CN217712553U

CN217712553U - Shaft drilling machine

Info

Publication number: CN217712553U
Application number: CN202222038820.2U
Authority: CN
Inventors: 赵闪; 白中坤; 毕程程; 郭江龙; 王亚威; 任韶鹏; 赵修旺; 朱毅; 郭宗豪
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-11-01
Anticipated expiration: 2032-08-03

Abstract

The utility model provides a shaft drilling machine, this shaft drilling machine includes: the main driving system comprises a cutter head, a main beam, a main driving system, a supporting system and a lifting system, wherein the cutter head is connected with the supporting system through the main beam; the main driving system is connected with the cutter head and is used for driving the cutter head to rotate; the lifting system is connected with the supporting system or the main beam and used for lifting the supporting system upwards. Through the utility model discloses, the easy cracked technical problem of drilling rod of the rig of upwards construction shaft among the prior art has been solved.

Description

Shaft drilling machine

Technical Field

The utility model relates to a technical field of shaft construction especially relates to a shaft drilling machine.

Background

The common method of shaft boring is a mechanical rock drilling blasting method, drilling holes are drilled in rock bodies, and explosives are filled in the holes to blast and break the rocks, however, the construction method generates rock fragments and muck during blasting, and the cleaning is extremely difficult; the explosion range is difficult to control, the formed excavation surfaces are different in size, and the later treatment is difficult; meanwhile, toxic gas generated by explosion is extremely harmful, ventilation needs to be done in time, and the tunneling efficiency is extremely low.

Chinese patent application CN201310677132.3 discloses a full-face shaft drilling machine, which mainly utilizes a tunneling system to tunnel downwards from the ground, solving the difficult problem that the explosion range of traditional mechanical rock drilling and blasting is difficult to control, but a personnel and material transportation system lifts generated broken stones and waste residues to the ground, the cleaning is very difficult, transportation and lifting are needed, the construction efficiency is affected, and the equipment is very complex.

The Chinese patent application CN201110412546.4 discloses a comprehensive shaft sinking method for a forward shaft and a reverse shaft, wherein a shaft drilling machine reversely tunnels from a roadway to the ground, and the problem of difficulty in slag removal is solved. However, in the solution disclosed in this application, the drill bit is powered by a drill rod, and the drill rod needs to provide both an upward pulling force and a torque generated by the drill bit, which is very likely to cause breakage of the drill rod, and the requirement on the material of the drill rod is particularly high.

Therefore, it is necessary to design a shaft device which is simple in slag removal and has low requirements on the material of the drill rod.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a shaft drilling machine to solve the easy cracked technical problem of drilling rod of the rig of upwards constructing the shaft among the prior art.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a shaft drilling machine, include: the main driving system comprises a cutter head, a main beam, a main driving system, a supporting system and a lifting system, wherein the cutter head is connected with the supporting system through the main beam; the main driving system is connected with the cutter head and is used for driving the cutter head to rotate; the lifting system is connected with the supporting system or the main beam and used for lifting the supporting system upwards.

In a preferred embodiment, the lifting system comprises a drill rod and a lifting mechanism, the lifting mechanism is mounted on the ground, the upper end of the drill rod is connected with the lifting mechanism, the lower end of the drill rod is connected with the support system or the main beam, and the lifting mechanism can lift the drill rod upwards.

In a preferred embodiment, the hoisting mechanism comprises a shaft derrick, a shaft hoist and a pulley mechanism, the pulley mechanism is mounted on the shaft derrick, and the shaft hoist is connected with the drill rod through the pulley mechanism to hoist the drill rod upwards.

In a preferred embodiment, the drill pipe comprises a drill pipe threaded interface and a plurality of drill pipe sub, and adjacent drill pipe sub are connected through the drill pipe threaded interface.

In a preferred embodiment, the support system is capable of securing the shaft drilling rig to the wall of the borehole; the shaft drilling machine comprises a propulsion system connected with the main beam, and the propulsion system is used for driving the main beam to move up and down relative to the supporting system.

In a preferred embodiment, the propulsion system includes a plurality of oblique cylinders, one end of each oblique cylinder is connected to the support system, the other end of each oblique cylinder is connected to the main beam, and the oblique cylinders are circumferentially distributed around the main beam.

In a preferred embodiment, the propulsion system comprises a vertical oil cylinder, the main beam is mounted at the upper end of the vertical oil cylinder, and the lower end of the vertical oil cylinder is fixedly connected to the supporting system.

In a preferred embodiment, the supporting system comprises a stabilizing frame, a supporting shoe and a supporting hydraulic oil cylinder, the main beam is installed on the stabilizing frame, one end of the supporting hydraulic oil cylinder is fixedly connected to the stabilizing frame, the supporting shoe is installed at the other end of the supporting hydraulic oil cylinder, and the supporting hydraulic oil cylinder can drive the supporting shoe to move outwards to be tightly supported on a well wall.

In a preferred embodiment, a plurality of cutterhead pipe barrels are arranged on the lower side of the cutterhead, the cutterhead pipe barrels are inclined towards the center from the upper end to the lower end, and rock soil cut by the cutterhead can be discharged downwards through the cutterhead pipe barrels.

In a preferred embodiment, the main beam is provided with a slag discharge inlet channel, and rock soil discharged through the cutter head pipe barrel can be output to a roadway through the slag discharge inlet channel.

The utility model discloses a characteristics and advantage are:

the shaft drilling machine is assembled in a roadway, and the lifting system is arranged on the ground and fixedly connected with the supporting system; the cutter head rotates under the driving of the main driving system and tunnels upwards. Through this shaft rig, can realize following the tunnel to ground backward tunnelling, detritus and dregs can drop to the tunnel downwards, have saved personnel and material transport system and have promoted the rubble and the waste residue that produce to the operation on ground, have solved the problem of rubble and waste residue clearance difficulty. In the shaft drilling machine, the power for rotating the cutter head is provided by the main driving system, the lifting system is responsible for lifting the cutter head and the supporting system upwards, the cutter head does not need to rotate together with the cutter head, the lifting system only needs to provide upward pulling force, and the difficult problem that in the prior art, a drill rod needs to rotate to provide the power for the cutter head, so that the drill rod bears huge torque, and the problem of breakage is easily caused is solved.

Drawings

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

Fig. 1-3 are working process diagrams of a shaft drilling machine provided by the invention;

fig. 4 is a schematic structural diagram of an embodiment of the shaft drilling machine provided by the present invention;

fig. 5 is a schematic structural diagram of another embodiment of the shaft drilling machine provided by the present invention;

fig. 6 is the structural schematic diagram of the main beam and the stabilizing frame in the shaft drilling machine provided by the present invention.

The reference numbers illustrate:

5. a cutter head; 51. a cutter head cutter; 52. a cutter head pipe barrel;

6. a main drive system;

7. a main beam; 7-1, a slag discharge inlet channel; 7-2, a cutter head connecting plate;

40. a lifting system;

200. a lifting mechanism; 2. a shaft hoist; 20. a pulley mechanism; 21. a fixed pulley; 22. a rope; 23. a movable pulley;

4. a drill stem; 41. a drill rod threaded interface; 42. a drill pipe nipple;

1. a shaft derrick; 110. a cross beam; 120. inclining the support frame;

80. a propulsion system; 8. an oblique oil cylinder; 15. a vertical oil cylinder;

90. a support system; 9. a stabilizer frame; 9-1, stabilizing the cylinder wall of the frame;

10. supporting the boot; 11. supporting a hydraulic oil cylinder;

3. fixing the locking device;

12. a roadway; 13. a rock mass; 14. crushed rock and muck.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a shaft drilling machine, as shown in fig. 4-5, this shaft drilling machine includes: the device comprises a cutter head 5, a main beam 7, a main driving system 6, a supporting system 90 and a lifting system 40, wherein the cutter head 5 is connected with the supporting system 90 through the main beam 7; the main driving system 6 is connected with the cutter head 5 and is used for driving the cutter head 5 to rotate; the lifting system 40 is connected to the support system 90 or the main beam 7 for lifting the support system 90 upwards. As shown in fig. 1-3, the shaft drilling machine is assembled in the roadway 12, and the lifting system 40 is installed on the ground and fixedly connected with the supporting system 90; the cutter head 5 is driven by the main driving system 6 to rotate, the cutter head 5 tunnels upwards, and cut rock fragments and dregs 14 fall down to the roadway 12. Through the shaft drilling machine, reverse tunneling from the roadway 12 to the ground can be realized, broken rocks and waste soil 14 can fall downwards to the roadway 12, the operation that personnel and a material transportation system lift generated broken rocks and waste residues to the ground is omitted, and the problem that the broken rocks and the waste residues are difficult to clean is solved. In the shaft drilling machine, the power for rotating the cutter head 5 is provided by the main driving system 6, the lifting system 40 is responsible for lifting the cutter head 5 and the supporting system 90 upwards, the rotation along with the cutter head 5 is not needed, the lifting system 40 only needs to provide upward pulling force, and the difficult problem that in the prior art, a drill rod needs to rotate to provide the power for the cutter head 5, so that the drill rod bears huge torque, and the drill rod is easy to break is solved.

The cutter head 5 is provided with a cutter head cutter 51, in one embodiment, the cutter head 5 is a conical cutter head, which is beneficial to realizing more efficient tunneling, in the process of upward tunneling, the conical cutter head performs reaming to the periphery from a disturbed stratum around the existing drilled hole, the soil pressure born by the conical cutter head is smaller, and the efficiency is more efficient.

As shown in fig. 1-3, the support system 90 is capable of securing the shaft drilling rig to the wall of the borehole; the shaft drilling machine comprises a propulsion system 80 connected with the main beam 7, wherein the propulsion system 80 is used for driving the main beam 7 and the cutterhead 5 to move up and down relative to a supporting system 90. After the shaft drilling machine is installed in a roadway 12, firstly, the shaft drilling machine is fixed on a well wall by a supporting system 90, then a cutter head 5 rotates under the driving of a main driving system 6, and meanwhile, a main beam 7 and the cutter head 5 are driven by a propelling system 80 to move upwards to realize upwards tunneling; when the propulsion system 80 reaches the maximum propulsion length, the driving is stopped, the hoisting system 40 provides a pulling force to pull the shaft drilling machine, and the supporting system 90 and the propulsion system 80 are contracted, and the hoisting system 40 hoists the shaft drilling machine as a whole upwards to complete a cycle of footage.

In one embodiment, the lifting system 40 comprises a drill rod 4 and a lifting mechanism 200, the lifting mechanism 200 being mounted at the surface, the upper end of the drill rod 4 being connected to the lifting mechanism 200, the lower end of the drill rod 4 being connected to the support system 90 or the main beam 7, the lifting mechanism 200 being capable of lifting the drill rod 4 upwards. As shown in fig. 1 and 4, in the upward tunneling process, the support system 90 bears the reaction torque of the rotary drive of the cutter head 5, the drill rod 4 is fixed on the support system 90, the drill rod 4 does not rotate and does not need to resist the torque generated by the rotation of the cutter head 5, the drill rod 4 only provides the pulling force required by the upward lifting of the shaft drilling machine, and the requirement on the material of the drill rod 4 is low. The shaft drilling machine is suitable for deep drilling, more economical and practical, and easy to realize. In the shaft drilling machine, the drill rod 4 also provides a directional effect, the tunneling direction of the cutter head 5 can be controlled through the drill rod 4, the shaft drilling machine drills along the direction of the drill rod 4, the size and the shape of a formed shaft are more regular, and the deviation is reduced.

As shown in fig. 1 to 3, the lifting mechanism 200 includes a shaft derrick 1, a shaft hoist 2, and a pulley mechanism 20, the pulley mechanism 20 being installed at the shaft derrick 1, the shaft hoist 2 being connected with a drill rod 4 through the pulley mechanism 20 to lift the drill rod 4 upward. Specifically, the shaft derrick 1 comprises an inclined support frame 120 and a cross beam 110, wherein two ends of the cross beam 110 are fixedly connected with the inclined support frame 120 positioned at the two ends thereof; the pulley mechanism 20 comprises a fixed pulley 21, a movable pulley 23 and a rope 22, the fixed pulley 21 is fixedly arranged on the cross beam 110, one end of the rope 22 is wound on the shaft hoist 2, and the other end of the rope 22 is fixed on the cross beam 110 after sequentially passing through the fixed pulley 21 and the movable pulley 23 arranged at the upper end of the drill rod 4. During construction, firstly, an unstable ground layer is excavated, and concrete is poured to form a foundation for installing the vertical shaft derrick 1 and the fixed locking device 3. During the lifting or lowering of the drill rod 4, the stationary locking device 3 may perform a retraction to secure the drill rod 4, thereby performing an extension or shortening of the drill rod 4.

Further, the drill rod 4 comprises a drill rod threaded interface 41 and a plurality of drill rod short sections 42, as shown in fig. 4, the adjacent drill rod short sections 42 are connected through the drill rod threaded interface 41, the drill rod short sections 42 are in threaded rotation butt joint through the drill rod threaded interface 41, and are connected in sections, so that the drilling depth can be effectively increased.

As shown in fig. 4, the propulsion system 80 includes a plurality of oblique cylinders 8, one end of each oblique cylinder 8 is connected to the support system 90, the other end of each oblique cylinder 8 is connected to the main beam 7, the plurality of oblique cylinders 8 are distributed around the main beam 7 in the circumferential direction, and when the oblique cylinders 8 make telescopic motion, the main beam 7 is driven to move up and down relative to the support system 90.

In another embodiment, the propulsion system 80 includes a vertical oil cylinder 15, as shown in fig. 5, the main beam 7 is installed at the upper end of the vertical oil cylinder 15, the lower end of the vertical oil cylinder 15 is fixedly connected to the support system 90, the vertical oil cylinder 15 generates a vertical upward thrust to the cutter head 5, the thrust is more uniform, and the formed vertical shaft is more regular and good; and the vertical oil cylinder 15 can provide propulsion for a longer distance, so that the number of times of circulating footage can be effectively reduced, and the efficiency is higher. In this embodiment, the cut crushed rock and muck 14 can be dropped into the roadway 12 in a free-flowing slag manner.

The cutterhead 5 and the main drive system 6 are secured to the main beam 7. As shown in fig. 4, the supporting system 90 includes a stabilizing frame 9, supporting shoes 10 and a supporting hydraulic cylinder 11, the main beam 7 is mounted on the stabilizing frame 9, one end of the supporting hydraulic cylinder 11 is fixedly connected to the stabilizing frame 9, the supporting shoes 10 are mounted at the other end of the supporting hydraulic cylinder 11, and the supporting hydraulic cylinder 11 can drive the supporting shoes 10 to move outwards to be tightly supported on the well wall. The supporting hydraulic oil cylinder 11 drives the supporting shoe 10 to act on the well wall so as to support the gravity action of the whole shaft drilling machine and generate an acting point of the propulsion system 80, and the inclined oil cylinder 8 or the vertical oil cylinder 15 in the propulsion system 80 pushes the main beam 7 and the cutter head 5 to tunnel upwards under the supporting action of the supporting shoe 10. One end of the inclined oil cylinder 8 is connected to the drill main beam 7, and the other end is connected to the supporting shoe 10. Further, the support system 90 includes four sets of circumferentially distributed shoes 10 and supporting hydraulic rams 11. One end of the drill rod 4 is connected to the movable pulley 23, and the other end of the drill rod passes through the rock mass 13 by means of drilling, passes through the cutterhead 5 and the main beam 7 and is fixed on the stabilizing frame 9. In the process of upward tunneling, the supporting shoes 10 bear the reaction torque of the rotary driving of the cutter head 5, the drill rod 4 is fixed on the stabilizing frame 9, the generated reaction torque does not need to be resisted, and the requirement on the material of the drill rod 4 is greatly reduced. The central shaft of the cutter head can be a hollow shaft, and the drill rod 4 can penetrate through the cutter head 5 and then be fixed on the stabilizing frame 9. The main drive system 6 is typically distributed around the shield body with the drill rod 4 passing through it from a central location.

In an embodiment, a plurality of cutterhead pipe barrels 52 are arranged on the lower side of the cutterhead 5, as shown in fig. 4, the cutterhead pipe barrels 52 are inclined from the upper end to the lower end to the center, rock soil cut by the cutterhead 5 can be discharged downwards through the cutterhead pipe barrels 52, in the upward drilling process of the shaft drilling machine, the cutterhead 5 cuts the rock body 13, and crushed rock and muck 14 are conveyed to the roadway 12 through the cutterhead pipe barrels 52, so that mechanical equipment such as a forklift in the roadway 12 can be cleaned conveniently.

The top of the main beam 7 is provided with a cutter head connecting plate 7-2. Further, the main beam 7 is provided with a slag discharge inlet channel 7-1, and in the drilling process, the cutter head pipe barrel 52 collects the crushed rocks and the slag 14 into the main beam 7, and the crushed rocks and the slag 14 fall into the roadway 12 along the slag discharge inlet channel 7-1 of the main beam 7. The main beam 7 is a cylindrical hollow cylinder, and the drill rod 4 can freely pass through the cylindrical hollow cylinder. As shown in fig. 6, the stabilizing frame 9 is a cylindrical tube, the middle part is hollow, and the slag can freely fall along the tube cavity for slag discharge; the stabilizing frame cylinder wall 9-1 is relatively thick and is used for supporting the hydraulic supporting oil cylinder 11 to be pressed against the rock wall.

The following takes the shaft boring machine shown in fig. 4 as an example, and the boring step thereof is specifically described:

s1, firstly, drilling a hole from the ground to a roadway 12, wherein in the drilling process, the whole geological information of a vertical shaft can be judged according to a core or muck which is taken out, an advanced geological prediction is formed for the stratum of the subsequent vertical shaft construction, and reference is provided for the selection of a cutter head tool 51;

s2, transporting the cutter head 5, the main driving system 6, the main beam 7, the stabilizing frame 9 and other parts of the shaft drilling machine to a roadway 12 for assembly, and fixedly connecting the cutter head with the drill rod 4, wherein in order to meet the requirement that the shaft drilling machine enters a rock body 13, a proper amount of blasting can be utilized to finish the first footage of the drilling machine;

s3, lifting the shaft drilling machine from a roadway 12 into a rock body 13 by using the drill rod 4, and supporting the supporting shoe 10 by using the supporting hydraulic oil cylinder 11 to be supported on a well wall so as to counteract the gravity action of the whole shaft drilling machine and generate an acting point of the inclined oil cylinder 8;

s4, the main beam 7, the main driving system 6 and the cutter head 5 are pushed by the inclined oil cylinder 8 to be integrally tunneled upwards, the tunneling direction of the cutter head 5 is controlled through the drill rod 4, and the main driving system 6 drives the cutter head 5 to rotate to perform tunneling towards an upper vertical shaft; in the process of upward tunneling, the supporting shoes 10 bear and offset the reaction torque of the rotary driving of the cutter head 5, and the crushed rocks and the slag 14 fall into the roadway 12 along the main beam 7;

s5, when the inclined oil cylinder 8 reaches the maximum propelling length, the tunneling is stopped, the drill rod 4 provides pulling force to pull the shaft drilling machine, the inclined oil cylinder 8 and the supporting hydraulic oil cylinder 11 contract to prepare for the next footage, the crushed rock and the muck 14 falling into the roadway 12 are cleared by using mechanical equipment such as a forklift;

and S6, repeating S3-S5, and continuously tunneling upwards until the project is finished.

The shaft drilling machine has the following advantages:

(1) The reverse drilling from the roadway 12 to the ground is realized, and the generated crushed rock and muck 14 directly fall off the roadway 12 in the process that the cutter head 5 cuts the rock body 13, so that mechanical equipment such as a forklift can be used for cleaning, and the cleaning is more convenient;

(2) The rock fragments and the muck 14 are collected into the main beam 7 by using the cutter head pipe barrel 52 and fall into the roadway 12 along the main beam 7;

(3) The drill rod 4 does not need to rotate, torque generated by rotation of the cutter head 5 does not need to be resisted, only tension required by equipment lifting is provided, and the requirement on the material of the drill rod 4 is greatly reduced, so that the vertical shaft drilling machine is suitable for deep drilling, a large amount of funds are saved, and the vertical shaft drilling machine is more economical and practical;

(4) The drill rod 4 provides a directional effect for the vertical shaft drilling machine, the vertical shaft drilling machine drills along the direction of the drill rod 4, the size and the shape of a formed vertical shaft are more regular, the occurrence of deviation is reduced, and the quality of the vertical shaft is improved;

(5) The conical cutter head 5 is adopted, and hole expansion is carried out from the disturbed stratum around the existing drill hole to the periphery, so that the soil pressure born by the conical cutter head 5 is smaller, and the efficiency is more efficient;

(6) In the process of drilling, the overall geological information of the shaft can be judged according to the core or the muck taken out, an advanced geological prediction is formed for the stratum of the subsequent shaft construction, reference is provided for selection of the cutter head tool 51 and the drilling machine component, and the engineering risk is effectively prevented.

(7) The vertical shaft drilling machine is lighter and simpler in mechanism, easy to splice and assemble, less in transportation and transfer limitation and capable of improving field realizability.

The above description is only for a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the disclosure of the present application.

Claims

1. A shaft drilling machine, characterized by comprising: the main driving system comprises a cutter head, a main beam, a main driving system, a supporting system and a lifting system, wherein the cutter head is connected with the supporting system through the main beam; the main driving system is connected with the cutter head and is used for driving the cutter head to rotate; the lifting system is connected with the support system or the main beam and is used for lifting the support system upwards.

2. A shaft drilling machine according to claim 1, characterized in that the hoisting system comprises a drill rod and a hoisting mechanism, the hoisting mechanism being mounted on the ground, the upper end of the drill rod being connected to the hoisting mechanism, the lower end of the drill rod being connected to the support system or main beam, the hoisting mechanism being capable of hoisting the drill rod upwards.

3. A shaft drilling rig as claimed in claim 2, characterized in that the hoisting mechanism comprises a shaft derrick, a shaft hoist and a pulley mechanism, which is mounted to the shaft derrick, the shaft hoist being connected with the drill rod via the pulley mechanism for hoisting the drill rod upwards.

4. A shaft drilling rig according to claim 2, wherein the drill pipe comprises a drill pipe threaded interface and a plurality of drill pipe sub sections, adjacent drill pipe sub sections being connected by the drill pipe threaded interface.

5. A shaft drilling machine according to claim 1, characterized in that the support system is capable of securing the shaft drilling machine to a wall of a well; the shaft drilling machine comprises a propulsion system connected with the main beam, and the propulsion system is used for driving the main beam to move up and down relative to the supporting system.

6. A shaft drilling rig according to claim 5, wherein the propulsion system comprises a plurality of tilt cylinders, one end of the tilt cylinders being connected to the support system and the other end of the tilt cylinders being connected to the main beam, the plurality of tilt cylinders being distributed circumferentially around the main beam.

7. A shaft drilling rig according to claim 5, characterised in that the propulsion system comprises a vertical cylinder, the main beam being mounted at the upper end of the vertical cylinder, the lower end of the vertical cylinder being secured to the support system.

8. The shaft drilling machine according to claim 1, wherein the supporting system comprises a stabilizing frame, a supporting shoe and a supporting hydraulic oil cylinder, the main beam is mounted on the stabilizing frame, one end of the supporting hydraulic oil cylinder is fixedly connected to the stabilizing frame, the supporting shoe is mounted at the other end of the supporting hydraulic oil cylinder, and the supporting hydraulic oil cylinder can drive the supporting shoe to move outwards to be tightly supported on the well wall.

9. A shaft drill according to claim 8, characterized in that the underside of the cutterhead is provided with a plurality of cutterhead tubes which are inclined towards the centre from the upper end to the lower end, through which the rock soil cut by the cutterhead can be discharged downwards.

10. A shaft drilling machine according to claim 9, characterized in that the main beam is provided with a slag discharge inlet channel through which rock soil discharged through the cutterhead pipe barrel can be output to a roadway.