By Paul L. Younger, N. S. Robins
This publication is a set of keynote experiences and exact case-studies masking the significant parts of lively study and state of the art commercial perform within the box of mine water administration. It addresses either problems with water volume (such because the influence of longwall mining at the piezometry and hydraulic houses of overlying aquifers) and water caliber (spanning an array of websites from deep coal mines to open-pit base steel mines), in addition to a wealth of hybrid, built-in stories during which hydrogeological and geochemical points are thought of (and controlled) jointly. The papers offered during this e-book are meant for practicing geologists and engineers considering the administration of energetic and deserted mine websites worldwide. it's also of curiosity to educational geoscientists and scholars with pursuits in low-temperature aqueous geochemistry and the hydrogeology of complicated, quasi-karstic groundwater circulate platforms. additionally on hand: two hundred Years of British Hydrogeology (Geological Society unique ebook) - ISBN 1862391556 strength, Waste and the surroundings: A Geochemical point of view (Geological Society designated book) - ISBN 186239167X The Geological Society of LondonFounded in 1807, the Geological Society of London is the oldest geological society on the earth, and one of many greatest publishers within the Earth sciences.The Society publishes a variety of fine quality peer-reviewed titles for teachers and pros operating within the geosciences, and enjoys an enviable foreign popularity for the standard of its work.The many components within which we put up in include:-Petroleum geology-Tectonics, structural geology and geodynamics-Stratigraphy, sedimentology and paleontology-Volcanology, magmatic reports and geochemistry-Remote sensing-History of geology-Regional geology publications
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Additional resources for Mine Water Hydrogeology and Geochemistry (Special Publication)
Example text
The figure shows, from the bottom up, the longwall mine, the caved and heavily fractured zones, the major confining layer and a fractured shallow aquifer overlain by a shallow confining layer. It corresponds to typical sites in Illinois, but the potentiometric response sequence would apply to most areas, with appropriate allowance for local controls such as topography. The mine is advancing towards the left in the figure. A point in the shallow subsurface experiences, more or less sequentially: extensional horizontal stresses (expressed as aligned tension cracks on the ground surface), shear deformation and opening of joints, rapid vertical subsidence and separation of bedding planes, horizontal compression which partially re-closes joints, and then continuing settlement of the strata which may partially re-close bedding-plane openings.
Map of the Saline County site, with inset showing instrumentation over Panel 5. From Booth & Bertsch (1999). Reproduced with the permission of Springer-Verlag (Hydrogeological Journal 7, 561–575) (expect for the US public-domain components) from the overlying shale into the upper bench of the aquifer; and the mobilization, by water flowing back through the sandstone during recovery, of sulphate originating from sulphides oxidized during the period in which the sandstone was unconfined. Saline County site At the Saline County site, six adjacent westwarddriven longwall panels of widths varying from 188 to 287m, and lengths from 2286 to 3130m, were mined successively north to south between 1989 and 1994 (Fig.
Schmidt (1992) studied inflow and outflow zones in wells in a valley above a room-and-pillar mine in Pennsylvania, and found that the wells maintained their water levels because the water flowing into them from the shallow system exceeded the water draining from them down to the mine. Thus, paradoxically, water levels may remain steady in lower aquifers that are draining directly to the mine, but decline in upper aquifers that are not. It is this sort of complex interaction between position relative to the mine and position relative to topography, stratification and the local groundwater flow system that makes the generalized prediction of mining impacts so difficult to apply to an individual well or site.