Fachartikel_02_2017

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The plan was to extract three coal faces in the Zollverein 1/2 twin seam in the Prosper North district at Prosper-Haniel colliery of RAG Aktiengesellschaft, Herne/Germany. A new safety concept was specially developed for this operation and its essential features would then be adopted for use in the subsequent production faces in Zollverein 1/2 seam. Coping with the high desorbable ...

An operation as economically advantageous as possible by guaranteeing occupational safety in the underground is of great importance in the field of mining. Furthermore, safe working conditions should be provided until the end of the subsidized hard coal mining in Germany at the end of 2018. Pre-drainage of methane, an application of which the gas content of a coal seam ...

Longwall mining is an expensive undertaking – from the preparation of the site to capital investment in the equipment. That is why longwall owners have high performance expectations, especially in tough economic times when commodity prices are low. One of the ways longwall mines achieve or exceed their owners’ expectations is through the use of high efficient Longwall Top Coal ...

One of the basic problems of Polish underground mining is low seams extraction. The main impediment in this case are extremely harsh exploitation and operation conditions of long-wall complex machines, which in most cases result from mining conditions and the characteristics of powered hydraulic roof supports. According to this, in the Department of Mining, Dressing and Transport Machines at the ...

In the harsh conditions of raw materials extraction underground, people and machines alike are pushed to their absolute limits. Every single component matters. If just one of the “cogs” fails in a mining operation, the cost of repair and reinstatement is many times that in other branches of industry or production. One of those cogs is the cable required for ...

The MINING Division of HAZEMAG & EPR GmbH, Dülmen/Germany, which is one of the partners in the SK Mining Alliance, specialises in client-specific machines for drill and blast drivage operations in the mining and tunnelling industries. These system solutions are employed for drivage and rebuilding of roadways and as well as using suitable machine technology are also designed to help ...

The market for machines and equipment in underground mining will experience significant growth in the coming years. Siemens AG in Nuremberg/Germany has spent years cultivating long-term and successful business relationships with a number of major vehicle manufacturers in the field of mobile mining technology. These relationships are the foundation for expansion of the company´s portfolio to include diesel-electrical drive systems ...

The influence of underground openings due to mining activities on ground subsidence and sinkholes can be minimized by the use of backfill material. Mechanical properties of the backfill material, e. g. material stiffness, are depending on the pressure, and if binders are used, are also developing with time. Numerical simulations are an efficient tool to help estimating the influence of the ...

China, the world’s largest coal market, is also showing signs of increasing sensitivity in the face of environmental and social issues. The Chinese Government has reacted to this and the coal industry – which admittedly is also suffering from over-capacity and a high level of debt – has as a result been obliged to adopt with a wide range of ...