Geodynamic Phenomena Associated with Copper Ore Mining Below the Rheological Roof Stratum
Investigations concerned with numerical modeling of geodynamic processes within Polish copper mines districts affected with a thick salt rock stratum presence are presented. The adequate parameters of the developed numerical model of rock mass behavior were determined using laboratory tests and back calculation procedure based on FEA. Particular attention was paid to estimating the salt-rock time-dependent behavior and its appropriate rheological parameters. Geological and geomechanical analyses permitted formulating 3d FDM based model utilizing the thick composite plate analogue, which represents sufficiently well the real geological structure and actual mining conditions including backfilling processes. The elements of rock mass model were characterized using different constitutive laws, representing among them the elastic, elasticplastic, and elastic-viscous-plastic behavior. Technological pillars were allowed/supposed to fail and load floor and immediate roof strata with the load equal to their residual strength. The rocksalt presence above the exploited copper ore seam introduces significantly worse safety conditions as compared with salt less rock mass. This is because of the relatively low saltrock strength parameters (particularly tensile strength) as well as great thickness of salt deposit.
W.M.Pytel
KGHM Cuprum CBR & Wroclaw University of Technology, Wroclaw, Poland
国际会议
香港
英文
1-4
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）