A Discussion of the Design of Cage Shaft Using Tower Friction Hoists
In order to improve the design level of cage shaft,reduce safety accidents and improve the operation efficiency of the system,the paper puts forward some specific design recommendations for cage shaft hoisting system,shaft tower and shaft body using tower friction hoists by summarizing the design experience and combining with the current national standards and codes.In the design of hoisting system,it is recommended to use permanent magnet motor to improve the operation efficiency and stability,adopt over-wind buffer equipment with cage chair to improve safety,add the head-rope online detection system to detect the head-rope status in real time,and provide rope changing equipment to facilitate the subsequent rope changing operation.As for the design of the shaft tower,it is recommended to install an external sightseeing elevator to enhance the image of the shaft tower,remove the beams on the cage access to facilitate the replacement of cages and materials arrival/leaving,set up a double-layer platform for entering and exiting the cages to improve the operation efficiency,and adopt the overhanging structure to reduce the floor space of the shaft tower.In terms of shaft body design,it is recommended to use upper hydraulically tensioned wire rope cage passages to reduce installation and maintenance effort,and use a small cage hoisting system instead of ladder room to enhance the escape passage function.The results of the study show that these design recommendations can effectively improve the safety and operation efficiency of cage shaft,reduce the subsequent maintenance costs,and have important guiding significance for the design of cage shaft in underground mining.