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Study of the effect of blasted rock mass parameters on the performance of excavator-automobile complex

The paper establishes the dependencies of the influence of the parameters of the exploded rock mass (VGM) – average weighted piece, homogeneity index and output of substandard piece, on the productivity of the excavator-automotive complex (EAC) on the EAK performance on the example of the WK-35 high-capacity electric Rope Shovel excavator with a bucket capacity of 35 m3 and the CAT 793D heavy-duty dump truck with a load capacity of 220 tons. Quality indicators of blasting preparation of the massif for excavation, determine the main operational characteristics of EAK – downtime and productivity, it is important to consider when selecting the parameters of drilling and blasting operations and optimization of blasting projects. By the method of cyclic photo and video recording of the blasted block face, the data were obtained to establish the distribution of the VGM output, loading cycle time and loading degree of the dump truck. During image processing by the photoplanimetry method, the average weighted piece of the VGM, the percentage of the output of the substandard piece and the homogeneity index of the grading structure were determined. By the method of visual processing of images with the subsequent data verification from the system of dispatching of the open pit we obtained the indicators of productivity of EAK WK-35 and CAT 793D. By regression and correlation analysis methods, the dependences affecting the EAK productivity during loading and the parameters of the VGM, allowing to ensure its high productivity in the conditions of overburden mining in the gold ore deposit, were established.

Keywords: drilling and blasting operations, excavation, blasted rock mass, performance, excavator WK-35, dump truck CAT 793D, excavator-automobile complex, fragmentation, uniformity index, substandard fraction.
For citation:

Marinin M. A., Rakhmanov R. A., Dolzhikov V. V., Sushkova V. I. Study of the effect of blasted rock mass parameters on the performance of excavator-automobile complex. MIAB. Mining Inf. Anal. Bull. 2023;(9-1):35-48. [In Russ]. DOI: 10.25018/0236_1493_2023_91_0_35.

Acknowledgements:
Issue number: 9
Year: 2023
Page number: 35-48
ISBN: 0236-1493
UDK: 622.22
DOI: 10.25018/0236_1493_2023_91_0_35
Article receipt date: 29.06.2023
Date of review receipt: 09.08.2023
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,
R.A. Rakhmanov, Cand. Sci. (Eng.), Researcher, Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia, e-mail: ruslan1250@mail.ru, ORCID ID: 000-0002-5341-2274,
V.V. Dolzhikov1, Cand. Sci. (Eng.), Assistant Professor, e-mail: dolzhikov_vv@pers.spmi.ru, ORCID ID: 0000-0001-8851-2913,
V.I. Sushkova1, Leading Specialist, e-mail: s171560@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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