堆浸饱和多孔介质有效应力初探  

Preliminary Study on Effective Stress of Fluid-saturated Porous Medium in Heap Leaching

作　　者：薛振林 刘志义 张有志 孙光华 

机构地区：[1]华北理工大学矿业工程学院,河北唐山市063000

出　　处：《矿业研究与开发》2018年第1期20-23,共4页Mining Research and Development

基　　金：国家自然科学基金资助项目(51374035);河北省自然科学基金项目(E2016209277)

摘　　要：为了阐明堆浸饱和条件下多孔介质的复杂应力问题,将有效应力理论引入堆浸体系,分析了堆内有效应力的基本原理,双重有效应力理论在堆浸的适用性以及堆浸双重介质有效应力理论的物理意义,并结合浸出实际修正了堆浸双重介质有效应力理论。研究表明:堆浸多孔介质有效应力理论能够简化堆浸体系的应力问题,揭示总应力σ0、有效应力σ与孔隙水压力Pp之间的关系;双重有效应力理论自身推导过程存在问题,并不适合于堆浸体系;堆浸双重介质有效应力理论修正后综合考虑上覆矿石、基质水压力与矿石裂隙演化,更有效的描述了堆浸应力问题,为流固耦合的研究奠定了理论基础。In order to illustrate the complex stress problems of fluid-saturated porous medium in heap leaching, the ettectlve stress theory was applied to heap leaching system. The basic principle of effective stress in the heap was analyzed, as well as the the applicability of the dual effective stress theory in heap leaching and the physical meaning of heap-leaching dual medium effective stress theory. And based on the leaching situation, the heap-leaching dual medium effective stress theory was corrected. The research showed that the heap-leaching dual medium effective stress theory could simplify the stress problems of heap leaching system, and illustrate the relationship among total stress , effective stress and pore water pressure . But the dual effective stress theory was not suitable for heap leaching system as its defects in the derivation process. The corrected heap-leac- hing dual medium effective stress theory could describe the stress problems of leaching more effectively through comprehensive- ly considering the overlying strata, the matrix water pressure and the crack evolution of ores, which laid the foundation for the research of fluid-structure interaction.

关 键 词：堆浸 有效应力 双重介质 流固耦合 

分 类 号：TD315[矿业工程—矿井建设]