Papers and articles presenting the results of the project
1. Monitoring the operational parameters of a power roof suport
Title: Monitoring the operational parameters of a power roof suport.
Authors: D. Jasiulek
Language: English
Year: 2018
Place of publication/journal: Problemy Eksploatacji (2018). nr 2, s. 109-115.Conference Inżynieria Przyszłości 2018, 10–11.05.2018 r.
Abstract: Safety aspects of mining personnel as well as safety of the coal mining processes are presented. Mechanised longwall system is commonly used in coal mining industry. The system consists of the basic machinery such as a shear loader, an armoured face conveyor and a powered roof support, which protects the roof of workings. Powered roof support consists of hydraulically or electro-hydraulically controlled units, equipped with pressure sensors placed in different parts of the hydraulic system and displacement sensors for the selected actuators. Projects related to the automation of roof support operation and monitoring of its parameters are currently undertaken.
Analysis of available solutions concerning the controlling and monitoring the roof support, with special regard to pressure measurement in a prop and roof support geometry measurement is presented. Existing solutions are described and KOMAG development directions for parameter monitoring systems of roof support operation in terms of personnel and technical safety are indicated. The paper discusses work realised within the framework of PRASS III “Productivity and safety of shield support” project, co-financed by Research Fund for Coal and Steel (RFCS).
2. Productivity and safety of shield suport – PRASS III
Title: Monitoring the operational parameters of a power roof suport.
Authors: D. Jasiulek, J. Lubryka, S. Bartoszek
Language: PL
Year: 2019
Place of publication/journal: Conference KOMTECH 2018. Szczyrk, Poland, 24-26 września 2018r. Maszyny Górnicze 1/2019
Abstract: Objectives of PRASS III „Productivity and safety of shield support” research project realized by KOMAG in the international consortium co-financed by the Research Fund for Coal and Steel are presented. PRASS III project concerns the aspects of cooperation of a shield support with rock mass regarding the safety of mine crew as well as technical safety. Hard coal mining is most frequently realized with use of powered longwall system consisting of the main machine such as longwall shearer, AFC and the shield support protecting the roadway roof.
Link to online version: http://komag.eu/images/maszynygornicze1/2019/MG1-2019.pdf
3. Longwall Control
Authors: Ulrich Langosch, Thomas Geldmacher, Axel Studeny, Renè Oberhaus.
Language: DE
Year: 2020
Place of publication/journal: Conference KOMTECH 2018. Szczyrk, Poland, 24-26 września 2018r. Maszyny Górnicze 1/2019
Abstract: Recommendation for operational advice and training
The increase in knowledge by the PRASS III research project has changed DMT’s strategy for the planning and dimensioning of longwalls. This document comprehensively describes the resulting procedure for operational consultation. It has the function as a recommendation for the staff as to which way to go when dealing with issues, can be used as a basic for trainings and clarifies the solu-tion strategy for the client. For this purpose, the document can be translated into the national lan-guage if required. It is also a base for a brochure for consultion business.
4. Difficulties in operating the powered roof support, observed during work in the lower range of its working height
Title: Difficulties in operating the powered roof support, observed during work in the lower range of its working height
Authors: Płonka M., Rajwa S.
Language: EN
Year: 2018
Place of publication/journal: MINING – Informatics, Automation and Electrical Engineering
Abstract:
Significant maintenance difficulties have recently been observed in terms of the proper maintenance of mining roofs during the operation of powered roof supports in their low section height range, which is characterized by a wide working range. These difficulties were also encountered in situations where the calculated load capacity index of the roof “g” reached favorable values. These phenomena occurred most often during extraction under gobs and when maintaining a protective roof carbon shelf of the required thickness. This paper presents the calculations and analyses aimed at clarifying and discussing these events.
Link to online version: http://www.miag.agh.edu.pl/nr-4-2018-536/
5. Identyfikowanie nieprawidłowości w prowadzeniu obudowy zmechanizowanej na podstawie obserwacji ciśnienia stojaków i geometrii sekcji
Title: Identyfikowanie nieprawidłowości w prowadzeniu obudowy zmechanizowanej na podstawie obserwacji ciśnienia stojaków i geometrii sekcji
Authors: Marek Płonka, Andrzej Walentej
Language: PL
Year: 2020
Place of publication/journal: Monograph: MECHANIZACJA, AUTOMATYZACJA, ROBOTYZACJA W GÓRNICTWIE 2020
Abstract: Powered supports, especially their mechanical and hydraulic systems are eonstantfy being developed. Recently, sżgnificant changes regarding eleetronże equżpment ean also be seen. It comes not only an indispensable element ensuring more effieient eontroi o.f the powered support but also in combination with other elements ojthe longwall system allows to obtain new possibilities andjunetionalities. They depend on t he measurements and reeording of many working parameter of the longwall complex. Various forms oj monitoring and observation of equipment in real time or with a short time delay. There is a possibility ofwarning and indieating dangerous operating conditions of a powered support. For t his pur p os e, specific changes in the monitored parameters mus t be analyzed and identified and injormation intended for the operator generated on this basis. Currently, the most advanced systems used in the g/obal mining industry are also equipped with the function oj automalic generation oj warnings about possible future threats. lt is intended that they should allow for a protective measures in a timely manner. Creating a system with hazard prediction functions requires prior gathering, and then analyzing a representative measurement database along with observations oj difficulties in usżng oj a powered support, and especially with strżctly emergency events, such as rooffall, reductżon ofthe cross-section ofthe longwali, etc. To this end, it is necessary to search analyticalfy for Links between t he data from monitoring with events that cause threats. These threats also depend on the geologżcal and minżng situation C?f a partieu/ar mining panel.
6. Shield Support Monitoring System – operation during the support setting
Title: Shield Support Monitoring System – operation during the support setting
Authors: Dariusz Jasiulek, Sławomir Bartoszek, Karel Perůtka, Aleksandr Korshunov, Jerzy Jagoda, Marek Płonka
Language: EN
Year: 2019
Place of publication/journal: Acta Montanistica Slovaca Volume 24 (2019), number 4, 391-401
Abstract: The paper presents the results of testing the geometry measurement system of powered roof support using inclinometers that meet the requirements of the ATEX directive. Mechanized longwall system is most often used for coal mining. The longwall system includes basic machines, such as a longwall shearer, AFC and powered roof support that protects the roof. The powered roof support consists of the units that are hydraulically or electro-hydraulically controlled and are equipped with pressure sensors in the selected places of the hydraulic system and displacement sensors for selected actuators. One of the challenges associated with controlling and monitoring the parameters of the powered roof support is the mapping of its geometry and arrangement of individual components. KOMAG Institute of Mining Technology designed and manufactured the geometry monitoring system based on inclinometers that meet the requirements of the ATEX Directive. The system was tested on a real object in the laboratory. Impact of the structure of the powered roof support on the accuracy of geometry measurement and mapping was determined based on the test results. The results of the tests will be used during the implementation of the system in real conditions.
Link to online version: https://actamont.tuke.sk/pdf/2019/n4/10jasiulek.pdf
7. The simulation of fluid flow in safety elements of longwall shield support hydraulic legs
Title: The simulation of fluid flow in safety elements of longwall shield support hydraulic legs
Authors: Janina Świątek, Sylwester Rajwa, Marek Płonka
Language: EN
Year: 2019
Place of publication/journal: IOP Conference Series: Materials Science and Engineering
Abstract: The paper presents the research on pressure variation in elements securing the shield support against overloading. The chosen constructions of connecting pipe were analysed and its flow characteristic were determined. The operational parameters of different connections were also considered in light of their interaction with whole hydraulic control system. The results allowed to determine of the optimal connecting pipe curve with regard to the pressure in whole pressure safety system.
Link to online version: https://iopscience.iop.org/article/10.1088/1757-899X/679/1/012017
8. Monitoring the operational parameters of a power roof suport
Title: Monitoring of the mining powered roof support geometry.
Authors: D. Jasiulek
Language: English
Year: 2019
Place of publication/journal: Journal of Machine Construction and Maintenance-Problemy Eksploatacji 2019 | no. 3 | 73—79
Abstract: The paper presents the results of research on the geometry measurement system of a powered roof support using inclinometers that meet the requirements of the ATEX directive. Coal mining is most often carried out using a mechanized longwall system. The longwall system includes basic machines, such as a longwall shearer, a longwall conveyor, and a powered roof support that secures the roof of the excavation. The powered roof support consists of sections that are hydraulically or electro-hydraulically controlled and are equipped with pressure sensors in selected places of the hydraulic system and displacement sensors for selected actuators. One of the challenges associated with controlling and monitoring the parameters of the powered roof support section is the mapping of its geometry and mutual arrangement of individual components. KOMAG Institute of Mining Technology has designed and made a geometry monitoring system based on inclinometers that meet the requirements of the ATEX directive. System tests were carried out on a real object in laboratory conditions. As a result of the research, the influence of the structure of the powered roof support on the accuracy of geometry measurement and mapping was determined. The results of the tests will be used during the implementation of the system in real conditions.