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Hydraulic wedge to break hard rock in tunnel excavation

18/03/2008 · Hydraukic wedge on a boom of the excavator, the jumbo drilling the hole and the wedge break the rock.

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Drill Tunnel, Wholesale Various High Quality Drill Tunnel Products from Global Drill Tunnel Suppliers and Drill Tunnel ... Jumbo KJ212 for Hard Rock drilling in ...

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Tunnel Rock Drill Machine, Tunnel Rock Drill Machine

Alibaba.com offers 1,430 tunnel rock drill machine products. About 43% of these are mine drilling rig, 33% are mining machinery parts, and 2% are drilling machines. A wide variety of tunnel rock drill machine options are available to you, such as free sam

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Tunnel jumbo drilling rig - DT1120i - Sandvik Mining and Rock

Find out all of the information about the Sandvik Mining and Rock Technology product: tunnel jumbo drilling rig DT1120i. Contact a supplier or the parent company directly to get a quote or to find out a price or your closest point of sale.

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Wheel Type Full Hydraulic Tunnel Hard Rocks Jumbo Drilling

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TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE

TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE CHALLENGES ZHAO Jian ... to blast the rocks. Tunnel Boring Machine (TBM): It involves cutting rock by a full face boring machines. Tunnelling ... drilling jumbo, with drill plan stored in computer. No ma

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METHODOLOGY FOR PREDICTING AND HANDLING CHALLENGING ROCK

METHODOLOGY FOR PREDICTING AND HANDLING CHALLENGING ROCK ... In hard rocks dominated by discontinuities, core drilling is often carried out to study certain ... Probing is normally done as percussive drilling by the tunnel jumbo. A common number of holes

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TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND

TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE CHALLENGES ZHAO Jian ... to blast the rocks. Tunnel Boring Machine (TBM): It involves cutting rock by a full face boring machines. Tunnelling ... drilling jumbo, with drill plan stored in computer. No ma

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TUNNELLING IN ROCKS – PRESENT TECHNOLOGY

Modern rock tunnels are excavated by primarily two methods: Drill-and-Blast (D&B): It involves drilling charge holes advancing into rocks and using explosives to blast the …

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Tunnels and underground excavations: Tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock, such as limestone.

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Railway Tunnelling in Hard Rocks - study Material

Railway Tunnelling in Hard Rocks ... Next the muck is removed before repeating the process of drilling ... With the development of the 'jumbo' or drill ...

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Jumbo Drills Mining Machine, Tunneling Drilling

Jumbo drills for mining and tunneling ... Indeed every underground mining or tunnel is unique, ... FRAME TYPE FOR “THE DRILLING JUMBO ...

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6.1. GENERAL - Mining and Blasting

drilling site.Tunnel 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 6.2.-1. Types of holes in a tunnel face. Hard-rock TBMs can be

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Jumbo Tunnelling Drilling Rig-Quality Mine Exploration

Jumbo Tunnelling drilling rigs of MT series are designed to drill blast holes in underground mining and tunnelling. They are applicable for hard rocks mine tunneling operation in either small or big section tunnel.

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Hard Rock Wholesale, Rock Suppliers

Wheel Type Full Hydraulic Tunnel Hard Rocks Jumbo Drilling Machinery . US $450000-550000 / Set . 1 Set (Min. Order) 7 YRS . Zhengzhou Defy Mechanical & Electrical Equipment Co., Ltd. 77.8%.

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Boring Bar - practicalmachinist.com

4/17/2009 · I guess they are so high $$ because they must be exactly perpendicular to the boring bar shaft in order to bore a straight hole. I also have a "Serve Equip" boring bar machine that is built by Van Norman. It was the very 1st machine that I bou

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Tunnelling - SlideShare

Tunnelling in Rocks Tunnels are driven in rocks by drilling holes in the rock face, loading the holes with explosives, blasting and removing the broken rock Each sequence full cross section of the tunnel may be excavated, or one or more drifts may be ther

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Mineral Exploration Drilling Rigs-Help You Explore Mines

Jumbo Tunnelling drilling rigs of MT series are designed to drill blast holes in underground mining and tunnelling. They are applicable for hard rocks mine tunneling operation in either small or …

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china tunnel hard rocks jumbo drilling - shivfurniture.in

KJ311 hydraulic tunneling drilling rig, Hydraulic Top Hammer ... Feb 06, 2017 · KJ311 hydraulic tunneling drilling rig Hydraulic Top Hammer Drilling Jumbo apply to 12-35 square meters section of hard rock mine excavating working.

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Shaft Drilling Jumbo. The third machine that is currently biting through the hard rock in Nant de Drance is the new Herrenknecht Shaft Drilling Jumbo. After its commissioning in April 2013, Östu-Stettin Hoch- und Tiefbau GmbH is now working downwards with

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LBA's A-Z compendium - an expert's tunnelling glossary

From Advance Rate to Yankee brob, dig through the LBA tunnelling glossary to uncover hidden treasures and interesting underground trivia.

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