misg january 2007 rock mass damage associated with pre-split blasting in surface mining

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MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

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MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining. MISG January 2007. Industry contact: - Alan Naismith SRK Consulting mobile: 083 267 7458 land line 011 441 1142 e-mail: [email protected]. MISG January 2007. What is pre-split blasting? - PowerPoint PPT Presentation

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Page 1: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Rock mass damage associated with

pre-split blasting in surface mining

Page 2: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Industry contact: -Alan NaismithSRK Consultingmobile: 083 267 7458land line 011 441 1142e-mail: [email protected]

Page 3: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

What is pre-split blasting?

Why is it important in surface mining?

Page 4: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

Page 5: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Example of damage caused by blasting

Page 6: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

How does a pre-split work?

Page 7: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

Page 8: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

Page 9: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

Page 10: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Page 11: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Page 12: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

But everything doesn’t always go to plan!

Page 13: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Page 14: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Page 15: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

RESEARCH QUESTIONS:- What dynamic forces are created near to the

mouth of the hole that could lead to “anomolous” fracture patterns?

What must be done to modify these forces and minimise or eliminate these “anomolous” fracture patterns?

Page 16: MISG January 2007 Rock mass damage associated with pre-split blasting in surface mining

MISG January 2007

Industry contact: -Alan NaismithSRK Consultingmobile: 083 267 7458land line 011 441 1142e-mail: [email protected]

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