Progressive tunnel lining system, in underground coal mining, has a hydraulic ram supported on the runner by a lower section, forming a box structure with the U-shaped runner for increased flexibility
Реферат: The progressive tunnel lining system, e.g. for coal mining, has a base plate on U-shaped runners and at least one hydraulic ram on the runners to support the hanging cap of the lining. The runner has a fitted unit as the lower section of the hydraulic ram, to keep the ram foot at a gap from it. The lower section is a fitted plate over the runner, gripping over its side walls, to give the runner a box structure.
Coordinated action control method for coal mining machine and side protection plate
Номер патента: AU2023202729B1. Автор: Penghui Xu,Zhaosheng Meng,Yunyue XIE,Shaoqi ZHANG,Weikang SONG. Владелец: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY. Дата публикации: 2024-03-14.