Table of Contents

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 arrangement model
3.4.2 Comparison of blasting process between normal hollowing and model blasting with zoned arrangement of hollowing holes
3.5 Three dimensional modelling tests on segmented charge trench blasting
3.5.1 Model test similarity criterion
3.5.2 Segmented charge hollowing blast test design
3.5.3 Analysis of the results of the segmented charging and hollowing blasting tests
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 re