| 肖兵,宋心怡,宋彦琦,马宏发.胜利一号露天矿含弱层边坡稳定性模拟研究[J].矿产勘查,2025,16(9):2202-2209 |
| 胜利一号露天矿含弱层边坡稳定性模拟研究 |
| Simulation study on stability analysis of slop with weak interlayer in Shengli No. 1 open-pit coal mine |
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| DOI：10.20008/j.kckc.202509015 |
| 中文关键词: 边坡稳定性 软弱夹层 矿物组分 细观结构 FLAC3D |
| 英文关键词: slope stability weak interlayer mineral composition meso-structure FLAC3D |
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| 中文摘要: |
| 本文以胜利一号露天矿南帮边坡为研究对象，分析弱层泥岩的矿物组成、细观结构及力学特性，采用极限平衡法和强度折减法确定边坡潜在危险滑移面，考虑弱层流变效应影响分析边坡稳定性。研究表明，弱层泥岩中黏土矿物占比为 63.9%，矿物颗粒多呈不规则薄片状结构，孔隙裂隙高度发育，具有明显弱胶结构造特征。胜利露天矿南帮边坡安全主控因素为弱层塑性流动及断层结构发育，理论计算得到上部岩层沿弱层剪出和断层下盘至坡底剪出两种潜在滑移面，且安全系数分别为 1.05和 1.75，结合数值模拟结果确定最危险位置为“边坡上部圆弧、弱层共同形成组合滑动”。考虑弱层流变效应影响边坡稳定性降低，建议工程实践中加强弱层处的稳定性监测和支护。 |
| 英文摘要: |
| Taking the south slope of Shengli No. 1 open-pit coal mine as the research object. The mineral com-position, meso-structure and mechanical properties of weak mudstone were analyzed, the limit equilibrium methodwas used combining with the strength reduction method to determine the potential-slip surface of the slope withweak interlayer, and the influence of weak layer rheological effect on slope stability is considered. The researchshows that the proportion of clay minerals in weak mudstone is 63.9%, and the mineral grains are in thin lamellarstructure with highly developed pores and fissures. The weak mudstone has obvious weak cementation characteris-tics. The main controlling factors of slope stability in Shengli open-pit coal mine are the plastic flow in weak inter‐layer and the development of fault structure, two types of potential-slip surfaces were considered: shear out of theupper strata along the weak interlayer or shear out from the footwall to the bottom of the slope, the factor of safetyvalues were 1.05 and 1.75. The most dangerous slip surface of slope is,“the combination of the upper circular arc and the weak interlayer”. Considering the weak layer rheological effect, the slope stability decreases, so it is recom-mended to strengthen the stability monitoring and reinforcement at the weak interlayer in engineering practice. |
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