Dissolution of reef limestone have a significant impact on the stability of ocean engineering and island reef engineering, Cavernous dissolution is a common dissolution method for reef limestone. By constructing a discrete element model of random dissolved holes, the meso-deformation and failure characteristics of cave-type dissolved reef limestone are simulated, and its deformation and failure laws and fracture evolution characteristics are analyzed. The results show that the discrete element model of dissolving reef limestone based on stochastic clustering algorithm can well simulate the pore-type dissolution, and its deformation and failure characteristics have obvious rules; with the increase of the dissolution rate, the dissolution reef limestone uniaxial The stress-strain curve gradually changed from unimodal to bimodal or multimodal, and the failure characteristics gradually changed from brittle to plastic. With the increase of the dissolution rate, the uniaxial compressive strength and elastic modulus of reef limestone gradually increased. It decreases, the compressive strength decreases exponentially, the elastic modulus decreases linearly, and the Poisson's ratio increases first and then decreases, indicating that the sample mainly undergoes structural damage at a high corrosion rate; as the corrosion rate increases The macro fracture surface of the reef limestone gradually disappeared. Due to the interaction of dissolving pores, the cracks originating around the pores began to sprout and gradually penetrated, eventually leading to the overall macroscopic destruction of the sample. The results of this research can provide a theoretical reference for the in-depth understanding of the deformation and failure characteristics of dissolved limestone in marine engineering and island reef engineering. |