Field note · 2026-05-16 · 4 min

The most expensive shot is the one you should not fire.

Hybrid mechanical and non-explosive work against live kilns, crushers and near-zero vibration budgets.

Some envelopes cannot take a blast. A reject crusher against a running mill. A preheater with a reclaim next door. A tank boxed in by an HT line. The vibration ceiling is the brief.

At Dalmia Rajgangpur we took a crusher down by hybrid: remote machines, diamond wire, non-explosive breaking. The adjacent lines stayed up. That is not a lesser job. It is a tighter one.

EPCs should put the vibration number in the NIT, not ‘controlled demolition’ as a vibe. We will answer with a method — hinge, implosion, sequence, or hybrid — and we will refuse a shot that cannot be drawn.

Brief the engineersAll notes

Further notes

A chimney does not miss by a little. It misses by a plant.

How a 135 m RCC stack at NTPC Kanti was hinged into a five-degree corridor, forty metres from a live ID fan.

Four hyperbolic shells. One outage window.

Why cooling towers are felled as a sequence, and how KTPS took eight — including four at once — inside an operating station.

How an EPC should prequalify a demolition subcontractor.

A practical PQQ: CIN, GST, PESO, own crews, owned plant, signed manhours, and a film of a job that looks like yours.

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