上游法筑坝尾矿沉积规律及固结情况预测  

Prediction of sedimentation patterns and consolidation of tailings from upstream method damming

作　　者：唐萍雨 眭素刚[1,2] 杨海林 TANG Pingyu;SUI Sugang;YANG Hailin(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming Yunan 650500,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650500 [2]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650501

出　　处：《工业安全与环保》2024年第12期38-43,共6页Industrial Safety and Environmental Protection

摘　　要：以马家田尾矿库为工程背景,通过现场钻探取样进行室内颗分实验,结合尾砂结构特征、“分形-分维”理论进行综合分析,研究尾矿颗粒在整体沉积过程中的沉积规律,并以研究的沉积规律为理论依据,将尾矿库划分为6个固结区,对尾矿库固结程度进行计算与预测。研究结果表明:尾矿库坝前多沉积尾粉砂,坝尾多沉积尾粉质黏土,呈“坝前粗、坝中粗细交替、坝尾细”的沉积特征。尾矿颗粒在垂向上呈“下细上粗”、水平上呈“由粗到细”的沉积规律。尾矿粗细颗粒含量整体分布均匀,其中,粗粒尾矿的中值粒径d_(50)变化有规律,细粒尾矿的中值粒径d_(50)变化规律不明显,尾粉土分选差异性较大。尾矿库的主固结已完成,次固结相对变形较小,且最小固结度为0.27。Taking Majiatian tailing pond as the engineering background,indoor particle fractionation experiments were carried out by drilling samples,combined with the structural characteristics of the tailing sand and the"fractaldimensional"theory for comprehensive analysis,and the results were summarized as follows.The deposition law of tailings particles in the overall deposition process is studied,and with the studied deposition law as the theoretical basis,the tailings pond is divided into six consolidation zones,and the consolidation degree of the tailings pond is calculated and predicted.There is a depositional pattern of"fine down and coarse up"vertically,and"from coarse to fine"in the plane.The coarse and fine particle content of the tailings is uniformly distributed,and the median particle size d_(50)of the coarse tailings changes regularly,while the median particle size d_(50)of the fine tailings does not change obviously,and the separation difference of the tail silt is large.The main consolidation of the tailings reservoir has been completed,the secondary consolidation deformation is relatively small,and the minimum consolidation degree is 0.27.

关 键 词：尾矿库 沉积规律 分形-分维 固结度 

分 类 号：TD926.4[矿业工程—选矿]