Longwall shearers operating in the underground mine workings move along longwall face conveyor troughs. The haulage system, which is made up of two kinematic pairs form track wheels installed shearer movers, cooperating with toothed route built conveyor’s throughs, responsible for moving shearer. currently used solutions shearers’ systems do not ensure proper cooperation segments, results failu...

Under the guidance of green mining and scientific ideas, strata movement its control have achieved a series research developments in China. Based on summary achievements related to characteristics, influences activity surface environment, utilizing controlling methods, critical problems that need be solved are identified for study control. Mining activities will cause redistribution stress. The...

Abstract The paper presents a method for measuring and recording the forces involved in coal cutting process. Moreover, visualization of all process was described. In following part, construction principle operation device determination (coal mining), referred to by author as POU-BW/01-WAP, are presented. Resistance extensometry used measure forces. This is only world that determines two three ...

Abstract The powered roof support is one of the essential elements technical equipment longwall. It responsible for safety machines and workers. In addition, its function to move entire wall complex along operational progress combine. Choosing proper per conditions prevailing in an important factor safe effective operation. aim study was assess mining geological Polish hard coal mines terms ope...