Resource Exploitation and Protection of Leye Tiankeng Characteristic Tourism;

Characteristics and Evaluation of Karst Landscape in Tiankeng-Difeng Scenery Site, Fengjie, Chongqing;

Research on Formational and Evolutional Processes of Xingwen's Erosive Karst Tiankeng

Tiankengs are formed most commonly by the collapse of bedrock into underlying caves that contain active rivers.

Research on Tourism Integrated Development ofKarst Tiankeng under the Viewpoint of Organizational Ecology——A Case Study of Dashiwei Tiankeng Group of Leye;

After the finish of open pit mining in Cangshang mining area of Sanshandao gold mine,little segment caving mining method without sill pillar is carried out to make use of the low-grade medium-thick cracking gold orebody in the open pit bottom.