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Evaluating the Fragmentation Data from Copper and Gold Mines
By Sedat Esen
"This paper presents a critical review of the fragmentation data obtained from some large open pit copper and gold mines. Database ncludes 35 mines with Uniaxial Compressive Strength values ranging fr
Jan 1, 2017
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Blasting Seismographs: Transfer Functions, Standards and Accuracy
"In this work a blasting seismograph was tested on a vibration shaker controlled by a single-point laser Doppler vibrometer (LDV). A total of 43 tests were made to measure the transfer properties(tran
Jan 1, 2017
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Rock Fragmentation Modeling Using a Neural Network-Based Approach in a Gold Open Pit Mine
By Cesar Guerra, Alejandro Rojas, Dr. Jhon Silva, Luis Velasquez
The ANN method is applied to predict the P_80 size in one open pit gold mine in Peru. The ANN was implemented in Matlab programming language, and the results from the ANN are compared with data obtain
Feb 1, 2020
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Journal: Safety Talk / MSHA Winter Alert Beat Winter Hazards, Win with Winter Alert
By MSHA website
“Conditions at underground and surface coal mines can change dramatically during the winter months,” said Joseph A. Main, assistant secretary of labor for mine safety and health. “We must be ever mind
Jan 1, 2011
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Emulsion Breakers for Waste Explosives
By Maja Franjic, Ian Tolliday, Chris Collins, James Wiltshire
Ammonium Nitrate Emulsions (ANE) are a large segment of the explosives market for the mining industry. These emulsions are generally designed to be very stable but when breakdown does occur, removal o
Jan 21, 2025
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Flyrock Elimination Program Part 2: Profilers and Boretracks
By Eric Roller, Elliott Giles
All flyrock incidents have the potential to result in injuries or fatalities that can result in loss of company reputation, license to operate with clients, and bear the exposure to high cost liabilit
Jan 1, 2012
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Evaluation of Blast Vibrations from Sekkoy Surface Coal Mine In Turkey
By H. Bilgin, Sedat Esen
In this paper, the ground vibrations induced by blasting for stripping work at Sekkoy Open Cast Coal Mine belonging to TKI Yenikoy Lignite Mine (YLI) are investigated and the procedures for monitoring
Jan 1, 2001
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Recent Projects: New Technique for Silo Removal
By Bert Bahnson
As farms decrease and subdivisions increase there is a continuing demand for easy and safe silo removal. A few years ago I attended one of the Omni istribution explosive classes and was impressed by
Jan 1, 2006
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Tehachapi, CA, Double-Track Project, Rock Slope Design and Excavation
By Thomas Pallua, William C. Gates
"Two major railroad companies have identified several segments along the railroad corridor betweenTehachapi and Bakersfield, Kern County in California that require construction of a second track to im
Jan 1, 2017
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Journal: Coal Creek rebirth: Just add explosives
By Michael Milstein
Northwest Research Station said as more and more older dams are removed to benefit fish, it’s become clearer that rivers rework themselves quickly.“Where the dam is relatively small, it’s a quick resp
Jan 1, 2010
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Ground Reaction Time Measurement and Modelling for Improved Blast Outcomes
By Richard Turnbull
Maules Creek mine is an open cut coal near Boggabri in the Gunnedah Basin of New South Wales, Australia. The mine is currently operating at an annualised run rate of 9.5Mt of saleable coal. The plan i
Jan 1, 2018
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Implementation of narrow veins mining in a zinc mine
By M. Gonçalves Peixoto da Silva, E. Rodrigo Carvalho Souza Siqueira
Mining in narrow veins is commonly applied for precious metals, generally carried out to extract gold in underground mines, due to the ore occurrence on narrow veins, mainly up to 2-meter large. The c
Jan 21, 2025
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Fragmentation Optimization Techniques using 5.5 inch Hole Plugs at the Holcim Cement – St. Genevieve Quarry
By Douglas Bartley
As the economy continues to slowly recover, our industry continues to finds ways to increase productivity while being forced to cut costs. The drilling and blasting process is the starting point of an
Jan 1, 2012
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Blasting soft, plastic mineral inside a silo at a copper mine
By Benjamin Cebrian
Metallurgical testing at Cobre Las Cruces prior to production at the mill was done with overburden gossan. Some of that test gossan was a very fine material, wet by the water conditions at the bottom
Jan 1, 2010
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Rapid Advances in Electronic Initiating Systems
By Andre Koekemoer, Gys Landman
At the moment, electronic initiation is migrating from a position of a specialist niche to that of a more widely applied technology. Ease of use and deployment rate are becoming aspects of greater con
Jan 1, 2011
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O'Shaughnessy Dam Hydroelectric Project
By Alan Hooper, James E. Mischler
Construction began in 1984 for a 5 megawatt hydroelectric power retrofit at the O'Shaughnessy Dam for the City of Columbus, Ohio. The construction necessitated excavation of limestone bedrock up to 27
Jan 1, 1986
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Initial Testing of a Speed of Sound Test Apparatus for Powdered Explosives
By Barbara Rutter, Shonn Kevin McNeil
"This study discusses how a prototype was built to measure the sonic velocity in powdered explosives.The sonic velocity of an explosive is a benchmark to determine if the explosive deflagrates or deto
Jan 1, 2017
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Blasting for Wall Control and Stability using Electronic Detonators at the Bald Mountain Mine, Nevada
By Kurt Oakes, John Williams
Placer Dome, US operates the Bald Mountain Mine. The Bald Mountain Mine is a surface operation located in remote northwestern White Pine County in east-central Nevada, approximately midway between Elk
Jan 1, 2004
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HMX Based Electronic Initiation System for Blasting in High Temperature Ground and/or Extremely Reactive Ground Phase 2 – Blasting Campaign in Western USA
By Karl Dufresne
Blasting in geothermally high temperature ground and/or extremely reactive ground is an increasing common challenge for surface and underground mines. Many current PETN based non-electric and electron
Jan 21, 2025
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Pyrotechnic Mortar Pressure and Exit Velocity Study
By R. Sibley, K. Perry, E. McCorkle, M. Coy
Black powder has been used in fireworks since the 10 th century in China. To this day, black powder still has a variety of uses, including fireworks, and remains relatively unchanged. Black powder is
Jan 1, 2024