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Risk Management to Prevent Coal Outbursts in Room-and-Pillar Mining under Deep Cover - RASIM2022
By Peter Zhang, Mark Van Dyke, Ted Klemetti, Morgan Sears
Room-and-pillar mining is a mining method used in the United States to extract coal from underground, and pillar recovery is widely practiced for maximizing coal recovery and mining economics. Under c
Apr 26, 2022
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Construction of an Underground Niche for TBM Repair and Permeation Grouting in Flooded Shaft—Ship Canal Water Quality Project (SCWQP) - NAT2024
By Francesco Chiappalone, Marco Invernizzi, Franco Gasperin, Brad Yoder, Fabrizio Fara
The Ship Canal Water Quality Project includes a 2.7-mile, 18-ft and 10-in internal-diameter tunnel that extends from Ballard to Wallingford, two popular neighborhoods in the West of Seattle. During th
Jun 23, 2024
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Application Of Ac Induction Motors With Variable Frequency Drives
By B. J. Sauer
Variable frequency drives (VFD’s), or adjustable frequency controls (AFC’s) as they are more precisely identified, have been available to the mining industry for over 20 years. However, in recent yea
Jan 1, 2002
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Copper Heap Leach Pad Performance: Geotechnical Lessons Learned Evaluation Of Several Heaps After 3 Plus Years Of Service
By C. J. Burkhalter, H. Andrade, T. C. A. Gardner, J. P. Campbell
During the 1990’s several copper heap leach facilities treating crushed and agglomerated oxide and sulfide ore were constructed in South America. The majority of these facilities have been in operatio
Jan 1, 2002
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Adsorption Of Hydrolizable Cations On Hydrophobized Silica
By S. Vivek
An Atomic force microscope (AFM) was used to measure the surface forces between hydrophobic silica surfaces. The measurements were conducted in the presence and absence of Cu(II)species in solution
Jan 1, 2003
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Masbate gold operation is site of first commercial heap leaching plant in Philippines
By Libby R. Ricafort, Victorio V. Pato, R. S. Pizarro
Introduction Atlas Consolidated Mining and Development Corp. (ACMDC) started gold production at its Masbate gold mine early in 1980. This involved an open-pit mine and a 3.5-k/d (3850-stpd) carbon-in
Jan 9, 1987
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Scheduling Fast-Track Tunnel Construction Projects - Introduction
By Valerie (Wollet) Rebar
Successful execution of fast-track projects is an arduous task at best. Effective and organized management, a comprehensive technical design with an independent check-and-balance system, and optimal s
Jan 1, 2008
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Probable Cost Estimating and Risk Management
By John Reilly
Costs of complex/underground projects have been consistently underestimated and delivery on time and on budget has been problematic. This has been attributed, to inadequate cost estimates and unidenti
Jan 1, 2008
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Short Startup for a High Pressure Mixshield Tunnel Boring Machine - RETC2021
By Matthew Burdick, Andrew Rule, Erica Bailey
The Second Narrows Water Supply Tunnel, Burrard Inlet Crossing project for the Greater Vancouver Water District entails deep shaft construction, subway sized pressurized face tunneling through highly
Jun 13, 2021
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Technology News – Automated-Plow Longwall Ordered for Chinese Coal Mine
German manufacturer DBT signed a contract to supply a sixth automated-plow long-wall system to Shenyang Coal in Liaoning province in northeastern China. This most recent order occurred just weeks aft
Jan 1, 2004
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Reclamation of Iron Ore Tailings; Innovations in Establishing Native Vegetation
By Natalie White, Joel Asp, Allyz Kramer
"Minnesota has robust reclamation standards and have proven results in the taconite mining industry. Reclamation of overburden spoils, lean ore spoils and fine tailings from taconite production has ge
Jan 2, 2018
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Transfer of German environmental expertise for mine site rehabilitation challenges worldwide - A case study: Vietnam
By R. Barthel, O. Nitzsche, J. Pateiro Fernández, T. Cramer
The Hong Gai coal field in northeast Vietnam has been the main coal mining area of Vietnam for more than 150 years. Anthracite coal is produced from several open pit and underground mines situated clo
Jan 1, 2011
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Influence of Iron Ore Sinter Base Mix Fines (− 0.150 mm) Size on Mineralogy and Physical and Metallurgical Properties of the Sinter - Mining, Metallurgy & Exploration (2021)
By M. SIDDARAJU, Rameshwar Sah, T. Umadevi, K. S. SRIDHARA, B. D. Ganesh Shetty, M. RAJU
The production of high strength iron ore sinter for blast furnace iron making unit was developed by optimizing the granulometry of less than − 0.150 mm fines in sinter base mix which consists of iron
Oct 16, 2021
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Thermodynamic Optimization Of Hydrogen Production For A Coal Based Power Plant With Zero Emissions
By Tuncel M. Yegulalp, Anuta Belova
This paper expands on the ZECA (Zero Emission Coal Alliance) technology, which is aimed at making coal a sustainable source of clean energy in the near future. The technology proposed immediate captu
Jan 1, 2005
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CFD Study On Hot Spot Location In Longwall Gob - Introduction - Preprint 09-064
By S. Lolon
Spontaneous combustion in underground coal mines has become a serious problem particularly in the caved area (gob). Recent statistic has shown that approximately 17% of total 87 underground coal mine
Jan 1, 2009
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Geotechnical Study For In-pit Coal Refuse Tailing Cells - SME Annual Meeting 2022
By M. B. Haggerty, R. J. Sheets, F. Abbasy
To address coal refuse tailings storage needs for a mine operation in western Canada, a feasible solution was to convert excavated open pits into tailings cells. A slope stability investigation and de
Mar 2, 2022
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Time-Dependent Monitoring of Seismic Wave Velocity Variation Associated with Three Major Seismic Events at a Deep, Narrow-Vein Mine "Mining, Metallurgy & Exploration (2021)"
By Erik Westman, BEN WESTON, SETAREH GHAYCHI AFROUZ, KATHRYN DEHN
One of the most difficult challenges in underground mining is to forecast significant seismic events prior to their occurrence in order to support the safety of miners and to minimize damage to the un
Oct 12, 2020
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Mining And Marketing Altered Volcanic Tuff At The Heart Of Nature?s Alum/Sulfur Mine
By John Heter
An alum/sulfur deposit (USDA organic registered) was mined underground for alunite (K,Na) Al3 (SO4)2 (OH)6 from the early 1900s to the 1930s. It is now being mined as an open pit quarry. A larger as
Jan 1, 2008
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Life-Of-Mine Schedule From Multiple Pits: Case Study For The Tenke Fungurume Mining District
By R. Benito
This paper describes the development of a life-of-mine schedule (LOM) for one of the world's largest known sedimentary copper-cobalt districts located in the Katanga Province, Democratic Republic
Jan 1, 2011
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Effects of Sulfuric Acid Dosage on the Baking of an Enargite Concentrate
By M. Sadegh Safarzadeh, Erich U. Petersen, Jan D. Miller
"An acid bake-leach process has been identified and applied to an enargite concentrate containing ~67% enargite, ~27% pyrite (FeS2), ~3% chalcopyrite (CuFeS2), ~6% sphalerite (ZnS) and <1% galena (PbS
Jan 1, 2015