CN112627867A

CN112627867A - Hydraulic support double-cavity upright column jack structure and energy-absorbing impact-resistant constant-resistance method thereof

Info

Publication number: CN112627867A
Application number: CN202011636813.1A
Authority: CN
Inventors: 陈连军; 张治高
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-04-09

Abstract

The invention relates to the technical field of rock burst prevention and control, in particular to a hydraulic support double-cavity upright post jack structure and an energy-absorbing impact-resistant constant-resistance method thereof. A movable column of the hydraulic support double-cavity upright post jack structure is inserted in a cavity of the outer cylinder, and the lower end of the movable column divides the cavity into an upper cavity and a lower cavity; a piston is arranged in the lower cavity, and the piston divides the lower cavity into a liquid storage cavity and a buffer cavity; the liquid storage cavity is positioned at one side close to the movable column; the buffer cavity is located the piston lower part and is provided with the elastomeric element with piston looks butt in the buffer cavity, and elastomeric element can maintain the stability in stock solution chamber under the normal state, and when bearing impact load, elastomeric element can compress, and impact load release back, elastomeric element can reset. The upright post jack can instantaneously give pressure when bearing impact load, and the problem of support damage caused by the fact that the conventional safety valve cannot instantaneously release pressure is solved; after the impact load is released, the upright post jack can recover the support strength, constant-resistance support of the top plate is realized, and the safety of the top plate is improved.

Description

Hydraulic support double-cavity upright column jack structure and energy-absorbing impact-resistant constant-resistance method thereof

Technical Field

The invention relates to the field of rock burst prevention and control, in particular to a hydraulic support double-cavity upright post jack structure and an energy-absorbing impact-resistant constant-resistance method thereof.

Background

In the prior art, a unit type forepoling hydraulic support becomes a standard forepoling form of a rock burst mine, and compared with other support forms, the support strength, the stability and the shock resistance are greatly improved. At present, the unloading yielding function of all the supports is realized by opening and releasing liquid through safety valves on a stand column hydraulic system, and a certain time is required from the opening to the liquid releasing of the safety valves. When rock burst occurs, huge impact load is instantly transmitted to the safety valve through the bracket, and the bracket cannot realize yielding through a hydraulic system to become a rigid structure because the safety valve cannot instantly release liquid and release pressure, so that all supporting and bracket structural members are damaged when the rock burst occurs. Namely, the safety valve of the upright jack which is used as the main working component of the bracket does not have the function of releasing liquid instantly and releasing pressure, so that the problems of upright breaking, bracket toppling, top beam breakdown, bottom support damage and the like are caused when rock burst occurs, and the frequent occurrence of injury accidents is caused.

Aiming at the problems, the prior art adopts an energy-absorbing core yielding technology, which is the only impact-resistant technology capable of realizing mechanical yielding through an external structure of a stand column hydraulic system at present. After the energy-absorbing core technology is applied to the bracket, the energy-absorbing core can be mechanically compressed when rock burst occurs, and the energy-absorbing core deforms to realize energy absorption, so that the effects of resisting impact and protecting the bracket structure are achieved.

For example, chinese patent with application number CN201921113811.7, provides a corrugated constant-resistance energy absorption device, which is a specific energy absorption core structure and specifically discloses that the energy absorption device is a multi-surface shell structure, the shell is provided with closed corrugated lines, which include concave and convex circular arc corrugated lines, the concave circular arc corrugated lines and the convex circular arc corrugated lines are alternately arranged on the closed corrugated lines, and the diameter of the circumscribed circle of all the convex circular arc corrugated lines on the outer side surface of the shell is larger than the diameter of the circumscribed circle of the upper end surface and the lower end surface of the shell; the upper side and the lower side of the outer convex arc crease line are respectively provided with an upper arc convex surface and a lower arc convex surface, the upper side and the lower side of the inner concave arc crease line are respectively provided with an upper arc concave surface and a lower arc concave surface, and the upper arc convex surface and the upper arc concave surface and the lower arc convex surface are respectively connected through arc transition, so that the upper end surface and the lower end surface of the shell are in a circular corrugated structure.

Although the energy absorption device can play a role in yielding when rock burst occurs, the energy absorption device can play some protection roles on the stand column and the support. However, the existing energy-absorbing core yielding technology has the following problems that constant-resistance support cannot be realized because the energy-absorbing core cannot be recovered after being compressed, and part of the strength of the stand column is lost because the energy-absorbing core is an external structure which is arranged at the bottom of the stand column of the bracket through an extending stand column. In addition, the energy-absorbing core can be severely damaged when being compressed and damaged, sparks are easily generated, another disaster threat is generated, an anti-explosion shell needs to be additionally arranged outside the energy-absorbing core during manufacturing, the process is complex, and the reusability is low.

Disclosure of Invention

The first purpose of the invention is to provide a hydraulic support double-cavity upright post jack structure which can solve the problems of low strength, poor safety, complex process and low reusability in the prior art;

another objective of the present invention is to provide an energy-absorbing impact-resistant constant-resistance method, which uses the hydraulic support dual-cavity column jack structure as described above.

The invention provides a jack structure of a hydraulic support double-cavity upright post, which comprises an outer cylinder and a plunger;

the movable column is inserted into the cavity of the outer cylinder, the lower end of the movable column is hermetically connected with the cavity, and the cavity is divided into an upper cavity and a lower cavity by the lower end of the movable column;

a piston is arranged in the lower cavity, and the piston divides the lower cavity into a liquid storage cavity and a buffer cavity;

the liquid storage cavity is positioned at one side close to the movable column;

the buffer cavity is located on the lower portion of the piston, an elastic component which is abutted to the piston is arranged in the buffer cavity, the elastic component can maintain the stability of the liquid storage cavity in a normal state, when the elastic component bears impact load, the elastic component can be compressed, and after the impact load is released, the elastic component can reset.

Preferably, the lower end of the plunger is provided with a plunger composite sealing ring, and the plunger is connected with the cavity in a sealing manner through the plunger composite sealing ring.

Preferably, the lower part of the liquid storage cavity is provided with a liquid discharge hole, and the liquid discharge hole is provided with a safety valve.

Preferably, the upper chamber and the lower chamber are both provided with hydraulic oil holes, and the hydraulic oil holes are provided with threaded joints.

Preferably, the elastic member is a spring.

Preferably, the elastic member is a belleville spring.

Preferably, the lower end of the piston is provided with a stable nail, the upper end of the belleville spring is sleeved in the stable nail, and the lower end of the belleville spring is abutted to the bottom surface of the lower cavity.

Preferably, the lower end of the buffer cavity is provided with an explosion-proof hole.

Preferably, the upper end of the buffer cavity is provided with a limiting part, and a channel for communicating the liquid storage cavity and the buffer cavity is arranged on the limiting part;

the piston is arranged at the lower part of the limiting part to prevent the piston from entering the liquid storage cavity.

Preferably, a piston composite sealing ring is arranged on the outer side of the piston.

The energy-absorbing impact-resistant constant-resistance method adopts the hydraulic support double-cavity upright post jack structure and comprises the following steps:

a hydraulic support double-cavity upright column jack structure is used on the hydraulic support;

when the hydraulic support is in a normal supporting state, the elastic component maintains the stability of the liquid storage cavity;

when the hydraulic support is subjected to impact load, the impact force is transmitted to the liquid storage cavity by the plunger, liquid in the liquid storage cavity pushes the piston to move, and the piston compresses the elastic component to realize energy absorption and pressure yielding;

after the impact load is released, the elastic component resets to jack the piston, energy is transferred to the plunger through the liquid storage cavity, and the plunger recovers to support, so that constant resistance is realized.

Has the advantages that:

on the basis of the existing upright post, the lower cavity is divided into the liquid storage cavity and the buffer cavity by the piston, and the elastic part is arranged in the buffer cavity. Compared with the prior art, the hydraulic support has the functions of instantaneous yielding and constant resistance in the rock burst generation process. In the twinkling of an eye takes place for rock burst, roof impact load passes through the plunger and transmits to the piston, and then through elastomeric element's compression, realizes the instantaneous pressure of letting down, has effectively solved the support damage difficult problem that current relief valve can't instantaneous release lead to the fact.

After the impact load is released, the elastic part recovers the original state instantly, the piston is pushed to move upwards, the plunger is jacked up by means of the liquid storage cavity hydraulic oil, the jack recovers the work again, the support strength is recovered, constant-resistance support for the top plate is achieved, and the safety of the top plate is improved. The problem of in the current energy-absorbing core lets the pressure technique, the energy-absorbing core can't recover after the compression and can't realize the constant resistance and support is solved.

In addition, the upright post jack provided by the embodiment only needs to add the piston in the lower cavity of the upright post to divide the lower cavity into the liquid storage cavity and the buffer cavity, the elastic component is arranged in the buffer cavity, and the newly added structure is arranged in the upright post jack, so that the problem that the structural strength of the upright post is reduced because the energy absorption core is externally connected to the outer part of the jack structure is solved. The integral strength of the upright post jack structure is guaranteed, an external hydraulic pipeline system is not required to be added, the structure is simple, the safety is higher, and the intrinsic safety characteristic is achieved.

Finally, the functions of energy absorption, yielding and constant resistance are realized by compressing and resetting the elastic component in the embodiment, and the process is relatively gentle compared with yielding of the energy absorption core and can be repeatedly utilized. The problems that in the existing energy-absorbing core technology, the energy-absorbing core is severely damaged when being compressed and damaged, sparks are easily generated, an anti-explosion shell needs to be additionally added, and the process is complex and the reusability is low are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a hydraulic support dual-cavity column jack structure according to an embodiment of the present invention.

Description of reference numerals:

1: an outer cylinder; 2: a plunger; 3: an upper chamber; 4: a lower cavity; 5: a piston; 6: a liquid storage cavity; 7: a buffer chamber; 8: an elastic member; 9: a plunger composite sealing ring; 10: a drain hole; 11: a safety valve; 12: a hydraulic oil hole; 13: a threaded joint; 14: stabilizing the nail; 15: an explosion-proof hole; 16: a limiting part; 17: the piston is combined with a sealing ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, in the present embodiment, there is provided a hydraulic support dual chamber column jack structure, which includes an outer cylinder 1 and a plunger 2.

The plunger 2 is inserted in the cavity of the outer cylinder 1, the lower end of the plunger 2 is hermetically connected with the cavity, and the cavity is divided into an upper cavity 3 and a lower cavity 4 by the lower end of the plunger 2. Here, the lower end of the plunger 2 is connected with the cavity in a sealing manner, specifically, the lower end of the plunger 2 is connected with the cavity in a sliding sealing manner.

A piston 5 is arranged in the lower cavity 4, and the piston 5 divides the lower cavity 4 into a liquid storage cavity 6 and a buffer cavity 7, so that the lower cavity 4 forms a double-cavity structure.

The liquid storage cavity 6 is positioned at one side close to the plunger 2.

The buffer chamber 7 is located at the lower part of the piston 5, an elastic component 8 abutting against the piston 5 is arranged in the buffer chamber 7, the elastic component 8 can normally maintain the stability of the liquid storage chamber 6, when bearing impact load, the elastic component 8 can be compressed, and after the impact load is released, the elastic component 8 can reset. That is, in a normal state, the elastic member 8 is in a partially compressed state, and after receiving an impact load, the elastic member 8 can continue to be compressed to achieve yielding.

The elastic component 8 can maintain the stability of the liquid storage cavity 6 in a normal state, specifically means that the liquid storage cavity 6, the upper cavity 3 are communicated with a hydraulic pipeline, and the position of the plunger 2 is adjusted by inputting hydraulic oil or returning oil into the liquid storage cavity 6 and the upper cavity 3 through the hydraulic pipeline. In the process of inputting hydraulic oil or returning oil into the liquid storage cavity 6 and the upper cavity 3, the position of the piston 5 is ensured to be unchanged or not greatly changed. Therefore, the liquid storage cavity 6 can be guaranteed to have stable pressure when hydraulic oil is input or oil is returned, the upright column jack is guaranteed to be normally in a supporting state, the self-weight pressure of the top plate is borne, and the stress balance of the roadway is maintained.

When bearing impact load, elastomeric element 8 can compress, specifically indicate, when the support receives the impact dynamic load, the impact force can be transmitted to stock solution chamber 6 through plunger 2, stock solution chamber 6 compresses elastomeric element 8 through piston 5, piston 5 removes to cushion chamber 7 promptly, so, the space in stock solution chamber 6 can the grow, for retraction of plunger 2 provides the operation space, let the pressure has been realized, promptly, when receiving impact load, elastomeric element 8 instantaneous compression energy-absorbing, realize letting the pressure, protection stand and support, the completion energy-absorbing lets the pressure function.

After the impact load is released, the elastic component 8 can reset, specifically, when bearing the impact load, the elastic component 8 is in a compression state, after the impact dynamic load is finished, the elastic component 8 quickly releases elastic energy to push the piston 5 to reset, hydraulic oil entering the buffer cavity 7 returns to the liquid storage cavity 6, the movable column 2 is pushed to restore and support, and the constant-resistance function is realized.

In summary, the dual-cavity upright post jack structure of the hydraulic support provided by the embodiment has the following advantages.

In the embodiment, the lower cavity 4 is divided into the liquid storage cavity 6 and the buffer cavity 7 by the piston 5 on the basis of the existing upright column, and the elastic part 8 is arranged in the buffer cavity 7. Compared with the prior art, the hydraulic support has the functions of instantaneous yielding and constant resistance in the rock burst generation process. In the twinkling of an eye takes place for rock burst, and roof impact load passes through plunger 2, and plunger 2 passes through liquid storage chamber 6 interior hydraulic oil with impact load transmission to piston 5, and then through elastomeric element 8's compression, realizes the instantaneous pressure of letting down, has effectively solved the support damage difficult problem that current relief valve can't instantaneous release caused.

After the impact load is released, the elastic part 8 recovers the original state instantly, the elastic part 8 pushes the piston 5 to move upwards, and the plunger 2 is jacked up by means of the hydraulic oil in the liquid storage cavity 6, so that the jack recovers the work again, the support supporting strength is recovered, constant-resistance supporting of the top plate is realized, and the safety of the top plate is improved. The problem of in the current energy-absorbing core lets the pressure technique, the energy-absorbing core can't recover after the compression and can't realize the constant resistance and support is solved.

In addition, the upright post jack provided by the embodiment only needs to add the piston 5 in the upright post lower cavity 4 to divide the lower cavity 4 into the liquid storage cavity 6 and the buffer cavity 7, the elastic part 8 is arranged in the buffer cavity 7, and the newly added structure is arranged in the upright post jack, so that the problem that the structural strength of the upright post is reduced because the energy absorption core is externally connected to the outer part of the jack structure is solved. The integral strength of the upright post jack structure is guaranteed, an external hydraulic pipeline system is not required to be added, the structure is simple, the safety is higher, and the intrinsic safety characteristic is achieved.

It should be noted that the elastic member 8 mainly depends on the minimum working pressure and the maximum working pressure of the elastic member 8, if the above-described function is to be achieved. Preferably, the minimum working pressure of the elastic member 8 is 41.5Mpa, and the maximum working pressure is not less than 55 Mpa.

The lower end of the plunger 2 is provided with a plunger composite sealing ring 9, and the plunger 2 is hermetically connected with the cavity through the plunger composite sealing ring 9. Through the arrangement of the plunger composite sealing ring 9, a sliding sealing structure is formed between the plunger 2 and the cavity, and an upper cavity 3 and a lower cavity 4 which are relatively independent are formed in the cavity.

The lower part of the liquid storage cavity 6 is provided with a liquid discharge hole 10, and a safety valve 11 is arranged at the liquid discharge hole 10. When the stress in the liquid storage cavity 6 reaches the opening pressure of the safety valve 11, the safety valve 11 is opened to release the pressure.

The relief valve 11 is depressurized in a normal operation state (without receiving an impact load). Under the normal operating condition, what hydraulic support bore is the dead load, if the dead load is too big, relief valve 11 will open, release oil pressure.

As described above, in the present embodiment, the relief valve 11 is configured to release the pressure in the normal operating state, and the cushion chamber 7 is configured to release the pressure when an impact load is applied. The triggering conditions (the opening pressure of the safety valve 11 and the working pressure of the elastic component 8) for the pressure relief of the safety valve 11 and the yielding of the buffer cavity 7 can be set according to actual requirements.

The upper chamber 3 and the lower chamber 4 are each provided with a hydraulic oil hole 12, and a threaded joint 13 is provided at the hydraulic oil hole 12. The hydraulic oil hole 12 is communicated with a hydraulic pipeline through a threaded joint 13, and the hydraulic pipeline conveys hydraulic oil or returns oil to the upper cavity 3 and the lower cavity 4 through the hydraulic oil hole 12, so that the lifting of the plunger 2 is controlled.

The elastic member 8 is a spring. Further, the elastic member 8 is a belleville spring. The minimum working pressure of the belleville spring is 41.5Mpa, and the maximum working pressure is not less than 55 Mpa.

The lower end of the piston 5 is provided with a stable nail 14, the upper end of the belleville spring is sleeved in the stable nail 14, and the lower end of the belleville spring is abutted with the bottom surface of the lower cavity 4.

The stable nail 14 is provided with a columnar protruding structure, the upper end of the belleville spring is provided with a hole-shaped structure, and the columnar protruding structure of the stable nail 14 is inserted into the hole-shaped structure of the belleville spring. This improves the stability of the attachment of the belleville spring.

In the embodiment, the elastic component 8 is a disk spring, and is used as a component for absorbing and releasing energy, mainly, the disk spring can complete instant deformation, absorb energy converted from impact pressure, and simultaneously can transmit the energy to the plunger 2 through the piston 5 to recover supporting force and ensure the supporting strength of the top plate.

In addition, it is only preferable that the elastic member 8 is a belleville spring in the present embodiment, and it is needless to say that it is not excluded that the elastic member is deformed by an external force and returns to its original shape after the external force is removed, for example, a rubber elastic member or the like.

The lower end of the buffer chamber 7 is provided with an explosion-proof hole 15. Through the setting of explosion-proof hole 15, when piston 5 compressed elastomeric element 8, the gas in cushion chamber 7 was discharged by explosion-proof hole 15, avoided appearing the too big problem of pressure in the cushion chamber 7. Of course, if the buffer chamber 7 is provided as a vacuum chamber, the buffer chamber 7 may not be provided with the explosion-proof hole 15.

The upper end of cushion chamber 7 is provided with spacing portion 16, is provided with the passageway of intercommunication stock solution chamber 6 and cushion chamber 7 on the spacing portion 16, and piston 5 sets up in spacing 16 lower parts in order to prevent that piston 5 from getting into stock solution chamber 6.

Specifically, spacing portion 16 can be the spacing ring that sets up in cushion chamber 7 upper end, and the spacing ring sets up with cushion chamber 7 is coaxial, and the internal diameter of spacing ring is less than piston 5's external diameter, so, the spacing ring can form spacing to piston 5, prevents that piston 5 from getting into stock solution chamber 6.

In addition, in order to facilitate the assembly of the limit ring, the limit ring and the outer cylinder 1 are made into an integrated structure.

And a piston composite sealing ring 17 is arranged outside the piston 5. Through the setting of piston composite seal 17, make piston 5 and cavity of resorption 4 form sliding seal structure, and then make stock solution chamber 6 and cushion chamber 7 form two mutually independent cavitys, prevent to let the pressure function inefficacy because of the hydraulic oil entering cushion chamber 7 of stock solution chamber 6 leads to cushion chamber 7.

In the present embodiment, the working resistance that the jack post can bear is not less than 500 KN. The working resistance born by the jack can be selected according to actual needs.

In this embodiment, one buffer chamber 7 is adopted, and in the actual use process, a plurality of buffer chambers 7, such as two buffer chambers 7 and three buffer chambers 7, can also be adopted, and when a plurality of buffer chambers 7 are adopted, the plurality of buffer chambers 7 are sequentially connected in series. In addition, the size of the elastic component 8 can be adjusted according to needs, so that the pressure relief capacity of the upright post jack can be adjusted.

In this embodiment, there is also provided an energy-absorbing impact-resistant constant-resistance method, which uses the hydraulic support dual-cavity column jack structure as described above, and includes the following steps:

In order to further explain the structure of the hydraulic support double-cavity upright post jack, the embodiment also provides a specific use method of the hydraulic support double-cavity upright post jack structure.

The hydraulic support is provided with a hydraulic support double-cavity upright post jack structure, the hydraulic support comprises a support top beam and a support base, and the upright post jack is fixedly connected with the support top beam and the support base through pin shafts.

When the hydraulic support is in a normal supporting state, the self-weight pressure of the top plate is borne, and the stress balance of the roadway is maintained.

When the hydraulic support is subjected to impact force from the upper part and/or the bottom part, the impact force acts on the support top beam and/or the support base, the impact force is transmitted to the liquid storage cavity 6 through the plunger 2, the liquid storage cavity 6 is compressed when the plunger 2 moves downwards, the impact energy continues to compress the piston 5, the piston 5 transfers the impact force to the disc spring, the disc spring is compressed, and gas in the buffer cavity 7 is discharged through the explosion-proof hole 15. After the impact energy is released, the belleville spring recovers the original state, the piston 5 is jacked up, the energy is transmitted to the movable column 2 through the liquid storage cavity 6, the movable column 2 jacks up the top beam of the hydraulic support, the support strength of the hydraulic support is recovered, the hydraulic support is recovered to be in a top-to-bottom state, and then the hydraulic support recovers to the acting force of the top plate and the bottom plate of the roadway to ensure the completeness of the roadway.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A jack structure with a hydraulic support and a double-cavity upright post is characterized by comprising an outer cylinder and a plunger;

the buffer cavity is positioned at the lower part of the piston, an elastic component which is abutted against the piston is arranged in the buffer cavity, the elastic component can maintain the stability of the liquid storage cavity in a normal state, when the elastic component bears impact load, the elastic component can be compressed, and after the impact load is released, the elastic component can reset.

2. The hydraulic support double-cavity upright post jack structure as claimed in claim 1, wherein a plunger composite sealing ring is arranged at the lower end of the plunger, and the plunger is connected with the cavity in a sealing manner through the plunger composite sealing ring.

3. The hydraulic support dual-cavity upright jack structure as claimed in claim 1, wherein a drain hole is provided at a lower portion of the reservoir chamber, and a safety valve is provided at the drain hole.

4. The hydraulic support dual-cavity upright post jack structure as claimed in claim 1, wherein the upper and lower cavities are provided with hydraulic oil holes, and threaded joints are provided at the hydraulic oil holes.

5. The hydraulic support dual-cavity column jack structure according to claim 1, wherein the elastic component is a spring.

6. The hydraulic support dual-cavity column jack structure as claimed in claim 5, wherein the elastic member is a belleville spring.

7. The hydraulic support double-cavity upright post jack structure as claimed in claim 6, wherein a stable nail is arranged at the lower end of the piston, the upper end of the belleville spring is sleeved in the stable nail, and the lower end of the belleville spring is abutted against the bottom surface of the lower cavity.

8. The hydraulic support double-cavity upright post jack structure as claimed in claim 1, wherein the lower end of the buffer cavity is provided with an explosion-proof hole.

9. The hydraulic support double-cavity upright post jack structure as claimed in claim 1, wherein a limiting part is arranged at the upper end of the buffer cavity, and a channel for communicating the liquid storage cavity and the buffer cavity is arranged on the limiting part;

10. An energy-absorbing impact-resistant constant-resistance method, which adopts the hydraulic support double-cavity upright post jack structure as claimed in any one of claims 1 to 9, and comprises the following steps: