The fracture development law in the outcrops is similar to that in underground rock.

It was analyzed and researched that the cracking process and the cracks development law of the composite wall through the test.

The general karst development law in the central Hunan is introduced.

0 using GIS technology for comporting karst development law intuitively.

In order to study the overburden strata failure law and water conducted fracture zone development law under the condition of the fully mechanized top coal caving mining in Lu \'an Mining Area,three high level survey boreholes in the roof caving zone and the water conducted fracture zone were made in the 6206 fully mechanized top coal caving mining face in Wangzhuang Mine.

This paper analyzes on the developing regularity of the small and medium-sized faults in the coal seam of Huozhou mine area and the factors influencing their development,and simulates the developing regularity of the small and medium-sized faults by using the numerical simulation.

This paper researches and analyses on the developing situation of underground faults of Wangcun Mine and its formation principle, sums up the features of fractural structure of Wangcun Mine and its developing regularity, which can be used to guide the production and safety.

The major types and developing regularity of rock and soil engineering disasters are summarized,at the same time some prediction methods and prevention measures are proposed.