ppt blasting techniques in tunnel

Construction Planning, Equipment, CHAPTER , 3 CHAPTER 13 BLASTING ROCK ENCE 420 ©Assakkaf Slide No 4 INTRODUCTION ”Blasting" is performed to break rock so that it may be quarried for processing in
tunnel blasting techniques in difficult Special Tunnel Blasting Techniques for Railway Projects Special Tunnel Blasting Techniques for , In tunnel blasting, explosives are ,
3,350 108,000 17 M Special Tunnel Blasting Techniques for Railway Projects More Ramulu Central Institute of Mining & Fuel Research, Nagpur, India 1 Introduction Excavations of tunnels are common features in mining and civil engineering projects In absence of initial free face, solid blasting method is employed for excavation of tunnels, drifts and mine ,
controlled Blasting for civil construction in an , Blasting on this site was strictly controlled, because it was located in the middle of a busy construction site and tunnel portal that had to ,
Chapter 11 SPECIALIZED BLASTING TECHNIQUES BLASTING TECHNIQUES 168 There are several types of explosives that can develop the appropriate detonation pressure By knowing the detonation velocity and the .
Tunnel Blasting Techniques | Tunnel | Explosive Material Special Tunnel Blasting Techniques for Railway Projects More Ramulu Central Institute of Mining & Fuel Research, Nagpur, India 1 Introduction Excavations of tunnels are common features in mining and civil engineering projects In absence of initial free face, solid blasting method is employed for excavation of tunnels, drifts and mine ,
Hard rock tunnel boring, cutting, drilling and , 1227 Thuro, K, Plinninger, RJ, Hard rock tunnel boring, cutting, drilling and blasting: rock parameters for excavatability ISRM 2003–Technology roadmap for rock mechanics, South African Institute of Mining and Metallurgy, 2003
Chapter 11 SPECIALIZED BLASTING TECHNIQUES BLASTING TECHNIQUES 168 There are several types of explosives that can develop the appropriate detonation pressure By knowing the detonation velocity and the density of a given explosive, the detonation pressure can be calculated (Chapter 2 - Explosives) INITIATING DEVICES Avalanche blasting is based on a nonelectric detonating ,
Gautrain | For people on the move For people on the move Plan your trip, view schedules, fares and bus information and even reload your card Everything right here
Special tunnel blasting techniques - CIMFR contributions , Tunneling projects have become integral part of infrastructural development of power, irrigation and transportation sector Although recent developments in tunnel boring machines shared much load of tunneling projects, drilling and blasting method of tunneling has become inevitable due to its operational flexibility and low capital cost
Tunnel blasting techniques in difficult ground , Tunnel blasting techniques in difficult ground conditions AK CHAKRABORTY and JL JETHWA Central Mining Research Station Unit, 54B, Shankar Naoar, Naflpur 440 010, India Received 17 November 1993 Accepted 2 August 1994 Summary The quality of tunnelling can be improved by proper blast design which takes into account the rock ,
Drilling and blasting powerpoint 2003 - SlideShare drilling and blasting powerpoint 2003 1 seminar ondrilling & blasting equipments (2008-09) by yogesh s ghule veermata jijabai technological institute civil and environmental engineering department
Tunnel Blast Design - hkiegedorg Tunnel Blast Design Tunnelling – Selected Topics Joint Technical Seminar by AGS(HK), HKIE (Geotechnical Working Group on Cavern & Tunnel Engineering) & HKTS
Study and Quantification of Tunnel Works by drilling , Get ppt Study and Quantification of Tunnel Works by drilling and blasting method Download , blasting techniques, explosive requirements, .
Tunnels and underground excavations | engineering , Tunnels and underground excavations: , Tunneling techniques Basic tunneling system Tunnels are generally grouped in four , Blasting is carried on in a cycle .
Tunneling and TBM Method - p3planningengineer TUNNEL BORING MACHINE (TBM) METHOD There are two major shield methods around: earth pressure balanced (EPB) and slurry type shield machine
Blasting Design for Tunnels (PDF Download Available) PDF on ResearchGate | Blasting Design for Tunnels | ResearchGate, the professional network for scientists
Designing Blast Patterns Using Empirical Formulas Information Circular 8550 Designing Blast Patterns Using Empirical Formulas A Comparison of Calculated Patterns With Plans Used in ,
Tunnel design - Geotechnical Engineering Calculations , This chapter discusses under Tunnel design chapter, , relatively safe blasting techniques, etc Tunnel boring machines , Download as PowerPoint slide;
A New Perimeter Control Blast Design Concept for , A NEW PERIMETER CONTROL BLAST DESIGN CONCEPT FOR UNDERGROUND METAL/NONMETAL DRIFTING APPLICATIONS Stephen R Iverson, William A Hustrulid, and Jeffrey C Johnson
Appendix 22 Tunnel Construction Methods - , tunnel before further blasting Most tunnelling construction in rock involves ground that is somewhere Most tunnelling construction in rock involves ground that is somewhere between two extreme conditions of hard rock and ,
Underground Drilling and Blasting Training DVD - YouTube Oct 23, 2012· The third part of the DVD covers development drilling and blasting practices; and the fourth part discusses production drilling and blasting Target Audience Underground mine workers - the need to identify the potential hazards of working near or with explosives, and the protocols of re-entering a working area after blasting
How Tunnels Work - HowStuffWorks Workers generally use two basic techniques to advance a tunnel In the , Fire-setting is an alternative to blasting In this technique, the tunnel wall is heated with fire, and then cooled with water The rapid expansion and contraction caused by the sudden temperature change causes large chunks of rock to break off The Cloaca Maxima, one of Rome's oldest sewer tunnels,
TUNNELLING IN ROCKS – PRESENT TECHNOLOGY , TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE CHALLENGES ZHAO Jian Professor of Rock Mechanics and Tunnelling Swiss Federal Institute of Technology (EPFL) Lausanne, Switzerland Inaugural Lecture, EPFL 24 May 2007 Laboratoire de Mécanique des Roches −LMR 2 Contents Laboratoire de Mécanique des Roches −LMR Introduction – Including Brief History of Rock Tunnels ,
61 GENERAL drilling siteTunnel blasting differs from bench blasting in that tunnels have only one free surface available when blasting starts This restricts round length, and the volume of rock FIGURE 62-1 Types of holes in a tunnel face Hard-rock TBMs can be used in relatively soft to hard rock conditions, and best when rock fracturing & weakness ,
PPT – Tunnelling Methods PowerPoint presentation | , Drill and blast Shields and tunnel boring machines (TBMs) New , Excavation (or blasting) Supporting Transportation of muck Lining or coating/sealing , – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow - id: 139c46-MGZkZ
Tunnel blasting techniques in difficult ground conditions , The quality of tunnelling can be improved by proper blast design which takes into account the rock mass conditions The effects of different rock mass properties on tunnel blast performance need to.
PowerPoint Template: sports blasting tunnel - football , PowerPoint Template With Sports Blasting Tunnel - Football Themed Background And A Light Gray Colored Foreground Design
Underground Construction (Tunneling) Introduction The construction of underground tunnels, shafts, chambers, and passageways are essential yet dangerous activiti Working under reduced light conditions, difficult or limited access and egress, with
TUNNEL CONSTRUCTION - PowerPoint PPT Presentation TUNNEL CONSTRUCTION – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow - id: 154163-NDY0O