2 edition of Effects of abandoned multiple seam workings on a longwall in Virginia found in the catalog.
Effects of abandoned multiple seam workings on a longwall in Virginia
G. J. Chekan
Bibliography: p. 14.
|Statement||by Gregory J. Chekan, Rudy J. Matetic, and David L. Dwyer.|
|Series||Report of investigations ;, 9247, Report of investigations (United States. Bureau of Mines) ;, 9247.|
|Contributions||Matetic, Rudy J., Dwyer, David L.|
|LC Classifications||TN23 .U43 no. 9247, TN319 .U43 no. 9247|
|The Physical Object|
|Pagination||15 p. :|
|Number of Pages||15|
|LC Control Number||89600037|
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Auction Digest V O L U M E 1 0 F A L L 2 0 1 3 Board Members: William C. Bryant, III George A. Daniel Larry Linkous E. Joanne Wang * * Citizen Member Mr. Linkous has been in the auction business in Virginia since , when he founded Linkous Auctioneers. He was one of the first certified auctioneers in the Commonwealth. Received 18 July ; accepted 06 October *Corresponding author. Tel: 86 E-mail address: [email protected] doi: /S(09) Environmental issues from coal mining and their solutions BIAN Zhengfu 1,*, INYANG Hilary I 2, DANIELS John L 2,3, OTTO Frank 4, STRUTHERS Sue 5 1 Institute of Land Resources, China University of Mining & Technology, Xuzhou Cited by:
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Additional Physical Format: Online version: Chekan, G.J. (Gregory J.). Effects of abandoned multiple seam workings on a longwall in Virginia. Pgh. EFFECTS OF ABANDONED MULTIPLE SEAM WORKINGS ON A LONGWALL IN VIRGINIA By Gregory J.
Chekan,1 Rudy J. Matetlc,1 and David L. Dwyer ABSTRACT In order to reduce waste and improve resource conservation, mine planning, and development, the U.S. Bureau of Mines is investigating multiple seam interactions associated with longwall mining. Effects of abandoned multiple seam workings on a longwall in Virginia [G.
Chekan] on *FREE* shipping on qualifying offers. Effects of abandoned multiple-seam workings on a longwall in Virginia Technical Report Chekan, G.J. ; Matetic, R.J. ; Dwyer, D.L. In order to reduce waste and improve resource conservation, mine planning, and development, the U.S.
Bureau of Mines is investigating multiple-seam. Effects of abandoned multiple seam workings on a longwall in Virginia Book Chekan, G.J. ; Matetic, R.J. ; Dwyer, D.L. In order to reduce waste and improve resource conservation, mine planning, and development, multiple seam interactions associated with longwall mining is being investigated.
Surface fracture development over longwall panels in south-central West Virginia / (Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, ), by David K.
Ingram (page images at HathiTrust) Effects of abandoned multiple seam workings on a longwall in Virginia / (Pgh. Effects of abandoned multiple seam workings on a longwall in Virginia. Published Date: Longwall gate entry and panel stability have been influenced by previous mining in coalbeds above and below a mine in Virginia that operates in the lower banner coalbed.
Directly superjacent, approximately ft, the upper banner coalbed has been Cited by: 1. Longwall mining. See also what's at Wikipedia, your library, or elsewhere. Broader term: Coal mines and mining; Used for: Mining, Longwall; Longwall method of mining; Filed under: Longwall mining Longwall gate road roof instability and methods of control in the lower Kittanning Coalbed of Central Pennsylvania /, by Eric R.
Bauer, E. Krupa, and Jeffrey M. Listak (page images at HathiTrust). Longwall mines produce more than 30 pct of all underground coal, up from 5 pct just 15 years ago.
The continued growth of longwall mining without appropriate multiple-seam planning may increase the cost and risk of mining. Optimization of the mine design factors is arguably the primary means for controlling interactions between operations. Analysis and design considerations for superimposed longwall gate roads [microform] / by Gregory J.
Chek Effects of abandoned multiple seam workings on a longwall in Virginia [microform] / by Gregory J. Cheka Interactions between multiple seam longwall and room-and-pillar operations [microform]: a.
depth to the seam, seam height and excavation width. multiple seam mining effects; Generally the deeper the workings, the longer the time will be for complete subsidence to be registered.
In various cases, multiple years () are required for deep workings (> m), and a few years for depths. in longwall workings”, Computers and Geotechn pp–,  B. Zamarski, “Control of roof in longwall faces of Ostrav a-Karvina Coal Basin”.
Report of Coal Research. In this study, the vertical stress of the interburden over an abandoned pillar working was first investigated. The mechanical model of the interburden was established and the damage conditions.
Immediately after Abandoned in Virginia was published on Facebook last March, contributions began to pour in. Here are some highlights of the photos submitted by others to the page on day one, March 3, If you recognize the location of any of the unidentified settings, feel free to comment with the city or county but please do not identify the specific location of abandoned old.
The abandoned mines represent coal mine workings abandoned after the year because of concerns about availability of records (abandoned mine maps, locations of shafts, wells, etc.), and because of issues relating to physical deterioration of the abandoned workings and their ability to contain injected gas (i.e.
ability to maintain a seal). EPA/^ February FEASIBILITY STUDY OF A MEW SURFACE MINING METHOD "LONGWALL STRIPPING" By Henry F. Moomau Frank R.
Zachar and Joseph W. Leonard Contract No. Program Element No. IBBQij-O Project Officer John J. Mulhern Mining and Land Modification Branch Office of Research and Development Washington, D.C. 2C Prepared For Office of.
In some regions of the U.S., there are multiple coal seams that have been mined. A coal seam is considered mineable by underground methods when it is at least 30 inches thick.
Because of the number of mineable seams in West Virginia and Pennsylvania, these. As coal mining methods and activities have changed over the years, the effects on the geologic conditions have also changed. Underground operations have grown from small family mines to obtain house coal for heating to large, commercial operations, and the respective mining methods have changed from narrow, hand-cut tunnels, through room-and-pillar mines with pillars left in the mines to.
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longwall working carried out in the Parvade-2 coal mine of Tabas, Tabas, Iran. The results obtained show that there is a good agreement between the values obtained by the new model and the actual measured values. Finally, a sensitivity analysis is carried out on the effects of pillar width, bearing capacity of support system, and coal seam : H Mohammadi, Ebrahimi Farsangi, H Jalalifar, A R Ahmadi, A Javaheri.
Final § (a)(1)(ii) addresses new requirements that seals constructed to separate the active longwall panel from the longwall panel previously mined be designed using a pressure-time curve with a rate of pressure rise of at least 50 psi in second, and that a minimum overpressure of at .Principle of retreating longwall Because the gate roads are long, it is normally necessary to drive at least two (sometimes more) at each side of the block.
That set of roadways which will be used for access onto the longwall and for coal clearance off the longwall are typically called the "maingate roadways" whilst the other roadway or set of.revised edition, Oxford Book company, Lessing, P., and Hobba, Jr., W.
A., “Abandoned Coal Mines in West Virginia as Sources of Water Supplies,” West Virginia Geologicial and Economic Survey, Circular Number C, Morgantown, West Virginia, Manual of Manuals, Summary and Information for Eight Laboratory Analytical Chemistry.