公开(公告)号：US12196723B2

公开(公告)日：2025-01-14

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

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.

公开(公告)号：US11385150B2

公开(公告)日：2022-07-12

申请号：US16966379

申请日：2019-04-28

Applicant: Northeastern University

Inventor： Xiwei Zhang ,  Xiating Feng ,  Donghui Ma

IPC: G01N3/08

Abstract: A double-layer concentric loading frame structure suitable for a true triaxial testing machine includes an inner-layer frame, an outer-layer frame and a base. A square slot hole is formed in a middle part of the inner-layer frame. The inner-layer frame is mounted on the base through a support platform. Actuators are mounted at a top end and a bottom end of the inner-layer frame. The outer-layer frame sleeves the inner-layer frame concentrically. Four actuators are distributed on an outer periphery of the outer-layer frame. A support plate is mounted at the top end of the inner-layer frame, and two lifting driving cylinders are mounted on the support plate. Piston rods of the lifting driving cylinders extend below the support plate and are connected to an upper surface of the outer-layer frame. A guide post is mounted on the upper surface of the outer-layer frame and extends above the support plate.

公开(公告)号：US11965860B2

公开(公告)日：2024-04-23

申请号：US17618378

申请日：2020-12-08

Applicant: Northeastern University

Inventor： Xiating Feng ,  Jiuyu Zhang ,  Feng Lin ,  Shiping Li ,  Xiangxin Su ,  Tianyang Tong

IPC: E21D9/00 ,  E21B7/00 ,  G01N3/06 ,  G01N3/12 ,  G01N3/60 ,  G01N22/02

CPC classification number: G01N3/068 ,  G01N3/12 ,  G01N3/60 ,  G01N22/02 ,  G01N2203/0019 ,  G01N2203/0048 ,  G01N2203/0057 ,  G01N2203/0067 ,  G01N2203/06 ,  G01N2203/0647 ,  G01N2203/0658

Abstract: Provided is a test system for hard rock breaking by a microwave intelligent loading based on true triaxial stress, including: a true triaxial stress loading device consisting of a loading frame and a rock sample moving structure; a microwave-induced hard rock breaking device consisting of an excitation cavity, a rectangular waveguide, a magnetron, a thermocouple, a circulator, a cold water circulation device, a flowmeter, a power meter, an automatic impedance tuner, a coupler, a microwave heater and a shielding cavity; and a dynamic rock response monitoring and intelligent microwave parameter control system consisting of a CCD industrial camera, a temperature acquisition device and an anti-electromagnetic high-temperature resistant acoustic wave-acoustic emission integrated sensor. According to the test system, the microwave-induced hard rock breaking test, dynamic monitoring temperature and rock breaking in microwave-induced breaking process and intelligent control over microwave power and heating time are achieved.

公开(公告)号：US10858910B2

公开(公告)日：2020-12-08

申请号：US16317738

申请日：2018-05-16

Applicant: NORTHEASTERN UNIVERSITY

Inventor： Xiating Feng ,  Gaoming Lu ,  Yuanhui Li ,  Xiwei Zhang ,  Jianhua Wen ,  Tianyang Tong ,  Yanhua Gong

IPC: E21B36/04 ,  E21B43/26 ,  E21B43/285

Abstract: A high-power microwave borehole fracturing device for an engineering rock mass includes a high-power microwave generator, a high-power microwave coaxial heater, a high-power low-loss microwave coaxial transmission line, and a microwave power adaptive regulation and control system. The high-power microwave generator includes a continuous wave magnetron, a permanent magnet, a waveguide excitation chamber, a coaxial circulator, a coaxial matching load, a coaxial coupling converter, a waveguide coaxial converter, and an output waveguide. The high-power microwave coaxial heater includes a microwave transmission inner conductor, a microwave transmission outer conductor, a microwave input connector, a microwave short circuit cap, and a conductor supporting cylinder. The high-power low-loss microwave coaxial transmission line includes an input end coaxial line, middle section coaxial lines, and an output end coaxial line. The microwave power adaptive regulation and control system includes an impedance matching regulator, a microwave power controller, and a temperature sensor.

公开(公告)号：US11951651B2

公开(公告)日：2024-04-09

申请号：US17599867

申请日：2020-11-16

Applicant: Northeastern University

Inventor： Xiating Feng ,  Zhengwei Li ,  Shiming Mei ,  Yanhua Gong

IPC: B28B1/00 ,  B28B17/00 ,  B33Y10/00 ,  B33Y50/02

CPC classification number: B28B1/001 ,  B28B17/0081 ,  B33Y10/00 ,  B33Y50/02

Abstract: Provided is an intelligent 3D printing method for a large 3D deep complex engineering geological model, including the steps of firstly, determining physical and mechanical parameters of the similar materials of the intact rock mass and the rock mass structure, and selecting a cementing agent; performing a small-scale 3D printing test at different material ratios and 3D printing parameters; determining the 3D printing similar material ratios and the 3D printing parameters; establishing a 3D digital model, planning printing paths, and determining pore diameters, number and combination form of the print heads; conveying the similar materials to the print heads; under the control of a 3D printing intelligent coupling control system, running each print head according to the planned and generated printing paths to complete printing; and finally, testing a printing effect of the model.

公开(公告)号：US11913336B2

公开(公告)日：2024-02-27

申请号：US17618365

申请日：2021-04-01

Applicant: Northeastern University

Inventor： Xiating Feng ,  Feng Lin ,  Chengxiang Yang ,  Jun Tian ,  Tianyang Tong ,  Shiping Li

IPC: E21B3/02 ,  E21C51/00 ,  E21B15/00 ,  E21B25/00 ,  H02K11/30 ,  E21B7/00 ,  H01P5/12

CPC classification number: E21C51/00 ,  E21B3/02 ,  E21B7/00 ,  E21B15/003 ,  E21B25/00 ,  H01P5/12 ,  H02K11/30

Abstract: The invention relates to a low-power microwave coring machine suitable for lunar rocks and a use method. The low-power microwave coring machine suitable for lunar rocks comprises an equipment platform, wherein the support framework front plate and the support framework rear plate are mounted on the equipment platform in a sliding manner, a rear end surface of the support framework rear plate is connected with a front end of the microwave generator mounted on the equipment platform, a rear end of the microwave generator is sequentially connected with the fixed waveguide, the rotary waveguide, the power divider and the drill drum, the high-precision slip ring structure is mounted on the drill drum, the gear ferrules are arranged on an outer wall of the rotary waveguide and an outer wall of the drill drum.

公开(公告)号：US11119018B2

公开(公告)日：2021-09-14

申请号：US17059169

申请日：2019-12-20

Applicant: Northeastern University

Inventor： Xiating Feng ,  Mian Tian ,  Fengpeng Zhang ,  Jun Tian ,  Chengxiang Yang ,  Jianyu Peng ,  Yuemao Zhao ,  Jikai Gao ,  Jianqing Jiang

IPC: G01N3/12 ,  G01N3/36

Abstract: A true triaxial testing system for disturbance experiment with broadband and low amplitude of a high pressure hard rock includes a low-frequency disturbance true triaxial mechanism, a variable-frequency low-speed disturbance rod mechanism and a rapid single-side unloading type specimen box. The low-frequency disturbance true triaxial mechanism and the variable-frequency low-speed disturbance rod mechanism are distributed along a straight line. The low-frequency disturbance true triaxial mechanism is independently used or cooperates with the variable-frequency low-speed disturbance rod mechanism for use. The rapid single-side unloading type specimen box cooperates with the low-frequency disturbance true triaxial mechanism for use.

公开(公告)号：US12188338B2

公开(公告)日：2025-01-07

申请号：US18260454

申请日：2023-04-21

Applicant: Northeastern University

Inventor： Feng Lin ,  Xiating Feng ,  Chengxiang Yang ,  Jiuyu Zhang ,  Shiping Li ,  Tianyang Tong ,  Xiangxin Su

IPC: E21B43/26 ,  E21B7/15

Abstract: A microwave drill bit capable of achieving fracturing of a borehole wall and end of a deep hard rock while drilling and a use method thereof are provided. The microwave drill bit comprises a microwave drill bit body, wherein a support frame front plate, a metal sleeve and a water inlet ring sequentially sleeve on the microwave drill bit body, the metal sleeve is connected with a rotary drive I mounted on the support frame front plate, the microwave drill body is connected with a microwave mode converter and a microwave splitter II respectively, the microwave mode converter and the microwave splitter II are connected with a microwave splitter I by a rectangular waveguide, the microwave splitter I is sequentially connected with a microwave rotating joint, a fixed waveguide and a microwave generator, and the microwave rotating joint is connected with a rotary drive II mounted on the support frame rear plate.

公开(公告)号：US11326995B2

公开(公告)日：2022-05-10

申请号：US16965521

申请日：2019-09-26

Applicant: Northeastern University

Inventor： Xiating Feng ,  Jun Zhao ,  Jun Tian ,  Chengxiang Yang

IPC: G01N3/10 ,  G01N3/18 ,  G01N3/24 ,  G01N3/12

Abstract: The invention provides a multi-functional true triaxial shear test device and method for hard rocks, the device comprises a hydraulic system, a left-end combination tangential loading oil cylinder, a right-end combination tangential loading oil cylinder, a front-end combination lateral loading oil cylinder, a rear-end combination lateral loading oil cylinder, an upper normal loading oil cylinder, a lower normal loading oil cylinder, an annular framework, a lateral auxiliary push-and-pull framework, an annular framework support platform, a horizontal support platform and a test chamber. The stiffness of the device is improved, and besides, a total section stress covering loading manner of the rock samples in a shear process is guaranteed. Through improving a temperature reduction manner of front ends of the oil cylinders, the situation that high temperature does not enable the temperature of hydraulic oil in the oil cylinders to rise to affect normal motion of the actuator can be guaranteed.

公开(公告)号：US10697281B2

公开(公告)日：2020-06-30

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.