OLALEYE Boluwaji Muriana (Publications)
Publisher Journal Of Emerging Trends In Engineering And Applied Science, UKs
Publication Type Journal
Publication Title Kinematic Analyses Of Different Types Of Rock Slope Failures In A Typical Limestone Quarry In Nigeria.
Publication Authors B.M.Olaleye and Z.F. Ajibade
Year Published 2011
Abstract

Kinematic analyses of planar discontinuity sets in a limestone deposit in Western Nigeria were carried out to ascertain the degree of slope stability. Discontinuity orientations in the rock mass were mapped using compass clinometers. Kinematic analyses of the discontinuities were carried out using DIPS software. The results of the investigation revealed evidence of potential slope failures from the two joint sets identified in the study area. From the result of the analyses, face 1 of the limestone quarry is susceptible to both plane and wedge failures as all the geometrical conditions associated with the occurrence of such failures were noticeable. However there was no indication of any toppling failure from the analyses. Face 2 of the limestone quarry is not susceptible to wedge failure, but some part of it (40%), faces the risk of plane failure while up to 50% of it faces the risk of toppling failure. It can be concluded that analyses of discontinuity orientation in relation to cut face direction in rock excavation is essential for mine planning to forestall mine accidents.


Publisher Scolarlink Research Institute Journals
Publication Type Journal
Publication Title Analyses Of Fractures Orientations Of Ekpeshi Dolomite Deposit, South-West, Nigeria
Publication Authors Ajibade Z.F and Olaleye, B.M.
Year Published 2012
Abstract

Fractures orientations analyses were carried out on two faces tagged face 1 and face 2 at dolomite deposit quarry in Ekpeshi, Nigeria. Two joint sets were identified. Kinematic analyses carried out with the aid of DIPS software show different types of failure. Face 1 of Ekpeshi quarry is susceptible to wedge failure while toppling failure is not a threat on this face. Face 2 of Ekpeshi dolomite is partly under the threat of plane failure. There is no possibility of wedge failure on this face. Also there is no threat of toppling failure on the dolomite face 2. It was observed from the analyses that little attention was paid to relationship between cut face and fracture orientation in the case study area. Although there was no tension crack which could have aggravated slope failures, however the toes of the slope were heavily flooded; this situation may reduce friction between fracture surfaces and aid sliding. It was concluded and recommended that fractures orientations analyses should always be carried out to determine the proper orientation of cut face in relation to fracture orientation. Also there should be proper drainage at the toes of the slope to prevent percolation which might reduce friction between discontinuities surfaces so as not to turn profitable mines to loss and to minimize if not prevented, failures that can be dangerous to both personnel and equipment.


Publisher The International Journal Of Engineering And Science (IJES)
Publication Type Journal
Publication Title Engineering Geological And Foundation Characteristics Of Granite Derived Subsoils At Ibuji Area, South Western Nigeria
Publication Authors Jegede O.G. and Olaleye B.M.
Year Published 2013
Abstract

Engineering geological and foundation characteristics of granite derived subsoils at Ibuji area was investigated. The rock out-crops of the area were mapped. The dominant rock in the area is granite and the area generally falls within the precambrian basement rock terrain of Nigeria. Structural features in the rocks include micro joints, veins and minor fractures. Laboratory test results of the disturbed soil samples collected showed a natural moisture content ranging from 30.06% to 35.02%, liquid limit from 40% to 55%, linear shrinkage from 8.5% to 9.4% and specific gravity from 2.60 to 2.65. The dominant subsoils are clay and sands with good foundation properties.


Publisher IOSR Journal Of Engineering (IOSRJEN)
Publication Type Journal
Publication Title Characterization Of Some Selected Limestone Deposits In Ogun State, Nigeria For Prediction Of Penetration Rate Of Drilling
Publication Authors Okewale I.A. and Olaleye B.M.
Year Published 2013
Abstract

The research correlated physical and mechanical properties with penetration rate of drilling in some typical limestone quarries in Ogun State, Nigeria. The work was carried out using the field data and rock samples collected from the two locations [Sagamu (A) and Ewekoro (B)]. Field data were used for the determination of penetration rate while rock samples were used for the laboratory analysis. The result of modal analysis from the thin section shows that sample A has the mineralogical composition of 79.5% calcite, 13.5% quartz and 7.0% opaque while sample B has 77.5% calcite, 17.0% quartz and 5.5% opaque. The average density, porosity and rebound hardness of samples from locations A and B as determined in the laboratory are 2.68g/cm3, 3.08%, 32.3 and 2.71g/cm3, 3.06%, 35.1 respectively. The result of Uniaxial Compressive Strength (UCS) as estimated from the correlation chart between average density and Schmidt hardness shows that location A has average strength of 61.8 MPa while B has 72.4 MPa. The point load strength index for location A has an average value of 1.6 MPa and B has an average value of 1.8 MPa while the tensile strength as estimated from point load strength index for A is 2.5 MPa and B is 2.7 MPa. The penetration rate as determined from field data shows that location A has an average penetration rate of 0.7 m/min and location B has an average penetration rate of 1 m/min. Statistical model was developed using Statistical Package for Social Sciences (SPSS) software and the result shows that there is a strong correlation between penetration rate and porosity, rebound hardness value and density. The result also shows that the porosity, rebound hardness value and UCS have negative influence on penetration rate while density has positive influence on penetration rate.   


Publisher The International Journal Of Engineering And Science (IJES)
Publication Type Journal
Publication Title Correlation Of Strength Properties Of Limestone Deposit In Ogun State, Nigeria With Penetration Rate Using Linear Regression Analysis For Engineering Applications
Publication Authors Okewale I.A. and Olaleye B.M.
Year Published 2013
Abstract

The research analyzed the correlation of strength properties of limestone deposit in Ogun state, Nigeria with penetration rate using linear regression analysis for engineering applications. The research was conducted using the field data and rock samples collected from the two locations, [Sagamu (1) and Ewekoro (2)]. Field data were used for the determination of penetration rate while rock samples were used for the laboratory analysis. The average density and rebound hardness of samples from locations 1 and 2 as determined in the laboratory in order to estimate uniaxial compressive strength are 2.68g/cm3, 32.3 and 2.71g/cm3, 35.1 respectively. The result of Uniaxial Compressive Strength (UCS) as estimated from the correlation chart between average density and Schmidt hardness shows that location 1 has average strength of 61.8 MPa while location 2 has 72.4 MPa. The point load strength index for location 1 has an average value of 1.6 MPa and location2 has an average value of 1.8 MPa while the tensile strength as estimated from point load strength index for location 1 is 2.5 MPa and location 2 is 2.7 MPa. The penetration rate as determined from field data shows that location 1 has an average penetration rate of 0.7 m/min and location 2 has an average penetration rate of 1 m/min. The correlation between the strength properties and penetration rate for location 1 shows that there is a very strong relationship between penetration rate and uniaxial compressive strength, point load strength and tensile strength while location 2 shows that there is a strong relationship between penetration rate and uniaxial compressive strength and a moderate relationship between penetration rate, point load strength and tensile strength.


Publisher Emerging Trends In Engineering And Technology
Publication Type Conference
Publication Title Correlation Of Bulk Density And Abrasion Resistance Of Some Igneous And Metamorpic Rocks.
Publication Authors Ademeso, O. A., Adekoya, A. J. and Olaleye, B. M.
Year Published 2012
Abstract

Six igneous and metamorphic rock types were investigated for their petrographic, bulk density and abrasion resistant characteristics. Petrographic microscope to which a digital camera was attached, balance with necessary equipment set up for Archimedes’ principle measurement and abrasion tester were used to determine the petrographic, bulk density and abrasion resistant characteristics respectively of the rock types after various sample preparations. Generally, quartz, biotite, plagioclase, microcline and hornblendeconstitute the major minerals in the thin sections of the rock types and the microstructures that were exhibited include cleavage, distorted cleavage, mineral inclusions, micro-cracks, bent twin lamellae, mymerkite and compressed twin plane. Biotite granite has the lowest bulk density of 2.63g/cc while the charnockitic rock has the highest of 2.81g/cc. The result of abrasion resistance shows that granite gneiss and porphyritic biotite granite have very low values of 26.50 and 26.65 respectively while lamprophyre and charnockitic rock have very high values of 34.40 and 33.40 respectively. A very high correlation coefficient of 0.9179 was recorded for the relationship between the bulk density (D)and abrasion resistance (Ha)of the rock types. A model relating the two properties, Ha = 46.79D – 97.43, was derived. Conclusively, bulk density has direct relationship with the abrasion resistance of igneous and metamorphic rocks and it is therefore used to estimate it.


Publisher IOSR Journal Of Engineering
Publication Type Journal
Publication Title The Inter-relationship Of Bulk Density And Porosity Of Some Crystalline Basement Complex Rocks: A Case Study Of Some Rock Types In Southwestern Nigeria.
Publication Authors Ademeso, O. A., Adekoya, A. J. and Olaleye, B. M.
Year Published 2012
Abstract

The inter-relationship of bulk density and porosity of some crystalline rocks in southwestern Nigeria was investigated. Six crystalline basement complex rock types from two localities in Nigeria (three each from Akure and Igarra) were sampled and tested for their petrography (mineralogy, texture and microstructures), bulk density and porosity. ImageJ was used for image analysis of the photo-micrographs, the bulk density was calculated from the determined specific gravity while the porosity was determined by water saturation technique. From the results of the analyses, the rocks were found to contain quartz, feldspar, hornblende, mica and minor minerals in various proportions. Micro-structures such as bent twin lamellae, undulose extinctions, distorted and incomplete twining and platy mineral alignment were observed in the thin sections of the rocks. The bulk density values ranged from 2.63 to 2.81 and the porosity from 0.03 to 0.16. The correlation coefficient relating the two parameters is -0.9713 indicating a very high negative correlation. The square of Pearson Product moment correlation coefficient is 0.9434. A mathematical model was derived from the relationship between the two parameters. The standard error of 0.02 and the Ftest of 0.98 were determined for the model. It was deduced that the porosity of a crystalline rock is affected mainly by its bulk density and possibly by the degree of weathering.  


Publisher Scholarlink Research Institute Journals
Publication Type Journal
Publication Title Establishing Relationships Between Some Engineering Properties Of Granitic Rock Types In Selected Quarries In South-West, Nigeria
Publication Authors Adeyemo, A. T. and Olaleye, B. M.
Year Published 2012
Abstract

Evaluation of some engineering properties of granitic rock types were carried out in selected quarries in Ekiti and Ondo states, Nigeria. The Rock Quality Designations (RQD); Uniaxial Compressive Strength (UCS); and Aggregate Crushing Value (ACV) of the rocks were determined both in the laboratory and on the field using international standard procedures. Subsequently, relationships were established between the determined rock strength parameters. From the results of the investigation, the granite rocks from the study areas were quantitatively evaluated and classified into different strength categories. The RQD of the rocks varies between 65.11% and 89.19% which reveal that the rocks range between fair and good in quality. The UCS varies from 65.65 MPa to 105.38 MPa which indicate that the rocks range from medium to high strength. The ACV varies from 21.99% to 28.31%. The result showed that the higher the RQD and UCS values, the lower the ACV. It was equally established that there are strong relationships between the values of RQD, UCS and ACV. The work will serve as additional database and help in optimizing the engineering design processes involving the use of the determined rock properties before and during excavation of the rock type.


Publisher The International Journal Of Engineering And Science (IJES)
Publication Type Journal
Publication Title Estimation Of Strength Properties Of Shale From Some Of Its Physical Properties Using Developed Mathematical Models
Publication Authors Anikoh G.A. and Olaleye B. M.
Year Published 2013
Abstract

Estimation of strength properties (uniaxial compressive and point load) from physical properties (density, porosity and rebound hardness) of shale rock type from Kogi State, Nigeria was investigated. The shale rock types were sampled and tested for their properties through in-situ and laboratory tests conducted. Schmidt hammer was used to carry out the in-situ testing of the rock on the field while rock samples were collected for laboratory test. Four samples of each rock type were prepared for the determination of density and porosity. The results obtained from the Schmidt hammer test and those of density determined from laboratory test were used to estimate the uniaxial compressive strength of the rock. The average density and porosity of the shale are 2.39 g/cm3 and 38.4%. The average uniaxial compressive strength and point load index values are 34.20 MPa and 1.60 MPa respectively. From the results, the strength parameters indicated high strength classification. The determined physical and strength parameters were analyzed statistically. Mathematical models were derived from the relationships between the parameters for the estimation of strength properties of the rock and the coefficient of their correlation (R2) indicated strong relationship. The results obtained would be useful tools for the prediction of the strength properties of rocks having similar physical properties as the investigated rock type.  


Publisher Journal Of Minerals Research
Publication Type Journal
Publication Title Using Petrographic Data To Predict Mechanical Properties Of Carbonate Rocks
Publication Authors B.M. Olaleye and K.A. Kareem
Year Published 2013
Abstract

The mechanical (uniaxial compressive and tensile strengths) and petrographic properties (allochem average size, fraction quartz, dolomiteand aragonite) of two carbonate rock types in South West Nigeria has been determined. With 115 test results from the limestone and dolomitic marble samples, MINITAB 15 statistical software was used to correlate the mechanical properties to the petrographic data. Preliminary results suggest that allochem average size and the proportion of quartz may be used to correlate the data for limestone samples while the fraction of dolomite and aragonite may be used for the dolomitic marbles.


Publisher IOSR Journal Of Engineering (IOSRJEN)
Publication Type Journal
Publication Title Investigating The Effects Of Some Geotechnical Properties On Exploitation Of Some Selected Laterite Deposits In South West, Nigeria
Publication Authors Olaoye, J.O., Olaleye, B.M. and Saliu, M.A.
Year Published 2014
Abstract

Investigation was carried out on the slope stability of lateritic soil due to effects of some geotechnical properties in selected burrow pits in Akure, Ibadan, Ewekoro and Iperu areas, south western, Nigeria. The geotechnical properties were determined in accordance with American Society for Testing and Materials (ASTM) Standards. The conventional slope stability analysis was based on the linear Mohr – Coulomb failure criterion utilizing the notion of safety factors with respect to shear strength, where their average results of cohesion, angle of friction, bulk density and moisture content from the locations are 82 kPa, 18 degree, 1700 kg/m3, and 22 % respectively. The average specific gravity for locations was 2.73. The degree of permeability was very low except for location 6 in Ibadan area which is medium. The grain size distribution for the locations was classified into SC – SM (silt clayey sand). From compaction test, average moisture content, average wet density and dry density for the locations are 23 %, 1849 kg/m3 and 1512 kg/m3 respectively while the average compaction curve deduced 24 % optimum moisture contents and 1639 kg/m3maximum dry density. The Atterberg limits test results indicate that locations 1 – 5 were recorded as plastic soil while location 6 non-plastic soil. Also, the linear shrinkage degree of expansion for location 1 – 5 indicates critical while location 6 indicates non-critical. Finally, statistical mathematical model equations were developed. The factor of safety for locations 1 – 5 was satisfactory for routine extraction and loading operations while location 6 was unsafe due to loading conditions of the terrain.


Publisher Journal Of Engineering Science And Technology
Publication Type Journal
Publication Title Modified Volumetric Joint Count To Check For Suitability Of Granite Outcrops For Dimension Stone Production
Publication Authors SALIU M. ALADE, OLALEYE B. MURIANA AND HALEEM J. OLAYINKA
Year Published 2012
Abstract This study compares the characterization of fractures of some granite outcrops in Southwestern Nigeria. Some geometrical properties of discontinuity (orientation, persistence, aperture, infilling and spacing) were evaluated. On the granite studied, most of the mapped joints have orientations that fall within 84○/020○ and 86○/300○. These patterns are compatible with the regional fracturing, which is predominantly shaped by NW-SE, NE-SW, NNE-SSW, ENE-WSW and WNW-ESE structure of tectonic origin. The XX type joint persistence is dominant while RR type is in minority. Closed aperture was observed at Ore, Awo and Ikole granite outcrops. The infilling materials are mica and quartz; their percentages are constant for all the outcrops studied. The modified volumetric joint count ranges from 0.67 m-1 to 1.24 m-1 and the average spacing of all sets varies from 1.62 m to 2.50 m. Fracture network characterization as carried out revealed that, for an outcrop to be economically suitable for dimension stone production, the modified volumetric joint count should not be above 1.7 m-1 and must be at least ‘good’ rock according to conventional rock mass classification. Numerical modeling of block size distributions of selected granites in Southwestern Nigeria was done using AutoCADTM 3D.


Publisher Bachudo Science Co. Ltd.
Publication Type Journal
Publication Title Determination Of Grindability And Work Index Of Itakpe Iron Ore
Publication Authors O. Ojo and B.M. Olaleye
Year Published 2000
Abstract

Laboratory studies were carried out to determine the grindability and work index of Itakpe Iron Ore, Okene, Nigeria. The Bond work index was measured in this study due to its reasonable application in the range of conventional ball mill and rod mill grinding as well as its wide acceptability in designing full scale mill in most mineral processing establishment. From the result of the analysis, the grindability and work index of Itakpe iron ore were found to be approximately 0.92 g/rev and 13.45 kwh/tonne respectively. The work index obtained for the Itakpe iron ore has a close correlation with 13.84 kwh/tonne for specular hematite.  


Publisher Nigerian Mining Journal
Publication Type Journal
Publication Title Analysis Of Drilling Mud Compatibility With Formation
Publication Authors B.M. Olaleye
Year Published 2007
Abstract

The compatibility of three types of drilling muds with formations being drilled was examined by measurement of some physical properties (sand content, viscosity, mud weight, pH) of the muds at varying temperature-depth conditions. From the resut of the analysis, it is shown that drilling mud properties are dependent of each other and to a considerable degree on the solid content ratio of the mud. Also, as depth of drilling increases, mud weight decreases while fluid viscosity increases for two types of drilling muds. It is evident that bentonite would be most suitable in shallow fresh water wells, salt gel for salt water wells and native clay would not be very good for drilling compared to other types of clay. 


Publisher Trans Tech Publications
Publication Type Journal
Publication Title Permeability Characteristic And Classification Of Coal Seams In Nigeria
Publication Authors B.M. Olaleye, O.O. Onyemaobi and J.M. Akande
Year Published 2009
Abstract

In this work, the permeability characteristics of Nigerian coal seams were determined and these properties were used to investigation the applicability of water infusion in the coal seams to solve coal-mining problems. The experimental work was conducted with Triaxial Compression Machine adapted for the permeability test comprising of Hoek cell, a self-developed water piston, pressure gauge and an overhead water tank. The results of the investigation showed that the permeability measurements of the coals were consistent at the different sites and locations of the coal mines. It also revealed that the difference in coal seam permeability was relatively small in Nigeria.


Publisher Nigerian Mining Jouurnal
Publication Type Journal
Publication Title Determination Of An Appropriate Exploitation Method For Sobi And Oloje Clay Deposits Of Ilorin, Nigeria For Production Of Bricks And Ceramic Work, Ilorin, Nigeria
Publication Authors Abdulraman S. O. and Olaleye, B.M.
Year Published 2012
Abstract

Current exploitation practice of Ilorin clay deposits in Nigeria has been investigated to be largely dominated by female artisans (old and young) who depend solely on crude implements such as sticks, spades and baskets with resultant premature abandonment of mined out pits. Exploratory pits were dug to probe the profile of the deposits in the two locations (Sobi and Oloje) and the borehole data of the deposits were used to produce isopach map of the deposits. Several equipment combinations were considered for the exploitation of the deposits. Stripping by bulldozer was favoured to be most appropriate.


Publisher Springfield Publisher
Publication Type Books
Publication Title Mineral Inventory Of Nigeria: The Need For Sustainable Industrialization
Publication Authors Olaleye B.M. and Jegede G.
Year Published 2009
Abstract

The solid mineral resources of Nigeria were collated and the investment potentials in the solid mineral sector of the country reviewed. The work revealed that the Nigeria nation is endowed with varieties of solid minerals commodities and also has all it takes to move to the cadre of major mineral players of the world and transform the country into an economic giant. Also the mineral policy, which is made liberal by the government of Nigeria, must be well publicized to arouse the interest of both indigenous and foreign investors in the solid mineral sector, as the need for the growth of the local industries is inevitable. There is the need for Nigeria to go into bilateral agreement with other countries producing solid minerals commodities to facilitate rapid and sustainable industrialization of the country. It is envisaged that the Nigerian government through policy pronouncement and actions will rekindle the hope that the sector would again take its pride of place in Nigeria’s socio-economic re-engineering and reconstruction.  


Publisher Global Journal Of Pure And Applied Sciences
Publication Type Journal
Publication Title Strength Characteristics Of Two Nigerian Rocks
Publication Authors O. Ojo and B.M. Olaleye
Year Published 2002
Abstract

see article


Publisher FUOYE International Journal Of Pure And Applied Science
Publication Type Journal
Publication Title Evaluation Of Some Mechanical Properties Of Granites In Parts Of South-West Nigeria
Publication Authors Olaleye B.M. and Jegede G.
Year Published 2016
Abstract

This work provided an estimation of some engineering properties and behaviours of some rocks in parts of South-West Nigeria for use under various applications, planning and design of construction projects. In mining operations especially drilling and blasting, the brittle fracture of rock in-situ is a very good indicator for rock fragmentation and rock strength characterization. This work determined some strength characteristics and fracture behaviour of granite rocks in four different locations in Ondo and Ekiti States, Nigeria. Granite rocks were sampled, prepared and tested in the laboratory for the Uniaxial Compressive Strength (UCS) using 1100kN compression machine, Tensile Strength (TS) using Brazilian test and Point Load Strength Index (PLSI) using point load tester. Analysis on the strength characteristics of the selected rocks show that the UCS range from 110.65-173.76 MPa, TS from 11.94 to 15.46 MPa and PLSI from 5.76 to 7.03 MPa. From the result of the analysis, the rocks are classified as very high and high based on their UCS and PLSI respectively. The degree and nature of deformation of the rocks indicated brittle and intergranular fracture. It was found out that the plane of fracture is simple and its nature and description is axial splitting failure in uniaxial compression. The results also show that the strength parameters are positively correlated. The rock strength and behaviour database generated will serve as useful information to granite quarry operators and investors in quarry planning, equipment selection and organization.