CAJ | 학술논문

溶浸范围是铀矿地浸开采经济技术评价的重要考量要素之一。由于溶浸过程发生在地下矿层，溶浸范围的确定往往比较困难。本文以我国某砂岩铀矿地浸单元为例，根据研究区水文地质条件和实际地浸抽注液流量数据，运用地下水模拟软件Visual Modflow 粒子示踪技术对溶浸液渗流路径和范围进行了模拟，模拟结果的示踪迹线指示出了溶浸液从注液孔进入矿层后的不同渗流方向、速度及运移路径，沿该迹线的溶浸液流量有所不同，对抽液总流量的贡献率也不同。按贡献率大小从低到高剔除占总贡献率5％的那些低效率的迹线，保留占总贡献率95％的迹线，以此圈定了该地浸条件下的有效溶浸范围，计算得出有效溶浸面积是钻孔所围几何面积的1．51倍。
용침범위시유광지침개채경제기술평개적중요고량요소지일。유우용침과정발생재지하광층，용침범위적학정왕왕비교곤난。본문이아국모사암유광지침단원위례，근거연구구수문지질조건화실제지침추주액류량수거，운용지하수모의연건Visual Modflow 입자시종기술대용침액삼류로경화범위진행료모의，모의결과적시종적선지시출료용침액종주액공진입광층후적불동삼류방향、속도급운이로경，연해적선적용침액류량유소불동，대추액총류량적공헌솔야불동。안공헌솔대소종저도고척제점총공헌솔5％적나사저효솔적적선，보류점총공헌솔95％적적선，이차권정료해지침조건하적유효용침범위，계산득출유효용침면적시찬공소위궤하면적적1．51배。
Leaching area is one of the important factors that must be considered in economic and technical evaluation of in‐situ leaching of uranium .Because the leaching process is taken place in the ore bed underground ,it is difficult to determine the leaching area .In this paper ,based on study of the in‐situ leaching process of a mining unit at a sandstone type uranium deposit in northwest China ,a new method for leaching area calculation by using particle tracer technique which is employed in Modpath as a model integrated in Visual Modflow was explored .According to the hydrogeological conditions and leaching flux data ,lixiviant flow was simulated by using Visual Modlfow and the flow distribution was showed by the tracer paths , which gave us information about the flow directions ,velocities and paths of lixiviant .Different path had different contribution to the total extraction flux ,so ,the contribution of each path had been calculated and ordered from low to high ,and the lowers of which cumulative contribution ratio achieved 5% were wiped off ,thus ,the leaching area was determined by the highers of 95% .According to this method ,the calculated leaching area was 1 .51 times to geometric area of enclosure of mining wells .