Capsule-shaped environment simulation body structure for Hopkinson bar test system

Abstract

The present invention discloses a sac-shaped environment simulation body structure for a Hopkinson bar test system, wherein a first shell and a second shell are provided, and a confining pressure annular cavity for applying confining pressure and a first osmotic pressure annular cavity for applying osmotic pressure are provided in the first shell, a second osmotic pressure annular cavity for applying osmotic pressure is provided in the second shell, and an incident rod and a transmission rod for applying axial pressure and impact load to a rock mass are connected in the first shell and the second shell. The present invention is improved based on a traditional one-dimensional Hopkinson bar device, and through the sac-shaped environment simulation body structure for a Hopkinson bar test system in the present invention, an impact dynamic test of a rock mass under the coupling of a prestressed field and an osmotic pressure field can be carried out, solving the technical problem that it is difficult for existing dynamic equipment to realize a dynamic mechanical response test of a rock mass under high prestress and high osmotic pressure in a real environment.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil body dynamics testing, and in particular to a sac-shaped environment simulation body structure used for a Hopkinson bar testing system. Background Art

[0002] As underground space development tends to go deeper, deep rock masses are often found in deep environments with high geostress and high osmotic pressure. In the process of deep engineering development, they are easily affected by adverse conditions such as near-field earthquakes, excavation blasting and rock bursts. Underground engineering disasters occur frequently, seriously affecting the safety and stability of the project. Therefore, studying the dynamic mechanical response mechanism of rock masses under high stress and high osmotic pressure has very important theoretical value and engineering significance.

[0003] The split Hopkinson bar is the most widely used loading test equipment for studying material dynamics under medium and high strain rates. However, at present, domestic and foreign scholars have relatively little discussion on the dynamic performance of materials under high prestress and high osmotic pressure. Most of the existing studies are based on the split Hopkinson bar to carry out axial pressure and temperature coupling, axial pressure and confining pressure coupling, and impact dynamic characteristics of different types of rocks under a single different water content state or different axial confining pressure. However, the research lacks consideration of the deep real existence environment of the rock mass. This is mainly because the existing technology cannot achieve high pre-static pressure loading or coupled loading of seepage water pressure, which in turn causes a gap in the research direction of scientific problems such as the degradation of the dynamic performance of the rock mass under high stress and high osmotic pressure. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a sac-shaped environmental simulation body structure for a Hopkinson bar testing system, which can simulate the extreme environment of high stress and high osmotic pressure acting on the rock mass, thereby solving the gap in research direction for scientific problems such as the degradation of the dynamic performance of the rock mass under high stress and high osmotic pressure caused by the inability of the Hopkinson bar in the prior art to couple high prestress and seepage water pressure loading.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] Provided is a sac-shaped environment simulation body structure for a Hopkinson bar test system, comprising a first shell and a second shell fixedly connected to the end surface of the first shell; a confining pressure annular cavity and a first osmotic pressure annular cavity for placing a rock mass to be tested are arranged inside the first shell; a pressurized oil pipeline and a pressure relief oil pipeline communicating with the confining pressure annular cavity are arranged on the first shell; a first pressurized water pipeline and a second pressurized water pipeline communicating with the first osmotic pressure annular cavity are arranged on the first shell;

[0007] A second osmotic pressure annular cavity is arranged inside the second shell, the first osmotic pressure annular cavity is symmetrically arranged with the osmotic pressure annular cavity, and a first pressure relief water pipeline and a second pressure relief water pipeline connected with the second osmotic pressure annular cavity are arranged on the second shell; the confining pressure annular cavity is located between the first osmotic pressure annular cavity and the second osmotic pressure annular cavity; a circular channel is penetrated in the middle of the first shell and the second shell, and an incident rod and a transmission rod are arranged in the circular channel, and the incident rod and the transmission rod are used to apply axial pressure and impact load to the rock mass to be measured.

[0008] The basic principle of the present invention is as follows: a confining pressure annular cavity and a first osmotic pressure annular cavity are arranged in a first shell, and a second osmotic pressure annular cavity is arranged in a second shell; during the test, a confining pressure source medium is injected into the confining pressure annular cavity through a pressurized oil pipeline and a pressure relief oil pipeline, thereby applying confining pressure to the rock mass to be tested; a permeable medium is injected into the first osmotic pressure annular cavity and the second osmotic pressure annular cavity, and a uniform permeable water pressure is formed on the rock mass to be tested by adjusting the pressurized and pressure relief water pipelines; and an axial pressure and an impact load are applied to the rock mass to be tested through the incident rod and the transmission rod and the two end face foundations of the rock mass to be tested; the sac-shaped environmental simulation body structure used for the Hopkinson rod test system of the present invention can carry out impact dynamics tests under the coupling of prestressed field and osmotic pressure field, solving the technical problem that the existing dynamic equipment is difficult to realize the dynamic mechanical response test under high prestress and high osmotic pressure in the real environment of the rock mass.

[0009] Furthermore, an annular oil bladder is arranged in the confining pressure annular cavity, and the circumferential outer wall of the annular oil bladder is fixedly connected to the circumferential wall of the confining pressure annular cavity; the pressurized oil pipeline and the pressure relief oil pipeline are connected to the annular oil bladder; the rock mass to be tested is in a cylindrical structure, and the rock mass to be tested is arranged at the center position of the inner ring of the annular oil bladder; the confining pressure source medium is injected into the annular oil bladder through the pressurized oil pipeline and the pressure relief oil pipeline, and the annular oil bladder expands under the action of the confining pressure source medium, and applies confining pressure to the rock mass to be tested. Because the confining pressure source medium applies confining pressure to the rock mass through the annular oil bladder, leakage of the confining pressure source medium is avoided, the confining pressure is stable, and the accuracy of rock mass testing is improved.

[0010] Furthermore, a rubber sleeve with a hollow cylindrical structure is provided in the confining pressure annular cavity. The rubber sleeve is used to be sleeved on the circumferential outer wall of the rock mass to be measured. The rubber sleeve can increase the friction between the rock mass to be measured and the annular oil bag, so that the fixed connection between the rock mass to be measured and the annular oil bag is stable, and at the same time, the annular oil bag is prevented from being punctured due to rock crushing; the length of the rubber sleeve is equal to that of the rock mass to be measured, and the rock mass to be measured is arranged in the rubber sleeve, and the ends of the incident rod and the transmission rod are respectively in contact with the two end faces of the rock mass to be measured, and the circumferential outer wall of the rock mass to be measured is always in contact with the circumferential inner wall of the rubber sleeve, so that the confining pressure source medium applies confining pressure to the circumferential outer wall of the rock mass to be measured through the rubber sleeve.

[0011] Furthermore, a guide ring with a hollow cylindrical structure is arranged between the annular oil sac and the incident rod and the transmission rod, the two ends of the guide ring are respectively connected to the first osmotic pressure annular cavity and the second osmotic pressure annular cavity, the circumferential outer wall of the guide ring is in contact with the inner ring wall of the annular oil sac, and a plurality of guide grooves are arranged on the circumferential inner wall of the guide ring, each guide groove is arranged along the length direction of the guide ring, and the two ends of each guide groove respectively penetrate the two end faces of the guide ring; a gap is arranged between the circular channel and the incident rod and the transmission rod, and each guide groove is connected to the first osmotic pressure annular cavity and the second osmotic pressure annular cavity through the gap; when the osmotic pressure simulation test is carried out on the rock mass to be tested, the guide groove of the guide ring will guide the permeable medium along the rod surface of the incident rod and the transmission rod into the interior of the rock to be tested, so as to realize the loading of the osmotic water pressure or the pore water pressure. At the same time, the guide ring and the rubber sleeve together form an adaptive ring, which can prevent the measured rock mass from moving randomly during the installation process, play a positioning role, ensure the correct installation position of the measured rock mass, and enable the osmotic pressure loading to proceed smoothly.

[0012] Furthermore, as a setting of the specific positions of the incident rod and the transmission rod, a transmission rod is arranged in the circumferential channel of the first shell; an incident rod is arranged in the circumferential channel of the second shell, and the ends of the incident rod and the transmission rod pass through the guide ring and contact the end faces of the rock mass to be measured.

[0013] Furthermore, seals are provided in the circular channels of the first shell and the second shell. The seal located in the circular channel of the first shell is located on the side of the first osmotic pressure annular cavity away from the confining pressure annular cavity; the seal located in the circular channel of the second shell is located on the side of the second osmotic pressure annular cavity away from the confining pressure annular cavity; the seals include a dust ring, a sealing ring and a Tess seal.

[0014] The incident rod and the transmission rod cooperate with the seal; if there is no seal, when the rock mass to be tested is impacted or the annular oil bag is damaged, the permeable medium or the confining pressure source medium may leak through the gap between the circular channel and the incident rod and the transmission rod, and the dynamic seal cooperates with the circumferential outer wall of the incident rod and the transmission rod to block the gap for the flow of the permeable medium and the confining pressure source medium, reduce and avoid the outflow of the permeable medium and the confining pressure source medium, play an insurance role, stabilize the permeable pressure and confining pressure of the rock mass to be tested, ensure the success rate of the test, and improve the accuracy of the test of the rock mass to be tested.

[0015] Furthermore, the second shell is connected to the first shell via the first screw, thereby achieving a detachable connection between the first shell and the second shell.

[0016] Further, the outer end surfaces of the first shell and the second shell are both provided with connecting protrusions, and the two connecting protrusions are both provided with circular channels for the incident rod and the transmission rod to pass through, and each connecting protrusion is connected to a sealing cover through a second screw, and the middle parts of the two sealing covers are provided with circular channels for the incident rod and the transmission rod to pass through, and the circular channels in the two sealing covers are provided with O-type sealing rings for matching with the incident rod and the transmission rod. The O-type sealing ring is equivalent to a double seal, and when the seal fails, the O-type sealing ring can prevent the leakage of the permeation medium and the confining pressure source medium.

[0017] The above device is used for testing. The specific method is as follows:

[0018] Before the test begins, remove the first screw, push the incident rod to separate the first shell from the second shell, assemble the adaptive ring, place the cylindrical rock mass to be tested in the rubber sleeve, then connect the guide rings on both sides from the end faces of the rubber sleeve, insert the incident rod and the transmission rod into the guide rings on both sides until the end faces of the incident rod and the transmission rod contact the two end faces of the rock mass to be tested, push the assembled adaptive ring into the annular oil bag of the Hopkinson rod confining pressure test device, use the incident rod and the transmission rod to clamp the rock mass to be tested, close the first shell and the second shell, connect the first screw, complete the sample assembly, and start the test.

[0019] The beneficial effects of the present invention are as follows: 1. The sac-shaped environment simulation body structure for the Hopkinson bar test system of the present invention, by providing a confining pressure annular cavity, a first osmotic pressure annular cavity, a second osmotic pressure annular cavity, an incident rod and a transmission rod, respectively applies confining pressure, osmotic pressure, axial pressure and impact load to the rock mass to be tested, and can carry out impact dynamics tests of the rock mass under the coupling of prestress field and osmotic pressure field, thus solving the technical problem that the existing dynamic equipment is difficult to realize the dynamic mechanical response test of the rock mass under high prestress and high osmotic pressure in the real environment.

[0020] 2. An annular oil bag is provided in the confining pressure annular cavity, and confining pressure is applied to the rock mass through the annular oil bag, which will not cause leakage of the confining pressure source medium, and the confining pressure is stable, thereby improving the accuracy of the rock mass test; at the same time, a rubber sleeve is provided on the rock mass to be tested, and the rubber sleeve can increase the friction between the rock mass to be tested and the annular oil bag, so that the fixed connection between the rock mass to be tested and the annular oil bag is stable, and the test result of the confining pressure test is more accurate, and the annular oil bag is protected.

[0021] 3. A guide ring with a hollow cylindrical structure is also arranged between the annular oil bag and the incident rod and the transmission rod. The guide groove of the guide ring will guide the permeable medium along the rod surface of the incident rod and the transmission rod into the interior of the rock to be tested, so as to load the permeable water pressure or pore water pressure. At the same time, the guide ring and the rubber sleeve together form an adaptive ring, which can prevent the tested rock mass from moving randomly during the installation process, play a positioning role, ensure the correct installation position of the tested rock mass, and make the test go smoothly.

[0022] 4. Seals are provided in the circular channels of the first shell and the second shell. The seals are used to block the gaps through which the permeable medium and the confining pressure source medium flow, avoid leakage of the permeable medium and the confining pressure source medium, maintain the stability of the permeable pressure and the confining pressure, and ensure the success rate of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a side view schematic diagram of the environmental simulation body structure used in the Hopkinson bar test system.

[0024] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the AA direction.

[0025] Figure 3 It is a schematic diagram of the installation structure of the rubber sleeve and the sealing spacer.

[0026] Among them, 1. the first shell; 2. the second shell; 3. the confining pressure annular cavity; 4. the first osmotic pressure annular cavity; 5. the pressurized oil pipeline; 6. the pressure relief oil pipeline; 7. the first pressurized water pipeline; 8. the second pressurized water pipeline; 9. the second osmotic pressure annular cavity; 10. the first pressure relief water pipeline; 11. the second pressure relief water pipeline; 12. the incident rod; 13. the transmission rod; 14. the annular oil bag; 15. the rubber sleeve; 16. the guide ring; 17. the guide groove; 18. the dust ring; 19. the sealing ring; 20. the Tes seal; 21. the connecting protrusion; 22. the sealing cover; 23. the second screw; 24. the O-ring; 25. the rock mass to be measured; 26. the first screw. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0028] Example 1

[0029] like Figures 1-2As shown, the present invention provides a sac-shaped environment simulation body structure for a Hopkinson bar test system, which includes a first shell 1 and a second shell 2 fixedly connected to the end face of the first shell 1. Preferably, a plurality of first bolts 26 are evenly arranged circumferentially around the axis of the second shell 2, and the second shell 2 is connected to the first shell 1 through the first screw 26, so as to realize the detachable connection between the first shell 1 and the second shell 2. A confining pressure annular cavity 3 and a first osmotic pressure annular cavity 4 for placing the rock mass 25 to be tested are arranged inside the first shell 1; a pressurized oil pipeline 5 and a pressure relief oil pipeline 6 communicating with the confining pressure annular cavity 3 are arranged on the first shell 1; a first pressurized water pipeline 7 and a second pressurized water pipeline 8 communicating with the first osmotic pressure annular cavity 4 are arranged on the first shell 1.

[0030] A second osmotic pressure annular cavity 9 is arranged inside the second shell 2, and the first osmotic pressure annular cavity 4 is symmetrically arranged with the osmotic pressure annular cavity. A first pressure relief water pipeline 10 and a second pressure relief water pipeline 11 connected with the second osmotic pressure annular cavity 9 are arranged on the second shell 2; the confining pressure annular cavity 3 is located between the first osmotic pressure annular cavity 4 and the second osmotic pressure annular cavity 9; a circular channel is penetrated in the middle of the first shell 1 and the second shell 2, and an incident rod 12 and a transmission rod 13 are arranged in the circular channel, and the incident rod 12 and the transmission rod 13 are used to apply axial pressure and impact load to the rock mass 25 to be measured.

[0031] As a specific arrangement of the incident rod 12 and the transmission rod 13, the transmission rod 13 is arranged in the circumferential channel of the first shell 1; the incident rod 12 is arranged in the circumferential channel of the second shell 2, and the ends of the incident rod 12 and the transmission rod 13 pass through the guide ring 16 and contact the end faces of the rock mass 25 to be measured.

[0032] A confining pressure annular cavity 3 and a first osmotic pressure annular cavity 4 are arranged in the first shell 1, and a second osmotic pressure annular cavity 9 is arranged in the second shell 2. During the test, a confining pressure source medium is injected into the confining pressure annular cavity 3 through a pressurized oil pipeline 5 and a pressure relief oil pipeline 6, thereby applying confining pressure to the rock mass 25 to be tested; a permeable medium is injected into the first osmotic pressure annular cavity 4, and the permeable medium flows into the second osmotic pressure annular cavity 9 through a guide ring 16 and the rock mass 25 to be tested, so as to apply osmotic water pressure to the rock mass 25 to be tested; and an axial pressure and an impact load are applied to the rock mass 25 to be tested through the end face foundations of the incident rod 12 and the transmission rod 13 and the two ends of the rock mass 25 to be tested. The sac-shaped environmental simulation body structure used for the Hopkinson rod test system of the present invention can carry out impact dynamic tests under the coupling of prestressed field and osmotic pressure field, thereby solving the technical problem that the existing dynamic equipment is difficult to realize the dynamic mechanical response test under high prestress and high osmotic pressure in the real environment of the rock mass.

[0033] Example 2

[0034] like Figures 1 to 3As shown, this embodiment is further limited on the basis of implementation 1, an annular oil bladder 14 is provided in the confining pressure annular cavity 3, and the circumferential outer wall of the annular oil bladder 14 is fixedly connected to the circumferential wall of the confining pressure annular cavity 3; the pressurized oil pipeline 5 and the pressure relief oil pipeline 6 are connected to the annular oil bladder 14; the rock mass 25 to be tested is in a cylindrical structure, and the rock mass 25 to be tested is arranged at the inner ring position of the annular oil bladder 14; the confining pressure source medium is injected into the annular oil bladder 14 through the pressurized oil pipeline 5 and the pressure relief oil pipeline 6, and the annular oil bladder 14 expands under the action of the confining pressure source medium, and applies confining pressure to the rock mass 25 to be tested. Because the confining pressure source medium applies confining pressure to the rock mass through the annular oil bladder 14, leakage of the confining pressure source medium is avoided, the confining pressure is stable, and the accuracy of the rock mass test is improved.

[0035] A rubber sleeve 15 with a hollow cylindrical structure is provided in the confining pressure annular cavity 3. The rubber sleeve 15 is used to be sleeved on the circumferential outer wall of the rock mass 25 to be measured. The rubber sleeve 15 can increase the friction between the rock mass 25 to be measured and the annular oil bag 14, so that the fixed connection between the rock mass 25 to be measured and the annular oil bag 14 is stable, and at the same time, the annular oil bag 14 is prevented from being punctured due to rock crushing; the length of the rubber sleeve 15 is equal to that of the rock mass 25 to be measured, and the rock mass 25 to be measured is arranged in the rubber sleeve 15, and the ends of the incident rod 12 and the transmission rod 13 are respectively in contact with the end faces of both ends of the rock mass 25 to be measured, and the circumferential outer wall of the rock mass 25 to be measured is always in contact with the circumferential inner wall of the rubber sleeve 15, so that the confining pressure source medium applies confining pressure to the circumferential outer wall of the rock mass 25 to be measured through the rubber sleeve 15.

[0036] A guide ring 16 with a hollow cylindrical structure is also arranged between the annular oil sac 14 and the incident rod 12 and the transmission rod 13. The guide ring 16 can be formed by rolling a thin aluminum plate or a thin stainless steel plate. The two ends of the guide ring 16 are respectively connected to the first osmotic pressure annular cavity 4 and the second osmotic pressure annular cavity 9. The circumferential outer wall of the guide ring 16 is in contact with the inner ring wall of the annular oil sac 14. A plurality of guide grooves 17 are arranged on the circumferential inner wall of the guide ring 16. Each guide groove 17 is arranged along the length direction of the guide ring 16. The two ends of each guide groove 17 respectively penetrate the two end faces of the guide ring 16. The circular channel is connected to the incident rod 1 2 and the transmission rod 13 are provided with a gap, and each guide groove 17 is connected with the first osmotic pressure annular cavity 4 and the second osmotic pressure annular cavity 9 respectively through the gap; when the osmotic pressure simulation test is performed on the rock mass 25 to be tested, the permeable medium is injected into the first osmotic pressure annular cavity 4 and the second osmotic pressure annular cavity 9, and the permeable medium first connects with the end faces of the two ends of the guide ring 16, and then the permeable medium flows into the guide groove 17, and the guide groove 17 of the guide ring 16 will guide the permeable medium along the rod surface of the incident rod 12 and the transmission rod 13 into the interior of the rock to be tested, so as to realize the loading of the osmotic water pressure or the pore water pressure. At the same time, the guide ring 16 and the rubber sleeve 15 together form an adaptive ring, which can realize that the rock mass 25 to be tested will not move at will during the installation process, play a positioning role, ensure that the installation position of the rock mass 25 to be tested is correct, and make the osmotic pressure loading proceed smoothly.

[0037] Example 3

[0038] This embodiment is further limited on the basis of Embodiment 2, and seals are provided in the circular channels of the first shell 1 and the second shell 2. The seal located in the circular channel of the first shell 1 is located on the side of the first osmotic pressure annular chamber 4 away from the confining pressure annular chamber 3; the seal located in the circular channel of the second shell 2 is located on the side of the second osmotic pressure annular chamber 9 away from the confining pressure annular chamber 3; the seals include a dust ring 18, a sealing ring 19 and a Tess seal 20.

[0039] The incident rod 12 and the transmission rod 13 cooperate with the seal; if there is no seal, when the rock mass 25 to be tested is impacted, or the annular oil bag 14 is damaged, the permeable medium or the confining pressure source medium may leak through the gap between the circular channel and the incident rod 12 and the transmission rod 13, and the dynamic seal cooperates with the circumferential outer wall of the incident rod 12 and the transmission rod 13 to block the gap for the flow of the permeable medium and the confining pressure source medium, reduce and avoid the outflow of the permeable medium and the confining pressure source medium of the rock mass 25 to be tested, play an insurance role, stabilize the permeable pressure and confining pressure of the rock mass 25 to be tested, ensure the success rate of the test, and improve the accuracy of the test of the rock mass 25 to be tested. The outer end surfaces of the first shell 1 and the second shell 2 are both provided with connecting protrusions 21, and the two connecting protrusions 21 are both provided with circular channels for the incident rod 12 and the transmission rod 13 to pass through. Each connecting protrusion 21 is connected to a sealing cover 22 through a second screw 23, and the middle parts of the two sealing covers 22 are provided with circular channels for the incident rod 12 and the transmission rod 13 to pass through, and the circular channels in the two sealing covers 22 are provided with O-type sealing rings 24 for matching with the incident rod 12 and the transmission rod 13. The O-type sealing ring 24 is equivalent to a double seal, and when the seal fails, the O-type sealing ring 24 can prevent the leakage of the permeation medium and the confining pressure source medium.

[0040] The above device is used for testing. The specific method is as follows:

[0041] Before the test begins, remove the first screw 26, push the incident rod 12 to separate the first shell 1 from the second shell 2, assemble the adaptive ring, place the cylindrical rock mass 25 to be tested in the rubber sleeve 15, and then connect the guide rings 16 on both sides from the end faces of the rubber sleeve 15, insert the incident rod 12 and the transmission rod 13 into the guide rings 16 on both sides until the end faces of the incident rod 12 and the transmission rod 13 contact the two end faces of the rock mass 25 to be tested, push the assembled adaptive ring into the annular oil bag 14 of the Hopkinson bar confining pressure test device, use the incident rod 12 and the transmission rod 13 to clamp the rock mass 25 to be tested, close the first shell 1 and the second shell 2, connect the first screw 26, complete the sample assembly, and start the test.

Claims

1. A capsule-shaped environment simulation body structure for a Hopkinson bar test system, characterized in that: It comprises a first shell and a second shell fixedly connected to the end surface of the first shell; The first shell is provided with a confining pressure annular cavity and a first osmotic pressure annular cavity for placing the rock mass to be measured; the first shell is provided with a pressurized oil pipeline and a pressure relief oil pipeline connected with the confining pressure annular cavity; The first shell is provided with a first pressurized water pipeline and a second pressurized pipeline communicating with the first osmotic pressure annular cavity; A second osmotic pressure annular cavity is arranged inside the second shell, the first osmotic pressure annular cavity and the second osmotic pressure annular cavity are arranged symmetrically, and a first pressure relief water pipeline and a second pressure relief water pipeline communicating with the second osmotic pressure annular cavity are arranged on the second shell; the confining pressure annular cavity is located between the first osmotic pressure annular cavity and the second osmotic pressure annular cavity; A circular channel is provided through the middle of the first shell and the second shell, and an incident rod and a transmission rod are provided in the circular channel, and the incident rod and the transmission rod are used to apply axial pressure and impact load to the rock mass to be measured; An annular oil bag is arranged in the confining pressure annular cavity, and the circumferential outer wall of the annular oil bag is fixedly connected to the circumferential wall of the confining pressure annular cavity; the pressurized oil pipeline and the pressure relief oil pipeline are connected to the annular oil bag; the rock mass to be measured is a cylindrical structure, and the rock mass to be measured is arranged at the inner ring position of the annular oil bag; A rubber sleeve in a hollow cylindrical structure is arranged in the confining pressure annular cavity, and the rubber sleeve is used to be sleeved on the circumferential outer wall of the rock mass to be measured, and the rubber sleeve is equal in length to the rock mass to be measured; A guide ring with a hollow cylindrical structure is also arranged between the annular oil sac and the incident rod and the transmission rod. The two ends of the guide ring are respectively connected to the first osmotic pressure annular cavity and the second osmotic pressure annular cavity. The circumferential outer wall of the guide ring is in contact with the inner ring wall and the shell of the annular oil sac. A plurality of guide grooves are arranged on the circumferential inner wall of the guide ring. Each of the guide grooves is arranged along the length direction of the guide ring. The two ends of each guide groove respectively penetrate the end faces of the guide ring. A gap is arranged between the circular channel and the incident rod and the transmission rod. Each guide groove is connected to the first osmotic pressure annular cavity and the second osmotic pressure annular cavity through the gap.

2. The sac-shaped environment simulation body structure for the Hopkinson bar test system according to claim 1, characterized in that: The incident rod is arranged in the circumferential channel of the first shell; the transmission rod is arranged in the circumferential channel of the second shell, and the ends of the incident rod and the transmission rod pass through the guide ring and contact the end faces of the rock mass to be measured.

3. The sac-shaped environment simulation body structure for the Hopkinson bar test system according to claim 1, characterized in that: The circular channels of the first shell and the second shell are both provided with sealing members, and the sealing member located in the circular channel of the first shell is located on a side of the first osmotic pressure annular cavity away from the confining pressure annular cavity; The sealing member located in the circular channel of the second shell is located on the side of the second osmotic pressure annular cavity away from the confining pressure annular cavity; the sealing member includes a dust ring, a sealing ring and a Tess seal.

4. The sac-shaped environment simulation body structure for the Hopkinson bar test system according to claim 1, characterized in that: The second shell is connected to the first shell through a first screw.

5. The sac-shaped environment simulation body structure for the Hopkinson bar test system according to any one of claims 1 to 4, characterized in that: The outer end surfaces of the first shell and the second shell are both provided with connecting protrusions, and the two connecting protrusions are both provided with circular channels for the incident rod and the transmission rod to pass through. Each connecting protrusion is connected to a sealing cover through a second screw rod, and the middle parts of the two sealing covers are provided with circular channels for the incident rod and the transmission rod to pass through, and the circular channels in the two sealing covers are provided with O-rings for cooperating with the incident rod and the transmission rod.

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