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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.11 [2004] >
IJEMS Vol.11(3) [June 2004] >
| Title: | A new predictor for ground vibration prediction and its comparison with other predictors |
| Authors: | Rai, Rajesh
Singh, T N |
| Issue Date: | Jun-2004 |
| Publisher: | CSIR |
| IPC Code: | Int. Cl.7 E 21C 41/00 |
| Abstract: | In surface mining, explosives in
huge quantity are being used for fragmenting
the rock mass but only a part of
the explosive energy is used in doing the useful work, the rest is spent in
redundant phenomena such as ground vibrations, noises and air blasts. The
elastic energy which is at a level less than the energy required to break the
rock, gives rise to ground vibration. Airblast occurs when the gases produced
during blasting escape to the atmosphere through existing weakness planes or
rock displacement. Ground vibration and airblast both are matter of great concern
as it causes damage to the existing surface structures and nuisance to the
residents in the closer vicinity of the mine. It attracts more attention as the
mines are approaching near exceedingly populated areas. A number of vibration
predictors have been proposed which can be used to calculate the safe charge
that can be initiated per delay, with minimum spoil to environmental. An
attempt has been made to propose a new vibration predictor to calculate the
safe charge per delay more precisely.
Its results are compared with other predictors also. A program has been
developed for analyzing the data from the field observations. A large number of
blast data with wide variation in physico-mechanical properties were collected
and analyzed to perceive the accuracy and applicability of the proposed
predictor equation. |
| Page(s): | 178-184 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.11(3) [June 2004]
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