东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (2): 293-296.DOI: -

• 资源与土木工程 • 上一篇    下一篇

基于软岩流变特性的边坡动态稳定性分析

李海洲，杨天鸿，夏冬，郑超   

  1. (东北大学资源与土木工程学院，辽宁沈阳110819)
  • 收稿日期:2012-08-07 修回日期:2012-08-07 出版日期:2013-02-15 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:李海洲(1982-)，男，辽宁锦州人，东北大学博士研究生；杨天鸿(1968-)，男，辽宁抚顺人，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(50874024，10872046，50904013).

Slope Stability Analysis Based on SoftRock Rheological Characteristics

LI Haizhou， YANG Tianhong， XIA Dong， ZHENG Chao   

  1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2012-08-07 Revised:2012-08-07 Online:2013-02-15 Published:2013-04-04
  • Contact: LI Haizhou
  • About author:-
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摘要： 以新疆华宏矿业北山露天煤矿边坡砂质泥岩为对象，对砂质泥岩弱层进行室内单轴压缩蠕变实验研究.采用西原体蠕变模型得到砂质泥岩的蠕变方程和松弛方程，结合Hoek-Brown准则反演了砂质泥岩弱层岩体的时变强度参数.应用FLAC3D有限差分模拟软件，对北山煤矿首采区非工作帮边坡进行动态稳定性分析.结果表明，由于砂质泥岩弱层强度参数随时间不断减小，边坡安全系数随之降低，历时18年左右，边坡安全系数从159逐渐降低到115，低于规范要求.研究结果为服务年限内矿山边坡动态安全预测提供了理论依据.

关键词: 砂质泥岩, 流变特征, 时变强度, 边坡稳定性, 稳定性分析

Abstract: According to the results of creep testing on the sandy mudstone at Beishan open pit coal mine in Xinjiang， the creep curves were described by the viscoelastoplastic creep model and the timevarying parameters were revealed via HoekBrown strength criterion. The dynamic stability of the slope was analyzed using FLAC3D numerical software. The result shows that the slope safety factor is reduced to 115 from 159 after 18 years， which is lower than the specification requirements. This work provides a theoretical basis for the assessment of the dynamic safety of this slope during its service life.

Key words: sandy mudstone, rheological characteristics, timevarying strength, slope stability, stability analysis

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