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english(31) deutsch(33) GeoResources Zeitschrift & Journal
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GeoResources Journal for Resources, Mining, Tunnelling, Geotechnics, Equipment and Energy

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GeoResources Journal 4-2022
Special Topic: Focus on Responsibility

23. December 2022
( 1850 Clicks / 906 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 click on individual headlines of the articles!

 

Cover page: Main Mine Fans `Made in Germany´

For many years, the focus of our CFT ventilation activities has been on the total air supply for mines.

The reference project shown consists of two identical, single-stage main mine fans with an impeller diameter of 3 m. The motor power has a total of 2 x 1.3 MW at an operating voltage of 6 kV at 50 Hz.

The in-house CFT fan test stand in Marl (NRW), where impeller diameters of up to 4.2 m can be tested in compliance with standards, will be completed in 2023.

AIR – cleaning, generating, heating, cooling, and moving – is our mission.

For this purpose, we responsibly support you with technical know-how and innovative spirit.
CFT GmbH

#Download #GeoResources Journal #responsibility #corporate culture #sustainability #recycling #circular economy #concrete #raw materials #mine water #critical minerals #nuclear waste #Africa #Tanzania (TZ) #Hermann Paus Maschinenfabrik GmbH #SMT Scharf GmbH #SIEMAG TECBERG GmbH #Mining #Tunnelling #Geotechnics #Energy #Geosynthetics

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     Citation     Page: 5

Focus on Responsibility – from inner Conviction

#Brummermann, Katrin

Taking responsibility as a result of inner conviction – in both private and professional contexts – helps us cope with today’s immense personal and societal challenges.

#Download #GeoResources Journal #responsibility #Editorial #future #conviction #Mining #Tunnelling #Geotechnics #Energy

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     Citation     Page: 6–7

Doing well, doing good

#Stith, Charles R. #Stith, Mary Mildred

The Pula Group has embraced a dynamic model for corporate citizenship that provides a conceptual framework for crafting a strategy for a company “to do well, while doing good”. The model is a guide for corporations to be more responsible citizens in the communities where they do business.

#GeoResources Journal #Download #responsibility #ESG (Environmental, Social, Governance) #corporate culture #Foreword #The Pula Group #Mining #environment protection

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Citation     Page: 8–12

Corrosion Protection of Micropiles

#Nottingham, Racquel #Mastrantuono, Marc

Micropiles often provide a favourable solution for deep foundation problems especially when significant constraints such as confined construction sites or vibration limitations have been identified. Often the durability of buried steel elements is closely examined in order to determine the rates of corrosion and methods to reduce this while still maintaining the structural integrity. Practices such as sacrificial corrosion loss or plastic sheaths have become the go-to methods of corrosion protection. Other solutions which have been developed, include protection with grout encapsulation. This paper deals with corrosion protection of micropiles and the guidelines provided in codes and standards with a special focus on EU and USA. Different methods are compared.

#Download #GeoResources Journal #corrosion protection #durability #micro piles #structural integrity #FRIEDR. ISCHEBECK GMBH #Geotechnics #grouting #grouting works

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     Citation     Page: 13–20

Sustainability in Construction – Closing the Loop for Geosynthetics

#Depenbrock, Niclas #Flamme, Sabine #Heimbecher, Frank #Walter, Gotthard

Geosynthetics have been used in various geotechnical applications for several decades now. Solutions with geosynthetics contribute to the conservation of granular materials and to a reduction.

#GeoResources Journal #Download

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     Citation     Page: 21–26

On the autogenous Healing of Cracks in waterproof Concrete Structures – Experiences in the Field and Conclusions drawn

#Edvardsen, Carola

Structural planning engineers usually refer to EN 1992-3 when designing watertight concrete (WU concrete) structures such as basements, tunnels and water tanks. This standard can be interpreted in such a way that continuous cracks (separating cracks) are admissible. However, continuous cracks of between 0.05 and 0.20 mm in width are only acceptable provided they heal within a short space of time. Without this self-healing process steel-concrete structures are at risk of reinforcement corrosion and the structural integrity of the system may well be compromised unless suitable countermeasures are put in place. The following paper seeks to explain the causes of such cracks and the self-healing mechanisms at work. Practical examples are presented showing the serious consequences that can result for waterproof structures when wrong assumptions are made at the design stage about the self-healing properties of cracks.

#Download #GeoResources Journal #concrete #damages #planning #structural integrity #FH Münster #A.S.T. Bochum GmbH #Geotechnics #Tunnelling #sealing sheets, geomembranes #sealing #sealing technique #injection technology #injection work

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     Citation     Page: 27–29

The Emscher Restoration Project: a real Success Story for Germany’s most populous State

#Pasche, Eckart

For nearly a hundred years the Emscher served as an open wastewater channel that helped to kick-start the development of the Ruhr basin as a centre of industry in North Rhine-Westphalia. The river has now been cleaned up and has been completely free of sewage since the end of 2021. The Ruhr Museum in Essen has been holding special exhibitions to celebrate the event.

#GeoResources Journal #Download #Emscher (Köttelbecke) #Germany (DE) #exhibition #environment protection #renaturation #Tunnelling #Supply tunnels #special civil engineering #hydraulic engineering

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     Citation     Page: 30–32

Pula Group’s Graphite Project positions Tanzania in the World’s Clean Energy Transition

#Stith, Mary Mildred

Tanzania hosts world-class graphite deposits and the Pula Group leads with a profitable and socially responsible model for exploration.

#Download #GeoResources Journal #energy transition #CO2-reduction #decarbonisation #ESG (Environmental, Social, Governance) #graphite #Tanzania (TZ) #Africa #raw materials #The Pula Group #Mining #Energy

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     Citation     Page: 33–38

Mine Water as a Resource for Critical Raw Materials in Germany

#Reker, Bastian #Westermann, Sebastian #Melchers, Christian

The new IAW33 research project being carried out by the Research Centre of Post-Mining at TH Georg Agricola University of Applied Sciences (THGA) is looking at the possibilities for extracting critical and valuable resources from mine water and its precipitates. This involves taking samples at a number of RAG water pumping stations in the Ruhr, Saar and Ibbenbüren areas in order to draw a comparison between the constituents of mine water and those substances that have been deemed as critical by the European Commission [1, 2]. The research will also examine whether and how the target elements detected in the slurries of the precipitates and preparation plant residues are able to accumulate by way of various co-precipitation processes. This project therefore constitutes an important step towards strengthening resource independence from third countries and will also do much in helping mine water to be seen as a ‘reusable material’.

#GeoResources Journal #Download #Technical University of Applied Sciences Georg Agricola, THG #mineral resources #RAG Stiftung #resources #critical minerals #cobalt #manganese #nickel #copper #strontium #mine water #research #RAG Aktiengesellschaft #Mining #abandoned mining #environment protection

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Citation     Page: 39–48

Practical Examples of Concrete Logistics in Shaft Sinking – a real Challenge for Transport and Handling Operations

#Ahlbrecht, Thomas

Like steel, concrete is a vital material for shaft construction work and is needed in practically every undertaking of this kind. This paper examines the special aspects associated with the use of concrete in shaft sinkings, this being dependent on the nature of the assignment and on the local conditions. Practical examples are given to illustrate and explain the techniques used for shaft restoration and repair, shaft deepening and new construction projects.

#Download #GeoResources Journal #practice report #concrete #steel-fibre concrete #specialist mining company #REDPATH DEILMANN GmbH #RAG Aktiengesellschaft #K+S AG #Slavkaliy GmbH #Mining #underground mining #shaft sinking #transport, lifting technology #shaftsinking with ground freezing #shaft lining, shaft support system #shaft sinking #shaft boring machines #shaft hoisting facilities #shaft rehabilitation #rodless shaft boring

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Citation     Page: 49–53

The Konrad Nuclear Waste Repository – Renovation and Reconstruction Work in the North Compartment of Shaft Konrad 1

#Janecke, Florian #Meyer, Jan-Henrik #Roßmöller, Bernd

The BGE (Federal Service Company for Radioactive Waste Disposal) is a Peine-based organisation that has been entrusted with the task of converting the former Konrad iron ore mine to serve as a final repository for low- and intermediate-level radioactive waste. The BGE is currently engaged in renovation and reconstruction operations at the Konrad 1 shaft site. After the refurbishment work in the south compartment of the Konrad 1 shaft was completed in 2016 with the successful commissioning of the new manwinding system the renovation of the north compartment was able to commence the following year.

#GeoResources Journal #Download # Konrad mine repository #Nuclear waste disposal #Bundesgesellschaft für Endlagerung mbH (BGE) #Mining #abandoned mining #repository mining #shaft sinking #Conveyor technology

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