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| CENTRIFUGAL MODEL TESTING STUDY OF EXPLOSION-
INDUCED CRATERS AND PROPAGATION OF GROUND
SHOCK IN CLAY |
| MA Liqiu1，2，ZHANG Jianmin1，2 |
(1. Institute of Geotechnical Engineering，Tsinghua University，Beijing 100084，China；
2. State Key Laboratory of Hydroscience and Hydraulic Engineering，Tsinghua University，Beijing 100084，China) |
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Abstract Previous research results indicate that chemical blasting is a phenomenon induced by volumetric effect. 1/N3(N for centrifuge acceleration) for blasting centrifuge model energy scaling can be confirmed according to the phenomenon. Centrifugal model tests on explosion-induced craters and propagation laws of ground shock in clay are investigated by using Tsinghua University?s 50 g•t geotechnical centrifuge. Measured acceleration waveform are presented，and the recorded results are also analyzed. Some certain understandings about explosion-induced craters and ground shock propagation in clay are obtained. Coriolis acceleration has no obvious effect on the forming process of the crater；on the contrary，Coriolis acceleration has effect on the ejection of crater and its distribution. The volume of crater has distinct relationship with gravity acceleration，small-scale modeling must increase gravity acceleration. The results prove that the geotechnical centrifuge is a good apparatus for blasting.
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Received: 17 July 2009
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2011, Vol. 30 
