Tunnelling in rock by drilling and blasting : workshop hosted by Fragblast 10 : the 10th International Symposium on Rock Fragmentation by Blasting, New Delhi, India, 24-25 November, 2012

**Tunnelling in Rock by Drilling and Blasting** presents the latest developments in the excavation of tunnels using the drilling and blasting method. Examples of work conducted throughout the world including the Indian sub-continent, Australia, and Sweden amongst others are discussed. These tunnel projects serve to illustrate the challenges and importance of drilling accuracy, the effect of geology, methods of vibration prediction and control, and techniques for assessing tunnel performance in terms of overbreak and underbreak, advance and rock mass damage. A number of case studies demonstrate the ingenuity required to successfully excavate tunnels in demanding circumstances. Finally, an overview is provided of the software tools and IT, and the explosives and initiation products used to implement tunnel blast designs. **Tunnelling in Rock by Drilling and Blasting** is the outcome of the workshop, Tunnelling in Rock by Drilling and Blasting, hosted by the 10th International Symposium on Rock Fragmentation by Blasting (Fragblast 10, November 2010, New Delhi, India), and is essential reading for researchers and practitioners in tunnelling in rock by drilling and blasting. Front Cover 1 Table of contents 6 Preface 8 Organising Institution 10 Committees 12 Sponsors 14 High precision drilling 18 Improved tunneling performance through smarter drilling and design 24 Rapid excavation of tunnels using innovative drilling and blasting techniques 32 Blasting works in urban areas—A Singapore case study 40 Tunnelling through adverse geological condition: A case study 48 Controlled blasting for a new tunnel near an existing railway tunnel 54 Introducing specialized blasting techniques and sequences of excavation in tunneling works under critical conditions 58 Controlling shock waves and vibrations during large and intensive blasting operations under Stockholm City 66 Vibration measurements and modelling for blasting in a hard rock tunnel 76 Multiple seed blast vibration modeling for tunnel blasting in urban environments 90 Geometric assessment of perimeter control blasting in tunnels 96 Controlled blasting for underground hydroelectric projects—NIRM experience 108 Investigation of cracks in domestic houses near construction project in the Himalaya, India: A case study 118 IT & its role in underground blasting—an overview & future insights 124