Physico-mechanical rock properties are typically investigated via laboratory tests using core
samples. However, sample coring is time consuming and expensive. The longitudinal wave …

The nondestructive testing of the bolt anchoring quality based on ultrasonic guided wave
technology is significant to ensure project security. In this paper, an improved Legendre …

Rock quality is a critical design parameter of rock bolts. However, rock weathering
deteriorates rock quality and adversely affects the performance of rock bolts. The objective of …

The damage of aircraft cables is a major issue in the aerospace industry, which usually
starts from insulation layer defect and can lead to serious casualties and financial losses. In …

Pull-out load and the cement-sand ratio (CSR) can affect the non-destructive testing (NDT)
results of anchor bolts. Therefore, in this article, NDT experiments were conducted on both …

A combined non-destructive guided ultrasonic wave measuring approach and low-
frequency ultrasonic tomography technique on cylindrical surfaces is developed to …

The stability of tunnels and rock slopes is adversely affected by defects in rock bolts. This
study investigates the suitability of the smart sensing method using electromagnetic waves …

The magnitude of prestress can reflect the degree of anchor bolt failure, but currently there
are relatively limited theoretical research methods for the wave characteristics of prestressed …

An analytical integration Legendre polynomial series approach (AILPSA) is proposed to
study guided waves in a resin bolt, which is a typical layered cylindrical structure. Compared …

The longitudinal wave velocity (v L) in a rock bolt is a useful parameter for evaluating the
conditions of the rock bolt and the surrounding rock mass. This study investigated the …