A study on the interrelationship between fractal feature of crack distribution and strength of rock;

This paper analyzes the influence of crack distribution groups,distance,tilting angle,position and development degree on caving roof-fall,and proposes the best match between working face arrangement and crack distribution,enabling to improve caving roof-fall.

On the basis of the experimental study of permeability coefficient for coal sample under triaxial stress state,this paper analyses the primary factors to affect coal seampermeability and approaches the fractal feature of the crack distribution in coal mass.