Study to the Characteristic on Jump Crushing the Rock

The paper analyses the designing theory of the rock-crushing machinery, and discovers that the study to the rock-crushing characteristic and its application. As a result, the rock sample is made and conducted the indentation test with the disk hob of full face rock tunnel boring machine as rock-crushing tool. The experimental result shows that the first jump crushing parameter behaves a good convergence property, although the second and third jump crushing parameter is diffusive, the predictive formula of disk hob deriving from jump rock crushing law is more precise than other predictive formula. In addition, it discusses the application of jump rock crushing characteristic in the design to the rock-crushing machines.【 Descriptors】 Rock Jump crushing Parameter Indentation test