本文選題：基巖　切入點：凍結井壁　出處：《西安科技大學》2015年碩士論文

【摘要】：近年來,我國煤礦建設重點向西部轉移,遇到了復雜地質情況。井筒一般要穿過厚度不等的軟巖,由于其具有膠結性差,強度低,遇水軟化、孔隙發(fā)育但凍結后強度提高等特點。這些礦井需要利用凍結法施工,在理論及經驗匱乏情況下,按照東部深厚表土層的經驗進行井壁設計,必然使井壁設計不盡合理。開展凍結井壁的可靠性研究具有重要的理論價值和現實意義。論文在對傳統(tǒng)井壁設計方法的局限性進行闡述的基礎上,對凍結井壁上的永久地壓、溫度應力、凍結壓力、靜水壓力和附加力等荷載作用進行了討論論文以甘肅新莊煤礦風井為實際工程背景,以可靠性計算原理及方法為理論依據,系統(tǒng)分析了可靠性計算的遺傳算法的優(yōu)越性考慮井壁在不同階段的受力情況,建立適應于西部凍結法施工井壁的可靠性分析模型利用MATLAB中的遺傳算法工具箱,并編制函數模型實現遺傳算法采用本文提出的可靠性理論計算方法對新莊煤礦風井井壁結構進行了可靠性分析和優(yōu)化設計利用ANSYS有限元軟件對井壁原有設計和優(yōu)化設計結果進行模擬,并對比優(yōu)化前后井壁的最大位移和最大應力。計算結果表明,利用本文建立的可靠性設計方法和計算模型,在保證井壁結構安全可靠的前提下比傳統(tǒng)設計結果具有優(yōu)化性,為同類工程提供了參考依據。
[Abstract]:In recent years, the focus of coal mine construction in China has shifted to the west and encountered complicated geological conditions.The wellbore usually passes through soft rock with different thickness, because of its poor cementation, low strength, water softening, the development of pores but the increase of strength after freezing, etc.These mines need to be constructed by freezing method. Under the condition of lack of theory and experience, the design of shaft lining must be unreasonable according to the experience of deep topsoil in the east.It is of great theoretical and practical significance to study the reliability of frozen shaft lining.On the basis of expounding the limitation of traditional shaft wall design method, the permanent ground pressure, temperature stress, freezing pressure on frozen shaft wall are discussed in this paper.The static water pressure and additional force are discussed in this paper. The paper takes the wind well of Xinzhuang Coal Mine in Gansu as the practical engineering background, and takes the reliability calculation principle and method as the theoretical basis.In this paper, the superiority of genetic algorithm for reliability calculation is analyzed systematically. Considering the stress condition of shaft lining in different stages, a reliability analysis model suitable for freezing construction in western China is established. The genetic algorithm toolbox in MATLAB is used to analyze the reliability analysis model.To simulate the design results,The maximum displacement and stress of shaft wall before and after optimization are compared.The calculation results show that the reliability design method and the calculation model established in this paper are more optimized than the traditional design results on the premise of ensuring the safety and reliability of the shaft lining structure, which provides a reference basis for the similar projects.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD265.3

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