Výsledky vyhledávání - "Zbigniew Lubosik"

Akademický článek

Assessment of Combustion Cavern Geometry in Underground Coal Gasification Process with the Use of Borehole Ground-Penetrating Radar

Autor: Zenon Pilecki, Robert Hildebrandt, Krzysztof Krawiec, Elżbieta Pilecka, Zbigniew Lubosik, Tomasz Łątka

Publikováno v: Energies, Vol 16, Iss 18, p 6734 (2023)

In this study, the shape and size of a combustion cavity with a fracture zone in the gasified coal seam was determined with the use of control boreholes and a ground-penetrating radar (BGPR) test. The underground coal gasification (UCG) field-scale e

Externí odkaz: https://doaj.org/article/4f71d41654f746a3bb6be50fe5399943

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Akademický článek

QEMSCAN® automated mineralogical analysis of PM2.5 and PM4: A preliminary study of underground coal mine dust from Poland and Slovenia

Autor: Diane Johnson, Gavyn. K. Rollinson, Ali Talib Arif, Teresa Moreno, Pedro Trechera Ruiz, Robert Lah, Zbigniew Lubosik, Thomas Pindel, Richard Gminsk, Ben J. Williamson

Publikováno v: Frontiers in Earth Science, Vol 10 (2022)

Determining the physical and chemical properties of airborne dusts in occupational settings is essential for assessing their potential toxicity as well as the effectiveness of respiratory protective equipment and dust mitigation measures. Here, we re

Externí odkaz: https://doaj.org/article/68e9340181dd495c9b902d88b127c8a8

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Akademický článek

Experimental and CFD Simulations of the Aerosol Flow in the Air Ventilating the Underground Excavation in Terms of SARS-CoV-2 Transmission

Autor: Tomasz Janoszek, Zbigniew Lubosik, Lucjan Świerczek, Andrzej Walentek, Jerzy Jaroszewicz

Publikováno v: Energies, Vol 14, Iss 16, p 4743 (2021)

The paper presents the results of experimental and model tests of transport of dispersed fluid droplets forming a cloud of aerosol in a stream of air ventilating a selected section of the underground excavation. The excavation selected for testing is

Externí odkaz: https://doaj.org/article/aadd7074dd0b4547aea73844ebf948bc

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Akademický článek

Laboratory pull-out tests on fully grouted rock bolts and cable bolts: Results and lessons learned

Autor: Isabelle Thenevin, Laura Blanco-Martín, Faouzi Hadj-Hassen, Jacques Schleifer, Zbigniew Lubosik, Aleksander Wrana

Publikováno v: Journal of Rock Mechanics and Geotechnical Engineering, Vol 9, Iss 5, Pp 843-855 (2017)

Laboratory pull-out tests were conducted on the following rock bolts and cable bolts: steel rebars, smooth steel bars, fiberglass reinforced polymer threaded bolts, flexible cable bolts, IR5/IN special cable bolts and Mini-cage cable bolts. The diame

Externí odkaz: https://doaj.org/article/985d38efcf384656a3bef709dd216361

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The role of powered support in ensuring the proper longwall working cross-section area in rockburst-prone seams

Autor: Aleksander Wrana, Sylwester Rajwa, Zbigniew Lubosik, Wojciech Masny, Andrzej Walentek

Publikováno v: MATEC Web of Conferences, Vol 305, p 00081 (2020)

In Poland, for underground hard coal seam extraction, the longwall method is used. Retreat longwalls with natural roof caving in the gob are the most common. Currently it is estimated that about a half of the hard coal output in Poland originates fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64864f69b1d81cccbae549e3142bd82a
https://www.matec-conferences.org/articles/matecconf/pdf/2020/01/matecconf_sesam20_00081.pdf

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The Influence of In-Situ Rock Mass Stress Conditions on Deformation and Load of Gateroad Supports in Hard Coal Mine

Autor: Petr Waclawik, Petr Horak, Aleksander Wrana, Zbigniew Lubosik

Publikováno v: Procedia Engineering. 191:975-983

The stress-strain state of the rock mass in the neighbourhood of the mining galleries is absolutely critical considering their behaviour particularly load and deformation. The stress-strain state can be affected by numerous geological and mining fact

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ea452c673f4d19fe42e3fb0edc89c31
https://doi.org/10.1016/j.proeng.2017.05.269

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Laboratory pull-out tests on fully grouted rock bolts and cable bolts: results and lessons learned

Autor: Aleksander Wrana, Jacques Schleifer, Laura Blanco-Martín, Isabelle Thenevin, Zbigniew Lubosik, Faouzi Hadj-Hassen

Publikováno v: Journal of Rock Mechanics and Geotechnical Engineering
Journal of Rock Mechanics and Geotechnical Engineering, Elsevier, 2017, octobre 2017, 9 (5), pp.843-855. ⟨10.1016/j.jrmge.2017.04.005⟩
Journal of Rock Mechanics and Geotechnical Engineering, vol 9, iss 5
Journal of Rock Mechanics and Geotechnical Engineering, Vol 9, Iss 5, Pp 843-855 (2017)
Thenevin, I; Blanco-Martín, L; Hadj-Hassen, F; Schleifer, J; Lubosik, Z; & Wrana, A. (2017). Laboratory pull-out tests on fully grouted rock bolts and cable bolts: Results and lessons learned. Journal of Rock Mechanics and Geotechnical Engineering, 9(5), 843-855. doi: 10.1016/j.jrmge.2017.04.005. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/5fr562gc

© 2017 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences Laboratory pull-out tests were conducted on the following rock bolts and cable bolts: steel rebars, smooth steel bars, fiberglass reinforced polymer threaded bolts, flexible ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8d6d3a0c6b29e69fb47eb928f46a2b8
https://hal-mines-paristech.archives-ouvertes.fr/hal-01573387

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