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Modernization of gob shield of longwall powered roof support

Piwowar Sonia

Mining Machines

2024

vol. 42, iss. 1

69--78

Longwall powered roof supports have been used to protectmine workings for over 70 years. Their designand especially technological parameters, have evolved significantly. These changes were dictated, on the one hand, by the need to meet the growing functional requirements and, on the other hand, by the increasingly difficult natural operating conditions. Conditions of interaction of the roof supportwith the surrounding rocks, which determine not only operational safety, also impactof the structural form of the roof supportand its assemblies. Powered roof support isan important part of the longwall system, not only separating the working areaof the longwall panelfrom the rocks forming the roof and the caving, but also ensuring the advanceof the longwall systemas the longwall advancesand realization of eachoperation of the technological cycle. Theneed to meet these functional requirements means that technical factors such as: the method of managing the roof of the working, height of the wall, its inclination, the method of mining and the planned advancement of the wall significantly impactsthe structural form and technical parameters of the roof support. The main purpose of this article is to present the method of modernization ofagobshield which is a parta powered longwall roof support.