Coal mine tunneling system and tunneling method

Abstract

The invention relates to the technical field of coal mining, in particular to a coal mine tunneling system which comprises a base, a crawler walking device is installed at the bottom of the base, a protection frame is fixedly installed at the top of the base, a tunneling mechanism is installed on the protection frame, and the tunneling mechanism comprises a supporting piece, a driving piece and a cutting assembly; the supporting piece is installed on the protection frame, the cutting assembly is installed on the top of the supporting piece, and the driving piece is installed on the inner side of the protection frame so as to drive the cutting assembly. After the auxiliary drill bit makes contact with the rock stratum, circumferential pressure is applied to the rock stratum, axial pressure can also be applied to the rock stratum, then the rock stratum can be rapidly crushed, the crushing efficiency of the rock stratum is further greatly improved, and the overall tunneling efficiency is further improved; meanwhile, the abrasion degree of the auxiliary drill bit can be reduced, and the service life of the auxiliary drill bit can be greatly prolonged.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to coal mine tunneling systems and methods. Background Technology

[0002] A tunneling machine is a comprehensive piece of equipment used for continuous operation, including mechanically breaking rocks, removing muck, and providing support. Based on the cutting process on the working face, it is divided into full-face tunneling machines and partial-face tunneling machines. It mainly consists of a traveling mechanism, a working mechanism, a loading mechanism, and a transfer mechanism. As the traveling mechanism advances, the cutting head in the working mechanism continuously breaks the rock and removes the debris.

[0003] Existing tunneling machines mainly cut rock strata by rotating one or more drill bits circumferentially. For example, Chinese Patent Publication No. CN108756877B discloses "a coal mine tunneling machine, including a base part, a drill bit part, a drill bit connecting part, and a conveyor belt part, characterized in that: two sliding blocks of the drill bit connecting part are respectively slidably installed in two first dovetail grooves; two first hydraulic cylinder top plates are respectively fixedly connected to the piston rod ends of four first hydraulic cylinders; the first parallel mechanism bottom plate of the drill bit part is fixedly installed on the outside of the third hydraulic cylinder top plate support plate; the bottom of the cylinder body of the eight fourth hydraulic cylinders of the conveyor belt part is fixedly installed on the support plate inside the concave plate".

[0004] This patent mainly uses a third stepper motor to drive the axial rotation of the drill bit to complete the coal mining work; however, the drill bit mainly relies on axial force to cut the rock layer during its circumferential movement, and cannot rotate to break the rock layer through axial action. This method is not effective in breaking the rock layer and cannot quickly and completely break the rock layer. This requires increasing the circumferential movement time of the drill bit to break the rock layer, which causes the drill bit to wear out severely during the process of breaking a section of rock layer, greatly reducing the service life of the drill bit. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies that cannot quickly and comprehensively break up rock strata, and to propose a coal mine tunneling system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The design includes a coal mine tunneling system, comprising a base, a tracked walking device mounted on the bottom of the base, a protective frame fixedly mounted on the top of the base, and a tunneling mechanism mounted on the protective frame. The tunneling mechanism includes a support component, a drive component, and a cutting component. The support component is mounted on the protective frame, the cutting component is mounted on the top of the support component, and the drive component is mounted on the inside of the protective frame to drive the cutting component.

[0008] Furthermore, the support component includes a hollow shaft, a mounting base, a rotating base, a connecting sleeve, a hydraulic cylinder, and a mounting plate; the hollow shaft passes through the protective frame and is rotatably connected to the protective frame; the mounting base is fixedly mounted on the top of the hollow shaft; both ends of the rotating base are rotatably connected to the inner wall of the mounting base via pins; one end of the connecting sleeve is fixedly connected to the rotating base; the other end of the connecting sleeve is fixedly connected to the mounting plate; the cutting assembly is mounted on the mounting plate; one end of the hydraulic cylinder is hinged to the outer side of the hollow shaft; and the other end of the hydraulic cylinder is hinged to the outer side of the connecting sleeve.

[0009] Furthermore, the support member also includes a first rotating shaft, a second rotating shaft, and a first universal coupling; the first rotating shaft passes through the hollow shaft and is rotatably connected to the hollow shaft, the second rotating shaft passes through the connecting sleeve rod and is rotatably connected to the connecting sleeve rod, and the first rotating shaft and the second rotating shaft are fixedly connected by the first universal coupling.

[0010] Furthermore, the cutting assembly includes a rotating sleeve, a housing, a main drill bit, an internal gear ring, and a drive gear; the rotating sleeve is rotatably mounted on the outside of the mounting plate, one end of the housing is fixedly mounted on the rotating sleeve, the main drill bit is fixedly mounted on the other end of the housing, the internal gear ring is fixedly mounted on the inside of the rotating sleeve, the second rotating shaft passes through the housing and is rotatably connected to the housing, and the drive gear is fixedly mounted on the end of the second rotating shaft and meshes with the internal gear ring.

[0011] Furthermore, a fixing plate is fixedly installed on the inner side of the outer shell, and an auxiliary drilling component is installed on the fixing plate. The auxiliary drilling component includes a third rotating shaft, a second universal coupling, and a plurality of first conical friction wheels. The third rotating shaft passes through the fixing plate and is rotatably connected to the fixing plate. One end of the third rotating shaft is fixedly connected to the second rotating shaft through the second universal coupling. The plurality of first conical friction wheels are all fixedly installed on the third rotating shaft and are equidistantly distributed along the axial direction of the third rotating shaft.

[0012] Furthermore, a plurality of second conical friction wheels are provided on the outer edges of a plurality of first conical friction wheels, and a fourth rotating shaft is fixedly installed on the outer side of a plurality of second conical friction wheels. The plurality of fourth rotating shafts penetrate the side wall of the outer casing and are rotatably connected to the outer casing. The plurality of second conical friction wheels are equidistantly distributed around the corresponding first conical friction wheels and are in contact with the corresponding first conical friction wheels. A secondary drill bit is fixedly installed on the end of a plurality of fourth rotating shafts away from the corresponding second conical friction wheel. The plurality of secondary drill bits are located on the outer side of the outer casing.

[0013] Furthermore, the driving component includes a first transmission gear, a first motor, a second transmission gear, and a second motor; the first transmission gear is fixedly installed at the bottom end of the hollow shaft, the first motor is fixedly installed inside the protective frame and its output shaft is fixedly connected to the second transmission gear, the second transmission gear meshes with the first transmission gear, and the second motor is fixedly installed inside the protective frame and its output shaft is fixedly connected to the first rotating shaft.

[0014] Furthermore, the lifting mechanism includes an internal threaded cylinder, a threaded rod, a top plate, a third motor, a third transmission gear, and a fourth transmission gear; the internal threaded cylinder passes through the base and is rotatably connected, the top end of the threaded rod is threadedly connected to the internal threaded cylinder, the bottom end of the threaded rod is fixedly connected to the top plate, the third motor is fixedly mounted on the top of the base, the third transmission gear is fixedly mounted on the output shaft of the third motor, and the fourth transmission gear is fixedly mounted on the top of the internal threaded cylinder and meshes with the third transmission gear.

[0015] Furthermore, the lifting mechanism also includes two guide rods and two limiting plates; both guide rods pass through the base and are slidably connected to the base, the bottom ends of the two guide rods are fixedly connected to both ends of the top plate, and the top ends of the two guide rods are fixedly connected to the two limiting plates.

[0016] The present invention also provides a tunneling method for a coal mine tunneling system, comprising the following steps;

[0017] S1: Start the first motor to drive the second transmission gear to rotate, thereby making the first transmission gear rotate synchronously. This causes the hollow shaft to rotate, and the rotation of the hollow shaft can make the mounting base rotate synchronously, thereby causing the rotating base to drive the connecting sleeve rod and the cutting assembly to rotate in the horizontal direction, and thus the cutting assembly can be adjusted to the corresponding angle.

[0018] S2: Controlling the hydraulic cylinder allows the connecting sleeve and rotating seat to rotate vertically relative to the mounting base, thereby adjusting the cutting assembly to the corresponding cutting angle;

[0019] S3: Start the second motor to drive the first shaft to rotate. The first shaft drives the second shaft to rotate synchronously. When the second shaft rotates, it drives the drive gear to rotate synchronously. This causes the internal gear ring to drive the rotating sleeve to rotate synchronously, which causes the main drill bit to rotate during contact with the rock layer, thereby causing the main drill bit to break the contact rock layer.

[0020] S4: When the second shaft rotates, it will drive the third shaft to rotate synchronously, which will cause all the first cone friction wheels on the third shaft to rotate synchronously. During the rotation of the first cone friction wheel, it will drive all the second cone friction wheels in contact with it to rotate synchronously, which will cause all the fourth shafts to rotate synchronously. This will cause all the auxiliary drill bits to rotate, and then cause the auxiliary drill bits to axially break the rock strata.

[0021] The coal mine tunneling system proposed in this invention has the following advantages:

[0022] 1. The rotation of the hollow shaft allows the mounting base to rotate synchronously, which in turn drives the connecting sleeve and cutting assembly to rotate horizontally. This allows adjustment of the horizontal position of the cutting assembly, thereby adjusting the tunneling direction without needing to adjust the travel direction of the traveling device, making operation more flexible. It also facilitates tunneling in confined spaces, thus meeting the needs of tunneling work in some roadways and having a wider range of applications.

[0023] 2. During the rotation of the first cone friction wheel, all the second cone friction wheels in contact with it will rotate synchronously, thereby causing all the fourth shafts to rotate synchronously. This causes all the auxiliary drill bits to rotate on their own axis, and all the auxiliary drill bits simultaneously rotate circumferentially with the outer casing. This allows the auxiliary drill bits to apply not only circumferential pressure but also axial pressure to the rock strata after contacting them, thus enabling rapid rock breaking. This further improves the rock breaking efficiency and overall tunneling efficiency. At the same time, it also reduces the wear of the auxiliary drill bits, which greatly extends their service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the coal mine tunneling system proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the tunneling mechanism of the coal mine tunneling system proposed in this invention;

[0026] Figure 3 This is a schematic diagram of the structure of the support component of the coal mine tunneling system proposed in this invention;

[0027] Figure 4 This is a schematic diagram of the cutting component of the coal mine tunneling system proposed in this invention;

[0028] Figure 5 This is a schematic diagram of the auxiliary drill element of the coal mine tunneling system proposed in this invention;

[0029] Figure 6 This is a schematic diagram of the drive component of the coal mine tunneling system proposed in this invention;

[0030] Figure 7 This is a schematic diagram of the lifting mechanism of the coal mine tunneling system proposed in this invention;

[0031] In the diagram: 1. Base; 2. Tracked walking device; 3. Protective frame; 4. Tunneling mechanism; 41. Support component; 411. Hollow shaft; 412. Mounting seat; 413. Rotating seat; 414. Connecting sleeve rod; 415. Hydraulic cylinder; 416. Mounting plate; 417. First rotating shaft; 418. Second rotating shaft; 419. First universal coupling; 42. Drive component; 421. First transmission gear; 422. First motor; 423. Second transmission gear; 424. Second motor; 424. Cutting assembly; 43. Rotating sleeve; 431. Housing. 432, main drill bit; 433, internal gear ring; 434, drive gear; 435, fixed plate; 436, auxiliary drill bit; 437, third rotating shaft; 4371, second universal coupling; 4372, first conical friction wheel; 4373, fourth rotating shaft; 4374, second conical friction wheel; 4375, auxiliary drill bit; 4376, lifting mechanism; 5, internal threaded cylinder; 51, threaded rod; 52, top plate; 53, third motor; 54, third transmission gear; 55, fourth transmission gear; 56, guide rod; 57, limit plate; 58. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Example 1:

[0034] Reference Figure 1-3 The coal mine tunneling system includes a base 1, with a tracked walking device 2 installed at the bottom of the base 1. The tracked walking device 2 is used to drive the entire system to move during tunneling. A protective frame 3 is fixedly installed on the top of the base 1. The protective frame 3 can protect the drive component 41 and prevent the rock broken by the cutting component 43 from falling and damaging the drive component 41. At the same time, the protective frame 3 can guide these rocks from both sides of the protective frame 3, which can prevent the tracked walking device 2 from accumulating too much rock on the protective frame 3 and thus consuming more power energy due to excessive load.

[0035] The protective frame 3 is equipped with a tunneling mechanism 4, which includes a support member 41, a drive member 42, and a cutting assembly 43. The support member 41 is installed on the protective frame 3, the cutting assembly 43 is installed on the top of the support member 41, and the drive member 42 is installed on the inside of the protective frame 3 to drive the cutting assembly 43. The cutting assembly 43 is used to break the rock strata, thereby ensuring that the whole structure can tunnel smoothly.

[0036] The support component 41 includes a hollow shaft 411, a mounting base 412, a rotating base 413, a connecting sleeve 414, a hydraulic cylinder 415, and a mounting plate 416. The hollow shaft 411 passes through the protective frame 3 and is rotatably connected to the protective frame 3. The mounting base 412 is fixedly installed on the top of the hollow shaft 411. Both ends of the rotating base 413 are rotatably connected to the inner wall of the mounting base 412 through pins. One end of the connecting sleeve 414 is fixedly connected to the rotating base 413, and the other end of the connecting sleeve 414 is fixedly connected to the mounting plate 416. The cutting assembly 43 is installed on the mounting plate 416. One end of the hydraulic cylinder 415 is hinged to the outside of the hollow shaft 411, and the other end of the hydraulic cylinder 415 is hinged to the outside of the connecting sleeve 414. The rotation of the hollow shaft 411 causes the mounting base 412 to rotate synchronously, which in turn causes the rotating base 413 to drive the connecting sleeve 414 and the cutting assembly 43 to rotate horizontally. This allows the horizontal position of the cutting assembly 43 to be adjusted, thereby adjusting the tunneling direction without having to adjust the travel direction of the traveling device 2, making the operation more flexible. It also facilitates tunneling in confined spaces, which can meet the needs of tunneling work in some roadways and has a wider range of applications.

[0037] By controlling the hydraulic cylinder 415, the connecting sleeve 414 and the rotating seat 413 can rotate vertically relative to the mounting seat 412, which can adjust the angle of the cutting component 43. This facilitates multi-angle cutting of the same rock stratum, enabling rapid rock stratum crushing and thus achieving rapid tunneling. This structure not only greatly improves the rock stratum crushing efficiency but also enhances the overall tunneling efficiency of the equipment.

[0038] Example 2:

[0039] Reference Figure 1-6 In another preferred embodiment of the present invention, the difference from embodiment 1 is that the support member 41 further includes a first rotating shaft 417, a second rotating shaft 418, and a first universal coupling 419; the first rotating shaft 417 passes through the hollow shaft 411 and is rotatably connected to the hollow shaft 411, the second rotating shaft 418 passes through the connecting sleeve 414 and is rotatably connected to the connecting sleeve 414, and the first rotating shaft 417 and the second rotating shaft 418 are fixedly connected by the first universal coupling 419; the rotation of the first rotating shaft 417 can cause the first universal coupling 419 to rotate synchronously, which in turn causes the second rotating shaft 418 to rotate synchronously, which can drive the cutting assembly 43 to rotate as a whole, thereby realizing the cutting work of the rock strata.

[0040] The cutting assembly 43 includes a rotating sleeve 431, a housing 432, a main drill bit 433, an internal gear ring 434, and a drive gear 435. The rotating sleeve 431 is rotatably mounted on the outside of the mounting plate 416. One end of the housing 432 is fixedly mounted on the rotating sleeve 431. The main drill bit 433 is fixedly mounted on the other end of the housing 432. The internal gear ring 434 is fixedly mounted on the inside of the rotating sleeve 431. A second rotating shaft 418 passes through the housing 432 and is rotatably connected to it. The drive gear 435 is fixedly mounted on the end of the second rotating shaft 418 and meshes with the internal gear ring 434. When the second rotating shaft 418 rotates, it can drive the drive gear 435 to rotate synchronously. Since the drive gear 435 meshes with the internal gear ring 434, the internal gear ring 434 will drive the rotating sleeve 431 to rotate synchronously. This causes the main drill bit 433 to rotate during contact with the rock strata, thereby causing the main drill bit 433 to break the contacting rock strata.

[0041] A fixing plate 436 is fixedly installed on the inner side of the outer casing 432. A secondary drilling component 437 is installed on the fixing plate 436. The secondary drilling component 437 includes a third rotating shaft 4371, a second universal coupling 4372, and a plurality of first conical friction wheels 4373. The third rotating shaft 4371 passes through the fixing plate 436 and is rotatably connected to the fixing plate 436. One end of the third rotating shaft 4371 is fixedly connected to the second rotating shaft 418 through the second universal coupling 4372. The plurality of first conical friction wheels 4373 are all fixedly installed on the third rotating shaft 4371 and are equidistantly distributed along the axial direction of the third rotating shaft 4371. When the second rotating shaft 418 rotates, it will drive the second universal coupling 4372 to rotate synchronously, which will cause the third rotating shaft 4371 to rotate synchronously, thereby causing all the first conical friction wheels 4373 on the third rotating shaft 4371 to rotate synchronously.

[0042] A plurality of second conical friction wheels 4375 are provided on the outer edge of a plurality of first conical friction wheels 4373. A fourth rotating shaft 4374 is fixedly installed on the outer side of each of the plurality of second conical friction wheels 4375. The plurality of fourth rotating shafts 4374 penetrate the side wall of the housing 432 and are rotatably connected to the housing 432. The plurality of second conical friction wheels 4375 are equidistantly distributed around the corresponding first conical friction wheels 4373 and are in contact with the corresponding first conical friction wheels 4373. A secondary drill bit 4376 is fixedly installed on the end of each of the plurality of fourth rotating shafts 4374 away from the corresponding second conical friction wheel 4375. The plurality of secondary drill bits 4376 are located on the outer side of the housing 432. During the rotation of the first cone friction wheel 4373, all the second cone friction wheels 4375 in contact with it will rotate synchronously, thereby causing all the fourth rotating shafts 4374 to rotate synchronously. This causes all the auxiliary drill bits 4376 to rotate on their own axis, and all the auxiliary drill bits 4376 simultaneously rotate circumferentially with the outer casing 432. As a result, after the auxiliary drill bits 4376 come into contact with the rock strata, they can not only apply circumferential pressure to the rock strata, but also apply axial pressure to the rock strata, thereby quickly breaking the rock strata. This further improves the rock breaking efficiency and thus further improves the overall tunneling efficiency. At the same time, it can also reduce the wear of the auxiliary drill bits 4376, which can greatly extend the service life of the auxiliary drill bits 4376.

[0043] The driving component 42 includes a first transmission gear 421, a first motor 422, a second transmission gear 423, and a second motor 424. The first transmission gear 421 is fixedly installed at the bottom end of the hollow shaft 411. The first motor 422 is fixedly installed inside the protective frame 3, and its output shaft is fixedly connected to the second transmission gear 423, which meshes with the first transmission gear 421. The second motor 424 is fixedly installed inside the protective frame 3, and its output shaft is fixedly connected to the first rotating shaft 417. The first motor 422 can drive the second transmission gear 423 to rotate, thereby causing the first transmission gear 421 to rotate synchronously. This causes the hollow shaft 411 to rotate, and the rotation of the hollow shaft 411 causes the mounting base 412 to rotate synchronously. This causes the rotating base 413 to drive the connecting sleeve rod 414 and the cutting assembly 43 to rotate in the horizontal direction, thus adjusting the horizontal position of the cutting assembly 43 and consequently adjusting the tunneling direction.

[0044] The second motor 422 drives the first rotating shaft 417 to rotate. The rotation of the first rotating shaft 417 causes the first universal coupling 419 to rotate synchronously, which in turn causes the second rotating shaft 418 to rotate synchronously. This, in turn, drives the cutting assembly 43 to rotate as a whole, thereby achieving the cutting of the rock strata. When the second rotating shaft 418 rotates, it drives the drive gear 435 to rotate synchronously. Since the drive gear 435 meshes with the internal gear ring 434, the internal gear ring 434 drives the rotating sleeve 431 to rotate synchronously. This causes the main drill bit 433 to rotate during contact with the rock strata, thereby causing the main drill bit 433 to break the contacting rock strata.

[0045] Working principle: First, the first motor 422 is started to drive the second transmission gear 423 to rotate, thereby causing the first transmission gear 421 to rotate synchronously. This causes the hollow shaft 411 to rotate. The rotation of the hollow shaft 411 causes the mounting base 412 to rotate synchronously, thereby causing the rotating base 413 to drive the connecting sleeve rod 414 and the cutting assembly 43 to rotate in the horizontal direction, thereby adjusting the cutting assembly 43 to the corresponding angle.

[0046] Then, controlling the hydraulic cylinder 415 can cause the connecting sleeve 414 and the rotating seat 413 to rotate in the vertical direction relative to the mounting seat 412, thereby adjusting the cutting angle of the cutting assembly 43 on the rock layer.

[0047] Finally, the second motor 422 is started to drive the first rotating shaft 417 to rotate. The rotation of the first rotating shaft 417 can cause the first universal coupling 419 to rotate synchronously, which in turn causes the second rotating shaft 418 to rotate synchronously, which can drive the cutting assembly 43 to rotate as a whole. When the second rotating shaft 418 rotates, it can drive the drive gear 435 to rotate synchronously. Since the drive gear 435 meshes with the internal gear ring 434, the internal gear ring 434 will drive the rotating sleeve 431 to rotate synchronously. This causes the main drill bit 433 to rotate during the contact with the rock layer, thereby causing the main drill bit 433 to break the contacting rock layer.

[0048] When the second shaft 418 rotates, it drives the second universal coupling 4372 to rotate synchronously, which in turn causes the third shaft 4371 to rotate synchronously. This causes all the first conical friction wheels 4373 on the third shaft 4371 to rotate synchronously. During the rotation of the first conical friction wheels 4373, all the second conical friction wheels 4375 in contact with them to rotate synchronously, which in turn causes all the fourth shafts 4374 to rotate synchronously. This causes all the auxiliary drill bits 4376 to rotate on their own axis. At the same time, all the auxiliary drill bits 4376 rotate circumferentially with the outer casing 432. This allows the auxiliary drill bits 4376 to apply not only circumferential pressure but also axial pressure to the rock strata after contacting them, thus enabling rapid crushing of the rock strata.

[0049] Example 3:

[0050] In Embodiment 1 or Embodiment 2, the entire equipment moves in the roadway of the coal mine by means of the tracked walking device 2. Since there are various terrains in the roadway, when the tracked walking device 2 travels on terrain that is high in the middle and low on both sides, in order to travel smoothly, the tracks at both ends of the tracked walking device 2 need to travel on the lower ground on both sides. The better bottom surface in the middle may come into contact with the base 1 and cause friction or obstruct the base 1, which makes the overall movement difficult.

[0051] Reference Figure 1-7 As another preferred embodiment of the present invention, the difference from Embodiment 1 or Embodiment 2 is that the lifting mechanism 5 includes an internal threaded cylinder 51, a threaded rod 52, a top plate 53, a third motor 54, a third transmission gear 55, a fourth transmission gear 56, two guide rods 57, and two limiting plates 58; the internal threaded cylinder 51 passes through the base 1 and is rotatably connected to it, the top end of the threaded rod 52 is threadedly connected to the internal threaded cylinder 51, and the bottom end of the threaded rod 52 is fixedly connected to the top plate 53, the third motor 54 is fixedly installed on the top of the base 1, the third transmission gear 55 is fixedly installed on the output shaft of the third motor 54, and the fourth transmission gear 56 is fixedly installed on the top of the internal threaded cylinder 51 and meshes with the third transmission gear 55; both guide rods 57 pass through the base 1 and are slidably connected to the base 1, the bottom ends of the two guide rods 57 are fixedly connected to both ends of the top plate 53 respectively, and the top ends of the two guide rods 57 are fixedly connected to the two limiting plates 58 respectively.

[0052] When the bottom of the base 1 contacts the ground, the third transmission gear 55 is rotated by activating the third electrode 54, which causes the fourth transmission gear 56 to rotate synchronously, thereby causing the internal threaded cylinder 51 to rotate synchronously. Under the constraint of the two guide rods 57, the threaded rod 52 and the internal threaded cylinder 51 rotate relative to each other, which allows the threaded rod 52 to translate downwards, thereby causing the top plate 53 to move downwards. When the top plate 53 contacts the ground, the threaded rod 52 continues to apply downward pressure to the top plate 53, while the ground applies a reaction force to the top plate 53. This causes the threaded rod 52 to apply a reaction force to the internal threaded cylinder 51, which in turn applies a reaction force to the base 1, causing the base 1 to lift upwards, thereby detaching the base 1 from the ground. This avoids the problem of the base 1 rubbing against the ground or being blocked by the ground and unable to move forward.

[0053] The present invention also provides a tunneling method for a coal mine tunneling system, comprising the following steps;

[0054] S1: Start the first motor 422 to drive the second transmission gear 423 to rotate, thereby causing the first transmission gear 421 to rotate synchronously. This causes the hollow shaft 411 to rotate. The rotation of the hollow shaft 411 can cause the mounting base 412 to rotate synchronously, thereby causing the rotating base 413 to drive the connecting sleeve rod 414 and the cutting assembly 43 to rotate in the horizontal direction, and thus the cutting assembly 43 can be adjusted to the corresponding angle.

[0055] S2: Controlling the hydraulic cylinder 415 can cause the connecting sleeve 414 and the rotating seat 413 to rotate in the vertical direction relative to the mounting seat 412, thereby adjusting the cutting assembly 43 to the corresponding cutting angle;

[0056] S3: Start the second motor 422 to drive the first rotating shaft 417 to rotate. The first rotating shaft 417 drives the second rotating shaft 418 to rotate synchronously. When the second rotating shaft 418 rotates, it will drive the drive gear 435 to rotate synchronously. This will cause the internal gear ring 434 to drive the rotating sleeve 431 to rotate synchronously. This will cause the main drill bit 433 to rotate during the contact with the rock layer, thereby causing the main drill bit 433 to break the contact rock layer.

[0057] S4: When the second rotating shaft 418 rotates, it will drive the third rotating shaft 4371 to rotate synchronously, thereby causing all the first cone friction wheels 4373 on the third rotating shaft 4371 to rotate synchronously. During the rotation of the first cone friction wheels 4373, all the second cone friction wheels 4375 in contact with them will rotate synchronously, thereby causing all the fourth rotating shafts 4374 to rotate synchronously. This causes all the auxiliary drill bits 4376 to rotate, thereby causing the auxiliary drill bits 4376 to axially break the rock strata.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal mine tunneling system, comprising a base (1), wherein a tracked walking device (2) is installed at the bottom of the base (1), characterized in that, A protective frame (3) is fixedly installed on the top of the base (1). A tunneling mechanism (4) is installed on the protective frame (3). The tunneling mechanism (4) includes a support member (41), a drive member (42), and a cutting assembly (43). The support member (41) is installed on the protective frame (3). The cutting assembly (43) is installed on the top of the support member (41). The drive member (42) is installed on the inner side of the protective frame (3) to drive the cutting assembly (43).

2. The coal mine tunneling system according to claim 1, characterized in that, The support member (41) includes a hollow shaft (411), a mounting base (412), a rotating base (413), a connecting sleeve (414), a hydraulic cylinder (415), and a mounting plate (416). The hollow shaft (411) passes through the protective frame (3) and is rotatably connected to the protective frame (3). The mounting base (412) is fixedly installed on the top of the hollow shaft (411). Both ends of the rotating base (413) are rotatably connected to the inner wall of the mounting base (412) through pins. One end of the connecting sleeve (414) is fixedly connected to the rotating base (413), and the other end of the connecting sleeve (414) is fixedly connected to the mounting plate (416). The cutting assembly (43) is installed on the mounting plate (416). One end of the hydraulic cylinder (415) is hinged to the outside of the hollow shaft (411), and the other end of the hydraulic cylinder (415) is hinged to the outside of the connecting sleeve (414).

3. The coal mine tunneling system according to claim 2, characterized in that, The support member (41) further includes a first rotating shaft (417), a second rotating shaft (418), and a first universal coupling (419); the first rotating shaft (417) passes through the hollow shaft (411) and is rotatably connected to the hollow shaft (411), the second rotating shaft (418) passes through the connecting sleeve (414) and is rotatably connected to the connecting sleeve (414), and the first rotating shaft (417) and the second rotating shaft (418) are fixedly connected by the first universal coupling (419).

4. The coal mine tunneling system according to claim 3, characterized in that, The cutting assembly (43) includes a rotating sleeve (431), a housing (432), a main drill bit (433), an internal gear ring (434), and a drive gear (435). The rotating sleeve (431) is rotatably mounted on the outside of the mounting plate (416). One end of the housing (432) is fixedly mounted on the rotating sleeve (431). The main drill bit (433) is fixedly mounted on the other end of the housing (432). The internal gear ring (434) is fixedly mounted on the inside of the rotating sleeve (431). The second rotating shaft (418) passes through the housing (432) and is rotatably connected to the housing (432). The drive gear (435) is fixedly mounted on the end of the second rotating shaft (418) and meshes with the internal gear ring (434).

5. The coal mine tunneling system according to claim 4, characterized in that, A fixing plate (436) is fixedly installed on the inner side of the outer shell (432). A secondary drill (437) is installed on the fixing plate (436). The secondary drill (437) includes a third rotating shaft (4371), a second universal coupling (4372), and a plurality of first conical friction wheels (4373). The third rotating shaft (4371) passes through the fixing plate (436) and is rotatably connected to the fixing plate (436). One end of the third rotating shaft (4371) is fixedly connected to the second rotating shaft (418) through the second universal coupling (4372). A plurality of first conical friction wheels (4373) are all fixedly installed on the third rotating shaft (4371) and are equidistantly distributed along the axial direction of the third rotating shaft (4371).

6. The coal mine tunneling system according to claim 5, characterized in that, A plurality of second conical friction wheels (4375) are provided on the outer edges of a plurality of first conical friction wheels (4373). A fourth rotating shaft (4374) is fixedly installed on the outer side of a plurality of second conical friction wheels (4375). A plurality of fourth rotating shafts (4374) penetrate the side wall of the outer shell (432) and are rotatably connected to the outer shell (432). A plurality of second conical friction wheels (4375) are equidistantly distributed around the corresponding first conical friction wheels (4373) and are in contact with the corresponding first conical friction wheels (4373). A secondary drill bit (4376) is fixedly installed on the end of a plurality of fourth rotating shafts (4374) away from the corresponding second conical friction wheel (4375). A plurality of secondary drill bits (4376) are located on the outer side of the outer shell (432).

7. The coal mine tunneling system according to claim 5, characterized in that, The drive unit (42) includes a first transmission gear (421), a first motor (422), a second transmission gear (423), and a second motor (424); the first transmission gear (421) is fixedly installed at the bottom end of the hollow shaft (411), the first motor (422) is fixedly installed on the inner side of the protective frame (3) and its output shaft is fixedly connected to the second transmission gear (423), the second transmission gear (423) meshes with the first transmission gear (421), and the second motor (424) is fixedly installed on the inner side of the protective frame (3) and its output shaft is fixedly connected to the first rotating shaft (417).

8. The coal mine tunneling system according to claim 7, characterized in that, The lifting mechanism (5) includes an internal threaded cylinder (51), a threaded rod (52), a top plate (53), a third motor (54), a third transmission gear (55), and a fourth transmission gear (56). The internal threaded cylinder (51) passes through the base (1) and is rotatably connected. The top end of the threaded rod (52) is threadedly connected to the internal threaded cylinder (51), and the bottom end of the threaded rod (52) is fixedly connected to the top plate (53). The third motor (54) is fixedly installed on the top of the base (1). The third transmission gear (55) is fixedly installed on the output shaft of the third motor (54). The fourth transmission gear (56) is fixedly installed on the top of the internal threaded cylinder (51) and meshes with the third transmission gear (55).

9. The coal mine tunneling system according to claim 8, characterized in that, The lifting mechanism (5) also includes two guide rods (57) and two limiting plates (58); the two guide rods (57) pass through the base (1) and are slidably connected to the base (1); the bottom ends of the two guide rods (57) are fixedly connected to the two ends of the top plate (53) respectively; and the top ends of the two guide rods (57) are fixedly connected to the two limiting plates (58) respectively.

10. A tunneling method for a coal mine tunneling system according to claim 9, characterized in that, Includes the following steps; S1: Start the first motor (422) to drive the second transmission gear (423) to rotate, thereby causing the first transmission gear (421) to rotate synchronously, which causes the hollow shaft (411) to rotate. The rotation of the hollow shaft (411) can cause the mounting base (412) to rotate synchronously, thereby causing the rotating base (413) to drive the connecting sleeve rod (414) and the cutting assembly (43) to rotate in the horizontal direction, thereby adjusting the cutting assembly (43) to the corresponding angle; S2: Controlling the hydraulic cylinder (415) can cause the connecting sleeve (414) and the rotating seat (413) to rotate in the vertical direction relative to the mounting seat (412), thereby adjusting the cutting assembly (43) to the corresponding cutting angle; S3: Start the second motor (422) to drive the first rotating shaft (417) to rotate. The first rotating shaft (417) drives the second rotating shaft (418) to rotate synchronously. When the second rotating shaft (418) rotates, it will drive the drive gear (435) to rotate synchronously. This will cause the internal gear ring (434) to drive the rotating sleeve (431) to rotate synchronously. This will cause the main drill bit (433) to rotate during the contact with the rock layer, thereby causing the main drill bit (433) to break the contact rock layer. S4: When the second shaft (418) rotates, it will drive the third shaft (4371) to rotate synchronously, thereby causing all the first cone friction wheels (4373) on the third shaft (4371) to rotate synchronously. During the rotation of the first cone friction wheel (4373), it will drive all the second cone friction wheels (4375) in contact with it to rotate synchronously, thereby causing all the fourth shafts (4374) to rotate synchronously. This causes all the auxiliary drill bits (4376) to rotate, thereby causing the auxiliary drill bits (4376) to axially break the rock strata.

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