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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
水浸泥岩基底内排土场边坡稳定性分析
  • Title

    Stability analysis of internal waste dump slope in water immersed mudstone base

  • 作者

    赵汝辉

  • Author

    ZHAO Ruhui

  • 单位

    煤炭科学技术研究院有限公司煤矿灾害防控全国重点实验室北京市煤矿安全工程技术研究中心

  • Organization
    China Coal Research Institute
    State Key Laboratory of Coal Mine Disaster Prevention and Control
    Beijing Engineering and Research Center of Mine Safe
  • 摘要

    为了揭示水浸泥岩基底内排土场边坡失稳机理,采用室内试验探究了泥岩弱层抗剪强度参数随含水率的损伤演化规律,结合数值计算软件分析了含水率对内排土场边坡位移、滑移破坏特征及安全系数的响应特征。结果表明:随着泥岩弱层含水率的增加,黏聚力和内摩擦角呈非线性减小的二次函数分布规律;边坡最大水平位移、最大垂直位移和最大剪应变与含水率均呈正相关关系,边坡以水平运动为主,主要呈现沿排土场基底接触面的滑移破坏;边坡安全系数与含水率呈负相关关系,为保证边坡稳定,泥岩弱层含水率不超过30%。

  • Abstract

    In order to reveal the instability mechanism of waste dump slope in water soaked mudstone base, the damage evolution law of shear strength parameters of weak mudstone layer with water content is explored by indoor test. Combined with numerical calculation software, the response characteristics of water content to displacement, sliding failure characteristics and safety factor of waste dump slope are analyzed. The results show that with the increase of water content in weak mudstone layer, the distribution law of cohesion and internal friction angle decreases nonlinearly; the maximum horizontal displacement, maximum vertical displacement and maximum shear strain of the slope are positively correlated with the water content. The slope is dominated by horizontal movement, mainly showing sliding failure along the contact surface of the waste dump base; the safety factor of the slope is negatively correlated with the water content. In order to ensure the stability of the slope, it is recommended that the water content of the weak layer of mudstone should not exceed 30%.

  • 关键词

    边坡稳定性泥岩基底内排土场含水率边坡安全系数

  • KeyWords

    slope stability;mudstone basement;internal dump;moisture content;slope safety factor

  • 基金项目(Foundation)
    煤炭科学技术研究院有限公司技术创新基金资助项目(2023CX-Ⅰ-08)
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    • 不同含水率和垂直压力下抗剪强度

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