Abstract: Rigid and brittle rocks trend to rockburst，which is generalized by uniaxial compressive strength ? c, ratio of compressive strength and tensile strength ? c /? t and exponential of strike energy WB. Before physical model is made, some similar materials, such as quartz sand, gypsum, cement, water, glycerin and glutin, are blended by different proportions of ingredients according to the principle of orthogonal test design. In course of the proportioning, the small model samples are produced and uniaxial compressive test and split test are done with them. From the results of the tests, it is found that the different proportions of similar materials influence ? c , ? c /? t and WB differently. Based on physical simulation, ? c , ? c /? t and WB are checked in general and the directions for the material generalization are confirmed. The mechanical parameters of materials by the directions, which are steady, not only meet with requests for rockburst, but are convenient for making big model. Therefore, great physical simulation for rockburst is feasible.

Key words: physical simulation, rockburst tendency, similar material, proportioning test, orthogonal test design