Evaluation of the effect of vibrational wave propagation of different artificial discontinuous planes in rock samples

Abstract

Vibrational waves can progress far away from their sources. Therefore, such waves have the capacity to cause damage to human environments. Such waves originating from mining activities (especially rock blasting) should be studied to understand their propagation mechanism in fractured rock masses. To determine how the vibrational shock wave is distributed in fractured rock masses, laboratory tests were performed. Rock samples with different discontinuity geometry combinations were tested by applying exactly the same vibrational shock to the test samples. The cumulative effects of exposure to vibrational shock waves and the propagation of waves at discontinuities in the rock samples were observed from the other end of the sample using vibration seismographs. The measured data indicated which rock mass properties have the most effect on wave propagation. In this study, different discontinuity systems were used in the rock specimens. These discontinuity systems were referred to as the groups 1, 2, 3 and 4 models. Based on the results of the vibration tests, each group was determined to have behaved differently in terms of wave propagation.

Stress wave propagation and incompatible deformation mechanisms in rock discontinuity interfaces in deep‐buried tunnels

“…The overall dynamic performance is mainly determined by large-scale weak structural planes (Gong et al, 2021;Li et al, 2017Li et al, , 2020Moon et al, 2001;Peng & Zhu, 2012). The vibrational characteristics of rock masses can be also the result of the superposition of forced vibrations caused by excited seismic waves and free vibrations (Kekeç et al, 2015;Li et al, 2018). As a typical geological structure, fault fracture zones often display geological characteristics such as rock fragmentation, complex and changeable geological conditions, and strong tectonic movements (Bamford et al, 2021;Li et al, 2016;Sun et al, 2013).…”

Propagation Characteristics of Surface and in-Depth Vibrations in Sand Grounds: A Comparative Analysis

“…The remaining energy spreads from the blastholes to the surrounding rock mass, structures and environment (Shi et al, 2016) translating into adverse effects such as ground vibration, airblast, flyrock, noise, backbreaks and overbreaks ( Monjezi et al, 2011;Singh and Singh, 2005;Singh, 2004). Long considered as the most hazardous impact generated by blasting activities (Kekeç et al, 2015;Monjezi et al, 2010), blast-induced ground vibration (BIGV) has always been a major concern to planners and environmentalists (Nateghi, 2012) especially that an increasingly higher number of quarries and mines operate nowadays nearby urban areas (Ainalis et al, 2017). In fact, BIGV has a detrimental effect on adjacent and remote structures (Nateghi, 2011) such as buildings, dams, roads, railways, natural slopes, mine slopes and underground activities conducted in close proximity (Singh and Singh, 2005;Singh, 2004;Monjezi et al, 2010;Shi et al, 2016).…”