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Mine Stability Evaluation From Microseismic Activity (5cc6a13d-fd4e-4c74-a7d1-2213b7f2a1da)
By Brian R. A. Wood
Any defect activity resulting from an applied stimulus on a structure will generate a stress wave which travels in the medium under the laws of acoustics, thus the name of acoustic emission (AE). AE t
Jan 1, 1992
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Integrated Instrumentation Method of Stress State, Material Property, and Deformation Measurement for Stress Control Method of Mining
By Shosei Serata
The application of conventional rock mechanics methods to complex ground is very difficult. Yet. In most underground mining, the ground is complex. Therefore. conventional methods are not only difficu
Jan 1, 1986
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Application Of Time Domain Reflectometry To Mining
By Kevin M. Connor, Malcolm J. McPhersqn
Examples are presented in which Time Domain Reflectometry (TDR) was employed to locate deformation of rock masses induced by mining. The first example involved motoring the propagation of overburden f
Jan 1, 1984
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Correlation of Acoustic Emission (A.E.) with Physical and Mechanical Properties of Different Types of Rock and Coal Specimens
By Brijes Mishra
This paper presents a correlation of acoustic emission (A.E.) with physical and mechanical properties of different types of rock and coal specimens which were tested under aegis of a consultancy proje
Jan 1, 2006
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Massive Pillar Collapse: a Room?and?Pillar Marble Mine Case Study
By Sandin E. Phillipson
The Mine Safety and Health Administration?s Roof Control Division responded to a massive ground failure at an underground marble mine in northern Georgia. The ground failure occurred in a benched area
Jan 1, 2012
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Rock Mechanics Investigations on Seismic Events Around Two Longwall Coal Operations
By Michael Alber
Coal mining by the longwall method typically causes seismic events. This paper describes the research on mining induced seismicity around two specific longwalls at 1100m depth under several old longwa
Jan 1, 2008
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Three-dimensional FEM analysis to sale field measurements from deep mine accessways
By M. J. Beus
A shaft is truly the "lifelinen of an underground mine. Damage to the shaft lining and guides as a result of ground movement can result in serious loss of production and extensive and continual repair
Jan 1, 1989
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Evaluation And Design Considerations For Pillar/Roof Separation In An Operating Coal Mine (3e69124f-30b4-40c5-9503-bd59304b248f)
By Mike Amick
As virgin coal reserves dwindle, more and more mines are being opened in areas with previous mining. As addressed in this conference before, there are solutions available for designing mines extracti
Jan 1, 2009
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Mining Through In-panel Entries and Full-face Recovery Room Without
By John Smyth
Mining through in panel entries and the full face recovery method has been successfully practiced at U.S. Stwl, Mine 50. Suppat of the cut-through entries and recovery room is critical. Traditionally,
Jan 1, 1998
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Technique To Measure Resultant Load Vector On Shield Supports (b937ef33-c51b-4de4-a956-dc8be749fea8)
By Thomas M. Barczak
The resultant load vector is the representation of the forces applied to a longwall roof support element by caving strata into a single, quantifiable measure of support resistance. The relatively comp
Jan 1, 1984
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Proposed Criteria For Subsidence Damage To Buildings (d2ee0f1e-295b-4fb1-ab17-d19f1e17df4a)
By Swapan Bhattacharya
United States federal and state regulatory authorities require underground mine operators to adopt adequate measures to minimize material damage to the surface caused by nine subsidence. This paper pr
Jan 1, 1984
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Development of a mechanistic model for prediction of maximum subsidence and subsidence profile due to longwall mining
By Richard D. Begley
This paper summarizes the development of a mechanistic model to predict longwall mining induced surface subsidence. The model was originally developed from data acquired from a recent field study cond
Jan 1, 1989
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Automated Monitoring Of Rock Slopes And Waste Dumps
By Andrew G. Martin
In 1991, Modular Mining Systems began marketing a Slope Monitoring System (SMS) now installed at twelve mines. The SMS uses automated wire line extensometers to monitor field conditions frequently. Ev
Jan 1, 1996
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An Overview Of The National Roof Evaluation Accident Prevention (REAP) Program
By J. M. Krese
This paper gives an overview of the National REAP program emphasizing the program's current status and future plans. A brief historical review of the program will be given containing roof-fall ac
Jan 1, 1988
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Subsidence Misconceptions And Myths
By Richard E. Gray
Subsidence due to coal mining is poorly understood by non-specialists. This has led to numerous misconceptions and myths based on limited observations and lack of knowledge. The three most common are:
Jan 1, 1996
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Investigation of the Stability of a Pillar Retreat Section at the Fletcher Mine
By Doug Tesarik
Researchers from the National Institute for Occupational Safety and Health1 (NIOSH), together with employees from The Doe Run Company, are monitoring and evaluating the stability of a pillar retreat s
Jan 1, 2006
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Surface damage due to longwall mining - A case study
By P. M. Lin
A subsidence monitoring program over a longwall panel was established (1) to explore the impacts of dynamic subsidence on the ground surface and structures and (2) to correlate the movements between t
Jan 1, 1989
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Coal Mine Bumps: Case Histories of Analysis and Avoidance
By David Newman
In Eastern Kentucky, the Darby seam has had an extensive history of coal bumps and pillar bursts. The combination of high overburden, strong rock and coal, subjacent and superjacent mines, and retrea
Jan 1, 2008
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Insitu Performance of One Step Bolts to New Zealand Thick Coal Seam Mining Environments
By Richard Campbell
Effective strata control, utilising fully encapsulated resin grouted roof bolts is dependent on the installed quality of the reinforcement elements. Resin based grouts are the main form of rock bolt
Jan 1, 2006
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Longwall Shield Recovery Using Mobile Roof Supports (64264c53-830d-4e84-b91e-78532103884a)
By Frank Chase
Longwall mining has gained the reputation as being the safest extraction method in underground coal mines. However, one of the most difficult tasks associated with longwall mining is moving the face
Jan 1, 2007