ishaq afolabi | Federal University Of Technology Akure,Nigeria (original) (raw)

Papers by ishaq afolabi

International Journal of Rock Mechanics and Mining …, Jan 1, 2003

Mathematical Geosciences, Jan 1, 2010

Economic Geology, Jan 1, 2006

Abstract An ideal mineral exploration program characterizes all types of data by describing its r... more Abstract An ideal mineral exploration program characterizes all types of data by describing its relationship to an integrated mineral deposit and exploration model. The model is used to interpret the mineralization and plays a role in the decision making for exploration ...

… of the Sixth International Conference on …

... The methods like genetic algorithm [12], simulated annealing [14], hybrid tabu-ascent algorit... more ... The methods like genetic algorithm [12], simulated annealing [14], hybrid tabu-ascent algorithm [13], and so on. ... in Pakistan will be proposed to show the whole process of the modeling and the ... at mines as well as due to movements of trucks for transportation exploitation of coal ...

45th US Rock Mechanics/Geomechanics …, Jan 1, 2011

... These different methods will be tested to develop the PFC3D model which can correctly simulat... more ... These different methods will be tested to develop the PFC3D model which can correctly simulate the behavior of real rocks including the UCS/T ratio. ... 1999. Discrete fracture network modeling applied to groundwater resource exploitation in southwest Ireland. ...

International Journal of Rock Mechanics and Mining …, Jan 1, 2002

Proc., 1st Geological Belgica …, Jan 1, 2002

... Page 270. Materials and methods Bottom ash description The dominant mineral phases detected b... more ... Page 270. Materials and methods Bottom ash description The dominant mineral phases detected by XRD are quartz, feldspar and calcite. ... Long-term prospects and benefits The exploitation of waste residues for industrial use constitutes an increasingly important development. ...

… UNIVERSITY OF ILORIN KWARA STATE NIGERIA

There has been considerable interest in modeling realistic subsurface light scattering in materia... more There has been considerable interest in modeling realistic subsurface light scattering in materials such as marble, human skin, or clouds. Many of these models provide a solution for the transport equation in a homogeneous or layered scattering media. The model we present here exploits a diffusion mechanism to provide a simpler solution to the transport equation. Treating light flux as

The Australian journal of anthropology, Jan 1, 1996

... the Quechua-speaking Bolivian tin miners are locked into both a relationship of exploitation ... more ... the Quechua-speaking Bolivian tin miners are locked into both a relationship of exploitation and dependency ... THE LIFE OF MARBLE: THE EXPERIENCE AND MEANING . ... in the most heavily mechanised quarries men will often utilise hand tools and artisanal techniques to deal ...

Engineering Geology, Jan 1, 2005

The paper commences with a description of the mining resource studied (roofing slate), the partic... more The paper commences with a description of the mining resource studied (roofing slate), the particular features of slate deposits and slate mining techniques. We then describe the methodology used for drilling core studies, the most reliable method for ornamental rock mining exploration.From the drill-core data, applying statistical techniques (kriging) with the assistance of the powerful DATAMINE 5 software package ([MICL, 1999. “Datamine 5”. Datamine Group. Mineral Industries Computing Limited.]) can make an assessment of the exploitable resources in a quarry. To do this, the research domain is first delimited – in terms of the top and bottom of the exploitable seam, as well as the sidewall boundaries – employing ordinary kriging. A wireframe model of the deposit (the domain) is constructed and is sub-divided into blocks (block model). The resources in the deposit are then evaluated using indicator kriging and taking into account the anisotropic directions of the slate deposit. This produces data in the form of locations, tonnages and percentages of exploitable slate.The final step compares results obtained from the model with results obtained from mining in order to arrive at conclusions respecting the methodology.

SPE/DGS Saudi Arabia Section Technical Symposium …, Jan 1, 2011

Abstract Calcium carbonate, used as a “sizing” material to aid in fluid loss control during drill... more Abstract Calcium carbonate, used as a “sizing” material to aid in fluid loss control during drilling/completion operations, is supplied to Aramco in a number of different pre-ground diameters (eg, Chips, coarse, medium and fine), by a number of vendor/suppliers. In order ...

Geological Survey of Canada, Jan 1, 2005

Computers & Industrial Engineering, Jan 1, 2004

The concept of a complex large system of mineral resource exploitation was advanced from the syst... more The concept of a complex large system of mineral resource exploitation was advanced from the system theory viewpoint. On the basis of the integrated techniques of qualitative and quantitative analysis, the multiple objective intelligence-integrated methodology for decision-making on mineral resource exploitation was investigated and its integrated model was also formulated. The mineral deposit model, expert system model for mining method selection and the artificial neural network model for prediction economic index, as well as the programming model, acted as the core of this system, while the multiple goal programming model served as the top of the model. An intelligent system to assist the programming of decision-making on mineral resource exploitation for operating mines was developed by means of the systematic combination of optimization technology with an artificial neural network, an expert system, computer-aided design and operations research (OR). The structure of an integrated intelligent system for decision-making on mineral resource exploitation was described. In addition, forecast and simulation, as well as optimization, were integrated. The system's preliminary application was illustrated with an example.

International Journal of Rock Mechanics and …, Jan 1, 2012

We mapped the heterogeneity of strain produced during creep experiments done at strain rates of 1... more We mapped the heterogeneity of strain produced during creep experiments done at strain rates of 1e-5 to 1e-4 (inverse seconds) and at 700-1000 K, on split cylinders of Carrara marble. The micro-scale mapping technique used pre- and post-deformation observations of a fine grid of markers deposited on one surface of the split cylinders. The local strain, which could be measured at a scale of one micron or less, could be as large as three times that of the total bulk aggregate strain, which was typically between 0.10 and 0.20. Localized deformation could be observed along twins and grain boundaries, but could also be observed as patchy strain variation in intergranular regions, probably indicating the development of a subgrain structure. A Schmid factor analysis suggests that multiple slip systems were activated during the compression tests, as expected for these conditions. The von Mises equivalent strain, averaged over the entire grid area, is the same as the imposed strain, but the strain averaged over a single grain can vary by a factor of two times the bulk strain. Simple VPSC models are not capable of explaining the grain to grain variations, or the localized intergranular heterogeneity.

Journal of Geophysical Research, Jan 1, 2010