中国岩溶Issue(5)：495-506,12.DOI:10.11932/karst201505y01
山东省泰莱盆地岩溶塌陷发育特征及形成机理
Development features and formation mechanisms of karst collapses in the Tailai basin,Shandong Province
摘要
Abstract
The Tailai basin is located in the east of Shandong Province.By the end of 2013,the history re-cords karst collapses up to 1 61 in number,which occurred at 97 locations.Based on previous studies,the up-dated survey and monitoring results,this work makes a research on karst styles,characters and formation mechanism of karst collapses of the Tailai basin.The results show that these karst collapses are concentrated in the groundwater drawdown funnels and affected areas.Their distribution is obviously controlled by geo-logical structures.The thickness of Quaternary System above the subsidence areas is generally less than 30 meters,with underlying bedrock of Ordovician limeston.More than 80% of the karst collapses occur in flood seasons.Three geological models of karst collapses are established on the basis of stratum structures and groundwater dynamic conditions at collapse sites:(1)karst collapse in single-layer structure without aquifer;(2)karst collapse in two-layer structure;(3)karst collapse in multiple-layer structure with aquifers.The process of the first karst collapse is “vacuum suction erosion-disintegrating peel-collapse”.The process of the second karst collapse is “seepage deformation-disintegration-collapse”or “vacuum suction erosion-seepage de-formation-collapse”.And the process of the last one is “vacuum suction erosion-seepage deformation-disinte-gration-collapse”.This paper provides scientific basis for risk prediction and geologic hazard control in karst collapse areas.关键词
泰莱盆地/岩溶塌陷/地质模式/机理Key words
Tailai basin/karst collapse/geological models/mechanism分类
天文与地球科学引用本文复制引用
王延岭,陈伟清,蒋小珍,管振德..山东省泰莱盆地岩溶塌陷发育特征及形成机理[J].中国岩溶,2015,(5):495-506,12.基金项目
山东省国土资源厅地质勘查项目(编号:鲁勘字[2011]109号) （编号:鲁勘字[2011]109号）
国土资源部公益性行业科研专项经费项目(201211083) （201211083）
国家青年自然科学基金资助项目(41302288) （41302288）
