(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,
Chinese Academy of Sciences,Wuhan,Hubei 430071)
Abstract:The mechanism of rockburst is intricate,which is controlled by factors such as lithology,stress and excavation conditions,and the physical simulation test for rockburst has some unique advantages. On the basis of summarizing previous studies on rockburst with physical simulation test,the shortcomings in the present study and the future direction of study were described in detail from the aspects of the test instruments,the similar materials,the loading conditions and the methods of excavation,supporting and monitoring. The following conclusions are obtained. Establishing the similarity criterion of brittleness suitable for rockburst and developing similar materials with low strength and high brittleness are basic testing requirements for the successful physical simulation of rockburst. Solving the problems of the similarity criterion and the manufacturing technology for rigid structural plane theoretically and experimentally respectively are keys for the structural rockburst research. With the required loading accuracy and stressing uniformity,designing the large-tonnage loading device and the TBM which considers the complex rock-machine interaction,and the drill and blast construction technology,are guarantees for the study of different factors influencing the rockburst. Devising diverse information monitoring systems that are matched with the typical deformation and failure characteristics of hard rock cracking is prerequisite to successfully interpret the behavior of rockburst.
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