發(fā)布時(shí)間：2018-05-12 06:11

  本文選題：溫度-應(yīng)力-化學(xué)耦合 + 蠕變特性��； 參考：《青島科技大學(xué)》2013年博士論文

【摘要】：深部軟巖工程是地下工程中的瓶頸工程。深部巖體處于多場(chǎng)耦合的復(fù)雜地下環(huán)境：高溫度、高應(yīng)力以及化學(xué)腐蝕。這些物理化學(xué)場(chǎng)耦合作用,使得深部巖石表現(xiàn)出軟巖的特性：大變形、強(qiáng)流變特性等特點(diǎn),深部巖體工程也變得極不穩(wěn)定,出現(xiàn)難支護(hù)等特點(diǎn),給施工和人員安全造成嚴(yán)重威脅。因此,從巖石蠕變特性方面的研究來(lái)看,僅研究單一應(yīng)力場(chǎng)以及兩場(chǎng)耦合是遠(yuǎn)遠(yuǎn)不夠的。因此,開(kāi)展溫度-應(yīng)力-化學(xué)三場(chǎng)耦合作用下巖體蠕變特性的研究對(duì)預(yù)測(cè)巖體工程穩(wěn)定性影響研究具有十分重要理論意義和實(shí)際工程價(jià)值。 本文采用試驗(yàn)研究、理論分析與數(shù)值模擬相結(jié)合的方法。為了試驗(yàn)的順利開(kāi)展,創(chuàng)新地設(shè)計(jì)出了高溫高壓三軸環(huán)境試驗(yàn)箱,并利用ANSYS有限元分析軟件對(duì)環(huán)境試驗(yàn)箱進(jìn)行了結(jié)構(gòu)分析,驗(yàn)證了設(shè)計(jì)的正確性；就溫度-應(yīng)力-化學(xué)三場(chǎng)耦合作用下深部巖石蠕變特性研究開(kāi)展了系統(tǒng)的試驗(yàn)研究,分析了溫度-應(yīng)力-化學(xué)三場(chǎng)耦合作用下溫度和化學(xué)腐蝕對(duì)深部巖石蠕變規(guī)律的影響效應(yīng),探討了其作用機(jī)理；建立了考慮溫度和化學(xué)pH值影響因素的深部巖石粘彈塑性非線性蠕變方程；建立了深部巖石的T-M-C耦合控制方程；根據(jù)實(shí)際工程背景,對(duì)山東唐口煤礦副井深部巷道進(jìn)行了溫度-應(yīng)力-化學(xué)三場(chǎng)耦合作用下的數(shù)值模擬分析。 論文的主要研究?jī)?nèi)容如下： 1、根據(jù)巖石實(shí)際地下環(huán)境確定了地下2000m深巖石所處環(huán)境參數(shù),并根據(jù)材料力學(xué)和機(jī)械設(shè)計(jì)理論設(shè)計(jì)了三軸環(huán)境試驗(yàn)箱。利用Pro/E和ANSYS有限元分析軟件相結(jié)合的方法對(duì)三軸環(huán)境試驗(yàn)箱進(jìn)行了有限元分析,驗(yàn)證了設(shè)計(jì)的合理性。 2、開(kāi)展了不同溫度和不同化學(xué)pH值條件下的深部頁(yè)巖蠕變特性的研究,分析了不同溫度和不同pH值對(duì)深部頁(yè)巖蠕變特性的影響規(guī)律,探討了頁(yè)巖的溫度和化學(xué)pH值作用機(jī)理。 3、根據(jù)試驗(yàn)結(jié)果,對(duì)粘彈塑性元件組合模型進(jìn)行了改進(jìn),模型的非線性部分是運(yùn)用半線性元件改進(jìn)半理論的方法：采用模型理論來(lái)描述線性流變部分,采用非線性元件來(lái)代替常規(guī)的線性元件來(lái)描述非線性流變部分,建立了能考慮溫度和化學(xué)pH值影響因素的深部巖石粘彈塑性非線性蠕變模型。 4、以多孔介質(zhì)力學(xué)為基礎(chǔ),建立了受溫度場(chǎng)以及化學(xué)腐蝕作用影響的巖土介質(zhì)的T-M-C三場(chǎng)耦合控制方程。提出了由水化學(xué)腐蝕孔隙度方程組,熱彈性、各向同性熱彈性和熱彈塑性的三種情況下的巖石靜力平衡方程,以及溫度控制方程等構(gòu)成的巖石T-M-C耦合控制方程。 5、以工程實(shí)例為背景,利用ANSYS有限元軟件,對(duì)山東唐口煤礦副井深部巷道進(jìn)行溫度-應(yīng)力-化學(xué)耦合作用下的蠕變特性進(jìn)行數(shù)值模擬,分析了溫度和化學(xué)pH值腐蝕對(duì)深部巷道圍巖蠕變規(guī)律的影響。
[Abstract]:Deep soft rock engineering is a bottleneck in underground engineering. Deep rock mass is in complex underground environment with multiple field coupling: high temperature, high stress and chemical corrosion. The coupling of physical and chemical fields makes the deep rock show the characteristics of soft rock, such as large deformation, strong rheology and so on, and the deep rock mass engineering becomes extremely unstable and difficult to support. Pose a serious threat to construction and personnel safety. Therefore, it is far from enough to study the single stress field and the coupling of two fields from the point of view of the creep characteristics of rock. Therefore, it is of great theoretical significance and practical engineering value to study the creep characteristics of rock mass under temperature-stress-chemistry coupling in order to predict the stability of rock mass engineering. In this paper, experimental research, theoretical analysis and numerical simulation are combined. In order to carry out the test successfully, a triaxial environmental test box with high temperature and high pressure was designed, and the structure of the test box was analyzed by using ANSYS finite element analysis software, and the correctness of the design was verified. The creep characteristics of deep rock under the coupling of temperature, stress and chemistry are studied systematically. The effects of temperature and chemical corrosion on the creep behavior of deep rock under the coupling of temperature, stress and chemistry are analyzed. The mechanism is discussed, the nonlinear creep equation of viscoelastic-plastic in deep rock considering the influence of temperature and chemical pH value is established, the T-M-C coupling control equation of deep rock is established, according to the actual engineering background, the nonlinear creep equation of viscoelastic-plastic in deep rock is established. The numerical simulation and analysis of the deep roadway in the auxiliary shaft of Tangkou Coal Mine, Shandong Province, under the coupling of temperature, stress and chemistry are carried out. The main contents of this thesis are as follows: 1. According to the actual underground environment of rock, the environmental parameters of 2000m deep rock are determined, and the triaxial environmental test box is designed according to material mechanics and mechanical design theory. The finite element analysis of the triaxial environmental test box is carried out by using Pro/E and ANSYS finite element analysis software, and the rationality of the design is verified. 2. The creep characteristics of deep shale at different temperatures and different chemical pH values were studied. The effects of different temperatures and pH values on the creep characteristics of deep shale were analyzed, and the mechanism of shale temperature and chemical pH values were discussed. 3. According to the experimental results, the viscoelastic-plastic element combination model is improved. The nonlinear part of the model is the method of using semi-linear element to improve the semi-theory: the model theory is used to describe the linear rheological part. Nonlinear element is used to describe the nonlinear rheological part instead of the conventional linear element. A viscoelastic-plastic nonlinear creep model of deep rock considering the influence of temperature and chemical pH value is established. 4. Based on the mechanics of porous media, the T-M-C three-field coupling governing equation of rock and soil media affected by temperature field and chemical corrosion is established. The rock static equilibrium equations under the three conditions of hydrochemical corrosion porosity equation, thermoelasticity, isotropic thermoelasticity and thermoelastoplasticity, as well as the T-M-C coupling governing equation of rock temperature are presented in this paper, which are composed of hydrochemical corrosion porosity equations, thermoelastic equations, isotropic thermoelastic equations and thermoelastic-plastic equations. 5. Taking the engineering example as the background, the creep characteristics of the deep roadway in the auxiliary shaft of Tangkou Coal Mine in Shandong Province under the coupling of temperature, stress and chemistry are numerically simulated by using ANSYS finite element software. The influence of temperature and chemical pH corrosion on the creep of deep roadway surrounding rock is analyzed.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU45

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