Northeastern University

Chengxiang Yang

Xiating Feng

Feng Lin

Jun Tian

Shiping Li

Jiuyu Zhang

Tianyang Tong

Xiangxin Su

Xiwei Zhang

Mian Tian

Yanhua Gong

Zhengwei Li

Benguo He

Zhibin Yao

Jianqing Jiang

Jikai Gao

Yuemao Zhao

Qiang Wang

Jianyu Peng

Fengpeng Zhang

Jun Zhao

Rongli Zhen

Hongpu Li

Hongyuan Fu

Juan He

Yunchan Ao

He Benguo

Jiangqing Jiang

A mechanical ore sample testing device integrating microwaves and cutter heads, and a use method are provided. The mechanical ore sample testing 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.

Mechanical continuous mining device integrating microwaves and cutter heads, and use method

Provided is a clamp of elastic box of stiff true-triaxial testing system and a displacement monitoring method for cuboid specimens. The clamp includes six pressing plates and eight plate springs, which form an elastic pressure box. One surface of the elastic pressure box can be disassembled, which simplifies the steps of rock sample mounting, and saving the mounting time. The springs connected with the pressing plates ensures the stability of the clamp but cannot affect the stress state of other surfaces of the rock sample during the test of the rock sample, thereby ensuring test accuracy. The invention further provides a displacement monitoring method for the rock sample by using the elastic box clamp. Six displacement sensors are mounted on the elastic box clamp, and the displacement of the rock sample can be monitored in real time.

Clamp of elastic box of stiff true-triaxial testing system and displacement monitoring method for cuboid specimens

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.

Microwave drill bit capable of achieving fracturing of borehole wall and end of deep hard rock while drilling and use method thereof

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.

Low-power microwave coring machine suitable for lunar rocks and method of using the same

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 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 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.

Microwave-mechanical fluidization mining system and mining method for metal mines

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.

Microwave plasma adaptive rock breaking device for micro wave-insensitive rocks and method for using the same

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.

Multi-functional true triaxial shear test device and method for hard rocks with high temperature and high pressure

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.

True triaxial testing system for disturbance experiment with broadband and low amplitude of high pressure hard rock

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.

Large-scale three-dimensional physical model test system and method for deep cavern group

Growing community of inventors

Shenyang, China

Chengxiang Yang