Novel cutting and sawing combined cantilever tunneling device and method

Abstract

The invention provides a novel cutting and sawing combined cantilever tunneling device and method.The novel cutting and sawing combined cantilever tunneling device comprises a synchronous multi-track cutting device, a multipurpose forcible entry drilling device and a control system, the synchronous multi-track cutting device comprises a rotatable base, an execution large arm, a rotating device and a cutting and sawing assembly, and the rotatable base is arranged on a cantilever tunneling machine body; one end of the execution big arm is arranged on a rotatable base, the rotatable base can drive the execution big arm to rotate in the horizontal direction, and an adjusting mechanism is arranged on the execution big arm; and the control system is used for controlling the actions of the synchronous multi-track cutting device and the multipurpose forcible entry drilling device and controlling the cutting, forcible entry and / or drilling process according to operation requirements. According to the invention, a new design scheme of combining the cutting saw and the cantilever tunneling machine is utilized, so that the cutting saw and mechanical combined tunneling of the hard rock can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of underground engineering, and in particular relates to a novel sawing combined cantilever excavation device and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Tunnel engineering plays a vital role in the construction of water conservancy projects, transportation projects and modern urban underground projects. In order to achieve efficient and safe tunnel construction, cantilever tunnel boring machines have become a widely used mechanized construction equipment. Cantilever tunnel boring machines can realize functions such as cutting, loading and transportation, and self-propelled, and are widely used in the construction of soft rock tunnels. Compared with the traditional drilling and blasting method, cantilever tunnel boring machines have the advantages of less vibration and continuous construction.

[0004] However, when facing rock masses with high strength and abrasiveness index, the cantilever tunneling machine will have problems such as low cutting efficiency, severe tool wear, and slow construction progress, which increases the cost of tunnel construction. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a novel sawing combined with cantilever tunneling device and method. The present invention utilizes a new design scheme that integrates sawing with a cantilever tunneling machine to achieve combined sawing and mechanical tunneling of hard rock.

[0006] According to some embodiments, the present invention adopts the following technical solutions:

[0007] A novel saw-cut combined cantilever excavation device comprises a cantilever excavator body, on which a synchronous multi-track cutting device, a multi-purpose demolition drilling device and a control system are arranged, wherein:

[0008] The synchronous multi-track cutting device includes a rotatable base, an execution arm, a rotating device and a saw assembly, wherein the rotatable base is arranged on the cantilever tunneling machine body, one end of the execution arm is arranged on the rotatable base, and the rotatable base can drive the execution arm to rotate in the horizontal direction to change the working direction of the execution arm;

[0009] The execution arm is provided with an adjustment mechanism, which can realize the movement and adjustment of the execution arm in the vertical direction;

[0010] The other end of the execution arm is connected to the saw assembly through a rotating device, and the angle between the saw assembly and the execution arm is adjusted through the rotating device to adjust the cutting angle;

[0011] The multi-purpose demolition drilling device comprises a cantilever, and a butt joint is provided at the end of the cantilever, and the butt joint is used for detachably connecting a cutting head or a breaker hammer;

[0012] The control system is used to control the actions of the synchronous multi-track cutting device and the multi-purpose demolition and drilling device, and to control the cutting, demolition and / or drilling processes according to the operation requirements.

[0013] As an optional embodiment, the rotatable base includes a first gear, a second gear, a driving mechanism and a bearing, the first gear is fixed to the cantilever tunneling machine body through the bearing, and the execution arm is arranged on the first gear;

[0014] The first gear and the second gear are meshed, and the second gear is fixed to the output shaft of the driving mechanism. The driving mechanism is arranged on the cantilever tunneling machine body. The driving mechanism is used to drive the second gear to rotate. The rotation of the second gear drives the first gear to rotate, and then drives the execution arm to rotate in the horizontal direction.

[0015] As an optional embodiment, the execution boom includes a base, a boom part and a terminal part, and the parts are rotatably connected through a rotating shaft. The base is arranged on the cantilever tunneling machine body, one end of the boom part is connected to the base, and the other end is connected to the terminal part;

[0016] The adjustment mechanism includes two graded control cylinders, wherein the first-level cylinder is arranged between the base and the boom part, and is used to control the up and down adjustment of the boom part; the second-level cylinder is arranged between the boom part and the end part, and is used to control the displacement adjustment of the end part.

[0017] The first-stage oil cylinder controls the up and down adjustment under a large position range, which can realize the movement of a larger displacement; the second-stage oil cylinder controls the small-range adjustment of the cutting saw device at the end of the actuator to achieve more precise regulation; through the mutual cooperation of the above two oil cylinders, the up and down movement of the cutting saw at the cutting end for cutting is realized.

[0018] As a further embodiment, a rotating device is provided at the top end of the end portion, and the saw assembly is provided at the end of the rotating device.

[0019] As an optional embodiment, the sawing assembly includes a connecting shaft, a sawing power motor and a sawing blade, the connecting shaft is arranged at the end of the rotating device, the sawing power motor is arranged on the connecting shaft, and a sawing blade is arranged at each end of the connecting shaft, and the sawing power motor is used to drive each sawing blade to cut synchronously.

[0020] As a further feature, the connecting shaft is a hollow structure, and the sawing power motor is arranged inside the hollow structure.

[0021] As an optional embodiment, the diameter of the saw blade is determined according to the kerf depth;

[0022] The spacing of the saw blades is determined according to the rock strength.

[0023] As an optional implementation, a water cooling pipeline is also provided on the execution arm to cool the saw assembly when cutting.

[0024] As an optional implementation, the synchronous multi-track cutting device is provided with a rock strength test identification system for calculating the rock strength and integrity based on the motor torque and propulsion force during cutting. The calculation process is P=η*N*F, where η is the coefficient to be determined, N is the torque of the motor, and F is the propulsion force.

[0025] As an optional embodiment, the multi-purpose demolition drilling device is arranged at the front part of the cantilever tunnel boring machine body, below the synchronous multi-track cutting device.

[0026] As an optional implementation, the control system is configured to set an operation process according to the rock strength of the tunnel face: when the rock strength is less than a set value, the synchronous multi-track cutting device is controlled to rotate to a preset angle and move to a preset position without interfering with the operation of the multi-purpose demolition drilling device;

[0027] When the rock strength is greater than the set value, the synchronous multi-track cutting device is controlled to cut in a partial area of ​​the face. After the cutting of this partial area is completed, the synchronous multi-track cutting device is controlled to move to another partial area to work, and the multi-purpose demolition drilling device is controlled to demolish and / or excavate along the prefabricated cutting seam in the partial area where the cutting is completed.

[0028] The working method of the novel saw-cut combined cantilever tunneling device includes the following steps: obtaining rock strength data of the tunnel face;

[0029] When the rock strength is less than the set value, the synchronous multi-track cutting device is controlled to rotate to a preset angle and move to a preset position without interfering with the operation of the multi-purpose demolition drilling device;

[0030] When the rock strength is greater than the set value, the synchronous multi-track cutting device is controlled to cut in a partial area of ​​the face. After the cutting of this partial area is completed, the synchronous multi-track cutting device is controlled to move to another partial area to work, and the multi-purpose demolition drilling device is controlled to demolish and / or excavate along the prefabricated cutting seam in the partial area where the cutting is completed.

[0031] As an optional implementation, if the synchronous multi-track cutting device and the multi-purpose demolition drilling device interfere with each other, the synchronous multi-track cutting device is first controlled to perform grid cutting to produce prefabricated cracks, and then the multi-purpose demolition drilling device is controlled to work. If interference still occurs at this time, the synchronous multi-track cutting device is controlled to move and / or rotate to make room for the excavation position for the multi-purpose demolition drilling device.

[0032] As an optional embodiment, the cutting depth model of the synchronous multi-track cutting device is L=η×N×l×F×S×D, where η is the unknown coefficient, N is the motor speed, l is the width, F is the travel propulsion force, S is the feed rate, and D is the diameter of the saw blade.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a novel sawing combined with cantilever excavation device, which adds a synchronous multi-track cutting device. Through the rotatable base of the synchronous multi-track cutting device, the function of adjusting the synchronous multi-track cutting device to any angle can be realized.

[0035] The synchronous multi-track cutting device of the present invention has two graded control cylinders on its execution arm. The first-level cylinder controls the up and down adjustment under a large position range, which can realize movement with a larger displacement; the second-level cylinder controls the small-range adjustment of the cutting saw device at the end of the actuator, which can realize more precise regulation; through the mutual cooperation of the above two cylinders, the up and down movement of the cutting saw at the cutting end for cutting is realized.

[0036] The synchronous multi-track cutting device of the present invention can adjust the sawing speed according to actual needs to achieve a high rotation of the speed, thereby breaking rocks. The saw blade diameter can be installed and adjusted according to the cutting depth, so that the cutting efficiency of the cutting is greatly improved.

[0037] The multi-purpose demolition drilling device of the present invention is provided with a docking joint, which can quickly and conveniently replace the cutting head and the breaker hammer, and can be adjusted according to actual needs, thereby performing efficient excavation.

[0038] The synchronous multi-track cutting device and the multi-purpose demolition drilling device of the present invention can work together and be used synchronously and cross-wise, and provide feedback on cutting or not cutting according to the specific value of the rock strength, thereby achieving optimal operation and improving operation efficiency.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0041] Figure 1 It is a side view of a novel saw-cutting combined cantilever excavation device according to an embodiment;

[0042] Figure 2 It is a front view of a novel saw-cutting combined cantilever excavation device according to an embodiment;

[0043] Figure 3 is a schematic structural diagram of a synchronous multi-track cutting device according to an embodiment;

[0044] Figure 4 It is a schematic structural diagram of a multi-purpose demolition drilling device according to an embodiment;

[0045] Figure 5 The present invention is a saw cutting trajectory diagram of an embodiment.

[0046] Wherein, 100 is a synchronous multi-track cutting device;

[0047] 200 is a multi-purpose demolition drilling device;

[0048] 300 is a control system;

[0049] 101 is a rotatable base, 102 is a bearing, 103 is an upper rotating support seat, 104 is a servo motor, 105 is a primary oil cylinder, 106 is a secondary oil cylinder, 107 is a rotating device, 108 is a saw blade, 109 is a saw power motor, and 110 is a water cooling pipeline.

[0050] 201 is a quick-change joint, 202 is a cantilever tunnel boring machine cutting head, and 203 is a hydraulic breaker hammer. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other.

[0055] Embodiment 1

[0056] A novel saw-cut combined cantilever excavation device comprises a cantilever excavation device body, such as Figure 1 As shown, a synchronous multi-track cutting device 100, a multi-purpose demolition drilling device 200 and a control system 300 are arranged on the main body.

[0057] First, the synchronous multi-track cutting device 100 is introduced. The bottom of the device is a rotatable base 101. The rotatable base 101 includes a large gear, a servo motor 104, a small gear and a bearing 102. The servo motor 104 is fixed on the upper rotating support seat 103 of the main bed of the cantilever tunnel boring machine, the small gear is fixed on the output shaft of the servo motor 104, and the large gear is fixed on the main bed of the tunnel boring machine through the bearing 102.

[0058] The synchronous multi-track cutting device 100 realizes rotation adjustment in the following way: the output shaft of the servo motor 104 drives the small gear internally, and the outer teeth of the small ruler wheel drives the inner teeth of the large gear, and the servo motor 104 transmits the rotation accurately, thereby realizing the function of the synchronous multi-track cutting device 100 being able to adjust any angle.

[0059] There are two graded control cylinders on the execution arm of the synchronous multi-track cutting device 100. The first-level cylinder 105 controls the up and down adjustment under the large position range, which can achieve a large displacement movement. The second-level cylinder 106 controls the small range adjustment of the end saw device of the actuator to achieve more precise regulation. Through the mutual cooperation of the above two cylinders, the up and down movement of the end saw of the cutting is realized.

[0060] like Figure 3 As shown, the end of the synchronous multi-track cutting device 100 is composed of a rotating device 107 and a saw. The rotating device 107 is connected to the end of the execution arm and can realize the function of rotating around, mainly for rotating the saw, so as to perform horizontal cutting. The saw power motor 109 is installed in the inner cavity of the middle connecting shaft of the saw, which can drive the saw blade 108 to rotate. The saw speed can be adjusted according to actual needs to achieve a high rotation speed, so as to break the rock.

[0061] The diameter of the saw blade 108 can be installed and adjusted according to the depth of the cut. For example, the saw blade 108 has a diameter of 1.2 meters and is expected to be able to cut a hole wall with a depth of 0.5 meters.

[0062] At the same time, two saw blades 108 can be installed at both ends of the connecting shaft, so the cutting efficiency of the kerf is greatly improved.

[0063] Since the cutting depth of the saw is the key parameter of the joint rock breaking, the saw cutting depth model is constructed. The specific actual cutting depth model is L = η × N × l × F × S × D, where η is the unknown coefficient, N is the motor speed, l is the width, F is the driving force, S is the feed rate, and D is the diameter of the saw blade.

[0064] The end of the synchronous multi-track cutting device 100 is equipped with a water cooling pipeline 110, whose main function is to cool down the saw during cutting.

[0065] like Figure 2 As shown, the multi-purpose demolition drilling device 200 is arranged at the front part of the cantilever tunnel boring machine body, and is located below the synchronous multi-track cutting device 100.

[0066] The whole machine part of the multi-purpose demolition drilling device 200 can refer to the main structure of the cantilever tunnel boring machine, retaining the advantages and strengths of the cantilever tunnel boring machine. The optimization of the original cantilever tunnel boring machine main structure is mainly in the following two aspects:

[0067] One is that the main machine bed is redesigned and modified, and a rotatable base 101 is added to set up a synchronous multi-track cutting device 100.

[0068] like Figure 4 As shown, secondly, a quick-change joint 201 is added to the front end of the excavation boom, and the quick-change joint 201 can quickly and conveniently replace the boom excavator cutting head 202 and the hydraulic breaker 203. Of course, the ends of the excavator cutting head 202 and the hydraulic breaker 203 are also provided with a docking piece that matches the quick-change joint 201. Such a design can adjust the working tools according to actual needs, so as to achieve efficient excavation.

[0069] The control system 300 is used to control the synchronous multi-track cutting device 100 and the multi-purpose demolition drilling rig device.

[0070] The specific mode is: the parameters of the face are obtained, the control system 300 designs the work process according to the working area, firstly the multi-track cutting device 100 works synchronously, and according to the cutting depth mathematical model, the device outputs a set of matching parameters.

[0071] In this embodiment, the saw first cuts out half of the tunnel face, and cuts at fixed intervals as needed, first vertically and then horizontally. After cutting half of the area, the saw moves to the other side, and the tunnel boring machine excavates along the prefabricated cut. The saw on the other side cuts simultaneously according to the new cutting program.

[0072] Of course, in other embodiments, the cutting may be performed horizontally first and then vertically. Or the cutting may be performed diagonally, which is not limited to the above scheme. The left half may not be cut first, and the cutting may be performed in the upper and lower parts.

[0073] Similarly, in other embodiments, the working area may not be divided into half, but only needs to be divided into several parts.

[0074] If the saw and the excavation system interfere with each other in the above-mentioned cutting process, grid cutting is performed first to generate prefabricated cracks. The excavation part works later. If interference occurs at this time, the saw rotates 180 degrees to give the excavation position to the excavation system. The entire operation and feedback control system 300 is easy to operate, safe and efficient.

[0075] The synchronous multi-track cutting device 100 of the tunnel boring machine is equipped with a rock strength test and identification system. Before cutting, the saw is used for pre-processing. The rock strength and integrity can be measured by the motor torque and propulsion force obtained during the cutting pre-processing. The specific rock strength prediction model is P = η * N * F, where η is the coefficient to be determined, N is the motor torque, and F is the propulsion force. According to the rock strength and rock integrity, the saw tooth spacing model is increased. Where P is the rock strength, η is the unknown coefficient, and the unknown coefficient varies depending on the hardness of the rock. The unknown system can be set based on experiments or experience.

[0076] The control system 300 gives feedback on whether to cut or not cut according to the specific value of the rock strength. When the rock strength is less than 60 MPa, the synchronous multi-track cutting device 100 does not need to work. After rotating 180°, the demolition device moves forward to demolition. When the rock strength is greater than 60 MPa, the synchronous multi-track cutting device 100 cuts the left half according to the preset program. After the cutting, the demolition device follows up to demolish the left half. At the same time, the synchronous multi-track cutting device 100 cuts the right half to produce a deep cut. The two work together and are used synchronously and cross-wise.

[0077] In other embodiments, the set value of rock strength is not necessarily 60 MPa and can be adjusted according to circumstances.

[0078] Embodiment 2

[0079] The working method of the first embodiment includes the following steps:

[0080] Move the entire equipment into the tunnel environment that needs to be broken through, and connect the power supply and other infrastructure required by the equipment.

[0081] Turn on the control system 300 of the whole device. After the preparation work is completed, drive the equipment to the tunnel face, turn on the synchronous multi-track cutting device 100, and use the control system 300 to drive the synchronous multi-track cutting device 101 to rotate, so that the cutting saw blade 108 moves to the right half of the face.

[0082] The primary oil cylinder 105 and the secondary oil cylinder 106 can be adjusted so that the saw blade 108 can perform cutting on the tunnel face in a set posture.

[0083] The sawing power motor 109 drives the saw blade 108 to rotate for pre-processing cutting, and the rock strength is specifically measured according to the cutting torque and thrust. The prediction model of rock strength is P=η*N*F, where η is the unknown coefficient, N is the torque of the motor, and F is the thrust.

[0084] According to the rock strength, if the rock strength is less than 60 MPa, stop using the synchronous multi-track cutting device 100. If the rock strength is greater than 60 MPa, use the synchronous multi-track cutting device 100 for cutting, and use the multi-purpose demolition drilling device 200 to obtain the best demolition cooperation.

[0085] After the preprocessing is completed, the spacing model of the saw cutting trajectory can be obtained based on the rock strength parameters. The softer the rock, the larger the cutting spacing; the harder the rock, the smaller the cutting spacing. The specific cutting spacing mathematical model is Where P is the rock strength and η is the unknown coefficient. The unknown coefficient varies depending on the hardness of the rock.

[0086] During the sawing process, cold water cools the saw blade 108 through the water cooling pipe 110 to improve the cutting efficiency.

[0087] After the control system 300 is adjusted according to the above process, the construction continues. Figure 5 As shown, the synchronous multi-track cutting device 100 is moved to the left side for construction, and the multi-purpose demolition drilling device 200 is allowed to perform the partial construction where the cutting is completed on the right side. Collaborative construction improves efficiency. The multi-purpose demolition drilling device 200 can quickly replace the hydraulic breaker 203 or the cantilever tunneling machine cutting head 202 according to the demolition needs.

[0088] If the multi-purpose demolition drilling device 200 encounters interference during construction, the synchronous multi-track cutting device 100 can rotate 180° to bypass the equipment and avoid construction interference. Figure 5As shown, the synchronous multi-track cutting device 100 can cut horizontally or vertically, or cut at a certain angle as needed. The control system 300 controls the entire process, so that the synchronous multi-track cutting device 100 and the multi-purpose demolition drilling device 200 cooperate with each other and perform construction, thereby improving actual work efficiency.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present invention without creative labor shall be included in the protection scope of the present invention.

Claims

1. A new type of sawing combined with cantilever excavation device, characterized in that: It includes a cantilever tunneling machine body, on which a synchronous multi-track cutting device, a multi-purpose demolition drilling device and a control system are arranged, wherein: The synchronous multi-track cutting device includes a rotatable base, an execution arm, a rotating device and a saw assembly, wherein the rotatable base is arranged on the cantilever tunneling machine body, one end of the execution arm is arranged on the rotatable base, and the rotatable base can drive the execution arm to rotate in the horizontal direction to change the working direction of the execution arm; The execution arm is provided with an adjustment mechanism, which can realize the movement and adjustment of the execution arm in the vertical direction; The other end of the execution arm is connected to the saw assembly through a rotating device, and the angle between the saw assembly and the execution arm is adjusted through the rotating device to adjust the cutting angle; The multi-purpose demolition drilling device comprises a cantilever, and a butt joint is provided at the end of the cantilever, and the butt joint is used for detachably connecting a cutting head or a breaker hammer; The control system is used to control the actions of the synchronous multi-track cutting device and the multi-purpose demolition and drilling device, and to control the cutting, demolition and / or drilling processes according to the operation requirements.

2. A new type of sawing combined with cantilever excavation device as claimed in claim 1, characterized in that: The rotatable base includes a first gear, a second gear, a driving mechanism and a bearing, the first gear is fixed to the cantilever tunneling machine body through the bearing, and the execution arm is arranged on the first gear; The first gear and the second gear are meshed, and the second gear is fixed to the output shaft of the driving mechanism. The driving mechanism is arranged on the cantilever tunneling machine body. The driving mechanism is used to drive the second gear to rotate. The rotation of the second gear drives the first gear to rotate, and then drives the execution arm to rotate in the horizontal direction.

3. A new type of sawing combined with cantilever excavation device as claimed in claim 1, characterized in that: The execution boom includes a base, a boom part and a terminal part, and the parts are rotatably connected through a rotating shaft. The base is arranged on the cantilever tunneling machine body, one end of the boom part is connected to the base, and the other end is connected to the terminal part; The adjustment mechanism includes two graded control cylinders, wherein the first-level cylinder is arranged between the base and the boom part, and is used to control the up and down adjustment of the boom part; the second-level cylinder is arranged between the boom part and the end part, and is used to control the displacement adjustment of the end part. The first-stage oil cylinder controls the up and down adjustment under the large position range, which can realize the movement of large displacement; the second-stage oil cylinder controls the small range adjustment of the cutting saw device at the end of the actuator to realize more precise regulation; through the mutual cooperation of the above two oil cylinders, the up and down movement of the cutting saw at the cutting end is realized; A rotating device is arranged at the top end of the end portion, and the saw assembly is arranged at the end of the rotating device.

4. A new type of sawing combined with cantilever excavation device as claimed in claim 1, characterized in that: The saw assembly comprises a connecting shaft, a saw power motor and a saw blade, wherein the connecting shaft is arranged at the end of the rotating device, the saw power motor is arranged on the connecting shaft, and a saw blade is arranged at each end of the connecting shaft, and the saw power motor is used to drive each saw blade to cut synchronously; The connecting shaft is a hollow structure, and the sawing power motor is arranged inside the hollow structure; Alternatively, a water cooling pipeline is also provided on the execution arm to cool the saw assembly when cutting.

5. A new type of sawing combined with cantilever excavation device as claimed in claim 1, characterized in that: The diameter of the saw blade is determined according to the kerf depth; The spacing of the saw blades is determined according to the rock strength.

6. A new type of sawing combined with cantilever excavation device as claimed in claim 1, characterized in that: The synchronous multi-track cutting device is provided with a rock strength test identification system, which is used to calculate the rock strength and integrity according to the motor torque and propulsion force during cutting. The calculation process is P=η*N*F, where η is a coefficient to be determined, N is the torque of the motor, and F is the propulsion force; Alternatively, the multi-purpose demolition drilling device is arranged at the front part of the cantilever tunnel boring machine body, below the synchronous multi-track cutting device.

7. A new type of sawing and cantilevered excavation device as claimed in claim 1, characterized in that: The control system is configured to set an operation process according to the rock strength of the tunnel face: when the rock strength is less than a set value, the synchronous multi-track cutting device is controlled to rotate to a preset angle and move to a preset position without interfering with the operation of the multi-purpose demolition drilling device; When the rock strength is greater than the set value, the synchronous multi-track cutting device is controlled to cut in a partial area of ​​the face. After the cutting of this partial area is completed, the synchronous multi-track cutting device is controlled to move to another partial area to work, and the multi-purpose demolition drilling device is controlled to demolish and / or excavate along the prefabricated cutting seam in the partial area where the cutting is completed.

8. The working method of the new sawing combined cantilever excavation device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Obtain rock strength data at the tunnel face; When the rock strength is less than the set value, the synchronous multi-track cutting device is controlled to rotate to a preset angle and move to a preset position without interfering with the operation of the multi-purpose demolition drilling device; When the rock strength is greater than the set value, the synchronous multi-track cutting device is controlled to cut in a partial area of ​​the face. After the cutting of this partial area is completed, the synchronous multi-track cutting device is controlled to move to another partial area to work, and the multi-purpose demolition drilling device is controlled to demolish and / or excavate along the prefabricated cutting seam in the partial area where the cutting is completed.

9. The working method according to claim 8, characterized in that: If the synchronous multi-track cutting device and the multi-purpose demolition drilling device interfere with each other, first control the synchronous multi-track cutting device to perform grid cutting to produce prefabricated cracks, and then control the multi-purpose demolition drilling device to work. If interference still occurs at this time, control the synchronous multi-track cutting device to move and / or rotate to make room for the excavation position for the multi-purpose demolition drilling device.

10. The working method according to claim 8, characterized in that: The cutting depth model of the synchronous multi-track cutting device is L=η×N×l×F×S×D, where η is the unknown coefficient, N is the motor speed, l is the width, F is the travel propulsion force, S is the feed rate, and D is the diameter of the saw blade.

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