Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Table 1

Statistics of rock sample parameters.

Serial number	Feature	Average angle	Amount
USN	None	None	4
USH	Horizontal	2.5°	8
USO	Oblique	45.0°	8
USV	Vertical	87.0°	8