Chapter 1 Theoretical Analysis of Cut Hole Segmental Blasting 1.1 Influence of free surface and resistance line on blasting effect 1.1.1 Explosive explosion effect inside the rock mass 1.1.2 Explosive effect of explosives near the free surface 1.2 Mechanism of cut blasting for sectional charge in hole 1.2.1 Analysis of charge form and rock breaking ability 1.2.2 Mechanism of slant cut sectional charge blasting 1.2.3 Mechanism of straight cut sectional charge blasting 1.3 Theoretical study on optimization of cut hole layout 1.3.1 Change analysis of cut hole region 1.3.2 Mechanism of cutting hole zoning arrangement Chapter 2 Study on Evolution Law of Full field Strain Under Segmented Charge Condition 2.1 Study on dynamic fracture characteristics of explosive crack in cylindrical charge 2.1.1 Test principle of dynamic caustic experiment under explosion load 2.1.2 Experimental model design and explosion crack growth results 2.1.3 Dynamic parameter analysis of explosive crack growth process 2.2 Study on full field strain evolution of cylindrical charge explosion 2.2.1 Digital image correlation experimental system 2.2.2 Experimental model design 2.2.3 Analysis of full field strain evolution process of explosion 2.2.4 Strain attenuation law of initiation end and non initiation end 2.3 Study on superposition effect of strain field in double hole blasting of cylindrical charge 2.3.1 Experimental model design 2.3.2 Radial full field strain analysis with double hole superposition 2.3.3 Axial full field strain analysis of double hole superposition 2.4 Study on full field strain characteristic distribution of segmented charge 2.4.1 Experimental model design 2.4.2 Full field strain analysis of sectional charge 2.5 Study on full field strain characteristics of segmented charge with different time difference 2.5.1 Experimental model design 2.5.2 Full field strain analysis of medium with different initiation time difference in upper and lower sections Chapter 3 Numerical Simulation and Three dimensional Modelling of Segmental Blasting in Roadway Trenching Holes 3.1 Numerical simulation of single hole segmented charge blasting 3.1.1 Introduction to the SPH FEM method and introduction to the model 3.1.2 Blast simulation process and analysis 3.2 Numerical simulation of hollowing blasts with multi hole segmental charging 3.2.1 Verification of the SPH FEM approach 3.2.2 Models and materials 3.2.3 Simulation results 3.2.4 Influence of cutting parameters on blasting effect 3.3 Effect of delay time on segmented charge hollowing blasting 3.3.1 Introduction to single hole delayed segmental blasting modelling 3.3.2 Blast simulation process and analysis 3.4 Numerical simulation of blasting in a zoned arrangement of trenching holes 3.4.1 Introduction to the hollow hole zoning arr 3.5.4 Analysis of the results of the delayed blast test of the hollowing out trench by section charging 3.6 Three dimensional model blasting tests for the zonal arrangement of trenching holes 3.6.1 Model test design for zonal arrangement of hollowing holes 3.6.2 Analysis of the test results of two hollowing and blasting models Chapter 4 Research on Physical Model Test and Numerical Simulation of Deep Hole Sectional Cutting in Shaft 4.1 Experimental study on blasting model of sectional charge in cut hole 4.1.1 Study on equivalent resistance of deep hole segmented cut blasting 4.1.2 Determination of model test similarity and similarity constant 4.1.3 Basic physical and mechanical properties testing of model experimental specimens 4.2 Analysis on blasting effect of model test of segmented cut in hole 4.2.1 Physical model experiment scheme and specimen making 4.2.2 Model experiment of shaft section cut blasting 4.2.3 Analysis of the volume and block size of the cutting cavity 4.3 Study on numerical simulation of blasting with sectional charge in cut hole 4.3.1 Numerical simulation method and material constitutive parameters 4.3.2 Numerical analysis of continuous charge blasting in holes 4.3.3 Numerical analysis of segmented charge blasting in holes 4.3.4 Damage evaluation of blasting cavity with different segment ratios Chapter 5 Study on the Variation Law of Explosive Wave Field and Pressure Field 5.1 Explosion wave field and pressure field test system 5.2 Experimental study on directional fracture blasting of cutting seam cartridge 5.2.1 Experimental Details 5.2.2 Experimental results of blast wave of the cutting seam cartridge 5.2.3 Experimental results of cutting seam cartridge overpressure test 5.2.4 Numerical simulation of cutting seam cartridge blast wave 5.3 Study on the influence of different slit pipe quality on explosion wave field and fracture field 5.3.1 Propagation characteristics of explosion shock wave and pressure field 5.3.2 Influence of explosive damage and fracture characteristics of slit charge 5.3.3 Numerical simulation of detonation wave of slit charge 5.4 Propagation characteristics of explosion wave and explosion gas in blast hole 5.4.1 Experimental description 5.4.2 Experimental results of explosion wave 5.4.3 Numerical simulation of the cutting seam cartridge explosion wave 5.5 Explosion wave and explosion fracture characteristics of cylindrical charges 5.5.1 Propagation characteristics of cylindrical charge explosion waves 5.5.2 Explosion fracture characteristics in cylindrical charge 5.6 Analysis of explosion wave interactions and rock breaking effects during dual initiation 5.6.1 Shock wave collision mechanism of the explosive detonated from both ends 5.6.2 Explosion wave field of the detonation from both ends 5.6.3 Numerical simulations of the damage distribution in the blast hole wall Chapter 6 Research on Damage and Fracture Behavior of Explosive Explosion on Medium 6.1 Studies on directional breaking controlled theory of slotted cartridge blasting for rock
6.3.2 CT scanning and 3D reconstruction of segmented blasting rock 6.3.3 Fractal dimension calculation and analysis 6.4 Effect of different filling media between explosive and blast hole wall on rock blasting 6.4.1 Blasting schemes for different filling media 6.4.2 Analysis of blasting effect of rock with different filling media 6.4.3 Numerical simulation analysis of explosion energy transfer efficiency for different filling media Chapter 7 Field Industrial Research on Roadway Segmented Cutting Test 7.1 Engineering background 7.1.1 Engineering overview and hydrogeology 7.1.2 Construction technology and equipment 7.2 Subsection charge cutting blasting test 7.2.1 Continuous charge blasting test 7.2.2 Sectional charge bursting test 7.3 Blasting test of cutting hole layout optimization 7.3.1 Ordinary cutting hole blasting test 7.3.2 Blasting test of cutting hole partition arrangement 7.3.3 Comprehensive test of cutting hole segmented charge partition arrangement Chapter 8 Field Industrial Test Study on Deep Hole Sectional Cutting in Vertical Shaft 8.1 Project profile 8.1.1 Engineering background and hydrogeological survey 8.1.2 Construction technology profile 8.1.3 Rock mechanical properties test 8.2 Parameter design of deep hole sublevel cutting blasting 8.2.1 Research on cutting hole diameter and hole spacing 8.2.2 Study on delay time of segmented charge in blast hole 8.2.3 Study on unit consumption of upper and lower segmented explosives 8.3 6 m deep hole section cut blasting experiment 8.3.1 Blasting experiment of unsegmented in cutting hole 8.3.2 The upper section charge ratio of 0.4 cutting blasting experiment 8.3.3 The upper section charge ratio of 0.6 cutting blasting experiment 8.4 Controlled blasting experiment of peripheral directional fracture 8.4.1 Directional fracture scheme design of peripheral hole 8.4.2 Analysis of surrounding rock damage test around shaft References
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