巖石蠕變擾動(dòng)效應(yīng)理論及試驗(yàn)研究

內(nèi)容概要

　　在深井軟巖條件下，巷道圍巖應(yīng)力狀態(tài)處于巖石強(qiáng)度極限鄰域內(nèi)，圍巖會(huì)產(chǎn)生較大的蠕變變形。并且，隨機(jī)擾動(dòng)荷載會(huì)對(duì)蠕變變形產(chǎn)生很大的影響。因此，研究巖石的蠕變特性以及巖石在擾動(dòng)載荷作用下的變形效應(yīng)，建立蠕變擾動(dòng)效應(yīng)理論，對(duì)深井軟巖支護(hù)具有重要的工程實(shí)用價(jià)值。論文結(jié)合國(guó)家自然科學(xué)基金項(xiàng)目“巖石在強(qiáng)度極限鄰域內(nèi)的擾動(dòng)蠕變特性實(shí)驗(yàn)研究”，圍繞巖石的非線性蠕變特性和蠕變擾動(dòng)效應(yīng)，應(yīng)用新研制的常載三軸擾動(dòng)蠕變儀和彎曲試驗(yàn)儀，進(jìn)行了巖石單軸壓縮蠕變、四點(diǎn)彎曲蠕變和蠕變擾動(dòng)效應(yīng)等系列室內(nèi)試驗(yàn)，主要研究了巖石的非線性蠕變特征、對(duì)擾動(dòng)荷載敏感的鄰域范圍、強(qiáng)度極限鄰域內(nèi)的蠕變擾動(dòng)效應(yīng)等，得到了一系列有意義的研究成果。

書籍目錄

1 Introduction1.1 Research Background and Significance1.2 History and Present Study1.2.1 Rheology Test for Rock1.2.2 Constitutive Models of Rock Rheology1.2.3 Creep Damage and Fracture of Rock1.3 Further Research Issues on Rock Creep1.4 Main Research Methods and Contents1.4.1 Main Research Contents1.4.2 Research Methods1.5 Summary2 Rock Creep under Uniaxial Compression2.1 Conventional Tests of Rock under Uniaxial Compression2.1.1 Rock Specimen Manufacturing and Sonic Wave Screening Testing2.1.2 Mudstone Uniaxial Compression Test2.1.3 Red Sandstone Test under Uniaxial Compression2.2 Tests and Analysis of Rock Creep under Uniaxial Compression2.2.1 Rock Triaxial Creep Disturbance Apparatus2.2.2 Test Methods2.2.3 Strain Measurement2.2.4 Test Results and Analysis2.3 Summary3 Rock Creep Model under Uniaxial Constant Compression3.1 Fundamental Theory of Damage Mechanics3.2 Damage Model of Rock Axial Creep3.2.1 Definition of Damage Variable3.2.2 Damage Evolution Equations3.2.3 Damage Threshold Value3.3 Creep Hardening3.4 Axial Creep Equation of Damage and Hardening under Uniaxial Compression3.5 Damage Model of Rock Lateral Creep3.6 Testing Verification of Creep Constitutive Equations3.7 Summary4 Creep Model under Stepwise Loading4.1 Further Analysis of Creep Test Results4.2 Further Testing Verification of Strain Hardening Effects4.2.1 Instantaneous Test4.2.2 Short-term Creep Test4.2.3 Long-term Test4.3 Constitutive Equation and Verification4.3.1 Constitutive Equations4.3.2 Validation of Constitutive Equation4.4 Summary5 Tests of Disturbance Effects on Rock Creep under Uniaxial Compression5.1 Project Case of Disturbance Effects on Rock Creep5.2 Tests and Analysis of Disturbance Effects on Rock Creep5.3 Tests of Strain Limit Neighborhood and Disturbance Effects on Creep5.4 Summary6 Rock Beam Bending Test and Disturbance Effects on Creep6.1 Bending Creep Test under One Static Load6.1.1 Creep Test6.1.2 Analysis of Bending Neutral Plane and Stress6.2 Bending Creep Test under Static Stepwise Loading6.3 Bending Creep Test under Continuous Disturbance6.4 Tests of Bending Creep under Interval and Repetitive Disturbance6.5 Disturbance Tests within Flexural Strength Neighborhood6.6 Summary7 Main Research Results and ConclusionsAcknowledgementsReferences

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