DSpace@nitr >
National Institue of Technology- Rourkela >
Journal Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/407

Title: Development of Predictive Models for controlling Blast Induced Overbreak in Tunnels
Authors: Murthy, V M S R
Dey, K
Issue Date: 2004
Publisher: Indian Society of Rock Mechanics and Tunneling
Citation: Journal of Rock Mechnanics and Tunneling Technology, Vol 10, No 1, P 31-47
Abstract: Drilling and blasting continues to be the predominant rock excavation technique in driving horizontal openings and tunnels for underground construction purpose. Faster drivages, attempted these days for reducing the long gestation periods of projects, have often resulted in large overbreak. This is due to the unacceptable levels of ground vibration to which the rock is subjected. Factors contributing to this include longer pulls; burn cuts, higher explosive per hole and per delay etc. Blast-induced rock damage (BIRD) assessment based on far-field peak particle velocity (PPV) measurement, when extrapolated near the face, has often resulted in suggesting higher PPV threshold levels. Apart from this the geological and structural features play a dominant role in masking the intensity of blast waves. Therefore, near-filed monitoring using accelerometers has been attempted in one of the metal mines to study the blast damage in faces excavated by burn cut. Present seismographs av...
Description: copyright for this article belongs to the publishers
URI: http://hdl.handle.net/2080/407
Appears in Collections:Journal Articles

Files in This Item:

File Description SizeFormat
kdey8.pdf383KbAdobe PDFView/Open

Show full item record

All items in DSpace are protected by copyright, with all rights reserved.

 

Powered by DSpace Feedback