Investigating the Effect of Initiation Device on Environmental Effect of Blasting: A Case Study of Beautiful Rock Lokoja, Nigeria (A subsidiary of resurrection Power Inv. Ltd)

The research investigates the effect of initiation device on environmental effect of blasting.    The objectives of the research were achieved through field measurement and data collection. Vibration and noise generated during blasting operations were estimated using mathematical models. Various blasting agents and accessories used for blasting operations were also collected. The results revealed that the noise and vibration generated during blasting with NONEL is minimal as compared to the safety fuse and the electrical methods. It also has high blasting efficiency of 99.1%. Keywords: Initiation device, vibration, noise, blasting agents, blasting accessories, NONEL, safety fuse method, electrical method

Environmental Impacts of Sand Dredging in Awoyaya, Lagos State, Nigeria

The research analysed the environmental impacts of sand dredging in Awoyaya, Lagos State. Water and soil samples were collected from three different locations in the study area. The results of water analysis reveals that average pH of water is 6.16, the average temperature of water is 27.55?C, the average chloride of water is 0.11mg/l, the average turbidity of water is 118ppm, the average sulphate of water is 45.67ppm, the average total dissolve solid in water is 98.3mg/l, the average total suspended solid in water is 114.1mg/l, the average total solid of water is 213ppm, the average iron present in water is 0.07ppm, and the average Zinc present in water is 0.015ppm. The results of the physiochemical and geochemical parameters of soil show that the average pH of soil is 7.78, the average organic carbon, organic matter, nitrogen and phosphorous of soil are 0.42%, 0.72%, 0.05%, and 10.73% respectively and the average values of SiO2, TiO2, Al2O3, Fe2O3, MgO, CaO, Na2O, K2O present in the soil are 80.97%, 1.64%, 1.33%, 1.55%, 1.00%, 0.20%, 0.21%, 0.15 respectively. The analysis carried out shows that the dredging in Awoyaya has little impact on water and soil in the dredging area. Keywords: Environmental impact, Turbidity, Temperature, Organic Carbon, Organic Matter, Total dissolved solid, total solid, total suspended solid

Investigation into factors controlling the potential for dimension stone production of selected granites in south west Nigeria

South west Niaeria falls in the basement complex of Nigeria with abundant granites of different colours. Despite this, little exploitation has been undertaken. The investigation into factors controlling the potential of selected granites in south west Nigeria for dimension stone production is carried out to determine their suitability for different dimension stone applications. Among the factors investigated are aesthetic features, mechanical features and fracture network characterization. Some selected granites in Cornwall were also investigated to serve as control tests. From colour characterization using both conventional methods and a new colour characterization method using colour spectrum, Awo, Ewu, Supare, Ikere and Ikole granites were classified as Black, Green, Ivory White, Gold and Grey granites respectively and identified as 'first class/grade' colour (one colour), while Oore is classified as Pink granite and a 'second class/grade' colour (multicolour). From Cornwall, Carnsew and Holman's granites can both be described as grey colour and 'first class' colour (one colour). Variable texture was evident for the granites studied. For example, the texture exhibited by Awo, Ikole and Ikere granites Is equi-granular while Oore, Supare, Ewu, Carnsew and Holman's are porphyritic. The mineralogical analyses of selected granites in SW Nigeria using both transmitted light and a SEM identified, in addition to major composition of granites, amphibole as a trace mineral in Awo, Ewu and Oore granite with pyrite only in Awo granite.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Investigation into factors controlling the potential for dimension stone production of selected granites in south west Nigeria

South west Niaeria falls in the basement complex of Nigeria with abundant granites of different colours. Despite this, little exploitation has been undertaken. The investigation into factors controlling the potential of selected granites in south west Nigeria for dimension stone production is carried out to determine their suitability for different dimension stone applications. Among the factors investigated are aesthetic features, mechanical features and fracture network characterization. Some selected granites in Cornwall were also investigated to serve as control tests. From colour characterization using both conventional methods and a new colour characterization method using colour spectrum, Awo, Ewu, Supare, Ikere and Ikole granites were classified as Black, Green, Ivory White, Gold and Grey granites respectively and identified as 'first class/grade' colour (one colour), while Oore is classified as Pink granite and a 'second class/grade' colour (multicolour). From Cornwall, Carnsew and Holman's granites can both be described as grey colour and 'first class' colour (one colour). Variable texture was evident for the granites studied. For example, the texture exhibited by Awo, Ikole and Ikere granites Is equi-granular while Oore, Supare, Ewu, Carnsew and Holman's are porphyritic. The mineralogical analyses of selected granites in SW Nigeria using both transmitted light and a SEM identified, in addition to major composition of granites, amphibole as a trace mineral in Awo, Ewu and Oore granite with pyrite only in Awo granite.EThOS - Electronic Theses Online ServiceGBUnited Kingdo