Rock burst protection mechanism for coal mine

Abstract

The utility model provides a rock burst protection mechanism for a coal mine. The rock burst protection mechanism comprises a fixed plate, a first protection plate, a second protection plate, an adjusting assembly, a cross beam, a protection assembly and a movable plate, the first protection plate is fixedly connected to one side of the fixing plate; the second protection plate is arranged at the top end of the first protection plate; the adjusting assembly is arranged between the first protection plate and the second protection plate; the cross beam is fixedly connected to one end of the second protection plate, and a reinforcing rod is obliquely fixed between the cross beam and the second protection plate; and the protection assembly is arranged at the top of the cross beam. According to the rock burst protection mechanism for the coal mine, through the structural design of the fixed plate, the first protection plate, the second protection plate, the adjusting assembly, the cross beam, the protection assembly, the movable plate and the buffer assembly, the protection height can be conveniently adjusted according to the environment of a mine tunnel, burst fragments can be conveniently buffered, the protection effect is improved, and the safety of workers is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of impact ground pressure protection mechanism for coal mine. BACKGROUND

[0002] Impact ground pressure generally refers to rock burst, and rock burst refers to the phenomenon that sudden damage occurs in free rock mass in deep or high tectonic stress area of underground mining. This phenomenon is also known as rock burst. The cause of the phenomenon is that the strain energy accumulated in the free rock mass is suddenly and violently released, causing the rock mass to break like an explosion, with brittle fracture. With the gradual development of coal resources in China, the mining depth of coal resources gradually develops from shallow to deep, and the structural characteristics, deformation and failure characteristics, energy release characteristics and engineering response characteristics of deep coal rock mass are significantly different from those of shallow, which is more prone to induce impact ground pressure disasters, causing serious damage and personnel casualties in the mine. With the increase of mining depth, the stress in the coal body increases, and the likelihood of impact ground pressure increases. Therefore, it is necessary to use a protection mechanism during coal mining to avoid the threat of impact ground pressure to the life and health safety of workers in the mine.

[0003] The protection mechanism for impact ground pressure in coal mines on the market cannot adjust the height, and the environment in the mine is not the same. The height of a single device cannot adapt to different environments, and ordinary protection mechanisms are easily damaged by fragments ejected by impact ground pressure, resulting in poor protection effect and easy misprotection, which may cause accidents. SUMMARY

[0004] The utility model discloses a kind of impact ground pressure protection mechanisms for coal mine to solve the technical problems that the height of existing protection mechanism cannot be adjusted, the environment in the mine is not the same, the height of a single device cannot adapt to different environments, and ordinary protection mechanisms are easily damaged by fragments ejected by impact ground pressure, resulting in poor protection effect and easy misprotection, which may cause accidents.

[0005] The utility model discloses a kind of impact ground pressure protection mechanisms for coal mine to solve the technical problems that the height of existing protection mechanism cannot be adjusted, the environment in the mine is not the same, the height of a single device cannot adapt to different environments, and ordinary protection mechanisms are easily damaged by fragments ejected by impact ground pressure, resulting in poor protection effect and easy misprotection, which may cause accidents.

[0006] The utility model provides impact ground pressure protection mechanism for coal mine, including fixed plate and first protection plate, first protection plate is fixedly connected in one side of fixed plate, still include:

[0007] Second protection plate, second protection plate is arranged at the top of first protection plate;

[0008] Adjusting assembly, adjusting assembly is arranged between first protection plate and second protection plate;

[0009] Crossbeam, crossbeam is fixedly connected to one end of second protection plate, reinforcing rod is fixedly inclined between crossbeam and second protection plate;

[0010] A protection assembly is arranged on the top of the cross beam.

[0011] A movable plate is arranged on the top end of the cross beam, and the top end of the movable plate is provided with a buffer plate.

[0012] A buffer assembly is arranged on the top of the movable plate.

[0013] In the technical solution, the first protection plate and the second protection plate are arranged to facilitate intercepting the fragments ejected from the side of the mine tunnel, improve the protection effect, the adjusting assembly is arranged to facilitate adjusting the height of the protection according to the environment of the mine tunnel, and the protection assembly is arranged to facilitate buffering the ejected fragments and avoiding the ejected fragments from destroying the protection mechanism.

[0014] Preferably, the number of the first protection plates is two, and the side wall of the fixed plate and the first protection plate is inserted with a plurality of insertion rods.

[0015] In the technical solution, the insertion rods arranged at the bottom end of the first protection plate and the side wall facilitate fixing in the mine tunnel.

[0016] Preferably, the top end of the first protection plate is fixedly connected with a first baffle, the inside of the first baffle is provided with a connecting groove, the inside of the connecting groove is slidably connected with a second baffle, and the second baffle is fixedly connected to the bottom end of the second protection plate.

[0017] In the technical solution, the first baffle, the connecting groove and the second baffle are arranged to facilitate the second protection plate driving the second baffle to be extracted from the first baffle through the connecting groove, and the side protection effect can still be provided along with the distance change between the first protection plate and the second protection plate.

[0018] Preferably, the adjusting assembly comprises a bidirectional screw rod, a knob, a movable seat, a guide groove, a guide block and a support rod, the bidirectional screw rod is rotationally connected to the top of the first protection plate, the movable seat is threadedly connected to the bidirectional screw rod, the knob is rotationally connected to one side of the first protection plate, the guide block is fixedly connected to the bottom end of the movable seat, the guide groove is arranged on the top of the first protection plate, the support rod is rotationally connected to the top of the movable seat and the bottom of the second protection plate, and one end of the bidirectional screw rod penetrates through one side of the first protection plate and is fixedly connected with the knob.

[0019] In the technical solution, the knob is rotated to drive the bidirectional screw rod to rotate, the bidirectional screw rod is screwed with the two movable seats, the movable seats drive the guide blocks to slide along the guide grooves under the action of the bidirectional screw rod, the movable seats on the two sides of the bidirectional screw rod move and approach each other, the movable seats push the second protective plate upward through the supporting rods, the second protective plate drives the second baffle to slide upward along the connecting groove in the first baffle, so that the second protective plate drives the movable plate and the buffer plate to move upward and abut against the mine tunnel wall, thereby facilitating the use of the mine tunnel protection at different heights.

[0020] Preferably, the protection assembly comprises a limiting groove, a movable groove, a movable block and a first spring, the movable groove is opened at the top of the beam on both sides, the limiting groove is arranged at the top of the movable groove, the movable block is slidingly connected inside the movable groove and the limiting groove, and the first spring is fixedly connected to the two ends of the movable block.

[0021] In the technical solution, the limiting groove, the movable groove and the movable block are arranged, so as to facilitate the left and right movement of the movable plate.

[0022] Preferably, the top of the movable plate is fixedly connected with a fixed cylinder on both sides, a limiting block is slidingly connected inside the fixed cylinder, the limiting block is a T-shaped block, a buffer plate is fixedly connected to the top of the limiting block, and a second spring is fixedly connected between the limiting block and the inner wall of the fixed cylinder.

[0023] In the technical solution, the buffer plate extrudes the second spring inside the fixed cylinder through the limiting block, and the second spring is compressed and stored.

[0024] Preferably, the buffer plate is an arc-shaped plate, a buffer pad is fixedly connected to the top arc surface of the buffer plate, and an arc-shaped rubber plate is fixedly connected to the bottom of the buffer plate.

[0025] In the technical solution, when the buffer plate is subjected to vertical kinetic energy of fragments, the buffer plate extrudes the second spring inside the fixed cylinder through the limiting block, and the second spring is compressed and stored.

[0026] Preferably, the buffer assembly comprises a fixed groove, a third spring, a pressing block, a movable rod and a roller, the fixed groove is opened at the top of the movable plate, the pressing block is slidingly connected inside the fixed groove, the third spring is fixedly connected between the pressing block and the inner wall of the fixed groove, the movable rod is rotatably connected to the top of the pressing block, and the roller is installed at the top of the movable rod.

[0027] In the technical solution, the roller extrudes the pressing block through the movable rod, the pressing block moves downward along the fixed groove and extrudes the third spring, and the third spring is compressed and stored.

[0028] Preferably, the buffer assembly further comprises a side groove, a side block, a fourth spring and a connecting rod, the side groove is arranged on both sides of the top of the movable plate, the side block is slidingly connected to the side groove, the fourth spring is fixedly connected between the inner wall of the side groove and the side block, and the connecting rod is rotationally connected to the top of the side block and one end of the movable rod.

[0029] In the technical solution, the movable rod is inclined during downward movement and pushes the side block to slide along the side groove through the connecting rod, the side block moves and compresses the fourth spring, the second spring, the third spring and the fourth spring absorb a large amount of vertical kinetic energy from the buffer plate and convert the kinetic energy into elastic potential energy, after the impact force of the fragments on the buffer plate reaches the limit, the second spring, the third spring and the fourth spring release the large amount of elastic potential energy accumulated to reset the limiting block, the pressing block and the side block and lift the buffer plate upward, at this time, the fragments lose a large amount of kinetic energy carried, so that the threat of the fragments produced by rock burst is greatly reduced, and the safety and protection capability are improved.

[0030] Preferably, the rollers at the top end of the movable rod are rollingly connected to the bottom end surface of the rubber plate, and the rollers are symmetrically distributed on both sides of the rubber plate.

[0031] In the technical solution, the buffer plate drives the rubber plate to press the rollers downward when following the fragments to press downward, the rollers roll along the outer wall of the rubber plate, and the friction generated by the rolling of the rollers and the rubber plate weakens the impact on the buffer plate.

[0032] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred examples of the utility model are obtained.

[0033] The positive progress effect of the utility model lies in that:

[0034] The impact ground pressure protection mechanism for coal mines has the advantages that the height of protection can be adjusted according to the environment of the mine tunnel, the ejected fragments can be buffered conveniently, the ejected fragments can be prevented from destroying the protection mechanism, the protection effect is improved, and the safety of the workers is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a three-dimensional structure schematic view of the impact ground pressure protection mechanism for coal mines.

[0036] Figure 2 It is an internal front view structure schematic view of the impact ground pressure protection mechanism for coal mines.

[0037] Figure 3 It is a structure schematic view of the adjusting assembly in the impact ground pressure protection mechanism for coal mines.

[0038] Figure 4 For Figure 2 Local enlarged structural diagram at A in the middle.

[0039] Reference signs

[0040] 1, fixed plate; 2, first guard plate; 21, plug rod; 3, second guard plate; 31, first baffle; 32, second baffle; 33, connecting groove; 4, adjusting assembly; 41, bidirectional screw; 42, knob; 43, movable seat; 44, guide groove; 45, guide block; 46, support rod; 5, cross beam; 51, reinforcing rod; 6, guard assembly; 61, limiting groove; 62, movable groove; 63, movable block; 64, first spring; 7, movable plate; 71, fixed cylinder; 72, second spring; 73, limiting block; 74, buffer plate; 75, buffer pad; 8, rubber plate; 9, buffer assembly; 91, fixed groove; 92, third spring; 93, pressing block; 94, movable rod; 95, roller; 96, side groove; 97, side block; 98, fourth spring; 99, connecting rod. DETAILED DESCRIPTION

[0041] The utility model will be further illustrated by the following examples, but the utility model is not limited in the scope of the examples.

[0042] Figures 1 to 4 As shown in the figure, an embodiment of the utility model is used for the impact ground pressure protection mechanism of coal mine, including fixed plate 1 and first guard plate 2, first guard plate 2 is fixedly connected to one side of fixed plate 1, still including:

[0043] Second guard plate 3, second guard plate 3 is arranged at the top of first guard plate 2;

[0044] Adjusting assembly 4, adjusting assembly 4 is arranged between first guard plate 2 and second guard plate 3;

[0045] Cross beam 5, cross beam 5 is fixedly connected to one end of second guard plate 3, and reinforcing rod 51 is fixedly inclined between cross beam 5 and second guard plate 3;

[0046] Guard assembly 6, guard assembly 6 is arranged at the top of cross beam 5;

[0047] Movable plate 7, movable plate 7 is arranged at the top of cross beam 5, and buffer plate 74 is arranged at the top of movable plate 7;

[0048] Buffer assembly 9, buffer assembly 9 is arranged at the top of movable plate 7.

[0049] Specifically, the first guard plate 2 and the second guard plate 3 are arranged, so that the fragments ejected from the side of the mine tunnel can be intercepted, the protection effect is improved, the adjusting assembly 4 is arranged, so that the height of the protection can be adjusted according to the environment of the mine tunnel, and the protection assembly 6 is arranged, so that the ejected fragments can be buffered, and the ejected fragments can be prevented from destroying the protection mechanism.

[0050] As shown in Figures 1 to 4 , the number of the first guard plate 2 is two, and the side wall of the fixed plate 1 and the first guard plate 2 is provided with a plurality of insertion rods 21.

[0051] Specifically, the insertion rod 21 arranged at the bottom end and the side wall of the first guard plate 2 is convenient for fixing in the mine tunnel.

[0052] As shown in Figures 1 to 4 , the top end of the first guard plate 2 is fixedly connected with the first baffle 31, the inside of the first baffle 31 is provided with a connecting groove 33, the inside of the connecting groove 33 is slidably connected with the second baffle 32, and the second baffle 32 is fixedly connected to the bottom end of the second guard plate 3.

[0053] Specifically, the first baffle 31, the connecting groove 33 and the second baffle 32 are arranged, so that the second baffle 32 can be pulled out of the first baffle 31 through the connecting groove 33, and the distance between the first guard plate 1 and the second guard plate 2 changes, and the side protection effect can still be provided.

[0054] As shown in Figures 1 to 4 , the adjusting assembly 4 comprises a bidirectional screw 41, a knob 42, a movable seat 43, a guide groove 44, a guide block 45 and a supporting rod 46, the bidirectional screw 41 is rotatably connected to the top of the first guard plate 2, the movable seat 43 is threadedly connected to the bidirectional screw 41, the knob 42 is rotatably connected to one side of the first guard plate 2, the guide block 45 is fixedly connected to the bottom end of the movable seat 43, the guide groove 44 is formed in the top of the first guard plate 2, the supporting rod 46 is rotatably connected to the top of the movable seat 43 and the bottom of the second guard plate 3, and one end of the bidirectional screw 41 penetrates one side of the first guard plate 2 and is fixedly connected with the knob 42.

[0055] Specifically, rotating the knob 42 drives the bidirectional screw 41 to rotate, and the bidirectional screw 41 is screwed with the two movable seats 43, and the movable seats 43 drive the guide blocks 45 to slide along the guide grooves 44 under the action of the bidirectional screw 41, and the movable seats 43 on both sides of the bidirectional screw 41 move and approach each other, and the movable seats 43 push the second protective plate 3 upward through the support rods 46, and the second protective plate 3 drives the second baffle 32 to slide upward along the connecting groove 33 in the first baffle 31, so that the second protective plate 3 drives the movable plate 7 and the buffer plate 74 to move upward and abut against the mine tunnel wall, facilitating the use of the mine tunnel protection at different heights.

[0056] As shown in Figures 1 to 4 , the protective assembly 6 comprises a limiting groove 61, a movable groove 62, a movable block 63 and a first spring 64, the movable groove 62 is opened on both sides of the top of the cross beam 5, the limiting groove 61 is arranged on the top of the movable groove 62, the movable block 63 is slidably connected inside the movable groove 62 and the limiting groove 61, and the first spring 64 is fixedly connected to both ends of the movable block 63. The top end of the movable block 63 is fixedly connected to the bottom end of the movable plate 7.

[0057] Specifically, the left and right movement of the movable plate 7 is facilitated by the limiting groove 61, the movable groove 62 and the movable block 63.

[0058] As shown in Figures 1 to 4 , the top end of the movable plate 7 is fixedly connected with a fixed cylinder 71 on both sides, the inside of the fixed cylinder 71 is slidably connected with a limiting block 73, the limiting block 73 is a T-shaped block, the top end of the limiting block 73 is fixedly connected with a buffer plate 74, and the limiting block 73 and the inner wall of the fixed cylinder 71 are fixedly connected with a second spring 72.

[0059] Specifically, the buffer plate 74 extrudes the second spring 72 inside the fixed cylinder 71 through the limiting block 73, and the second spring 72 is compressed and stored.

[0060] As shown in Figures 2 to 4 , the buffer plate 74 is an arc-shaped plate, the top end of the arc surface of the buffer plate 74 is fixedly connected with a buffer pad 75, and the bottom of the buffer plate 74 is fixedly connected with an arc-shaped rubber plate 8.

[0061] Specifically, when the buffer plate 74 is subjected to vertical kinetic energy of fragments, the buffer plate 74 extrudes the second spring 72 inside the fixed cylinder 71 through the limiting block 73, and the second spring 72 is compressed and stored.

[0062] As shown in Figures 1 to 4As shown, the buffer assembly 9 includes a fixed groove 91, a third spring 92, a pressure block 93, a movable rod 94, and a roller 95. The fixed groove 91 is opened at the top of the movable plate 7. The pressure block 93 is slidably connected inside the fixed groove 91. The third spring 92 is fixedly connected between the pressure block 93 and the inner wall of the fixed groove 91. The movable rod 94 is rotatably connected to the top of the pressure block 93. The roller 95 is installed at the top of the movable rod 94.

[0063] Specifically, the roller 95 presses the pressure block 93 through the movable rod 94, the pressure block 93 moves down along the fixed groove 91 and presses the third spring 92, and the third spring 92 is compressed and stores energy.

[0064] like Figures 1 to 4 As shown, the buffer assembly 9 also includes a side groove 96, a side block 97, a fourth spring 98, and a connecting rod 99. The side groove 96 is opened on both sides of the top of the movable plate 7. The side block 97 is slidably connected to the side groove 96. The fourth spring 98 is fixedly connected between the inner wall of the side groove 96 and the side block 97. The connecting rod 99 is rotatably connected to the top of the side block 97 and one end of the movable rod 94.

[0065] Specifically, during its downward movement, the movable rod 94 tilts and pushes the side block 97 to slide along the side groove 96 via the connecting rod 99. The side block 97 moves and compresses the fourth spring 98. The second spring 72, the third spring 92, and the fourth spring 98 absorb a large amount of vertical kinetic energy from the buffer plate 74 and convert it into elastic potential energy. After the impact force of the fragments on the buffer plate 74 reaches its limit, the second spring 72, the third spring 92, and the fourth spring 98 release the large amount of accumulated elastic potential energy, causing the limiting block 73, the pressure block 93, and the side block 97 to reset and push the buffer plate 74 upward. At this point, the fragments lose the large amount of kinetic energy they carry, which greatly reduces the threat of the fragments generated by the rockburst and improves safety and protection capabilities.

[0066] like Figures 1 to 4 As shown, the roller 95 at the top of the movable rod 94 is rotatably connected to the bottom surface of the rubber plate 8, and the roller 95 is symmetrically distributed on both sides of the rubber plate 8.

[0067] Specifically, when the buffer plate 74 follows the downward pressure of the fragments, it causes the rubber plate 8 to press down on the roller 95. The roller 95 rolls along the outer wall of the rubber plate 8. The friction generated by the rolling of the roller 95 and the rubber plate 8 reduces the impact on the buffer plate 74.

[0068] The use principle of the present application: in use, the bottom end and the side wall of the two first protective plates 2 are inserted into the ground and the wall inside the mine, so that the position of the first protective plate 2 is fixed, then the knob 42 is turned, the knob 42 drives the bidirectional screw rod 41 to rotate, the bidirectional screw rod 41 is screwed with the two movable seats 43, the movable seats 43 drive the guide blocks 45 to slide along the guide grooves 44 under the action of the bidirectional screw rod 41, the movable seats 43 on both sides of the bidirectional screw rod 41 move and approach each other, the movable seats 43 push the second protective plate 3 up through the supporting rods 46, the second protective plate 3 drives the second baffle 32 to slide up along the connecting groove 33 inside the first baffle 31, so that the second protective plate 3 drives the movable plate 7 and the buffer plate 74 to move up and abut against the mine wall, which is convenient for adapting to the protection of mines with different heights, when rock burst occurs, the ejected fragments of rock burst impact on the buffer pad 75 at the top end of the buffer plate 74, because the fragments themselves carry a certain horizontal velocity, the buffer plate 74 makes the movable plate 7 move horizontally by force through the fixing cylinder 71 and the limiting block 73, so that the movable block 63 connected with the movable plate 7 also moves, the movement of the movable block 63 drives the two first springs 64 on both sides to be compressed on one side and stretched on the other side, so that the two first springs 64 store energy at the same time, so that when the buffer plate 74 moves with the fragments, the horizontal kinetic energy of the fragments is largely absorbed by the buffer plate 74 and the buffer pad 75 and is mostly converted into elastic potential energy of the first spring 64, after the fragments lose most of the kinetic energy, the two first springs 64 begin to release the stored elastic potential energy and reset the buffer plate 74, greatly reducing the horizontal kinetic energy of the fragments, avoiding damage caused by the fragments hitting the machine or the staff, when the buffer plate 74 is subjected to vertical kinetic energy of the fragments, the buffer plate 74 extrudes the second spring 72 inside the fixing cylinder 71 through the limiting block 73, the second spring 72 is compressed and stores energy, so that the buffer plate 74 drives the rubber plate 8 to extrude the roller 95 downward when it follows the fragments to press down, the roller 95 rolls along the outer wall of the rubber plate 8, the friction generated by the rolling of the roller 95 and the rubber plate 8 weakens the impact on the buffer plate 74, at the same time, the roller 95 extrudes the pressing block 93 through the movable rod 94, the pressing block 93 moves downward along the fixed groove 91 and extrudes the third spring 92, the third spring 92 is compressed and stores energy, the movable rod 94 inclines during the downward movement and pushes the side block 97 to slide along the side groove 96 through the connecting rod 99, the side block 97 moves and compresses the fourth spring 98, the second spring 72, the third spring 92 and the fourth spring 98 largely absorb the vertical kinetic energy from the buffer plate 74 and convert it into elastic potential energy, when the impact force of the fragments on the buffer plate 74 reaches the limit, at this time, the second spring 72, the third spring 92 and the fourth spring 98 release a large amount of elastic potential energy to reset the limiting block 73, the pressing block 93 and the side block 97 and lift the buffer plate 74 upward, at this time, the fragments lose a large amount of kinetic energy, so that the threat of the fragments produced by rock burst is greatly reduced, the safety and protection ability are improved.

[0069] The utility model is not limited to the above-mentioned embodiment, no matter makes any change in its shape or structure, all falls in the protection scope of the utility model. The protection scope of the utility model is defined by the appended claims, and the skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall into the protection scope of the utility model.

Claims

1. A rockburst protection mechanism for coal mines, comprising a fixed plate (1) and a first protective plate (2), wherein the first protective plate (2) is fixedly connected to one side of the fixed plate (1), characterized in that, Also includes: The second protective plate (3) is disposed at the top of the first protective plate (2); Adjustment component (4), the adjustment component (4) is disposed between the first protective plate (2) and the second protective plate (3); A crossbeam (5) is fixedly connected to one end of the second protective plate (3), and a reinforcing rod (51) is obliquely fixed between the crossbeam (5) and the second protective plate (3); A protective component (6) is disposed on the top of the crossbeam (5); Movable plate (7), the movable plate (7) is disposed at the top of the crossbeam (5), and a buffer plate (74) is disposed at the top of the movable plate (7); A buffer assembly (9) is disposed on top of the movable plate (7).

2. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: There are two first protective plates (2), and several rods (21) are inserted into the side wall of the first protective plate (2) and the fixing plate (1).

3. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: A first baffle (31) is fixedly connected to the top of the first protective plate (2). A connecting groove (33) is provided inside the first baffle (31). A second baffle (32) is slidably connected inside the connecting groove (33). The second baffle (32) is fixedly connected to the bottom of the second protective plate (3).

4. The rockburst protection mechanism for coal mines as described in claim 3, characterized in that: The adjustment assembly (4) includes a bidirectional screw (41), a knob (42), a movable seat (43), a guide groove (44), a guide block (45), and a support rod (46). The bidirectional screw (41) is rotatably connected to the top of the first protective plate (2). The movable seat (43) is threadedly connected to the bidirectional screw (41). The knob (42) is rotatably connected to one side of the first protective plate (2). The guide block (45) is fixedly connected to the bottom of the movable seat (43). The guide groove (44) is opened at the top of the first protective plate (2). The support rod (46) is rotatably connected to the top of the movable seat (43) and the bottom of the second protective plate (3). One end of the bidirectional screw (41) passes through one side of the first protective plate (2) and is fixedly connected to the knob (42).

5. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: The protective component (6) includes a limiting groove (61), a movable groove (62), a movable block (63), and a first spring (64). The movable groove (62) is opened on both sides of the top of the crossbeam (5). The limiting groove (61) is set on the top of the movable groove (62). The movable block (63) is slidably connected inside the movable groove (62) and the limiting groove (61). The first spring (64) is fixedly connected to both ends of the movable block (63). The top end of the movable block (63) is fixedly connected to the bottom end of the movable plate (7).

6. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: Fixed cylinders (71) are fixedly connected to both sides of the top of the movable plate (7). A limiting block (73) is slidably connected inside the fixed cylinder (71). The limiting block (73) is a T-shaped block. A buffer plate (74) is fixedly connected to the top of the limiting block (73). A second spring (72) is fixedly connected between the limiting block (73) and the inner wall of the fixed cylinder (71).

7. The rockburst protection mechanism for coal mines as described in claim 6, characterized in that: The buffer plate (74) is an arc-shaped plate. A buffer pad (75) is fixedly connected to the top arc surface of the buffer plate (74), and an arc-shaped rubber plate (8) is fixedly connected to the bottom of the buffer plate (74).

8. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: The buffer assembly (9) includes a fixed groove (91), a third spring (92), a pressure block (93), a movable rod (94), and a roller (95). The fixed groove (91) is opened at the top of the movable plate (7). The pressure block (93) is slidably connected inside the fixed groove (91). The third spring (92) is fixedly connected between the pressure block (93) and the inner wall of the fixed groove (91). The movable rod (94) is rotatably connected to the top of the pressure block (93). The roller (95) is installed at the top of the movable rod (94).

9. The rockburst protection mechanism for coal mines as described in claim 1, characterized in that: The buffer assembly (9) further includes a side groove (96), a side block (97), a fourth spring (98), and a connecting rod (99). The side groove (96) is opened on both sides of the top of the movable plate (7). The side block (97) is slidably connected to the side groove (96). The fourth spring (98) is fixedly connected between the inner wall of the side groove (96) and the side block (97). The connecting rod (99) is rotatably connected to the top of the side block (97) and one end of the movable rod (94).

10. The rockburst protection mechanism for coal mines as described in claim 9, characterized in that: The roller (95) at the top of the movable rod (94) is rotatably connected to the bottom surface of the rubber plate (8), and the roller (95) is symmetrically distributed on both sides of the rubber plate (8).

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