Coal mine tunnel progressive support device comprising roof disaster emergency mechanism

Abstract

The invention discloses a coal mine tunnel progressive supporting device comprising a roof disaster emergency mechanism, and relates to the technical field of coal mine tunnel supporting equipment, the coal mine tunnel progressive supporting device comprises a plurality of supporting frames arranged side by side, and lifting mechanisms are arranged at the bottoms of the two sides of the supporting frames; the connecting rods are fixedly connected with the adjacent supporting frames; the two sets of side wall supporting devices are symmetrically distributed and fixed to the side, adjacent to the side wall of the roadway, of the supporting frame; the corner supporting device is fixed on the supporting frame and corresponds to the position between the side wall and the top of the roadway; the top plate supporting device is fixed between the corner supporting devices on the two sides and located on the top of the supporting frame. And the second-stage top plate is fixed between the supporting frames and located below the connecting rods. The method flexibly adapts to complex section deformation of the roadway, the surrounding rock pressure is dynamically dispersed, the impact load is actively buffered, and the full-section progressive protection effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine roadway support equipment, and more specifically, to a progressive support device for coal mine roadways with a roof disaster emergency mechanism. Background Art

[0002] As the core passage for coal mining, the stability of coal mine roadways is directly related to the safety of mine production. Traditional support technologies have obvious defects. Steel supports and wooden supports are prone to deformation and fracture due to insufficient strength. Rock support construction is difficult and costly. When pressure changes occur at some positions within the support range, it is difficult to take targeted countermeasures. Moreover, existing progressive support devices are difficult to adapt to the dynamic deformation of roadway sections under complex geological conditions and lack a multi-directional pressure dispersion mechanism. When the side walls are squeezed or the roof collapses, the structure is prone to failure due to single-point overload. When the roadway roof suddenly collapses, it is impossible to quickly form an effective support, resulting in the expansion of disasters. Therefore, it is necessary to provide a progressive support device for coal mine roadways with a roof disaster emergency mechanism to solve the problems raised in the above background art. Summary of the Invention

[0003] To achieve the above object, the present invention provides the following technical solution: A progressive support device for coal mine roadways with a roof disaster emergency mechanism, comprising:

[0004] Support frames, arranged in multiple rows side by side, with lifting mechanisms provided at the bottoms on both sides;

[0005] Connecting rods, fixedly connecting adjacent support frames;

[0006] Side wall support devices, symmetrically distributed in two groups, fixed on the side adjacent to the roadway side wall of the support frame;

[0007] Corner support devices, fixed on the support frame, corresponding to the position between the roadway side wall and the top;

[0008] Roof support devices, fixed between the two corner support devices on both sides, located at the top of the support frame;

[0009] Secondary roofs, fixed between the support frames, located below the connecting rods.

[0010] Further, as a preference, the side wall support device includes:

[0011] Fixed frames, fixed on the outside of the support frame;

[0012] First hydraulic shafts, symmetrically distributed in two groups, with multiple vertically distributed in each group, fixed on the fixed frame;

[0013] Connecting plates, fixedly connected to each group of first hydraulic shafts;

[0014] The side support plate is fixedly connected to the connecting plate and fits against the side wall of the roadway.

[0015] Further, preferably, the corner support device includes:

[0016] A connecting component that connects the support frame, the side wall support device, and the roof support device;

[0017] The corner support plate is slidably arranged on the connecting component and fits against the corner of the roadway;

[0018] A plurality of second hydraulic shafts are linearly distributed, with the bottom fixed on the connecting component and the top fitting against the corner support plate;

[0019] The buffer leaf spring is arranged at an interval from the second hydraulic shaft, with the middle fixedly connected to the connecting component and both ends slidably connected to the inner wall of the corner support plate.

[0020] Further, preferably, the connecting component includes:

[0021] A connecting body is fixed at the corner of the support frame, and both the second hydraulic shaft and the buffer leaf spring are fixed on the connecting body;

[0022] A connecting surface is fixed on the top of the side wall support device and fixedly connected to the connecting body;

[0023] A fixed vertical plate is fixed on the top of the support frame and connected to the roof support device.

[0024] Further, preferably, the roof support device includes:

[0025] A spacer plate is fixed on the top of the support frame and located between the two side connecting components;

[0026] Two sets of progressive support components are symmetrically distributed with respect to the spacer plate, and each set has a plurality of them linearly distributed and arranged between the spacer plate and the connecting component;

[0027] The third hydraulic shaft is correspondingly arranged with the progressive support component, and the bottom is fixed on the connecting rod between the support frames;

[0028] The support arc plate connects the corresponding third hydraulic shaft and the progressive support component.

[0029] Further, preferably, the progressive support component includes:

[0030] A central shaft has both ends slidably connected to the spacer plate and the connecting component respectively, and the bottom is fixedly connected to the support arc plate;

[0031] A rotating mechanism is rotatably arranged at both ends of the central shaft;

[0032] The telescopic support mechanism is symmetrically distributed in two groups and is fixedly connected to the rotating mechanism.

[0033] The positioning mechanism is symmetrically distributed in two groups. The two ends are respectively rotationally connected to the spacer plate and the connecting component, and the side part is fixedly connected to the side of the telescopic support mechanism away from the central axis.

[0034] Further, as an optimization, the rotating mechanism includes an inner rotating fixing member and an outer rotating fixing member rotatably arranged on the central axis. The inner rotating fixing member and the outer rotating fixing member are respectively fixedly connected to the telescopic support mechanisms on both sides.

[0035] Further, as an optimization, the telescopic support mechanism includes:

[0036] The outer support plate is fixedly connected to the rotating mechanism;

[0037] The inner support plate is slidably connected to the inner side of the outer support plate;

[0038] A plurality of support units are distributed in a honeycomb shape and are fixed on the top of the outer support plate and are in fit with the top of the roadway;

[0039] The semi-cylinder is fixed on the side of the outer support plate adjacent to the central axis, and the arc surface is in fit with the central axis.

[0040] Further, as an optimization, the positioning mechanism includes:

[0041] The rotating shaft is rotatably arranged between the spacer plate and the connecting component;

[0042] Two right-angle connecting pieces are symmetrically distributed and fixedly connect the rotating shaft and the inner support plate.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] In the present invention, through the coordinated facilities of the multi-support frame parallel lifting mechanism, the hydraulic-driven sidewall support device, the multi-directional buffer corner support device, and the progressive adaptive roof support system, the effects of flexibly adapting to the complex section deformation of the roadway, dynamically dispersing the surrounding rock pressure, actively buffering the impact load, and realizing the progressive protection of the entire section are achieved; through the multi-module design, the dynamic support response to the entire area of the roof, sidewalls, and corners of the roadway is realized. The support frame lifting mechanism cooperates with the connecting rod to form a grid-shaped load-bearing frame, significantly improving the structural stability; the hydraulic-driven support component can be in real-time fit with the surface deformation of the roadway, and effectively absorbs the impact energy in cooperation with the buffer leaf spring; the progressive deflection mechanism of the roof support system can dynamically expand the support area during disasters, form a multi-stage buffer space, and cooperate with the honeycomb-shaped support unit to achieve pressure dispersion, significantly enhancing the disaster resistance ability of the support system. Description of the Drawings

[0045] Figure 1It is a schematic diagram of the overall structure of a progressive roadway support device for coal mines with a roof disaster emergency mechanism;

[0046] Figure 2 It is a schematic diagram of the side wall support device and the corner support device;

[0047] Figure 3 It is a schematic diagram of the connection component and the roof support device;

[0048] Figure 4 It is a schematic diagram of the progressive support component;

[0049] Figure 5 It is a schematic diagram of the rotating mechanism and the telescopic support mechanism;

[0050] Figure 6 It is a schematic diagram of the positioning mechanism;

[0051] In the figure: 1. Support frame; 2. Connecting rod; 3. Side wall support device; 4. Corner support device; 5. Roof support device; 6. Secondary roof; 31. Fixed frame; 32. First hydraulic shaft; 33. Connecting plate; 34. Side support plate; 41. Connecting component; 42. Corner support plate; 43. Second hydraulic shaft; 44. Buffer leaf spring; 51. Spacer plate; 52. Progressive support component; 53. Third hydraulic shaft; 54. Support arc plate; 411. Connecting body; 412. Connecting surface; 413. Fixed vertical plate; 521. Central axis; 522. Rotating mechanism; 523. Telescopic support mechanism; 524. Positioning mechanism; 5221. Inner rotating fixed part; 5222. Outer rotating fixed part; 5231. Outer support plate; 5232. Inner support plate; 5233. Support unit; 5234. Semi-cylinder; 5241. Rotating shaft; 5242. Right-angle connecting piece. Detailed implementation mode

[0052] Please refer to Figures 1 to 6 , in the embodiment of the present invention, a progressive roadway support device for coal mines with a roof disaster emergency mechanism includes:

[0053] Support frames 1, arranged in parallel with multiple ones, and lifting mechanisms are provided at the bottoms of both sides;

[0054] Connecting rods 2, fixedly connecting adjacent support frames 1;

[0055] Side wall support devices 3, symmetrically distributed in two groups, and fixed on the side of the support frame 1 adjacent to the roadway side wall;

[0056] Corner support devices 4, fixed on the support frame 1, corresponding to the roadway side wall and the top;

[0057] Roof support devices 5, fixed between the two side corner support devices 4, located at the top of the support frame 1;

[0058] The secondary roof plate 6 is fixed between the support frames 1 and is located below the connecting rod 2.

[0059] In this embodiment, the support frame 1 serves as the basic frame of the entire support device. Multiple support frames are arranged side by side. The height is adjusted by the bottom lifting mechanism. Under the action of the lifting mechanism, the vertical position of the support frame 1 is controlled to adapt to the support requirements of different heights in the roadway, flexibly adapt to the change of the roadway cross-section, improve the versatility of the support device, and the multi-frame parallel structure disperses the pressure to avoid single-point overload. Under the action of the connecting rod 2, adjacent support frames 1 are fixedly connected to enhance the lateral stability of the overall frame. When the roadway deforms, the connecting rod 2 transmits the lateral force and cooperates with the support frame 1 to jointly resist the sidewall pressure.

[0060] In this embodiment, the sidewall support device 3 includes:

[0061] A fixed frame 31, which is fixed on the outside of the support frame 1;

[0062] The first hydraulic shafts 32 are symmetrically distributed in two groups, and multiple are vertically distributed in each group and are fixed on the fixed frame 31;

[0063] A connecting plate 33, which is fixedly connected to each group of the first hydraulic shafts 32;

[0064] A side support plate 34, which is fixedly connected to the connecting plate 33 and is in contact with the sidewall of the roadway.

[0065] That is to say, the fixed frame 31 is fixed on the outside of the support frame 1 and serves as the installation base for the first hydraulic shafts 32 and the side support plates 34. The first hydraulic shafts 32 are driven by hydraulic pressure to expand and contract, driving the connecting plate 33 and the side support plates 34 to closely adhere to the sidewall of the roadway, so that the side support plates 34 adapt to the deformation of the sidewall of the roadway and support and protect the sidewall of the roadway.

[0066] In this embodiment, the corner support device 4 includes:

[0067] A connection assembly 41, which connects the support frame 1, the sidewall support device 3 and the roof support device 5;

[0068] A corner support plate 42, which is slidably arranged on the connection assembly 41 and is in contact with the corner of the roadway;

[0069] The second hydraulic shafts 43 are linearly distributed in multiple numbers, the bottom is fixed on the connection assembly 41, and the top is in contact with the corner support plate 42;

[0070] A buffer leaf spring 44, which is arranged at an interval from the second hydraulic shafts 43, the middle is fixedly connected to the connection assembly 41, and both ends are slidably connected to the inner wall of the corner support plate 42.

[0071] That is to say, under the action of the connecting component 41, the pressure at the corner of the roadway is dispersed and buffered through the multi-directional fixing points, reducing the loss of the corner support plate 42 caused by the roadway pressure. The second hydraulic shaft 43 actively applies a pre-tightening force to the corner support plate 42 to support the roadway. When the corner support plate 42 is subjected to a pressure impact, the buffer leaf spring 44 undergoes non-linear deformation to absorb energy and carry out buffer protection.

[0072] In this embodiment, the connecting component 41 includes:

[0073] A connecting body 411, fixed at the corner of the support frame 1, and both the second hydraulic shaft 43 and the buffer leaf spring 44 are fixed on the connecting body 411;

[0074] A connecting surface 412, fixed at the top of the sidewall support device 3, and fixedly connected to the connecting body 411;

[0075] A fixed vertical plate 413, fixed at the top of the support frame 1, and connected to the roof support device 5.

[0076] That is to say, under the action of the connecting body 411, the positions of the second hydraulic shaft 43 and the buffer leaf spring 44 are restricted, and the corner support plate 42 is fitted to the corner of the roadway through the second hydraulic shaft 43 and the buffer leaf spring 44. The second hydraulic shaft 43 applies a thrust to the corner support plate 42 to support the corner of the roadway. When the corner support plate 42 deforms under the roadway pressure, the two ends of the corner support plate 42 slide on the connecting surface 412 and the fixed vertical plate 413. At the same time, the buffer leaf spring 44 deforms to absorb energy and carry out buffer protection, achieving the purpose of effective buffering and shock absorption while enhancing the structural stability.

[0077] In this embodiment, the roof support device 5 includes:

[0078] A spacer plate 51, fixed at the top of the support frame 1, located between the two side connecting components 41;

[0079] Progressive support components 52, symmetrically distributed in two groups with respect to the spacer plate 51, and each group is linearly distributed with multiple components, arranged between the spacer plate 51 and the connecting component 41;

[0080] A third hydraulic shaft 53, correspondingly arranged with the progressive support components 52, and its bottom is fixed on the connecting rod 2 between the support frames 1;

[0081] A support arc plate 54, connecting the corresponding third hydraulic shaft 53 and the progressive support components 52.

[0082] That is to say, under the action of the third hydraulic shaft 53 and the support arc plate 54, the progressive support assembly 52 is supported. When the third hydraulic shaft 53 extends, the channel support arc plate 54 enables the progressive support assembly 52 to support the top of the roadway. And under the action of the progressive support assembly 52, the dispersed support buffer is carried out on different pressure positions at the top of the roadway, and the deformation conditions of different positions of the roadway are responded to in real time. When sudden situations such as collapse occur at the top of the roadway, the corresponding progressive support assembly 52 is driven by the third hydraulic shaft 53 and the support arc plate 54, deforms concavely, expands the buffer space, increases the force-bearing area, effectively avoids directly impacting the support plate after the roadway is compressed and deformed, causing damage to the support plate, and effectively protects against disasters in the roadway.

[0083] In this embodiment, the progressive support assembly 52 includes:

[0084] A central shaft 521, with both ends slidably connected to the spacer plate 51 and the connection assembly 41 respectively, and the bottom fixedly connected to the support arc plate 54;

[0085] A rotating mechanism 522, rotatably arranged at both ends of the central shaft 521;

[0086] Two sets of telescopic support mechanisms 523 are symmetrically distributed and fixedly connected to the rotating mechanism 522;

[0087] Two sets of positioning mechanisms 524 are symmetrically distributed, with both ends rotatably connected to the spacer plate 51 and the connection assembly 41 respectively, and the side parts fixedly connected to the side of the telescopic support mechanism 523 away from the central shaft 521.

[0088] That is to say, under the action of the third hydraulic shaft 53 and the support arc plate 54, the central shaft 521 is driven to slide up and down between the spacer plate 51 and the fixed vertical plate 413. In the normal support state, the third hydraulic shaft 53 extends, and the central shaft 521 is pushed by the support arc plate 54 to be in a horizontal state with the telescopic support mechanism 523, completely fitting with the top of the roadway, and the telescopic support mechanism 523 supports and protects the roadway; when disasters such as excessive pressure and collapse occur at part of the top of the roadway, the third hydraulic shaft 53 below the corresponding progressive support assembly 52 contracts, the central shaft 521 is quickly pulled down by the support arc plate 54, and under the action of the rotating mechanism 522 and the positioning mechanism 524, the two-side telescopic support mechanisms 523 are driven to rotate to an inclined state, quickly expanding the buffer space, increasing the force-bearing area, carrying out buffer protection, and under the action of the secondary roof 6, effectively preventing some crushed stones from falling.

[0089] In this embodiment, the rotating mechanism 522 includes an inner rotating fixing part 5221 and an outer rotating fixing part 5222 rotatably arranged on the central shaft 521, and the inner rotating fixing part 5221 and the outer rotating fixing part 5222 are respectively fixedly connected to the two-side telescopic support mechanisms 523.

[0090] That is to say, during the up-and-down movement of the central shaft 521, under the restriction of the positioning mechanism 524, the inner rotating fixing member 5221 and the outer rotating fixing member 5222 rotate on the central shaft 521, driving the corresponding telescopic support mechanism 523 to deflect, adjusting the inclination angle of the telescopic support mechanism 523 to expand the buffer space and disperse and buffer the pressure on the top of the roadway.

[0091] In this embodiment, the telescopic support mechanism 523 includes:

[0092] An outer support plate 5231, fixedly connected to the rotating mechanism 522;

[0093] An inner support plate 5232, slidably connected to the inner side of the outer support plate 5231;

[0094] A plurality of support units 5233 are arranged in a honeycomb distribution, fixed on the top of the outer support plate 5231 and fitted to the top of the roadway;

[0095] A semi-cylinder 5234 is fixed on the side of the outer support plate 5231 adjacent to the central shaft 521, and the arc surface is fitted to the central shaft 521.

[0096] That is to say, in the normal support state, the third hydraulic shaft 53 extends, and through the support arc plate 54, the central shaft 521 is pushed to be in a horizontal state with the telescopic support mechanism 523, completely fitted to the top of the roadway. The support unit 5233 at the top of the telescopic support mechanism 523 supports and protects the roadway. For the different pressures generated at different positions on the top of the roadway, the corresponding support unit 5233 performs buffer adjustment, effectively preventing deformation and damage caused by uneven stress. When there are disasters such as collapse due to excessive pressure in part of the top of the roadway, at this time, it is difficult for the support unit 5233 to cope. The third hydraulic shaft 53 below the corresponding progressive support assembly 52 contracts, and through the support arc plate 54, the central shaft 521 is quickly pulled downwards. Under the action of the rotating mechanism 522 and the positioning mechanism 524, the telescopic support mechanisms 523 on both sides are driven to rotate to an inclined state, and the inner support plate 5232 extends out of the outer support plate 5231, quickly expanding the buffer space, increasing the stress area, and performing buffer protection. According to the pressure received, the position of the central shaft 521 can be dynamically adjusted to effectively protect against disasters in the roadway. Under the independent buffer adjustment of the support unit 5233 and the overall deformation adjustment of the telescopic support mechanism 523, the support strength is gradually adjusted according to the roadway pressure for progressive support.

[0097] In this embodiment, the positioning mechanism 524 includes:

[0098] A rotating shaft 5241, rotatably arranged between the spacer plate 51 and the connecting assembly 41;

[0099] There are two right-angle connectors 5242 symmetrically distributed, which fixedly connect the rotating shaft 5241 and the inner support plate 5232.

[0100] That is to say, under the action of the right-angle connector 5242, the rotating shaft 5241 and the inner support plate 5232 are fixed together. While the central shaft 521 drives the outer support plate 5231 to rotate through the rotating mechanism 522, the inner support plate 5232 slides inside the outer support plate 5231, and at the same time drives the rotating shaft 5241 to rotate between the spacer plate 51 and the fixed vertical plate 413 through the right-angle connector 5242 to adjust the support space.

[0101] During specific implementation, first arrange multiple support frames 1 side by side along the extension direction of the roadway, start the bottom lifting mechanism to adjust the vertical height of the support frame 1 so that the roof support device 5 initially contacts the top of the roadway, rigidly fix adjacent support frames 1 through the connecting rod 2, and fix the secondary roof 6 between the support frames 1 to form a grid-like frame structure. Weld the fixed frame 31 to the outside of the support frame 1, start the first hydraulic shaft 32 to extend in stages, push the side support plate 34 to gradually fit the side wall of the roadway, then dock the corner support device 4 with the roof support device 5 through the connecting component 41, apply a pre-tightening force to the second hydraulic shaft 43 to make the corner support plate 42 closely adhere to the corner of the roadway, and the third hydraulic shaft 53 extends synchronously. Through the support arc plate 54, the progressive support component 52 is pushed to form an initial support surface to support the roadway. For the different pressures generated at different positions on the top of the roadway, the corresponding support unit 5233 performs buffer adjustment to effectively prevent deformation and damage caused by uneven stress. When there are disasters such as collapse due to excessive pressure in some parts of the roadway roof, at this time, it is difficult for the support unit 5233 to cope. The third hydraulic shaft 53 below the corresponding progressive support component 52 contracts, and the central shaft 521 is quickly pulled down through the support arc plate 54. Under the action of the rotating mechanism 522 and the positioning mechanism 524, the two-side telescopic support mechanisms 523 are driven to rotate to an inclined state, and the inner support plate 5232 extends out of the outer support plate 5231 to form a "V"-shaped buffer space. The independent honeycomb structure of the support unit 5233 disperses the pressure, and the inner support plate 5232 extends to expand the support area for buffer protection.

[0102] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A progressive support device for coal mine tunnels with a roof disaster emergency mechanism, characterized in that: include: A plurality of support frames (1) are arranged side by side, and lifting mechanisms are provided at the bottom of both sides; A connecting rod (2) fixedly connecting adjacent support frames (1); The side wall support device (3) is symmetrically provided with two groups and is fixed on a side of the support frame (1) adjacent to the side wall of the tunnel; A corner support device (4) is fixed on the support frame (1) and corresponds to the side wall and the top of the tunnel; A top plate support device (5) is fixed between the corner support devices (4) on both sides and is located on the top of the support frame (1); The secondary top plate (6) is fixed between the support frames (1) and is located below the connecting rod (2).

2. A progressive support device for coal mine tunnels with a roof disaster emergency mechanism according to claim 1, characterized in that: The side wall supporting device (3) comprises: A fixed frame (31) fixed on the outer side of the supporting frame (1); The first hydraulic shaft (32) is symmetrically arranged in two groups, each group is vertically arranged with a plurality of shafts, and is fixed on the fixed frame (31); A connecting plate (33) fixedly connected to each set of first hydraulic shafts (32); The side support plate (34) is fixedly connected to the connecting plate (33) and fits against the side wall of the tunnel.

3. A progressive support device for coal mine tunnels with a roof disaster emergency mechanism according to claim 1, characterized in that: The corner support device (4) comprises: A connecting assembly (41) connecting the support frame (1), the side wall supporting device (3) and the top plate supporting device (5); A corner support plate (42) is slidably disposed on the connection assembly (41) and fits in the corner of the lane; A plurality of second hydraulic shafts (43) are linearly distributed, with the bottoms being fixed to the connection assembly (41) and the tops being in contact with the corner support plate (42); The buffer leaf spring (44) is spaced apart from the second hydraulic shaft (43), the middle portion of which is fixedly connected to the connection assembly (41), and the two ends of which are slidably connected to the inner wall of the corner support plate (42).

4. A coal mine tunnel progressive support device with a roof disaster emergency mechanism according to claim 3, characterized in that: The connection component (41) comprises: A connecting body (411) is fixed at a corner of the support frame (1), and the second hydraulic shaft (43) and the buffer leaf spring (44) are both fixed on the connecting body (411); A connecting surface (412) is fixed to the top of the side wall supporting device (3) and is fixedly connected to the connecting body (411); The fixed vertical plate (413) is fixed to the top of the support frame (1) and connected to the top plate supporting device (5).

5. The progressive support device for coal mine tunnels with a roof disaster emergency mechanism according to claim 3, characterized in that: The roof support device (5) comprises: A spacer plate (51) is fixed to the top of the support frame (1) and is located between the connecting components (41) on both sides; Two groups of progressive support components (52) are symmetrically distributed about the partition plate (51), and each group has a plurality of components distributed in a straight line, and are arranged between the partition plate (51) and the connecting component (41); A third hydraulic shaft (53) is arranged corresponding to the progressive support assembly (52), and the bottom of the third hydraulic shaft is fixed on the connecting rod (2) between the support frames (1); The supporting arc plate (54) is connected to the corresponding third hydraulic shaft (53) and the progressive support assembly (52).

6. A progressive support device for coal mine tunnels with a roof disaster emergency mechanism according to claim 5, characterized in that: The progressive support assembly (52) comprises: The central shaft (521) has two ends respectively connected in a sliding manner to the spacer plate (51) and the connecting assembly (41), and a bottom fixedly connected to the supporting arc plate (54); A rotating mechanism (522) is rotatably disposed at both ends of the central axis (521); The telescopic support mechanism (523) is symmetrically provided with two groups and is fixedly connected to the rotating mechanism (522); The positioning mechanism (524) is symmetrically distributed with two groups, with two ends respectively rotatably connected to the partition plate (51) and the connecting assembly (41), and a side portion fixedly connected to a side of the telescopic support mechanism (523) away from the central axis (521).

7. A coal mine tunnel progressive support device with a roof disaster emergency mechanism according to claim 6, characterized in that: The rotating mechanism (522) comprises an inner rotating fixing member (5221) and an outer rotating fixing member (5222) rotatably arranged on the central axis (521); the inner rotating fixing member (5221) and the outer rotating fixing member (5222) are respectively fixedly connected to the telescopic supporting mechanisms (523) on both sides.

8. The progressive support device for coal mine tunnels with a roof disaster emergency mechanism according to claim 6, characterized in that: The telescopic support mechanism (523) comprises: An outer supporting plate (5231) is fixedly connected to the rotating mechanism (522); An inner supporting plate (5232) is slidably connected to the inner side of the outer supporting plate (5231); A plurality of support units (5233) are provided in a honeycomb-shaped distribution and are fixed on the top of the outer support plate (5231) to fit the top of the tunnel; The semi-cylinder (5234) is fixed to a side of the outer supporting plate (5231) adjacent to the central axis (521), and the arc surface is in contact with the central axis (521).

9. A coal mine tunnel progressive support device with a roof disaster emergency mechanism according to claim 8, characterized in that: The positioning mechanism (524) comprises: A rotating shaft (5241) rotatably disposed between the partition plate (51) and the connecting assembly (41); Two right-angle connecting pieces (5242) are symmetrically arranged and fixedly connect the rotating shaft (5241) and the inner supporting plate (5232).

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