Dismantling (mining)

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As deconstruction is known in mining the shape of the mining leadership , in which the reduction is run by the border of the respective height back to the beginning of the construction field. In Austria, dismantling is also known as home construction.

Requirement, implementation and use

A height in dismantling dismantle , all the necessary advance degradation routes have been created to the degradation limit. Subsequently, the respective construction height can then be dismantled. During dismantling, the flow rate and the waste stream flow concurrently with the dismantling, but reversing. The dismantling is used in mining processes with long front-like construction such as B. the longwall . However, the dismantling can also be carried out in the stem . In the case of pillar-like processes, guidance is only possible during dismantling. In the case of the chamber-like and the shock-like construction, the pure dismantling is not feasible, only the united front and rear dismantling.

Limits of applicability

The limits for dismantling lie primarily in the geological formation of the respective deposit . The thickness of the usable minerals plays a major role here. Particularly in the case of seam-like deposits, the dismantling of deposits in which the thickness of the seam is at the limit of building worthiness needs to be reconsidered. The large amount of mountains in particular plays a decisive role here, as they have to be conveyed away and thus additionally burden the conveyance. But the nature of the host rock also affects the applicability. Slate is problematic in the lying area , as it has a strong tendency to swell. This may be necessary, the sole area frequently durchzusenken . In the case of hard coal seams, the outgassing of methane can lead to difficulties if the face is being dismantled. Ultimately, the layout of the construction site also sets limits to dismantling.

Advantages and disadvantages

A major advantage of dismantling are the mostly lower costs of the respective mining routes. The reason for this lies in the area of route funding . Due to the fact that must be taken no account of the delivery processes in the mining area, the promotion is only available for the tunneling available. In addition, the tunneling can be fully mechanized. Another advantage of the dismantling is that by driving up the tracks, the mining field can be explored before the start of the dismantling. In addition, once the mining sections have been completed, mining cannot be slowed down by driving. The dismantling in coal mining has a disadvantageous effect on methane gas extraction. Especially when the two mining stretches are dropped after the longwall has passed through . The gas suction then has little chance of success. Ultimately, the dismantling is very dependent on the geological conditions. The dismantling is a disadvantage, especially in the case of heavily swelling recumbents, due to the increased work involved in lowering.

Individual evidence

  1. ^ A b Tilo Cramm, Joachim Huske: Miners' language in the Ruhr area. 5th, revised and redesigned edition. Regio-Verlag, Werne 2002, ISBN 3-929158-14-0 .
  2. ^ A b c d e Carl Hellmut Fritzsche: Textbook of mining science. Second volume, 10th edition. Springer Verlag, Berlin / Göttingen / Heidelberg 1962.
  3. ^ A b Ernst-Ulrich Reuther: Textbook of mining science. First volume, 12th edition. VGE Verlag, Essen 2010, ISBN 978-3-86797-076-1 .
  4. ^ Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining dictionary. 7th edition. Glückauf Verlag, Essen 1988, ISBN 3-7739-0501-7 .
  5. ^ Heinrich Otto Buja: Engineering handbook mining technology, deposits and extraction technology. 1st edition. Beuth Verlag, Berlin / Vienna / Zurich 2013, ISBN 978-3-410-22618-5 .