###### Abstract  
The seepage characteristics during the complete stress-strain process of limestone under high water pressure were simulated via an experimental study of limestone post-peak penetrating behavior, and an approach to predict the formation of the seepage channel, namely, acoustic emission positioning technology, is proposed. The results showed that (1) whether in the experiment or in the numerical simulation, the sudden drop in the stress-strain curve after peaking indicated the full formation of shear fractures and seepage paths. (2) By using acoustic emission positioning technology in the simulation, the entire stress-strain process of limestone, from microfracture initiation and compaction to transfusion, could be monitored to observe the dynamic and real-time development of the microfractures. (3) The combination of acoustic emission technology with seepage monitoring revealed the real-time location and growth direction of micro ruptures and predicted the depth of penetration. The developed approach can improve forecast accuracy for landslides involving a low-permeability rock mass with cracks. In this study, limestone post-peak seepage characteristics were analyzed, and a method to forecast the formation of rock seepage paths before transfixion is provided. This work could provide a reference and guiding elements for ensuring the safety of slopes with high internal water pressure. f 2022 202201  
characteristics on the seepage law of fractures, the applicable conditions and correction of the seepage cubic theorem, and the change in the seepage characteristics and seepage law of fractures under deformation or load conditions [3; 4; 5; 6]. Studies on the seepage characteristics and seepage movement of fractured rock mass have mainly adopted equivalent continuum, discrete network, and mixed models [7; 8; 9; 10; 11; 12]. Many scholars [13; 14; 15; 12] studied the evolution of the permeability characteristics of rock blocks in the process of deformation and progressive failure, and their results revealed a strong permeability scale effect. However, due to the complexity of rock structures and the differences in physical experimental conditions and environments, the test results are not generalizable and thus are limited. Effective geophysical research methods must be developed to study the influence of slope rock mass damage and fracture on rock mass permeability in the process of rock mass excavation and loading [16]. Rock permeability has two components [17]. One is the permeability of the primary pores and cracks in rocks, and the other is the permeability change caused by rock failure. Experimental and numerical research on the permeability of primary pores and cracks in rocks is extensive, but studies on the entire process of permeability change caused by rock failure are relatively scarce. [PERSON] [13] conducted many sandstone total stress-strain-permeability experiments and obtained the rock permeability-strain relationship equation. This article mainly studied the influence of the stress level on rock permeability and the permeability-strain equation of rock. It studied the permeability characteristics of fractured limestone under high osmotic pressure (>1 MPa). A method combining acoustic emission location with seepage measurement was proposed to determine the formation of seepage channel. [PERSON] et al. [18] studied the relationship between rock permeability and damage evolution (fracture) from the perspective of seepage-stress-damage coupling by using a numerical method. Although these studies deepened our understanding of the effect of rock fracture on rock permeability, most of them focused on rocks with good permeability (e.g., sandstone), whereas minimal attention has been devoted to rocks with low permeability [19] (e.g., limestone and granite). Rocks with low permeability are difficult to observe at the initial stage of loading. Only when a rock is cracked under a load and broken through will permeability increase sharply, which is extremely unfavorable to the stability of the slope.