关键词: 房柱采矿法, 层次分析法, 模糊数学, 出矿方式选择

Abstract: The Ⅳ ore block of Wawu Phosphate Mine is a gently inclined thin medium thick ore body.In the production process,it is difficult to determine the mining method because of the difficulty to draw ore and manage the roof,and the ore body that is not conducive to make full use of the advantages of large self-made equipment.To solve the problem,three mining methods were tested in the mine.It is so difficult to determine the reasonable mining method through simple technical and economic analysis and comparison of advantages and disadvantages.Under this condition,the analytic hierarchy process (AHP) was used to establish the hierarchical structure analysis model with the factors involved in the selection of mining methods as the index system.The weight of each factor was determined according to the basic principle of AHP and the expert scoring system,and then the fuzzy comprehensive evaluation matrix was established according to the determination method of the membership degree of qualitative index and quantitative index to determine the trackless transportation and anchor net roof protection.The room-and-pillar method of wheel drawing was the best mining method in Section Ⅳ of Wawu Phosphate Mine.Practical study showed that the method had good field application effect and applicability in gently inclined thin medium thick ore body,which has certain reference significance for mines with the similar engineering geological conditions.