【摘要】：鉆井技術(shù)在煤礦行業(yè)的不斷進(jìn)步下也不斷地創(chuàng)新和發(fā)展,其中井壁結(jié)構(gòu)的穩(wěn)定性一直是科研人員探討的熱門話題。為了研究井壁結(jié)構(gòu)與土層及地下水之間相互作用的力學(xué)性能,需要借助三軸高強(qiáng)井壁實驗加載裝置來進(jìn)行模擬實驗。三軸高強(qiáng)井壁實驗加載裝置是通過模擬地下井壁受力變化時的各種力學(xué)性能,借助計算機(jī)程序?qū)ζ溥M(jìn)行數(shù)據(jù)統(tǒng)計。本文通過分析本校實驗室原有三軸實驗加載裝置存在的缺陷——承載力(40MPa)的不足,提出研發(fā)承載力為60MPa的新型三軸高強(qiáng)井壁實驗加載裝置。通過對井壁模型試驗加載的原理,結(jié)合原有加載裝置的構(gòu)成,設(shè)計出了新型三軸高強(qiáng)井壁實驗加載裝置。該裝置能模擬井壁與地下土壤的接觸受力情況,因此新型三軸高強(qiáng)井壁實驗加載裝置的研發(fā)為煤礦工程井壁結(jié)構(gòu)力學(xué)模型實驗的加載方法開拓了一種新的思維。本文研究主要從以下三個方面進(jìn)行:首先介紹了《材料力學(xué)》中厚壁圓筒的彈性理論分析,利用推導(dǎo)出的公式對加載裝置的厚壁圓筒壁厚進(jìn)行了計算;而上下圓端蓋厚度是通過《過程設(shè)備設(shè)計》中周邊固支的圓平板理論計算的;螺釘型號數(shù)量則是參考《機(jī)械設(shè)計手冊》進(jìn)行計算驗證的。其次就理論計算得出的圓筒尺寸利用ANSYS有限元軟件對其選用So1id45單元進(jìn)行建模分析,在60MPa壓力下厚壁圓筒能滿足承載力的要求但是圓筒中部出現(xiàn)應(yīng)力集中現(xiàn)象,為了改善此現(xiàn)象對厚壁圓筒中部進(jìn)行加肋處理并得出加肋的高度和厚度。最后從加載裝置的鑄造工藝方面進(jìn)行了相關(guān)闡述。通過本次研究發(fā)現(xiàn)壁厚為72mm、上下平端蓋85mm的厚度和12.9級M30的加固螺釘能滿足預(yù)期60MPa的承載能力,另外通過數(shù)值模擬發(fā)現(xiàn)厚壁圓筒中部增加厚度38mm,高度100mm的肋能有效的改善筒體中部應(yīng)力集中的現(xiàn)象。
[Abstract]:Drilling technology has been innovated and developed with the continuous progress of coal mining industry, and the stability of shaft lining structure has been a hot topic discussed by researchers. In order to study the mechanical properties of the interaction between wall structure, soil layer and groundwater, it is necessary to carry out simulation experiments by means of triaxial high-strength shaft lining experimental loading device. The experimental loading device of triaxial high strength shaft lining is based on the simulation of various mechanical properties of underground shaft wall with the help of computer program. Based on the analysis of the defects of the original triaxial experimental loading device (40MPa) in our laboratory, a new type of triaxial high-strength shaft lining experimental loading device with 60MPa bearing capacity is proposed in this paper. A new type of triaxial high-strength shaft lining experimental loading device is designed through the principle of shaft wall model test loading and the composition of the original loading device. The device can simulate the contact force between shaft wall and underground soil, so the development of new triaxial high-strength shaft wall experimental loading device has opened up a new thinking for loading method of shaft wall structural mechanical model experiment in coal mine engineering. This paper mainly studies from the following three aspects: firstly, the elastic theory analysis of the medium thick wall cylinder is introduced, and the thickness of the thick wall cylinder is calculated by using the derived formula. The thickness of upper and lower circular end cover is calculated by the theory of circular plate clamped around in process equipment Design, and the number of screw type is verified by reference to the Manual of Mechanical Design. Secondly, the cylinder size calculated by theory is modeled and analyzed by using ANSYS finite element software to select So1id45 element. Under 60MPa pressure, the thick-walled cylinder can meet the requirements of bearing capacity, but the stress concentration phenomenon appears in the middle of the cylinder. In order to improve this phenomenon, the thick-walled cylinder is stiffened and the height and thickness of the rib are obtained. Finally, the foundry process of the loading device is expounded. It is found that the wall thickness is 72 mm, the thickness of the upper and lower end cover 85mm and the 12.9 grade M30 reinforcement screw can meet the expected bearing capacity of 60MPa. In addition, the numerical simulation shows that the thickness of the thick wall cylinder increases by 38 mm in the middle of the cylinder. The high 100mm rib can effectively improve the stress concentration in the middle of the tube.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD26

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本文編號：2379663