In order to solve the difficult issue reproducing the roadway rockburst,a simple roadway rockburst simulation test system was developed.The low-intensity coal-like material was developed using model gypsum powder,GRG gypsum powder,hydrolyzed resin,and water as the main raw materials.Verification experiment indicates that the developed system has advantages of easy test operation and flexible application of static and dynamic load,and the model material can meet the demand.With the help of multi-source information monitoring system,the developed system realized the full-process simulation and monitoring of roadway rockburst under dy-namic disturbance.The strength of low-intensity coal like material can be controlled within the range of 6-9 MPa,the sample preparation and testing cycle was shortened to 21 days.The strain and acoustic emission signals during the static loading process of surrounding rock of roadway coincide with each other,which can reflect the devel-opment stages of compaction,elastic deformation,and micro-crack of the model specimens.The influence of dy-namic disturbance on the deformation and failure of roadway surrounding rock is directional.The deformation response of the roof is the most significant,generating significant strain oscillations and plastic bending defor-mations radially,but the rockburst mainly occurs on both sides of the roadway.Both dynamic disturbance suc-cessfully induced rockburst phenomena in the same area of the roadway,and the rockburst caused by the second dynamic disturbance tends to be stronger,which reveal the influence of dynamic disturbances on roadway rock-burst.The results indicate that the test system and simulation material are stable and reliable,which can effective-ly simulate the rockburst instability process of the roadway under dynamic disturbance,and provide certain guid-ance for studying the inducing mechanism of dynamic-static loading rockburst in roadways and the support and control mechanism against dynamic loading disturbance in roadways.
roadwayrockburstdynamic disturbancetest systemphysical simulation test
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