期刊论文

中文

世界核地质科学

1672-0636

2022

38

3

527-536

国家自然科学基金项目“原地浸出采铀物理化学渗流机理与渗漏范围预控”(编号:11775107)资助。

本校为第一机构

渗透率是影响溶浸采铀过程中含矿层铀浸出率的关键因素,准确评判含矿层渗透性对原地浸出采铀过程中井场参数的优化设计具有重要意义。文章采用核磁共振技术结合分形理论,分析了新疆阿克苏地区含铀泥砂岩孔隙结构分形特征,并研究了分形维数与渗透率之间的相关关系,建立了渗透率预测的多重分形模型。结果表明,该含铀泥砂岩以微孔和小孔为主,较大孔隙对渗透率具有显著影响;孔隙结构具有双重分形特征,较小孔隙分形维数介于0.727~1.711之间,较大孔隙分形维数介于2.961~2.989之间。核磁共振T;谱分形拐点可以作为确定T;截止值的依据,该方法比离心法更加高效便捷;根据T;截止值计算可移动孔隙度,并结合分...

Permeability is a key factor affecting the uranium leaching rate of the ore-bearing layer in leaching uranium.Accurately evaluating the permeability of the ore-bearing layer is of great significance to the optimization design of well field parameters in the process of in-situ leaching of uranium.In order to quantitatively characterize the pore structure of muddy sandstone uranium ore and establish its permeability prediction method.This paper uses nuclear magnetic resonance technology(NMR)combined with fractal theory to analyze the correlation between the pore structure fractal characteristics...