detonators

A detonator is a device used to initiate a high explosive by producing a shock that detaches or detonates a booster charge, which in turn initiates the main explosive in a controlled sequence. Detonators are a key part of an initiating system that also includes boosters and the main charge. They are designed to be reliable, safe to handle in guarded environments, and compatible with the specific explosive system they are paired with.

Types and principles. Electric detonators rely on an electric signal to ignite a sensitive primary explosive inside the device, which then detonates a booster charge. Non-electric detonators provide initiation without a direct electrical signal, using mechanical means or a shock-tube delay system to achieve the same result. Time-delay detonators are designed to delay the initiation of the main charge, allowing precise sequencing in complex blasting patterns. In practice, detonators are paired with a booster and connected to a central firing system or distributed ignition network.

Applications. Detonators are used in mining, quarrying, construction demolition, and other large-scale blasting operations to initiate charges safely and efficiently. They are also employed in specialized military, aerospace, and ordnance disposal contexts under tightly controlled conditions. The choice of detonator type depends on the explosive system, required timing, and safety considerations.

Safety and regulation. Detonators are hazardous devices that are subject to strict handling, storage, transport, and usage regulations. They must be used only by trained personnel following approved procedures, with appropriate licenses and safeguards to prevent accidental initiation and accidental detonation.