Fachartikel 04_2018

Underground stowing material has to meet all kinds of divergent requirements. From an economic viewpoint the overall costs should be kept as low as possible, while from a stowing point of view the material as a load-bearing element often has to satisfy very high standards. Moreover, the preference is generally to use discard from the colliery itself, as this will ...

According to the classic approach, fissure or pore systems in solid rock or backfill are to be injected with particle-laden, and thereafter particle-free material when a high level of impermeability is required. The suspensions used in the salt and potash mining industries are usually in the form of magnesia binders. Waterglass is also frequently employed as a particle-free injection medium ...

More and more mines are using double piston pumps for conveying pastes, cakes and slurries. Stiff pastes are normally used for the stabilization of underground workings. Cement and ash are added to create a construction material with sufficient strength. For tailings and ore transportation above ground, slurries are produced and transported over long distances to deposits or preparation plants. In ...

In the Donskoy Mine GOK in Chromtau/Kazakhstan, the TOO Schachtbau Kasachstan, a joint subsidiary of the German companies Schachtbau Nordhausen GmbH and Thyssen Schachtbau GmbH is driving a roadway in tricky geology with a small cross-section by means of New Austrian Tunnelling Method (NATM). Apart from the application of suitable engineering, the innovative shotcrete with polymer fibre reinforcement and consistent ...

A key indicator regarding the efficiency of formwork systems is their suitability for special applications. More specifically, the cost-effectiveness depends largely on how much the work processes differentiate for different applications and how high the ratio of special components is relative to the standard components of the system. In this context, PERI GmbH, Weissenhorn/Germany, has developed the VARIOKIT, an engineering ...

The RAG-managed Prosper-Haniel colliery in Bottrop/Germany, has some very impressive equipment operating on its high-performance coal faces 1,200 m below ground. These underground workings, where miners have been busy digging out the coal, have been the scene of some rapid technological developments over the last five decades. 50 years ago the only way to find out what was going on ...

The Ibbenbüren mine produces coal under the special conditions of large depth and low-thickness seams with high methane content with the risk of gas and gas/coal outbreaks. In this essay the path to a modern, high-performance mine under these conditions is described. Special emphasis is given on the roof support and plowing technology (Gleithobel) in view of the development up ...

Industry 4.0 is now being introduced into the mining sector in an attempt to save valuable time and money. This helps speed up the workflow and improve safety standards at mines. The following paper discusses the progress to be made in this area and what is already possible today. Industry 4.0 in the mining sector: inventory of developments While Industry ...

Truffer AG, Vals/Switzerland, is a company extracting Vals Quartzite in its own quarry. The material is further processed in Truffer’s factory located in Vals. Founded in 1983, Truffer is now one of the leading stone processing companies in Switzerland. The firm employs 60 workers and fabricates a wide range of natural stone products, which are used for projects around the ...

More than a century after their invention, belt conveyors remain a key element in delivering bulk material to the process and production of products and material that feed the worlds burgeoning economies. The technology has evolved significantly throughout the 20th century and continues developing to keep pace with the demands of the 21st century. Today’s belt conveyor systems are capable ...