Blasting load has the characteristics of high pressure and transient. Underground structure belongs to semi infinite domain in traditional simulation. And the computation is inefficient because of the numerous elements. The Wavelets Finite element has characteristics of good digital approximation. And one element hasmanynodes. The three-dimension transition matrix was derived. The new elements of three-dimension interval B-spline annulus sector wavelet elementand sector wavelet element were constructed. And it was used to study the adjoining rock stability of underground arch structure under blasting Load through programming with Matlab software. The numerical result is basically consistent with the data collected at blasting excavation scene. And thecomputation efficiency is improved compared with traditional finite element.
Key words
blastaction /
undergroundaxial structure /
adjoining rock stability /
interval B-spline Wavelet /
element construction
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