Download - Rock Fragmentation by Blasting
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 1/7
First International Symposiumon
ROCK FRAGMENTATION BY BLASTINGLulea Sweden August 23-26 1983
UB/T IB Hann over 89 715 875
Volume No. 3.
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 2/7
•i
VOLUME No. 1 - 3
TABLE OF CONTENTS
Page Volume
815 3
•817 3
Welcome to Lulea University of Technology.
Vice Chancellor Dr Torbjb rn Hedberg
Opening of the Symposium and Introduction.
Dr Per-Anders Persson, Chairman of the organizing committe
KEY-NOTE SESSION
Key-note. Fragmentation - a Review. Disintegration of solids. 819 3
Ulf Langefors, Sweden
Gaps in the Field of Fragmentation by Blasting and some 827 3
Thoughts about Future Research and Development.
Agne Rustan, Sweden
Blasting Experiments in the Luossavaara Research Mine. 839 3
Torbjorn Naartijarvi, Sweden
Discussion 855 3
Session 1.IMPORTANT PARAMETERS FOR ROCK FRAGMENTATION
Chairman: C M . Lownds, vice chairman: Agne Rustan
*
A Study of Bench Blasting in Rhyoporphyry at a Reduced
Scale and the Statistical Analysis of the Regularity
for Fragmentation Distribution.
Ma Bailing et al, China
Production Drilling with high Accuracy.
Lars Hermansson, Sweden
Energy in Fragmentation.Per-Anders Persson, Sweden
Discussion 1
Measurements and Predictions of Borehole Pressure
Variations in Model Blasting Systems.
F.O. Otuonye et al, USA
The Effect of Charge Cavity Ratio on Rock Breaking.
Zhu Rui-Geng et al, China.
857
789
777
873
7
21
The Influence of Controllable Blast Parameters on
Fragmentation and Mining Costs.
T.N. Hagan, Australia
Discussion 2
31
875
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 3/7
Page Volume
The Role of Stress Waves in Explosively Induced Bulk 53 1
Rock Motion.
J.N. Edl, USA.
Effect of Explosive Properties, Rock Type and Delays 71 1
on Fragmentation in Large Model Blasts.O.R. Bergmann, USA.
On the Applicability of the Tensile Strength as an 79
Index to Rock Fragmentation.
Kenneth Maki, Sweden
Dynamic Photoelastic Studies on Delayed Pre-split Blasting . 97
K.R.Y. Simha et al, USA
The Influence from Specific Cha rge , Geometric Scale 115
and Physical Properties of Homogenous Rock on
Fragmentation.
Agne Rustan et al, Sweden
Regulations of the Process of Hard Rocks Fragmentation 143
by Blasting.
K.A. Dolgov, USSR.
Discussion 3 876 3
Session 2.
THEORY OF FRACTURING AND CRACK PROPAGATIONChairman: W .L . Fourney, vice chairman: Agne JRustan
Spallation, Break-Up and Separation of Layers by 149 1
Oblique Stress-Wave Interaction.
H.P. Rossmanith et al, Austria
Theoretical Research and Modelling of Directed Crack 169 1
Propagation in Borehole Blasting.
A.L. Isakov et al , USSR.
Model Studies on Explosively Driven Cracks under 183 1
Confining In-situ Stresses.
K.R.Y. Simha et a l, USA
New Methods of Measuring Fracture Toughness on 199 \
Rock Core s.
F. Ouchterlony et al, Sweden
Discussion 4 883 3
Session 3.
INSTRUMENTAL SYSTEMS FOR EVALUATION OF FRAGMENTATION
Chairman: Dinis da Gama, vice chairman: Gunnar Almgren
Rock Fragmentation by Explosive s. 225 1
Stephen R. Winzer et al , USA
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 4/7
Page Volume
The Development Concept of the Integrated 251 1
Electronic Detonator.
Paul N. Worsey et al , USA
The Measuring Equipment and the Technique of 259 1
Particle Velocity - at Investigation of Dynamic
Rock Constitutive Equation In-situ.
Wang Wu-Ling et al , China
Interaction between Blast Design Variable s; 265 1
Experimental and Modelling Studies.
J.J. Dawes et al , Australia
Electromagnetic Velocity Gauge Measurement of 289 1
Rock Mass-Motion during Blasting .
Chapman Young et al, USA.
Discussion 5 885
Increasing Productivity through Field Control 301
and High-Speed Photography.
R. Frank Chiappetta et al , USA
A Method for Estimation of Fragment Size Distribution 333
with Automatic Image Processing.
Olle Carlsson et al , Sweden
Instrumented Model Scale Blasting in Conc rete . 799
Gert Bjarnholt et al, Sweden
Discussion 6 * 889
Session 4.
FEM AND FINITE DIFFERENCE-CODES
Chairman: Gwynn Harries, vice chairman: Per-Anders Persson
Numerical Simulation of Fracture and Fragmentation. 347
L.G. Margolin et al, USA
Simulation of Rock Blasting with the Shale Code. 361
T.F. Adams et al , USA
Numerical Modelling of Rock Fragmentation. 375
S. Valliappan et al, Australia
Computer Simulation of Blast—Induced Vibr ation, Fracture 393
and Fragmentation processes in Brittle Rocks.
Peter Digby et al, Sweden
Computational Simulations of Dynamically induced 407
Fracture and Fragmentation.
Stuart McHugh, USA
Discussion 7 893
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 5/7
Session 5.
MATHEMATICAL MODELS FOR BiAST AND FRAGMENTATION
PREDICTIONS
Chairman: L.G. Margolin, vice chairman: Roger Holmberg Page Volume
Rock Displacement Velocity during a Bench Blast. 753 2
R.F. Favreau, Canada
The modelling of Long Cylindrical Charges of Explosive. 419 2
Gwynn Harries, Australia
The Kuz-Ram Model for Prediction of Fragmentation 439 2
from Blasting.
C.V.B. Cunningham, South Africa
Discussion 8 899 3
Computer Modelling of Fragmentation from an Array 455 2
of Shotholes.
C M . Lownds, South Africa
Some Ideas on how to Improve Calculations of the 469 2
Fragment Size Distribution in Bench Blasting .
Hans Hjelmberg, Sweden.
Session 6.
INFLUENCE OF JOINT AND ROCK STRUCTURE ON FRAGMENTATION
Chairman: Calvin J. Konya, vice chairman: Lennart Ottosson
Differentiated Blasting Technique for Optimum 495 2
Fragmentation at Aitik Copper Mine . A case study.
Gustaf Tham, Sweden ,
Fragmentation in Jointed Rock Materi al. 505 2
W.L. Fourney et al, USA
Influence of Joints on Rock Blasting. A Model 533 2
Scale study.
D.P. Singh et al, India
Influence of Structural Geology on Controlled 555 2
Blasting in Sedimentary Rocks - Case History.
Goran Lande, USA
Discussions 9 903 3
Use of Comminution Theory to Predict Fragmentation 565 2
of Jointed Rock Masses Subjected to Blasting.
Dinis da Gama, Brazil
The influence from Primary Structure on Fragmentation. 581 2
Yang Zu Guang et al, Sweden
Experimental Investigation of Dynamic Surface 605 2
Response to Explosive Loading.David C Holloway et al , USA
Discussions 10 905 3
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 6/7
Session 7.
COST ANALYSES OF THE SYSTEM OF DRILLING, BLASTING,
MUCKING, CRUSHING AND TRANSPORTATION
Chairman: Stephen R. Winzer, vice chairman: Ingemar Marklund Page Volume
Electric Shovel Performance as a Measure of Blasting 625 2
Efficiency.S.R. Williamson et al, Australia
Development of a Fragmentation Monitoring 637 2
System for Evaluating Open Stope Blast
Performance at Mount Isa Min es.
J.R.T. Grant et al, Australia
Optimization of Open Pit Bench Blasting.
Kai Nielsen, Norway
The Precision of Long Hole Drilling with Modern 665 2
Machines in Mining Operations.Angelo Medda et al, Italy
Discussions 11 907 3
Sublevel Stoping in Strassa Mine. 685 2
Kurt Gustafsson, Sweden
Energy Requirements of Rock Breaking in Mining 705 2
Operations; Considerations and Propos als.
Pier Paolo Manca et al, Italy
Accurate Bench Drilling Aids - for Better 725 2
Overall Economy .
Bjb rn Karlsson, Sweden.
Sources of Error in Long Hole Drilling - 739 2
their Consequences and how to avoid them.
Per-Erik Lindvall, Sweden
The Effect of Blasting on the Grade of Ore Crushing. 909 3
S.D. Victorov, USSR
Discussions 12 912 3
PANEL DISCUSSION 915 3
Opening of the panel discussion. Roger Holmberg 915 3
Part 1. The Organization of International Blasting 917 3
Research and Standardization. Moderator: Agne Rustan
Part 2. New Developments in Technique to Control 918 3
Fragmentation and Their Impact on Modern Mining and
Construction Engineering. Moderator: Roger Holmberg
8/14/2019 Rock Fragmentation by Blasting
http://slidepdf.com/reader/full/rock-fragmentation-by-blasting 7/7
Page Volume
A New Technique for Controlled Small-Scale Hydraulic 921 3
Fracturing.
J.J. Kolle, USA
Errata Sheet 937 3
List of Participants 939 3