Babatunde Adebayo | Federal University of Technology Akure (original) (raw)

Papers by Babatunde Adebayo

Arabian journal of geosciences, Mar 14, 2024

International journal of engineering and advanced technology studies, Jan 15, 2024

Social Science Research Network, 2022

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2016

This paper evaluates brittleness and packing density to analysis their effects on blast-hole cutt... more This paper evaluates brittleness and packing density to analysis their effects on blast-hole cutting yield for three selected rocks in Nigeria. Brittleness test (S20) was carried out in accordance with Norwegian Soil and Rock Engineering and the Brittleness Index (BI) for the selected rocks were estimated. The packing density determined from the photomicrograph of the rock samples. The grain size of 45 blast-holes drill cuttings collected from three selected while drilling of these rocks were determined using standard method of America Society for Testing and Materials (ASTM) D 2487. The brittleness values are 50%, 44% and 42% for micro granite, porphyritic granite and medium biotite granite respectively. The result of BI varied from 10.32-11.59 and they are rated as moderately brittle rocks. The values of packing density varied from 92.20-94.55%, 91.00-92.96% and 92.92-94.96% for all the rocks. The maximum weights of blast-hole particle size retained at 75 µm are 106.00g, 103.28 g and 99.76 g for medium biotite granite, micro granite and porhyritic granite respectively. Packing density values have correlation to some extent with (S20) values hence, this influence the yield of blast-hole cuttings as drilling progresses. The minimum weight of blast-hole cuttings particle size retained at 150 µm agrees with brittleness index classification for micro granite.

Flyrock is a major environmental and safety issue during mine production blasting. This can affec... more Flyrock is a major environmental and safety issue during mine production blasting. This can affect workers’ safety and efficiency. Blasting in mines can cause rock fragments to travel far to endanger workers, machinery, and nearby structures. Also, many rock excavation projects anticipated fly-rocks and prevent its impact. This study uses Long Short-term memory networks and seven other machine learning methods to predict the Akoko Edo dolomite Quarries' fly-rock distance. Two hundred and fifty-eight (258) blasting data samples were obtained for model-building. Fly-rock prediction was created using LSTM machine learning. The proposed LSTM fly-rock prediction model was tested using bidirectional recurrent neural networks (BRNN), support vector regressions (SVR-S, SVR-RBF, SVR-L, and SVR-P), and random forest (RF) models. Each modeling method is detailed enough for other scientists to replicate. The top three influencing parameters, which have different correlations with fly-rock, ...

Materials and Geoenvironment

in English The Golden Girl dolomite quarry was selected by the authors to develop predictive arti... more in English The Golden Girl dolomite quarry was selected by the authors to develop predictive artificial neural network (ANN) models and software for optimization of blast fragment size distribution. Blast images from the quarry were analysed using WipFrag©. Seven controllable and two uncontrollable blast parameters, and WipFrag© image analysis results for fifty blasts were used to train ANN models. The reliability of the established models was tested, and the Bayesian regularization algorithm with the architecture of 9-8-3 was found to be superlative. The superlative model was compared with the modified Kuz-Ram model and found to be accurate. The optimum ANN models were translated into mathematical formulas and used to develop user-friendly software called BlastFrag optimizer. The software was validated with R2 greater than 80% for all models and was found suitable for predicting blast fragment size distribution. The optimized result revealed that percentages for oversize and mean-s...

International Journal of Mining and Mineral Engineering

Journal of Seismology, 2022

Bulletin of Engineering Geology and the Environment

Journal of Applied Sciences and Environmental Management, 2018

The study investigated the effects of post-blast explosive residues on ecosystems around Prodeco ... more The study investigated the effects of post-blast explosive residues on ecosystems around Prodeco Quarry industry in Calabar Nigeria by collecting explosives residues and air/fumes samples. The variation between the intensity and temperature of explosive dissolution in the mine environment shows that TNT appears at the lowest temperature of 10 0 C and PETN reflected at about 35 0 C and NG shows almost at 58 0 C. Consequently, 5-15 kg of ANFO produced 10-30 lit/kg of nitrogen oxide compound (NOx) fumes while 20 kg ANFO produced 40 lit/kg of carbon monoxide fume. Also, 0.2 µg/L concentration of explosive in water recorded the highest mean recovery of 116.0 % while 1.0 µg/L recorded the highest values of 99.0 %. The mean recovery in soil sample is range between 105.0-126.0 % while that of forest is range between 91.0-107.0 % with the 50.0 µg/L concentration of explosive. The study concluded that the contaminating effects of the explosives residues have direct and indirect influences on the growth and development of the ecosystems.

The potential of some selected Nigerian rock samples to wear drill bit was investigated. In order... more The potential of some selected Nigerian rock samples to wear drill bit was investigated. In order to achieve this, the point load strength for the three rock samples were tested using point load testing machine and tensile and compressive strength were estimated from the point load strength. The rebound values for the samples were determined as a measure of hardness using Schmidt hammer. Also, the mineral compositions of the samples were determined using thin – section. The results obtained were used to evaluate wear potential of the samples. The compressive strength, tensile strength, point load strength, hardness have values ranging from 209.30 – 244.85 Mpa, 11.40 – 12.95 Mpa, 6.97 – 8.16 Mpa and 47.50 – 52 respectively. Also, Vickers Hardness Number of Rock of 534.36, 895.10 and 898.71 kg/mm2 were obtained for samples A, B and C respectively. Equivalent Quartz Content of 41.5%, 66.2 % and 69.18 % were obtained for samples A, B and C respectively. These show that the three samples...

AU Journal of Technology, 2011

The relationship between textural properties of selected Nigerian rocks and bit wear rate was inv... more The relationship between textural properties of selected Nigerian rocks and bit wear rate was investigated. These rock samples were tested in the laboratory for mineral composition, silica content and porosity. Also, average grain size and packing density were determined from photomicrograph of the samples using empirical equations proposed by researchers. Wear rates for each rock sample obtained on field were correlated with the textural properties to establish their relationships. The percentages of quartz and biotite are 42%, 30.56% for feldspar granite; 51.11%, 17.78% for biotite hornblende granite; and 57.14%, 26.98% for coarse biotite granite; respectively. The results show that all textural characteristics have high coefficient of correlation for all the samples. The highest wear rate was experienced on coarse biotite granite having mean packing density of 93.46%. This has revealed that wear of rock drill bit in quarries is related to textural rock properties and this will be...

This paper examines cuttability of selected rocks in south-western (S/W) Nigeria. Rock samples fr... more This paper examines cuttability of selected rocks in south-western (S/W) Nigeria. Rock samples from this region were tested for rebound hardness value, uniaxal compressive strength, and silica content using Schmidt hammer, 1100KN compression machine and X-Ray fluorescence spectrometer, respectively. These properties were correlated with the cutting rate of the rock samples. The regression carried out gives values of R = 0.863, R = 0.861 and R = 0.860 for cutting rate and rebound hardness value, uniaxal compressive strength and silica content, respectively. This shows that there is a strong linear relationship between the cutting rate and the three rock properties investigated. The model equations from this regression could be used to estimate the cuttability of granite and limestone from this zone.

Slope stability is of significant importance for sustainable development in mining, civil-enginee... more Slope stability is of significant importance for sustainable development in mining, civil-engineering, and urban planning. This paper attempted to assess the stability conditions of road cut debris slopes along the National Highway-7 (NH-7), Uttarakhand, India. The engineering parameters of the slope forming materials and other inputs used for slope stability analysis were evaluated based on different geotechnical tests such as direct shear strength, density analysis test, rock hardness tests, particle size analysis, Atterberg limits, and XRD analysis for the finer fraction of the slope materials. The slope stability was evaluated based on the limit equilibrium method (LEM) and finite-element methods based on strength reduction factor (FEM-SRF). The results showed that the slope materials are mainly comprised of well-graded sands, gravelly sands, with little or no plasticity and display no clay activity along with moderate cohesion (19.4–31.5 kPa) and internal friction angle (26.23...

FUOYE Journal of Engineering and Technology, 2019

In this research, grinding energy of selected rock samples collected from South West Nigeria was ... more In this research, grinding energy of selected rock samples collected from South West Nigeria was determined using comminution theory in order to evaluate suitability of rock for aggregate production. Bond Work Index (BWi), Aggregate Impact Value (AIV) and Aggregate Crushing Value (ACV) of samples was characterized and correlated. The work index of the charnockitic rock, granite gneiss, porphyritic granite –labelled PG1 and porphyritic granite –labelled PG2 of samples was found to be 17.12 kWh/t, 13.72 kWh/t, 13.64 kWh/t and 12.76 kWh/t respectively. The ACV of the charnockitic rock, granite gneiss, porphyritic granite (PG1) and porphyritic granite (PG2) was determined to be 26.2 %, 27.3 %, 27.6 % and 27.8 % respectively; while the AIV of the samples, in same order, was 11.2 %, 13.2 %, 19.1 % and 18.4 % respectively. Following high correlation coefficient of 0.98% between BWi and ACV, hardness of rock materials are classified as ‘very difficult’, ‘difficult’, ‘medium’, ‘easy’ and ‘ve...

This paper examines the analysis of variability of the rock properties influencing tool wear in q... more This paper examines the analysis of variability of the rock properties influencing tool wear in quarries. Rock samples were collected from six different locations within the South Western Nigeria. These samples were tested in the laboratory for hardness, uniaxial compressive strength, point load strength index, silica content, and mineral composition using Schmidt hammer, 1100kN compression machine, X-Ray fluorescence spectrometer and petrological microscope respectively. The equivalent quartz content for all the samples were determined as well. The results obtained show that the value of Schmidt rebound value, uniaxial compressive strength, point load strength index and equivalent quartz content varies from 47.10-52.60, 90.6-124.71MPa, 7.59-13.54 MPa and 45.60-63.53%. The average coefficient of variation for all the samples ranges 0.16-3.01%. All wear parameters have relationship with silica content.

Grindability of granite and Iron-ore was investigated in this work. Samples were collected from J... more Grindability of granite and Iron-ore was investigated in this work. Samples were collected from Julius Berger Quarry and National Iron-Ore Mining Company (NIOMCO), Itakpe. Particle size distribution of the samples by means of sieve shaker and grindability of samples were also determined. The results obtained show that weight retained varies from 36.71 g to 183.1 g for granite while that of iron-ore vary from 9.65 g to 87.78 g. In addition, it was observed that granite and iron-ore have grindability values of 0.061 g/rev and 0.926 g/rev respectively. This confirmed that granite requires more energy to be grinded.