Qingdao
China
Shandong University of Science and Technology
Damage factor, Gas-activated coal, Coal and gas protrusion, Coal strength
Double-joint, Direct shear test, JRC, Joint spacing, Cohesive zone model
Rock joints, Cyclic loading, Shear properties, Numerical simulation, Constant Normal Stiffness
Pillar-backfill composite, Low-frequency disturbance, Acoustic Emission, digital image correlation, failure mode