Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pillar Load Transfer Associated with Multiple-Seam Mining
As part of a program to improve mine planning and development, the Bureau of Mines is investigating the effects of pillar load transfer which impacts on mining operations within a multiple-seam configuration. At two mine sites, the Bureau performed a complete geological analysis and installed and monitored instrumentation to gather pertinent data on rock mechanics. Overburden depth varied dramatically in the vicinity of the study area and reached a maximum at the study site; innerburden thickness was less than a pillar width (40 to 45 ft); heaving was experienced in both mines where sandstone and/or shale floor units were observed; overlays of the mine layouts show pillars were not totally superpositioned; a maximum of 5 in of roof to floor convergence was measured; and pressure readings indicated pillar core loading only and increased to a maximum of 7,000 psig over instrument setting pressure.
Pillar Load Transfer Associated with Multiple-Seam Mining
As part of a program to improve mine planning and development, the Bureau of Mines is investigating the effects of pillar load transfer which impacts on mining operations within a multiple-seam configuration. At two mine sites, the Bureau performed a complete geological analysis and installed and monitored instrumentation to gather pertinent data on rock mechanics. Overburden depth varied dramatically in the vicinity of the study area and reached a maximum at the study site; innerburden thickness was less than a pillar width (40 to 45 ft); heaving was experienced in both mines where sandstone and/or shale floor units were observed; overlays of the mine layouts show pillars were not totally superpositioned; a maximum of 5 in of roof to floor convergence was measured; and pressure readings indicated pillar core loading only and increased to a maximum of 7,000 psig over instrument setting pressure.
Pillar Load Transfer Associated with Multiple-Seam Mining
R. J. Matetic (Autor:in) / G. J. Chekan (Autor:in) / J. A. Galek (Autor:in)
1987
30 pages
Report
Keine Angabe
Englisch
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