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Development Of A Subsidence Database And Determination Of Subsidence Parameters
By Syd S. Peng
A total of 209 cases of subsidence data over longwall panels in 16 US coal seems have been collected and built into a subsidence database. The database is developed under MS Windows environment. It us
Jan 1, 1995
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Research, Development, And Use Of Steel-Fiber-Reinforced Concrete Cribbing For Mine Roof Support
By Dale A. Didcoct
Through the combined efforts of the C. S. Bureau of Mines, the coal industry, and Burrell Construction and Supply Company, New Kensington, PA, a steel fiber reinforced concrete crib block to improve c
Jan 1, 1982
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Applications Of Cement Grouting Method For Controlling Weak Strata
By Herryal Z. Anwar
In recent years, many both mining and civil engineering projects are developed in the area which may be categorized unstable, such as fractured and jointed rocks or "water sensitive rocks". For exampl
Jan 1, 2000
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Roof Bolt Bond Tester; A Device For Nondestructive Testing Of Grouted Bolts
By Raymond M. Stateham
The Bureau of Mines has developed a portable, lightweight device for determining the integrity of resin-grouted roof bolts. The instrument functions by sending a known pulse of ulstrasonic energy into
Jan 1, 1982
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Influence Of Partings In A Coal Seam On Long Term Pillar Stability
By K. Biswas
So far, all pillar design methods or approaches consider the coal seam as a uniform structure From some mine visits in northern Appalachian Region. it is found that some coal seams have binder or part
Jan 1, 1995
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Underground High Resolution Seismic Method As A Low Cost Alternative For Mapping Sandstone Replacement Channels In Coal Mines
By Rene Rodriguez
Sandstone paleo-channels encountered during coal mining operation can significantly slow down the advance in mining, and often completely shut-down coal mine production, with consequent extensive econ
Jan 1, 1994
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Gob Canopy Roof Support for Difficult Natural Conditions
By Jay Hilary Kelley
This paper proposes a modification of longwall roof support to meet new difficult mining conditions that are anticipated in the future. A gob canopy is a movable appendage attached on the rear of a lo
Jan 1, 1997
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Ground Deformation In The Case Of Underground Mining Of Thick And Dip Coal Seams In The Jiu Valley Basin
By Gheorghe Oncioiu
The phenomena developed on the influence of thick coal seam no.3 mining, by horizontal slices and rocks caving roof control, in the Jiu Valley coal basin, are very complex. By analyzing the influence
Jan 1, 1999
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Systems Used In Coal Mining Development In Long Tendon Reinforcement
By Brian Clifford
A wide range of different cablebolt systems are available and in use in hard rock and coal mines around the world. The birdcaged cablebolt was initially used in UK coal mines in conjunction with ro
Jan 1, 2001
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Field Test with Strain-gauged Friction Bolts at the Gold Hunter Mine, Mullan, Idaho, USA (f62ddf9f-aabd-4681-8d92-4a50602e035c)
By Jeffrey Johnson
To measure the loading behavior of friction bolts, researchers at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) installed strain gauges on the in
Jan 1, 2003
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Remote Control Roof Bolting
By Cosmo P. Fazio
Remote control roof bolting is approaching reality with the continued improvement of a number of components and subsystems being developed by The Bendix Corporation under sponsorship of the U.S. Burea
Jan 1, 1982
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Development and Application of Impact-Resistant Lagging for Steel Sets Installed at Underground Roof Fall Areas
By Kevin Jinrong Ma
Underground mines often experience roof falls in entries, crosscuts, and intersections of active mining sections, main travel ways, and belt entries. Roof fall heights greater than 20 ft (6 m) make re
Jan 1, 2011
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Geotechnical Investigation For A Single Entry Design For Longwall Mining
By Madan M. Singh
Currently longwall coal mining operations require at least 3 entries on both the headgate and tailgate ends because of ventilation and safety requirements. Driving of entries, however, is a slow and c
Jan 1, 1982
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Case Study of Conditions Observed During the Removal of a Highly Fractured Roof Beam in Bedded Halite
By Liane J. Terrill
A 9O) ft (275 meter) section of a highly fractured beam of halite was mined from the roof of a supported thirteen year old drift at the Waste Isolation Pilot Plant (WIPP). The operation was conducted
Jan 1, 1997
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A Comparison Of Overburden Response Due To Longwall Mining
By David K. Ingram
The objective of this U.S. Bureau of Mines (USBM) investigation was to characterize overburden response due to longwall mining. Subsurface strata and surface deformations were monitored at two sites i
Jan 1, 1994
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Analyses of Valley Fill Slope Stability - Three Case Studies
By Shiva P. B. Kolli
Surface mining of multiple scams by mountaintop mining methodology is complex in the Appalachian region of West Virginia. Excess spoil from the removal of overburden and interburden is disposed in the
Jan 1, 2001
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Development Cooperation Between Operator And Manufacturer - Point Anchor Resin Bolts
By C. C. White
Much benefit can be achieved by a mining company and a manufacturer if both parties can communicate effectively with each other and assist in product development; mutually beneficial ideas and product
Jan 1, 1982
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Seismic Events Due To Underground Mining Activities
By R. Fritschen
In order to investigate locations, source parameters, and source mechanisms of mining induced seismic events, a local network of seismic stations was installed at a coal mine in the eastern part of th
Jan 1, 1999
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Application Of Mechanical And Groundwater-Flow Models To Predict The Hydrogeologic Effects Of Longwall Subsidence - A Case Study
By Danny J. Van Roosendaal
An investigation was undertaken to determine hydrogeological effects of subsidence over a longwall coal mine in the Illinois Basin. At this mine, approximately 200 ft of bedrock overburden is overlain
Jan 1, 1995
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Current Trends In Roof Truss Hardware
By C. P. Mangelsdorf
The success of the Birmingham roof truss (Figure 1) in supporting some difficult roof conditions, particularly in the Illinois coal basin, has given impetus to the development of a number of alternate
Jan 1, 1982