| 流变作用下露采岩质边坡和采空区的稳定性分析 |
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| 引用本文： | 王军,蒋清南,曹平,林杭.流变作用下露采岩质边坡和采空区的稳定性分析[J].矿业研究与开发,2011(5):87-89,111. |
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| 作者姓名： | 王军 蒋清南 曹平 林杭 |
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| 作者单位： | 湖南工程学院建筑工程学院;广东省水利水电第三工程局;中南大学资源与安全工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50774093); 湖南省教育厅资助科研项目(11C0341) |
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| 摘 要： | 针对井下开采转露天开采现状,分析了岩体材料蠕变力学特性对采空区和边坡稳定性的响应。采用改进的西原蠕变模型,对边坡安全系数的求解进行了推导,然后通过工程算例进行了数值计算,研究了采空区安全顶板的厚度和采空区边坡稳定性的影响。计算结果表明:蠕变效应下,采空区安全顶板的厚高比要比工程经验规定的值偏大,且采空区边坡垂直位移的变化对其稳定性有显著的影响,拉剪塑性区主要分布在边坡的中上部和深部采空区,并不是在矿体中,算例验证了该模型的计算是可靠的,为采空区边坡的稳定性分析提供了参考。
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| 关 键 词： | 露天边坡 采空区 安全顶板 蠕变效应 厚高比 |
Analysis on Stability of Goaf and Open-pit Rock Slope Based on Rheological Mechanics of Rock Material |
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| WANG Jun,JIANG Qingnan,CAO Ping,LIN Hang.Analysis on Stability of Goaf and Open-pit Rock Slope Based on Rheological Mechanics of Rock Material[J].Mining Research and Development,2011(5):87-89,111. |
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| Authors: | WANG Jun JIANG Qingnan CAO Ping LIN Hang |
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| Affiliation: | WANG Jun1,JIANG Qingnan2,CAO Ping3,LIN Hang3(1.College of Architecture Engineering,Hunan Institute of Engineering,Xiangtan,Hunan 411104,China,2.No.3 Water Conservancy and Hydro-electric Engineering Board of Guangdong Province,Dongguan,Guangdong 523710,3.School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China) |
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| Abstract: | In view of open-pit mining transferred from underground mining,the influence of creep mechanical properties of rock material on stability of goaf and slope was analyzed.An improved Nishihara creep model was established to compute the safety factor of slope.According to the numerical calculation of an engineering example,the influence of the safety roof thickness of goaf on the stability of slope was analyzed.The results showed the thickness-depth ratio of safety roof was larger than its experience value und... |
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| Keywords: | Open-pit slope Goaf Safety roof Creep effect Thickness-depth ratio |
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