###### Abstract  
In order to study the damage mechanism of fissure-grounded rocks in abandoned mine pumped storage, uniaxial compression tests were conducted using fissure-grounded rock specimens after dry and wet cycles. Additionally, acoustic emission sensors were used to track the damage of the rock specimens. The results demonstrate a negative correlation between peak strength and elastic modulus and a linear decrease in wave velocity and the mechanical characteristics of the fracture-grounded rock specimens with increasing dry and wet cycles. As the number of dry and wet cycles increased, the deterioration of the fracture-grounded specimens significantly decreased, and the internal microstructural adjustment of the specimens gradually leveled off. A rock constitutive model considering deterioration due to the dry-wet cycle is introduced, and the stress-strain curves under different dry and wet cycles are fitted. The model, which also accurately shows the mechanism of damage to prefabricated fissure-grounded rock specimens after dry and wet cycles, better characterizes the damage development law of prefabricated fissure-grounded rock specimens under the influence of dry and wet cycles.  
dry and wet cycles; fracture grouted; surrounding rock damage; damage model +
Footnote †: journal: Medical  
shale increased in complexity after water-rock action. [PERSON]. [21] and [PERSON] et al. [22] carried out indoor experiments on samples under the action of different wetting-drying cycles and analyzed the effect of a changing number of wetting-drying cycles on the stress-strain relationship of samples. [PERSON], [PERSON] [23] used nitrogen and distilled water as pore fluid to conduct an effective pressure cycling test at room temperature and measured the intrinsic permeability of rocks. [PERSON] et al. [24] analyzed the changes in rock fine structure by scanning electron microscopy (SEM) to study the fine damage to rocks caused by intrusion of water cycles. In a previous study on fractured rocks [25], it was found that using real rock specimens containing fractures for grouting reinforcement may result in the grouting effect being affected by a variety of factors; this is due to the fact that the damage form of each rock specimen is generally similar, the fracture morphology cannot be accurately controlled. Therefore, this experiment used rock specimens for prefabricated fixed morphological fractures.  
In conclusion, specimens of muddy sandstone, used to create the prefabricated fractures, were chosen for the investigation. The fracture specimens were strengthened by grouting, put through several water-immersion test cycles, and then had their mechanical properties tested on rock samples to see how different control groups fared. The aim of this study was to investigate the degradation law of the mechanical properties of specimens of fracture-grouted rock under the influence of water and to expose the deterioration process of such specimens. The findings could serve as a guide for assessing the stability of pumped storage underground reservoir systems in mines and for researching how surrounding rock grouting and underground water infiltration are deteriorating.