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.

公开(公告)号：US20220412855A1

公开(公告)日：2022-12-29

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: G01N3/06 ,  G01N3/12 ,  G01N3/60 ,  G01N22/02

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：US20220288812A1

公开(公告)日：2022-09-15

申请号：US17599867

申请日：2020-11-16

Applicant: Northeastern University

Inventor： Xiating FENG ,  Zhengwei LI ,  Shiming MEI ,  Yanhua GONG

IPC: B28B17/00 ,  B28B1/00 ,  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：US20210247283A1

公开(公告)日：2021-08-12

申请号：US16965521

申请日：2019-09-26

Applicant: Northeastern University

Inventor： Xiating FENG ,  Jun ZHAO ,  Jun TIAN ,  Chengxiang YANG

IPC: 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：US20240392683A1

公开(公告)日：2024-11-28

申请号：US18259760

申请日：2023-05-18

Applicant: Northeastern University

Inventor： Feng LIN ,  Xiating FENG ,  Chengxiang YANG ,  Jiuyu ZHANG ,  Tianyang TONG ,  Yunchan AO ,  Juan HE

IPC: E21C37/16

Abstract: A mechanical continuous mining device integrating microwaves and cutter heads, and a use method are provided. The mechanical continuous mining device comprises an equipment platform, a cutter head cutting system, a microwave fracturing system, a loading device and a cantilever crane. The microwave fracturing system and the cutter head cutting system are fixed to the equipment platform, and the loading device and the cantilever crane are mounted at a front end of the equipment platform. A microwave mechanical longwall mining method for a metallic ore is provided. Microwaves move in sync with machines to break a rock, microwave fracturing methods comprise high-power microwave integral fracturing and local rapid fracturing of soft microwave coaxial lines in the cutter heads; and a lateral cutting method of an ore body by a cutter head technology is applied, a mechanical rock breaking principle is changed from previous extrusion breaking to tension breaking.

公开(公告)号：US20240044740A1

公开(公告)日：2024-02-08

申请号：US18547754

申请日：2022-11-25

Applicant: Northeastern University

Inventor： Benguo HE ,  Xiating FENG ,  Jie WANG ,  Shichen QIU ,  Xiangrui MENG ,  Lei WANG

IPC: G01M7/08 ,  G01N3/313 ,  G01N33/24

CPC classification number: G01M7/08 ,  G01N3/313 ,  G01N33/24

Abstract: The invention provides a method and system for a blast-induced vibration monitoring of a tunnel in high asymmetric in-situ stresses. According to the method, triaxial vibration sensors are respectively fixed in areas having different radial depths inside surrounding rocks of a stress concentration area behind a tunnel face of the tunnel in high asymmetric in-situ stresses, and each triaxial vibration sensor monitors blast vibration velocity and acceleration at a position thereof. The system comprises a plurality of triaxial vibration sensors which are fixed in areas having different radial depths inside surrounding rocks of a stress concentration area behind a tunnel face of the tunnel in high asymmetric in-situ stresses, and each triaxial vibration sensor is used for monitoring blast vibration velocity and acceleration at a position thereof. The method and system can improve the safety and the efficiency of tunnel excavation construction.

公开(公告)号：US20230332991A1

公开(公告)日：2023-10-19

申请号：US17920553

申请日：2019-09-18

Applicant: Northeastern University

Inventor： Xiating FENG ,  Xiaojun YU ,  Jun TIAN

IPC: G01N3/12 ,  G01N3/06

CPC classification number: G01N3/12 ,  G01N3/066 ,  G01N2203/0256

Abstract: The invention relates to a one-way rapid electromagnetic unloading device suitable for a true triaxial testing machine, comprising a first electromagnet, a second electromagnet, a first electromagnet mounting base, a second electromagnet mounting base and a restraining disc. A frame of the true triaxial testing machine is provided with a mounting hole for the unloading device. The first electromagnet mounting base is fixedly mounted in the mounting hole for the unloading device, and the first electromagnet is fixedly mounted on the first electromagnet mounting base. The restraining disc is fixedly mounted at an opening of the mounting hole for the unloading device, and the second electromagnet mounting base is located between the restraining disc and the first electromagnet. The second electromagnet is fixedly mounted on the second electromagnet mounting base and is opposite to the first electromagnet.

公开(公告)号：US20230243259A1

公开(公告)日：2023-08-03

申请号：US18023481

申请日：2021-04-01

Applicant: NORTHEASTERN UNIVERSITY

Inventor： Xiating FENG ,  Feng LIN ,  Chengxiang YANG ,  Jiuyu ZHANG ,  Xiangxin SU ,  Shiping LI

IPC: E21C37/00 ,  E21C41/22 ,  E21F15/00 ,  C22B4/08

CPC classification number: E21C37/00 ,  E21C41/22 ,  E21F15/00 ,  C22B4/08

Abstract: The invention relates to a microwave-mechanical fluidization mining system and a mining method for metal mines. The microwave-mechanical fluidization mining system comprises a microwave pre-splitting mechanical mining system, a microwave separation system, a high-power microwave focused melting system and a goaf, wherein ore-waste rock mixtures mined by the microwave pre-splitting mechanical mining system are transported to the microwave separation system through a conveyor I and an elevator on the microwave pre-splitting mechanical mining system, separated ores are transported to the high-power microwave focused melting system, and separated waste rocks are transported through a conveyor V to the goaf for filling. Microwave pre-splitting mechanical mining is adopted instead of a traditional blasting mining method to increase an excavation speed and avoid the influence of blasting on the stability of surrounding rocks.

公开(公告)号：US20230145203A1

公开(公告)日：2023-05-11

申请号：US17919439

申请日：2021-11-18

Applicant: Northeastern University

Inventor： Xiating FENG ,  Feng LIN ,  Chengxiang YANG ,  Jiuyu ZHANG ,  Shiping LI ,  Tianyang TONG ,  Xiangxin SU

IPC: E21C37/16 ,  H05B6/80

CPC classification number: E21C37/16 ,  H05B6/80 ,  H05B2206/044

Abstract: The invention provides a microwave plasma adaptive rock breaking device for microwave-insensitive rocks and a using method thereof, and relates to the technical field of rock breaking. The microwave plasma adaptive rock breaking device comprises a microwave system, a microwave plasma conversion system and a cutter head system. The microwave system and the microwave plasma conversion system are mounted in the cutter head system, and the microwave system is connected with the microwave plasma conversion system. Under the premise that only a microwave source is used to supply energy, the combined action of ordinary microwave irradiation and plasma irradiation in the form of high-temperature flame is realized, and a full-section hard rock tunnel boring machine is in cooperation for breaking rocks, so that the problem of microwave-induced cracks of the microwave-insensitive rocks is solved, and the application scope of a microwave rock breaking technology is enlarged.

公开(公告)号：US20210140861A1

公开(公告)日：2021-05-13

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.