An open-type full-section rock tunnel boring machine with segmented hinged main beam

Abstract

The present application discloses an open-type full-section rock tunnel boring machine with a main beam hinged in sections, comprising: a main drive connected to a cutterhead, the main drive being used to drive the cutterhead to rotate; a shield device mounted on the periphery of the main drive, comprising a plurality of shields and a drive member for driving the shields to extend and retract, the shields being used to press against the tunnel wall after being extended; a main beam comprising a first beam section and a second beam section connected in sections, the first beam section being hinged to the main drive, the main beam further comprising a fixing member for locking the deflection angle of the first beam section after the first beam section is deflected relative to the main drive; a support and propulsion system mounted on the second beam section, the propulsion end being connected to the main drive, the support and propulsion system being used to drive the main drive to move in a straight line when the first beam section is not deflected relative to the main drive, and to drive the main drive to move in a turning direction when the first beam section is deflected relative to the main drive. The above-mentioned open-type full-section rock tunnel boring machine with a main beam hinged in sections achieves the purpose of ultra-small turning of an open TBM.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel construction, and in particular to an open-type full-section rock tunnel boring machine with a main beam hinged in sections. Background Art

[0002] With the vigorous promotion of underground engineering construction, the proportion of tunnel boring machines used in mountain tunnels, large-scale water diversion, coal mine tunnels and other projects is increasing.

[0003] In the field of hard rock tunnels, open-type full-face rock tunnel boring machines (TBMs) are widely used due to their faster excavation speed, flexible initial support and advance processing methods, and lower overall costs. When encountering sections that require turning, due to the overly long main beam structure and the rigid connection method between the main beam and the main drive using bolts, the open TBM cannot adapt to the needs of ultra-small turns. At present, open TBMs all use the action of support shoes to perform small adjustments and turns. In order to increase the amplitude of adjustment and turning, the main method adopted in the existing technology is to shorten the main beam length as much as possible to reduce the length of the main machine, thereby achieving the purpose of smaller turns. However, an overly small main machine structure cannot meet the support requirements, and can only achieve the purpose of small turns, which is far from meeting the requirements of ultra-small turns.

[0004] Therefore, how to provide an open full-section rock tunnel boring machine with a main beam segmentally hinged to solve the above-mentioned technical problems is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] The purpose of this application is to provide an open full-section rock tunnel boring machine with a segmented hinged main beam. Through the deflection of the main beam, the main drive and the cutter head can be adjusted slightly, so as to achieve the purpose of ultra-small turning of the open TBM, so that the rock tunnel boring machine can adapt to the excavation of ultra-small rock tunnels, thereby improving the applicability of the rock tunnel boring machine.

[0006] To achieve the above objectives, the present application provides an open-type full-section rock tunnel boring machine with a main beam hinged in sections, comprising:

[0007] A main drive connected to a cutter disc, the main drive being used to drive the cutter disc to rotate;

[0008] A shield device is installed on the outer periphery of the main drive, including multiple shields and a driving member for driving the shields to be extended and retracted, and the shields are used to press against the cave wall after being extended;

[0009] a main beam comprising a first beam section and a second beam section connected in sections, the first beam section being hinged to the main drive, the main beam further comprising a fixing member for locking a deflection angle of the first beam section after the first beam section deflects relative to the main drive; and

[0010] A support propulsion system is installed on the second section beam, and the propulsion end is connected to the main drive. The support propulsion system is used to drive the main drive to move in a straight line when the first section beam is not deflected relative to the main drive, and to drive the main drive to move in a turning direction when the first section beam is deflected relative to the main drive.

[0011] In some embodiments, the main beam further includes a rear support capable of supporting the cave wall, the rear support being hinged to the first section of the beam, and the rear support being located below the second section of the beam and being slidably connected to the second section of the beam.

[0012] In some embodiments, an arc-shaped slide groove is provided on the lower side of the second section beam, and the arc direction of the slide groove coincides with the deflection direction of the first section beam, and an arc-shaped slide rail cooperating with the slide groove is provided on the upper side of the rear support.

[0013] In some embodiments, it also includes a slag receiving bucket installed in the cutter disc and a belt conveyor extending along the axial length of the main beam. The slag receiving bucket is used to receive the rock slag cut by the cutter disc, and the belt conveyor is used to transport the rock slag.

[0014] In some embodiments, the belt conveyor sequentially passes through the first section beam and the rear support along the axial length of the main beam.

[0015] In some embodiments, the shield device includes a top shield, a bottom shield, two groups of overlapping shields and two groups of side shields, the two groups of side shields are located on both sides of the top shield and the bottom shield, and the two groups of overlapping shields are respectively located between the top shield and the two groups of side shields; the top shield and the two groups of side shields are both provided with the driving parts, so that the top shield stabilizes the main machine when supporting the cave wall, and the two groups of side shields realize the deflection of the first section beam and the main drive when the extension and contraction degrees are different.

[0016] In some embodiments, the support propulsion system includes a propulsion cylinder, a support shoe, a tightening cylinder and a saddle frame. The saddle frame is installed on the main beam, the tightening cylinder is installed on the saddle frame and connected to the support shoe, and the propulsion cylinder is connected to the support shoe and the main drive respectively; the tightening cylinder is used to drive the support shoe to tighten the hole wall, and the propulsion cylinder is used to drive the main drive to move when the support shoe tightens the hole wall.

[0017] In some embodiments, the saddle frame is connected to the second section beam via a slide rail to achieve installation on the main beam.

[0018] In some embodiments, the support shoes are in two groups and are distributed on both sides of the main beam. The two groups of support shoes can hold the hole wall tightly and provide reaction force for the propulsion cylinder.

[0019] In some embodiments, the propulsion cylinders are divided into two groups and are distributed on both sides of the main beam, and both ends of the propulsion cylinders are respectively hinged to the support shoes and the main drive.

[0020] Compared with the above-mentioned background technology, the open-type full-section rock tunnel boring machine with a main beam hinged in sections provided in the present application includes: a main drive, connected to a cutterhead, and the main drive is used to drive the cutterhead to rotate; a shield device, installed on the periphery of the main drive, including multiple shields and a driving part that drives the shield to be extended and retracted, and the shield is used to press against the tunnel wall after being extended; a main beam, including a first section of beam and a second section of beam connected in sections, the first section of beam is hinged to the main drive, and the main beam also includes a fixing part for locking the deflection angle of the first section of beam after the first section of beam is deflected relative to the main drive; a support propulsion system, installed on the second section of beam, and the propulsion end is connected to the main drive, and the support propulsion system is used to drive the main drive to move in a straight line when the first section of beam is not deflected relative to the main drive, and to drive the main drive to move in a turning direction when the first section of beam is deflected relative to the main drive.

[0021] The open-type full-section rock tunnel boring machine with segmented articulated main beams can achieve small adjustments in the direction of the main drive and cutterhead through the deflection of the main beam, thereby achieving the goal of ultra-small turning of the open TBM, making the rock tunnel boring machine suitable for excavation of ultra-small rock tunnels, thereby expanding the applicability of the rock tunnel boring machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0023] Figure 1 A schematic structural diagram of an open-type full-section rock tunnel boring machine with a segmented hinged main beam provided in an embodiment of the present application;

[0024] Figure 2 A top view of the main beam provided in an embodiment of the present application when deflected;

[0025] Figure 3 A schematic structural diagram of a shield device provided in an embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of the support and propulsion system provided in an embodiment of the present application when the main beam is deflected.

[0027] in:

[0028] 1-cutter head, 2-slag hopper, 3-shield device, 4-main drive, 5-main beam, 6-support propulsion system, 7-belt conveyor,

[0029] 301-top shield, 302-lap shield, 303-side shield, 304-bottom shield,

[0030] 501-fixing part, 502-first beam, 503-second beam, 504-rear support,

[0031] 601-thrust cylinder, 602-holding shoe, 603-tightening cylinder, 604-saddle frame. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Please refer to Figures 1 to 4 ,in, Figure 1 This is a schematic structural diagram of an open-type full-section rock tunnel boring machine with a main beam segmentally hinged provided in an embodiment of the present application. Figure 2 A top view of the main beam during deflection provided in an embodiment of the present application, Figure 3 A schematic diagram of the structure of the shield device provided in an embodiment of the present application is shown. Figure 4 A schematic structural diagram of the support and propulsion system provided in an embodiment of the present application when the main beam is deflected.

[0035] In a first specific embodiment, the present application provides an open full-section rock tunnel boring machine with a main beam segmentally articulated, which mainly includes a cutter head 1, a shield device 3, a main drive 4, a main beam 5 and a support propulsion system 6.

[0036] The cutterhead 1 is connected to the front of the main drive 4. The cutterhead 1 rotates under the drive of the main drive 4 to crush rocks.

[0037] The shield device 3 is installed on the outer periphery of the main drive 4. The shield device 3 includes multiple shields and driving parts. The driving parts drive the shields to extend and retract, and the shields are pressed against the cave wall when extended.

[0038] The main drive 4 is installed at the front end of the main beam 5, and the main drive 4 drives the cutter head 1 to rotate to crush the rock.

[0039] The main beam 5 is arranged in sections, including a fixing part 501, a first beam section 502 and a second beam section 503. The first beam section 502 and the second beam section 503 are connected, and the first beam section 502 is hinged to the main drive 4 so that the first beam section 502 can deflect relative to the main drive 4, and the deflection angle of the first beam section 502 is locked by the fixing part 501.

[0040] The support propulsion system 6 is installed on the second section beam 503 behind the first section beam 502. The propulsion end of the support propulsion system 6 is connected to the main drive 4. The main drive 4 is driven to move by the support propulsion system 6, so that the main drive 4 and the cutter head 1 are pushed forward.

[0041] In this embodiment, when excavating, the support propulsion system 6 first holds the tunnel wall tightly to create a fulcrum that can push the main drive 4, and then directly pushes the main drive 4, thereby pushing the cutterhead 1 forward to excavate; the main drive 4 drives the cutterhead 1 to rotate, and the shield device 3 is close to the tunnel wall during excavation; after being pushed into place, the support shoe propulsion system 8 is retracted to complete the excavation of this section; the above steps are repeated to achieve continuous excavation.

[0042] It should be noted that there are multiple shields, and the number is not limited; when the extension and retraction degrees of different shields are different, the cutter head 1 can be adjusted slightly. Specifically, taking the example of setting shields in the horizontal left and right directions, when the extension and contraction degrees of the left shield and the right shield are the same, the left shield and the right shield are pressed against the tunnel wall at the same time. At this time, the first section beam 502 is not deflected relative to the main drive 4, and the angles of the main drive 4 and the cutter head 1 relative to the first section beam 502 do not change. The support propulsion system 6 drives the main drive 4 to move in a straight line, and the main drive 4 and the cutter head 1 advance forward in a straight line under the push; when the extension and contraction degrees of the left shield and the right shield are different, some shields are pressed against the tunnel wall, and some shields are not pressed against the tunnel wall. The main beam 5 will deflect with the shield pressed against the tunnel wall as a fulcrum. At this time, the first section beam 502 is deflected relative to the main drive 4, and the angles of the main drive 4 and the cutter head 1 relative to the first section beam 502 change. The deflection angle is then locked with the fixing part 501, and at this deflection angle, the support propulsion system 6 drives the main drive 4 to turn and move.

[0043] More specifically, the drive element is a cylinder, whose telescopic action drives the shield to extend and retract. The fixed element 501 is a wedge, which is used to wedge the first beam section 502 when the main beam 5 deflects, fixing it in a certain position and preventing it from rotating. When performing ultra-small radius turning excavation, first, by adjusting the different cylinder extension amounts of different shields, the main drive 4 and cutterhead 1 are deflected to a certain degree. Then, the wedge of the main beam 5 is released, and the main beam 5 is deflected to a predetermined angle by the support propulsion system 6. Then, a suitable wedge is selected to fix the first beam section 502, so that the first beam section 502 and the main drive 4 become rigidly connected. After the main machine's ultra-small turning posture is adjusted, the ultra-small turning radius turning excavation is carried out according to the above steps, adjusting the deflection angle of the main beam 5 while excavating. After each adjustment, the wedge is used to tighten the wedge, and the excavation process is repeated until the turning excavation is completed.

[0044] This open-type full-section rock tunnel boring machine with a segmented hinged main beam can achieve small adjustments in the direction of the main drive 4 and the cutterhead 1 through the deflection of the main beam 5, thereby achieving the purpose of ultra-small turning of the open TBM, making the rock tunnel boring machine suitable for excavation of ultra-small rock tunnels, thereby expanding the applicability of the rock tunnel boring machine.

[0045] In some embodiments, the main beam 5 further includes a rear support 504 , which is installed on the main beam 5 and can support the cave wall.

[0046] Specifically, the rear support 504 is hinged to the first section beam 502 , and the rear support 504 is located below the second section beam 503 and is slidably connected to the second section beam 503 .

[0047] In this embodiment, during excavation, after being pushed into place, the support shoe of the rear support 504 extends out to hold the cave wall tightly, and the support shoe pushing system 8 is retracted to complete the excavation of this section.

[0048] Exemplarily, an arc-shaped slide groove is provided on the lower side of the second section beam 503, and the arc direction of the slide groove coincides with the deflection direction of the first section beam 502, and an arc-shaped slide rail cooperating with the slide groove is provided on the upper side of the rear support 504.

[0049] In this embodiment, there is an arc-shaped sliding connection between the rear support 504 and the main beam 5, as shown by mark A in the figure, so that when the main beam 5 deflects, the second section beam 503 and the rear support 504 are always connected together.

[0050] In addition, the connection surface between the first beam section 502 and the main drive 4 is a cylindrical surface, which is then fixed by a hinge, so that the first beam section 502 can deflect along the tunnel centerline. The second beam section 503 is connected to the rear end of the first beam section 502 by bolts.

[0051] In some embodiments, it also includes a slag bucket 2 installed in the cutter head 1 and a belt conveyor 7 extending along the axial length of the main beam 5.

[0052] In this embodiment, the slag receiving bucket 2 is used to receive slag materials such as rock and soil generated by the excavation of the cutter head 1, and the belt conveyor 7 is used to transport the rock and soil dropped by the slag receiving bucket 2 to the rear of the tunnel.

[0053] In some embodiments, the belt conveyor 7 sequentially passes through the first section beam 502 and the rear support 504 along the axial length of the main beam 5 .

[0054] In this embodiment, the belt conveyor 7 is located inside the main beam 5, and passes through from the first section beam 502 to the rear support 504 in sequence. Because the belt conveyor 7 is placed inside the rear support 504 which is hingedly connected to the first section beam 502, it can ensure that when the entire machine makes an ultra-small turn, when the first section beam 502 deflects, the belt conveyor 7 then supports 504 to deflect in a small range, thereby avoiding situations where debris falls to the edge of the tunnel and is not conducive to material connection.

[0055] In some embodiments, the shield device 3 includes a top shield 301 , a bottom shield 304 , two sets of overlapping shields 302 , and two sets of side shields 303 .

[0056] In this embodiment, two sets of side shields 303 are located on both sides of the top shield 301 and the bottom shield 304, and two sets of overlapping shields 302 are respectively located between the top shield 301 and the two sets of side shields 303; the top shield 301 and the two sets of side shields 303 are both provided with driving parts to enable the top shield 301 to stabilize the main machine when holding the cave wall tightly, and the two sets of side shields 303 to achieve deflection of the first section beam 502 and the main drive 4 when the extension and contraction degrees are different.

[0057] Specifically, the two groups of side shields 303 are distributed left and right in the horizontal direction. Two lifting cylinders are provided inside the top shield 301 and the two groups of side shields 303. The top shield 301 and the two groups of side shields 303 can be extended and retracted in a small range under the action of the lifting cylinders; the top shield 301 is extended to support the cave wall to stabilize the main machine, and the different extension and retraction amounts of the two groups of side shields 303 can be used to achieve small adjustments in the direction of the main drive 4 and the cutter head 1.

[0058] In some embodiments, the support propulsion system 6 includes a propulsion cylinder 601 , a gripper shoe 602 , a tightening cylinder 603 and a saddle 604 .

[0059] In this embodiment, the saddle frame 604 is installed on the main beam 5, the tightening cylinder 603 is installed on the saddle frame 604 and connected to the tightening shoe 602, and the thrust cylinder 601 is respectively connected to the tightening shoe 602 and the main drive 4; the thrust cylinder 601 is used to provide forward power for the main drive 4 and the cutter head 1, and the tightening cylinder 603 is used to provide power for the tightening shoe 602 to tighten the cave wall, thereby providing a reaction force for the thrust cylinder 601.

[0060] In some embodiments, the saddle frame 604 is connected to the second section beam 503 via a slide rail to achieve installation on the main beam 5.

[0061] In this embodiment, the saddle frame 604 is placed on the main beam 5 and is connected to the second section beam 503 via a slide rail, which can drive the support propulsion system 6 to move on the second section beam 503.

[0062] In some embodiments, there are two groups of support shoes 602 distributed on both sides of the main beam 5 . The two groups of support shoes 602 can support the hole wall and provide reaction force for the propulsion cylinder 601 .

[0063] In this embodiment, the two groups of grippers 602 are distributed left and right in the horizontal direction. The two groups of grippers 602 are connected together through a tightening cylinder 603 to provide a reaction force for the thrust cylinder 601 .

[0064] In some embodiments, there are two groups of propulsion cylinders 601 distributed on both sides of the main beam 5 , and both ends of the propulsion cylinders 601 are hinged to the support shoes 602 and the main drive 4 respectively.

[0065] In this embodiment, two groups of propulsion cylinders 601 are distributed horizontally on the left and right sides, and the two groups of propulsion cylinders 601 are respectively connected to the left and right sides of the main drive 4 to provide forward power for the excavation of the main drive 4 and the cutter head 1.

[0066] In summary, this open-type full-section rock tunnel boring machine with a segmented articulated main beam is an open-type TBM with a shield that can be adjusted left and right and a segmented articulated main beam, which can adapt to the requirements of ultra-small turns.

[0067] Specifically, during excavation, the tightening cylinder 603 extends, driving the support shoe 602 to tighten the tunnel wall, creating a fulcrum for the propulsion cylinder 601; the propulsion cylinder 601 directly drives the main drive 4 and then drives the cutter head 1 to produce excavation action; the main drive 4 drives the cutter head 1 to rotate; the rock debris cut by the cutter head 1 is transported to the rear of the tunnel through the debris receiving bucket 2 and the belt conveyor 7; during excavation, the shield 3 is close to the tunnel wall; after the propulsion cylinder 601 is pushed into place, the rear support 504 support shoe extends out to tighten the tunnel wall, and the tightening cylinder 603 retracts, driving the support shoe 602 away from the tunnel wall; the propulsion cylinder 601 retracts, thereby driving the support shoe 602 into place; repeat the above steps to achieve continuous excavation.

[0068] When tunneling through an ultra-small radius turn:

[0069] First, by adjusting the different extension amounts of the oil cylinders of the side shields 303, the main drive 4 and the cutterhead 1 are deflected to a certain extent; then the wedges on the main beam 5 are loosened, and the main beam 5 is deflected to a predetermined angle by supporting the forward drive of the propulsion system 6, and then suitable wedges are selected to fix the first section beam 502, so that the main beam 5 and the main drive 4 become rigidly connected, and at the same time, the position of the rear support 504 is adjusted by utilizing the hinged relationship between the rear support 504 and the first section beam 502 and the sliding relationship between the rear support 504 and the second section beam 503, so as to keep the sliding connection between the second section beam 503 and the rear support 504 in a connected state at all times, and ensure that the belt conveyor 7 drops the material close to the center of the tunnel; after the ultra-small turning posture of the main machine is adjusted, the ultra-small turning radius turning excavation is carried out according to the above steps, and the deflection angle of the main beam 5 is adjusted while excavating. After each adjustment is completed, the wedge is used to wedge and tighten, and the excavation step-changing process is repeated until the turning excavation is completed.

[0070] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0071] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0072] The above is a detailed introduction to the open-type full-section rock tunnel boring machine with segmented hinged main beams provided by this application. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. An open full-section rock tunnel boring machine with a main beam hinged in sections, characterized in that: include: A main drive (4) connected to the cutter disc (1), wherein the main drive (4) is used to drive the cutter disc (1) to rotate; A shield device (3) is installed on the outer periphery of the main drive (4), comprising a plurality of shields and a driving member for driving the shields to extend and retract, wherein the shields are used to press against the cave wall after being extended; A main beam (5) comprising a first beam section (502) and a second beam section (503) connected in sections, wherein the first beam section (502) is hinged to the main drive (4), and the main beam (5) further comprises a fixing member (501) for locking the deflection angle of the first beam section (502) after the first beam section (502) deflects relative to the main drive (4); and a supporting propulsion system (6) installed on the second beam section (503), with a propulsion end connected to the main drive (4), the supporting propulsion system (6) being used to drive the main drive (4) to move linearly when the first beam section (502) is not deflected relative to the main drive (4), and to drive the main drive (4) to move in a turning direction when the first beam section (502) is deflected relative to the main drive (4); When performing ultra-small radius turning excavation, the main drive (4) and the cutterhead (1) are deflected by adjusting the extension amounts of different shields; the fixing member (501) fixing the first section beam (502) is loosened, the main beam (5) is deflected to a predetermined angle through the support propulsion system (6), and the fixing member (501) is then selected to fix the first section beam (502); after completing the ultra-small turning posture adjustment, ultra-small turning radius turning excavation is performed, the deflection angle of the main beam (5) is adjusted as the excavation progresses, and the adjustment and excavation process is repeated until the turning excavation is completed.

2. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 1, characterized in that: The main beam (5) further comprises a rear support (504) capable of supporting the cave wall, wherein the rear support (504) is hinged to the first beam section (502), and the rear support (504) is located below the second beam section (503) and is slidably connected to the second beam section (503).

3. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 2, characterized in that: The lower side of the second section beam (503) is provided with an arc-shaped slide groove, and the arc direction of the slide groove coincides with the deflection direction of the first section beam (502), and the upper side of the rear support (504) is provided with an arc-shaped slide rail that cooperates with the slide groove.

4. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 2, characterized in that: It also includes a slag receiving bucket (2) installed in the cutter head (1) and a belt conveyor (7) extending along the axial length of the main beam (5), wherein the slag receiving bucket (2) is used to receive the rock slag cut by the cutter head (1), and the belt conveyor (7) is used to transport the rock slag.

5. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 4, characterized in that: The belt conveyor (7) sequentially passes through the first section beam (502) and the rear support (504) along the axial length of the main beam (5).

6. The open full-face rock tunnel boring machine with segmented hinged main beams according to any one of claims 1 to 5, characterized in that: The shield device (3) comprises a top shield (301), a bottom shield (304), two groups of overlapping shields (302) and two groups of side shields (303), wherein the two groups of side shields (303) are located on both sides of the top shield (301) and the bottom shield (304), and the two groups of overlapping shields (302) are respectively located between the top shield (301) and the two groups of side shields (303); the top shield (301) and the two groups of side shields (303) are both provided with the driving member, so that the top shield (301) stabilizes the main machine when supporting the cave wall, and the two groups of side shields (303) realize the deflection of the first section beam (502) and the main drive (4) when the extension and contraction degrees are different.

7. The open full-face rock tunnel boring machine with segmented hinged main beams according to any one of claims 1 to 5, characterized in that: The supporting propulsion system (6) comprises a propulsion cylinder (601), a support shoe (602), a tightening cylinder (603) and a saddle frame (604); the saddle frame (604) is mounted on the main beam (5); the tightening cylinder (603) is mounted on the saddle frame (604) and connected to the support shoe (602); the propulsion cylinder (601) is respectively connected to the support shoe (602) and the main drive (4); the tightening cylinder (603) is used to drive the support shoe (602) to tighten the cave wall; the propulsion cylinder (601) is used to drive the main drive (4) to move when the support shoe (602) tightens the cave wall.

8. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 7, characterized in that: The saddle frame (604) is connected to the second section beam (503) via a slide rail to achieve installation on the main beam (5).

9. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 7, characterized in that: The support shoes (602) are in two groups and are distributed on both sides of the main beam (5). The two groups of support shoes (602) can support the hole wall and provide reaction force for the propulsion cylinder (601).

10. The open full-face rock tunnel boring machine with segmented hinged main beams according to claim 7, characterized in that: The propulsion oil cylinders (601) are in two groups and are distributed on both sides of the main beam (5). The two ends of the propulsion oil cylinders (601) are respectively hinged to the support shoes (602) and the main drive (4).

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