Rock Products

MAR 2013

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

Issue link:

Contents of this Issue


Page 32 of 99

DRILLING BLASTING and quantity of explosives, and type and delay of detonators. The layout of the blast hole pattern should then be set out through the use of surveying instruments. Drilling Execution ��� Checking that the drilling is done correctly as per the blast de��� sign is very important including veri��� fying the hole depth, diameter and inclination using accurate blast hole geometry measurement equipment. Incorrect drilling including wrong po��� sitioning, incorrect angle, hole devia��� tion and incorrect depth can pose serious risks. Explosives Loading Plan ��� Effective implementa��� tion and validation of the loading plan including the position of delays, charge, charge distribution, type and quantity of explosives, and stemming requirements. Conclusion The improvements gained from an op��� timized drilling and blasting operation can be measured by reduced costs per ton for blasting and drilling, improved loading speeds, reduced oversize breakage and handling, reduced en��� ergy consumption and less fines. The average measured saving from the pilot study across 12 sites is about four cents per ton. Across Lafarge���s total aggregate and cement mined tons (250 Mt) this equates to a mini��� mum of $7.5 million savings annually. Lafarge is confident that further sav��� ings can be made through a rigorous optimization process and is currently rolling out the system across the group. Information for this article courtesy of MDL,, and X. Th��rin, vice president, land, minerals and mining. Custom Dewatering Solutions for Minerals With low energy and polymer usage, BDP's Model Sahara Belt Press will lower your operating & maintenance costs! American Made BDP Industries' model Sahara Belt Press will produce: �� Cake solids higher than any other �� Exceedingly long Belt Life Production ��by any othercapacity unachievable manufacturer Lower maintenance costs �� ��No need for access platforms or stairs �� Responsive / Experienced Customer Service Vulcan Material, Columbia, SC CEMEX, Queens Creek Vulcan Material, Reliance, CA CEMEX, Arizona �� Gravity Belt Thickeners �� Process Control Panels �� Belt Presses �� Equipment Restoration �� Rotary Drum Concentrators �� On-Site Service & Mobile Demos �� Polymer Systems Sales: 518-527-5417 Factory: 518-695-6851 Fax: 518-695-5417 Email: ROCKproducts ��� MARCH 2013 31

Articles in this issue

Links on this page

Archives of this issue

view archives of Rock Products - MAR 2013