【摘要】 通过在研究区开展工作,查明该备选场址地质情况,分析核素迁移介质的渗透性等参数,初步评价某极低放废物填埋场备选场址的稳定性。该备选场址岩性主要有分为三层:①表层为粘土夹碎块;②中部为卵砾石漂砾层;③下部为志留系板岩。该区域内山区为地下水补给区,山前台地为径流区,河流为排泄区;第四系分布厚度大,可达31.5 m,是含水层,地下水埋深为4.26 m~9.38 m,主要为第四系松散堆积物孔隙水,渗透系数总体较小,为0.487 m/d~2.05 m/d;地下水的化学类型为重碳酸钙型。因此,该地区作为备选场址,属于稳定性地区。更多还原

【Abstract】 The paper present that the authors find out the geology of this standby location,analyzed permeability of nuclide migration media,then preliminarily evaluates the stability of standby site of burying field to some very low level waste by the works in the study area.The work area can be mainly divided into three layers in lithology in this standby location: the surface layer is fragments of clay,the central layer is boulder to gravel and the bottom layer is Silurian slate.The mountain area,the mesa of the mountain and the river in this area are the groundwater replenishment-region,runoff area and the drainage area separately.The distributing thickness of Quaternary up to 31.5 m is great,as the aquifer.The permeability coefficient of groundwater is small and the groundwater mainly belongs to the calcium bicarbonate Chemical type and mainly consist of Quaternary loose soil pore water,about 0.487 m/d~2.05 m/d,and the depth of groundwater level is about 4.26 m~9.38 m.Therefore,the standby site can be considered as the stable region.更多还原