Relationship between hydraulic conductivity of karst collapse column and its surrounding lithology

被引：9
|
作者：
Gui, Hui [1 ]
Xu, Jinpeng [1 ,2 ]
Zhang, Di [1 ]
机构：
[1] China Univ Min & Technol, Sch Resources & Earth Sci, Xuzhou 221116, Jiangsu, Peoples R China
[2] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China
来源：
ENVIRONMENTAL EARTH SCIENCES | 2017年 / 76卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Karst collapse column; Hydraulic conductivity; Lithology; Mudstone content ratios;
D O I：
10.1007/s12665-017-6541-9
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Groundwater inrush from karst collapse column (KCC) is a serious water hazard in North China. The factors determining the hydraulic conductivity of KCC remain unclear. This study analyzes the hydraulic conductivity of two KCCs from the same coal mine region and one KCC from different strata and statistically compares lithologyrelated data for KCCs from 11 coal mines in North China. Finally, we calculated the probability of the hydraulic conductivity of KCC and compared these calculations with field data. The results indicate that the hydraulic conductivity of KCC is mostly affected by surrounding lithology formation and closely correlated with mudstone content. When the thickness ratio of mudstone in the surrounding strata is less than 0.5, the hydraulic conductivity of KCC is more likely to be permeable. This observation of the mudstone thickness ratio provided here can be used as a criterion to qualitatively assess the hydraulic conductivity of KCCs.
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页数：13
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