Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
Application of Numerical Modelling to Examine Damage in Wall Control Operations
By P. Katsabanis
Numerical modelling was used to examine damage in wall control operations. Decoupled charges appear to create larger damage zones than fully coupled low density charges with similar charge distributio
Jan 1, 2001
-
Damage Development in Small Blocks
By C. Pelley, S. Kelebek, G. Kunzel, P. Katsabanis
Small blocks of granodiorite have been subjected to blast loads from a single borehole and from a series of boreholes detonating at various timing intervals. The damage of the blocks was assessed thro
Jan 1, 2003
-
South African Blasting Practice in Shaft Sinking
By Rodney C. Espley-Jones, John C. B Wilson
South Africa is well known for its shaft sinking exploits, and many of the world's biggest and deepest shafts are to be found there. Blasting practice differs in a number of respects from that followe
Jan 1, 1979
-
Preliminary Results of the Detection and Identification of Glass Microsphere Taggants
By Paul Worsey, Delbert Da, Eric Achelpohl
The University of Missouri-Rolla is currently researching the concept of using glass microspheres in explosives as taggants as part of a 3-year technical project funded by the Bureau of Alcohol, Tobac
Jan 1, 2001
-
Progressive Development of Bulk Emulsion Explosives, Blast Application Improvements, and Blast Crew Training at the Ok Tedi Mine, Papua New Guinea
By Cam Grundstrom
The Ok Tedi Mine is a large open pit copper and gold mine located in a remote section of the Western Province, Papua New Guinea, with an annual rainfall of over 10 metres. Ok Tedi mines an average of
Jan 1, 1997
-
The Laboratory Determination of Dynamic Pressure Resistance of Cap-Sensitive Explosives
By Michael Wieland
Sharp transient stress waves generated during the delay blasting of underground coal can damage unfired borehole charges remaining in the delay pattern. These tremendous stress pulses in coal bear a s
Jan 1, 1990
-
Correlation Between Ground Vibration and Performances of Explosive (Ground Vibration by Underwater Explosion)
By Minoru Kawamura, Koichi Kurokawa, Yukio Kato, Kenji Hashimoto
It is well known that ground vibration by blasting is mainly related to a distance and charge weight. However, it is not known the correlation between ground vibration and performances of explosives;
Jan 1, 1991
-
Prediction and Determination of Explosive-Induced Fracture
By J R. Hearst, T R. Butkovich
Explosive-induced fracturing and permeability enhancement far from a free face were studied. A one-dimensional computer program, SOC, was used to predict the total failure-associated distortional stra
Jan 1, 1976
-
Increased Blasting Efficiency Through Operational and Geological Controls on Ore Particle Size
By W. Boas, R. Silva, D. Yumi, L. Steffen
The continuity of the flow and stages within the mining process is essential to achieve success in its operation and results, especially when it comes to a gold mine. During the first seven months of
Jan 1, 2024
-
Sources of Variability in Rock Hardness During Crater Blasting
By Bradley C. Paul
Similar rock formations exhibit great variability in resistance to fragmentation during crater blasting. This observation was made during an attempt to calibrate the Kuz-Ram blast fragmentation model
Jan 1, 1989
-
Explosive Demolition of Coolign Towers in the Netherlands
By B de Raadt
After discussing mechanisms of collapse for the explosive demolition of towers in general and cooling towers in particular, author comments upon a blasting operation in which four cooling towers were
Jan 1, 1978
-
Rugged Emulsion Explosive Formulation #37 - Candidate Permissible
By Michael S. Wieland, Thomas C. Ruhe
Delay blasting in underground coal results in shock waves traveling through the coal that can damage delay charges remaining in the blast pattern. Undetonated explosives which are dynamically desensit
Jan 1, 1992
-
High Speed Photography of Stope Blasting in South African Gold Mines
By P A. Gibson, J R. Brinkmann
The South African gold mining industry fires approximately 800 000 sloping blastholes daily. A programme aimed at characterizing the stope blasting process is underway in order to identify areas for i
Jan 1, 1985
-
Use of Explosives in Deep Rock Mining: In Situ Energy and Mineral Recovery
By D Larson, M Finger
Chemical explosives may become a key element in many of the in situ energy and mineral recovery methods under development. This paper discusses the potential role of explosives in deep rock mining for
Jan 1, 1976
-
Fragmentation Control Through the Attenuation of Explosively Produced Shock Waves
By S B. Richardson, N T. Moxon, A C. Torrance
In many mining situations the energy released by an explosive is far too high and results in over fragmentation and excessive damage to the surrounding strata. Laboratory experiments have demonstrated
Jan 1, 1989
-
The Origins and Effects of Inter-deck Pressure in Decked Blasts
By J. A. Rodgers, K. C. Whitaker
The time domain during which an explosive detonates and causes rock to fragment and displace is on the order of tens of milliseconds. Because of this, the dynamic processes that occur during this time
Jan 1, 2000
-
Mechanics of the Run up on Linear Shaped Charges Cutting
By Jason Baird, Seokbin Lim
Run up is a factor in Linear Shaped Charge (LSC) cutting for which an account must be made. It occurs on the initiation segment of the charge, and the cutting performance during this period is signifi
Jan 1, 2006
-
Instrumental Detection of a Climatologically-Induced Cosmetic Crack in Wall Covering
By Pierre-Alexandre Abeel, Charles Dowding, Justin Lueker
When blasting is eliminated as a cause of cosmetic cracking, often someone will ask, “If blasting didn’t cause the crack, then what did?” This paper describes detection by remotely operated instrument
Jan 1, 2015
-
A Study of Damage Profiles Behind Blasts
By K. G. Holley
Blasting is usually required to produce easily-excavated broken rock, while leaving surrounding rock masses as undamaged and stable as possible. In mining applications, it is common to utilise product
Jan 1, 2004
-
The Application of GPS Positioning and Drill Monitoring Technology
By Carl Hendricks
AQUILA Mining Systems Ltd. is the world leader in drill monitoring, control and GPS based drill navigation systems for the mining industry. This paper will review the general design and application of
Jan 1, 2002