Статті КВПС

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ENG: Articles of DMTS

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Fundamentals of the Energy Approach to Explosive Effect Acting on the Constructions of Underground Structures
(IOP Publishing Ltd, 2026) Tiutkin, Oleksii L.; Ostapenko, Igor; Hernych, Mykola
ENG: This research analyzes current trends in calculating the construction of underground structures. It finds that, considering the objective situation, the extreme load combination (constant loads plus one extreme load) should be revised. This revision is related to an increase in cases of shock and explosive effects on the constructions of underground structures that may serve as shelters. The research aims to combine analytical foundations, which provide data on explosive effect, with a numerical analysis methodology that includes an energy approach. Solving this problem enables the analysis of the explosive effect on constructions of the underground structure, considering the overall stress-strain state within the "construction of the underground structure – surrounding massif" system. The authors present the analytical basis of the energy approach to the explosive effect acting on constructions of underground structures. Ways for implementing these foundations into the methodology of numerical analysis are described. A numerical analysis of the underground lobby construction for impulse impact, replacing the explosion, is performed, which is calculated in accordance with the given analytical formulas. A comparison is made between the deformation energy of the lobby construction – an integral parameter that includes stress and displacement – and the deterioration energy of the C25/30 concrete grade.
Overview of Technologies For Constructing the Facilities at the Dnister Pumped Storage Power Station
(Dnipro Polytechnic (National Mining University), Dnipro, 2019) Radkevych, Anatolii V.; Petrenko, Volodymyr D.; Tiutkin, Oleksii L.; Horbatiuk, Yurii M.; Parinov, V.
ENG: Purpose. Perform an overview of the construction technologies and substantiate the effectiveness of the Ukrainian experience in building a pumped storage power station (PSPS) on the Dniester River in difficult engineering-geological conditions with the construction of large underground structures, including mine shafts and hydraulic engineering tunnels. Methods. In the work, the main technological methods have been studied and analysed of hydraulic engineering construction of complex large underground structures in the rocks with medium hardness according to M.M. Protodiakonov scale using a special method of a well lowering and a combined method of drilling and blasting operations during mine workings drivage, which is based on the slow and short-delay blasting. The anchors calculation, when driving the water sup-ply conduits, has been made from the condition of suspending the block of disturbed rock, the thickness of which was taken equal to the roof arch height according to M.M. Protodiakonov. The parameters of the sprayed plaster base concrete have also been calculated according to V.M. Mostkov theory. Findings. The analysis of the current state of research, theoretical positions and world practice of construction of PSPS has been made, which testifies the high potential of this type of energy facilities. The efficiency of the underground hydraulic engineering construction of the Dniester Station has been substantiated. The results are presented of a complex application of mining and construction methods, as well as processing equipment for the construction of horizontal and tailrace conduits, drainage adits and vertical mines for hydraulic units in difficult engineering and geological conditions. As a result of performed analytical studies, the combined method of constructing the anchor support of sprayed plaster base concrete, when driving the water supply conduits, which is the most rational for engineering and geological conditions of increased complexity, has been substantiated. Originality. The efficiency of the lowering well method in a thixotropic jacket when constructing in the soft soils has been deter-mined under the conditions of building a PSPS on the Dniester River. The step-by-step combined method of constructing the anchor support of sprayed plaster base concrete, when driving the water supply conduits has been substantiated. Practical implications. The most rational ways of conducting a range of mining-construction works have been substantiated and implemented, allowing to construct a complex pumped storage facility with a capacity of over 2.0 million kilowatts, ensuring a significant increase in the power supply capacity of the West Ukraine region.