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Sunday, May 10, 2020 | History

3 edition of Pillar Load Transfer Associated with Multiple-Seam Mining. found in the catalog.

Pillar Load Transfer Associated with Multiple-Seam Mining.

United States. Bureau of Mines.

Pillar Load Transfer Associated with Multiple-Seam Mining.

by United States. Bureau of Mines.

  • 41 Want to read
  • 28 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 9066
ContributionsMatetic, R., Chekan, G., Galek, J.
ID Numbers
Open LibraryOL21737779M

NIOSHTIC-2 Publications Search - - Comparative Study of Pillar Load Transfer Associated With Multiple- seam Mining. The Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining operations within a multiple- seam configuration. Pillar load transfer associated with multiple-seam mining. Report of Investigations/ conducted longwall gate road stability studies at four mines in the Book Cliffs and Wasatch Plateau Coalfields of Utah. These operations are characterized by multiple-seam mining, abruptly varying cover depths to m (3, ft), and massive rigid.

This program is capable of combining mining data such as: multiple-seam and overburden stress, through the use of a boundary element program, LaModel; influence of immediate roof and other various.   To evaluate the potential interaction between the two mine works and to determine the pillar safety factor, Analysis of Multiple Seam Stability (AMSS) software was initially used to determine pillar dimensions to obtain a minimum safety factor of for areas under pooled water, as well as a minimum safety factor of for areas not under.

1. Introduction. Room-and-pillar mining accounted for about 40% of underground coal production in the United States in Pillar recovery, practiced in about one-third of the room-and-pillar mines, represents about 10% of the coal mined underground, yet it has historically been associated with more than 25% of all ground fall some U.S. coal fields, particularly central Cited by: 4.   Chekan et al. found that the ratio of the overburden to interburden thickness is a key factor influencing load transfer. Later, multiple seam interactions associated with longwall mining or interactions between room-and-pillar and longwall panels were investigated with a focus on their complex multiple-seam stress and displacement interactions Cited by:


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Pillar Load Transfer Associated with Multiple-Seam Mining by United States. Bureau of Mines. Download PDF EPUB FB2

Additional Physical Format: Online version: Matetic, Rudy J. Pillar load transfer associated with multiple-seam mining (OCoLC) Material Type.

Loading characteristics of pillars in multiple-seam mining operations [G. Chekan] on *FREE* shipping on qualifying offers. NIOSHTIC-2 Publications Search - - Pillar Load Transfer Associated With Multiple-seam Mining. The Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining operations within a multiple- seam configuration.

Pillar load transfer associated with multiple-seam mining / By Rudy J. Matetic, James A. Galek and G. (Gregory J.) Chekan. Abstract. Includes bibliographical references (p. 23).Mode of access: Internet. Comparative study of pillar load transfer associated with multiple-seam mining / By Rudy J.

Matetic and G. (Gregory J.) Chekan. Abstract. Bibliography: p. Mode of access: Internet Topics: Coal mines and mining., Mine subsidences., Pillaring (Mining.

COMPARATIVE STUDY OF PILLAR LOAD TRANSFER ASSOCIATED WITH MULTIPLE-SEAM MINING By R. Matetic 1 and G. Chekan 1 ABSTRACT The Bureau cf Mines, as part 0f a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining opej:ations within a multiple-seam con.

Multiple seam mining implies simultaneous working of more than one seam. The major problem encountered in this type of mining are related to ground control. These ground control problems. HAZARDS ASSOCIATED WITH MULTIPLE SEAM MINING Ground instability is usually the greatest hazard due to multiple load transfer from highly stressed remnant structures associated pillar mining”: Icu = - Z (1) Icu = N + 55 (2).

mining utilizing the bord and pillar method has been practised in South Africa before, but at a depth of less than m in the Witbank coalfields.

Multi-seam mining in thin seams has also been performed in the Natal coalfields at a depth of less than m, but mostly using bord and pillar mining and secondary mining (partial pillar extraction). The demand for increased productivity and the problems associated with mining at greater depths have increased the interest in using the yield pillar concept in the United States.

This paper summarizes chain pillar behaviour in a mine that historically experienced coal bumps in both room-and-pillar and longwall sections. Results indicate that, generally, the chain pillars yield as designed Cited by: 5.

The U.S. Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating interactions associated with multiple-seam mining. Two common interactions that occur between adjacent coalbeds are subsidence and pillar load transfer.

"The Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining operations within a multiple- seam configuration.

A comparative study was performed at two separate mine : Rudy J. Matetic, G. Chekan. Multi-seam mining The mining of multiple seams has long been practised at the Khutala Colliery.

By definition, ‘multi-seam coal mining’ is the mining of coal seams that overlay each other in a vertical depositional sequence. The seams are separated by rock strata known as parting3. The area of investigation for the new panelCited by: 3.

Su studied pillar load transfer mechanisms with the aid of finite element modeling. This work led to the following conclusions: Pillar shape influences the transfer of stress: A rectangular pillar will transfer less load, and also, the interactive distance will be less than would be the case for a square pillar of equal load-bearing capacity.

The Bureau of Mines, as part of a program to improve mine planning and development is currently investigating interactions associated with multiple-seam mining. Two common interactions that occur between adjacent coalbeds are subsidence and pillar load by: 1.

Comparative study of pillar load transfer associated with multiple-seam mining (OCoLC) Online version: Matetic, Rudy J. Comparative study of pillar load transfer associated with multiple-seam mining (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors.

Additional chapters/articles from the SME-ICGCM book 28th International Conference On Ground Control In Mining Evaluation And Design Considerations For Pillar/Roof Separat Bolt Profile Configuration And Load Transfer Capacity Optimi Stability Mapping To Examine Ground Failure Risk: A.

"The Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining operations within a multiple- seam configuration.

multiple seam mining success was proposed by Chanda (). Chekan et al. () found that the ratio of the overburden to interburden thickness is a key factor influ-encing load transfer. Later, multiple seam interactions associated with longwall mining or interactions between room-and-pillar and longwall panels were investigated.

Chekan et al. () found that the ratio of the overburden to interburden thickness is a key factor influencing load transfer.

Later, multiple seam interactions associated with longwall mining or. ri / pillar load transfer associated with multiple-seam mining, pb, $ 38 ri / damping properties of selected steels and cast irons, pb, $ 15 ri / fine grinding of coal by the turbomilling process, pb, $ 5 ri / capability evaluation of the radial-axial splitter, pb, $ Comparative study of pillar load transfer associated with multiple-seam mining / (Pittsburgh, Pa.: U.S.

Dept. of the Interior, Bureau of Mines, ), by Rudy J. Matetic and G. J. .Design considerations for multiple-seam mining with case studies of subsidence and pillar load transfer. Proceedings of the 28th US Symposium on Rock Mechanics, University of Arizona, Tucson, AZ.