Abstract: In order to scientifically identify the restrictive factors of mine hoisting transportation sys⁃ tem, targeted system optimization is carried out. Taking a lead-zinc mine as the research background, com⁃ bined with the actual production of the mine, the expert meeting method was used to analyze and construct a multi-level index system of influencing factors of the hoisting system. On this basis, the decision-making experiment and evaluation laboratory method are introduced into the identification of key restrictive factors of the lifting transportation system for the first time. By establishing the direct influence matrix and the com⁃ prehensive influence matrix, the influence degree, the affected degree, the centrality and the reason degree of each index factor are calculated, and the causality diagram is drawn according to the calculation results. The research shows that low efficiency of multi-level lifting, low degree of mechanization, low efficiency of middle transportation and lack of unified design are the key restrictive factors of the mine hoisting system. Finally, the optimization measures of transportation system are put forward, and satisfactory application re⁃ sults are obtained.

Key words: hoisting transportation system, decision experiment and evaluation laboratory method, ex? pert meeting, system optimization