화학공학소재연구정보센터
International Journal of Coal Geology, Vol.41, No.1, 51-71, 1999
Case study evaluation of geological influences impacting mining conditions at a West Virginia longwall mine
Longwall development in a West Virginia coal mine was terminated due to severe geologic conditions. The combination of transition-type roof (comprised of interbedded sandstone and shale), excessive in-situ stresses, and low overburden zones caused massive roof falls. Additionally, both reduced seam thickness, caused by sandstone channels, and relatively weak floor impeded seam development. These factors were mapped using both exploration data and information obtained during mine inspections. Historical mine data was also analyzed to determine if factors such as thickness of overburden and mining orientation had an influence on mining conditions.