Transverse shaft type cutting mechanism suitable for semi-coal rock roadway and heading machine

Abstract

The invention discloses a transverse shaft type cutting mechanism suitable for a semi-coal rock roadway and a heading machine. The cutting mechanism comprises a main frame, and a motor, a cutting head and a water spraying mechanism which are mounted on the main frame; the motor is used for driving the cutting head to rotate so as to carry out cutting operation; the cutting head comprises a cutting sleeve and a plurality of cutting teeth; the plurality of cutting teeth surround the peripheral wall of the cutting sleeve and are arranged into N spiral lines; the water spraying mechanism comprises a plurality of built-in water tanks and a plurality of nozzle groups which are respectively arranged on the plurality of built-in water tanks; the plurality of built-in water tanks extend along the axial direction of the cutting sleeve and are circumferentially distributed along the cutting sleeve; wherein the multiple built-in water tanks are sequentially divided into N sets of built-in water tanks in the circumferential direction of the cutting sleeve, and the multiple nozzle sets in each set of built-in water tanks sequentially deviate towards the end, with the small radius, of the cutting sleeve in the circumferential direction of the cutting sleeve. The problem that a cutting head of an existing cutting mechanism is poor in torque resistance is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cantilever type roadheader cutting head design, and in particular relates to a transverse axis cutting mechanism and roadheader suitable for semi-coal-rock tunnels. Background Art

[0002] Cantilevered tunnel boring machines can be divided into longitudinal-axis cutting heads and transverse-axis cutting heads according to the working form of the cutting head. The longitudinal-axis cutting head is a relatively mature component used in traditional cantilevered tunnel boring machines, but the transverse-axis cutting head has a higher cutting efficiency than the longitudinal-axis cutting head. The main differences and difficulties include the following: 1. Internal spray plays a key role in reducing the high temperature and dust generated during the cutting operation of the cutting teeth. The internal spray water channel of the longitudinal-axis cutting head usually enters from the outside of the reducer housing, passes through the inner cavity of the cutting spindle to reach the water cavity of the cutting head, and then sprays out through the cutting head nozzle. The transverse-axis cutting head is no longer connected to the cutting spindle but is directly connected to the transverse-axis reducer. Combined with the different appearance of the transverse-axis cutting head, there is no enclosed water cavity as large as the longitudinal-axis cutting head. Therefore, the internal spray method of the transverse-axis cutting head also changes accordingly. In order to achieve better cutting efficiency and tunnel support conditions, the horizontal axis cutting head is larger in appearance than the vertical axis cutting head, and is subjected to greater cutting torque, so the corresponding cutting head body and cutting tooth seat should also be different. Therefore, it is necessary to provide an efficient internal spray horizontal axis roadheader cutting head to solve the above problems. Summary of the invention

[0003] The purpose of the present disclosure is to provide a transverse-axis cutting mechanism and a roadheader suitable for semi-coal-rock tunnels, which can solve at least part of the above-mentioned technical problems.

[0004] The first aspect of the disclosed embodiment provides a transverse axis cutting mechanism suitable for semi-coal-rock tunnels, the cutting mechanism comprising a main frame and a motor, a cutting head and a water spray mechanism installed on the main frame, the motor being used to drive the cutting head to rotate for cutting operations; the cutting head comprising a cutting sleeve and a plurality of cutting teeth, the plurality of cutting teeth surrounding the outer peripheral wall of the cutting sleeve and arranged into N spiral lines; the water spray mechanism comprising a plurality of built-in water troughs and a plurality of nozzle groups respectively arranged on the plurality of built-in water troughs; the plurality of built-in water troughs all extend along the axial direction of the cutting sleeve and are distributed in a circular pattern along the cutting sleeve; wherein the plurality of built-in water troughs are divided into N groups of built-in water troughs in sequence along the circumferential direction of the cutting sleeve, and a plurality of nozzle groups in each group of built-in water troughs deviate in sequence toward the end of the cutting sleeve with a smaller radius along the circumferential direction of the cutting sleeve.

[0005] Optionally, each group of built-in water grooves includes a first water groove, a second water groove and a third water groove in sequence along the circumferential direction of the cutting sleeve, wherein one end of the nozzle group on the first water groove is located at the starting end of the first water groove, and the other end is located at the rear middle area of ​​the first water groove; one end of the nozzle group on the second water groove is located at the front middle area of ​​the second water groove, and the other end is located at the rear middle area of ​​the second water groove, and is closer to the end of the built-in water groove than the other end of the nozzle group of the first water groove; one end of the nozzle group on the third water groove is located at the front middle area of ​​the third water groove, and is farther away from the starting end of the built-in water groove than one end of the nozzle group of the second water groove, and its other end is located at the end of the third water groove.

[0006] Optionally, a plurality of water distribution pipes are provided in the built-in water tank, and the plurality of water distribution pipes are respectively connected one by one to the plurality of nozzles in the nozzle group.

[0007] Optionally, the cutting sleeve includes a front cylinder, a middle cylinder and a rear cylinder which are connected in sequence along the axial direction; wherein the front cylinder is a hemispherical surface, the diameter of the middle cylinder gradually increases, the diameter of the rear cylinder gradually decreases, and the minimum diameter of the rear cylinder is greater than the maximum diameter of the front cylinder.

[0008] Optionally, the front cylinder, the middle cylinder and the rear cylinder are welded together in sequence, and anti-shear pins are radially inserted at the welds.

[0009] Optionally, the pick includes a tooth seat, a retaining ring, and a pick-type pick; the bottom of the tooth seat is welded to the surface of the cutting sleeve by "J-type" groove welding, and the pick-type pick is installed on the tooth seat through the retaining ring; the tooth seat is forged from 20CrNiMo6 material.

[0010] Optionally, the nozzle includes a water spray seat and a nozzle, the water spray seat is welded to the surface of the cutting sleeve, and the nozzle is installed in the water spray seat and connected to the water outlet of the water distribution pipe.

[0011] Optionally, the nozzle further comprises a reinforcing rib, which is welded to the front side of the water spray seat along the rotation direction of the cutting head.

[0012] Optionally, a circle of wear-resistant plate is evenly welded at the small end of the root of the rear cylinder.

[0013] A second aspect of the disclosed embodiment provides a roadheader, which includes a transverse-axis cutting mechanism suitable for a semi-coal-rock tunnel as described above.

[0014] The main technical effects achieved by the embodiment of the present disclosure are as follows: when a conventional cutting head is provided with N spiral tooth bars, N built-in water grooves are generally also provided, and the N built-in water grooves all extend along the spiral direction of the tooth bars so as to be provided between the N built-in water grooves, so that the water mist sprayed from the nozzle can fully cover each tooth on the cutting head. However, on the one hand, this will cause the water path of the cutting head to be too long, the water pressure of the nozzle to be low, and the sprayed water mist to be not uniform enough. On the other hand, the built-in water groove that is too long will also damage the structure of the cutting sleeve, affecting the service life of the cutting head. Therefore, in the embodiment of the present disclosure, the extension direction of the built-in water groove is changed, that is, it extends along the axial direction of the cutting head. At the same time, the traditional longer built-in water groove is replaced with a plurality of shorter built-in water grooves, and the axial position of the nozzle group in each built-in water groove is different. Therefore, on the one hand, the nozzle sprayed from the water spray mechanism can fully cover the teeth on the cutting head. On the other hand, the built-in water groove is short and extends along the axial direction of the cutting head, which basically will not damage the structure of the cutting sleeve, thereby avoiding a decrease in the anti-torque capacity of the cutting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a transverse axis cutting mechanism suitable for a semi-coal-rock tunnel.

[0016] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0017] Figure 3 It is a schematic diagram of the structure of the cutting head.

[0018] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0019] Figure 5 for Figure 4 A local enlarged schematic diagram of point B in the middle.

[0020] Figure 6 Schematic diagram of the position of the nozzle on the cutting sleeve.

[0021] Figure 7 for Figure 6 Cross-sectional view at KK in the figure.

[0022] Figure 8 This is a schematic diagram of the water distribution pipe structure.

[0023] Fig. 9 It is a half-section view of the cutting sleeve.

[0024] Fig.10 for Fig. 9 Cross-sectional view at PP in the middle.

[0025] Fig.11 It is a structural diagram of the gear seat.

[0026] Fig.12 for Fig.11 Section view at QQ in the middle.

[0027] In the figure: 1. cutting head; 2. horizontal axis cutting reducer; 3. cutting teeth; 4. retaining ring; 5. grid ring; 51. groove; 6. end cover; 7. reducer housing; 8. screw; 9. cutting sleeve; 10. tooth seat; 11. wear-resistant plate; 12. water spray seat; 13. reinforcement rib; 14. water distribution pipe; 15. nozzle; 16. front cylinder; 17. rear cylinder; 21. middle cylinder; 18. anti-shear pin; 19. built-in water tank; 20. drainage hole; 191. first water tank; 192. second water tank; 193. third water tank. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The modes described in the following exemplary embodiments do not represent all modes consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limitation, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0030] like Figure 1 As shown; a transverse axis cutting mechanism suitable for semi-coal rock tunnels, a main frame and a motor, a cutting head 1, a water spray mechanism and a transverse axis cutting reducer 2 installed on the main frame.

[0031] There are two cutting heads 1, which are respectively used to be installed on the horizontal axis cutting reducer 2 and communicate with the built-in water channel of the horizontal axis cutting reducer 2. The horizontal axis cutting reducer 2 is installed in the reducer housing 7, and the two cutting heads 1 are symmetrically arranged on both sides of the horizontal axis cutting reducer 2.

[0032] The cutting head 1 includes a cutting sleeve 9 and cutting teeth 3, wherein the plurality of cutting teeth 3 surround the outer peripheral wall of the cutting sleeve 9 and are arranged into N spiral lines; the water spraying mechanism includes a plurality of built-in water grooves 19 and a plurality of nozzle groups 15 respectively arranged on the plurality of built-in water grooves 19; the plurality of built-in water grooves 19 all extend along the axial direction of the cutting sleeve 9 and are distributed in a circular pattern along the cutting sleeve 9; wherein the plurality of built-in water grooves 19 are divided into N groups of built-in water grooves 19 in sequence along the circumferential direction of the cutting sleeve 9, and the plurality of nozzle groups 15 in each group of built-in water grooves 19 deviate in sequence toward the end of the cutting sleeve 9 with a smaller radius in the circumferential direction of the cutting sleeve 9.

[0033] Considering that when a conventional cutting head 1 is provided with N spiral-shaped cutting teeth 3, N built-in water grooves 19 are generally provided, and the N built-in water grooves 19 all extend along the spiral direction of the cutting teeth 3 so as to be arranged between the N built-in water grooves 19, so that the water mist sprayed by the nozzle 15 can fully cover each cutting tooth 3 on the cutting head 1. However, on the one hand, this will cause the water path of the cutting head 1 to be too long, the water pressure of the nozzle 15 to be low, and the sprayed water mist to be uneven. On the other hand, the too long built-in water grooves 19 will also damage the structure of the cutting sleeve 9, affecting the service life of the cutting head 1. Therefore, in the embodiment of the present invention, the extension direction of the built-in water groove 19 is changed, that is, it extends along the axial direction of the cutting head 1. At the same time, the traditional longer built-in water groove 19 is replaced with a plurality of shorter built-in water grooves 19, and the axial positions of the nozzle 15 groups in each built-in water groove 19 are different. Therefore, on the one hand, the nozzles 15 sprayed by the water spraying mechanism can cover the cutting teeth 3 on the cutting head 1 in all directions. On the other hand, the built-in water groove 19 is shorter and extends along the axial direction of the cutting head 1, which basically does not damage the structure of the cutting sleeve 9, thereby avoiding a decrease in the anti-torque capability of the cutting sleeve 9.

[0034] As an optional embodiment, each group of built-in water grooves 19 includes a first water groove 191, a second water groove 192 and a third water groove 193 in sequence along the circumferential direction of the cutting sleeve 9, wherein one end of the nozzle group 15 located on the first water groove 191 is located at the starting end of the first water groove 191, and the other end is located at the rear middle area of ​​the first water groove 191; one end of the nozzle group 15 located on the second water groove 192 is located at the front middle area of ​​the second water groove 192, and the other end is located at the rear middle area of ​​the second water groove 192, and is closer to the end of the built-in water groove 19 than the other end of the nozzle group 15 of the first water groove 191; one end of the nozzle group 15 located on the third water groove 193 is located at the front middle area of ​​the third water groove 193, and is farther away from the starting end of the built-in water groove 19 than one end of the nozzle group 15 of the second water groove 192, and its other end is located at the end of the third water groove 193. By specifying the layout of each set of built-in water troughs 19, including the positions of the nozzles 15 of the first water trough 191, the second water trough 192 and the third water trough 193, the distribution of the water spray can be further optimized, making the water spray more uniform and concentrated on the key parts of the pick 3, thereby improving the cooling effect.

[0035] like Figure 1-4 As shown, a water distribution pipe 14 is fixed in the built-in water tank 19, and the water outlets on the water distribution pipe 14 are connected to the nozzles 15 one by one.

[0036] like Figure 2 , Figure 4As shown; the inner wall of the cutting sleeve 9 is provided with two circumferential grooves 51. The two grooves 51 are respectively located before and after the drainage hole 20 of the horizontal axis cutting reducer 2. A grid ring 5 is embedded in the groove 51. The inner ring of the grid ring 5 is sealed with the housing of the horizontal axis cutting reducer 2. The two grid rings 5 ​​seal the annular gaps before and after the drainage hole 20; the water inlet on the water distribution pipe 14 (such as Figure 8 The D port shown passes through the wall thickness of the cutting sleeve 9 and comes out from between the two Gly rings 5.

[0037] like Figure 1 , Figure 3 As shown; the cutting teeth 3 are fixed on the surface of the cutting sleeve 9 in an arrangement of 4 spiral lines and one tooth per line (one line and several teeth represent the number of cutting teeth 3 arranged in each layer. Generally, the number of teeth in one line and several teeth is an approximate multiple of the number of spiral lines. For example, if there are 3 spiral lines, there will be one line of teeth or 3 teeth; if there are 4 spiral lines, there will be one line of teeth or 2 teeth or 4 teeth). Each cutting head 1 contains 56 cutting teeth 3 to optimize the cutting efficiency.

[0038] like Figure 6 , Figure 7 As shown in the figure, there are 4 groups of built-in water tanks 19 distributed on the cutting head 1, and the nozzles 15 of a single group are arranged in a row along the length of the cutting sleeve 9, and the nozzle 15 groups are evenly arranged around the cutting sleeve 9. There are 12 rows of nozzles 15, each row contains 3 nozzles 15, and the number of built-in water tanks 19 is 12, and each built-in water tank 19 linearly connects the 3 nozzles 15 in the middle area of ​​the cutting sleeve 9, as shown in the figure. Figure 8 As shown; the water outlets A, B, and C on the water distribution pipe 14 are connected to the nozzles 15 in a one-to-one correspondence.

[0039] like Fig. 9 , Fig.10 As shown; the cutting sleeve 9 includes a front cylinder 16, a middle cylinder 21 and a rear cylinder 17 which are connected in sequence along the axial direction; wherein, the front cylinder 16 is a hemispherical surface, the diameter of the middle cylinder 21 gradually increases, the diameter of the rear cylinder 17 gradually decreases, and the minimum diameter of the rear cylinder 17 is greater than the maximum diameter of the front cylinder 16. The outer contour of the cutting sleeve 9 is composed of a small-angle inverted cone, a small-angle positive cone, and a small-radius arc, which can not only increase the cutting torque, but also minimize the corner coal and rock at the bottom of both sides of the tunnel while ensuring the flatness of the cutting bottom plate, thereby providing good construction conditions for the support process (effectively increasing the support range of the coal machine equipment at the bottom plate). In addition, the front cylinder 16, the middle cylinder 21, and the rear cylinder 17 are welded and connected in sequence, and anti-shear pins 18 are radially inserted at the weld to improve the shear resistance of the cutting sleeve 9 during rotation and cutting.

[0040] like Fig.11 , Fig.12As shown; the pick 3 includes a tooth seat 10, a retaining ring 4, and a pick-type pick 3. The tooth seat 10 is welded to the cutting sleeve 9 by multi-layer multi-pass welding. The bottom of the tooth seat 10 is welded to the surface of the cutting sleeve 9 by "J-shaped" groove welding. The pick-type pick 3 is installed on the tooth seat 10 through the retaining ring 4; the tooth seat 10 is made of 20CrNiMo material forgings, which has good impact resistance and wear resistance. The bottom of the tooth seat 10 is opened with a J-shaped groove to increase the welding strength, reduce the open welding rate at the rear end of the tooth seat 10 during the cutting process, and increase the effective life of the tooth seat 10.

[0041] like Figure 5 The nozzle 15 comprises a water spray seat 12 and a nozzle 15 . The water spray seat 12 is welded to the surface of the cutting sleeve 9 . The nozzle 15 is installed in the water spray seat 12 and is connected to the water outlet of the water distribution pipe 14 .

[0042] like Figure 6 As shown; it also includes a reinforcing rib 13, which is welded to the front side of the water spray seat 12 along the rotation direction of the cutting head 1. The reinforcing rib 13 is welded at the stress-bearing part of the water spray seat 12 to improve stability. Compared with the embedded nozzle 15, the water spray seat 12 can be adjusted in a wider range.

[0043] like Figure 1 , Figure 4 As shown, a circle of wear-resistant plate 11 is evenly welded at the small end of the root of the rear cylinder 17. The wear resistance of the small end of the root of the cutting sleeve 9 is improved, thereby reducing the probability of coal and rock debris entering the horizontal axis cutting reducer 2.

[0044] The cutting sleeve 9 is fastened to the output shaft of the horizontal axis reducer through an octagonal structure (a regular octagonal hole and a regular octagonal shaft matching structure, similar to a hexagonal connection), an end cover 6, and screws 8. It is easy to disassemble and assemble, and compared with the connection method of the longitudinal axis cutting head 1 and the cutting main shaft (commonly spline connection, flange connection, etc.), it improves the convenience of underground installation.

[0045] The internal spray working principle of the above-mentioned transverse-axis cutting mechanism suitable for semi-coal-rock tunnels is as follows: the external fluid flows into the sealed space formed by the two grid rings 5 ​​through the inherent fluid channel in the shell of the transverse-axis cutting reducer 2, and then flows to the water spray on the surface of the cutting sleeve 9 through the water distribution pipe 14 in the built-in water tank 19 on the cutting sleeve 9, and is sprayed in the form of mist to the surrounding of the tooth tip of the corresponding pick-type cutting tooth 3 through the nozzle 15 inside the water spray seat 12, thereby reducing the high temperature and dust generated by the pick-type cutting tooth 3 of the cutting head 1 during the cutting operation, which helps to improve the cutting efficiency and the service life of the pick-type cutting tooth 3.

[0046] The second aspect of the disclosed embodiment provides a roadheader, which includes a transverse axis cutting mechanism suitable for semi-coal-rock tunnels as described above. The roadheader is equipped with the transverse axis cutting mechanism, so that the roadheader can adapt to the complex environment of coal tunnels and semi-coal-rock tunnels, and improves the driving efficiency and cutting effect.

[0047] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A horizontal axis cutting mechanism suitable for semi-coal-rock roadway, characterized in that: The cutting mechanism includes a main frame and a motor, a cutting head and a water spray mechanism installed on the main frame, wherein the motor is used to drive the cutting head to rotate for cutting operations; the cutting head includes a cutting sleeve and a plurality of cutting teeth, wherein the plurality of cutting teeth surround the outer peripheral wall of the cutting sleeve and are arranged into N spiral lines; the water spray mechanism includes a plurality of built-in water grooves and a plurality of nozzle groups respectively arranged on the plurality of built-in water grooves; the plurality of built-in water grooves all extend along the axial direction of the cutting sleeve and are distributed in a circular pattern along the cutting sleeve; wherein the plurality of built-in water grooves are divided into N groups of built-in water grooves in sequence along the circumferential direction of the cutting sleeve, and a plurality of nozzle groups in each group of built-in water grooves deviate toward the end of the cutting sleeve with a smaller radius in sequence along the circumferential direction of the cutting sleeve.

2. A horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 1, characterized in that: Each group of built-in water grooves includes a first water groove, a second water groove and a third water groove in sequence along the circumferential direction of the cutting sleeve, wherein one end of the nozzle group on the first water groove is located at the starting end of the first water groove, and the other end is located at the rear middle area of ​​the first water groove; one end of the nozzle group on the second water groove is located at the front middle area of ​​the second water groove, and the other end is located at the rear middle area of ​​the second water groove, and is closer to the end of the built-in water groove than the other end of the nozzle group of the first water groove; one end of the nozzle group on the third water groove is located at the front middle area of ​​the third water groove, and is farther away from the starting end of the built-in water groove than one end of the nozzle group of the second water groove, and its other end is located at the end of the third water groove.

3. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 1, characterized in that: A plurality of water distribution pipes are arranged in the built-in water tank, and the plurality of water distribution pipes are respectively connected one by one with the plurality of nozzles in the nozzle group.

4. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 1, characterized in that: The cutting sleeve includes a front cylinder, a middle cylinder and a rear cylinder which are connected in sequence along the axial direction; wherein the front cylinder is a hemispherical surface, the diameter of the middle cylinder gradually increases, the diameter of the rear cylinder gradually decreases, and the minimum diameter of the rear cylinder is greater than the maximum diameter of the front cylinder.

5. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 4, characterized in that: The front cylinder, the middle cylinder and the rear cylinder are welded in sequence, and anti-shear pins are radially inserted at the welds.

6. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 1, characterized in that: The pick comprises a tooth seat, a retaining ring, and a pick-type pick. The bottom of the tooth seat is welded to the surface of the cutting sleeve by "J-type" groove welding, and the pick-type pick is installed on the tooth seat through the retaining ring; the tooth seat is a forged part of 20CrNiMo6 material.

7. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 1, characterized in that: The nozzle comprises a water spray seat and a nozzle. The water spray seat is welded on the surface of the cutting sleeve, and the nozzle is installed in the water spray seat and connected to the water outlet of the water distribution pipe.

8. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 7, characterized in that: The nozzle also includes a reinforcing rib, which is welded to the front side of the water spray seat along the rotation direction of the cutting head.

9. The horizontal axis cutting mechanism suitable for semi-coal-rock roadway according to claim 4, characterized in that: A circle of wear-resistant plates is uniformly welded at the small end of the root of the rear cylinder.

10. A tunnel boring machine, characterized in that: The tunnel boring machine comprises a transverse axis cutting mechanism suitable for semi-coal-rock tunnels as described in any one of claims 1-9.

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