Anchor net supporting mechanism of underground coal mine shield tunneling machine

Abstract

The invention provides an anchor net supporting mechanism of a coal mine underground shield tunneling machine, and relates to the technical field of coal mine supporting. The supporting assembly is connected with the anchor rod; the reinforcing connecting mechanism is installed on the surface of the supporting assembly and connected with the anchor rod. One end of the top of the elastic pressurization supporting mechanism is connected with the supporting assembly; the sliding display assembly is installed on the surface of the supporting assembly and connected with the elastic pressurization supporting mechanism. According to the device, the installation number of anchor rods can be reduced, and positioning and inserting are convenient and simple; when the hole wall goes wrong, the alarm lamp is automatically turned on to give an alarm; the problems that it is troublesome to insert, fix and assemble anchor rods, a large amount of time and manpower are wasted due to the fact that the number of the anchor rods is too large, and if the interior of an ore mountain or a hole wall goes wrong, an alarm mechanism is lacked for warning are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine support, and particularly relates to an anchor net support mechanism for a shield machine underground in a coal mine. Background Art

[0002] Coal mining, as the core link of coal mine exploitation, is used to separate coal from underground or surface ore deposits and transport it away from the site; however, in recent years, the problem of coal mining succession has been restricting the production of coal mines; to solve this problem, introducing shield machine technology can significantly improve the efficiency of underground tunneling; after the shield machine mines, to ensure the stability and safety of roadways and working faces, anchor net support is usually used for auxiliary reinforcement; this process requires inserting a large number of anchor bolts into the inner wall of the tunnel to form a support structure, and then further protecting it with a protective net; however, the installation and fixation of anchor bolts and subsequent assembly work are quite cumbersome, and a large amount of time and manpower will be wasted when the quantity is excessive. In addition, when problems occur inside the ore mountain or the tunnel wall, relying solely on the protective net for support may not be intuitive enough for workers to detect potential hidden dangers in advance; the lack of an effective alarm mechanism for warning undoubtedly increases the danger of the operation. Summary of the Invention

[0003] An embodiment of the present disclosure relates to an anchor net support mechanism for a shield machine underground in a coal mine, which has a support assembly and an elastic pressure support mechanism. The support assembly is firmly connected to the anchor bolts to provide support for the protective net. The elastic pressure support mechanism can elastically extrude and provide auxiliary support for the protective net, reducing the number of anchor bolts installed and improving the support installation speed and efficiency; a reinforcement connection mechanism and a fixing plate are convenient and simple for positioning and insertion, and can complete the fixation of three groups of anchor bolts at one time, accelerating the fixation speed and efficiency; a display assembly and an alarm mechanism, the elastic pressure support mechanism is in elastic contact with the tunnel wall. When problems occur in the tunnel wall, the support plate and the sliding plate in the device will move accordingly and automatically turn on the alarm light to give a warning, reducing the danger.

[0004] In a first aspect of the present disclosure, an anchor net support mechanism for a shield machine underground in a coal mine is provided, which specifically includes: a support assembly, anchor bolts, a reinforcement connection mechanism, an elastic pressure support mechanism, a sliding display assembly, and an alarm mechanism;

[0005] The overall bolt is a round rod structure, and a threaded hole is provided at the top of the bolt; the support assembly is connected to the bolt; the reinforcement connection mechanism is installed on the surface of the support assembly and connected to the bolt; one end of the top of the elastic pressure support mechanism is connected to the support assembly; the sliding display assembly is installed on the surface of the support assembly and connected to the elastic pressure support mechanism; the alarm mechanism is installed inside the sliding display assembly; the alarm mechanism includes: a main control rod B, a bevel gear assembly, and a threaded rod B; one end of the main control rod B is connected to the bevel gear assembly; the threaded rod B is connected to the other end of the bevel gear assembly, and the main control rod B can be rotationally connected to the threaded rod B through the bevel gear assembly.

[0006] In at least some embodiments, the support assembly includes: a main support rod, a top box, and a fixing plate; the main support rod is a U-shaped structure as a whole; the top box is a cross-shaped structure with a hollow interior, and the bottom of the top box is fixedly connected to the main support rod; the fixing plate is a cuboid structure with a circular hole in the middle, and one side of the fixing plate is fixedly connected to the main support rod.

[0007] In at least some embodiments, the reinforcement connection mechanism includes: a threaded rod A, a driving chain A, a main control rod A, a driving chain B, an auxiliary rotating block, and a driving rod; the number of the threaded rods A is set to two groups, gears are arranged on the surfaces of the threaded rods A, the tops of the threaded rods A pass through the circular holes of the fixing plate and are rotationally connected to the main support rod; the driving chain A is meshed and connected with the gears on the surfaces of the threaded rods A; gears are arranged on the surface of the main control rod A, and the main control rod A is rotatably inserted into the top box; the inner side of the driving chain B is meshed and connected with the gears on the surface of the main control rod A; the auxiliary rotating block is a cylindrical structure with a hexagonal groove at the top, and the auxiliary rotating block is fixedly installed on the top of the threaded rod A, and the auxiliary rotating block can conveniently control the rotation of the main control rod A; two groups of gears are fixedly arranged on the surface of the driving rod, the driving rod is rotatably inserted into the top box, one group of gears at the top of the driving rod is rotationally connected to the two threaded rods A through the driving chain A, and one group of gears at the bottom of the driving rod is rotationally connected to the main control rod A through the driving chain B.

[0008] In at least some embodiments, the elastic pressure support mechanism includes: a fixed column, a sliding block A, a bottom plate, a spring A, and a sliding insertion rod; the fixed column is a cylindrical structure with a hexagonal chute inside, and the top of the fixed column is fixedly connected to the main support rod; the sliding block A is a hexagonal structure, and the sliding block A is slidably installed inside the chute of the fixed column; the top of the bottom plate is slidably inserted into the fixed column and fixedly connected to the sliding block A; the spring A is installed inside the fixed column and connected to the sliding block A, and the spring A can elastically squeeze the bottom plate and the protective net against the mine wall; the sliding insertion rod slidably passes through the top box, the main support rod and is inserted into the fixed column, and the sliding insertion rod is fixedly connected to the sliding block A.

[0009] In at least some embodiments, the sliding display component includes: a transparent pillar, a support plate, a connecting rod, a sliding plate B, and a top plate; the transparent pillar is a hollow cylindrical structure, the transparent pillar is fixedly installed on the top of the top box, the transparent pillar is fixedly installed on the surface of the top box, and the top of the sliding insertion rod slides into the inside of the transparent pillar; the support plate is slidably installed inside the transparent pillar and is fixedly connected to the sliding insertion rod; the bottom of the connecting rod is fixedly connected to the support plate; the sliding plate B is a circular structure with a square groove in the middle, and the sliding plate B is fixedly connected to the connecting rod; the top plate is fixedly installed on the top of the transparent pillar, one end of the main control rod B rotates and inserts into the inside of the top plate, and the top of the threaded rotating rod B is rotatably connected to the top plate.

[0010] In at least some embodiments, the alarm mechanism further includes: a lifting slide rod, an alarm lamp, and a contact alarm component; the lifting slide rod is a cuboid structure, the lifting slide rod slides into the middle of the support plate and the connecting rod, the top of the lifting slide rod is threadedly connected to the threaded rotating rod B, and the rotation of the threaded rotating rod B can control the lifting and sliding of the lifting slide rod; the alarm lamp is fixedly installed on the top of the top plate; the contact alarm component is fixedly installed at the bottom of the lifting slide rod.

[0011] In at least some embodiments, the contact alarm component includes: an inner column, a sliding contact rod, a support column, a pull rope, a limiting support rod, a lifting plate, a spring B, a push switch, and a spring C; the inner column is a hollow cylindrical structure, and the inner column is fixedly connected to the lifting slide rod; the bottom of the sliding contact rod slides through the inner column, and the sliding contact rod can play a role in assisting in triggering the alarm lamp; the support column is a hollow cylindrical structure, and the upper and lower ends of the support column are fixedly connected to the two groups of cylinders and the inner column; one end of the pull rope slides into the inside of the inner column, and the other side of the pull rope is fixedly connected to the sliding contact rod; the top end of the limiting support rod is slidably connected to the square plate inside the support column, and the limiting support rod can play an auxiliary limiting role for the lifting plate; the surface of the lifting plate is fixedly connected to the limiting support rod; the bottom of the spring B contacts the lifting plate; one end of the push switch is fixedly connected to the square plate inside the support column, and the push switch is electrically connected to the alarm lamp; the number of the spring C is set to two groups, and the spring C is installed on the surface of the sliding contact rod, and the spring C can play an elastic supporting role for the sliding contact rod.

[0012] The present invention has the following beneficial effects

[0013] First of all, the inside of the present invention is provided with a support component and an elastic pressure support mechanism. The support component is an overall U-shaped structure. Multiple groups of elastic pressure support mechanisms are arranged inside the support component. The support component is firmly connected to the anchor bolt to provide support for the protective net. The elastic pressure support mechanism can elastically squeeze and play an auxiliary support effect on the protective net, and can play a good support role for some uneven hole walls. The setting of the elastic pressure support mechanism can reduce the installation quantity of the anchor bolts and improve the installation speed and efficiency of the support.

[0014] Secondly, a reinforcement connection mechanism and a fixing plate are also arranged inside the device. The anchor rod is inserted into the round hole of the fixing plate, which can provide auxiliary positioning for the whole device, facilitating its insertion into the threaded hole of the anchor rod. The three screw rods are quickly and accurately inserted into the threaded holes. Controlled, the three screw rods will rotate simultaneously, and the fixing of the three anchor rods can be completed at one time, accelerating the fixing speed and efficiency and improving the installation efficiency.

[0015] Finally, a display component and an alarm mechanism are also arranged inside the present invention. The elastic pressure support mechanism is in elastic contact with the hole wall. When there is a problem with the hole wall, the support plate and the sliding plate inside the elastic pressure support mechanism will move accordingly. The support plate and the sliding plate will contact the sliding contact rod, and the sliding contact rod will also move in the opposite direction under extrusion. Then, the lifting plate is controlled to slide through the pull rope and press the push switch, automatically turning on the alarm light to give a warning and reduce the danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The following drawings only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings:

[0019] Figure 1 A schematic structural diagram of the main body of the present invention is shown in a side view;

[0020] Figure 2 A schematic structural diagram of the main body of the present invention is shown in a sectional view;

[0021] Figure 3 A schematic structural diagram of the support component of the present invention is shown in an exploded view;

[0022] Figure 4 A schematic structural diagram of the reinforcement connection mechanism of the present invention is shown in a side view;

[0023] Figure 5 A schematic structural diagram of the elastic pressure support mechanism of the present invention is shown in a sectional view;

[0024] Figure 6 A schematic structural diagram of the sliding display component of the present invention is shown in a sectional view;

[0025] Figure 7 A schematic structural diagram of the alarm mechanism of the present invention is shown in a sectional view;

[0026] Figure 8 A schematic structural diagram of the contact alarm component of the present invention is shown in a sectional view.

[0027] LIST OF REFERENCE NUMERALS

[0028] 1. Support assembly; 101. Main support rod; 102. Top box; 103. Fixed plate; 2. Anchor bolt; 3. Reinforcement connection mechanism; 301. Threaded rotating rod A; 302. Driving chain A; 303. Main control rod A; 304. Driving chain B; 305. Auxiliary rotating block; 306. Driving rod; 4. Elastic pressure support mechanism; 401. Fixed column; 402. Sliding block A; 403. Bottom plate; 404. Spring A; 405. Sliding insertion rod; 5. Sliding display assembly; 501. Transparent support column; 502. Support plate; 503. Connecting rod; 504. Sliding plate B; 505. Top plate; 6. Alarm mechanism; 601. Main control rod B; 602. Bevel gear assembly; 603. Threaded rotating rod B; 604. Lifting slide rod; 605. Alarm lamp; 606. Contact alarm assembly; 6061. Inner column; 6062. Sliding contact rod; 6063. Support column; 6064. Pulling rope; 6065. Limit support rod; 6066. Lifting plate; 6067. Spring B; 6068. Pressing switch; 6069. Spring C. Specific implementation mode

[0029] The following further describes the implementation mode of the present invention in detail with reference to the drawings and embodiments.

[0030] Embodiment: Please refer to Figures 1 to 8 :

[0031] The present invention provides an anchor net support mechanism for a shield machine in coal mines, including: a support assembly 1, an anchor bolt 2, a reinforcement connection mechanism 3, an elastic pressure support mechanism 4, a sliding display assembly 5 and an alarm mechanism 6;

[0032] The anchor bolt 2 is of an overall round rod structure, and a threaded hole is provided at the top of the anchor bolt 2; the support assembly 1 is connected to the anchor bolt 2; the reinforcement connection mechanism 3 is installed on the surface of the support assembly 1 and connected to the anchor bolt 2; one end of the top of the elastic pressure support mechanism 4 is connected to the support assembly 1; the sliding display assembly 5 is installed on the surface of the support assembly 1 and connected to the elastic pressure support mechanism 4; the alarm mechanism 6 is installed inside the sliding display assembly 5; the alarm mechanism 6 includes: a main control rod B601, a bevel gear assembly 602 and a threaded rotating rod B603; one end of the main control rod B601 is connected to the bevel gear assembly 602; the threaded rotating rod B603 is connected to the other end of the bevel gear assembly 602, and the main control rod B601 can be rotationally connected to the threaded rotating rod B603 through the bevel gear assembly 602.

[0033] Such as Figure 3As shown in the figure, the support assembly 1 includes: a main support rod 101, a top box 102, and a fixing plate 103; the main support rod 101 is in a U-shaped structure as a whole; the top box 102 is in a cross-shaped structure with a hollow interior, and the bottom of the top box 102 is fixedly connected to the main support rod 101; the fixing plate 103 is in a cuboid structure with a circular hole in the middle, and one side of the fixing plate 103 is fixedly connected to the main support rod 101.

[0034] As Figure 4 shown in the figure, the reinforcement connection mechanism 3 includes: a threaded rotating rod A301, a driving chain A302, a main control rod A303, a driving chain B304, an auxiliary rotating block 305, and a driving rod 306; the number of the threaded rotating rods A301 is set to two groups, gears are arranged on the surface of the threaded rotating rod A301, the top of the threaded rotating rod A301 passes through the circular hole of the fixing plate 103 and is rotatably connected to the main support rod 101; the driving chain A302 is meshed and connected with the gear on the surface of the threaded rotating rod A301; gears are arranged on the surface of the main control rod A303, the main control rod A303 is rotatably inserted into the interior of the top box 102, and threads are provided on the lower surface of the main control rod A303; the inner side of the driving chain B304 is meshed and connected with the gear on the surface of the main control rod A303; the auxiliary rotating block 305 is in a cylindrical structure with a hexagonal groove on the top, the auxiliary rotating block 305 is fixedly installed on the top of the threaded rotating rod A301, and the auxiliary rotating block 305 can conveniently control the rotation of the main control rod A303; two groups of gears are fixedly arranged on the surface of the driving rod 306, the driving rod 306 is rotatably inserted into the interior of the top box 102, one group of gears at the top of the driving rod 306 is rotatably connected to the two threaded rotating rods A301 through the driving chain A302, and one group of gears at the bottom of the driving rod 306 is rotatably connected to the main control rod A303 through the driving chain B304.

[0035] As Figure 5 shown in the figure, the elastic pressure support mechanism 4 includes: a fixed column 401, a sliding block A402, a bottom plate 403, a spring A404, and a sliding insertion rod 405; the fixed column 401 is in a cylindrical structure with a hexagonal chute inside, and the top of the fixed column 401 is fixedly connected to the main support rod 101; the sliding block A402 is in a hexagonal structure, and the sliding block A402 is slidably installed inside the chute of the fixed column 401; the top of the bottom plate 403 is slidably inserted into the fixed column 401 and is fixedly connected to the sliding block A402; the spring A404 is installed inside the fixed column 401 and is connected to the sliding block A402, and the spring A404 can elastically press the bottom plate 403 and the protective net against the mine wall; the sliding insertion rod 405 slidably passes through the top box 102, the main support rod 101 and is inserted into the fixed column 401, and the sliding insertion rod 405 is fixedly connected to the sliding block A402.

[0036] As Figure 6As shown in the figure, the sliding display component 5 includes: a transparent support column 501, a support plate 502, a connecting rod 503, a sliding plate B 504, and a top plate 505; the transparent support column 501 is a cylindrical structure with a hollow interior, the transparent support column 501 is fixedly installed on the top of the top box 102, the transparent support column 501 is fixedly installed on the surface of the top box 102, and the top of the sliding insertion rod 405 is slidably inserted into the interior of the transparent support column 501; the support plate 502 is slidably installed inside the transparent support column 501 and is fixedly connected to the sliding insertion rod 405; the bottom of the connecting rod 503 is fixedly connected to the support plate 502; the sliding plate B 504 is a circular structure with a square groove in the middle, and the sliding plate B 504 is fixedly connected to the connecting rod 503; the top plate 505 is fixedly installed on the top of the transparent support column 501, and one end of the main control rod B 601 is rotatably inserted into the interior of the top plate 505, and the top of the threaded rotating rod B 603 is rotatably connected to the top plate 505.

[0037] As Figure 7 shown in the figure, the alarm mechanism 6 further includes: a lifting slide rod 604, an alarm lamp 605, and a contact alarm component 606; the lifting slide rod 604 is a cuboid structure, the lifting slide rod 604 is slidably inserted between the support plate 502 and the connecting rod 503, the top of the lifting slide rod 604 is threadedly connected to the threaded rotating rod B 603, and the rotation of the threaded rotating rod B 603 can control the lifting and sliding of the lifting slide rod 604; the alarm lamp 605 is fixedly installed on the top of the top plate 505; the contact alarm component 606 is fixedly installed at the bottom of the lifting slide rod 604.

[0038] As Figure 8As shown, the contact alarm component 606 includes: an inner column 6061, a sliding contact rod 6062, a support column 6063, a pull rope 6064, a limit support rod 6065, a lifting plate 6066, a spring B 6067, a push switch 6068, and a spring C 6069; the inner column 6061 is a hollow cylindrical structure, and the inner column 6061 is fixedly connected to the lifting slide rod 604; the bottom of the sliding contact rod 6062 slides through the inner column 6061, and the sliding contact rod 6062 can assist in triggering the alarm lamp 605; the support column 6063 is a hollow cylindrical structure, and the upper and lower ends of the support column 6063 are fixedly connected to two groups of cylinders and the inner column 6061; one end of the pull rope 6064 slides into the inner column 6061, and the other side of the pull rope 6064 is fixedly connected to the sliding contact rod 6062; the top end of the limit support rod 6065 is slidably connected to the square plate inside the support column 6063, and the limit support rod 6065 can assist in limiting the lifting plate 6066; the surface of the lifting plate 6066 is fixedly connected to the limit support rod 6065; the bottom of the spring B 6067 contacts the lifting plate 6066; one fixed end of the push switch 6068 is fixedly connected to the square plate inside the support column 6063, and the push switch 6068 is electrically connected to the alarm lamp 605; the number of the springs C 6069 is set to two groups, and the springs C 6069 are installed on the surface of the sliding contact rod 6062, and the springs C 6069 can elastically support the sliding contact rod 6062.

[0039] Specific usage method and function of this embodiment: When the present invention is installed and used, multiple groups of anchor rods 2 are inserted into the inner wall of the cave according to the positioning. Then, the protective net is laid on the surface of the ice wall, and the fixing plate 103 is assembled with the anchor rod 2. The anchor rod 2 is inserted into the round hole of the fixing plate 103 to complete the positioning. At this time, the two threaded rotating rods A301 and the main control rod A303 are inserted into the corresponding threaded holes of the anchor rod 2. By controlling the rotation of the main control rod A303 by a machine, the main control rod A303 drives the driving rod 306 to rotate through the driving chain B304. The driving rod 306 rotates and controls the two threaded rotating rods A301 to rotate simultaneously again through the driving chain A302. Under the linkage control of the driving chain A302 and the driving chain B304, the two threaded rotating rods A301 and the main control rod A303 rotate in the same direction, rotate and insert into the anchor rod 2 to complete the auxiliary fastening support. The fixing plate 103 slides and contacts the protective net to form an auxiliary support and fixation. The bottom plate 403 slides and contacts the protective net to form an auxiliary support. When the bottom plate 403 is in close contact with the protective net, the sliding plug rod 405 will push the support plate 502, the connecting rod 503 and the sliding plate B504 to move to corresponding positions. At this time, the threaded rotating rod B603 can be controlled to rotate by the main control rod B601 and the bevel gear assembly 602. The threads on the surface of the threaded rotating rod B603 can control the lifting and sliding of the lifting slide rod 604 and the contact alarm assembly 606 during rotation, and control the contact alarm assembly 606 to move to the middle area between the support plate 502 and the sliding plate B504. When there is a problem with the cave wall, the bottom plate 403 closely attached to the cave wall will change its position accordingly, and the contact alarm assembly 606 will move. The sliding contact rod 6062 contacts the support plate 502 or the sliding plate B504, and the sliding contact rod 6062 will slide in the opposite direction. When the sliding contact rod 6062 slides, the spring C6069 deforms, and the sliding contact rod 6062 drags the lifting plate 6066 to slide upward through the pull rope 6064. The lifting plate 6066 contacts and squeezes the pressing switch 6068, and the alarm lamp 605 lights up to play a reminder effect.

[0040] In this article, the following points need to be noted:

[0041] 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0042] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0043] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An anchor net support mechanism for a shield machine underground in a coal mine, comprising: Support component (1), anchor bolt (2), reinforcement connection mechanism (3), elastic pressure support mechanism (4), sliding display component (5) and alarm mechanism (6); The anchor bolt (2) is an overall round rod-shaped structure, and a threaded hole is provided at the top of the anchor bolt (2); characterized in that the support component (1) is connected to the anchor bolt (2); the reinforcement connection mechanism (3) is installed on the surface of the support component (1) and is connected to the anchor bolt (2); one end of the top of the elastic pressure support mechanism (4) is connected to the support component (1); the sliding display component (5) is installed on the surface of the support component (1) and is connected to the elastic pressure support mechanism (4); the alarm mechanism (6) is installed inside the sliding display component (5); the alarm mechanism (6) includes: main control rod B (601), bevel gear assembly (602) and threaded rotating rod B (603); one end of the main control rod B (601) is connected to the bevel gear assembly (602); the threaded rotating rod B (603) is connected to the other end of the bevel gear assembly (602), and the main control rod B (601) can be rotationally connected to the threaded rotating rod B (603) through the bevel gear assembly (602).

2. The bolt-mesh support mechanism of a shield machine for underground coal mines according to claim 1, characterized in that: The support component (1) includes: main support rod (101), top box (102) and fixed plate (103); the main support rod (101) is an overall U-shaped structure; the bottom of the top box (102) is fixedly connected to the main support rod (101); one side of the fixed plate (103) is fixedly connected to the main support rod (101).

3. The anchor net support mechanism of a shield machine for coal mines according to claim 2, characterized in that: The reinforcement connection mechanism (3) includes: threaded rotating rod A (301), driving chain A (302), main control rod A (303), driving chain B (304), auxiliary rotating block (305) and driving rod (306); gears are provided on the surface of the threaded rotating rod A (301), and the top of the threaded rotating rod A (301) passes through the round hole of the fixed plate (103) and is rotationally connected to the main support rod (101); the driving chain A (302) is meshed and connected to the gear on the surface of the threaded rotating rod A (301); gears are provided on the surface of the main control rod A (303), the main control rod A (303) rotates and is inserted into the top box (102) internally, and threads are provided on the lower surface of the main control rod A (303); the inner side of the driving chain B (304) is meshed and connected to the gear on the surface of the main control rod A (303); the auxiliary rotating block (305) is fixedly installed on the top of the threaded rotating rod A (301); two groups of gears are fixedly provided on the surface of the driving rod (306), the driving rod (306) rotates and is inserted into the top box (102) internally, one group of gears at the top of the driving rod (306) is rotationally connected to two threaded rotating rods A (301) through the driving chain A (302), and one group of gears at the bottom of the driving rod (306) is rotationally connected to the main control rod A (303) through the driving chain B (304).

4. The anchor net support mechanism of a shield machine for underground coal mines according to claim 2, characterized in that: The elastic pressure support mechanism (4) includes: a fixed column (401), a sliding block A (402), a bottom plate (403), a spring A (404), and a sliding insertion rod (405); the top of the fixed column (401) is fixedly connected to the main support rod (101); the sliding block A (402) is slidably installed inside the chute of the fixed column (401); the top of the bottom plate (403) is slidably inserted into the fixed column (401) and fixedly connected to the sliding block A (402); the spring A (404) is installed inside the fixed column (401) and connected to the sliding block A (402); the sliding insertion rod (405) slidably passes through the top box (102), the main support rod (101) and is inserted into the fixed column (401), and the sliding insertion rod (405) is fixedly connected to the sliding block A (402).

5. The bolting support mechanism of a shield tunneling machine in a coal mine according to claim 4, characterized in that: The sliding display assembly (5) includes: a transparent support column (501), a support plate (502), a connecting rod (503), a sliding plate B (504), and a top plate (505); the transparent support column (501) is fixedly installed on the top of the top box (102), the transparent support column (501) is fixedly installed on the surface of the top box (102), and the top of the sliding insertion rod (405) is slidably inserted into the transparent support column (501); the support plate (502) is slidably installed inside the transparent support column (501) and fixedly connected to the sliding insertion rod (405); the bottom of the connecting rod (503) is fixedly connected to the support plate (502); the sliding plate B (504) is fixedly connected to the connecting rod (503); the top plate (505) is fixedly installed on the top of the transparent support column (501), one end of the main control rod B (601) is rotatably inserted into the top plate (505), and the top of the threaded rotating rod B (603) is rotatably connected to the top plate (505).

6. The bolting support mechanism of a shield machine for underground coal mines according to claim 5, characterized in that: The alarm mechanism (6) further includes: a lifting slide rod (604), an alarm lamp (605), and a contact alarm assembly (606); the lifting slide rod (604) is of a cuboid structure, the lifting slide rod (604) is slidably inserted between the support plate (502) and the connecting rod (503), and the top of the lifting slide rod (604) is threadedly connected to the threaded rotating rod B (603); the alarm lamp (605) is fixedly installed on the top of the top plate (505); the contact alarm assembly (606) is fixedly installed at the bottom of the lifting slide rod (604).

7. The anchor net support mechanism of a shield machine in a coal mine according to claim 6, characterized in that: The contact alarm component (606) includes: an inner column (6061), a sliding contact rod (6062), a support column (6063), a pull rope (6064), a limit support rod (6065), a lifting plate (6066), a spring B (6067), a push switch (6068), and a spring C (6069); the inner column (6061) is fixedly connected to the lifting slide rod (604); the bottom of the sliding contact rod (6062) slides through the inner column (6061); the support column (6063) is a cylindrical structure with a hollow interior, and the upper and lower ends of the support column (6063) are fixedly connected to two groups of cylinders and the inner column (6061); one end of the pull rope (6064) slides into the interior of the inner column (6061), and the other side of the pull rope (6064) is fixedly connected to the sliding contact rod (6062); the top end of the limit support rod (6065) is slidably connected to the square plate inside the support column (6063); the surface of the lifting plate (6066) is fixedly connected to the limit support rod (6065); the bottom of the spring B (6067) contacts the lifting plate (6066); one fixed end of the push switch (6068) is fixedly connected to the square plate inside the support column (6063), and the push switch (6068) is electrically connected to the alarm lamp (605); the number of the springs C (6069) is set to two groups, and the springs C (6069) are installed on the surface of the sliding contact rod (6062).

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