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Longwall and Room-and-Pillar Productivity: A Review of U.S. Coal Mines.


PB94150604

Publication Date 1994
Personal Author Bhatt, S. K.
Page Count 14
Abstract Although overall worker productivity for U.S. underground coal mines is available, productivity by mining method and seam thickness is not. Mining technology has gone through dramatic changes in the past decade and the industry has experienced a lack of accurate productivity figures addressing these changes. The information is of great interest in planning for future mining systems as thick and shallow coal seams currently being mined are depleted and exploitation of thinner, deeper, and better quality seams is considered to partially meet the requirements of 1990 Clean Air Act Amendments. In a cooperative program, the U.S. Bureau of Mines obtained raw mine level production and related data from the Energy Information Administration for 1989 and 1990 and performed the needed statistical analysis. Base criteria, parameters, and salient results of the mine productivity analysis are presented in the report.
Keywords
  • Coal mining
  • Productivity
  • Room and pillar mining
  • Caving mining
  • United States
  • Coal seams
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
Corporate Authors Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes Library of Congress catalog card no. 93-21353.
Document Type Technical Report
Title Note Information circular/1994.
NTIS Issue Number 199411
Longwall and Room-and-Pillar Productivity: A Review of U.S. Coal Mines.
Longwall and Room-and-Pillar Productivity: A Review of U.S. Coal Mines.
PB94150604

  • Coal mining
  • Productivity
  • Room and pillar mining
  • Caving mining
  • United States
  • Coal seams
  • Bureau of Mines
  • 48A - Mineral Industries
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