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Paurush, Punit
- Evaluation of ground vibrations induced by blasting in a limestone quarry
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Authors
Punit Paurush
1,
Piyush Rai
1
Affiliations
1 Department of Mining Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221 005, IN
1 Department of Mining Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221 005, IN
Source
Current Science, Vol 122, No 11 (2022), Pagination: 1279-1287Abstract
Despite being a versatile and low-cost method, rock blasting produces undesirable severe effects. The present study aims to examine the ground vibrations produced by blasting, which are of serious concern to mine operators as well as the nearby inhabitants. Forty-nine field-scale trial blasts were conducted and recorded to measure ground vibrations produced by blasting in a limestone quarry in Rajasthan, India. The multivariate linear regression (MLR) and artificial neural network (ANN) techniques were used to predict the peak particle velocity (PPV) with distance between the blasting site and measuring station, charge per delay and scaled distance as the input parameters. Subsequently, a coefficient of determination (R2) was calculated using MLR and ANN approaches. Additionally, to verify whether the recorded events exceeded the threshold levels, the values of PPV and dominant frequency propounded by the United States Bureau of Mines (USBM), German standard (DIN), and Director General of Mines Safety, India were carefully scrutinized. Results were compared based on R2 values obtained by the USBM predictor equation, MLR and ANN techniques. It was found that ANN provided a good prediction with a high degree of correlation (0.901) in comparison to MLR (0.754). Also, frequency analysis for the study field showed that the dominance of frequencies was in the range 10–40 Hz. Although the values were within safe limits, disturbances may be witnessed in nearby structures if PPV values are high at lower frequency range.Full Text
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