By Ove Stephansson, John Hudson, Lanru Jing
One of the most vital and interesting present steps ahead in geo-engineering is the advance of coupled numerical versions. They symbolize the fundamental physics of geo-engineering tactics which could comprise the results of warmth, water, mechanics and chemistry. Such versions offer an integrating concentration for the wide variety of geo-engineering disciplines. The articles inside of this quantity have been initially provided on the inaugural GeoProc convention held in Stockholm and comprise a suite of surprisingly top of the range info now not to be had in other places in an edited and coherent shape. This assortment not just merits from the most recent theoretical advancements but additionally applies them to a couple of functional and extensive ranging purposes. Examples comprise the environmental concerns round radioactive waste disposal deep in rock, and the quest for brand spanking new reserves of oil and gasoline.
Read Online or Download Coupled Thermo-Hydro-Mechanical-Chemical Processes in Geo-systems, Volume 2 (Geo-Engineering Book Series) PDF
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Extra info for Coupled Thermo-Hydro-Mechanical-Chemical Processes in Geo-systems, Volume 2 (Geo-Engineering Book Series)
The models must be supported by experiments that can credibly be extrapolated. The models used are based on the laws of mass and energy conservation and on laws of thermodynamics. The difficulties in applying these laws arise mainly from the fact that the rock mass cannot be described in detail. The location, orientation and detailed hydraulic properties of the fractures cannot be measured in detail. The diffusion and sorption properties of the interior of the rock mass under natural stress cannot be readily measured.
INTERPRETING FIELD EXPERIMENTS There have been a number of field experiments over distances ranging from few meters to 30-50 m in fractured crystalline 27 rocks with the aim of testing the existing models for flow and transport, some of which are discussed in this paper (Abelin et al. 1991,Winberg et al. 2000, Andersson et al. 2002). Results from tracer experiments in the field are sometimes used to validate the concept underlying the models and to verify that independent data can be used to predict the outcome of the experiments.
However, if we follow each increasingly smaller fraction through the system each fraction will experience the same residence time as the other water traversing a fracture. Therefore the residence time of each fraction will be the sum of the residence times in all the paths it has visited. In the same way the (little) stream q contacts its fraction of L,H^, in the fracture with total flowrate Q/- The LW/q for the whole path is the sum of LiW/Qi of all the channels that have been visited. Figure 5 illustrates different paths that are taken by different parts of the original stream emanating from one point in a fracture network.