Theoretical Investigation of Rock and Support Interaction -Develop More Rational Design Methods and Develop New Types of Support and Mining Systems. Part 1.

摘要

The finite element method was applied to several practical problems in geotechnical engineering. An underground power station was investigated with a finite element computer code having features of elastic,elastic-plastic,and no-tension modeling of rock properties. This study showed that large wall displacements in the power plant were caused by movements of a large rock block in the rock mass. Another study was made of roof deflection due to increasing roof space in an underground mine. From this study it was possible to determine the in-situ modulus of the rock mass. This modulus can then be used to design openings in the in-situ material. A third study was conducted on stresses in a steel liner used in underground support. The results showed that increasing the number of blocking points reduced the bending moments in the support. Detailed descriptions of these studies and information on obtaining copies of technical reports and other materials generated under these contracts are given in the Appendices. (Author)