GeoResources Journal for Resources, Mining, Tunnelling, Geotechnics, Equipment and Energy
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23. December 2022
( 7519 Clicks / 3550 Downloads )
ISSN: Print 2364-8422 / Online 2364-8430
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.
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.
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.
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.
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.
On the autogenous Healing of Cracks in waterproof Concrete Structures – Experiences in the Field and Conclusions drawn
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.
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.
Tanzania hosts world-class graphite deposits and the Pula Group leads with a profitable and socially responsible model for exploration.
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’.
Practical Examples of Concrete Logistics in Shaft Sinking – a real Challenge for Transport and Handling Operations
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.
The Konrad Nuclear Waste Repository – Renovation and Reconstruction Work in the North Compartment of Shaft Konrad 1
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.
World’s longest Railway Tunnel Project – supported by innovative Conveyor Digitalisation and reliable Engineering
17. October 2022 (1648 Clicks)
The consortium BTC Brennero Tunnel Construction and the Hosch Group jointly delivered on a world-class tunnelling project by combining excellent engineering with the innovative remote monitoring system Hoschiris Discover.
01. November 2020 (10071 Clicks)
Das Buch 5 der Reihe „Dokumentation der technischen Entwicklung bei der RAG“ stellt die Entwicklungen der vergangenen fünf Jahrzehnte aus dem Bereich Grubensicherheit dar. Der zweite Band behandelt die Staubbekämpfung und die technischen Maßnahmen im Arbeitsschutz.
31.08.2023 (141 Clicks)
The State Government’s decision to pass legislation forcing mining comp...
28.08.2023 (121 Clicks)
Expro (NYSE: XPRO), a leading provider of energy services, today announced it...
01.09.2023 (117 Clicks)
Metso moves its headquarters to Matinkylä, Espoo, in September 2023, and...
30.08.2023 (115 Clicks)
Global engineering, procurement and construction giant Bechtel chooses Latin ...