工程力学 ›› 2018, Vol. 35 ›› Issue (11): 240-248.doi: 10.6052/j.issn.1000-4750.2017.08.0606

• 其他工程学科 • 上一篇    下一篇

基于室内模型试验的多漏斗同步放矿柔性隔离层材料受力特性分析

陈庆发, 赵富裕, 陈青林, 王玉丁   

  1. 广西大学资源环境与材料学院, 南宁 530004
  • 收稿日期:2017-08-06 修回日期:2017-12-12 出版日期:2018-11-07 发布日期:2018-11-07
  • 通讯作者: 陈庆发(1979-),男,河南人,教授,博士,从事非传统采矿与岩石力学理论研究(E-mail:chqf98121@163.com). E-mail:chqf98121@163.com
  • 作者简介:赵富裕(1993-),男,河南人,硕士生,从事同步放矿与矿山安全技术方面的研究(E-mail:realmefly@outlook.com);陈青林(1990-),男,江西人,硕士生,从事柔性隔离层方面理论分析(E-mail:18376748317@163.com);王玉丁(1993-),男,湖南人,本科生,从事柔性隔离层试验研究(E-mail:diwangyuding@163.com).
  • 基金资助:
    国家自然科学基金项目(51464005)

MECHANICAL PROPERTIES ANALYSIS FOR A FLEXIBLE ISOLATION LAYER MATERIAL IN MULTIPLE FUNNELS SYNCHRONOUS ORE DRAWING BASED ON A INDOOR MODEL EXPERIMENT

CHEN Qing-fa, ZHAO Fu-yu, CHEN Qing-lin, WANG Yu-ding   

  1. School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
  • Received:2017-08-06 Revised:2017-12-12 Online:2018-11-07 Published:2018-11-07

摘要: 开展多漏斗放矿条件下柔性隔离层材料受力特性分析是放矿机理研究的基础。该文基于室内模型试验,测定了试验中隔离层所受拉应力和压应力,分析了隔离层材料的受力特性及失效条件。研究结果表明: 1)横向上,随测点与隔离层中心点距离的增大,隔离层内部拉应力值的变化趋势与正弦函数一致;隔离层所受压应力值逐渐减小,所受摩擦力值呈余弦函数形态变化;对应空腔部位的隔离层未受支持力作用,其余部位的隔离层所受支持力载荷的变化规律与压应力一致;2)纵向上,作用于隔离层的所有力系值随下降深度的增加而增大;隔离层接触底部结构前,其内部平均拉应力值随下降深度增加呈指数函数增大;隔离层所受拉应力最大值与下降深度的关系为σsmax=-0.32+0.32e0.005h,隔离层失效点满足等式s=±30.12 cm。

关键词: 同步充填, 室内模型试验, 柔性隔离层材料, 受力特性, 失效点

Abstract: The development of mechanical properties of a flexible isolation layer material in ore drawing from multiple funnels is the foundation of ore drawing mechanism. The tensile stress and compressive stress of an isolation layer were measured using an indoor model experiment, and the mechanical properties and rupture condition of isolation-layer materials were analyzed. The results show that:1) in the transverse direction, with the increase in distance between measuring points and center point in an isolation layer, tensile stress changes sinusoidally; compressive stress decreases gradually and the friction changes cosinoidally; the isolation layer on cavity is not affected by its supporting force, and the variation law of the supporting force in other parts is the same as compressive stress; and 2) in the longitudinal direction, all forces acting on an isolation layer increase with the descending height; average tension stress increases exponentially before contacting funnels in the bottom of the model; correlation between the maximum tension stress and the descending height is σsmax=-0.32+0.32e0.005h, and failure point satisfies equation of s=±30.12 cm.

Key words: synchronous filling, indoor model experiment, a flexible isolation layer material, mechanical characteristics, failure point

中图分类号: 

  • TD801
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