“…The values of q while approaching the failure load level reach the critical value of 1.42 (Vallianatos and Sammonds, 2013) designating clearly the inevitable upcoming fracture. Since this framework concerns non-extensivity, which is, in turn, related to (multi)fractality , it may be said that the behaviour of Tsallis parameters suggests a fractal picture for fractures' network that represents each loading cycle, as has been previously suggested not only in rock physics but in earth sciences too (Vallianatos and Triantis, 2012;Vallianatos and Triantis, 2013;Vallianatos and Sammonds, 2014;Michas et al, 2015). Moreover, each loading-unloading cycle contributes to the creation of a rich fractures' network and consequently the collection of AEs is expressed by a q-parameter which gets higher in each repeated loading-unloaded cycle (see Figure 9), approaching approximately 1.5 as the order of the sequential loading-unloading cycle increases, indicating that a q-exponential distribution is approached in the fracture's network as the loading-unloading cycle is repeated indicating a high degree of hierarchical Latin American Journal of Solids and Structures 13 (2016) 2283-2297 organization similar to that of faults in geodynamic systems fractality Michas et al, 2015).…”