EVALUATION OF THE STRENGTH OF ROCKS IN OPEN MINING PROCESSES IN MINING ENTERPRISES

Ravshanov Zavqiddin Yahyo ugli; Ergasheva Zulxumor Abdaaliyevna; Kushnazorov  Ibrahim Saidqul ugli; Sailau Aikerim Marat kizi

doi:10.5281/zenodo.7833963

EVALUATION OF THE STRENGTH OF ROCKS IN OPEN MINING PROCESSES IN MINING ENTERPRISES

16.04.2023 International Scientific Journal "Science and Innovation". Series A. Volume 2 Issue 4

Ravshanov Zavqiddin Yahyo ugli, Ergasheva Zulxumor Abdaaliyevna, Kushnazorov Ibrahim Saidqul ugli, Sailau Aikerim Marat kizi

Abstract. The article presents the results of experimental research on the strength properties of the rock mass used the results of studies on the assessment of slope stability in an open mine are presented. Formulas describing the correlation between the final and determined the residual strength and residual shear strength of rock samples along the failure surface. There is a new method it was developed to calculate the residual interface strength of rocks based on test data an experiment was carried out on small-sized monolithic samples with opposing technological indentors. A power estimation method is proposed characteristics of the rock mass near the fractured slope (structural attenuation coefficients and internal friction angles). The method relies on test data obtained from breaking small-sized monolithic samples with technological indentors, taking into account contact conditions along the weakening surface, and can be used in field conditions. The instability of the slope of open pit mines has a negative effect on the overall profitability of the mines, may also have safety and environmental impacts. Slope geometry has a decisive influence on the slope of an open pit, the quality of the rock mass and the presence of geological features and their characteristics should be studied. The purpose of this study is to show the method of choosing the optimal total slope angle of open pits and according to three design parameters, i.e. safety (e.g. probability of instability), performance (e.g. profit) and extraction costs (e.g. overburden removal costs). Therefore, this research attempts to a hybrid approach in which numerical modeling is combined with probabilistic analysis for estimation studies have been conducted on the stability of the open pit at different general slope angles. Two-dimensional elasto-plastic finite element was used to develop a series of models at different angles of slope. Crushing and crushing of rocks, we can observe the processes of using cutting force reduction techniques. The results show that mine profitability and overburden removal costs increase and the total slope angle decreases as it becomes steeper. However, the stability of the slope deteriorates. That is why, combining these three design parameters (such as security, performance, and cost) is highly recommended. It is necessary to pay attention when choosing the general slope angle of open pit mines.

Keywords: slope stability in mining enterprises, coefficient of strength of rock, open pit mines, techniques for reducing rock cutting force, open pit productivity

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