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双暴露面的阶段充填体孤柱需求强度模型及影响因素
引用本文:杨磊,邱景平,孙晓刚,邢军. 双暴露面的阶段充填体孤柱需求强度模型及影响因素[J]. 东北大学学报(自然科学版), 2018, 39(9): 1327-1331. DOI: 10.12068/j.issn.1005-3026.2018.09.022
作者姓名:杨磊  邱景平  孙晓刚  邢军
作者单位:(1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 皇家墨尔本理工大学 工程学院, 墨尔本3000)
基金项目:国家自然科学基金资助项目(51774066); 国家重点研发计划项目(2018YFC0604604).国家自然科学基金资助项目(51171041).
摘    要:阶段充填体孤柱侧壁均暴露、处于双轴受力状态,易发生剪切破坏.为合理确定其所需强度值,根据Terzaghi松散地压理论和滑楔体极限平衡理论,建立了孤柱需求强度数学计算模型,分析了需求强度的影响因素.结果表明:阶段充填体孤柱需求强度值与采场埋深和结构参数呈正相关,与充填体内摩擦角、充填体-围岩接触面摩擦系数和摩擦角呈负相关.该研究成果对指导矿山充填配比设计、防止地表塌陷和环境保护等具有现实意义.

关 键 词:阶段空场嗣后充填采矿法  充填体矿柱  需求强度  数学模型  滑楔体模型  

Required Strength Model and Influence Factors of Stage Backfill-Pillar with Double Exposed Faces
YANG Lei,QIU Jing-ping,SUN Xiao-gang,XING Jun. Required Strength Model and Influence Factors of Stage Backfill-Pillar with Double Exposed Faces[J]. Journal of Northeastern University(Natural Science), 2018, 39(9): 1327-1331. DOI: 10.12068/j.issn.1005-3026.2018.09.022
Authors:YANG Lei  QIU Jing-ping  SUN Xiao-gang  XING Jun
Affiliation:1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Engineering, RMIT University, Melbourne 3000, Australia.
Abstract:Stage backfill-pillar with double exposed faces subjected to biaxial loads is prone to shear failure. In order to determine the required strength of backfill reasonably, Terzaghi theory on loosing earth pressure and limit equilibrium theory of sliding wedge were used to build a required strength model of stage backfill-pillar. Influencing factors for the required strength of stage backfill-pillar were analysed. The results show that stope depth and structure parameters have a positive effect on the required strength of stage backfill-pillar, while internal friction angle of backfill, and the coefficient of friction and angle between backfill and surrounding rock have a negative effect on it. The results are of great practical significance in guiding backfilling ratio, preventing ground subsidence and protecting the environment.
Keywords:stage subsequent filling mining  backfill-pillar  required strength  mathematical model  wedge model  
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