Development characteristics and influence degree zoning of carbonate rock collapse in Nanzhang and Baokang Counties

In recent years, the carbonate rock distribution areas in Nanzhang and Baokang Counties, Hubei Province have collapsed frequently, causing serious casualties and economic losses. Based on the data of 32 carbonate rock collapse obtained from the detailed investigations of 1:50, 000 geological disasters in two counties, this paper summarizes the development characteristics of the collapses from the perspectives of time and space distribution, scale characteristics, development stratigraphy and failure mode. According to the statistical result, the paper summarizes the collapses into five types. Then, using partitioning software and guided by the theory of the impact degree partition, the paper divides the carbonate rock distribution areas into directly affected areas and non-directly affected areas according to the scope of impact and the degree of damage. Subsequently, corresponding collapse prevention measures are proposed for different affected areas. Finally, the Tangchi gorge collapse in Baokang County is selected as a typical example for the analysis of the development characteristics of collapse, a more targeted prevention measures are proposed. The research result in this paper can systematically reveal the development characteristics of the same type of collapse or potential collapse points, and then guide their early identification and prevention. Thus, this has practical significance for raising awareness of disaster reduction and prevention.