National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
New trends in innovation of friction rock-bolts for mining conditions
Paloncy, L. ; Hanzlik, Č. ; Souček, Kamil ; Šňupárek, Richard
Combined friction and grouting bolts (hydraulic expanded) for using in coal seam are described. Results of experimental pull-out tests of two types of friction and grouting bolts of different length in a thick coal seam are presented. The results confirm high values of anchoring of the friction bolts in coal seam.
Results of CMA Project no.34/2003 "Measures toward enhancing the resistance of working face headings and gateways against rock burst induced deformation".
Šňupárek, Richard ; Staš, Lubomír ; Souček, Kamil ; Zeman, Vladislav ; Horyl, P. ; Janas, P.
The work was focused on reinforcing of steel roadway support (reinforcing of particular arches and reinforcing of whole support facility) and measures for strenghtening and change of physical-mechanical properties of rocks and coal in the vicinity of gateroad which increase dynamic resistance of support.

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