Bezpieczeństwo Pracy i Ochrona Środowiska w Górnictwie Number 09/2023

The process of designing a longwall powered support is extremely complex and requires many operations related to the creation of a complete machine. The powered support section is one of the basic elements of the longwall system. The implementation of the support that meets the guidelines of the manufacturer and user, requires an endurance analysis at the design stage conducted according to the regulations in force. The main objective of the research was to perform the analysis of the ultimate strength of selected elements of the designed powered support section. The research was carried out with the use of special software that uses the finite element method. The article presents the analysis of the strength limits done with the help of the finite element method, determining the strength of selected elements of the longwall support section. The solutions proposed included changes in the structure and properties of the material in the design process. The aim of the proposed solution was to obtain a model with strength value that meets safety standards. The research results are a valuable source of knowledge for designers. Solutions of this type set examples for spatial models of the longwall support section being designed nowadays. The analysis presented in the article, together with the results of the research and the conclusions resulting from them, may improve the safety and effectiveness of powered supports.

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40 years of mining it is for LW „Bogdanka” S.A. a time of intensive development of the most interesting of the underground transport systems, which is transport using belt conveyors. The article presents the elements of the transport system, the implementation of which had an impact on its functionality and efficiency, so that it is now possible to use underground devices that ensure transport capacity of up to 4300 t/h of excavated material in main haulage lines and the ability to separate gangue from excavated material in the transport process carried out under up to 3000 tonnes per day. Exploitation of more and more distant resources is an impulse to expand and improve the system. The prospects for the future include the expansion of the belt conveyor system enabling the transport of the crew to work places and the development of the transport management system by an operator located on the ground.