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Electronic Detonators

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Presentation on theme: "Electronic Detonators"— Presentation transcript:

1 Electronic Detonators
Travel to al,ost zny mine site today and you will encounter the same types of technology that will change the fundamental way any industry will compete with in the next century. Global competition and increasing customer demands are forcing operators to seek out and adopt those technologies that

2 Differences Shock Tube Electric Shock Tube Electric Delay Module
Igniter Capacitor (Stored Energy) Delay Elements Igniter Base Charge Base Charge Pyrotechnic Delay Electronic Delay

3 Basic Application Concepts

4 Factory Programmed (Fixed) Delay Periods
DNAG - Dynamit Nobel (German System) Dyno Nobel - Ashai Chemicals

5 Fixed Delay Typically two wire Electric tie -in principles
Coded security Multiple delay periods Blast machine Sequential capability

6 Field Programmed (Variable) Delay Periods
Daveyfire - French / US EXEX - ORICA/DNAG Nitro Nobel - Dyno - Nobel ???

7 Variable Delay Two wire or multi-wired Digital / coded security
One millisecond interval delays Several seconds (maximum) Blast machine programming Hand-held programmers Blast design software options

8 Hand-Held Programmers

9 Fixed In-Hole Delay Interval Control
ALTECH - South Africa (Electronic Ezstoper type)

10 In-Hole Delay Five wire ribbon wire Blast machine & controllers
Series tie in Plug in connectors 32 second in hole delay Pre programmed surface controllers

11 Field Programmed Passive
SASOL - EZTronic

12 Passive Two wire Blast machine, computer,scanners Network tie in
Plug in connectors Bar code reader sequenced/programmed


14 Shock Tube Initiated Factory Programmed
17ms 17ms 17ms EBCO - DIGIDET

15 Shock Tube Shock Tube Leads Energy Transition Electronic Delay
Standard Tie In


17 Misfires Always wait 30 minutes
Use manufacturer's recommended procedures Electronic detonator systems vary in design & application

18 Always Follow manufacturer's warning & instructions, especially hook-up procedures & safety precautions Fire electronic detonators with equipment & procedures recommended by manufacturer

19 Always Verify detonator system integrity prior to initiation
Keep firing circuit insulated from ground or other conductors Use wires, connectors & coupling devices specified by manufacturer

20 Always Follow manufacturer's instructions when aborting blast
Clear blast area of personnel, vehicles & equipment prior to hooking up to firing device or blast controller

21 Always Keep detonator leads, coupling devices & connectors protected until ready to blast Keep wire ends, connectors & fittings clean & free from dirt or contamination prior to connection

22 Always Follow manufacturer's instructions for system hook-up
Follow manufacturer's recommended practices to protect electronic detonators from electromagnetic, RF or other electrical interference sources

23 Always Protect wires, connectors, coupling devices, shock tube or other components from mechanical abuse & damage Ensure blaster in charge has control over blast site throughout programming, system charging, firing & detonation

24 Always Use extreme care when programming delay times in field to ensure correct blast designs. Incorrect programming can result in misfires, flyrock, excessive airblast & vibration

25 Never Mix electronic detonators and electric detonators in the same blast even if made by same manufacturer, unless approved by the manufacturer

26 Never Mix electronic detonators of different types or versions even if made by same manufacturer, unless approved by manufacturer Mix or electronic detonators & equipment made by different manufacturers

27 Never Use test equipment & blasting machines designed for electric detonators with electronic detonators Use damaged or poorly maintained equipment or electronic detonators

28 Never Attempt to use blasting machines, testers or instruments with electronic detonators not specifically designed for system

29 Never Attempt to cut & splice leads unless recommended by manufacturer
Make final hook-up to firing device or blast controller until all personnel are clear

30 Never Load boreholes in open work near power lines unless firing lines & detonator wires are anchored or too short to reach power lines

31 Never Never handle or use electronic detonators during electrical storm - withdrawn personnel from blast area Use electronic detonator systems outside manufacturer's specified temperature & pressure ranges

32 Never Never program electronic detonator in booster, cartridge or other explosive component before loaded for final use Never hold electronic detonator while it is tested or programmed

33 Few people can say, “I was injured during an explosives accident”
1. As little as 250 milliamps can detonate a blasting cap

34 Respect power of explosives & detonators Handle with care
Keep wires shunted until wired into circuit Keep detonators away from stray current sources Only certified shotfirers permitted to perform blast duties 1. As little as 250 milliamps can detonate a blasting cap

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