降雨对层状软岩边坡的影响规律分析
Analysis of the Influence Law of Rainfall on Layered Soft Rock Slope
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摘要: 采用摩根斯坦-普瑞斯法和有限差分法对层状软岩边坡在无水位和雨季水位2种状态下的稳定性进行分析评价，并以顺兴露天煤矿采场和排土场边坡为例进行了实例分析。结果表明：降雨对采场南帮边坡剖面D2的稳定系数折减幅度最大，达到了29.63%；对西帮D3剖面位置的弱化幅度最小，仅为0.14%。其主要原因在于南帮的暴露面积相对于其它边坡更大，在降雨影响下南帮边坡内部的水位线浸没了潜在滑面，增加了潜在滑面上部滑体的重力和水压力，造成边坡安全系数的急剧下降。采取削坡减重、内排压帮及疏干排水相结合的滑坡防治工程措施可有效的提高边坡稳定性，防止形成滑坡。Abstract: The Morgan Stanley-Pryss method and the finite difference method are used to analyze and evaluate the stability of the layered soft rock slope under the two conditions of water-free and rainy season water level, and the slope of the stope and dump in Shunxing Open-pit Coal Mine. As an example, the results show that the stability of the D2 stability of the slope of the southern slope of the stope is the largest, reaching 29.63%; the weakening of the D3 section of the western slope is the smallest, only 0.14%. The main reason is that the exposed area of the southern slope is larger than other slopes. Under the influence of rainfall, the water level line inside the southern slope is immersed in the potential slip surface, which increases the bulk density and water pressure of the sliding surface of the potential slip surface. The slope safety factor has dropped dramatically. The landslide prevention engineering measures combined with slope reduction, internal pressure relief and drainage and drainage can effectively improve the slope stability and prevent the formation of landslides.
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[1] 樊有维,章羽,金雪莲,等.降雨对匀质各向异性土质边坡稳定性的影响[J].岩土力学,2006,27(S2):1097-1102. [2] 舒继森,唐震,才庆祥.水力学作用下顺层岩质边坡稳定性研究[J].中国矿业大学学报,2012,41(4):521. [3] OHWT, VANAPALLI SK. Influence of rain infiltration on the stability of compacted soil slopes[J]. Computers and Geotechnics, 2010, 37(5): 649-657. [4] 刘才华,徐健,曹传林,等.岩质边坡水力驱动型顺层滑移破坏机制分析[J].岩石力学与工程学报,2005(19):131-135. [5] 陈祖煜.关于“渗流作用下土坡圆弧滑动有限元计算”的讨论之一[J].岩土工程学报,2002,24(3):394. [6] 栾婷婷.露天矿排土场滑坡预警方法的研究及应用[D].北京:北京科技大学,2015. [7] 唐学民.摩根斯坦-普瑞斯法对露天矿边坡稳定性的评价应用[J].西部资源,2012(5):118-119. [8] 陈永明,滕光亮,石玉成,等.地震作用下宝成铁路109隧道边坡失稳机理的离散元模拟[J].岩土工程学报,2013,35(S1):23-32. [9] 舒继森.露天煤矿边坡稳定关键影响因素及边坡治理与采矿一体化方法研究[D].徐州:中国矿业大学,2009. [10] 霍丽红.谢尔塔拉露天煤矿首采区东帮边坡稳定性研究[D].阜新:辽宁工程技术大学,2012. [11] 张信,殷志祥,王东.顺兴露天矿顺倾软弱基底内排土场稳定性研究[J].世界科技研究与发展,2015,37(2):138-140.
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