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Changing Powder Distribution in the Highwall Holes Reduces Overbreak and Rockfall HazardsBy Virgil J. Stachura, Calvin L. Cumerlato
The Bureau of Mines conducted a series of tests to develop a blasting method that would reduce overbreak and rockfall hazards at a limestone quarry in northeastern Wisconsin. Reductions in overbreak w
Jan 1, 1989
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The Engineering Significance of Shrinkage and Swelling Soils in Blast Damage InvestigationsBy Wendell W. Harris, Stanley J. Vitton
In the United States each year it has been estimated that expansive soils cause approximately $9.0 billion in damage to buildings, roads, airports, and other facilities. This figure alone exceeds the
Jan 1, 1996
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Explosives & Accessories Used in the Isthmus of Mexico to Break Up & Fissured the Lime/Stone/Sulphur StrataBy Antonio S. Aldana Selders
With special designed explosive and a system to lower down a heavy load of Explosives through 8" pipe results are achieved, the stimulation of sulphur production takes place. Well # 18-1063 at 515 met
Jan 1, 1995
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Delineating Extent of Cracks in Post-Blast Rock Surface Using GPR – A Case StudyBy Sayantan Chakraborty, Kaushik Dey, SaKaushik Dey tyabrata Behera
Drilling and blasting is a popular excavation technique in the drift of underground mine. Faster completion of drift reduces the gestation period and thus longer blast pulls are attempted with longer
Jan 1, 2019
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Influence of Street Intersections on Blast Channeling and Diffraction EffectsBy Joshua Hofman, Braden Lusk, Erin Morris
Explosions in urban environments, whether of accidental or malicious cause, often result in extensive injuries, loss of life, and property damage. The ability to predict the damage inflicted by these
Jan 1, 2012
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A New Blast Vibrations Analysis MethodologyBy Francisco Sena Leite, Raquel Sobral, Vinicius Gouveia de Miranda, Céu Jesus
"The urgent need for improvements in the control and mitigation of environmental and social conditions associated with the extraction and processing of raw materials is increasingly a demand imposed b
Jan 1, 2017
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Underwater Explosions - Particle Size Effect Of Al Powder To The Energy Content Of An Emulsion ExplosiveBy Martti Hagfors, Jussi Saavalainen
The underwater explosions has been used as a test method for the determination energy content of explosives. The test method is suitable for all kind of explosives; homogeneous, heterogeneous, wa-ter-
Jan 1, 2010
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Comparison of Micro-Inch In-Plane and Out-of-Plane Resoponse of Cracks to Blast Vibration and WeatherBy Jeffrey Meissner, Mike Waldron, Charles Dowding
Most studies of crack response have focused on opening and closing of a crack in the plane of the wall in which the crack occurs. Crack movement also occurs perpendicular or normal to the plane of the
Jan 1, 2010
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Integration of Big Data from Drilling and Blasting for Plant Throughput Optimization at Constancia MineBy Hernan Escalante, Jonathan Alvis, Paulo Alcazar
Constancia Mine, operated by Hudbay Perú and located in the district of Velille, Chumbivilcas province, Cusco, is an open-pit operation characterized by low-grade ore. In this context, operational eff
Jan 26, 2026
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Improvement of the technology for performing blasting works in Studena quarryBy Valeri Mitkov
Studena Quarry is one of the main suppliers of inert materials for concretes production in Sofia. It is characterized by massif heterogeneity in density and fissuration. Failure to take into consider
Jan 1, 2010
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Blast Densification to Prevent Soil Liquefaction in Volcanic Avalance Debris for Construction of the South Coldwatercreek Bridge, Mt. St. HelensBy Ron J. Elliott, David G. Otto
This project involved deep blast densification of recent volcanic avalanche debris deposits consisting of a 43 meter thickness of loose clean to slightly silty sand, gravel, cobbles and boulders depos
Jan 1, 1994
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A New Method to Calculate the Frequency Associated with the Peak Particle Velocity of the Vector SumBy Ruilin Yang
The vector sum peak particle velocity (PPV) of blast vibrations describes the blast vibration intensity more completely than the PPV of a single component waveform. It is more logical to use a vector
Jan 1, 2015
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Low Strength Water Gel ExplosiveBy Michael M. Jackson
"The mining industry has for some time compared explosive energy requirements to theresults obtained using ANFO. Drill patterns, powder factors, and explosive bulk strengthshave all been developed bas
Jan 1, 1993
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Underground Limestone Mining at the Portal-Access Okolona QuarryBy William C. Pearson
In past years, the usual justification for underground mining of limestone has been the depth of the overburden, perhaps 100 feet thick or more. At our Okolona Quarry in suburban Louisville, Kentucky,
Jan 1, 1983
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Development of Ammonium Nitrate-Free Mining ExplosivesBy Italo Onederra, Miguel Araos
"Most of the current explosives for mining blasting activities are based on ammonium nitrate (ANFO, emulsions and watergels). AN-based explosives’ detonating properties were discovered in the 50’s and
Jan 1, 2017
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Effect of Blasting Vibrations from Deck Blasts on Pit Wall Stability (Blasting and Fragmentation Vol. 11, No. 1, 2017)By B Mohanty, A Siamaki, K Esmaeili
Large scale open pit mining and quarrying operations dictate safe and reliable pit wall stability. The current approach of employing the particle velocity-scaled charge distance approach to estimate a
Jan 1, 2017
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Process Intensification of Emulsion ManufactureBy Shuli Teng, Vladimir Sujansky, Matthew Rawls, Ivan Junarsa
In recent years significant advances have been made in chemical processing technology. In particular, process intensification using micro-technology has had some success in changing and improving chem
Jan 1, 2014
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Detonation of Non-Electric Initiation Systems Across an Air GapBy B. Winterberg, C. Lewis, M. Starkel, C. Johnson
Non-electric systems, specifically shock tube, have become the pyrotechnic detonator of choice over electric due to their safety regarding accidental initiation from stray radio signals. Typically, th
Jan 1, 2024
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Subdrill – The Underutilised Blasting ParameterBy Stephen Mansfield
In metalliferous mining operations, subdrill is that portion of the blast hole that is drilled below the target grade elevation, and in most cases loaded with explosives. Its primary aim is to enable
Feb 1, 2020
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Use of Visualization Tools for Drill and Blast ActivitiesBy Carlos Alvarado, Hernan Narea, Jhon Silva, Bryan Townsend, Katherine Gil, Brayan Caceres, Felipe Pontanilla
With the promising development of new technologies, automation in Drill and Blasting (D&B) is on the horizon. The data generated in all D&B activities, which is currently segregated, can be linked to
Jan 21, 2025