东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (9): 1327-1331.DOI: 10.12068/j.issn.1005-3026.2018.09.022

• 资源与土木工程 • 上一篇    下一篇

双暴露面的阶段充填体孤柱需求强度模型及影响因素

杨磊1,2, 邱景平1, 孙晓刚1, 邢军1   

  1. (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)
  • 收稿日期:2017-08-26 修回日期:2017-08-26 出版日期:2018-09-15 发布日期:2018-09-12
  • 通讯作者: 杨磊
  • 作者简介:杨磊(1993-),男,江西瑞金人,皇家墨尔本理工大学博士研究生; 邢军(1967-),男,辽宁本溪人,东北大学教授.冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.
  • 基金资助:
    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).

Required Strength Model and Influence Factors of Stage Backfill-Pillar with Double Exposed Faces

YANG Lei 1,2, QIU Jing-ping1, SUN Xiao-gang1, XING Jun1   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Engineering, RMIT University, Melbourne 3000, Australia.
  • Received:2017-08-26 Revised:2017-08-26 Online:2018-09-15 Published:2018-09-12
  • Contact: QIU Jing-ping
  • About author:-
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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

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.

Key words: stage subsequent filling mining, backfill-pillar, required strength, mathematical model, wedge model

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