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Extraco / Nonel tunnel

Nonel tunnel

Nonel tunnel is a non-electric initiation system intended for use in tunnel and underground blasting works. It consists of a series of NPED (i.e. Non-Primary Explosives Detonator) with suitable Length of Nonel tube. All detonators have individual delay. The strength of each detonator is that of a No.8 plain detonator.

Nonel tunnel detonators are best initiated by means of bunch connectors or detonating cord. A bunch connector consists of a loop of detonating cord incorporated in surface connector (usually zero delay). A bunch connector is designed for the reliable initiation of a maximum 20 Nonel-tubes.

Description

Application

The Nonel tunnel initiation system has been developed for tunnel and underground blasting operations. The delay times between successive intervals are long enough to enable rock to be broken and displaced properly from the tunnel face before subsequent holes detonate.

Packaging

To be easily identified against other Nonel detonators as well as rock in poor lighting conditions, the Nonel tunnel detonators are fitted with red Nonel-tubes. Interval and delay times are given in the next table.

Nonel tunnel
tube length(m) packing Qty/box
4.0 100
5.0 100
6.0 100
8.0 80
10.0 60
Period number Delay time (ms) Delay interval(ms)
0 max 10
1 100 75
2 200 100
3 300 100
4 400 100
5 500 100
6 600 100
7 700 100
8 800 100
9 900 100
10 1000 100
12 1200 200
14 1400 200
16 1600 200
18 1800 200
20 2000 200
25 2500 500
30 3000 500
35 3500 500
40 4000 500
45 4500 500
50 5000 500
55 5500 500
60 6000 500
65 6500 500
70 7000 500

 

Nonel Bunch Connectors
tube length (m)

 

packing Qty/box

 

3.6 100
4.8 90
6.0 80
7.8 70
9.0 60
10.2 50

Storage

Nonel detonators should be handled,stored and used according to the national laws and regulations. They are packed in bags for protection against moisture. Storage temperature below +50°C is highly recommended.

Provided that storage conditions are appropriate, it is recommended to use Nonel detonators within 12 months.

Product shelf life expansion can be verified after examined by the supplier.

Classification

Commercial Name: Nonel tunnel

Technical Name: Detonator assemblies, non-electric

UN-number: 0361,0500

Division/Compatibility Group: 1.4B, (1.4S at request)

Additional information

In-hole detonator

In-hole detonator

Type

NPED

Explosive content

1 gr. (PETN/RDX)

Shell material

Aluminum

Shell Diameter

7.5 mm

Shell Length

60-93 mm, depending on the delay time and the composition

Tube

Tube

Tube type

Nonel tube 3L

Diameter

3 mm