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ContributorsAbout the authorsPrefaceAcknowledgments1. Size effect of rock samples 1Hossein Masoumi1.1 Size effeclwfr intact rock 21.1.1 Introduction 21.1.2 Background 31.1.3 Experimental study 91.1.4 Unified size effect law 191.1.5 Reverse size effects in UCS results 241.1.6 Contact area in size effects of point load results 281.1.7 Conclusions 341.2 Length-to-diameter ratio on point load strength index 351.2.1 Introduction 351.2.2 Background 361.. Methodology 381.2.4 Valid and invad ilure modes 391.2.5 Conventional point load strength index size effect 421.2.6 Size effect of point load strength index 441.2.7 Conclusions 491.3 Plasticity model for size-dependent behavior 511.3.1 Introduction 511.3.2 Notation and unified size effect law 531.3.3 Bounding surface plasticity 551.3.4 Model ingredients 571.3.5 Model calibration 651.3.6 Conclusions 741.4 Scale-size dependency of intact rock 771.4.1 Introduction 771.4.2 Rock types 781.4.3 Experimental procedure 801.4.4 Comparative study 911.4.5 Conclusion 1031.5 Scale effect into multiaxial failure criterion 1031.5.1 Introduction 1031.5.2 Background 1061.5.3 Scale and Weibull statistics into strength measurements 1071.5.4 The modified failure criteria 1111.5.5 Comparison with experimental data 1171.5.6 Conclusions 1211.6 Size-dependent Hoek-Brown failure criterion 1211.6.1 Introduction 1211.6.2 Background 1221.6.3 Size-dependent Hoek-Brown failure criterion 1261.6.4 Example of application 1361.6.5 Conclusions 137References 137Further reading 1442. Rock fracture toughness 145Sheng Zhang2.1 Fracture toughness of splitting disc specimens 1462.1.1 Introduction 1462.1.2 Preparation of disc specimens 1472.1.3 Fracture toughness of five types of specimens 1482.1.4 Load-displacement curve of disc splitting test 1532.1.5 Comparison of disc splitting test results 1552.1.6 Conclusions 1582.2 Fracture toughness of HCFBD 1592.2.1 Introduction 1592.2.2 Test method and principle 1602.. HCFBD specimens with prefabricated cracks 1622.2.4 Calibration of maximum dimensionless SIF Ymax 1632.2.5 Results and analysis 1642.2.6 Conclusions 168. Crack length on dynamic fracture toughness 169..1 Introduction 169..2 Dynamic impact splitting test 169.. Results and discussion 171..4 DFT irrespective of configuration and size 175..5 Conclusions 1762.4 Crack width on fracture toughness 1772.4.1 Introduction 1772.4.2 NSCB three-point flexural test 1782.4.3 Width influence on prefabricated crack 1802.4.4 Width influence of cracks on tested fracture toughness 1832.4.5 Method for eliminating influence of crack width 1852.4.6 Conclusions 1872.5 Loading rate effect of fracture toughness 1882.5.1 Introduction 1882.5.2 Specimen preparation 1892.5.3 Test process and data processing 1892.5.4 Results and analysis 1912.5.5 Conclusions 2042.6 Hole influence on dynamic fracture toughness 2042.6.1 Introduction 2042.6.2 Dynamic cleaving specimens and equipment 2052.6.3 SHPB test and data record 2072.6.4 Dynamic finite element analysis 2102.6.5 Results analysis and discussion 2122.6.6 Conclusions 2172.7 Dynamic fracture toughness of holed-cracked discs 2172.7.1 Introduction 2172.7.2 Dynamic fracture toughness test 2192.7.3 Experimental recordings and results 2212.7.4 Dynamic stress intensity factor in spatial-temporal domain 2262.7.5 Conclusions 12.8 Dynamic fracture propagation toughness of P-CCNBD 12.8.1 Introduction 12.8.2 Experimental preparation 2.8.3 Experimental recording and data processing 2.8.4 Numerical calculation of dynamic stress intensity factor 2422.8.5 Determine dynamic fracture toughness 2472.8.6 Conclusions 253References 254Further reading 2583. Scale effect of the rock joint 259Joun O3.1 Fractal scale effect of opened joints 2603.1.1 Introduction 2603.1.2 Scale effect based on fractal method 2623.1.3 Constitutive model for opened rock joints 2663.1.4 Validation of proposed scaling relationships 2683.1.5 Conclusions 2723.2 Joint constitutive model for multiscale asperity degradation 2743.2.1 Introduction 2743.2.2 ntification of irregular ot rofile 2753.. Description of proposed model 2773.2.4 Joint model validation 2813.2.5 Conclusions 2883.3 Shear model incorporating small- and large-scale irregularities 2903.3.1 Introduction 2903.3.2 Constitutive model for small-scale joints 2913.3.3 Constitutive model for large-scale joints 2943.3.4 Correlation with experimental data 2993.3.5 Conclusions 3083.4 Opening effect on joint shear behavior 3093.4.1 Introduction 3093.4.2 Constitutive model for joint opening effect 3103.4.3 Opening model performance 3123.4.4 Discussion 3173.4.5 Conclusions 3183.5 Dilation of saw-toothed rock joint 3183.5.1 Introduction 3183.5.2 Constitutive law for contacts in DEM 3203.5.3 Model calibration 3203.5.4 Direct shear test simulation 33.5.5 Conclusions 3333.6 Joint mechanical behavior with opening values 3343.6.1 Introduction 3343.6.2 Normal deformation of opened joints 3373.6.3 Direct shear tests 3503.6.4 Results analysis and discussion 3513.6.5 Conclusions 3563.7 Joint constitutive model correlation with field observations 3573.7.1 Introduction 3573.7.2 Model description and implementation 3583.7.3 Stability analysis o are-scale rock structures 3653.7.4 Conclusions 385References 390Further reading 3974. Microseismic monitoring an ppicton 399Shuren Wang and Xiangxin Liu4.1 Acoustic emission of rock plate instability 4004.1.1 Introduction 4004.1.2 Materials and methods 4014.1.3 Results analysis 4054.1.4 Discussion of the magnitudes of AE events 4074.1.5 Conclusions 4084.2 Prediction method of rockburst 4094.2.1 Introduction 4094.2.2 Microseismic monitoring system 4104.. Active microseismicity and faults 4124.2.4 Rockburst prediction indicators 4154.2.5 Conclusions 4204.3 Near-fault mining-induced microseismic 4204.3.1 Introduction 4204.3.2 Engineering situations 4224.3.3 Computational model 4244.3.4 Result analysis and discussion 4254.3.5 Conclusions 4304.4 Acoustic emission recognition of different rocks 4324.4.1 Introduction 4324.4.2 Experiment preparation and methods 4344.4.3 Results and discussion 4394.4.4 AE signal recognition using ANN 4424.4.5 Conclusions 4484.5 Acoustic emission in tunnels 4484.5.1 Introduction 4484.5.2 Rockburst experiments in a tunnel 4504.5.3 Experimental results 4534.5.4 AE characteristics of rockburst 4584.5.5 Discussion 4614.5.6 Conclusions 4664.6 AE and infrared monitoring in tunnels 4664.6.1 Introduction 4664.6.2 Simulating rockbursts in a tunnel 4684.6.3 Experimental results 4714.6.4 Rockburst characteristics in tunnels 4824.6.5 Conclusions 485References 486Further reading 4935. Structural effect of rock blocks 495Shuren Wang and Wenbing Guo5.1 Cracked roof rock beams 4965.1.1 Introduction 4965.1.2 Mechanical model of a cracked roof beam 4975.1.3 Instability feature of cracked roof beams 5055.1.4 Mechanical analysis of roof rock beams 5075.1.5 Conclusions 5125.2 Evolution characteristics of fractured strata structures 5125.2.1 Introduction 5125.2.2 Engineering background 5155.. Mechanical and computational model 5175.2.4 Results and discussion 5215.2.5 Conclusions 5315.3 Pressure arching characteristics in roof blocks 5325.3.1 Introduction 5325.3.2 Pressure arching characteristics 5345.3.3 Evolution characteristics of pressure arch 5415.3.4 Results and discussion 5465.3.5 Conclusions 5495.4 Coite pressure arch in thin bedrock 5505.4.1 Introduction 5505.4.2 Engineering background and pressure arch structure 5515.4.3 Computational model and similar experiment 5575.4.4 Results and discussion 5605.4.5 Conclusions 5685.5 Pressure arch performances in thick bedrock 5695.5.1 Introduction 5695.5.2 Engineering background 5715.5.3 Pressure-arch analysis and experimental methods 5725.5.4 Results and discussion 5775.5.5 Conclusions 5865.6 Elastic energy of pressure arch evolution 5875.6.1 Introduction 5875.6.2 Engineering background 5895.6.3 Pressure-arch analysis and computational model 5915.6.4 Simulation results and discussion 5945.6.5 Conclusions 6045.7 Height predicting of water-conducting zone 6055.7.1 Introduction 6055.7.2 High-intensity mining in China 6065.7.3 OFT influence on FWCZ development 6085.7.4 Development mechanism of FWCZ based on OFT 6115.7.5 Example analysis and numerical simulation 6135.7.6 Engineering analogy 6245.7.7 Conclusions 627References 627Further reading 633Index 635
"王树仁 博士,教授,主要从事岩土工程、岩石力学、采矿工程和数值模拟计算等方面的科研与教学工作。 主持及完成自然科学项目(51774112;51474188; 51074140; 51310105020)、河北省自然科学项目(E2014203012)、河北省科技支撑项目(072756183)和河南省科技厅靠前合作项目(162102410027; 182102410060)等。基于上述研究,荣获科技进步二等奖1项,省部级二等奖5项,军队及省部级科技进步三等奖3项。荣获2015年澳大利亚资奋进研究学者,现为河南省特聘教授和澳大利亚新南威尔士大学兼职教授。"
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