http://kyt2024.vtt.fi/rakoseminaari2024/Paula_Salminen.pdf Nettet1. feb. 2024 · The effects of rock stress, number of joints and joint alteration on rock load are only considered in NGI-Q system. Weatherability of rock masses in CMRI-RMR system is very sensitive. Above 97% SDI (slack durability index or slaking index), the rock load drastically decreases, ...
Geological Strength Index - an overview ScienceDirect Topics
NettetAs for the joint roughness number, the joint alteration number should be measured along the most unfavorable discontinuity. Figure 3.9. A joint rosette with four joint sets … Nettet9. sep. 2024 · R2 + R3 represents the degree of jointing, and R4 represents the bonding degree of the main discontinuities. Their sum, R2 + R3 + R4, defined as R(2+3+4) for the sake of simplicity, characterizes the rock structure/integrity index of the system and ranges from 8 to 70. Therefore, it is possible to establish the relationship between KV and … scroll behavior mdn
Short on the Q-system - RockMass
NettetJa (Joint Alteration Number), che dipende dal grado di alterazione delle fratture, dallo spessore e dalla natura del riempimento, e che viene ugualmente determinato sulla famiglia più sfavorevole; Jw (Joint Water Number), che dipende dalle condizioni idrogeologiche. Parametri della classificazione di Singh e Goel Nettet6. des. 2024 · Joint set number (J n), joint roughness number (J r), joint alteration number (J a) J N refers to the number of joints in a unit volume of rock mass, which is used to calculate the joint density of the rock mass, and is obtained from a large number of on-site measurements and statistics on the selected joint surface. Nettet4.5 Joint roughness number (J r) ..... 18 4.5.1 r in Jrelation to joint infill ..... 18 4.5.2 r in Jrelation to joint planarity ..... 19 4.5.3 r in Jrelation to joint ... 4.6 Joint alteration number (Ja) ... pccert.7sys.local/certsrv