Research on the Calculation Method of Acting Forces on Four-Corner Guide Rails in Shafts

In order to enhance the stability of the coal mine shaft lifting vessel, the structural form of four-corner guide rails is often used to replace the interrupted part of the end tank passage. However, the current design method of four-corner guide rails is based on the design method of the end tank passage. However, due to the great differences in the structural forms and constraints between four-corner guide rails and the end tank passage, the reliability of the force of four-corner guide rails calculated by referring to the design method of the end tank passage is doubtful. In order to solve this problem, the acceleration time history curve of the four-corner guide rails under loading and unloading conditions is obtained through the field test of the force of the four-corner guide rails. By analyzing the time-history curve, the force of the four-corner guide rails is determined, and its characteristics and influencing factors are proved. After further regression analysis, the calculation method of horizontal force and vertical force of four-corner guide rails of coal mine shaft is established considering the lifting terminal load level. The calculation method based on the field test results is reliable and has important significance for improving the stability, safety and economy of the four-corner guide rails.