The particle crushing probability in the model is derived on the basis of the Weibull distribution formula in the frame of statistical fracture mechanics with the use of the nominal stress concept.

The crushing probability increases with the applied load.

The theoretical basis of more crushing and less grinding has been clarified from power consumption theory,crushing probability and granularity.

This paper analyzes the rock breaking mechanism of cone bits during drilling and the equiprobable breaking cuttings by using the fractal geometry theory.

After a brief introduction of the early ideas put forward by Weibull to use this form of distribution in formulation of a statistical theory of material strength,this paper reviews the application of this theory in description of particle-breakage and mathematical modelling of comminution in terms of breakage probability and fragment size distribution.

Experimental study on fine sediment concentration under breaking waves;

This paper presents the experimental study on the multi-directional focusing waves and breaking waves,which are generated in wave basin by using focusing wave method with two different spectrums(constant wave amplitude spectrum and constant wave steepness spectrum) and two different water depths.