Blasting in Mining - New Trends by Ajoy K. Ghose, Akhilesh Joshi

By Ajoy K. Ghose, Akhilesh Joshi

Blasting practices in mines have passed through many adjustments within the contemporary earlier and remain honed and reconfigured to fulfill the calls for of today’s mining wishes. This quantity compiles papers of the workshop Blasting in Mines – New Trends, hosted through the Fragblast 10 Symposium . The 17 papers offer a combination which spotlight the evolving traits in blasting in mines. those diversity from specific strategies of forged blasting, purposes of seed wave modelling for more desirable fragmentation, to layout of mass blasts and regulated blasting for balance of pit-walls. Blasting in Mines – New Trends could be of specific curiosity to mining and blasting engineers.

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2005. Application of advanced blasting technologies for large scale de-stress blasts at Brunswick Mine, CIM Bulletin, June/July 2005, Montreal, Canada. D. & Roberge, S. 2007. “Application of mass-blast principle for stope blasting in deep mines”, Chapter 7, Challenges in deep and high stress mining, Y. R. Tracey and J. Hadjigeorgiou, 2007 Australian Centre for Geomechanics, Perth, Australia. REFERENCES Liu, Q. & Ellis, B. 2001 “Improvement of Blasting Productivity at Brunswick Mine” Proceedings of Explo2001, Hunter Valley, NSW, Australia Oct.

Commonly, the assessment of blast vibrations and induced dynamic strains varies according to the blast designers’ knowledge or depends on the rules set by the various institutions. In most cases, the calculation of quantities (such as the charge of explosives per round and the various distance relationships which are or are not based on more or less confirmed statistical estimation methods) rests on statistically unconfirmed methods which are not universally applicable. These methods must be generally valid and should not be dependent on certain limiting restrictive conditions.

The 3 mining operations given in this paper as examples are among the largest underground operations in eastern Canada, mining at depths from 2000 m to 3000 m below surface. Under such depths, the stress in the rock mass causes many kinds of problems, from ground heat to ground control to material handling, as well as to drilling and blasting. Among the comprehensive measures to keep mining economical at greater depths, the mass blasting principle, as proven in existing operations, is an effective method to cope with highly stressed ground conditions.

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