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english(30) deutsch(32) GeoResources Zeitschrift & Journal
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GeoResources Journal for Resources, Mining, Tunnelling, Geotechnics, Equipment and Energy

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GeoResources Journal 4-2015

30. November 2015
( 79176 Clicks / 62355 Downloads )

ISSN: Print 2364-8422 / Online 2364-8430

#Brummermann, Katrin #König, Manfred

We are pleased to present to you the current edition of the English Journal GeoResources.

Here is the table of contents. To download the GeoResources Journal - please click on the cover!

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Citation     Page: 5–6

Next Level Mining – Technology Convergence advances Mining Efficiency and Productivity

The mining industry currently faces a unique set of challenges. The article gives an impression of how automation and integration of information brings significant benefits to master the challenges.

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Citation     Page: 7–16

Possibilities for applying Geosynthetics for building new and redeveloping existing Bridge Abutments

The need for traic arteries to be renewed is considerable at present. This report provides proposals for resolving challenges posed by building new bridges and renovating existing ones through applying geosynthetics. Geosynthetic reinforced supporting structures as well as subsoil improvements and temporary structures using geosynthetics offer economic and logistical advantages for building new bridges and renovating bridge abutments. The report deals with fundamental principles and introduces current examples of application.

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Citation     Page: 17–22

Reinforced Soil Design using a two-part Wedge Mechanism: Justification and Evidence

Design methods for reinforced soil structures are normally divided into: external stability (deines structure dimensions) and internal stability (determines reinforcement layout). This paper examines a method of calculation which has been developed for the internal stability check based on a simple two-part wedge mechanism. The wedges are deined by a first plane across the width of the reinforced soil zone, and a second plane upwards through the retained backfill. Reinforcement intersected by the first wedge contributes to the equilibrium of forces. A large family of two-part wedges is defined, and sufficient reinforcement must be provided to ensure that all can achieve equilibrium without overloading the reinforcement. Extensive experience of using this technique indicates that the critical two-part wedge in an efficiently designed structure will normally be defined by a line crossing the reinforced soil zone at about 45°, then extending through the backfill at the Coulomb angle. If seismic inertia forces are added, then the angles of both wedges will become less steep. The two-part wedge mechanism is compared with more comprehensive stability analyses, as well as observed behaviour in shaking table tests on small-scale reinforced soil walls.

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Citation     Page: 23–28

Creative geotechnical Solutions for Renovating the Dresden Old Masters Picture Gallery in the Zwinger – Part 3: Extending the Tunnel for an underground Museum Passage

Renovating the Old Masters Picture Gallery in the east wing of the Zwinger in Dresden also represents a sophisticated task in geotechnical terms. Part 3 of this report deals with execution of an enlargement and lengthening of a tunnel accomplished by trenchless means. It is intended to serve as an underground museum passage for visitors to the Picture Gallery. Special challenges were presented by the tricky subsurface, conservation, ongoing museum operations and existing pipelines and cables.

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Citation     Page: 29–33

Albabstieg: Tunnel Fire Service is ready for Action

The establishment of tunnel fire services for involvement in tunnels is new. This became necessary as fire brigades in Germany are not appropriately trained and equipped and the members of the force lack the necessary underground experience. As a result, they cannot properly cope with incidents involving fires on tunnel sites. In addition, there is the penetration depth restricted to 200 m from the “smoke limit” based on a directive from the Land of Baden-Württemberg currently under preparation. The establishment of tunnel fire services is following a new but also correct path. This report describes the setting up and organization of such novel tunnel fire brigades, which are based on the concept of the mine fire services that have been successfully established in German mining for decades. An approach by the regional government that merely foresees the setting up of an initial response is examined critically for this would signify a decisive climb-down from the actual situation presented here.

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Citation     Page: 34–36

Mine Safety: Complying with Canada’s new lower NO2 Limits by implementing appropriate Gas Detection Technology

Nitrogen dioxide (NO2) is a highly toxic gas that is generated as a component of diesel engine emissions and as a byproduct of blasting. To support mine safety, there is an emerging global trend to reduce levels of human exposure to NO2 in mining workplaces. This article addresses current NO2 limits in Canada and new legislation designed to protect worker health and improve mine safety. It also explores innovative gas detection technologies that can help mines comply with this new legislation.

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Citation     Page: 37–40

Currency Volatility and Impact on Mine Production Consumables

Purchasing raw-materials directly from overseas, or purchasing goods with a large imported content, adds an extra dimension to the basket of procurement risks a company must consider ‘Exchange Risk’. This is that risk of losing money due to movements in exchange rates. This paper examines challenges associated with currency volatility on mine production consumables manufacturing companies and strategies a buyer company can employ over manufacturer in managing the impact of these fluctuations.

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