堆浸过程中矿岩散体粒间孔隙尺寸的演化规律-中南大学学报.PDF

40 6 () Vol.40 No.6 2009 12 Journal of Central South University (Science and Technology) Dec. 2009 1 2, 3 1 1 (1. 100083 2. 410083 3. 410205) X CT MATLAB CT TF18 A 1672−7207(2009)06−1712−06 Pore size evolution of granular ore media during heap leaching 1 2, 3 1 1 SONG Xin , YANG Bao-hua , WU Ai-xiang , WANG Hong-jiang (1. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Resources and Safety Engineering, Central South University, Changsha 410083, China; 3. College of Electrical and Information Engineering, Hunan International Economics University, Changsha 410205, China) Abstract: The pore structure characteristics of granular ore media before and after bacteria heap leaching were detected by X-ray computed tomography. Based on MATLAB software, the cross sectional and longitudinal pore size distributions of granular ore media were calculated to investigate the evolution of granular ore media’s pore size distribution during heap leaching and its influences on permeability. The results show that intergranular pores are inhomogeneous. The pore size ranges widely and assumes a no