Перегляд за Автор "Kamenets, V. I."

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Experience and prospects of innovative main roadways construction and maintenance technologies of new coal units of PJSC «Mine Management «Pokrovske»
(ПП "ТЕХНОЛОГІЧНИЙ ЦЕНТР"; Полтавський державний аграрний університет, 2023) Levit, V.  V.; Kamenets, V. I.; Chebotenko, D.; Левіт, В. В.; Каменець, В. І.
The object of research is the proven and promising innovative technologies for the construction and maintenance of main roadways in difficult mining and geological terms of the Private Joint Stock Company (PJSC) Pokrovske Mine Management of Metinvest-Pokrovskvugillia Group (Ukraine). The problem focused by the research is to ensure the effective innovative and modernized known technologies application of the main roadways construction and maintenance in new coal units. Namely, the roadways and chambers of the shaft yards, long horizontal and inclined main roadways to improve their operational state and technical and economic indicators of mining engineering and extracting operations. Based on the accumulated production experience, the results of the roadways state survey under construction and in operation, analysis of documentation and scientific and technical developments of world scientific institutions, recommendations for the investment projects implementation in terms of construction and mining technologies optimizing had formulated. The recommendations include the introduction of combined support systems adapted to mine management conditions, tunneling equipment of a new technical level of the world’s best producers, methods of roadways maintaining by location in offloaded areas, and modern means of Geomechanic situation monitoring. The expected economic benefit of reducing the cost of roadways maintaining may be 20–25 %. The results are summaries of cooperation with the engineering and technical staff of Mine Management Pokrovske and Metinvest Holding. The results can be used in practice now, and more broadly after the victory and the start of economic recovery, including in Ukraine’s mining sector.
Mechanical model and numerical analysis of a method for local rock reinforcing to control the floor heave of miningaffected roadway in a coal mine
(IOP Publishing, 2022) Sakhno, I. G.; Sakhno, S. V.; Kamenets, V. I.; Сахно, І. Г.; Сахно, С. В.; Каменець, В. І.
A floor heave controlling method has been substantiated, based on the creation of locally reinforced zones of a special shape in roadway floor, which allows saving stability even with a low rocks friction ratio. The method is based on a mechanical model of the formation of an increasing strength spacer system in roadway floor. The numerical analysis of rock massif stress-strain state carried out by the finite element method, has made it possible to determine the mechanism of floor heave during rock reinforcing. The performed analysis of the simulation results has made it possible to determine the influence of the quality of rock reinforcing and the rock friction ratio value on the amount of heave in the mining-affected roadway. The effectiveness of the proposed method has been proven as a result of a comparative analysis.
Numerical studies of floor heave control by the rock bolts reinforcement technology in retained gob-side gateroad
(EDP Sciences, 2024) Sakhno, I. G.; Sakhno, S. V.; Kamenets, V. I.; Cabana, E. C.; Сахно, І. Г.; Сахно, С. В.; Каменець, В. І.
The effectiveness of modified rock bolts reinforcement technology for floor heave control in gob-side entry retaining was studied in this paper. A finite-element numerical simulation was used to analyse stress-strain state of surrounding rocks before and after immediate floor reinforcement with six floor support schemes. It was found that after immediate floor reinforcement with rock bolts with diameter 32 mm and 96 mm, floor heave in retained gob-side gateroad reduces by 2.94 – 3.6 times respectively. The modification of rock bolt reinforcement scheme by the additional installation of piles in the entry corners was proposed. Piles installation significantly reduces the zone of horizontal and vertical post-peak strains in the gateroad floor. The best variant among compared ones is a floor support scheme with two corner piles, 1 m and 2 m long. With this scheme, floor heave decreases by 3.05 times. The comparison of the materials costs of the floor support schemes were performed. As a result, the most effective floor support scheme was proposed and prospects for the further progress of floor reinforcing technologies were outlined.
Stress environment around head entries with pillarless gobside entry retaining through numerical simulation incorporating the two type of filling wall
(IOP Publishing, 2022) Sakhno, I. G.; Sakhno, S. V.; Kamenets, V. I.; Сахно, І. Г.; Сахно, С. В.; Каменець, В. І.
Longwall mining is the most productive system for underground extraction of coal. Many coal mines use a pillarless mining. Reserving a gateroad for the usage of next panel mining is a popular gob-side entry retaining. Thus, the conventional entry retaining method requires an installation of filling walls. The mechanical properties of filling materials largely determine the quality of job-side entry retaining. Stress field evolution study around head entries when main roof console length increase with two variants of filling wall. Ansys code was used to analyze the stress evolution law under different mining conditions. As a result of numerical simulation, it was found that in the case of gob-side entry retaining, the localization of maximum stresses in surrounding rock is determined by the length console of the main roof, which hanging on the border with the gob, and the filling walls deformation module. Potential location of roof cutting, stress gradient and extremum stress in the main roof define the stability of entries. Main roof console length and filling material parameters control can help to the formation of a stable structure around the entry to meet the requirements of the next working face.
Перспективи використання новітніх технологій спорудження стволів та свердловин для повоєнної розбудови вугільної галузі України
(Донецький національний технічний університет, 2023) Левіт, В. В.; Каменець, В. І.; Мукомел, Ю. В.; Levit, V.  V.; Kamenets, V. I.; Mukomel, Yu. V.
Аналіз виробничого досвіду, науково-технічних розробок і оцінка перспектив використання і розвитку новітніх технологій спорудження вертикальних шахтних стволів та свердловин для повоєнної розбудови вугільної галузі України.
Про досвід і перспективи застосування технологій проходження вертикальних стволів в Україні
(Донецький національний технічний університет, 2020) Левіт, В. В.; Каменець, В. І.; Мукомел, Ю. В.; Levit, V.  V.; Kamenets, V. I.; Mukomel, Yu. V.
Аналіз виробничого досвіду, науково-технічних розробок і оцінка перспектив застосування і розвитку технологій спорудження вертикальних шахтних стволів в Україні в контексті необхідності відновлення вугледобувної галузі для збереження енергетичної незалежності держави.
Технологія та організація проведення і підтримання гірничих виробок нових вугільних блоків ПРаТ «Шахтоуправління «Покровське»
(Донецький національний технічний університет, 2023) Левіт, В. В.; Каменець, В. І.; Чеботенко, Д. О.; Масик, О. О.; Levit, V.  V.; Kamenets, V. I.; Chebotenko, D.; Masyk, O. O.
Аналіз виробничого досвіду, науково-технічних розробок і оцінка перспектив впровадження нових та удосконалення випробуваних технологій проведення і підтримання гірничих виробок та покращення організації цих процесів.