Optimization of blasting works during the destruction of masses with complex structure

B. Ekvist¹

¹Physical Processes of Mining and Geocontrol Department, National University of Science and Technology “MISiS”, Moscow, Russia

Min. miner. depos. 2017, 11(3):34-39

https://doi.org/10.15407/mining11.03.034

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ABSTRACT

Purpose.To study the quality of crushing rocks with different strength properties, depending on parameters of the charges location and the blasting time.

Methods. Based on the destruction of laboratory samples, histograms of granulometric composition were constructed and analyzed depending on the charges location and the blasting time.

Findings. The regularities of the granulometric composition are received depending on the charges location and the blasting time.

Originality.The improvement of crushing due to explosions of charges with changed parameters depending on strength properties of samples is proved.

Practical implications. The method is proposed for changing the location of charges and the time of their blasting, depending on the rock mass structure, which is obtained, in particular, during its radiographic inspection by the georadar.

Keywords: masses with complex structure, georadar, georadiolocation, gradient, strength properties of rocks, parameters of drilling and blasting operations, explosion results

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