Optimization model of coal mine roadway layout system based on evidence theory and its application

China's coal mine roadway layout systems are complicated, multi-production and poor matching. And thus affect the overall effectiveness of the coal production logistics system. Although the research content on coal mine logistics system at home and abroad are many, however, research on the optimization method of coal mine roadway layout system are very few. In this paper, we did an in-depth analysis on coal mine roadway layout system, established an optimization factors system of coal mine roadway layout system, and determined the relative weight of the influencing factors at each levels using analytic hierarchy process to according to experts' advices. At the same time, by introducing D-S evidence theory in this article, we established optimization model of coal mine roadway layout system and described its application process through empirical analysis. Finally, the results of the discussion can provide the optimization and transform of coal mine roadway layout systems in practice with a theoretical basis.