<p>In engineering practice, broken rocks are typically reinforced by grouting. After slurry grouting, the strength of broken rocks is enhanced due to the interaction with the slurry cementation body. Thus, the reinforcement effect and failure characteristics will be influenced by different slurries. In this research, the consolidated bodies formed by artificially broken sandstone particles of natural grading with ordinary Portland cement of strength grade 32.5 MPa, rapid hardening sulphoaluminate cement of strength grades 42.5 MPa and 52.5 MPa, and modified epoxy resin were employed to experimentally investigate the influences of different slurries on the static mechanical properties and failure mode of the broken rock consolidated bodies. Subsequently, a theoretical micromechanical model and a numerical calculation model regarding the failure of broken rock consolidated bodies were established. The results indicated that when the strength of aggregate particles was greater than that of the slurry cementation body, the strength of the consolidated body formed by grouting slurry with sandstone particles was mainly affected by the bonding force at the slurry-particle interface. The failure mode of the consolidated body formed by the grouting slurry was brittle failure with a small strain. The post-peak strength declined rapidly, and the ultimate strength and acoustic emission ringing count were higher than those of the consolidated body formed by the modified epoxy resin. The consolidated body formed by the modified epoxy resin exhibited evident plastic characteristics upon failure, accompanied by a large strain and a decelerated change in the post-peak strength. The research results are highly significant for understanding the failure mechanism of the consolidated body of fractured rock mass and can provide a basis for the selection of grouting fluid and the development of new grouting fluid.</p>