洪海沟铀矿床地浸开采水文地质条件研究

Study on hydrological geology conditions of in-situ leaching of uranium deposits in Honghaigou

通过水文地质条件和地下水水化学特征研究发现,洪海沟铀矿床各含矿含水层的渗透系数为0.31~1.13 m/d,矿层渗透性大于或接近围岩的渗透性;含矿含水层承压性较强,单位涌水量较大;含矿含水层地下水矿化度一般在0.19~1.34 g/L;地下水pH值接近于中性,在7.20~8.88,具有氧化-还原电位很容易被改变等特点。因此,该矿床适宜用酸性和CO-_2地浸法开采。

The hydrogeological conditions and the chemical characteristics of the groundwater in uranium deposit of Honghaigou Groove were studied. It is concluded that the permeability coefficient of various aquifers is from 0.31 to 1.13 m/d,the permeability coefficient of ore-bearing layer is greater than or close to surrounding rocks; pressure-bearing capacities of aquifers is high, the amount of unit inflow is large; the mineralization of groundwater is generally between 0.19 and 1.34 g/L;the pH value of groundwater is about neutral, which is from 7.20 to 8.88, and oxidation/reduction potential（Eh） can be easily changed. So, the deposit is suitable for the acid and CO_2 leaching mining.