为了更好地开展南方离子型稀土矿山损毁土地的复垦工作,依据土地复垦方案编制规程要求,以某离子型稀土矿山为例,介绍了该类型矿山土地损毁的特点,总结了复垦时序、表土资源剥离和堆存、原地浸矿采场集排水工程、风险金等复垦工程设计特点,并对已损毁土地不同复垦措施进行对比。可以看出,离子型稀土矿山土地复垦方案主要包括拟损毁土地和已损毁土地2大部分。拟损毁土地方面,应结合原地浸矿工艺特点,考虑采场母液渗漏对植物根系和地下水的影响,重视采场集排水工程的修建,增加风险金的提取;已损毁土地方面,应结合矿区废弃地现状,重视已损毁土地损毁特点、程度、面积、立地条件等调查工作。
In order to better conduct the land reclamation plan of ionic rare-earth mine in Southern China,characteristics of land destruction was introduced based on the land reclamation plan on compiling regulation. Taking an ionic rare-earth mine as a case, the land destruction of this type of mine was introduced, and the design characteristics in reclamation time sequence, overburden stripping and stockpiling, in-situ leaching mining stope drainage engineering, risk fee, etc were summarized, com- parison between different reclamation method was conducted. It can be concluded that ionic rare~earth reclamation includes two areas:land that will be destroyed and that have already been destroyed. For land that will be destroyed, influence of leaching solution leaking on plant roots and groundwater was considered combined with in-situ leaching characteristics, and Water collec- ting and drainage system and extracting risk fund should be emphasized; For land that have already been destroyed, investiga- tion on characteristics, degree, size and site condition of land being damaged should be made, combining with the current situa- tion of abandoned mining area.