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Importance of Blast-Design in Reduction of Blast-Induced Vibrations
International Journal of Science, Technology and Society
Volume 2, Issue 3, May 2014, Pages: 53-58
Received: May 6, 2014; Accepted: May 17, 2014; Published: May 30, 2014
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Authors
AJAKA, Ebenezer Oyedele, Department of Mining Engineering, the Federal University of Technology, Akure, Nigeria
ADESIDA, Patrick Adeniyi, Fountain Construction Company, Km 3, Akure-Owo Expressway, Akure, Nigeria
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Abstract
The dissipated energy generated during blasting creates environmental problems in the form of ground vibration, air overpressure and flyrock. With increasing mining and construction activities in areas close to human settlements, ground vibration has become a critical environmental issue as it can cause human annoyance and structural damage. The magnitude of ground movement was measured in term of Peak Particle Velocity (PPV) with the aid of USS 2000-DK Seismograph. Site constant K, and site geological factor m were determined for both quarries by plotting the log-log graph of the maximum PPV against scaled distance. The data collected for the twenty blasting activities in each of the quarry sites have shown that the peak particle velocities (PPV) recorded varied directly with the charge weight per delay but inversely with scaled distance (SD) and shot to monitored distance for both selected sedimentary and igneous rock. A comparative analysis between the results obtained for constant charge per delay of 1000 kg, and monitoring distance of 500 m, 750 m and 1000 m were carried out. The magnitude of vibration for limestone is about twice that of granite at 300 m from the shot point and increase to about five times at 2200 m. This is evident when considering the main mechanisms which contribute to ground motion dissipation such as; damping of ground vibrations which cause lower ground vibration frequencies with increasing distance, discontinuities causing reflection, refraction and diffraction, internal friction causing frequency dependent attenuation, which is greater for coarser grained rocks and geometrical spreading of rock.
Keywords
Blast-Induced Vibrations, Scaled Distance, Peak Particle Velocity, Seismograph, USBM Predictor Equation
To cite this article
AJAKA, Ebenezer Oyedele, ADESIDA, Patrick Adeniyi, Importance of Blast-Design in Reduction of Blast-Induced Vibrations, International Journal of Science, Technology and Society. Vol. 2, No. 3, 2014, pp. 53-58. doi: 10.11648/j.ijsts.20140203.14
References
[1]
Abdel-Rasoul, E. I., (2000). Assessment of the particle velocity characteristics of blasting vibrations at Bani Khalid quarries. Bulletin of the Faculty of Eng., Vol. 28, No. 2, Assiut University, Assiut, Egypt, pp. 135 - 150.
[2]
Douglas, E.L., (1989). An Investigation of Blasting Criteria for Structural and Ground Vibrations pp.1-1
[3]
Dowding, C.H., (1985). Blast vibration monitoring and control. Englewoods Cliffs, NJ: Pren-tice-Hall; pp. 288–90.
[4]
Dowding, C.H., (1992). Suggested Method for Blast Vibration Monitoring. Int J Rock Mech, January, 145-156.
[5]
Federal Environ-mental Protection Agency, (1991). Interim Guidelines and Standard for Industrial Effluents, Gaseous Emission and Hazardous Waste in Nigeria. pp. 52
[6]
Pal, B. K. and Brahma K.C., (2010). An Application of Regression Model for Evaluation of Blast Vibration in an Opencast Coal Mine – a Case Analysis, Canadian Journal on Com-puting in Mathematics, Natural Sciences, Engineering & Medicine Vol. 1, No. 3, April 2010 pp106-109.
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