| 马海涛,于正兴,蓝永建.冻融作用对露天矿山边坡稳定性的影响分析研究[J].矿产勘查,2024,15(S1):56-63 |
| 冻融作用对露天矿山边坡稳定性的影响分析研究 |
| Analysis of the influence of freeze-thaw action on the stability of open-pit mine slopes |
| 投稿时间：2024-03-30 修订日期：2024-05-05 |
| DOI：10.20008/j.kckc.2024s1009 |
| 中文关键词: 岩质边坡 冻融损伤 极限平衡法 稳定性 |
| 英文关键词: trock slope freeze-thaw damage limit equilibrium method stability |
| 基金项目:本文受国家矿山安全监察局安全生产科研攻关项目（第一批）“大型矿山超高陡边坡透明化监测预警技术研究”和中国安全生产科学研究院基本科研业务费专项资金项目（2024JBKY20）联合资助。 |
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| 中文摘要: |
| 为研究冻融作用对不同倾角层状岩质边坡稳定性的影响，以西藏墨竹工卡县高寒地区某露天矿山为研究对象，利用极限平衡法，通过岩土工程仿真分析软件GEO-Studio计算获得边坡的稳定安全系数，对冻融前后不同倾角层状岩质边坡的安全系数进行对比分析，研究了冻融和倾角对层状岩质边坡稳定性的影响。结果表明：（1）随着设计边坡角度逐步增加，冻融前后的边坡安全系数逐渐降低，冻融前下降幅度16.2%～32.6%，冻融后下降幅度15.2%～28.2%；（2）冻融作用后，边坡岩体黏聚力及内摩擦角有所下降，冻融后边坡整体安全系数较冻融前下降0.86%～3.32%，冻融对边坡整体稳定性有一定的影响。本研究成果对冻土地区边坡的损坏及防控具有一定的指导及参考价值。 |
| 英文摘要: |
| In order to study the influence of freezing and thawing on the stability of layered rock slopes with different dip angles， an open-pit mine in the alpine region of Mozhugongka County， Xizang was taken as the research object， and the stability safety factor of the slope was calculated by using the limit equilibrium method and the geotechnical engineering simulation software GEO-Studio. The safety factors of layered rock slopes with different dip angles before and after freezing and thawing were compared and analyzed， and the influence of freezing， thawing and dip angles on the stability of layered rock slopes was studied. The results show that： （1） as the design slope angle gradually increases， the safety factor of the slope before and after freeze-thaw gradually decreases. The decrease before freeze-thaw is 16.2%-32.6%， and the decrease after freeze-thaw is 15.2%-28.2%； （2） After freeze-thaw action， the cohesive force and internal friction angle of the slope rock mass decrease. The overall safety factor of the slope after freeze-thaw is 0.86%-3.32% lower than before， and freeze-thaw has a certain impact on the overall stability of the slope. The results of this study have certain guidance and reference value for the damage and prevention of slopes in permafrost areas. |
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