E3S Web Conf.
Volume 29, 2018XVIIth Conference of PhD Students and Young Scientists
|Number of page(s)||7|
|Published online||31 January 2018|
Analysis characteristics determination of electrohydraulic control system operation to reduce the operation time of a powered roof support
Center of Hydraulics DOH Ltd, 147 Konstytucji St., 41-906 Bytom, Poland
* Corresponding author: firstname.lastname@example.org
The article discusses basic functions of a powered roof support in a longwall unit. The support function is to provide safety by protecting mine workings against uncontrolled falling of rocks. The subject of the research includes the measures to shorten the time of roof support shifting. The roof support is adapted to transfer, in hazard conditions of rock mass tremors, dynamic loads caused by mining exploitation. The article presents preliminary research results on the time reduction of the unit advance to increase the extraction process and thus reduce operating costs. Conducted stand tests showed the ability to increase the flow for 3/2-way valve cartridges. The level of fluid flowing through the cartridges is adequate to control individual actuators.
© The Authors, published by EDP Sciences, 2018
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. (http://creativecommons.org/licenses/by/4.0/).
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