公开(公告)号：US11788930B2

公开(公告)日：2023-10-17

申请号：US17584474

申请日：2022-01-26

Applicant: Taiyuan University of Technology

Inventor： Guorui Feng ,  Jinwen Bai ,  Xudong Shi ,  Boqiang Cui ,  Xinyu Yang ,  Kai Wang ,  Haotian Wu

IPC: G01N3/10 ,  G01M13/04 ,  G01L5/00

CPC classification number: G01M13/04 ,  G01L5/0009

Abstract: A device and method for testing bearing capacity of single-row grouped pillars in a horizontal goaf under biaxial loading is disclosed. Four fixed rings are arranged on testing machine base, and have stands installed therein respectively, bottom ends of the stands are connected with the base, top ends are connected with transverse frame, sliding rails are arranged on two sides of the base; the vertical force loading devices are arranged at a lower part of transverse frame and the horizontal force loading devices are arranged at inner sides of side frame. Simultaneous loading on multiple coal samples, rock samples, filling body samples, concrete samples, coal-filling samples and/or rock-filling samples can be achieved, the overall bearing capacity of a single-row group pillar system in the horizontal goaf under the biaxial compression condition can be obtained, and the mutual influence relation between grouped pillar individuals in the horizontal goaf can be attained.

公开(公告)号：US12025590B2

公开(公告)日：2024-07-02

申请号：US17835926

申请日：2022-06-08

Applicant: Taiyuan University of Technology

Inventor： Guorui Feng ,  Kai Wang ,  Jinwen Bai ,  Jun Guo ,  Boqiang Cui ,  Xudong Shi ,  Haotian Wu ,  Xinyu Yang ,  Cheng Song

IPC: G01N3/10

CPC classification number: G01N3/10 ,  G01N2203/0019

Abstract: A loading system for a Hopkinson pressure bar test under water-gas-temperature multi-field coupling action includes: a sample sealed cabin which includes sealing flanges, Y-shaped and high-temperature resistant sealing rings, and a sealed cabin body; a gas pressure loading device which includes a high-pressure gas tank, a pressure regulating valve, a second barometer, a second high-pressure valve and a first three-way valve connected in sequence; a water pressure loading device which includes an electric pressure test water pump, a water pressure gauge, an accumulator and a one-way valve connected in sequence; a temperature loading device which includes thermocouple heating rods, a temperature display and a thermocouple temperature control circuit board connected in sequence; and a dynamic and static combined loading device which includes an axial pressure loading device, an impact loading device and a Hopkinson pressure bar member.