Výsledky vyhledávání - "Niedbalski Zbigniew"

Akademický článek

Stability Assessment of Mining Excavations: the Impact of Large Depths

Autor: Majcherczyk Tadeusz, Niedbalski Zbigniew, Bednarek Łukasz

Publikováno v: Studia Geotechnica et Mechanica, Vol 40, Iss 3, Pp 180-187 (2018)

Back in the early 1980s, coal deposits occurring at depths of ~700 m below surface were already regarded as large-depth deposits. Meanwhile, today the borderline depth of large-depth mining has extended to >1,000 m. Design, excavation and maintenance

Externí odkaz: https://doaj.org/article/03282d81397d4322abc43b382d9d799f

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Akademický článek

The Impact of Multiple Seam Mining Exploitations on Seismic Activity and State of Stress

Autor: Majcherczyk Tadeusz, Niedbalski Zbigniew

Publikováno v: Studia Geotechnica et Mechanica, Vol 39, Iss 1, Pp 53-62 (2017)

The paper presents an analysis of seismic activity for selected areas of hard coal mine executing exploitation in a rock mass with a variable degree of rock disturbance, i.e., also with a varied number of previous mined-out seams. A distribution of v

Externí odkaz: https://doaj.org/article/da3a28ffa42048f2a84fd3bae9b9382d

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Akademický článek

Numerical modeling of open pit (OP) to underground (UG) transition in coal mining

Autor: Nguyen Phu Minh Vuong, Niedbalski Zbigniew

Publikováno v: Studia Geotechnica et Mechanica, Vol 38, Iss 3, Pp 35-48 (2016)

The primary objective of the present paper is an attempt at evaluating the influence of sub-level caving operations on the slope stability of a still-functioning open pit coal mine in Vietnam. Initially, various methods of predicting the impact of un

Externí odkaz: https://doaj.org/article/7829c780344b4226bd1672349246a247

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Akademický článek

Roadway Stability Evaluation on the Basis of Modern Monitoring of Displacement

Autor: Majcherczyk Tadeusz, Niedbalski Zbigniew, Ulaszek Artur

Publikováno v: Studia Geotechnica et Mechanica, Vol 37, Iss 1, Pp 45-52 (2015)

The paper presents the application of a 3D laser measurement technology in a modern monitoring of roadways. The authors analyze the possibility of using a three-dimensional scanning measurement of longwall working dimensions. The measurement results

Externí odkaz: https://doaj.org/article/a2313e60594a49edbe59552f9f588eec

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Akademický článek

Difficulties in maintaining shaft lining – testing methods and repair methods – a case study

Autor: Niedbalski Zbigniew, Małkowski Piotr

Publikováno v: E3S Web of Conferences, Vol 201, p 01016 (2020)

The paper performs the standards of shaft lining inspections used in Poland. They comprised four criterions: lining homogeneity, level of its corrosion, watertightness and load bearing capacity of the lining and the limit values for every criterion w

Externí odkaz: https://doaj.org/article/e10e2189625d4996a90a5313999f95d3

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Akademický článek

Geomechanical Assessments of Simultaneous Operation in the Case of Transition from Open Pit to Underground Mine in Vietnam

Autor: Niedbalski Zbigniew, Nguyen Phu Minh Vuong, Widzyk-Capehart Eleonora

Publikováno v: E3S Web of Conferences, Vol 35, p 01001 (2018)

Nowadays, for a number of reasons, many open pit mines are considering a transition from Open Pit (OP) to Underground (UG) to remain competitive. In OP-UG transition, UG operation is operated simultaneously with the OP operation for a certain period

Externí odkaz: https://doaj.org/article/462f6a80ecb941c89a25a46a4bb6c924

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