Experimental Study on the Compression Behavior of Grouted Rock with Bi-Directional Penetrating Crack

Grouting is a common method of reinforcing fractured rock mass. The mechanical property grouted major aspect the reinforcement effect, which depends on geometry crack, angle (β) between load direction and other factors. Few studies have focused with bi-directional crack can reflect well grouting in stratum developed fractures. To explore effect mass, uniaxial compression tests were carried out samples different bidirectional widths (t) angles cracks. results showed that: (1) when β was 30°, failure mode sliding along interface grout, 45°, composite mode, 0°, 60°, or 90°, typical intact mode; (2) increased from 0° to compressive strength (UCS) decreased then again; (3) UCS had nothing do grout thickness, not greater ultimate energy storage capacity. test provide reference for construction design underground excavation process.