US 11,860,135 B2
Three-dimensional dynamic and static load test system for simulating deep roadway excavation and method thereof
Weiyao Guo, Qingdao (CN); Yueying Zhang, Qingdao (CN); Lexin Chen, Qingdao (CN); Dongxiao Zhang, Qingdao (CN); Yunliang Tan, Qingdao (CN); and Tongbin Zhao, Qingdao (CN)
Assigned to SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao (CN)
Filed by Shandong University of Science and Technology, Qingdao (CN)
Filed on May 15, 2023, as Appl. No. 18/317,198.
Application 18/317,198 is a continuation of application No. PCT/CN2022/073324, filed on Jan. 22, 2022.
Prior Publication US 2023/0280251 A1, Sep. 7, 2023
Int. Cl. G01N 3/34 (2006.01); G01N 3/12 (2006.01)
CPC G01N 3/34 (2013.01) [G01N 3/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A three-dimensional dynamic and static load test system for simulating deep roadway excavation, comprising a mobile platform, a box body, a support frame, a roadway excavation device, a data monitoring unit, a dynamic load control unit, and a main control unit, wherein
the mobile platform is provided with a support platform, the support platform is capable to move relative to the mobile platform, and the box body is placed on the support platform;
the box body is in a rectangular structure, a similar material roadway model is placed inside the box body, a detachable observation window is arranged on the box body, lateral bearing plates are respectively arranged at a left end and a right end inside of the box body, and an axial bearing plate arranged at a top inside of the box body;
the support frame is erected at the mobile platform and a left end, a right end, and a top end of the box body;
a left end of the support frame is provided with a plurality of pendulum impact units, each of the plurality of pendulum impact units comprises a first impact rod, a swing rod, a pendulum, a first fixed pulley, and a first pull rope, wherein the first impact rod passes through the box body and is capable to move along horizontal direction; one end of the first impact rod contacts the lateral bearing plate at the left end inside of the box body; an upper end of the swing rod is hinged to the support frame, and a lower end of the swing rod is provided with the pendulum; the first fixed pulley is arranged on the support frame, one end of the first pull rope is connected to the pendulum, and an other end of the first pull rope is led out through the first fixed pulley; after pulling the first pull rope and releasing the first pull rope, the swing rod swings relative to the support frame, and the pendulum strikes an other end of the first impact rod;
the left end of the support frame is provided with a plurality of lateral actuators, each of the plurality of lateral actuators is connected to one end of a second impact rod, the second impact rod passes through the box body, the second impact rod is capable to move in horizontal direction, and an other end of the second impact rod contacts the lateral bearing plate at the left end inside the box body;
a right end of the support frame is provided with a plurality of lateral loading cylinders, a loading end of each of the plurality of lateral loading cylinders passes through the box body, the loading end of each of the lateral loading cylinders conducts loading along horizontal direction, the loading end of each of the lateral loading cylinders contacts the lateral bearing plate at the right end inside the box body;
a top of the support frame is provided with a plurality of drop hammer impact units, each of the plurality of drop hammer impact units comprises a third impact rod, a drop hammer, a second fixed pulley, and a second pull rope, wherein the third impact rod passes through the box body and is capable to move along vertical direction, one end of the third impact rod contacts the axial bearing plate at the top inside of the box body, the second fixed pulley is arranged on the support frame, one end of the second pull rope is connected to the drop hammer, and the other end of the second pull rope is led out through the second fixed pulley; after pulling the second pull rope and releasing the second pull rope, the drop hammer hits an other end of the third impact rod;
the top of the support frame is provided with a plurality of axial actuators, each of the plurality of axial actuators is connected to one end of a fourth impact rod, the fourth impact rod passes through the box body, the fourth impact rod is capable to move along the vertical direction, and an other end of the fourth impact rod contacts the axial bearing plate at the top inside of the box body;
both the lateral actuators and the axial actuators are set as electro-hydraulic servo actuators, and the lateral actuators, the axial actuators, the lateral loading cylinders, and the axial loading cylinders share a high-pressure pump box;
the dynamic load control unit is connected to the lateral actuators and the axial actuators through signals, and the dynamic load control unit is connected to the main control unit through signals;
the main control unit controls the dynamic load control unit to apply a set impact form of dynamic loads to the lateral actuators and the axial actuators and change the impact force and frequency; the lateral actuators and the axial actuators apply axial dynamic loads to the similar material roadway model to simulate continuous disturbances in surrounding roadway excavation and mining engineering of surrounding working faces;
the top of the support frame is provided with a plurality of axial loading cylinders, a loading end of each of the plurality of axial loading cylinders passes through the box body, the loading end of each of the axial loading cylinders conducts loading along vertical direction, and the loading end of each of the axial loading cylinders contacts the axial bearing plate at the top inside of the box body;
the roadway excavation device is configured to excavate simulated roadway in the similar material roadway model; and
the data monitoring unit is configured to monitor parameters of the similar material roadway model during a process of excavating the simulated roadway.