Advanced hydraulic support and supporting method

Abstract

The invention provides an advanced hydraulic support and a supporting method. The advanced hydraulic support comprises a stand column, the stand column comprises an outer cylinder and a movable column, and the lower portion of the movable column is located in the outer cylinder; the top beam comprises a top beam body, a plurality of hinged beams and a first driving part, the top of the movable column is arranged in the top beam column nest in a matched mode so that the top beam body can move relative to the movable column, the hinged beams are arranged on the circumferential side of the top beam body at intervals in the circumferential direction, the hinged beams are hinged to the top beam body, and the first driving part can drive the hinged beams to rotate upwards; the base comprises a base body, a plurality of hinged supporting legs and a second driving part, the bottom of the outer cylinder is arranged in the base column nest in a matched mode so that the outer cylinder can move relative to the base body, the hinged supporting legs are arranged on the peripheral side of the base body at intervals in the circumferential direction and hinged to the base body, and the second driving part can drive each hinged supporting leg to rotate downwards. Therefore, the advanced hydraulic support has the advantages of being convenient to support and improving efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to an advanced hydraulic support and a supporting method. Background Art

[0002] During the mining process of the working face, the transport tunnel and rail tunnel of the working face in front of the working face are in the superposition influence area of ​​the working face advance support pressure and lateral support pressure. The tunnel deformation is large and the damage is serious. It is necessary to take measures to strengthen support and unload pressure to prevent excessive deformation of the tunnel. Among the related technologies, the most commonly used advance supports are step-type advance hydraulic supports and unit advance supports. The above two types of advance supports cannot quickly and conveniently adjust the walking direction and position, and have poor support adaptability in large-angle complex section tunnels and large deformation tunnels. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an advanced hydraulic support and a support method.

[0004] The advanced hydraulic support of the embodiment of the present invention comprises:

[0005] A column, the column comprising an outer cylinder and a piston, the lower part of the piston is located in the outer cylinder, and the piston is telescopically arranged in the outer cylinder so that the length of the column can be adjusted;

[0006] A top beam, the top beam comprising a top beam body, a plurality of hinged beams and a first driving part, a top beam column socket is provided on the lower surface of the top beam body, the inner wall surface of the top beam column socket is a concave spherical surface, the top of the movable column is a spherical surface, the top of the movable column is fitted in the top beam column socket so that the top beam body can move relative to the movable column, a plurality of hinged beams are arranged at intervals along the circumferential direction on the peripheral side of the top beam body, the hinged beam is hinged to the top beam body, and the first driving part can drive each of the hinged beams to rotate upward;

[0007] The base comprises a base body, a plurality of hinged legs and a second driving unit, the upper surface of the base body is provided with a base column socket, the inner wall surface of the base column socket is a concave spherical surface, the bottom of the outer cylinder is a spherical surface, the bottom of the outer cylinder is fitted in the base column socket so that the outer cylinder can move relative to the base body, a plurality of hinged legs are arranged at intervals along the circumferential direction on the peripheral side of the base body, the hinged legs are hinged to the base body, and the second driving unit can drive each of the hinged legs to rotate downward.

[0008] Therefore, the advanced hydraulic support according to the embodiment of the present invention has the advantages of facilitating support and improving efficiency.

[0009] In some embodiments, the first driving part includes a plurality of first adjusting oil cylinders, the plurality of first adjusting oil cylinders are connected to the plurality of articulated beams one by one, the first adjusting oil cylinders can drive the corresponding articulated beams to rotate upward so that the articulated beams have a top beam supporting position, in which the top surface of the articulated beam and the top surface of the top beam body are used to support the top plate;

[0010] The second driving unit includes a plurality of second adjusting cylinders, which are connected to the plurality of articulated legs one by one. The second adjusting cylinders can drive the corresponding articulated legs to rotate downward so that the articulated legs have a base supporting position. In the base supporting position, the bottom surface of the articulated legs and the bottom surface of the base body are used to support the bottom plate.

[0011] In some embodiments, a top beam fixing seat is provided on the plunger, a fixing portion of each of the first adjusting oil cylinders is hinged to the top beam fixing seat, and a telescopic portion of each of the first adjusting oil cylinders is hinged to the corresponding articulated beam;

[0012] A base fixing seat is provided on the outer cylinder, the fixing portion of each second adjusting oil cylinder is hinged to the base fixing seat, and the telescopic portion of each second adjusting oil cylinder is hinged to the corresponding articulated leg.

[0013] In some embodiments, the top beam fixing seat is annular and is sleeved on the outside of the plunger, and the position of the top beam fixing seat in the length direction of the plunger is adjustable;

[0014] The base fixing seat is annular and sleeved on the outside of the outer cylinder.

[0015] In some embodiments, each of the top beams includes at least three hinged beams, and the plurality of hinged beams are evenly spaced and arranged on the circumferential side of the top beam body along the circumferential direction;

[0016] Each of the bases comprises at least three hinged legs, and the plurality of hinged legs are evenly spaced along the circumferential direction on the circumferential side of the base body.

[0017] In some embodiments, the top beam body is a circular plate body, and the base body is a circular plate body;

[0018] Each of the top beams includes three hinged beams, and each of the bases includes three hinged legs.

[0019] In some embodiments, each of the hinged legs is provided with a running wheel at one end away from the base body, and the running wheel can move downward relative to the hinged leg.

[0020] In some embodiments, each of the articulated legs is provided with a plurality of spaced connection portions in the length direction thereof, and the fixing portion of each of the second adjusting cylinders can be selectively articulated with one of the plurality of connection portions of the articulated leg.

[0021] In some embodiments, the bottom of the plunger separates the outer cylinder into a rod chamber and a rodless chamber, the rodless chamber is located below the rod chamber, the plunger has a plunger chamber, a safety valve is provided at the bottom of the plunger chamber, when the liquid pressure in the outer cylinder chamber exceeds the set pressure of the safety valve, the liquid in the rodless chamber can flow into the plunger chamber through the safety valve;

[0022] A plurality of damping holes are arranged on the peripheral side of the piston, and the liquid in the piston cavity can enter the rod cavity through the damping holes.

[0023] The present invention also proposes a support method using the above-mentioned advance hydraulic support, comprising the following steps: using multiple advance hydraulic supports to support the tunnel in groups, adjusting the positions of the top beam body, base body and columns of each of the advance hydraulic supports, so that the top beam body and multiple hinged beams of each of the advance hydraulic supports abut against the tunnel roof, and the base body and multiple hinged legs of each of the advance hydraulic supports abut against the tunnel bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of an advanced hydraulic support according to an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of folding the advanced hydraulic support according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the unfolding of the hinged legs according to an embodiment of the present invention.

[0027] Figure 4 is a schematic diagram of a column according to an embodiment of the present invention.

[0028] Figure 5 is a top view of a top beam according to an embodiment of the present invention.

[0029] Figure 6 is a top view of a base according to an embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of an advanced hydraulic support support according to an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram of an advanced hydraulic support support according to another embodiment of the present invention.

[0032] Fig. 9It is a schematic diagram of an advanced hydraulic support support according to another embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. column, 11. outer cylinder, 12. piston, 13. rod chamber, 14. rodless chamber, 15. piston chamber, 16. safety valve, 17. damping hole;

[0035] 2. top beam, 21. top beam body, 22. hinged beam, 23. first adjusting oil cylinder, 24. top beam fixing seat;

[0036] 3. base, 31. base body, 32. hinged legs, 321. connecting part, 33. second adjusting cylinder, 34. base fixing seat, 35. walking wheel. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] The following describes the advanced hydraulic support of the embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 9 As shown, the advanced hydraulic support according to an embodiment of the present invention includes a column 1, a top beam 2 and a base 3.

[0039] The column 1 includes an outer cylinder 11 and a piston 12. The lower part of the piston 12 is located in the outer cylinder 11. The piston 12 is telescopically arranged in the outer cylinder 11 so that the length (height) of the column 1 can be adjusted, so as to adjust the distance between the top beam 2 and the base 3, thereby adjusting the height of the top beam 2. Specifically, the bottom of the piston 12 separates the outer cylinder 11 into a rod chamber 13 and a rodless chamber 14, and the rodless chamber 14 is located below the rod chamber 13. The piston 12 has a piston chamber 15, and a safety valve 16 is provided at the bottom (center position) of the piston chamber 15. When the liquid pressure in the cavity of the outer cylinder 11 exceeds the set pressure of the safety valve 16, the liquid in the rodless chamber 14 can flow into the piston chamber 15 through the safety valve 16. A plurality of damping holes 17 are provided on the peripheral side of the piston 12, and the liquid in the piston chamber 15 can enter the rod chamber 13 through the damping holes 17. In this way, the column 1 can be prevented from being crushed, and the supporting performance can be ensured while quickly absorbing and giving way, thereby improving the buffering performance and supporting capacity of the column under impact load conditions.

[0040] The top beam 2 includes a top beam body 21, a plurality of hinged beams 22 and a first driving part. A top beam column socket is provided on the lower surface of the top beam body 21, the inner wall surface of the top beam column socket is a concave spherical surface, the top of the plunger 12 is a spherical surface, and the top of the plunger 12 fits in the top beam column socket so that the top beam body 21 can move relative to the plunger 12. Specifically, the spherical surface of the top of the plunger 12 is slidably connected to the spherical surface of the top beam column socket, that is, the top of the plunger 12 is spherically hinged to the top beam column socket, so that the top beam body 21 can move relative to the plunger 12 in multiple directions, thereby facilitating the adaptation to the ups and downs of the tunnel roof.

[0041] A plurality of articulated beams 22 are arranged at intervals along the circumferential direction on the circumferential side of the top beam body 21, and the articulated beams 22 are articulated with the top beam body 21. The first driving unit can drive each articulated beam 22 to rotate upward. Specifically, the first driving unit includes a plurality of first adjusting cylinders 23, and the plurality of first adjusting cylinders 23 are connected to the plurality of articulated beams 22 in a one-to-one correspondence. The first adjusting cylinders 23 can drive the corresponding articulated beams 22 to rotate upward so that the articulated beams 22 have a top beam supporting position. In the top beam supporting position, the top surface of the articulated beam 22 and the top surface of the top beam body 21 are used to support the top plate. In this way, the articulated beams 22 can be folded and unfolded. After being folded, the articulated beams 22 can be easily transported. After being unfolded, the articulated beams 22 can be moved to the top beam supporting position, so as to be used to support the top plate.

[0042] In some embodiments, a top beam fixing seat 24 is provided on the piston 12, a fixing portion of each first adjustment oil cylinder 23 is hinged to the top beam fixing seat 24, and a telescopic portion of each first adjustment oil cylinder 23 is hinged to a corresponding hinged beam 22. The top beam fixing seat 24 is annular and sleeved on the outside of the piston 12, and the position of the top beam fixing seat 24 in the length direction of the piston 12 is adjustable. Specifically, a connecting hole is provided on the top beam fixing seat 24, and a plurality of connecting holes are provided on the piston 12, and the connecting column can pass through the connecting holes on the top beam fixing seat 24 and the piston 12 so that the top beam fixing seat 24 is fixed on the piston 12.

[0043] The base 3 includes a base body 31, a plurality of hinged legs 32, and a second driving part. A base column socket is provided on the upper surface of the base body 31, the inner wall surface of the base column socket is a concave spherical surface, the bottom of the outer cylinder 11 is a spherical surface, and the bottom of the outer cylinder 11 fits in the base column socket so that the outer cylinder 11 can move relative to the base body 31. Specifically, the spherical surface of the bottom of the outer cylinder 11 is slidably connected with the spherical surface of the base column socket, that is, the bottom of the outer cylinder 11 is spherically hinged with the base column socket, so that the outer cylinder 11 can move relative to the base body 31 in multiple directions.

[0044] A plurality of articulated legs 32 are arranged at intervals along the circumferential direction on the circumferential side of the base body 31, and the articulated legs 32 are articulated with the base body 31, and the second driving unit can drive each articulated leg 32 to rotate downward. Specifically, the second driving unit includes a plurality of second adjustment cylinders 33, and the plurality of second adjustment cylinders 33 are connected to the plurality of articulated legs 32 one by one, and the second adjustment cylinders 33 can drive the corresponding articulated legs 32 to rotate downward so that the articulated legs 32 have a base support position, and in the base support position, the bottom surface of the articulated legs 32 and the bottom surface of the base body 31 are used to support the bottom plate. In this way, the articulated legs 32 can be folded and unfolded, and the articulated legs 32 can be conveniently transported after being folded, and can be moved to the base support position after being unfolded, so as to be used to support the bottom plate.

[0045] In some embodiments, a base fixing seat 34 is provided on the outer cylinder 11, a fixing portion of each second adjustment oil cylinder 33 is hinged to the base fixing seat 34, and a telescopic portion of each second adjustment oil cylinder 33 is hinged to a corresponding hinged leg 32. The base fixing seat 34 is annular and sleeved on the outer side of the outer cylinder 11.

[0046] In some embodiments, the top beam body 21 is a circular plate body, and the base body 31 is a circular plate body. Each top beam 2 includes at least three hinged beams 22, and the plurality of hinged beams 22 are evenly spaced along the circumference of the top beam body 21. Each base 3 includes at least three hinged legs 32, and the plurality of hinged legs 32 are evenly spaced along the circumference of the base body 31. Specifically, each top beam 2 includes three hinged beams 22, and each base 3 includes three hinged legs 32.

[0047] In some embodiments, a travel wheel 35 is provided at one end of each articulated leg 32 away from the base body 31, and the travel wheel 35 can move downward relative to the articulated leg 32. Specifically, the travel wheel 35 is rotatably provided at one end of each articulated leg 32 away from the base body 31, the fixed part of the travel wheel telescopic cylinder is hinged to the end of the articulated leg 32 away from the base body 31, and the telescopic part of the travel wheel telescopic cylinder is hinged to the corresponding travel wheel 35, so that when movement is required, the travel wheel telescopic cylinder drives the travel wheel 35 to rotate downward so that the travel wheel 35 contacts the ground. The travel wheel 35 can be freely retracted and extended, and short-distance movement and turning within the tunnel section can be achieved during walking, which solves the problem of the support turning around and carrying difficulties.

[0048] In some embodiments, each articulated leg 32 is provided with a plurality of spaced connection parts 321 in the length direction thereof, and the fixing part of each second adjustment oil cylinder 33 can be selectively articulated with one of the plurality of connection parts 321 of the articulated leg 32. Specifically, the fixing part of the second adjustment oil cylinder 33 can be connected to one of the plurality of connection parts 321 adjacent to the outer cylinder 11 or away from the outer cylinder 11 as required, so that the supporting force of the articulated leg 32 and the second adjustment oil cylinder 33 on the outer cylinder 11 can be adjusted.

[0049] The column 1 of the advanced hydraulic support according to the embodiment of the present invention can be extended and retracted, and the walking wheel 35 can be extended and retracted, so that the entire advanced support can be folded and unfolded when working. The folded state is convenient for passing through low lanes, saving transportation costs. Moreover, the top beam 2 and the base 3 can move in multiple directions relative to the column 1, so that the advanced hydraulic support can freely adjust the base 3 fulcrum and the top beam 2 fulcrum separately according to the required tilt angle, so as to improve efficiency.

[0050] Therefore, the advanced hydraulic support according to the embodiment of the present invention has the advantages of facilitating support and improving efficiency.

[0051] The present invention also proposes a support method for an advance hydraulic support according to an embodiment of the present invention. The support method according to the embodiment of the present invention includes the following steps: using multiple advance hydraulic supports to support the tunnel in groups, adjusting the positions of the top beam body 21, the base body 31 and the column 1 of each advance hydraulic support, so that the top beam body 21 and the multiple hinged beams 22 of each advance hydraulic support are abutted against the tunnel roof, and the base body 31 and the multiple hinged legs 32 of each advance hydraulic support are abutted against the tunnel bottom plate.

[0052] like Figure 7 As shown in FIG. 1 , in a specific embodiment, the top surfaces of the top beam body 21 and the plurality of hinged beams 22 are substantially horizontal surfaces. Figure 8 As shown, in a specific embodiment, the top surfaces of the top beam body 21 and the plurality of hinged beams 22 are inclined, and the column 1 extends in the up-down direction. Fig. 9 As shown, in a specific embodiment, the top surfaces of the top beam body 21 and the plurality of hinged beams 22 are inclined, and the column 1 is inclined.

[0053] Multiple advance hydraulic supports are used in groups at the same time. During use, each advance hydraulic support is independently supported and transferred. The advance hydraulic supports in the last row can be directly transported to the front row by the walking wheels 35 to achieve cyclic support. Only the last row of advance hydraulic supports is moved in each cycle, avoiding repeated support of the same position of the roof.

[0054] Therefore, the supporting method according to the embodiment of the present invention has the advantages of facilitating support and improving efficiency.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An advanced hydraulic support, characterized in that: include: A column, the column comprising an outer cylinder and a piston, the lower part of the piston is located in the outer cylinder, and the piston is telescopically arranged in the outer cylinder so that the length of the column can be adjusted; A top beam, the top beam comprising a top beam body, a plurality of hinged beams and a first driving part, a top beam column socket is provided on the lower surface of the top beam body, the inner wall surface of the top beam column socket is a concave spherical surface, the top of the movable column is a spherical surface, the top of the movable column is fitted in the top beam column socket so that the top beam body can move relative to the movable column, a plurality of hinged beams are arranged at intervals along the circumferential direction on the peripheral side of the top beam body, the hinged beam is hinged to the top beam body, and the first driving part can drive each of the hinged beams to rotate upward; The base comprises a base body, a plurality of hinged legs and a second driving unit, the upper surface of the base body is provided with a base column socket, the inner wall surface of the base column socket is a concave spherical surface, the bottom of the outer cylinder is a spherical surface, the bottom of the outer cylinder is fitted in the base column socket so that the outer cylinder can move relative to the base body, a plurality of hinged legs are arranged at intervals along the circumferential direction on the peripheral side of the base body, the hinged legs are hinged to the base body, and the second driving unit can drive each of the hinged legs to rotate downward.

2. The advanced hydraulic support according to claim 1, characterized in that: The first driving part includes a plurality of first adjusting oil cylinders, which are connected to the plurality of articulated beams one by one, and the first adjusting oil cylinders can drive the corresponding articulated beams to rotate upward so that the articulated beams have a top beam supporting position, in which the top surface of the articulated beam and the top surface of the top beam body are used to support the top plate; The second driving unit includes a plurality of second adjusting cylinders, which are connected to the plurality of articulated legs one by one. The second adjusting cylinders can drive the corresponding articulated legs to rotate downward so that the articulated legs have a base supporting position. In the base supporting position, the bottom surface of the articulated legs and the bottom surface of the base body are used to support the bottom plate.

3. The advanced hydraulic support according to claim 2, characterized in that: A top beam fixing seat is provided on the live column, a fixing portion of each of the first adjusting oil cylinders is hinged to the top beam fixing seat, and a telescopic portion of each of the first adjusting oil cylinders is hinged to the corresponding hinged beam; A base fixing seat is provided on the outer cylinder, the fixing portion of each second adjusting oil cylinder is hinged to the base fixing seat, and the telescopic portion of each second adjusting oil cylinder is hinged to the corresponding articulated leg.

4. The advanced hydraulic support according to claim 3, characterized in that: The top beam fixing seat is annular and sleeved on the outside of the plunger, and the position of the top beam fixing seat in the length direction of the plunger is adjustable; The base fixing seat is annular and sleeved on the outside of the outer cylinder.

5. The advanced hydraulic support according to claim 1, characterized in that: Each of the top beams comprises at least three hinged beams, and the plurality of hinged beams are evenly spaced and arranged on the circumferential side of the top beam body along the circumferential direction; Each of the bases comprises at least three hinged legs, and the plurality of hinged legs are evenly spaced along the circumferential direction on the circumferential side of the base body.

6. The advanced hydraulic support according to claim 5, characterized in that: The top beam body is a circular plate body, and the base body is a circular plate body; Each of the top beams includes three hinged beams, and each of the bases includes three hinged legs.

7. The advanced hydraulic support according to claim 1, characterized in that: A running wheel is provided at one end of each of the hinged legs away from the base body, and the running wheel can move downward relative to the hinged legs.

8. The advanced hydraulic support according to claim 3, characterized in that: Each of the articulated legs is provided with a plurality of connection portions spaced apart in the length direction thereof, and the fixing portion of each of the second adjusting oil cylinders can be selectively articulated with one of the plurality of connection portions of the articulated leg.

9. The advanced hydraulic support according to any one of claims 1 to 8, characterized in that: The bottom of the piston separates the outer cylinder into a rod chamber and a rodless chamber, the rodless chamber is located below the rod chamber, the piston has a piston chamber, and a safety valve is provided at the bottom of the piston chamber. When the liquid pressure in the outer cylinder chamber exceeds the set pressure of the safety valve, the liquid in the rodless chamber can flow into the piston chamber through the safety valve; A plurality of damping holes are arranged on the peripheral side of the piston, and the liquid in the piston cavity can enter the rod cavity through the damping holes.

10. A supporting method using the advanced hydraulic support according to any one of claims 1 to 9, characterized in that: The following steps are involved: A plurality of advance hydraulic supports are used to support the tunnel in groups, and the positions of the top beam body, base body and columns of each advance hydraulic support are adjusted so that the top beam body and multiple hinged beams of each advance hydraulic support abut against the tunnel roof, and the base body and multiple hinged legs of each advance hydraulic support abut against the tunnel bottom plate.

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