Rock mass fracturing in main gate roof behind advancing longwall face

0430258 - ÚGN 2015 RIV CZ eng A - Abstract
Waclawik, Petr - Ptáček, Jiří - Vavro, Martin - Koníček, Petr - Kukutsch, Radovan
Rock mass fracturing in main gate roof behind advancing longwall face.
5th International Colloquium on Geomechanics and Geophysics. GECO 2014. Vol. 5. Ostrava: Ústav geoniky AV ČR, 2014 - (Koníček, P.; Souček, K.; Heroldová, N.). s. 45-46. ISBN 978-80-86407-49-4.
[5th International Colloquium on Geomechanics and Geophysics. 24.06.2014-27.06.2014, Ostravice, Karolínka]
Institutional support: RVO:68145535
Keywords : main gate * longwall exploatation * RQD testing * rock mass fracturing * fracturing zone prediction
Subject RIV: DH - Mining, incl. Coal Mining

To increase the stability of roadways, high cable bolts and short steel beams are increasingly used nowadays, which should lead higher stability of the supporting steel arches during both driving of roadways and primarily during mining of longwall panels in the Czech part of the Upper Silesian Coal Basin. This high anchoring is also obtained by the substitution of middle hydraulic props used to stabilize steel arches support ahead of the advancing longwall. If the roadways are re-used, high cable bolts are used to subsequently stabilize a support frame construction behind the advancing longwall. Anchoring in a high non-fracturing rock mass of a roadway roof is necessary for the effective function of these cable bolts.
Permanent Link: http://hdl.handle.net/11104/0235183