Horisontal Raise Boring | Master Drilling

Master Drilling has pioneered HRB drilling technology and applications both in Africa and worldwide with an undercut level tunnel cut through a Kimberlite pipe in an underground diamond mine. A typical tunnel may be 4.3m x 4.3m diameter and 200m long.

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Sandvik DT912D Tunneling Jumbo For Underground Mining

Sandvik DT912D is an optimal machine for multifaceted ... Home Products Underground drill rigs and bolters Tunneling jumbos DT912D Tunneling jumbo. DT912D ...

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Applied Geotechnology - 1st Edition

Purchase Applied Geotechnology ... the techniques used in rock and earth excavation such as down-the-hole drilling, ... pillar support of underground excavations; ...

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Surface and Underground - GBV

Surface and Underground Excavations 2nd Edition ... 1.2 Surface excavations 2 1.3 Underground excavations 2 ... 4.5.2 Down-the-hole(DTH)drilling 100

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Drilling - Epiroc

Mechanical rock excavation. ... Search EN EN ZH ... Epiroc’s rugged face drilling rigs are built for blast hole drilling in underground mining and tunneling.

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Top hammer rock drills for underground and surface

Sandvik HL820T hydraulic rock drill is designed for drilling 64 - 127 mm diameter holes in Sandvik Surface drills and Underground long hole drill rigs. HL820ST Rock drill Sandvik HL820ST is a hydraulic top hammer rock drill designed for DL311 and DL321 un

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Underground excavations and structures - Britannica.com

Tunnels and underground excavations - Underground excavations and structures: While chambers in 1971 were being excavated in rock to fulfill a wide variety of functions, the main stimulus to their development had come from hydroelectric-power-plant requir

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Introduction to Underground Excavation by Drilling

Drilling and blasting are the most common methods for tunnelling and underground excavation. Working cycle of D & B excavation, excavation methods and charging methods for tunnels driving, shafts sinking and raise …

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US3885832A - Apparatus and method for large tunnel

1. An earth drilling machine for excavating tunnels comprising an elongated hollow hull having a frontal portion with cross section equal to the cross section of the final tunnel prior to installation of final tunnel wall lining and a rearward portion red

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Product catalogue - Tunnels & Tunnelling International

Our face drilling rigs are used for blast hole drilling in underground tunneling and mining applications. The large and extra large rigs are equipped with up to four booms,

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Boxhole Boring Machine (BBM) - Herrenknecht AG

Pioneering drilling technology for the exploration of geothermal energy at depths up to ... Boxhole Boring Machine (BBM) ... copper and other underground ore mines.

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IS 5878-2-2: Code of Practice for Construction of Tunnels

IS 5878-2-2: Code of Practice for Construction of Tunnels, Part II: Underground Excavation in Rock, Section 2: Ventilation, Lighting, Mucking and Dewatering

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МИНСТРОЙ - Exploration and drilling

Exploratory drilling and underground excavations as a part of the Gorna Arda Hydroelectric Complex; Tunisia Exploration of the Keph-ed-dur and Djebel Alima phosphorite deposits;

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US3885832A - Apparatus and method for large tunnel excavation

1. An earth drilling machine for excavating tunnels comprising an elongated hollow hull having a frontal portion with cross section equal to the cross section of the final tunnel prior to installation of final tunnel wall lining and a rearward portion red

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Modern Drilling Equipment for Underground Applications

Modern Drilling Equipment for Underground ... to a tunnel line laser. each drilling 77 holes and a ... ahead of the excavation.2m hole to be ...

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Tunnels and underground excavations | engineering

Tunnels and underground excavations: ... heading by drilling equipment and throughout the tunnel by high-velocity air ... various drill-hole patterns and the ...

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(PDF) Drilling and blasting as a tunnel excavation method

AS A TUNNEL EXCAVATION METHOD . ... most underground excavation in rock . ... drills and mechanized drilling equipment used in tunneling and drifting are designed to give .

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Underground Drilling - International Mining

In this month’s Spotlight Feature Article, from the pages of the June 2012 issues of International Mining, Editor Paul Moore reports that Underground Drilling remains a challenging environment, so continued improvements from key machine and component supp

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Read "Drilling and Excavation Technologies for the Future

Drilling and Excavation ... The National Academies Press ... it is obtained by reaction of the drilling assembly against the wall of the hole or tunnel, ...

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Tools for Underground Drilling - Fordia

The underground drilling environment presents a myriad of challenges, including groundwater unexpectedly encountered in the drill hole. Extremely high flow rates and pressures are not uncommon and can have disastrous results for a drilling operation.

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