Substantiation into Parameters of Carbon Fuel Production Technology from Brown Coal

Шустов, Олександр Олександрович; Pavlychenko, Artem; Bondarenko, A.O.; Bielov, Oleksandr; Borysovska, Olena; Abdiev, Arstanbek

doi:10.4028/www.scientific.net/msf.1045.90

Cited by 17 publications

(10 citation statements)

References 40 publications

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“…Gusarovsky mining and processing plant (MPP) for molding materials is located near the Gusarovka village in the Kharkov region [1]. Since the middle of the last century, the enterprise has been developing the Gusarovsky deposit of molding sands [2].…”

Section: Introductionmentioning

confidence: 99%

Substantiation of technological resource-saving conditions for the use of equipment in the sand deposit mining

Bondarenko,

Shustov,

Pavlychenko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The mining and technological features of the Gusarovsky deposit of molding sands mining under the conditions of technological limitations of the existing enterprise have been studied. The granulometric composition of balance reserve sands, as well as overburden rocks, was analyzed. In order to obtain a high-quality commercial product with a minimum content of fine and clay particles from the initial rock mass of the surface and watered ledges, the parameters of the hydromechanized complex were substantiated by mining and processing. The calculation is based on the three most available options for filling the mining and processing complex (MPC). To substantiate the rational parameters of the MPC and ensure the purification of the commercial product from fine impurities, a graphical characteristic of the hydraulic vertical classifier GKCD2000 was constructed when supplying clean water and at a slurry concentration of 10%. The graphical characteristics of hydraulic transport systems were constructed in accordance with the design diagrams of the accepted variants of the complex. To substantiate the rational parameters of the pumping station, the characteristics of the mining and processing complex were constructed when pumping clean water and slurry at a concentration of 10%. For the first time, the rational parameters of the technological complex of mining and processing, consisting of a suction dredger – a transport slurry pipeline – and a vertical hydraulic classifier GKCD2000, have been substantiated. The development of a technological complex of mining and processing will allow the existing enterprise to continue developing the deposit and obtaining high-quality commercial products under the conditions of technological limitations.

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Section: Introductionmentioning

confidence: 99%

Substantiation of technological resource-saving conditions for the use of equipment in the sand deposit mining

Bondarenko,

Shustov,

Pavlychenko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Moreover, it should be noted that an important component of this cycle is to ensure an acceptable ecological state of the territories within which the solid fuel deposits are concentrated [9]- [12] while maintaining the safety of workers [13].…”

Section: Introductionmentioning

confidence: 99%

Mathematical model and methods for solving heat-transfer problem during underground coal gasification

Saik¹,

Berdnyk²

2022

Min. miner. depos.

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Purpose. A mathematical model development for heat transfer during underground coal gasification based on the transcendental equation solution by the Newton-Raphson method. Methods. The heat-transfer model development is based on the research into a temperature field with a variable size of the gasification zone when passing through the phase transformation boundary, which changes abruptly. The research on the coal seam T(x, t) temperature field and the displacement length of the phase transition boundary S(t) is based on the integration of the differential heat-transfer equation with the fulfillment of one-phase Stefan problem conditions. The proportionality factor (β), characterizing the ratio of the displacement length of the “generator gas – coal” phase transition boundary to the time of coal seam gasification, is determined by substituting the Boltzmann equation and using the Newton-Raphson method based on solving the obtained transcendental equation. Findings. The main problems related to laboratory research on the coal gasification process have been identified. A mathematical model of heat transfer during underground coal gasification for a closed georeactor system has been developed, taking into account the effective change in its active zones. Originality. A mathematical model of heat transfer during underground coal gasification at the phase transition boundary has been developed, under which the one-phase Stefan problem conditions are fulfilled. Dependences of the change in the underground gas generator temperature, taking into account the change in the active zones of chemical reactions along the length of the combustion face and the gasification column, have been revealed. In addition, the dependences of the change in the phase transition boundary of a “generator gas – coal” heterogeneous system have been determined, which characterize the displacement length of the phase transition boundary on time and reveal the relationship between the thermal conductivity coefficient, specific heat capacity, as well as bulk density of coal and its calorific value. Practical implications. A method has been developed to determine the displacement length of the phase transition boundary of a “generator gas – coal” heterogeneous system and its relationship between the time and temperature of gasification process. This makes it possible to predict in the future the change in the active zones of the underground gas generator along the length of the gasification column.

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“…Any technological solution to improve the effi ciency of mineral extraction should be optimal from the point of view of the safety of mining, which is primarily related to the stability of rock openings. Ensuring the stability of the open pit walls remains the most topical problem for mining companies, as it is associated with a large number of influencing factors, whose variability results in changes in the stressstrain state (SSS) of the rock mass [5,6].…”

Section: Introductionmentioning

confidence: 99%

Technology of an open pit refinement under limit stability of sides

Moldabayev¹,

Sultanbekova²,

Адамчук³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To establish the feasibility of refining deep open-pit mines below the boundary of the use of combined motor-conveyor transport with an increased slope angles of the pit walls using the developed transport unit for reloading rocks to overlying horizons during the reactivation of pillars under transport berms. Methodology. Preparation of a digital block model of the deposit, the elaboration of 3D geomechanical models for the dynamics of mining, 2D and 3D numerical simulation of the rock stress-strain state of the outcrops of opencast workings, mathematical modeling of stepwise ore reserves and mining schedule, patent research and feasibility study. Findings. It is advisable to carry out mining in terms of the marginal rock state with an increase in the slope of the pit sides below the limit of application of the cyclic and continuous method in ultra-deep open pits. Such design of pit sides is achieved when benches are mined from top to bottom within the boundaries of steeply inclined layers with the use of inter-bench loaders of the developed designed in the completion zone. Provisions for the selection and feasibility of using the loader in the deep zone are formulated based on demarcation of application zones of cyclic (road transport) and cyclic-flow (combined road-conveyor transport) technologies. Originality. Schematization of the mining operation was performed based on the calculated values of safety factor of sides, which allows increasing the slope angles of the pit walls of even ultra-deep open pits in the completion zone. It was found that with deepening of mining, the zones of potential sliding move away from the loose overburden to lower ore benches closer to the final depth of the Kacharsky open pit (760 m), but the safety factor corresponds to the required value according to the design standards. Practical value. An increase in the slope of the pit walls in the completion zone can be achieved using the developed loading installation, the main difference of which is that it can be moved without dismantling under conditions of reactivation of transport pillars (with an increase in lifting height by 1.54.5 times compared to the known equipment).

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Substantiation into Parameters of Carbon Fuel Production Technology from Brown Coal

Cited by 17 publications

References 40 publications

Substantiation of technological resource-saving conditions for the use of equipment in the sand deposit mining

Substantiation of technological resource-saving conditions for the use of equipment in the sand deposit mining

Mathematical model and methods for solving heat-transfer problem during underground coal gasification

Technology of an open pit refinement under limit stability of sides

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