关键词: 岩溶塌陷, 岩溶发育, 地质构造, 影响因素

Abstract: To analyze the characteristics and influencing factors of karst collapse in Xinqiao Mine， by collecting data on the mine's basic geology，water conservancy，engineering and environmental geolo‐ gy，water prevention and control，historical karst collapse，karst collapse geological disaster investigation and groundwater monitoring of the mine，The background conditions of the mine geological environment were mastered，the characteristics of karst collapse were summarized，and the influencing factors of karst collapse were analyzed. Through mathematical and statistical analysis，it has been clearly identified that the underlying karst developed bedrock strata，the overlying loose soil layers and groundwater activities are the main influencing factors of karst collapse. Research shows that the limestone strata with karst develop‐ ment in the lower Qixia Formation and the upper section of the Gufeng Formation are the basic conditions for the occurrence of karst collapse. Weak geological structures such as fault zones and contact zones con‐ trol the distribution and degree of karst collapse. The overlying loose strata affect the process and scale of karst collapse and provide the source of collapse materials. Mine drainage is the main dynamic factor that induces karst collapse. Karst collapses in mining areas are mostly circular or oval in shape，with diameters and depths mostly less than 5 m. Over 90% of them are induced by mine drainage and dewatering，and they intensify with the increase of groundwater activity. The collapses are characterized by concentrated dis‐tribution along the complex sections of limestone karst development areas and fault and contact zone struc‐ tures. The research results have clarified the influencing factors of karst collapse in the mining area，pro‐ viding a scientific basis for the prevention and control of karst collapse in the mining area. It is suggested that the engineering construction avoid the weak structural zone and optimize the mine drainage manage‐ ment to reduce the risk of collapse.

Key words: karst collapse, karst development, geological structure, influencing factors