Damage Mechanism of Prefabricated Fracture-Grouted Rock Specimens under the Action of Dry and Wet Cycles

In order to study the damage mechanism of fissure-grouted rocks in abandoned mine pumped storage, uniaxial compression tests were conducted using rock specimens after dry and wet cycles. Additionally, acoustic emission sensors used track specimens. The results demonstrate a negative correlation between peak strength elastic modulus linear decrease wave velocity mechanical characteristics fracture-grouted with increasing As number cycles increased, deterioration significantly decreased, internal microstructural adjustment gradually leveled off. A constitutive model considering due dry–wet cycle is introduced, stress–strain curves under different are fitted. model, which also accurately shows prefabricated cycles, better characterizes development law influence