Analysis of Rebound Rate of Wet Shotcrete Based on Experiment and Discrete Element Method

Wet shotcrete support is the main method for underground engineering construction at present. The rebound rate one of indicators to evaluate effect, and a lower will improve effect wet shotcrete. concrete aggregates available in different regions China have particle sizes. To achieve better supporting discrete element used simulate spraying process By constructing nozzle structure simplifying structure, paper establishes model Using above model, analyzes effects injection distance shrinkage angle on with three aggregate sizes 5∼11 mm, 11∼17 17∼25 mm. optimal parameters size ratios were obtained through simulation experiments. results are highly consistent field experimental structure. It feasible by method.