Experimental Research of Physical Processes in Selective Extraction of Ore and Gangue from Flat-Dipping Veins
K. N. TRUBETSKOY1, YU. P. GALCHENKO1, A. S. SHUKLIN2
1IPKON, Russian Academy of Sciences, Moscow, 111020 Russia
2Resursy Albazino, Krasnoyarsk, 660049 Russia
Keywords: пологие жилы, разработка, разнонаправленный отброс взрывом, породная масса, эффективность взрыводоставки, рудная масса, дополнительное дробление, Flat-dipping veins, mining, differently directed controlled trajectory blasting, rock mass, throw efficiency, ore mass, additional fragmentation
Abstract
The experimental research findings on processes that take place during differently directed controlled trajectory blasting of ore and gangue in underground mining of flat-dipping veins are presented. It is found that methods for designing blast patterns should take into account both linear concentration of energy and dynamics of the increase in resistance to throw of rocks and ore in a narrow stoping area. Based on the modeling data, the throw coefficient and blasting front advance are plotted as functions of geometrical and energy characteristics of the model. It is shown that blasting and throw of ore in the stoping zone is accompanied with the effect of additional fragmentation of ore due to collision with the stope roof.
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