Research on key technology of 50t coal skip for vertical shaft of coal mining

In order to meet requirement of 50 t skip used in large mining vertical shaft hoisting system,key technology of 50 t skip in manufacture process was researc hed. Based on utilization rate of shaft section and material flowability in skip,calculation method of skip section size and height was proposed,and also strength of skip was analyzed by finite element analysis method,the maximum stress appeared in lower side of the skip. The gate open resistance and guide rail impact load were calculated by the dynamic formulae,which could be provided for designer as reference. The section size( 3.37 m x 1. 15 m),height( 23. 2 m) and effective volume( 58 m3) were designed based on the working condition of mine,and also prototype machine manufacture of 50 t skip was finished.