The formulae are deduced for calculation of the radii of the smashed and cracked areas in rock by a long charge explosion, with the Mises' strength criterion.

Study on Elastic Modulus for Fractured Rockmass Based on Strain Coupled Hydraulic Model;

Experimental study on unsaturated seepage flow in simplified fracture model;

A numerical simulation method to determine unsaturated hydraulic parameters of fracture;

Study on cranny characteristics of the ruins of Jiaohe;

The method makes use of high frequency pulse electromagnetic wave to survey the distribution of cranny and rock solution is identified in the rocky historical relic, to provide available geologic information for the design of the rocky historical relic protection.

Effect of the cracks numbers on the coal strength;

Image comparison on structures between cracks and other types of pores;

By employing fractal theory,the evolution of the cracks in the overburden strata,which were obtained from distinct element numerical calculation,caused by high steep coal seam mining was analyzed.

Prediction research on the coal bed crack filling character;

Numerical simulation of water inrush law in coal seam floor with cracks and its application to engineering practice;

Numerical analysis of influencing factors in stability of cracked surrounding rock of a laneway;