公开(公告)号：US20190242228A1

公开(公告)日：2019-08-08

申请号：US16061799

申请日：2018-02-12

Applicant: Northeastern University

Inventor： Xiating FENG ,  Zhengwei LI ,  Xiwei ZHANG ,  Jun TIAN ,  Chengxiang YANG ,  Zhibin YAO ,  Qiang WANG ,  Yanhua GONG

IPC: E21B43/26 ,  F04B51/00

Abstract: A large-scale three-dimensional physical model test system for a deep cavern group comprises a base, an anti-deformation prestressed loading frame assembly, a load applying assembly, a model sample preparation and transportation assembly and a multifunctional hydraulic loading system assembly. The anti-deformation prestressed loading frame assembly and the model sample preparation and transportation assembly are both arranged on the base. The load applying assembly is arranged on the anti-deformation prestressed loading frame assembly, and the load applying assembly is connected with the multifunctional hydraulic loading system assembly. A model sample is subjected to long-time load holding, dynamic disturbance and displacement control overload under multi-surface multi-point cooperative control through cooperation between the load applying assembly and the multifunctional hydraulic loading system assembly.

公开(公告)号：US20240248018A1

公开(公告)日：2024-07-25

申请号：US18546401

申请日：2023-02-23

Applicant: Northeastern University

Inventor： Benguo HE ,  Xiating FENG ,  Jie WANG ,  Rongli ZHEN ,  Hongpu LI ,  Mian TIAN ,  Zhibin YAO

IPC: G01N3/08

CPC classification number: G01N3/08 ,  G01N2203/0208 ,  G01N2203/0256

Abstract: A dual-direction synchronous loading method for a true-triaxial test apparatus includes the following steps: Step S1, loading a sample and adjusting the sample at a center of a sample box and a rigid loading frame; Step S2, setting parameters and sending action instructions through a computer control panel; and Step S3, collecting load signals collected by each sensor acquired by a PID controller, and coordinating a size of triaxial dual-direction loading loads to realize a single instruction dual-direction synchronous loading. The method ensures that a rock sample is kept at a center of a pressure chamber before being loaded, so that a focus of a loading axis is always at a same position as a center of the sample in space, and the function of synchronous loading of two loading actuators in the same direction under a single instruction can be achieved.

公开(公告)号：US20240230495A1

公开(公告)日：2024-07-11

申请号：US17912926

申请日：2022-07-22

Applicant: Northeastern University

Inventor： Xiating FENG ,  Xiwei ZHANG ,  Lei SHI ,  Zhibin YAO

IPC: G01N3/30 ,  G01N3/10 ,  G01N33/24

CPC classification number: G01N3/30 ,  G01N3/10 ,  G01N33/24 ,  G01N2203/001 ,  G01N2203/0019 ,  G01N2203/0026 ,  G01N2203/0044 ,  G01N2203/0048 ,  G01N2203/0053 ,  G01N2203/0067 ,  G01N2203/0256 ,  G01N2203/0298 ,  G01N2203/0605 ,  G01N2203/0611 ,  G01N2203/0635 ,  G01N2203/0641 ,  G01N2203/0658

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 CO2 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.