THE ROCK PILE QUALITY CONTROL DURING THE BLASTING OPERATIONS AT THE CONSTRUCTION MATERIALS OPEN-CAST MINES

摘要

The paper is concerned with the problem of the blasting energy application efficiency improvement during the huge blasts at the construction materials open-casts located in the Leningrad Region. The particle size distribution tests and the geometrics determination of the rock pile were performed at the open-casts of CJSC "Kamennogorskoe kareroupravlenie". The assessment of the rock pile quality after blast was performed and the gravimetric composition quality of the broken rock mass was also performed. On the basis of the performed measurements of the rock mass gravimetric composition, it was found that the application of the new design charges allows for the two-fold reduction of the oversize pieces content and the rock fragmentation quality improvement (it means the increase in the medium-size pieces amount nearly by the quarter of the blasted rock mass total volume). The application of the new design charges also allowed for the pile dimensions optimization, which in its turn permitted to use the loading machinery to the maximum extent possible. Jr. of Industrial Pollution Control 33(1)(2017) pp 1007-1012 www.icontrolpollution.com Review *.