标题：Relative Impermeability of the Ordovician Top and Risk Assessment of Water Inrush from Coal Floor in Baode Coalfield
作者：Zhang, Weijie; Li, Shucai; Wei, Jiuchuan; Zhang, Qingsong; Liu, Rentai; Li, Zhipeng; Sun, Zizheng
作者机构：[Zhang, Weijie; Li, Shucai; Zhang, Qingsong; Liu, Rentai; Li, Zhipeng; Sun, Zizheng] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Shand 更多
会议名称：International Conference on Structures and Building Materials (ICSBM 2013)
会议日期：MAR 09-10, 2013
来源：CONSTRUCTION AND URBAN PLANNING, PTS 1-4
关键词：Ordovician Top; Relative Impermeability; Water Inrush; Risk Assessment
摘要：In order to study the safety mining of the deep buried coal seams being threatened by high pressure karst water, relative impermeability of the Ordovician top is demonstrated through studying lithology, filling degree of the karst fissures as well as wash water quantity, in the Baode mine field. Furthermore, the main influencing factors on impermeability of coal seam floor are analyzed, and divisional risk assessment of floor water-inrush from the Ordovician karst aquifer is performed. Overall, by considering the relative impermeable strata in the Ordovician top, the accuracy of risk assessment on coal floor water-inrush can be improved.