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层间 渗入型铀矿床不同的现代水文地质环境对采用地浸方法采矿过程中保护环境不受污染的程度不同。根据水文地质特征 ,特别是水动力指标可将铀矿床分为有利的、不利的和非常不利的 3类 :有利的铀矿床指矿区的水流从矿带两侧分别从氧化带和原生灰色岩石带以斜交形式向矿带方向流动 ,并沿矿带走向方向相互作用。这样的水文地质条件下工艺溶液不可能流到矿带范围以外 ,故环境将不受污染。完全不利的水文地质条件是指水流垂直穿透矿带从氧化带向原生灰色岩石带流动 ,它们能将有毒元素和重金属带到矿带以外的相邻地区。不利的水文地质条件是指同时具有上述两种特征的铀矿床。实践证明 ,水文地质条件有利于地浸方法开采和有关工艺流程时 ,开采工作对现场造成的污染要比天然放射性污染低。
Different modern hydrogeological environments of intergranular infiltration uranium deposits have different degrees of protection from environmental pollution during the mining process using in situ leaching. According to the hydrogeological features, especially hydrodynamic indicators, uranium deposits can be classified into three favorable, unfavorable and very unfavorable categories: favorable uranium deposits refer to the water flow in the mining area from the two sides of the ore belt, respectively from the oxidation belt and the primary gray rock belt It flows obliquely to the ore belt and interacts along the direction of the ore belt. Under such hydrogeological conditions, the process solution can not flow beyond the scope of the ore belt, so the environment will not be contaminated. Completely unfavorable hydrogeological conditions mean that the water flows vertically through the ore belt from the oxidation zone to the primary gray rock zone, which can carry toxic elements and heavy metals to adjacent areas beyond the ore zone. Unfavorable hydrogeological conditions refer to uranium deposits that have both of these characteristics. Practice has proved that the hydrogeological conditions are conducive to the leaching method mining and related process, the mining work on the scene caused by pollution than natural radioactive pollution is low.