Experimental study on the inhibitory effect of bolting position on crack propagation in cavity-containing sandstone.

ABSTRACT: This study systematically investigated the effects of seven bolt anchorage positions on the mechanical behavior and failure of single-hole sandstone specimens using uniaxial compression tests and PFC2D simulations, with emphasis on crack-propagation suppression. The results showed that: (1) Anchorage position strongly influenced the stress-strain response, mechanical parameters, crack initiation, and final failure morphology. When the bolt passed through the cavity center (1#) or was tangent to the cavity crown (2#), both strength and stiffness decreased, the pre-peak response showed multiple stress drops, and post-peak failure remained brittle. By contrast, anchoring 12-18 mm from the cavity center (3#-4#) increased strength and E, and the post-peak response shifted from brittle to more d

SUBMITTER: Zhu D 

PROVIDER: S-EPMC12948095 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature