Paleocollapse structure as a passageway for groundwater flow and contaminant transport |
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| Authors: | Wan Fang Zhou |
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| Institution: | (1) P.E. LaMoreaux and Associates Inc., 106 Administration Road, Oak Ridge, TN 37830, USA e-mail:pelaor@usit.net, LA |
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| Abstract: | Paleocollapse structure is a rock collapse, resulting from the failure in the geological history of the bedrock overlying
karstified limestone. Depending on the present hydrogeological conditions within the area of paleocollapse and the internal
properties of these structures, they can provide a means to facilitate groundwater flow and contaminant transport. Inactive
paleocollapse structures can be reactivated by human activities such as dam construction, mining underground minerals, pumping
groundwater, and development of landfills. They can also be reactivated by natural events such as earthquakes and neotectonic
movements. In the mines of northern China, sudden inflow of karst water from Ordovician limestone into drifts and mining stopes
through paleocollapse structures has caused significant economic loss. Water pumping tests and accompanied dye traces are
effective approaches of locating water-conducting paleocollapse structures. Grouting is probably the best means of preventing
them from becoming geohazards.
Received: 26 November 1996 · Accepted: 17 June 1997 |
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| Keywords: | Paleocollapse Karst Groundwater flow Contamination |
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