考虑粒径分布的某大型排土场坡角设计  

Slope Angle Design of a Large Dump Considering Particle Size Distribution

作　　者：李占科[1] 郭艳艳 郑磊 魏宁宇 彭瑞雪 赵洪颖 LI Zhanke;GUO Yanyan;ZHENG Lei;WEI Ningyu;PENG Ruixue;ZHAO Hongying(Sinosteel Chifeng Jinxin Mining Co.,Ltd.;School of Civil Engineering,North China University of Technology)

机构地区：[1]中钢集团赤峰金鑫矿业有限公司,内蒙古自治区赤峰市024022 [2]北方工业大学土木工程学院

出　　处：《现代矿业》2024年第6期107-109,共3页Modern Mining

摘　　要：排土场具有成分复杂、粒径分布不均匀、孔隙率大、黏聚力小等特点,极易产生滑坡,为此对大型排土场边坡坡面碎石土粒径分布进行现场调查。研究发现,大粒径碎石从坡顶到坡底的含量逐渐提高,在坡底部含量占80.12%,粒径的分选性显著,决定了排土场力学性质下部强、上部弱的分布特点。在此基础上通过对给定坡高所允许最大坡角进行研究,得出随着坡角增大边坡稳定系数逐渐减小,两者之间近似呈线性关系,最终得到了180 m坡高允许的最大坡角为30°。研究为排土场设计工作提供依据。The dump has the characteristics of complex composition,uneven particle size distribu⁃tion,large porosity and small cohesion,which is prone to landslide.Therefore,the particle size distribution of gravel soil on the slope of large dump is investigated on site.The study finds that the content of large-size gravel gradually increases from the top to the bottom of the slope,accounting for 80.12%at the bottom of the slope,and the sorting of the particle size is significant,which determines the distribution characteristics of the mechanical properties of the lower part of the dump and the upper part.On this basis,through the study of the maximum slope angle allowed by the given slope height,it is concluded that the slope stability coeffi⁃cient decreases gradually with the increase of slope angle,and there is an approximate linear relationship between the two.Finally,the maximum allowable slope angle of 180 m slope height is 30°.The research pro⁃vides a basis for the design of the dump.

关 键 词：排土场 粒径分布 边坡角 塑性变形 

分 类 号：TD804[矿业工程—矿山开采]