Optimization of the Process of Efficiency Management of the Primary Kaolin Excavation on the Curved Face of the Conditioned Area

Sobolevskyi, Ruslan; Коробійчук, Валентин Вацлавович; Levytskyi, Volodymyr; Pidvysotskyi, Victor; Kamskykh, Oleksandr; Kovalevych, Liudmyla

doi:10.17794/rgn.2020.1.10

Cited by 14 publications

(9 citation statements)

References 14 publications

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“…An important aspect of the research by the finite element method is the 'discreteness' of the computational experiment conditions with a certain set of specific values of the parameters included in the calculation [12], [13]. To summarize the recommendations designed for a certain range of mininggeological and mining-engineering conditions, it is necessary to identify a set of patterns of each parameter influence, which necessitates large-scale multifactorial computational experiments with subsequent processing the results obtained by the methods of correlation-dispersion analysis [14]- [18]. This requires a lot of time and thorough planning of the research algorithm, but, on the other hand, increases the degree of the geomechanical model objectivity and the reliability of subsequent geotechnical predictions for the stability of mine workings.…”

Section: Methodsmentioning

confidence: 99%

Research into technology of fastening the mine workings in the conditions of unstable masses

Matayev¹,

Abdiev²,

Kydrashov³

et al. 2021

Min. miner. depos.

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Purpose.Determination of the rock stability along the strike of the mass, where the drift mining of the horizon -480 m is conducted, considering the possibility of using the improved types of supports in the conditions of the 10th Anniversary of Kazakhstan’s Independence mine at the Khromtau field with the substantiation of using the effective type of fastening that increases technical and technological, operational and economic indicators of the mine. Methods. Numerical modelling of the stress-strain state of the rock mass applied at the mine have been performed using the RS2 software in a two-dimensional formulation. The rock mass state, as well as the physical-mechanical properties of mine rocks are determined according to building codes and regulations (SNiP II-94-80), depending on the category of the rock stability. Findings. It has been revealed that the combined supports from rock bolts and shotcrete are the most rational type of fastening in the studied mine. The efficiency and prospects of using the combined supports have been determined, which ensure a decrease in their material consumption and cost while increasing the reliability of mine workings and the labor productivity of miners. The use of combined support allows to increase the economy of materials for support by 1.7 times, as well as to increase the drifting rate by 1.6 times in comparison with the metal support. Originality.The paper proposes a new approach to substantiation of an effective fastening method by comparing the costs when driving horizontal underground mine workings in the mining-and-geological conditions of the 10th Anniversary of Kazakhstan’s Independence mine. Practical implications.The research results can be used when planning mining operations, in particular, stable fastening methods at the 10th Anniversary of Kazakhstan’s Independence mine of the Khromtay deposit, as well as other mining enterprises with similar mining-and-geological conditions.

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Section: Methodsmentioning

confidence: 99%

Research into technology of fastening the mine workings in the conditions of unstable masses

Matayev¹,

Abdiev²,

Kydrashov³

et al. 2021

Min. miner. depos.

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“…In average the operational overburden rate using existing methods, specific recommendations have not yet been developed for the implementation of the selected mining mode in the practical planning of mining operations at the quarry, most often associated with determining the changing width of the working area (WWA) throughout the entire life of the field in the open pit. To implement the method, it is necessary to know the development system, the opening scheme and the direction of the deepening in the quarry space, to have cross-sections or segmental plans with the boundaries of the quarry applied at the end of mining [6].…”

Section: Theory Of Experimental Researchmentioning

confidence: 99%

Improving the Efficiency of Using Hydraulic Reverse Shovel Excavators on Inclined and Steeply Dipping Fields by Controlling the Overburden Rate

Tyuleneva

Loginov

Moldazhanov³

et al. 2021

E3S Web Conf.

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The economic efficiency of open-pit mining is largely determined by the choice of a rational mining regime, which is associated with the problem of averaging the operational overburden rate over periods. At the same time, the authors do not always give recommendations when averaging the operational rates of overburden and the implementation of the selected mode of open-pit mining in practice, most often associated with determining the changing width of the working site throughout its entire existence. The article describes a method for controlling the operational overburden rate when using hydraulic reverse shovel excavators using elements of mathematical modeling of averaging the operational overburden rate, which provides high accuracy of the results and eliminates the influence of the human factor on their calculation.

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“…Усебічний аналіз літературних джерел показав, що більшість досліджень було присвячено окремим питанням розроблення ґрунту екскаваторами безперервної дії. Так, у статті [4] надається аналітична залежність для оцінки співвідношення первинної вологості ґрунту на тривалість вивантаження ковша екскаватора у вигляді полінома другого ступеня, але не розглянуто вплив форми, кількості та розміщення різців на продуктивність машини.…”

Section: аналіз публікаційunclassified

Determination of critical depth forces of cutting soils and energy consumption of chain scraper trench excavators

Kravets¹,

Suponyev²,

Goponov³

2021

Bulletin of KhNAHU

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The presented results of scientific research are aimed at solving the problem, which is associated with an increase in the productivity of the development of trenches for laying engineering communications due to the use of new less energy-intensive soil development processes with the working equipment of chain trench excavators. The aim of the work is to establish the regularities of the interaction of the working equipment of the chain scraper excavator with the soil, in which the cutters work in the critical cutting depth mode. Among the tasks that are directed to achieve the goal, it was necessary to establish the influence of soil development processes in these conditions on the technical parameters of the machine. The methodology for solving the problem is based on the idea of the theory of soil mechanics and the provisions on the critical depth of soil cutting.Applying this knowledge to the operation of the cutters of the chain excavator for cutters guarantees the consumption of the minimum specific energy and obtaining the maximum performance of the machine. Existing studies do not give a complete picture for calculating the parameters of trench excavators in which the cutters of the working body operate in the mode of critical cutting of the soil, which in turn does not allow carrying out a comprehensive calculation of the chain trench excavator and assessing the energy efficiency of its operation. The result of the research is the obtaining of theoretical dependencies for determining the cutting forces of the soil by the working body of the excavator under the conditions of the critical depth of the work of its cutters, as well as dependencies for calculating the energy indicators of the machine. The originality of the solution to the problem lies in an integrated approach, namely, it took into account not only the influence of the work of the cutters in conditions of a critical depth of cut on the technical parameters of the machine, but also the properties of the soils that are being developed. The practical significance of the results of the research is to obtain dependencies that can be used as the basis for the engineering methodology for the integrated calculation of chain-type trench eesquators in which the cutters operate in the critical blocked and half blocked cutting mode of the soil.

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Optimization of the Process of Efficiency Management of the Primary Kaolin Excavation on the Curved Face of the Conditioned Area

Cited by 14 publications

References 14 publications

Research into technology of fastening the mine workings in the conditions of unstable masses

Research into technology of fastening the mine workings in the conditions of unstable masses

Improving the Efficiency of Using Hydraulic Reverse Shovel Excavators on Inclined and Steeply Dipping Fields by Controlling the Overburden Rate

Determination of critical depth forces of cutting soils and energy consumption of chain scraper trench excavators

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