1600 kg explosives required for demolishing Maradu flats

Joseph Mathew

Kochi: Only two months are left for the demolition of five towers of the four apartment complexes built in Maradu here violating the Coastal Regulation Zone (CRZ) Act. A total of 1600 kg explosives are required to demolis the buildings through controlled explosion. Emulsion explosives with ammonium nitrate as major ingredient will be used.

The technical committee appointed by the government opined that all four flats should be demolished on a single day. However, the Petroleum and Explosives Safety Organisation (PESO) opposed this move as it could be an adventurous move and demanded that the explosion should be conducted in three days.

Indore-based demolition expert Sarad B. Sarwate also had the same opinion. Following this, the explosion was scheduled for two days. As January 11 and 12 are Saturday and Sunday, the demolition was fixed for these days.

Demolition method

  • Holes will be made in all pillars in ground floor, first, fifth, ninth and 12th floors.
  • Explosives and detonating fuse will be filled in the holes and then the holes will be connected.
  • All circuits will be connected with two electronic detonators so that if one attempt fails, another can be initiated.
  • Lastly, the exploder which carries electricity will be connected at least 100 meters away.
  • After this, explosion will happen by pressing one single switch.
Only 12 seconds

The explosion takes just six seconds to start. Once it starts bursting, the entire building will completely collapse in six seconds. Each explosion will take place in the difference of milliseconds. This is to avoid the remnants falling down at a time. It is assumed that the explosions in two places will be in a gap of 3 hours, but is not finalised.

Amount of explosives required for each building

  • Jain Coral Cove - 700 kg (approximately 2732 holes)
  • Holyfaith H2O – 400 kg (1414 holes)
  • Golden Kayaloram – 200 kg (number of holes not decided as design was not submitted)
  • Alpha Serene – 300 kg (4500 holes)
About 76,350 kg of concrete waste is expected to be formed after the explosions


Evicting people dwelling within 200 metre area is a major challenge. Earlier, the government had calculated that there are 9522 buildings within one km area. The number of people to be evicted from 200 metres area is not available.

Another challenge is stopping the traffic on national highway and Kundannoor-Thevara road at the time of explosion.

Collecting explosives

The explosives can be bought from Kochi. They have to be brought in special vehicles. Everyone involved in the deal will have license. The companies need to obtain No Objection Certificate (NOC) from the collector. After this, PESO will grant permission for the explosion.

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