Mechanical properties of heat-treated rock after the cooling treatment directly influence the exploration and development of underground space and resources

storage of nuclear waste and stability evaluation of underground engineering after the high temperature disaster. Uniaxial compression and acoustic wave tests were conducted on heat-treated marble samples under the conditions of natural cooling and water cooling. Then

the variations of peak strength

elastic modulus

attenuation coefficient

longitudinal wave velocity and dominant frequency under different conditions were analyzed. A decrease trend is noted in peak strength

elastic modulus and longitudinal wave velocity of heat-treated marble by water cooling with the increase of treated temperature. When the temperature is lower than 400 ℃

the attenuation coefficient gradually increases and the dominant frequency gradually declines with the increase of temperature. When the temperature is higher than 400 ℃

the attenuation coefficient and dominant frequency do not completely exhibit monotonically increasing or decreasing trend

though there is a turning point. The peak strength

elastic modulus and dominant frequency of heat-treated marble samples after water cooling are lower than those after natural cooling

but the longitudinal wave velocity and attenuation coefficient are opposite. These results can provide references for the engineering health monitoring and stability evaluation of cooling methods on heat-treated rocks.