Blasting Masterclass
30 September 2014
Portal Design: Managing energy in a developing
metropolis
Wealth
Unearthed
Scope of Presentation
• Ho Man Tin (HOM) Project location – Portal cross cut station in
Hong Kong
• Project Organogram
• B...
MTRC
(Mass Transit Railway Corporation)
ARUP (consulting)
Nishimatsu Construction
Company
AECOM (consulting)
Archie Mining...
HOM Bench Blasting History Dimensions Max Min Avg
Burden 1.3 m
Spacing 1.3 m
Pattern Square& Staggered
Diameter 51 mm
Smar...
VB1 77.4m
VB2 76.3m
VB3 99.4m
VB4 138.3m
VB5 113.2mVB6 118.9m
VB7 103.5m
VB8 44.7m
VB9 54.1m
VB10 123.6m
VB10A 163.6m
VB11...
Top view
VB8
Side view
0
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9
PPV(mm/s)
9 Blast sample points
Shock Tube vs SmartShot™ on VB8
44.7 m from center o...
0
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7 8 9
MIC(kg)
9 Blast sample points
Shock Tube vs SmartShot™
44.7 m from center of blast
MIC...
0
1
2
3
4
5
6
7
8
9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Drilldepthachieved(m)
Double deck blasts
D...
0
5
10
15
20
25
30
0
20
40
60
80
100
120
140
160
1
5
9
13
17
21
25
29
33
37
41
45
49
53
57
61
65
69
73
77
81
85
89
93
97
1...
Time lapse of daily operations
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
1
5
9
13
17
21
25
29
33
37
41
45
49
53
57
61
65
69
73
77
81
85
89
...
Blast volume comparison over 10 months
2012
Shock Tube
Blasts
Shock Tube
m3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
June...
Relax, we have everything under control….
Acknowledgements
Control of environmental impact achieved.Product confidence attained by all parties concerned.
Conclusion
Thank You
Correc...
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
Portal Design: Managing energy in a developing metropolis - Ashlin
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Portal Design: Managing energy in a developing metropolis - Ashlin

Blasting Masterclass 30 September 2014
Published on: Mar 4, 2016
Published in: Engineering      
Source: www.slideshare.net


Transcripts - Portal Design: Managing energy in a developing metropolis - Ashlin

  • 1. Blasting Masterclass 30 September 2014 Portal Design: Managing energy in a developing metropolis Wealth Unearthed
  • 2. Scope of Presentation • Ho Man Tin (HOM) Project location – Portal cross cut station in Hong Kong • Project Organogram • Blasting Requirements and design • Comparisons of different initiating systems and the outcomes • Conclusion
  • 3. MTRC (Mass Transit Railway Corporation) ARUP (consulting) Nishimatsu Construction Company AECOM (consulting) Archie Mining Services (AMS) Mines Division Project Organogram How does AEL fit into this?
  • 4. HOM Bench Blasting History Dimensions Max Min Avg Burden 1.3 m Spacing 1.3 m Pattern Square& Staggered Diameter 51 mm SmartShot™ detonators blasted 260 27 104 Holes blasted 128 25 75 Rows per blast 10 2 7 Holes / row 21 5 12 Bench height 8.0 2.5 4.8 Powder factor kg/m3 0.450 0.240 0.345 Bench area m2 520 41 143 Bench volume m3 1725 164 596 Blast design Managing energy to execute effective blasting
  • 5. VB1 77.4m VB2 76.3m VB3 99.4m VB4 138.3m VB5 113.2mVB6 118.9m VB7 103.5m VB8 44.7m VB9 54.1m VB10 123.6m VB10A 163.6m VB11 65.5m VB12 54.3m VB13 95.4m VB14 74.6m VB15 83.9m VB16 130.5m VB17 113.5m VB18 142.6m VB19 66.9m VB20 153.3m VB21 202.9m VB22 133.5m VB23 86.9m VB24 139.7m VB25 160.1m VB26 105.3m VB27 73.6m VB28 128.1m VB29 170m Cavern1 135.9m Shaft 248m HOM box-cut:29 Vibration monitoring stations Monitor locations for the HOM cross cut Portal • 29 Monitoring stations • Minimum of 6 recorders on during any blast • IS – Shock Tube • EIS – SmartShot™ combined with ViewShot™
  • 6. Top view VB8 Side view
  • 7. 0 10 20 30 40 50 60 1 2 3 4 5 6 7 8 9 PPV(mm/s) 9 Blast sample points Shock Tube vs SmartShot™ on VB8 44.7 m from center of blast Shock Tube SmartShot™ PPV Limit Vibration level comparison between the two initiating systems
  • 8. 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 MIC(kg) 9 Blast sample points Shock Tube vs SmartShot™ 44.7 m from center of blast MIC Used (Shocktube) MIC Allowed (Shocktube) MIC used (SS) MIC allowed (SS) Maximum Instantaneous Charge Energy controlled with accuracy
  • 9. 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Drilldepthachieved(m) Double deck blasts Double deck – Shock Tube vs SmartShot™ Shocktube achieved depth SmartShot™ achieved depth Product m Shock Tube average depth 4.79 SmartShot™ average depth 6.93 Average advance gained with electronics 2.15 Benefits of Multiple Decks Accurate control of energy delivered the advance
  • 10. 0 5 10 15 20 25 30 0 20 40 60 80 100 120 140 160 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101 105 109 113 117 121 125 129 133 137 141 145 149 AOP(dBL) Number of blasts Blast log of AOP control PPV vs AOP AOP PPV Single layer rubber mat BL45 Double layer rubber mat BL108 Air Overpressure Control Attenuating energies in confined spaces
  • 11. Time lapse of daily operations
  • 12. 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101 105 109 113 117 121 125 129 133 137 141 145 149 Holesperblast Number of blasts Increase in blast hole numbers No of Holes PPV AOP Linear (No of Holes ) Single layer rubber mat BL45 Double layer rubber mat BL108 Shock Tube SmartShot™ Pattern size increase Expanding exploration with controlled energy
  • 13. Blast volume comparison over 10 months 2012 Shock Tube Blasts Shock Tube m3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 June 3 651 245 203 203 July 1 203 203 Aug 3 1088 375 341 372 Sept 5 1379 216 372 372 210 210 Oct 9 3045 372 372 210 372 233 372 372 372 372 Nov 7 2222 372 338 278 339 278 278 339 Dec 5 1724 278 365 372 338 372 Jan 5 2082 372 372 446 446 446 Feb 5 1822 372 372 372 372 335 March 1 372 372 Total 44 14588 2013 SmartShot™ Blasts SmartShot™ m3 March 7 2737 339 339 345 345 355 406 608 April 14 7444 521 595 804 597 434 741 564 408 347 446 651 333 515 488 May 17 7401 409 449 164 490 389 271 787 575 513 330 484 415 409 566 217 446 487 June 14 9365 507 227 563 939 636 930 803 370 902 747 982 268 520 971 July 13 9418 862 692 578 804 905 924 572 741 702 446 730 416 1046 August 12 6606 469 789 541 433 654 461 495 491 283 787 436 766 Sept 12 9114 559 805 486 956 781 953 924 186 686 1088 952 739 Oct 12 8464 632 686 766 745 405 827 672 851 749 712 1045 374 Nov 11 12000 1059 938 489 672 562 580 1430 1413 1725 1656 1476 Dec 5 4252 1625 664 1036 326 601 Total 117 76801 Shock Tube vs SmartShot™ 426 % increase in material extraction with electronics • Zero misfires recorded • Zero Flyrock
  • 14. Relax, we have everything under control….
  • 15. Acknowledgements
  • 16. Control of environmental impact achieved.Product confidence attained by all parties concerned. Conclusion Thank You Correct product understanding, planning and application is proving to deliver boundless possibilities. Investigations into three or more decks should be done for future use of EIS.

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