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Mining Publication: Overview of Current US Longwall Gateroad Support Practices: An Update
Keywords: Headgates Longwall mining Support design and selection Tailgates
Original creation date: December 2019
Authors: M Sears, G Esterhuizen, I Tulu
Peer Reviewed Journal Article - December 2019
Go to Web Page
NIOSHTIC2 Number: 20056107
Min Metall Explor 2019 Dec; 36(6):1137-1144
In 2015, 40 longwall mines provided nearly 60% of the US coal production from underground mining methods. This represents a substantial yet gradual increase from just under 50% over the last 5 years. As a result of this increased production share, the percentage of ground-fall-related fatalities in longwall mines has also increased when compared to all US underground coal mines. Additionally, about 80% of ground-fall-related fatalities have occurred in areas where the roof was supported. In an attempt to better understand the status quo of current US longwall support practices, a sample of 25 longwall mines were visited representing nearly 50% of the currently active longwall mines representing all of the major US longwall-producing regions. The resulting data was obtained from a wide variety of overburden depths, geologic conditions, mining heights, ground conditions, support practices, and gateroad configurations. The data collected is reported using both qualitative and quantitative methods. Results from the research update previous efforts in classifying mining accidents and injuries as well as current support practices presented by this author at the 2017 Society for Mining, Metallurgy, & Exploration Annual Meeting. This data provides a necessary background for future research aimed at further reduction of ground fall accidents and injuries.
First page of Overview of Current US Longwall Gateroad Support Practices: An UpdatePeer Reviewed Journal Article - December 2019
Go to Web Page
NIOSHTIC2 Number: 20056107
Min Metall Explor 2019 Dec; 36(6):1137-1144
See Also
Analysis and Design Considerations for Superimposed Longwall Gate Roads
Case History of the Response of a Longwall Entry Subjected to Concentrated Horizontal Stress
Development of Ground Response Curves for Longwall Tailgate Support Design
Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
A First Step in Developing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Pumpable Roof Supports: Developing Design Criteria by Measurement of the Ground Reaction Curve
Standing Support Alternatives in Western Longwalls
Standing Support Alternatives in Western United States Longwalls
A Study of the Ground Control Effects of Mining Longwall Faces Into Open or Backfilled Entries
Page last reviewed: March 9, 2022
Page last updated: March 9, 2022
Content source: National Institute for Occupational Safety and Health, Mining Program
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