基于AHP的离子型稀土资源采选综合回收影响因素分析

AHP-based Analysis for Influencing Factors of Comprehensive Recovery of Ion-type Rare Earth Resources through Mining and Beneficiation Method

针对南方离子型稀土原地浸矿开采工艺流程,从稀土离子浸出、母液集液与母液处理回收3个环节入手,建立了稀土资源采选综合回收影响因素评价体系,列出了8个准则层因素,细化出27个指标层因素。采用层次分析法进行了定量化分析,得出主要影响因素为隔水底板岩体节理裂隙特征、浸矿注液顺序、底板与地下(潜)水相对位置关系、地下(潜)水补给径流和排泄、集液方式、集液底板工程与渗透性能。有针对性地提出了对策,包括加强生产勘探、注重基础试验研究及优化开采方法与工艺技术等。

The in-situ leach mining process was adopted for the ion-type rare earth in South China. An influencing factor evaluation system for comprehensive recovery of rare earth resources through mining and beneficiation was established in respect of rare earth ions leaching, mother liquor collecting and recycling. The evaluation system included eight factors at criteria layer, which were subdivided into 27 factors as indicators. Based on the quantitative analysis with analytic hierarchy process （AHP） , it was found that key influencing factors included joint fracture features in rock mass of water-resisting floor, leach liquid injection sequence, relative relations between positions of floor and groundwater （phreatic water）, the supply, runoff and drainage of ground water （phreatic water）, liquid collection method, liquid collection floor project, and the permeability. Some targeted countermeasures were put forward, including intensifying productive prospecting, foeusing on basic experimental research, ootimizing mining method and process technique.