Patent ID: 11860135
Assignee: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A three-dimensional dynamic and static load test method for simulating deep roadway excavation, which applies the three-dimensional dynamic and static load test system for simulating deep roadway excavation according to claim 2, the method comprising:
step 1: model laying and sensor layout
moving the box body forward with the support platform relative to the mobile platform, adjusting a material ratio based on mechanical parameters and a similarity ratio of different rock layers, and laying materials to form the similar material roadway model inside the box body; burying the acoustic emission probe, the strain gauge, the soil pressure box, the optical fiber sensor, and the grating displacement sensor in corresponding positions within the similar material roadway model during a process of material laying; placing the similar material roadway model for a set time after the material laying is completed; after the similar material roadway model is air dried and formed, removing the observation window, spraying scattered spots on a simulated roadway excavation position of the similar material roadway model, then reinstalling the observation window on the box body, and then moving the box body backward with the support platform relative to the mobile platform;
step 2: initial crustal stress simulation
according to the experimental scheme, loading the similar material roadway model to simulate an initial crustal stress state of roadway excavation, wherein the loading method is hierarchical loading under stress control, using the lateral loading cylinders and the axial loading cylinders to hierarchical synchronized load on the similar material roadway model, and maintaining loading for a set time after completing each level of loading;
step 3: roadway excavation simulation
using the roadway excavation device to excavate a simulated roadway in the similar material roadway model, the excavation parameters of the simulated roadway are set according to the similarity ratio, the simulated roadway excavated by the roadway excavation device is supported by steel rods or anchor cables;
step 4: dynamic load simulation
setting up a impact form of the axial actuators after the simulated roadway excavation is completed, and then applying the axial dynamic loads to the similar material roadway model through the axial actuators; setting up a impact form of the lateral actuators and then applying lateral dynamic loads to the similar material roadway model through the lateral actuators; applying axial impacts to the similar material roadway model through the drop hammer impact units; applying lateral impacts to the similar material roadway model through the plurality of pendulum impact units;
during step 2 to step 4, using the data monitoring unit to monitor the parameters of the similar material roadway model.