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What Is Nonel ? Construction And Advantages
Of Nonel Blasting System (Shock Tube System)?
Explain NONEL Blasting Accessories In Opencast Mines?
NONEL
NONEL means non-electric detonator.
Generally Used for Deep Hole Blasting In Open Cast Mines.
It Consist of -
A flexible plastic tube has 3 mm external and 1.5 mm internal diameter In which 14-16 mg chemical mixture is filled per meter length and that helps to maintains the shock wave at a rate of approx. 2000m/sec for detonation of primers of Explosive in blast hole.
The tubes are available in pre-cut lengths of various different length.
One end of the tube is fitted with a non-electric delay detonator which is crimped to it in the factory.
While the other end is sealed.
The end having detonator is lowered down into the blast hole , while the sealed end projects outside the hole.
The sealed end is initiated by a detonator or detonating cord.
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