Materiały konferencyjne SEP 2018

4. PODSUMOWANIE I WNIOSKI Analizując powyższe wyniki badań można stwierdzić, iż osiągnięto bardzo dobrą zgodność w obszarze identyfikacji jakości (długości) wklejenia, Wyniki dla przypadków o tej samej długości są powtarzalne, natomiast błędy dopasowania modeli, a w konsekwencji popraw- ność identyfikacji i oceny jakości wklejenia żerdzi kotwiowych w warunkach ruchowych akceptowalne. LITERATURA [1] Li Charlie C. 2010: Principles of rock bolting in high stress rock masses, Mining & Environment, Vol. 2/1, pp. 133-143, Central Mining Institute, Poland. [2] Tadollini S., C. 2010: Current roof bolting applications, technologies and theories in US mines, Mining & Environment, Vol. 2/1: 305-314, Central Mining Institute, Poland. [3] Staniek A. 2012: Identification of Discontinuities in Resin Layer of Grouted Rock Bolts, Experi- mental Techniques, Vol. 36, No. 2, USA. [4] Dossing O. 1988: Structural Testing, Part II: Modal analysis and Simulation, Bruel & Kjaer, Den- mark. [5] Ewins D.J. 2000: Modal Testing: theory, practice and application. Research Studies Press Ltd., Eng- land. [6] Maia, N.M.M., Silva, J.M.M. 1997: Theoretical and Experimental Modal Analysis, Research Stud- ies Press Ltd., England. [7] Uhl T. 1997: Computer Aided Identification of Mechanical Models, WNT, Poland. [8] Remington P. J. 1997: Encyclopedia of Acoustics, Vol. 2, Ch. 63, 71, pp. 715-734, 843-855, John Wiley & Sons, New York. [9] Beard M.D., Lowe M.J.S. 2003: Non-destructive testing of rock bolts using ultrasonic waves. Inter- national Journal of Rock Mechanics and Mining Sciences 40, pp. 527-536. [10] Kidybiński A., Nierobisz A., Masny W. 2005: Maintenance of an opening affected by tremor en- forced within nether roof strata, Proceedings of the Rockbursts 2005 Conference, 41-52, Central Mining Institute, Poland. ABSTRACT: In the following paper results of research realized in the corridor of the coal seam no 401 in the “Budryk” coal mine are presented. The aim of research was to measure the characteristic of a pull-out test and establish the maximum pull-out force. Investigated rock bolts at different lengths were installed in the upper roof section. Additionally the method for identification of discontinuity of grouted rock bolts was utilized. The results of both approach- es are compared and discussed.