Detonating Cord

Detonating cords are mainly used in initiation of the cap sensitive explosives, surface connection of the nonelectronic detonators, and in special applications like presplitting or smooth blasting. It is a flexible cord containing a core of highly sensitive PETN (Pentaeryhtrol tetranitrate) explosive which is covered with textile and waterproof PVC layers. When initiated it detonates with a speed of around 6300-7000 m/sn. Velocity of detonation increases with the amount of explosive at the core. Depending on the field of use detonating cords are classified according to amount of PETN for each meter (5 gr/m – 80 gr/m). Usually 10 gr/m detonating cords
are used for initiating the cap sensitive explosives.

MSDS TDS
 

Useful Features

  • The protective layer around the cord protects it against all adverse physical conditions which might be encountered in a blasting environ ment, provides excellent tensile strength, protection against stretching, friction, water, oil and extreme temperatures.
  • Detonating cords provides safe working environment in weather conditions under which it might be dangerous to use electrical detonators.
  • Not affected from static electricity, not sensitive to friction and impacts.
  • It is a suitable choice for multiple priming along charge column in large diameter and deep blastholes.
  • Infinite number of delay times can be applied using special surface relay elements.

Initiation

Detonating cords should not be transported together with the detonators. If to be used directly for initiating the primer, one end should be inserted into the primer and the chord should be wrapped and tied around the primer. Always cut the detonating cord with a sharp knife. Never attempt to cut the cord with a blow from a hard object such as a spade, axe and stone. The core of the explosive inside the cord is sensitive to impact and friction and it may explode when struck between two hard surfaces.Cord should not be cut using tools with metal to metal contact such as scissors or wire cutters. Open end of the cord should be protected from water and oil and any connection should be made at least 15 cm away from the open end. Ensure that they are no loops, kinks and severe bends in the cord which can cause gaps in the explosive core and lead to misfires. While connecting a detonator to a cord it should be firmly in contact with the cord and explosive end of the detonator should be in the direction of propagation. Cord lines should not be overlapped or crossed over each other, all connection points should be at wide angles; acute angles may
cause misfires. Ensure every blasthole has two paths of initiation, this prevents cutoffs due to ground movements of flying rocks.

Packing and Product Dimensions

Detonating cords are coiled in spools at different lenghts according to their diameters and put into cardboard boxes.

 

Technical Specifications

Core Load Tensile Strength Outer Diameter Cord Color
5 g/m 50 kg 3.6 mm Beyaz
10 g/m 50 kg 4.4 mm Mavi
40 g/m 60 kg 8.0 mm Mavi
80 g/m 60 kg 11.0 mm Mavi
 

Storage

Should be stored according to regulations (87/12028) in well ventilated dry magazines and should not be subjected to direct sunlight.

Transportation

UN Name: Nonelectric Detonator
UN No: 0065 Type B
IMDG: 1.1 D
Surface Mine, Quarry and Construction Blasting - Cords other headings in the category
Detonating Cord
Plain Detonator Safety Fuse System