Abstract: In view that the selection of mining method is a systematic issue, gray and hierarchical systematic analysis theory is applied to build a gray hierarchical comprehensive evaluation model for the optimization selection of mining method which considers the safety performance, environment protection and technical performance, and uses the hierarchical method to determine the weight of every factor, the gray relation analysis method to determine the grey incidence degree of evaluation factors and the evaluation mode to determine the best to worst sequence of mining methods. The method was used for selecting the mining method for Huangjindong Gold Mine and as a result, pillarless upward dry-filling stoping method was selected. The practice shows that the application of this method can achieve good economic benefit and environmental protection effect, and can greatly improve the safety of operating workers, demonstrating that the optimization selection of mining method using gray hierarchical theory has advantages of reliable evaluation results and strong adaptability.

Key words: Mining method, Gray hierarchical comprehensive analysis, Optimization selection