Electronic Initiation in Underground Development. D. Scott Scovira NA Group Manager Advanced Mining Solutions Orica USA, Inc.

Transcription

1 Electronic Initiation in Underground Development D. Scott Scovira NA Group Manager Advanced Mining Solutions Orica USA, Inc. Society of Mining Engineers Denver 2009

2 Quick History of Blast Initiation Cap and Fuse

3 Quick History of Blast Initiation Electric Detonators

4 Quick History of Blast Initiation Non-Electric Detonators

5 Conventional LP Non-Electric Initiation

6 Double-Ended Non-Electric Detonators

7 Non-Electric Face Round

8 Quick History of Blast Initiation Electronic Initiation

9 Popcorn vs. the Hammer

10 Electronic Blasting Systems (EBS) are the Enabling Technology for Improving Upon Existing Mining Applications or Developing Entirely New Ones Drawpoint Development in Block Caving Operations Underground Mass Blasts Critical and Specialty Blasts in UG Civil Construction Heading Development and Shaft Sinking

11 Electronic Blasting System Characteristics Programmability: Selection of unique delay times with millisecond accuracy. Optimization of delay times that are best suited to site specific conditions and to desired results. Reduces inventory as there is no need for stocks of many different delay times.

12 Drawbell Development in Block Cave Mines

13 Drawbell Development in Block Cave Mines

14 UG Mass Blasting Modeling Tools are Used Extensively to Deliver Positive Outcomes

15 Global Record UG EBS Blast 24 Oct 2008 GoldCorp Dome Mine in Timmins, Canada > 2,975 Electronic Detonators. > 19 Loggers Fired as 1 st Synchronized UG Blast in NA. > 100,000 kg Bulk Emulsion. > 300,000 tonnes Gold Ore. > Hardly a Trace of Vibration or Air OP.

16 Critical Blasts in UG Civil Construction

17 Critical Blasts in UG Civil Construction

18 Civil Tunneling

19 New EBS for UG Development edev Electronic Blasting System Three Component Electronic Blasting System - edev Detonator - edev Scanner Scanner - edev Blast Box Electronic Detonator Blast Box

20 New EBS for UG Development edev Electronic Detonator - High Strength Detonator 10,001 Delay Times in 1 Millisecond Increments - Self Contained Connector with Grease - Flag Tag and Bar Code Identifier - Robust Steel Wire

21 New EBS for UG Development edev Scanner - Hand Held Portable Device - Used to Scan Detonators -Assigns Detonators Delay Numbers - Delay Table with Specified Times that is Not Visible on Screen During Scanning Operation >>> Delay Times are Customized to Site Specific Blasting Needs

22 New EBS for UG Development edev Blast Box - Four Button Operation - Large Screen - 16 lines of text - Easy to Use - Bluetooth Connection with edev Scanner for Data Transfer

23 New EBS for UG Development - Input Specified Tunnel or Heading Perimeters - Design Blasthole Layouts, Angles, and Bearings - Design, Simulate, and Optimise Initiation Designs - Download Detonator Delay Template to Scanner - Print Blast Layout and Initiation Designs

24 edev Detonator Delay Table Delay Number (#): > What the miner sees on the scanner screen. Delay Gap: > The time between different delay periods. Delay Offset: > The amount of time between delays within the same period. > Manage the number of holes firing at the exact same time. > Does not have to be used if not desired. Delay # Delay Gap Delay Offset

25 edev - Delay by Numbers Burn Cut Design with edev Timing Rules # ms

26 edev - Delay by Numbers Design Using edev Timing Rules a Possible Firing Sequence

27 edev at the Face

28 edev at the Face - The Miner can Scan Detonators in any Order Using the Preconfigured Delay Table - Only the Delay # is Displayed on the Scanner

29 edev at the Face

30 edev at the Face

31 edev at the Face

32 edev at the Face

33 edev at the Face

34 edev at the Face

35 edev at the Face

36 Unlocking Competitive Advantage On the Output Side The Potential of Explosives Leveraging explosives technology is a key to gaining both competitive advantage and improved bottom line performance. Budget Design $ Advance Spend per vs. Unit Time of Advance Actual $ Advance Spend per vs. Unit Time of Advance Explosives need to be viewed NOT just as an input. Efficiency, Effectiveness, Safety, Sustainability

37 Reduction in Tights and High Bottom

38 Complete Pull Per Round

39 Reduced Perimeter Overbreak Less Scaling $, Less Mucking $, Less Bolting $, Less Mesh $, Less Shotcrete $, Less Concrete $$ = Less Total $ per Unit of Advance

40 Short Term Blast Vibration Mgt Near Critical Structures EBS Offset Timing Replaces Need for Segmented Non-Electric Sequences

41 Long Term Blast Vibration Mgt

42 Shaft Sinking 21 st Century Replacement for Toroid Detonators (MagnaDets)

43 Closing Words