Analysis of the Pressure Increase in the Hydraulic Cylinder of the Longwall Powered Roof Support during Use

This paper presents the results of lab-simulated tests on longwall powered supports under dynamic loading conditions. The were carried out a test site, where tested prop was subjected to load using controlled mass falling gravity onto support. support therefore determined based weight used and distance freefall before impact. operating characteristics valve determined, specifying temporary changes in pressure prop’s yield rate total deformation. research aimed determine operational parameters be new improved components for roof supports. One most essential elements hydraulic system is safety valve. confirm validity concept possibility applying developed control forged has been designed significantly improve efficiency support, especially conditions hazards.