A novel grouting simulation experimental system was developed to reproduce the grouting process under true triaxial stress in deep rock engineering projects. The device consists of a true triaxial loading system, a servo-controlled grouting system, and a comprehensive monitoring system. The following key technical issues were addressed in the design and development process: a. The true triaxial loading system was designed and included excavation windows, monitoring windows, and grouting channels, which can simulate the whole grouting process under true triaxial stress in deep rock engineering projects after connecting with the grouting system. b. The output parameters of the grouting system were servo-controlled with high precision, and the parameters were used to simulate the whole grouting process with variable pressure, flow rate, and pulse pressure. c. The comprehensive monitoring system enabled signal monitoring of the whole grouting process in the fracture from slurry diffusion to fill-up to fracture splitting. The results of the calibration test confirmed the reliability of the apparatus. Finally, under the background of a grouting project in the Jinchuan mine, China, a simulation test of the whole grouting process was carried out to obtain the morphology of slurry diffusion and critical splitting pressures in a single sealed fracture under various true triaxial stress states. This device can act as a new tool for the design of grouting parameters in deep engineering projects.Highlights<OrderedList> <ListItem> <ItemNumber>1.</ItemNumber> <ItemContent> A novel true-triaxial large experimental system for simulating grouting was established to reproduce the grouting process in deep rock engineering projects. </ItemContent> </ListItem> <ListItem> <ItemNumber>2.</ItemNumber> <ItemContent> The simulation test of the whole grouting process from slurry diffusion and fill-up to splitting a single sealed fracture under true triaxial stress was carried out for the first time. </ItemContent> </ListItem> <ListItem> <ItemNumber>3.</ItemNumber> <ItemContent> The simulation test revealed the morphology of the slurry during diffusion in the rough fracture, and the critical grouting pressures during splitting were obtained under different stress states. </ItemContent> </ListItem> </OrderedList>

Development of a Novel Experimental System for Simulating the Whole Grouting Process of Diffusion–Filling–Splitting in Deep Rock Engineering

期刊论文
发表日期：

2026年1月7日

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Xia-Ting Feng,
Xi-Fan Li,
Yang-Yi Zhou,
Cheng-Xiang Yang,
Tian-Xiang Song

摘要

A novel grouting simulation experimental system was developed to reproduce the grouting process under true triaxial stress in deep rock engineering projects. The device consists of a true triaxial loading system, a servo-controlled grouting system, and a comprehensive monitoring system. The following key technical issues were addressed in the design and development process: a. The true triaxial loading system was designed and included excavation windows, monitoring windows, and grouting channels, which can simulate the whole grouting process under true triaxial stress in deep rock engineering projects after connecting with the grouting system. b. The output parameters of the grouting system were servo-controlled with high precision, and the parameters were used to simulate the whole grouting process with variable pressure, flow rate, and pulse pressure. c. The comprehensive monitoring system enabled signal monitoring of the whole grouting process in the fracture from slurry diffusion to fill-up to fracture splitting. The results of the calibration test confirmed the reliability of the apparatus. Finally, under the background of a grouting project in the Jinchuan mine, China, a simulation test of the whole grouting process was carried out to obtain the morphology of slurry diffusion and critical splitting pressures in a single sealed fracture under various true triaxial stress states. This device can act as a new tool for the design of grouting parameters in deep engineering projects.

Highlights 1.

A novel true-triaxial large experimental system for simulating grouting was established to reproduce the grouting process in deep rock engineering projects.

The simulation test of the whole grouting process from slurry diffusion and fill-up to splitting a single sealed fracture under true triaxial stress was carried out for the first time.

The simulation test revealed the morphology of the slurry during diffusion in the rough fracture, and the critical grouting pressures during splitting were obtained under different stress states.