E3S Web Conf.
Volume 134, 2019The First Interregional Conference “Sustainable Development of Eurasian Mining Regions (SDEMR-2019)”
|Number of page(s)||8|
|Section||Development of Geotechnology|
|Published online||28 November 2019|
Bench tests of a support system of a powered roof support’s hydraulic leg aimed at minimizing consequences of leaks
Polska Grupa Górnicza S.A., KWK ROW Ruch Chwałowice, ul. Przewozowa 4, 44-206 Rybnik, Poland
2 Silesian University of Technology, Faculty of Organization and Management, Roosevelta 26, 41-800 Zabrze, Poland
3 DOH Hydraulics Center, ul. Konstytucji 147, 41-906 Bytom, Poland
* Corresponding author: firstname.lastname@example.org
Effectiveness of a powered roof support significantly impacts on the efficiency and safety of a mining process. The main element of the support is a hydraulic leg which transfers loads imposed by the rock mass. One of the basic issues occurring during the extraction process are internal and external leaks of hydraulic systems. A new support system was designed to limit and later eliminate the consequences of such leaks. Its main component is a valve block equipped with two independent check valves. This solution allows to maintain high pressure in both chambers of a leg despite leaks. The article discusses the developed solution and presents preliminary results of bench tests of a leg equipped with the new block and loaded dynamically. The results are promising, and the tested block fulfils its task by maintaining the working pressure in the leg during load.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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