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Some Thoughts on Calibrating LaModel
By Keith Heasley
In many practical situation where the LaModel program in used to analyze the mechanical response and failure of the mining environment, there are very few actual field measurement from the site availa
Jan 1, 2008
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Optimizing Secondary Tailgate Support Selection
A model was developed to facilitate secondary tailgate support selection based on analysis of over 100 case studies, compiled from two different surveys of operating longwall coal mines in the United
Jan 1, 1996
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Advancements in the Use of High-Modulus Polymer Mining Grids to Speed Longwall Recovery
By Thomas A. Bailey
Since the advent of longwall mining, various methods and materials have been used during relocation to control the intrusion of the gob in the shield/panline area. (figure 1) Controlling this gob is c
Jan 1, 2006
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A Method for Sizing Longwall Pillars Based on Field Measurements
By Christopher Mark
A new method for the design of longwall pillars, called "Analysis of Longwall Pillar Stability" (ALPS), is described. The method is the final result of a research program that included two major field
Jan 1, 1987
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The Next Generation of Cable Bolts for Improved Ground Support
By Stephen C. Tadolini
PC-Strand tendons, commonly referred to as cable bolts, have become a major rock reinforcement device for underground mining and civil applications. The most common configuration is a 1+6 strand, whic
Jan 1, 2012
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Evaluating Coal Pillar Mechanics Through Field Measurements (a8e6d7f0-5b83-40bc-b63c-ddaae2b3a526)
By Anthony Iannacchione
Designing coal pillars to provide resistance against overburden loads has long been an aim of rock mechanics engineers. The need for accurate pillar strength models has become more urgent as greater o
Jan 1, 1992
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Track Entry Deformation Subjected to Longwall Mining in the Overlying Seam: a Case Study
By Wenbing Xie
At Renlou Coal Mine, Huaibei Mine Area, the track entry deformed significantly after longwall mining in an overlying multiple seams. The supporting characteristics of primary roof bolts and shotcrete
Jan 1, 2012
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Rock Mechanics And Ground Control For Underground Mining And Construction
Recent improvements are described in several techniques for ground control in underground mining. Promising methods for analysis and mitigation of rockbursts are discussed. Methods of assessing damage
Jan 1, 1989
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Designing for Upper Seam Stability in Multiple Seam Mining
Historically, the selection of mining sequence for multiple seam conditions has been based on many factors other than ground control considerations and minimization of interaction effects. Today, nume
Jan 1, 1986
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Proposed Laboratory Quality Control Test Method for Resin Capsules Used in Underground Mines in South Africa
By Dave Minney
The South African mines health and safety regulations require that mine management establish a quality management system for rock support material. Quality control of resin capsules used as a support
Jan 1, 2007
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Longwall Recovery At Bailey Mine - Ground Control Challenges And Solutions (963204bd-df7d-40f3-9bd2-496636477d24)
By Daniel Su
This paper describes recent ground control challenges encountered at the longwall recovery areas of one of Bailey Mine?s two longwall faces and the proactive measures taken by CONSOL management and en
Jan 1, 2009
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Field Experience Of Measuring The Acoustic Energy From A Hammer Blow To Coal Mine Roof And Its Relationship To Roof Stability
By Peter Altounyan
The rate of decay of the energy from a hammer blow to a coal mine roof is related to the size and nature of the contacts between the rock being struck and its surroundings The use of this principle as
Jan 1, 2000
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Using Major Hazard Risk Assessment to Appraise and Manage Escapeway Instability Issues: A Case Study (d1d3dd49-2f0a-44af-8ddf-69de3f441c2d)
By Anthony Iannacchione
A Major Hazard Risk Assessment (MHRA) was developed in Australia after a series of mine disasters in the 1990?s. A MHRA is used to help prevent major hazards, i.e. fire, explosion, wind-blast, outbur
Jan 1, 2007
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Roof Pressure Monitoring Using The Integrated Longwalt Automation System By WESTFALIA
By Ulrich Paschedag
The WESTFALIA group of companies developer and manufactures underground mining machinery for complete high-performance longwalls. WESTFALIA uses a state of the art electrohydraulic system as the most
Jan 1, 1994
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Stability analysis and characterization of ground subsidence of abandoned lead-zinc mines in northeastern Oklahoma
By M. M. Zarnan
This paper presents the results of s study involving characterization of ground subsidence of abandoned lead-zinc mines in northeastern Oklahoma. Two coordinated efforts were undertaken: (1) collectio
Jan 1, 1989
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Estimation Of Long-Term Stability Of Mine Pillars In Underground Pit
By S. Yamashita
Recently in Japan, unexpected degradation (surface subsidence) at old underground quarry sites, such as 'Ohya-Ishi' (pumice tuff) pit field has often been occurred. At these quarry sites, th
Jan 1, 1996
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Cost Preventive System To Control Unstable Roof In Main Line Haulage Entries
By John Popovich
The MICON RokLok binder system including component and consolidation processes and safety and its first aide are described. The implementation procedures and selection of injection parameters are disc
Jan 1, 2001
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Strata Management with Ground Behavior Assessment for Mass Exploitation of Coal Deposits: A Case Study of Continuous Miner
By Sanjay Kumar Singh
The mechanics of load transfer in bord-and-pillar mining is not well understood despite the evolution of the art of pillar extraction over the last 20 years via trial and error (empirical) or Rock Mas
Jan 1, 2012
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The Design And Application Of Hercules Cribs For Underground Mining
By Mike Faure
Hercules cribs make use of timber loaded parallel and perpendicular to the grain. Maximum use is made of the orthotropic properties of timber resulting in crib- having superior strength, high initial
Jan 1, 1993
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Relocating Mining?Induced Seismicity at the Trail Mountain Mine
By Meagan S. Boltz
From October 2000 to April 2001 a local array of fourteen seismograph stations was deployed at the Trail Mountain Mine (TMM), an underground coal mine in Emery County, Utah, to locate mining-induced s
Jan 1, 2012