Abstract：In order to realize the simulation of unloading process of roadway excavation in the laboratory and to obtain the innovative monitoring method，a system that use the cylindrical hollow specimen of rock to simulate the unloading path of the excavation of tunnel rock was developed. The system consists mainly of three independent sub-systems：sub-system I：SAM–3000 microcomputer controlled electro-hydraulic servo rock triaxial test system；sub-system II：the loading and unloading chamber of the hollow cylindrical specimen of rock；sub-system III：Acoustic-Acoustic Emission Integrated Testing System. Through the integration and debugging to the software and hardware of the three subsystems，the indoor simulation of the excavation unloading process of the hollow cylindrical specimen(290 mm in height，200 mm in outer diameter and 100 to 150 mm in diameter) were obtained. The preliminary results of the excavation unloading test to the hollow cylindrical specimen of rock show that the system can effectively simulate and reproduce the excavation unloading conditions on the rock surrounding roadway and can effectively simulate the deformation，stress distribution and failure mechanism of the rock surrounding roadway under the condition of excavation unloading.
侯公羽，李小瑞，张振铎，梁洪垚，张继成. 使用小型围岩试件模拟与再现巷道围岩开挖卸荷过程的试验系统[J]. 岩石力学与工程学报, 2017, 36(9): 2136-2145.
HOU Gongyu，LI Xiaorui，ZHANG Zhenduo，LIANG Hongyao，ZHANG Jicheng. Experimental system for simulating excavation unloading process of rock around roadway by using small cylindrical hollow specimen. , 2017, 36(9): 2136-2145.
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2017, Vol. 36 
