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STEPPING BEAM SUPPORTS TYPE GEROM-GP 250/1200 AT THE FACECOALS WITH SUBMINATION OF THE COAL BANKS FROM THE COAL BASIN IN JIU VALLEY - ROMANIA

AUTHOR/S: SERAFINCEANU, A., MELCZER, M. C., SOARE, A., GEROM,. INVEST S.A.,
Sunday 1 August 2010 by Libadmin2006

6th International Scientific Conference - SGEM2006, www.sgem.org, SGEM2006 Conference Proceedings/ ISBN: 954-918181-2, June 12-16, 2006, Vol. 1, 233-238 pp

ABSTRACT

The method for exploiting the coal layers by using the crazing and submitting the roofs of the mining works from the underground is an alternative applied on large scale into the brown coal mines from the main coal basin Jiu Valley situated into the S-W of Romania.
The technology of individual supporting – by using the open circulation hydraulic props together with the linked metallic bars with blocking bolts and wedges, assume some great physical efforts and the factor of working security is not totally assured.
The authors proposed themselves to implement a new product capable to eliminate the disadvantages mentioned above and to assure an important increasing of the quantity of the extracted energetic coal.
In this context, it had been made the product called stepping bar type GEROM-GP 250/1200 whose functional model had been successfully tested into the tests stand of the GEROM – S. A. in Petrosani ( the most important producer of mining equipments in Romania) – and which it is now under experimenting in the underground at one of the subunits of National Coal Company in Romania – located in Petrosani town from the Jiu Valley mining basin.

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