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Ground and Air Vibrations Caused by Surface Blasting. Volume 1. Executive Summary.

PB84191931

Publication Date	1983
Personal Author	Daemen, J. J. K.; Barkley, R. C.; Ghosh, A.; Morlock, C. R.; Shoop, S. A.
Page Count	132
Abstract	Ground and air vibrations induced by large surface blasts were monitored and the field results, as well as a large number of published results, were used to assess the performance of existing predictors and for the development of improved prediction methods. Field monitoring was performed with four seismographs giving complete wave records at limestone quarries, coal strip mines, and an open pit copper mine. Conventional analysis includes least square fitting of peak particle velocities and peak air overpressures with scaled distance formulations. Frequency content was analyzed and correlated with blast design (detonation sequence). Two new methods were developed to predict ground vibrations induced by blasting. The proposed analytical predictor accounts explicitly for inelastic attenuation and geometrical spreading, and calculates the peak particle velocity as a function of charge weight and distance. Statistical analysis of case studies confirms the consistent improvement over conventional scaled distance predictors. The second new predictor is a computer program simulating blasts including blast geometry, charge distribution, and detonation sequence and simulating propagation of individual pulses to any point of interest where effects are summed. A complete blast vibration results allowing prediction of frequency content and duration as well as peak velocities.
Keywords	Blast effects Shock waves Ground wave propagation Blasting Surface mining Acoustic waves Coal mining Open pit mining Mathematical modeling Damage Models simulation Seismographs Noise Surface blasting Ground motion Scaling laws Copper mining Air waves
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50 - Civil Engineering 79E - Detonations, Explosion Effects, & Ballistics 68B - Noise Pollution & Control
Corporate Authors	Arizona Univ., Tucson. Dept. of Mining and Geological Engineering.; Bureau of Mines, Washington, DC,
Supplemental Notes	See also PB84-191949.
Document Type	Technical Report
Title Note	Open file rept. (Final) 1 Oct 80-30 Sep 83.
NTIS Issue Number	198418

Ground and Air Vibrations Caused by Surface Blasting. Volume 1. Executive Summary.

Ground and Air Vibrations Caused by Surface Blasting. Volume 1. Executive Summary.
PB84191931

Publication Date	1983
Personal Author	Daemen, J. J. K.; Barkley, R. C.; Ghosh, A.; Morlock, C. R.; Shoop, S. A.
Page Count	132
Abstract	Ground and air vibrations induced by large surface blasts were monitored and the field results, as well as a large number of published results, were used to assess the performance of existing predictors and for the development of improved prediction methods. Field monitoring was performed with four seismographs giving complete wave records at limestone quarries, coal strip mines, and an open pit copper mine. Conventional analysis includes least square fitting of peak particle velocities and peak air overpressures with scaled distance formulations. Frequency content was analyzed and correlated with blast design (detonation sequence). Two new methods were developed to predict ground vibrations induced by blasting. The proposed analytical predictor accounts explicitly for inelastic attenuation and geometrical spreading, and calculates the peak particle velocity as a function of charge weight and distance. Statistical analysis of case studies confirms the consistent improvement over conventional scaled distance predictors. The second new predictor is a computer program simulating blasts including blast geometry, charge distribution, and detonation sequence and simulating propagation of individual pulses to any point of interest where effects are summed. A complete blast vibration results allowing prediction of frequency content and duration as well as peak velocities.
Keywords	Blast effects Shock waves Ground wave propagation Blasting Surface mining Acoustic waves Coal mining Open pit mining Mathematical modeling Damage Models simulation Seismographs Noise Surface blasting Ground motion Scaling laws Copper mining Air waves
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50 - Civil Engineering 79E - Detonations, Explosion Effects, & Ballistics 68B - Noise Pollution & Control
Corporate Authors	Arizona Univ., Tucson. Dept. of Mining and Geological Engineering.; Bureau of Mines, Washington, DC,
Supplemental Notes	See also PB84-191949.
Document Type	Technical Report
Title Note	Open file rept. (Final) 1 Oct 80-30 Sep 83.
NTIS Issue Number	198418