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铜陵市朝山地区岩溶塌陷形成条件与地面稳定性评价分析
投稿时间:2018-12-18  修订日期:2019-09-16  点此下载全文
引用本文:查甫生,刘从民,苏晶文,吴长贵,崔可锐.2020.铜陵市朝山地区岩溶塌陷形成条件与地面稳定性评价分析[J].地质论评,(1):246-254,[DOI]:.
ZHA Fusheng,LIU Congmin,SU Jingwen,WU Changgui,CUI Kerui.2020.Formation conditions of karst collapse and evaluation of ground stability in Chaoshan area of Tongling City[J].Geological Review,(1):246-254.
DOI:10.16509/j.georeview.2020.01.018
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作者单位E-mail
查甫生 合肥工业大学资源与环境工程学院合肥 230009 Email:zhafusheng@163.com 
刘从民 合肥工业大学资源与环境工程学院合肥 230009  
苏晶文 中国地质调查局南京地质调查中心南京210016  
吴长贵 安徽省地质矿产勘查局321地质队安微铜陵244033  
崔可锐 合肥工业大学资源与环境工程学院合肥 230009  
基金项目:注: 本文为中国地质调查局项目“皖江经济带安庆—马鞍山沿江段1∶5万环境地质调查”(编号:DD20160247)、安徽省国土资源科技项目“安徽省沿江地区岩溶塌陷监测预警技术研究”(编号:2013 K 05)的成果
中文摘要:铜陵市朝山地区岩溶塌陷灾害是安徽省大型地质灾害隐患点。从该区基岩岩性、覆盖层特征、水文地质条件和人为影响等方面入手,利用钻探和地下水长期观测等技术手段,通过岩溶塌陷的影响因素分析,查明了研究区岩溶塌陷形成条件,评价了地面稳定性。得到主要结论如下:区内岩溶塌陷的分布受断裂控制,90%以上的塌坑位于距断裂20 m区域内;区内岩溶塌陷的发生与基岩岩性密切相关,CaO含量高有利于塌陷的发生;区内塌陷多发生于多元或二元结构地层区域;矿山排水是区内岩溶塌陷的主要诱发因素。最后在查明区内岩溶塌陷形成条件的基础上,采用经验指标法对朝山地区地面稳定性进行评价分析,确定研究区为易塌陷区,须重点监测与防治。
中文关键词:岩溶塌陷  断裂  形成条件  地面稳定性
 
Formation conditions of karst collapse and evaluation of ground stability in Chaoshan area of Tongling City
NameInstitution
ZHA FushengSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009
LIU CongminSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009
SU JingwenNanjing Center,China Geological Survey, Nanjing, 210016
WU ChangguiThe No. 321 Geological Team, Bureau of Geological and Mineral Explorationof Anhui Province, Tongling, Anhui, 244033
CUI KeruiSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009
Abstract:Objectives: The karst collapse area of Chaoshan Village is located in the central part of Tongling City, Anhui Province. The area affected by the collapse is about 0.24 km2, which is a large scale karst collapse disaster. Based on the study of bedrock lithology, characteristics of overburden, dynamic conditions of groundwater and human influence in chaoshan area of tongling city, the formation conditions of karst collapse in this area are analyzed. And the empirical index method is used to evaluate the stability of the ground, in order to provide a basis for the collapse management in the area.Methods: In the study area, borehole observation and in well charging method test are carried out, and statistical analysis is made based on previous engineering survey data.Results: Fractures dominate the distribution of karst collapse in the area,and upwards of 90% of the pits are situated in the 20m region of fractures. Lithology of the basement bears close association with occurrence of karst collapse, and collapse is triggered by advantage of the high levels of calcium carbonate. collapse mostly takes place in the zone of multiple or dualistic structure, and the collapse points are all distributed in the section with the thickness of overburden less than 12m.There is a significant correlation between subsidence and drainage in the study area, and the number of subsidence and displacement increase in the same direction.Conclusions: The formation conditions of large scale karst collapse in chaoshan village area of tongling city mainly include the following: ① Calcium oxide content in bedrock is relatively high; ② The covering layer is of multiple structures with thin thickness; ③ Abundant karst groundwater resources and good runoff discharge conditions; ④ Affected by drainage of three surrounding mines.In addition,Based on the investigation of the formation conditions of karst collapse in the area, the empirical index method is used to evaluate the ground stability of the Chaoshan area, and determines that the research area is a collapseable area, which requires key monitoring and prevention.
keywords:karst collapse  fracture  formation conditions  ground stability
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