Rock Fragmentation by Blasting Proceedings of the 9th Int. Symp. on Rock Fragmentation by Blasting - Fragblast 9, Sept. 2009, Granada Spain

Keynote addresses

• Fragmentation characterization; the Swebrec function and its use in blast engineering
• Intra-hole and inter-hole effects in typical blast designs and their implications on explosives energy release and detonator delay time—A critical review

1. Rock characterization

• Mechanical characterization of rocks at high strain rate by the JRC modified Hopkinson bar: A tool in blast and impact assessment
• Rate dependence of tensile/flexural strengths of Laurentian granite
• Determination of dynamic fracture parameters of rocks using a semi-circular bend technique
• Dynamic caustics experiment of blast-induced crack propagation in material containing plane of weakness
• 3-Dimensional visualization of granitic rocks subjected to impact loading using Micro-focus X-ray CT scanner
• An application of fuzzy sets to the blastability assessment of rock mass
• Hydrothermal alteration impact on drilling and blasting management, planning and fragmentation results
• How 3D images support bench face profiling, blast planning and rock mass characterisation
• Referenced 3D images from inside cavities and behind rings in sublevel caving

2. Explosives and initiation systems

• Study of the effect of particle size distribution on the detonation velocity of modified ANFO
• Application of heavy ANFO explosives in quarries nearby Istanbul
• Development of low density reactive agents
• Evaluation of salt-ANFO mixtures in back break reduction by data envelopment analysis
• Properties of alternatively fueled ammonium nitrate explosives
• Use of furnace oil as liquid fuel in site mixed slurry explosive system – A case study
• A long-hole open stope blast in hot ground
• A new principal formula for the determination of explosive strength in combination with the rock mass strength
• Study and application of an elliptical bipolar linear shaped charge
• Limitations of electronic delays for the control of blast vibration and fragmentation
• Pre-programmed electronic detonators for underground blasting
• The key technique of highly precise and safe delay detonator without primary explosive

3. Blast design, monitoring and fragmentation assessment

• A common form for fragment size distributions from blasting and a derivation of a generalized Kuznetsov’s x₅₀-equation
• Formulae and techniques for assessing features of blast-induced fragmentation distributions
• Evaluating a calibration method for the estimation of fragmented rock 3D-size-distribution out of 2D images
• Fragmentation size measurement using 3D surface imaging
• Evaluation of some distribution functions for describing rock fragmentation data
• Influence of rock mass blastability on explosive energy distribution
• A practical method of bench blasting design for desired fragmentation based on digital image processing technique and Kuz-Ram model
• Kuznetsov model’s efficiency in estimation of mean fragment size at the Sungun copper mine
• Determination of the practicable burden in Sungun open-pit mine, Iran
• Control of rock fragmentation and muck pile geometry during production blasts (environmentally friendly blasting technique)
• The application of electronic monitors to understand blast movement dynamics and improve blast designs
• New methodology for the quality control of long-hole drilling in underground hard rock mines
• Causes, implications and control of oversize during blasting
• Tunnel blast pattern design using short holes

4. Modelling of rock blasting

• Simulation of real detonations as an energy source term for the Hybrid Stress Blasting Model
• Developments in numerical modeling of blast induced rock fragmentation: Updates from the HSBM project
• Towards a complete validation of the lattice scheme in the Hybrid Stress Blasting Model (HSBM)
• Modelling the impact of sublevel caving blast design and performance on material recovery
• A numerical investigation of the effect of blasthole delay in rock fragmentation
• Use of a modified particle-based method in simulating blast-induced rock fracture
• A new 3D simulation framework to model blast induced rock mass displacement using physics engines
• Large scale concrete cube blasts for the HSBM model
• Analysis of single particle fragmentation curves after drop weight impact of blast induced fragments
• Waves, fractures and boundary effects associated with blast experiments conducted in cylindrical and block type specimens
• Seismic radiation patterns from cylindrical explosive charges by analytical and combined finite-discrete element methods
• Borehole excitation by oscillating/moving pressure band
• New blasting simulation

5. Rock damage and wall control

• The size of the damage zone in relation to the linear charge concentration
• The extent of blast damage from a fully coupled explosive charge
• Crack lengths or blast damage from string emulsion and electronic detonators
• Controlled blasting (pre-splitting) at an open-pit mine in India
• Carving-like blasting technique and its application in rock anchor beam excavation
• Evaluation of Kiruna mine drifting data using the NIOSH design approach
• A study on the estimation of the Tunnel Contour Quality Index in a drill and blast tunnel
• Blasting in a large scale opening gallery—case study: Feter 6 gallery, Faryab chromate mine
• Effect of joint orientations on rock mass damage at a penstock tunnel subjected to repeated blast vibrations—a case study
• New perspectives for blast damage evaluation in crystalline solid materials

6. Vibrations

• The impact of geological features on level of ground vibrations
• Determination of ‘safe’ infrastructure vibration levels using alternative approaches
• Assessment of the error of blast vibration measurements
• Seismic wave monitoring and ground vibration analysis for bench blasting in Sungun open pit copper mine
• Impact assessment of surface mine blasting on adjacent underground mine structures using field measurements and numerical techniques
• Comparison of traditional near-field vibration prediction models with three-dimensional vibration scaling and blast wave energy
• Influence of rock mass discontinuity networks on the seismic response parameters
• An integrated approach of signature hole vibration monitoring and modeling for quarry vibration control
• Vibration induced by drilling and blasting excavation process in high in-situ stress area
• Monitoring of blast-induced vibration effects on structures by fiber Bragg grating
• 3D hydrocode analyses of a mechanically stabilized earth retaining wall subjected to production blast vibrations at a surface coal mine
• Blast vibration study to analyse the response of a wind tower close to an open pit mine

7 Environmental

• Mechanistic Monte Carlo models for analysis of flyrock risk
• Flyrock prediction by multiple regression analysis in Esfordi phosphate mine of Iran
• Evaluation of meteorological effects on airblast levels
• Characterising dust generation from blasting
• Greenhouse gas implications of explosives and blasting
• Blast emission criteria and detection methods for the safeguarding of marine mammals in a blast environment

8 Blasting economics and downstream effects

• Optimization of blasting in narrow reef mines in South Africa
• Productivity improvement in an opencast coal mine in India using digital image analysis technique
• Throw blasting analysis—a focus on coal uncovery and recovery rates
• The application of a blast audit for production improvement
• Estimate of support and reinforcement cost increase associated to poor blasting practices in drifting

9 Case studies

• Maximizing the throw while controlling vibration within safe limits in cast blasting
• Six Sigma^® methodology applied to blasting
• A practical approach to fragmentation optimization at Kidd Mine
• Infrastructure design effects on the Pipa Norte Mine, division El Teniente
• Successful application of bamboo spacers in smooth wall blasting for highway construction in hilly terrain—a case study
• Controlled blasting for protection of water production wells at Cerro Corona
• Hard rock dimension stone quarrying using control blasting—Case study: Shahkooh granite quarry
• A research on the propagation law of the shock wave in underwater blasting and the bubble curtain protection
• New progress and development of engineering blasting in China
• Advances in precision blasting in China

10 Special blasting applications

• Explosive synthesis for lithium battery materials
• Effect of explosion waves on stacked wood chips in a closed vessel
• FEM simulation of a reinforced concrete chimney blasting demolition with separate model
• Demolition of arch portion of brick and mortar constructed railway bridge
• Measurement of the vibration from the blasting demolition of a tall chimney

Biography

Jose A. Sanchidrian