MISG January 2007 Industry contact: - Alan Naismith SRK Consulting

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Presentation transcript:

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: anaismith@srk.co.za

MISG January 2007 What is pre-split blasting? Why is it important in surface mining?

MISG January 2007 Example of damage caused by blasting

MISG January 2007 How does a pre-split work?

MISG January 2007

MISG January 2007

MISG January 2007 But everything doesn’t always go to plan!

MISG January 2007

MISG January 2007

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?

MISG January 2007 Industry contact: - Alan Naismith SRK Consulting mobile: 083 267 7458 land line 011 441 1142 e-mail: anaismith@srk.co.za