Impact of electronic blasting detonators on downstream operations of a quarry

被引:0
作者
Bilodeau, M. [1 ]
Labrie, D. [1 ]
Boisclair, M. [1 ]
Beaudoin, R. [2 ]
Roy, D. [2 ]
Caron, G. [3 ]
机构
[1] NRCan, CANMET-MMSL, Ottawa, ON
[2] DynoConsult, Sainte-Sophie, QC
[3] Dyno Nobel Canada Inc., Sainte-Sophie, QC
关键词
Aggregate; Blasting; Crushing; Rock breakage; Surface mining;
D O I
10.1007/bf03403383
中图分类号
学科分类号
摘要
In 2005, CANMET-MMSL used its pool of expertise in ground control, open pit and underground mine engineering, mineral processing, information technology and applied mineralogy to launch a mine-to-mill research project. The objective of the project was to optimize the distribution of rock breakage energy among blasting, crushing and grinding activities, thereby maximizing the efficiency of energy utilization within comminution processes. Tests were designed to demonstrate that this approach could reduce energy consumption, thus contributing to the reduction of green house gas (GHG) production in the Canadian mining industry. The project was accomplished in collaboration with DynoConsult and Dyno Nobel Canada Inc., a world leader in commercial explosives. Data analysis from 12 blasts (six with electronic and six with pyrotechnic detonators) in three different geological formations of a quarry (soft, medium and hard rock) shows that electronic blasting technology increases rock fragmentation by 15% (in hard rock) to 20% (in soft rock). A more uniform rock fragment size distribution is also obtained. The impact of the improved quality blast product on downstream processes of the quarry is a productivity increase of 5% in rock excavation and transportation, an energy reduction of 10% at the primary crusher and an increase of 15% of the primary crusher throughput. Extended to the Canadian mining industry, such results would represent a GHG emission reduction of about 0.05 Mt/y.A soft-sensor prototype, based on primary crusher data (i.e., energy consumption, throughput, feed and product size distribution) and a simplified computerized process model, was developed for on-line measurement of the rock operating work index. Additionally, 385 rock samples and specimens were collected and prepared to determine the tensile and compressive strength of the rock material, to evaluate the aggregate crushing work index and to examine the development of micro- and macro-fractures by means of binocular and SEM microscopy. Blast-induced rock damage was evaluated at the end of the laboratory-testing program. Even though a reduction of rock hardness of around 30% was observed after blasting, the impact of the blasting method (i.e., use of electronic or pyrotechnic detonators) on the induced rock damage could not be observed. It is either absent or not perceptible with the accuracy of the measuring techniques and the number of samples analyzed. Copyright 2008, Society for Mining, Metallurgy, and Exploration, Inc.
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页码:32 / 40
页数:8
相关论文
共 13 条
[1]  
Benchmarking the Energy Consumption of Canadian Open-Pit Mines, (2000)
[2]  
Benchmarking the energy consumption of Canadian underground bulk mines, (2002)
[3]  
Briggs C.A., Bearman R.A., An investigation of rock breakage and damage in comminution equipment, Minerals Engineering, 9, 5, pp. 489-497, (1996)
[4]  
Evertsson C.M., Bearman R.A., Investigation of interparticle breakage as applied to cone crushing, Minerals Engineering, 10, 2, pp. 199-214, (1997)
[5]  
Katsabanis P.D., Gregerson S., Kunzel G., Pollanen M., Pelley C., Kelebek S., Effects of blasting on damage and grindability of impacted rock, CIM Bulletin, 98, 1091, (2006)
[6]  
Klein C., Hurlbut C.S., Dana J.D., Manual of Minerology, (1998)
[7]  
NRCan, Climate change technology and innovation initiative - CCTII, AEE-Industry Scope Tables, (2005)
[8]  
Ozkahraman H.T., A meaningful expression between Bond work index, grindability index and friability value, Minerals Engineering, 18, 10, pp. 1057-1059, (2005)
[9]  
Palangio T.C., Franklin J.A., Maerz N.H., Wipfrag - A breakthrough in Fragmentation Measurement, Proceedings of the 6th High-Tech Seminar on State-of-the-Art Blasting Technology, Instrumentation and Explosives, pp. 943-971, (1995)
[10]  
Revnivtsev V.I., We really need revolution in comminution, Proceedings of the 16th International Mineral Processing Congress, pp. 93-114, (1988)