March 2011
Evaluation of hydrojacking and hydrofracturing behavior in Aghajari formation (Gotvand dam site foundation), Iran
Regarding the construction of large dams, definition of hydraulically and hydro mechanical conditions of rock mass is necessary. This paper summarizes the results and evaluation of hydraulic jacking and hydraulic fracturing tests conducted in Aghajari formation in different depths. Lugeon testing was carried out in selected boreholes in order to study the groundwater characteristics of the Aghajari formation....
March 2011
Geoelectric investigation of the groundwater potential of Moniya Area, Ibadan
Geoelectric measurements using the Vertical Electrical Sounding (VES) method were carried out in Moniya, Akinyele Local Government, Oyo State, Nigeria, using the ABEM terrameter SAS 300B . The objectives of the study were to investigate the aquifer characteristics and groundwater potential of the subsurface formations. Seventeen profiles were carried out using the Schlumberger array configuration. The data...
March 2011
Petrographic analysis for naming and classifying an igneous intrusive rock in the Lower Benue Trough
Absence of specific name and classification of the Isiagu intrusive rock and definition of its petrographic province became a challenge. To this effect, we collected rock samples at various depths from a deep quarry pit at Ishiagu and subjected the samples to both physical and optical analysis. This analysis was further tied to the basic principles of magma fractionation and crystallization. Physical analysis...
March 2011
Investigation into the weathering layer using up-hole method of seismic refraction
This paper is aimed at using up-hole method of seismic refraction survey to investigate the thickness of the weathering layer as well as the velocity of seismic waves through the layer. The first events to arrive at the geophones on a refraction profile had travelled by refraction along the top of the high speed zone just below the weathering layer. Using the time- offset curves of the first arrivals for...
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