## 1 Introduction  
There are a large number of defects, such as fracture surfaces, joints, and faults, within rock bodies, and natural cracks and pore defects contribute to the discontinuous, nonuniform, anisotropic, and inelastic characteristics of real rock material and structure [1]. The existence of these discontinuous structural surfaces as well as the extensive development of fissures seriously affect the integrality and stability of the rock body. Grouting reinforcement technology has been widely used in various fields of geotechnical engineering and can significantly improve the structure and mechanical properties of fissure-containing rock bodies. It has remarkable reinforcement effects on fissure-containing rock bodies and is one of the most effective ways to improve rock body strength and stability. In recent years, scholars have proposed a variety of test programs and conducted a series of grouting test studies.  
Based on the theory of damage mechanics, [PERSON] et al. studied the variation rules of dynamic elastic moduli and damage variables before and after the grouting of a rock body [2]. [PERSON] et al. proposed a new method of normal cleavage to produce fractured rock specimens, and the artificial specimens exhibited good geometrical similarity with the original rock fracture [3]. [PERSON] et al. investigated the mechanical properties of red sandstone specimens before and after reinforcement by employing static uniaxial compression and falling hammer cyclic impact loading tests [4]. [PERSON] et al. analyzed the mechanical properties of a grouted mass by conducting uniaxial and triaxial compression tests on the grouted mass with different fracture geometries [5]. [PERSON] et al. carried out nuclear magnetic resonance and shear tests on grouted solidified bodies with different grouting materials and different numbers of freeze-thaw cycles, revealing the microscopic pore evolution law and shear mechanical characteristics of the grouted fractured rock body [6].  
In terms of grouting material selection, [PERSON] et al. used cement slurry and Marithan N to reinforce broken specimens and studied the mechanical properties of the grout reinforcement specimens [7]. [PERSON] et al. prepared a new type of grouting material by using sulfo-aluminate cement as the base material, adding polyurethane and admixture, and verified its applicability through engineering applications [8]. [PERSON] et al. investigated the strength characteristics and damage mode of fissure specimens before and after filling with high-permeability modified epoxy resin [9]. [PERSON] et al. used ultra-fine cement and epoxy resin as grouting materials to reinforce cracked specimens, and analyzed the reinforcement and damage mechanisms of the grouting materials on the fractured surfaces of the specimens by employing uniaxial and triaxial loading tests combined with scanning electron microscopy [10].  
Through reviewing the relevant literature, it was found that although scholars have conducted various research on the grouting theory, grouting materials, and grouting methods when evaluating the effect of grouting, more attention has been paid to the elastic modulus, compressive strength, and other mechanical properties of the specimen before and after grouting reinforcement, and there is still a lack of research on the damage and destruction of grouted specimens in the compression process. In view of this deficiency, this study utilizes ultra-fine cement slurry, cement-silicate slurry, and MARITHAN(r) for grouting reinforcement tests on rock-like specimens subjected to uniaxial compression rupture. With the help of a uniaxial compression acoustic emission test system, the influence of different grouting materials on the mechanical properties of grouted specimens is investigated, and the damage to grouted specimens during the uniaxial compression test is monitored and analyzed using acoustic emission signals, aiming to provide a theoretical basis for the construction of underground projects in fissured rock bodies.