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CN-224202956-U - Abrasive jet auxiliary TBM rock breaking test device loaded by coupling confining pressure

CN224202956UCN 224202956 UCN224202956 UCN 224202956UCN-224202956-U

Abstract

The utility model provides an abrasive jet flow auxiliary TBM rock breaking test device for coupling confining pressure loading, which comprises an abrasive jet flow mechanism, a confining pressure loading mechanism and a hob penetrating mechanism, wherein the abrasive jet flow mechanism comprises a pressurizing part, the pressurizing part is connected with a slurry supply part, the pressurizing part is connected with a jet flow nozzle, a carrier seat is arranged in the confining pressure loading mechanism, a rock sample is placed on the carrier seat, and the hob penetrating mechanism is arranged on the confining pressure loading mechanism. By additionally arranging the abrasive jet mechanism, the TBM rock breaking test under the assistance of abrasive jet can be realized, and by arranging the confining pressure loading mechanism, the confining pressure applied to the periphery of the rock sample can be regulated, so that the influence on the TBM rock breaking test under the assistance of abrasive jet under the condition of different confining pressures is researched.

Inventors

  • WANG QIANYI
  • XU CHEN
  • ZHANG CONGRUI
  • QIU LANG
  • LU WENGUANG
  • WANG CHAO

Assignees

  • 武汉理工大学

Dates

Publication Date
20260505
Application Date
20250115

Claims (10)

  1. 1. An abrasive jet assisted TBM rock breaking test device coupled with confining pressure loading, comprising: The abrasive jet mechanism (1), the abrasive jet mechanism (1) comprises a pressurizing part, the pressurizing part is connected with a slurry supply part, and the pressurizing part is connected with a jet nozzle (104); the confining pressure loading mechanism (2), wherein a carrier seat (205) is arranged in the confining pressure loading mechanism (2), and a rock sample (4) is placed on the carrier seat (205); And the hob penetration mechanism (3) is arranged on the confining pressure loading mechanism (2).
  2. 2. The abrasive jet auxiliary TBM rock breaking test device for coupling confining pressure loading is characterized in that the pressurizing part comprises a high-pressure resistant cylinder body (103) and a first three-way pipe (112), a floating piston (111) is connected in the high-pressure resistant cylinder body (103) in a matched mode, the high-pressure resistant cylinder body (103) is divided into a bottom cavity and a top cavity through the floating piston (111), the bottom cavity is connected with one end of the first three-way pipe (112), the other two ends of the first three-way pipe (112) are respectively connected with a first pipeline and a second pipeline, one ends, far away from the first three-way pipe (112), of the first pipeline are connected with a second container (102) for containing clear water, a high-pressure pump (108) and a water supply one-way valve (109) are sequentially arranged on the first pipeline in a direction far away from the second container (102), and a drain valve (110) is arranged on the second pipeline.
  3. 3. The abrasive jet flow assisted TBM rock breaking test device coupled with confining pressure loading as set forth in claim 1, wherein the abrasive jet flow mechanism (1) further comprises a second three-way pipe (113), one end of the second three-way pipe (113) is communicated with the top cavity, and the other two ends of the second three-way pipe (113) are respectively connected with the slurry supply part and the jet flow nozzle (104).
  4. 4. The abrasive jet auxiliary TBM rock breaking test device for coupling confining pressure loading according to claim 1, wherein the slurry supply part comprises a first container (101) for containing abrasive slurry, one ends of the first container (101) and a second tee pipe (113) are connected with a third pipeline, and a low-pressure pump (105) and a feed one-way valve (106) are sequentially arranged on the third pipeline along a direction far away from the first container (101).
  5. 5. The abrasive jet auxiliary TBM rock breaking test device coupled with confining pressure loading according to claim 1, wherein one end of the jet nozzle (104) and one end of the second tee pipe (113) are connected with a fourth pipeline, and a slurry discharge valve (107) is arranged on the fourth pipeline.
  6. 6. The abrasive jet assisted TBM rock breaking test device coupled with confining pressure loading according to claim 1, wherein the confining pressure loading mechanism (2) comprises a metal frame (201), a first hydraulic jack (204) is installed on the front inner wall and the right inner wall of the metal frame (201), a first spoke sensor (202) is installed on the rear inner wall and the left inner wall of the metal frame (201), and a first pressure head (203) is arranged on the first spoke sensor (202).
  7. 7. A coupled confining pressure loaded abrasive jet assisted TBM rock breaking test device as claimed in claim 1 wherein the carrier (205) is placed on the bottom inner wall of the metal frame (201).
  8. 8. The abrasive jet assisted TBM rock breaking test device coupled with confining pressure loading according to claim 6, wherein the hob penetration mechanism (3) comprises a second hydraulic jack (303) and a top plate (304), the top plate (304) is located above the metal frame (201), a second spoke sensor (306) is installed at the bottom of the top plate (304), a second pressure head (307) is arranged at the bottom of the second spoke sensor (306), a hob (308) is installed at the bottom of the second pressure head (307), and the second hydraulic jack (303) is arranged at the bottom of the metal frame (201).
  9. 9. The abrasive jet auxiliary TBM rock breaking test device for coupling confining pressure loading according to claim 8, wherein the hob penetration mechanism (3) further comprises a bottom plate (301), vertical guide posts (302) are fixedly arranged at four corners of the top surface of the bottom plate (301), guide holes (2011) are formed at four corners of the bottom of the metal frame (201), and the guide posts (302) are in sliding connection with the guide holes (2011).
  10. 10. The abrasive jet assisted TBM rock breaking test device coupled with confining pressure loading according to claim 9, wherein studs (3041) are fixedly arranged at the top ends of the guide posts (302), through holes are formed in four corners of the top plate (304), the studs (3041) penetrate through the through holes, and nuts (305) are arranged on the studs (3041) in a threaded mode.

Description

Abrasive jet auxiliary TBM rock breaking test device loaded by coupling confining pressure Technical Field The utility model relates to the field of rock breaking experiments, in particular to an abrasive jet auxiliary TBM rock breaking test device for coupling confining pressure loading. Background In recent years, with development towards the western part, TBM tunneling is difficult due to factors such as high ground stress, extremely hard rock and the like caused by large burial depth, so that the high-pressure abrasive water jet assisted TBM rock breaking technology is focused, and is also regarded as the assisted rock breaking technology with the most engineering application potential. The TBM combined high-pressure water jet rock breaking is the result of interaction of a TBM hob and high-pressure water jet and rock, and the combined rock breaking mechanism model is a theoretical basis for determining reasonable design and arrangement of the TBM hob and the high-pressure water jet, and has important significance for improving the combined rock breaking efficiency and reducing the construction cost. The existing TBM rock breaking test device lacks the research of a combined rock breaking test under the assistance of abrasive jet flow, and simultaneously aims at the problem that the existing test cannot effectively simulate and control initial ground stress, so that the abrasive jet flow assisted TBM rock breaking test under the condition of simulating different confining pressures is difficult to realize. Disclosure of utility model The utility model aims to solve the technical problem of combined rock breaking test research under the assistance of abrasive jet flow. And an abrasive jet auxiliary TBM rock breaking test device for coupling confining pressure loading is provided. The utility model solves the technical problems by the following technical proposal: The utility model provides an abrasive jet flow auxiliary TBM rock breaking test device for coupling confining pressure loading, which comprises an abrasive jet flow mechanism, a confining pressure loading mechanism and a hob penetrating mechanism, wherein the abrasive jet flow mechanism comprises a pressurizing part, the pressurizing part is connected with a slurry supply part, the pressurizing part is connected with a jet flow nozzle, a carrier seat is arranged in the confining pressure loading mechanism, a rock sample is placed on the carrier seat, and the hob penetrating mechanism is arranged on the confining pressure loading mechanism. According to the technical scheme, the TBM rock breaking test under the assistance of abrasive jet can be realized by additionally arranging the abrasive jet mechanism, and the confining pressure applied to the periphery of the rock sample can be regulated by arranging the confining pressure loading mechanism, so that the influence on the TBM rock breaking test under the assistance of the abrasive jet under the condition of different confining pressures is researched. Preferably, the pressurizing part comprises a high-pressure resistant cylinder body and a first three-way pipe, wherein the high-pressure resistant cylinder body is internally connected with a floating piston in a matched manner, the high-pressure resistant cylinder body is internally divided into a bottom cavity and a top cavity through the floating piston, the bottom cavity is connected with one end of a first three-way pipe, the other two ends of the first three-way pipe are respectively connected with a first pipeline and a second pipeline, one ends of the first pipeline and the second pipeline, which are far away from the first three-way pipe, are connected with a second container for containing clear water, the first pipeline is sequentially provided with a high-pressure pump and a water supply one-way valve along the direction far away from the second container, and the second pipeline is provided with a drain valve. In the technical scheme, the pressurizing part is used for pressurizing the abrasive slurry entering the top cavity by injecting high-pressure water flow into the bottom cavity and applying pressure into the top cavity through the floating piston. Preferably, the abrasive jet mechanism further comprises a second three-way pipe, one end of the second three-way pipe is communicated with the top cavity, and the other two ends of the second three-way pipe are respectively connected with the slurry supply part and the jet nozzle. Preferably, the slurry supply part comprises a first container for containing the abrasive slurry, one ends of the first container and the second three-way pipe are connected with a third pipeline, and a low-pressure pump and a material supply one-way valve are sequentially arranged on the third pipeline along the direction far away from the first container. In the present embodiment, the slurry supply portion is used to inject the abrasive slurry into the top chamber, and the abrasive slurry is pressuriz