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Drill and Blast

The Richland Creek tunnel consisted of a 5 700-foot-long tunnel 8 feet in diameter between two shafts Controlled detonation drill-and-blast tunneling method was used for 4 300 feet of hard rock consisting predominately of 33-ksi gneiss Both jacklegs and a drill jumbo were used for blast hole drilling in the small diameter tunnel heading...

Case Study Tunnel Drill and Blast Feasibility

the tunnel at up to 53 metres per blasted round Such round lengths for the drilling and blasting would deliver excellent tunnelling rates that would minimise the construction time of the tunnel Table 1 shows the predicted advance per blasted round for two possible blasthole diameters and...

What is Drill And Blast Tunneling

Drill and blast tunneling is a method of excavation involving the controlled use of explosives to break rock It was the primary means of tunneling through rock prior to the advent of tunnel boring machin Like trenchless construction and horizontal directional drilling drill and blast tunneling is a form of subsurface construction...

tunnel drilling and blasting sale

25-10-2021 0183 32 drilling and blasting machines for sale - crusherasia - Know More Mine drilling and blasting machine for sale hard rock tunnel boring Blasting drilling...

tunnel blast drilling machine tunnel blast drilling

tunnel blast drilling machine Wholesale Various High Quality tunnel blast drilling machine Products from Global Sodium Tripolyphosphate Suppliers and tunnel blast drilling machine Factory Importer Exporter at Okchem...

drilling and blasting equipment

The patented StemPlug design increases fragmentation and fracturing while reducing fly-rock air-blast and dustOver 3 000 000 sold worldwide Experienced drilling and blasting contractor specializing in directional boring rock bolts controlled explosions for bridges highways hom Offers road building tunnel drilling underwater blasting...

Drill and Blast Tunnelling

23-10-2013 0183 32 After discussing the processes of drilling blasting and mucking and highlighting the effects of blasting on the surroundings this chapter describes some possibilities of the combinations of drill and blast with mechanised tunnelling for larger cross-sections The chapter also discusses mechanisation and automation issues which can simplify...

Designing Blast Patterns Using Empirical Formulas

For sale by the Superintendent of Documents US Government Office Washington DC 20402 Price 45 cents Stock Number 2 04-1145 technique by comparing drill and blast pattern dimensions used in the quarry with those determined by the presented method...

Tunnel Boring Machine 2 Types of Tunnel Boring Machine

Tunnel boring machine can be used as an alternative to the conventional drilling and blasting method of tunnel construction The machine is manufactured in such a way that only limited disturbance is caused to the surrounding soil layers and to ensure the excavated tunnel has a smooth wall Hence the cost of the tunnel lining can be reduced...

Jumbo Drills Mining Machine Tunneling Drilling Equipment

Drilling equipments CMM 1 2 or 3 drilling arms can be equipped with a positioning assistance system From universal and multidirectional kind Dimensions scalable depending on the specifications High lifting capacity and variable Several grooves models Available with...

pdf Download Tunneling in Rock by Drilling and Blasting

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...

Tunneling Safety

Tunneling work is widely carried out in the construction of the railway road projects and irrigation This work is specialized and hazardous because of cramped working space wet and slippery flooring artificial lighting Usually characterized by inadequate ventilation obnoxious gases unseen weaknesses of rock handling of explosives hauling muck etc leading to accidents in this...

Drill and Blast Tunneling Practices

Drill and Blast Tunneling Practices Gerhard Girmscheid1 and Cliff Schexnayder FASCE2 Abstract High-performance drill and blast methods for tunnel construction require that each of the individual working elements that constitute the construction process are optimized and considered as a system of sequential and parallel activiti...

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 be assessed The strength of the formation and joint orientation critically affected fragmentation and overbreak in a model study of blasting Similar effects were noted in situ when the performance...

Amazon Tunneling in Rock by Drilling and Blasting

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...

Tunneling in Rock by Drilling and Blasting

05-11-2012 0183 32 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...

Tunneling in Rock by Drilling and Blasting

05-11-2012 0183 32 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...

PDF Drilling and blasting as a tunnel excavation method

PDF On Jan 1 2000 214 zgür SATICI published Drilling and blasting as a tunnel excavation method Find read and cite all the research you need on ResearchGate...

Tunneling in Rock by Drilling and Blasting

23-08-2020 0183 32 74 Tunneling 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...

TUNNELS SHAFT AND DEVELOPMENT HEADINGS BLAST DESIGN

drilling and blasting competitive with other mechanical excavation methods HEADING ROUND DESIGN limits of pre-existing drilling equipment In small tunnels and raises and in shafts of all sizes hand held drills are often used to drill holes ranging from 32 to 41 mm 1 188 to 1 5/8 in...

BEST PRACTICES IN DRILL AND BLAST

blasting New GPS-enabled applications have improved strata recognition capabilities that help drill and blast engineers develop more appropriate and more suitable blast designs Engineers can create designs in the offi ce and upload them to the drill rigs by remote means drillers can see the patterns from their drill rigs as sent by drill...