Abstract
A mechanical support in a longwall complex requires proper supervision and control of operating parameters because it is responsible for the safety of machines and workers. Its main functions are to protect the excavation against the adverse effects of rock mass and to move it along with the operational progress of the shearer and the scraper conveyor. In the era of Industry 4.0 as well as green economy and sustainable development, the development of machines and devices included in the longwall complex is an important area of invention. When it comes to the mechanical support included in the longwall complex, the authors propose changes to the hydraulic control system. The main purpose of the work was to develop a system that can automatically expand the legs of the powered support. Tests were carried out under real conditions while equipping the support section with a prototypical hydraulic system and with a system monitoring the correct operation of the prototype. This article presents the development of a prototypical installation under real conditions for testing on a longwall. The innovative solution proposed by the authors consisted of introducing a prototypical double valve block into the hydraulic system of the housing, which enables the function of automatic section expansion. The authors proposed a solution aimed at shortening the work time of the powered-support-section operator. The research results made it possible to evaluate the usefulness of the proposed solution. This type of solution can be considered technical support in the process of coal mining in an underground mine. Analysis presented in this paper, along with results from research conducted and its conclusions, can be of practical help to enclosure users to improve reliability and achieve optimal performance.
Highlights
Continuous technological progress and economic development in the era of the fourth industrial revolution, referred to as Industry 4.0, require companies to constantly change and implement innovative technical solutions [1–3]
The tests were carried out in a longwall, where an automatic-expansion system was installed in the3p. oRweseureltds support section
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Summary
Continuous technological progress and economic development in the era of the fourth industrial revolution, referred to as Industry 4.0, require companies to constantly change and implement innovative technical solutions [1–3]. This issue applies to the mining industry of solid, liquid and gaseous minerals, which is expected to intensify production while minimizing negative impacts on the environment [4–6]. This determines the conduct of research and the search for new solutions—both in terms of improving the reliability of machines [7–10] and optimizing production processes [11–17] as well as improving work safety [18–22] and caring for the environment [23]. SSeeccttiioonn ooff tthhee ppoowweerreedd rrooooffssuuppppoorrtt:: 1, canopy; 2, shield support; 3, lemniscate tie rods; 4, lleegg;;55,,flfloooorrbbaassee;;66,,sshhiiffttiinnggssyysstteemm
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