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The experience of using the Kuz-Ram model in describing of grain size distribution of blasted rock mass

The article gives an analysis of probabilistic distributions used in mining practice, which describe the granulometric composition of the exploded rock mass. Experimental distributions of fractions of the exploded rock mass were obtained for the conditions of experimental blocks of an ore quarry using the WipFrag software product. The experimental data were compared with the predicted distributions according to the Kuz–Ram model. It is established that the parameters of the initiation of borehole charges affect the actual distribution of the granulated rock mass. Depending on the initiation scheme and deceleration ratings of the cut-in and echelon surface networks, the values of the line of least resistance and the distance between borehole charges during a mass explosion change. The analysis showed that taking into account the isochronous initiation of a mass explosion makes it possible to achieve a better agreement with the experimental grain composition distribution curves in terms of the uniformity of the distribution of pieces. A method for calibrating the Kuz–Ram model to describe the results of explosive rock destruction is proposed. The proposed approach takes into account the actual values of the line of least resistance and the distance between the borehole charges, formed taking into account the isochronous initiation (isoline simultaneity).

Keywords: blasted rock mass, grain size distribution, Kuz-Ram model, parameters of drilling and blasting operations, uniformity index, initiation pattern, blast pattern, delay interval.
For citation:

Marinin M. A., Afanasyev P. I., Sushkova V. I., Ustimenko K. D., Akhmetov A. R. The experience of using the Kuz-Ram model in describing of grain size distribution of blasted rock mass. MIAB. Mining Inf. Anal. Bull. 2023;(9-1):96-109. [In Russ]. DOI: 10.25018/0236_1493_2023_91_0_96.

Acknowledgements:
Issue number: 9
Year: 2023
Page number: 96-109
ISBN: 0236-1493
UDK: 622.22
DOI: 10.25018/0236_1493_2023_91_0_96
Article receipt date: 21.07.2023
Date of review receipt: 16.08.2023
Date of the editorial board′s decision on the article′s publishing: 10.08.2023
About authors:

M.A. Marinin1, Cand. Sci. (Eng.), Assistant Professor, e-mail: marinin_ma@pers.spmi.ru, ORCID ID: 0000-0002-5575-9343,
P.I. Afanasyev1, Cand. Sci. (Eng.), Assistant Professor, e-mail: Afanasev_PI@pers.spmi.ru, ORCID ID: 0000-0001-5271-6121,
V.I. Sushkova1, Leading Specialist, e-mail: Sushkova_VI@pers.spmi.ru,
K.D. Ustimenko1, Research Student, e-mail: s201036@stud.spmi.ru,
A.R. Akhmetov1, Research Student, e-mail: s201038@stud.spmi.ru,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

 

For contacts:

M.A. Marinin, e-mail: marinin_ma@pers.spmi.ru.

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