We are pleased to present to you the current edition of the English Journal GeoResources.
A Word on ...
A presentation entitled ‘Never waste a good crisis’ and the current and all-consuming coronavirus outbreak have inspired to look at the opportunities that present themselves in times of crisis. By making sensible decisions, taking clear actions and finding new pathways we will be able to take advantage of future opportunities – for our society, our businesses and our private lives.
Working with high-pressure equipment on construction sites that operate modern air compressors presents a high risk of serious accidents. The article raises awareness to this particular hazard and provides advice on selecting suitable hose line systems and on their correct operation and handling at the workplace.
Self-drilling micropiles allow flexible use of drilling equipment, enable the installation of long micropiles even in confined spaces and obtain a high drilling performance with very low vibrations. This article presents an innovative high-performance self-drilling micropile with an internal load bearing capacity of approx. 6,500 kN. The further product development and experience gained from installation tests are explained. Furthermore, the efficiency of the use of a bored pile, a group of micropiles or and a single high-performance micropile is compared.
This article deals with the long-term behaviour of slope stabilisation projects using high-tensile wire mesh. Experience from three case studies from 2000 and 2005, which were visually inspected 11, 13 and 17 years after installation, and investigations of the corrosion-protective coating of the wires are used to estimate the service life.
The traditional ski resort of Glungezer is located near the Tyrolean capital Innsbruck in Austria, and artificial snowmaking is scheduled to be used for the first time here. The heart of the scheme is a storage pond sealed with geomembranes produced by AGRU Kunststofftechnik GmbH.
Since the 1970s in particular mechanised tunnelling technology has been increasing its share of the market at the expense of conventional tunnel engineering, a trend that has seen the development of ever larger tunnelling shields. The paper analyses some 274 individual projects in order to assess the impact of key machine parameters such as shield diameter, drive power, torque and rate of advance. It also traces the way in which these various parameters have developed over time.
The sustainable expansion of the Sydney Metro rail system is aimed at maintaining the quality of life in Australia’s biggest city and currently ranks as the country’s largest public transportation project. This article presents an overview of the scheme.
Doka supplies formwork engineering services, material and equipment for the mined tunnel concrete linings at the Sydney Metro project. It is the company’s largest-ever involvement in major tunnel engineering works.
The last German colliery has closed and orders from the German hard coal industry are now a thing of the past: but rather than complaining the mining supplier SMT Scharf is looking to the future – and is converting its diesel vehicles to electric for the global deep mining industry.
The paper describes three ongoing and/or recently completed shaft renovation projects undertaken in Germany by the specialist mining contractor Redpath Deilmann GmbH, Dortmund: the Konradsberg shaft in Heilbronn, the Zielitz 1 shaft in Magdeburg and the Neurode shaft in Heringen, Hessen.
The lignite mining areas of central Europe are increasingly encountering extraction zones that were previously worked by both opencast and underground mining methods, in some cases with significant mining losses. The paper uses the example of Amsdorf opencast mine to present the potential offered by 3D modelling of these areas, which are now attracting interest due to the high demand for natural resources.