Prakash, A.J. and Pal Roy, P. and Misra, D.D. (2004) Analysis of Blast Vibration Characteristics Across a Trench and a Pre-Split Plane. International Journal of Fragmentation and Blasting (Fragblast) , 8 (1). pp. 51-60.

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Abstract

This paper presents the influence of various discontinuities, natural or artificial, on magnitude and frequencies of blast induced ground vibrations. These discontinuities were geological faults, a pond, a shaft incline, a trench and a pre-split plane interposed in the path of vibration propagation. In the post-trench region, ground vibrations in terms of peak particle velocity were significantly reduced and dominant frequencies in higher bands were consequently observed. Depth of trench with respect to blastholes were varied and consequent vibration characteristics were analyzed. The techniques of creating a trench and presplit plane were successfully implemented in controlling vibration and in increasing the explosives charge to meet the scheduled production target of an opencast mine. Comparisons of ground vibration characteristics affected by a trench and a pre-split plane of the same depth are described in the text. The findings lead to the conclusion that such experimental data are necessary for production blasting in open cast mines under constrained conditions.

Item Type:	Article
Uncontrolled Keywords:	vibration, damping, discontinuities.
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	21 Nov 2011 04:07
Last Modified:	14 Jul 2012 11:06
URI:	http://cimfr.csircentral.net/id/eprint/74

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