排土场空间效应及其稳定性评价方法研究  

RESEARCHES ON SPACE EFFECT OF WASTE DUMPS AND ITS STABILITY EVALUATION METHOD

作　　者：汪海滨[1] 李小春[1] 米子军[2] 白俊[2] 王少泉[3] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]太原钢铁(集团)有限公司矿业分公司,山西太原030027 [3]中冶北方工程技术有限公司,辽宁鞍山114009

出　　处：《岩石力学与工程学报》2011年第10期2103-2111,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB732000);中国冶金建设协会工程建设国际标准<冶金矿山排土场设计规范>项目

摘　　要：依托矿山排土场工程实例,采用调研、试验和数值分析相结合的研究结果表明,评价结果和过程安全性相悖的关键在于排土场地基-排土体相互作用下的系统空间效应和自身组构特征分层效应。通过现场实证、理论分析和数学物理模型解释凹形的空间夹持效应和凸形发散作用。给出稳定性分析采用2D或3D模型应遵循的高度和曲率半径关系条件的基本原则。进一步,采用允许变形和部分破坏的设计理念,以地基坡度、基础性质、排土料岩性、混合体坡高和坡脚线距离为基本因素,区分设定作业台阶安全标准和整体稳定标准,关联安全等级与控制标准以及考虑降雨及地震工况组合,建立以安全系数为主,综合应力场、位移场、塑性区分布特征的综合评价方法技术路线和流程。Based on the investigation,test and numerical analysis of the mine dumps,it is believed that the key of disaccord between results from the 2D-LEM and reality is system spatial effect under the interaction of base and dump body.The spatial clamp effect of convex and divergent effect of concave are explained,as well as essential relationship between height and radius of curvature which should be abided by 2D or 3D stability analysis is given on the basis of field test,theoretical analysis and physical model.Furthermore,the safe class,evaluation criterion and technical route which takes the factor of stability as major and also considers stress,displacement fields and plastic region distribution is established,under the principle that the deformation and partial failure are allowable.

关 键 词：采矿工程 散体力学 排土场 安全稳定性评估 空间效应 方法论 过程安全 

分 类 号：TD21[矿业工程—矿井建设]