Materiały konferencyjne SEP 2018

XXVII SCHOOL OF UNDERGROUNDMINING 2018 , Cracow, Poland Strength Core recovery Distance of discontinuity Character of discontinuity Wattering Discontinuity orientation GEOMECHANICAL EVALUATION (RMR COEFFICIENT) Borehole ČSM 1432/14 Evaluated depth interval: 0,00 m - 10,4 m tj. 0 - 10,4 m above seam No. 30 Layer No. Lithological type Depth from [m] Depth end [m] Layer thickness [m] Average UCS [MPa] 1. SILTSTONE 0,00 5,20 5,20 72,5 2. SANDSTONE 5,20 10,40 5,20 90,0 weighted average UCS [Mpa] in interval , 0 - 10,4 m 81,6 weighted average UCS [Mpa] reduced by layering coefficient ß in interval 0 - 10,4 m 77,5 number of core piecies in interval 0 - 10,4 m 109 average length of core [cm] in interval 0 - 10,4 m 10,0 Index RQD in interval 0 - 10,4 m 68 RMR 1. 2. 3. 4. 5. 6. TOTAL 7 13 8 25 15 0 68