本文選題：邊坡穩(wěn)定性 + 模糊測度��； 參考：《河北大學(xué)》2015年碩士論文

【摘要】：節(jié)理化巖質(zhì)邊坡穩(wěn)定性分析向來是巖土工程領(lǐng)域內(nèi)重要研究課題之一。由于在分析過程中涉及到大量的工程參數(shù),如巖體內(nèi)聚力、內(nèi)摩擦角等參數(shù)值難以精確測定而存在客觀的模糊性,從而為邊坡穩(wěn)定性分析帶來許多困擾。為此,本文采用模糊測度理論模型對此類問題進行分析。在分析過程中,本文以我國江南某大型露天礦山為例,對其邊坡穩(wěn)定性進行了具體的計算分析。首先,利用模糊測度模型分析了在爆破動力影響下邊坡失穩(wěn)的可能性。模糊概率,即考慮在不同最大一段起爆藥量的條件下,邊坡巖體失穩(wěn)程度。在分析過程中,針對工程參數(shù)確定問題,采用了人工神經(jīng)網(wǎng)絡(luò)方法確定了與爆破動力有關(guān)的參數(shù)及與巖石性質(zhì)有關(guān)參數(shù)。同時,采用經(jīng)典的簡化Bishop法及有限單元法對邊坡的穩(wěn)定性進行了分析,并與模糊測度分析結(jié)果進行對比分析。由分析結(jié)果可知,三種分析方法所得結(jié)果與實際工程情況一致;一方面,有限元數(shù)值模擬結(jié)果與模糊測度法的預(yù)測結(jié)果相吻合;另一方面,模糊測度法不僅可以將諸多影響邊坡穩(wěn)定性的因素的“模糊性”可慮其中,還可以得出節(jié)理化邊坡失穩(wěn)的破壞程度,進而比經(jīng)典分析方法更符合于工程實際。此外,應(yīng)用模糊測度法對節(jié)理化巖質(zhì)邊坡進行穩(wěn)定性分析時,可以獲得距邊坡不同距離,爆破震動對邊坡穩(wěn)定性的影響程度。以此來評價生產(chǎn)爆破中所采用的炸藥量是否合理,進而達到控制爆破的目的,提高爆破效果的同時,也確保了邊坡的穩(wěn)定性及安全生產(chǎn)。綜合分析結(jié)果表明,本文采用的模糊測測度理論模型及分析方法對節(jié)理裂隙發(fā)育或風(fēng)化破碎的巖質(zhì)邊坡較為適用。
[Abstract]:The stability analysis of rock slope has always been one of the important research topics in geotechnical engineering field. Because a large number of engineering parameters, such as cohesion of rock mass and angle of internal friction, are difficult to be accurately measured in the process of analysis, there is an objective fuzziness, which brings many problems to the stability analysis of slope. Therefore, the fuzzy measure theory model is used to analyze this kind of problems. In this paper, a large open pit mine in the south of the Yangtze River is taken as an example to calculate and analyze the slope stability. Firstly, the possibility of slope instability under the influence of blasting dynamics is analyzed by using fuzzy measure model. Fuzzy probability, that is, considering the slope rock mass instability degree under the condition of different maximum initial explosive charge. In the process of analysis, the artificial neural network method is used to determine the parameters related to blasting dynamics and rock properties in view of the problem of engineering parameter determination. At the same time, the classical simplified Bishop method and finite element method are used to analyze the slope stability, and the results are compared with the results of fuzzy measure analysis. From the analysis results, we can see that the results obtained by the three methods are consistent with the actual engineering situation. On the one hand, the results of the finite element numerical simulation are consistent with the results of the fuzzy measure method; on the other hand, The fuzzy measure method can not only take into account the fuzziness of many factors affecting slope stability, but also obtain the failure degree of the unsteady slope, which is more suitable for engineering practice than the classical analysis method. In addition, when using fuzzy measure method to analyze the stability of rock slope, the influence degree of blasting vibration on slope stability can be obtained at different distance from the slope. In order to evaluate whether the quantity of explosive used in production blasting is reasonable or not, the purpose of controlling blasting is achieved, and the effect of blasting is improved, and the stability and safety of the slope are ensured at the same time. The comprehensive analysis results show that the fuzzy measurement theory model and the analytical method used in this paper are more suitable for rock slope with jointed fractures developed or weathered and broken.
【學(xué)位授予單位】：河北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU457

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本文編號：1822753