On the basis of the chain-styled theory of the disaster, the text discusses briefly chain-styled mechanism of the development, burst, continued character and staged character.

The paper reviews the current research work of disaster mechanism and control countermeasure for hydraulic concrete structure systems.

Study on debris flow forming mechanism of Taihang mountain in the west of Shijiazhuang city Hebei province;

Taking Taibaiyan cliff, locating in Wanzhou in the Three Gorges Reservoir region, as an example, authors approach formation process of cliff through bond mechanism of unstable rock in this paper, and point out that cliff is the inevitable results for unstable rock to develop.