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1
Content available Wielokryterialna analiza zagrożeń ergonomicznych z ilościową oceną ryzyka dla operatora samojezdnego wozu wiercąco-kotwiącego
Korzeniowski Waldemar, Nowak-Senderowska Dagmara
Przegląd Górniczy
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2021
|
T. 77, nr 10-12
54--59
PL
W artykule zaprezentowano nowe, rozszerzone podejście, w porównaniu do klasycznej oceny ryzyka zawodowego w górnictwie, podając przykład kompleksowej analizy i oceny wybranych zagrożeń na stanowisku pracy. Teoretyczny przebieg analizy i oceny przedstawiono w formie czteroetapowego algorytmu, a realizację oceny przeprowadzono na podstawie trzech wybranych zagrożeń na stanowisku operatora samojezdnych wozów wiercąco-kotwiących w kopalni rud cynku i ołowiu. Zagrożenia, które wytypowano do analizy, to warunki klimatyczne, wysiłek fizyczny i obciążenie psychosomatyczne, cechujące się ergonomiczną uciążliwością podczas wykonywania czynności roboczych. W wyniku zrealizowanej procedury dla zbadanego stanowiska pracy wskazano zalety i praktyczne możliwości wykorzystania opracowanej metodyki.
EN
The article presents a new, extended approach, compared to the classic occupational risk assessment in mining, giving an example of a comprehensive analysis and assessment of selected hazards at the workplace. The theoretical course of the analysis and assessment was presented in the form of a four-stage algorithm, and the assessment was carried out on the basis of three selected hazards at the operator of drilling and bolting trucks in a zinc and lead ore mine. The hazards that were selected for the analysis are climatic conditions, physical effort and psychosomatic load, characterized by ergonomic nuisance during the performance of work activities. As a result of the implemented procedure, the advantages and practical possibilities of using the developed methodology were indicated for the analyzed workplace.
2
Content available Influence of adhesion on stress-strain condition alongside of a full column resin cartridge rock bolt
Sakhno Ivan, Korzeniowski Waldemar, Sheptak Kateryna, Sakhno Svitlana
Mining Science
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2021
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Vol. 28
233--245
EN
The article highlights the research pertaining to the problem of reinforcement of underground excavations with bolting system, using chemical method based on resin cartridges, which currently is a global trend in mines. Theoretical model of rock bolt installed in a rockmass was discussed and described with proper formulas for explanation the role of single discontinuity and its mechanism affecting stress-strain characteristics of the reinforcement system, based on an adhesive method. The presented model has been verified with results of numerical modelling of stress-strain and deformation composition of the "rock bolt/resin cartridge/rock block" system, depending on the bond coefficient of the mixture which fixes the rock bolt. The analysis of the modelling results showed that for the stress-strain conditions of the rock bolt, too high a bond between the bolt and the rock is dangerous (critical), as it leads to high local tensile and deformation stresses.
3
Content available Fast, non-destructive measurement of roof-bolt loads
Skrzypkowski Krzysztof, Korzeniowski Waldemar, Zagórski Krzysztof, Dominik Ireneusz, Lalik Krzysztof
Studia Geotechnica et Mechanica
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2019
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Vol. 41, nr 2
93--101
EN
This paper discusses the pull-out laboratory tests and the monitoring of expansion-shell bolts with a length of 1.82 m. The bolts comprised the KE-3W expansion shell, a rod with a diameter of 0.0183 m and a profiled, circular plate with a diameter of 0.14 m, and a gauge of 0.006 m. The bolts were installed in a concrete block with a compressive strength of 75 MPa. The tests were conducted on a state-of-the-art test stand owned by the Department of Underground Mining of the AGH University of Science and Technology. The test stand can be used to test roof bolts on a geometric scale of 1:1 under static and rapidly varying loads. Also, the stand is suitable for testing rods measuring 5.5 m in length. The stand has a special feature of providing the ongoing monitoring of bolt load, displacement and deformation. The primary aim of the study was to compare the results recorded by two different measurement systems with the innovative Self-Excited Acoustic System (SAS) for measuring stress variations in roof bolts. In order to use the SAS, a special handle equipped with an accelerometer and exciter mounted to the nut or the upset end of the rod was designed at the Faculties of Mining and Geoengineering and Mechanical Engineering and Robotics of the AGH University of Science and Technology. The SAS can be used for non-destructive evaluation of performance of bolts around mining workings and in tunnels. Through laboratory calibration tests, roof bolt loads can be assessed using the in-situ non-destructive method.
4
Content available Badania i modyfikacje podziemnych technologii górniczych
Korzeniowski Waldemar, Poborska-Młynarska Katarzyna, Rak Zbigniew, Skrzypkowski Krzysztof, Stasica Jerzy
Przegląd Górniczy
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2019
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T. 75, nr 10
21--30
PL
Artykuł wskazuje zakres i obszary zainteresowania tylko wybranych zagadnień naukowo-badawczych zrealizowanych w ostatnich latach przez pracowników Katedry Inżynierii Górniczej i Bezpieczeństwa Pracy, Pracowni Eksploatacji Złóż, podkreślając szczególną rolę i znaczenie ścisłej współpracy naukowców z zakładami górniczymi. Zakres działalności dotyczy kopalń podziemnych wszystkich kopalin eksploatowanych w Polsce i w wielu przypadkach również za granicą. Projekty realizowane są najczęściej na podstawie bezpośredniej współpracy z zainteresowanymi przedstawicielami przemysłu, ale również jako kilkuletnie projekty badawcze finansowane przez państwo i opracowywane w większych konsorcjach. Rezultaty prac znajdują najczęściej bezpośrednie zastosowania i niejednokrotnie stanowią oryginalne, opatentowane rozwiązania techniczne. Szczegółowe rozwiązania przedstawione w artykule można odnaleźć we wcześniejszych publikacjach pracowników dotyczących określonych zagadnień.
EN
The article indicates the scope and areas of interest only for selected scientific and research issues implemented in recent years by the employees of the Department of Mining Engineering and Occupational Safety, the Mining Laboratory, emphasizing the special role and importance of close cooperation between scientists and mining companies. The scope of activity concerns underground mines of all minerals exploited in Poland and in many cases also abroad. Projects are usually implemented on the basis of direct cooperation with interested industry representatives, as well as several years of research projects financed by the State and developed in larger consortia. The results of the work are usually directly applicable and often constitute original, patented technical solutions. Detailed solutions presented in the article can be found in earlier employee publications on specific issues.
5
Content available Study on some solutions for enlarging the application scope of the fully mechanized longwall coal mining technology according to seam dip angle at underground coal mines in Quang Ninh coalfield
Nguyen Duc Trung, Korzeniowski Waldemar, Skrzypkowski Krzysztof, Pham Trung Nguyen
Inżynieria Mineralna
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2019
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R. 21, nr 2/2
28--35
EN
The paper summarizes the applied experience, the technical solutions to limit the adverse effects of slope angle in the mechanized longwall mining at underground mines in the world. The paper proposes some solutions for enlarging the application field of the fully mechanized longwall mining technology according to seam dip angle at underground coal mines belonging to Vinacomin. In the article exploitation methods of coal seams of medium to thick thickness with dip angle above 20° designed for mechanized longwall were presented.
6
Content available Choice of powered roof support FAZOS-15/31-POz for Vang Danh hard coal mine
Skrzypkowski Krzysztof, Korzeniowski Waldemar, Duc Trung Nguyen
Inżynieria Mineralna
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2019
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R. 21, nr 2/2
175--182
EN
The article presents the choice of a Polish powered roof support from FAMUR Group for the conditions of one of the hard coal mines in Vietnam. In the analytical calculations, the strength and structural parameters of the rock mass from the Vang Danh mine region were adopted. The longwall face is 93 m long and the thickness of the coal layer is equal 3 m. For the needs of the choice of support, the load of the longwall face determined and the capacity of the powered roof support were determined. On the basis of the permissible roof deflection method, the condition of excavation maintenance was characterized. In the calculations, it was assumed that the condition of using a powered roof support type FAZOS-15/31-POz, except in addition to complying of the working range and permissible value of longwall face inclination, is to ensure proper roof maintenance conditions, which are determined by the index of load capacity of the roof „g”.
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