Large-scale three-dimensional physical simulation test system for whole development process of deep engineering rock burst

Patent metadata

Field	Value
Publication number	US-12196723-B2
Application number	US-202217912926-A
Country	US
Kind code	B2
Filing date	Jul 22, 2022
Priority date	Jul 13, 2022
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

The invention relates to a large-scale three-dimensional physical simulation test system for the whole development process of deep engineering rock burst. A CO 2 blast cracking device, a dynamic fiber grating and ultrasonic probes are pre-embedded in a physical model sample of similar materials. Acoustic emission probes are pre-mounted on the boundary of a sample. A tunnel excavated in the sample is provided with a three-way acceleration sensor and an industrial endoscope. A sample 3D printer and a drop hammer impact device are arranged outside the three-dimensional static stress loading device. A hydraulic oil source and a controller are arranged outside the three-dimensional static stress loading device and mounted on the ground. The controller is connected with a computer.

First claim

What is claimed is:

1. A large-scale three-dimensional physical simulation test system for a whole development process of a deep engineering rock burst, comprising: a three-dimensional static stress loading device, a 3D printer for a physical model sample of similar materials, a CO 2 blast cracking device, a split Hopkinson pressure bar device, a miniature rotary excavation flexible mechanical arm device, a drop hammer impact device, a hydraulic oil source and a controller,
wherein the CO 2 blast cracking device is arranged in the physical model sample of similar materials, and the physical model sample of similar materials is located in the three-dimensional static stress loading device,
the split Hopkinson pressure bar device and the miniature rotary excavation flexible mechanical arm device are arranged outside the three-dimensional static stress loading device, and the split Hopkinson pressure bar device, the three-dimensional static stress loading device and the miniature rotary excavation flexible mechanical arm device are arranged in a linear order and all of them are fixedly mounted on the ground,
the 3D printer for the physical model sample of similar materials is located outside the three-dimensional static stress loading device, and is mounted on the ground through a track movement structure, and a moving path of the 3D printer for the physical model sample of similar materials passes through a position right above the three-dimensional static stress loading device,
the drop hammer impact device is located outside the three-dimensional static stress loading device and is mounted on the ground through the track movement structure, and a moving path of the drop hammer impact device passes through the position right above the three-dimensional static stress loading device, and
the hydraulic oil source and the controller are arranged outside the three-dimensional static stress loading device and both are fixedly mounted on the ground, and the controller is connected with a computer.

2. The large-scale three-dimensional physical simulation test system according to claim 1 , wherein the three-dimensional static stress loading device comprises a high-rigidity three-dimensional reaction frame, a first dynamic hydraulic actuator, a second dynamic hydraulic actuator, a first flexible bladder hydraulic pillow, a second flexible bladder hydraulic pillow, a third flexible bladder hydraulic pillow, a fourth flexible bladder hydraulic pillow and a fifth flexible bladder hydraulic pillow, and
wherein the high-rigidity three-dimensional reaction frame adopts an integral structure, and loading holes are respectively formed on the top, the left side and the right side of the high-rigidity three-dimensional reaction frame,
a frame top cover is fixedly mounted on the top of the high-rigidity three-dimensional reaction frame, and the first dynamic hydraulic actuator is vertically and fixedly mounted at the center of the frame top cover,
the second dynamic hydraulic actuator is horizontally and fixedly mounted on the left side of the high-rigidity three-dimensional reaction frame,
a frame side cover is fixedly mounted on the right side of the high-rigidity three-dimensional reaction frame, and a simulation excavation hole is formed at the center of the frame side cover,
the first flexible bladder hydraulic pillow is arranged on the lower surface of the frame top cover, and adopts a circular structure,
the second flexible bladder hydraulic pillow is arranged at the bottom of the high-rigidity three-dimensional reaction frame,
the third flexible bladder hydraulic pillow is arranged on the front side of the high-rigidity three-dimensional reaction frame,
the fourth flexible bladder hydraulic pillow is arranged on the rear side of the high-rigidity three-dimensional reaction frame, and
the fifth flexible bladder hydraulic pillow is arranged on the inner surface of the frame side cover, and adopts the circular structure.

3. The large-scale three-dimensional physical simulation test system according to claim 2 , wherein the first flexible bladder hydraulic pillow is connected with the hydraulic oil source through a hydraulic oil path, and a first pressure sensor is arranged on the hydraulic oil path between the first flexible bladder hydraulic pillow and the hydraulic oil source,
the second flexible bladder hydraulic pillow is connected with the hydraulic oil source through the hydraulic oil path, and a second pressure sensor is arranged on the hydraulic oil path between the second flexible bladder hydraulic pillow and the hydraulic oil source,
the third flexible bladder hydraulic pillow is connected with the hydraulic oil source through the hydraulic oil path, and a third pressure sensor is arranged on the hydraulic oil path between the third flexible bladder hydraulic pillow and the hydraulic oil source,
the fourth flexible bladder hydraulic pillow is connected with the hydraulic oil source through the hydraulic oil path, and a fourth pressure sensor is arranged on the hydraulic oil path between the fourth flexible bladder hydraulic pillow and the hydraulic oil source,
the fifth flexible bladder hydraulic pillow is connected with the hydraulic oil source through the hydraulic oil path, and a fifth pressure sensor is arranged on the hydraulic oil path between the fifth flexible bladder hydraulic pillow and the hydraulic oil source, and
data output ends of the first pressure sensor, the second pressure sensor, the third pressure sensor, the fourth pressure sensor and the fifth pressure sensor are all electrically connected with the controller.

4. The large-scale three-dimensional physical simulation test system according to claim 3 , wherein a piston rod of the first dynamic hydraulic actuator adopts a hollow structure, and a first annular load sensor and a first pressure bearing cushion block are sequentially arranged between the piston rod of the first dynamic hydraulic actuator and the physical model sample of similar materials,
a first magnetostrictive displacement sensor is arranged between the piston rod of the first dynamic hydraulic actuator and its cylinder cap,
a piston rod of the second dynamic hydraulic actuator adopts a hollow structure, and a second annular load sensor and a second pressure bearing cushion block are sequentially arranged between the piston rod of the second dynamic hydraulic actuator and the physical model sample of similar materials,
a second magnetostrictive displacement sensor is arranged between the piston rod of the second dynamic hydraulic actuator and its cylinder cap, and
the first annular load sensor, the first magnetostrictive displacement sensor, the second annular load sensor and the second magnetostrictive displacement sensor are all electrically connected with the controller.

5. The large-scale three-dimensional physical simulation test system according to claim 4 , wherein the hydraulic oil path of the first dynamic hydraulic actuator is connected with the hydraulic oil source through a first servo valve block, and first accumulator groups are mounted on the first servo valve block,
an electric control end of the first servo valve block is electrically connected with the controller,
the hydraulic oil path of the second dynamic hydraulic actuator is connected with the hydraulic oil source through second servo valve blocks, and second accumulator groups are respectively mounted on the second servo valve blocks, and
electric control ends of the second servo valve blocks are electrically connected with the controller.

6. The large-scale three-dimensional physical simulation test system according to claim 5 , wherein an emission rod of the split Hopkinson pressure bar device sequentially passes through a center hole of the piston rod of the second dyn

Assignees

• Univ Northeastern

Inventors

• Feng Xiating
• Zhang Xiwei
• Shi Lei
• Yao Zhibin

Classifications

• G01N2203/0658

  using acoustic or ultrasonic detectors · CPC title

• G01N2203/0641

  using optical, X-ray, ultraviolet, infrared or similar detectors · CPC title

• G01N2203/0635

  using magnetic properties · CPC title

• G01N2203/0611

  Hydraulic or pneumatic indicating, recording or sensing means · CPC title

• G01N2203/0605

  Mechanical indicating, recording or sensing means · CPC title