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- W2951007275 abstract "The article discusses a case of security hazard in a longwall equipped with a properly selected chock shield support with two legs, technically efficient, introduced to the market and for operation in compliance with the requirements covering Polish hard coal mining. As a cause of the hazard an accidental coincidence was indicated, such as the occurrence of a tremor at an area with unfavourable geometry for the operation of the support section and leg (including the shift of the double-telescopic leg from the 1st to the 2nd hydraulic stage) at the time of the mining process. Immediate safety measures were applied successfully. They were aimed at minimizing the conditions dangerous to the crew. The section was withdrawn and spragged again. As a result, the leg operated in full extension mode of the 1st hydraulic stage, obtaining the required strength and geometry of the section and leg. The presented case study will be additionally supplemented in the future with selected analytical and bench tests." @default.
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- W2951007275 date "2019-01-01" @default.
- W2951007275 modified "2023-10-14" @default.
- W2951007275 title "Case Analysis of Damages to Control Hydraulics of the Leg in the Powered Roof Support Section" @default.
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- W2951007275 doi "https://doi.org/10.1051/e3sconf/201910503013" @default.
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