| 露天煤矿冻结岩土边坡介质特征与稳定性分析 |
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| 引用本文： | 王晓东,徐拴海,许刚刚,王海,朱世彬,武博强.露天煤矿冻结岩土边坡介质特征与稳定性分析[J].煤田地质与勘探,2018,46(3):104-112. |
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| 作者姓名： | 王晓东 徐拴海 许刚刚 王海 朱世彬 武博强 |
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| 作者单位： | 中煤科工集团西安研究院有限公司;中国科学院西北生态环境资源研究院冻土工程国家重点实验室 |
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| 基金项目： | 冻土工程国家重点实验室开放基金项目（SKLFSE201311）；中煤科工集团西安研究院有限公司科技创新基金项目（2012XAYCX020） |
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| 摘 要： | 为了科学评价冻岩露天矿边坡稳定性，并采用有效措施保证冻岩边坡工程的安全建设和运营，分析了岩石在不同温度条件下多个物理力学参数的变化规律，结果表明，冻结态使岩石的强度得到一定的提高，而冻融循环使岩石的强度产生一定的削弱。由于岩体具有介质和结构的双重属性，冻融循环作用对岩体的介质和结构面损伤均较显著，可以通过改进的Hoek-Brown岩体强度准则分析冻融环境中的岩体强度。基于木里聚乎更矿区冻岩露天煤矿边坡的调查分析，总结归纳了该区冻岩边坡的破坏现象和类型，在冻融循环作用下冻岩边坡的破坏模式基本为浅表部的渐进式破坏。
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| 关 键 词： | 含冰裂隙岩体 冻融损伤 边坡稳定性 热力耦合 |
| 收稿时间： | 2017-04-08 |
Medium characteristics and stability of frozen rock (soil) slope in open-pit coal mine |
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| Abstract: | In order to scientifically evaluate frozen rock slope stability and keep slope safe with suitable technology in open-pit coal mine, and the changing law of physical and mechanical parameters are analyzed. The results show that the mechanical parameters increase while the rock is frozen, but the rock strength decreases after freezing and thawing cycles. Because rock mass has double properties of material and structure, damage of material and structure of rock mass is significant during freezing and thawing cycles, and freezing and thawing cycles is a key factor of slope stability. Based on the survey of slopes in Juhugeng coal mining area, and due to difference of slope strata, slope presents several stable and failure forms. Uniting generalized H-B failure criteria and strength damage law of rock block and rock structural plane during freezing-thawing cycles, the damage law of rock mass could be calculated, and it is an important theoretic foundation to analyze rock slope stability in freezing and thawing environment. |
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