Study of karst groundwater flow characteristics of a mine in Pingnan county, Guangxi through connection test

• Published in: Zhongguo yan rong Vol. 33; no. 1; pp. 31 - 36
• Main Authors: YU, Le, WANG, Li-heng, WANG, Ju-ping
• Format: Journal Article
• Language: English
• Published: 01.01.2014
• Subjects: China, People's Rep., Guangxi
• ISSN: 1001-4810

The mine in Pingnan county, Guangxi is located in a closed hydrogeological basin which borders the Qinchuari River in the east, the Xunjiang River in the south, the Wujiang River in the west and the watershed of groundwater in the north. The strata exposed in the mine area are mainly Devonian limestone and calcite dolomite, and Quaternary Holocene loose deposits. Declining groundwater levels due to artificial drainage lead to a redistribution of the groundwater flow field and the mining area became a cone of depression in the aquifer. The Qinchuan River is a potential risk to mining safety. In order to understand the flow path and percolation velocity of groundwater, and recharge sources of drainage water in the mine area, a connection test was conducted. Finally, in order to choose an appropriate time to drain groundwater, fluctuations in the level of Qinchuan River should be recorded and analyzed from a security perspective. On the other hand, some engineering measures should be considered to block groundwater flow, such as curtain grouting anti-seepage.