June 2012
High safety pillars design for underground excavation of natural stone blocks
In existing underground mines of dimensional (natural) stone in Slovenia, including the Lipica II and Hotavlje I quarry, the geomechanical characteristics have been observed concerning safety pillars with a low width-to-height ratio. The initial height of safety pillars usually amounts to 4.5 m, but with deepening of underground spaces it increases by 3.0 m; in places, it may reach values of up to 25.0 m or even higher....
June 2012
Static and dynamic response analysis of reinforced concrete piles
In order to clarify restoring force and deformation characteristics of reinforced concrete (RC) pile – soil system, static and dynamic loading tests were conducted for RC piles in dry sandy soil. It was clarified that, within the range of the tests, the restoring force at pile head can be determined from the maximum damaged depth of the pile which depends on the relative stiffness between the...
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