To investigate the influence of intersection structures on the mechanical properties and failure mechanisms of rock materials. a series of uniaxial compression tests on complete red sandstone specimens and specimens with various hole shapes (T-shape. cross-shape. and shaft-roadway-shape) were conducted by the Instron 1346 servo-controlled rock mechanics testing machine. https://www.roneverhart.com/Peavey-KB-1-20-Watt-1x8-Keyboard-Amplifier-p27006/