| 李向前,加那提•卡肯,卿松,李生恺,皮芸烽.某露天煤矿高陡逆倾边坡稳定性劣化机理研究[J].矿产勘查,2026,17(S1):273-278 |
| 某露天煤矿高陡逆倾边坡稳定性劣化机理研究 |
| Study on the influence of rock strata dip on the stability of open-pit mine slopes |
| 投稿时间：2026-03-05 修订日期：2026-06-02 |
| DOI：10.20008/j.kckc.2026S1031 |
| 中文关键词: 露天煤矿 逆倾边坡 稳定性分析 工程地质勘察 数值模拟 |
| 英文关键词: open-pit coal mine reverse slope stability analysis engineering geological investigation numerical simulation |
| 基金项目:本文受中国煤科南京设计研究院科技创新项目（CCTEGNJPG2026NO1）资助。 |
|
| 摘要点击次数: 4 |
| 全文下载次数: 2 |
| 中文摘要: |
| 针对逆倾边坡通常被认为最稳定，但工程实践中发现其稳定性可能劣于顺倾边坡这一矛盾现象，本文以新疆某露天煤矿西帮高陡逆倾边坡为研究对象，探究多因素耦合作用下逆倾边坡的稳定性响应及其主控因素转化机制。综合运用工程地质勘察、岩石力学试验、数值模拟等手段，分析了边坡的稳定性状态与破坏模式，并通过与东帮顺倾边坡、南帮近水平边坡对比，揭示了几何形态与岩体强度对边坡稳定性的控制作用。结果表明：（1）西帮逆倾边坡稳定性系数仅1.40~1.42，远低于东帮顺倾边坡和南帮近水平边坡；（2）西帮边坡上部存在黏聚力仅1 kPa的松散碎石层，潜在滑动面位于该软弱层内，呈现受岩体强度控制的局部圆弧型滑动特征；（3）西帮边坡地震作用下稳定性系数降至1.33~1.34，降幅5.6%，接近临界状态。研究结论表明，露天矿边坡稳定性受岩层结构、几何形态、岩体强度及外部荷载多因素耦合控制，几何劣势与岩性劣势的叠加效应可抵消逆倾结构的优势，导致破坏模式由结构控制向强度控制转变。 |
| 英文摘要: |
| Reverse-dip slopes are commonly regarded as the most stable slope type. However， engineering practice has revealed that their stability may be inferior to that of forward-dip slopes. To address this paradox， this study investigates a steep reverse-dip slope on the western flank of an open-pit coal mine in Xinjiang. The study examines the stability response under coupled factors and the transformation mechanism of primary controlling factors. Engineering geological surveys， rock mechanics tests， and numerical simulations were employed. The failure modes and stability coefficients were analyzed. Comparisons with the forward-dip slope on the eastern flank and the near-horizontal slope on the southern flank revealed the controlling effects of geometric morphology and rock strength on slope stability. The results indicate： 1） The stability factor of the west reverse-dip slope ranges from 1.40 to 1.42， significantly lower than those of the east forward-dip slope and south near-horizontal slope； 2） The upper section of the west slope contains a loose gravel layer with cohesion of only 1 kPa. The potential slip surface lies within this weak layer， exhibiting localized circular-arc sliding governed by rock strength； 3） Under seismic loading， the stability coefficient decreases to 1.33-1.34， a reduction of 5.6%， approaching critical stability. The study concludes that open-pit slope stability is governed by the coupled effects of rock structure， geometric morphology， rock strength， and external loads. The combined disadvantages of geometry and lithology can negate the inherent advantage of a reverse-dip structure. This leads to a shift in failure mode from structure-controlled to strength-controlled. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |