Abstract: The underground support structure is frequently subjected to harsh conditions including high temperature,high humidity,and chemical erosion,which lead to recurrent corrosion failures and pose a significant threat to the stability of roadway surrounding rock. To investigate the damage evolution law of mine pipe-seam anchor bolts in corrosive environments,indoor salt-spray accelerated corrosion tests and mechanical property tests were conducted to examine the effects of different temperatures(30,35,40 ℃) and p H values(3,4,5) on the corrosion damage of the bolts,with particular focus on the apparent corrosion characteristics,mass loss rate,corrosion rate,and fracture load loss. The test results show that:(1) Both the corrosion rate and the degree of mechanical property degradation decrease gradually with increasing p H value. The corrosion rate and fracture load loss rate at p H= 3 are 1. 24 times and 2. 5 times those at p H= 5,respectively.(2) The influence of temperature on the mass loss rate and fracture load loss rate is not consistent:the mass loss rate increases monotonically with rising temperature,whereas the fracture load loss is most severe at 35 ℃.(3) At p H= 3,the effects of 30 ℃ and 40 ℃ on the mechanical properties are not notably different,and 35 ℃ results in only 1. 3 times the fracture load loss of the other two temperatures;thus,the acidic environment is the dominant factor controlling corrosion. However,as the acidity weakens,the effect of temperature variation on fracture load loss becomes more pronounced.