vital asset. The dogs' acute sense of smell proves that even in a high-tech battle against time, a trained canine is irreplaceable. At Saidulajab, rescue personnel used four dogs on Saturday and Sunday.
