Proposed Methodology for Evaluating the Allowable Peak Particle Velocity Limit of Stabilized Rock Slopes with Rock Dowels Subject to Blasting Vibration

Abstract

Blasting-induced vibrations pose a safety concern regarding the stability of rock slopes, particularly in urban infrastructure projects where stringent peak particle velocity (PPV) limits are commonly enforced. These vibration limits, typically determined from empirical guidelines, may not reflect the actual resistance capacity of stabilized rock slopes with rock dowels. Such limitations on blasting operations, imposed through restrictions on the Maximum Instantaneous Charge (MIC) weight, can lead to increased construction time and costs. This paper presents a methodology supported by field data from a pilot project that enable the application of a higher PPV limit for stabilized rock slopes with rock dowels subject to blasting vibrations. Moreover, the site monitoring results demonstrated that stabilized rock slope could withstand blasting vibrations exceeding 25 mm/s. This work bridges the current divide between prescribed guidelines and actual field performance, enabling more cost-effective and efficient blasting operations while maintaining safety.