Temporary safety support frame for coal mine tunnel

Abstract

The invention discloses a temporary safety supporting frame for a coal mine tunnel, which relates to the supporting technology of the coal mine tunnel, and comprises supporting upright posts which are symmetrically distributed left and right, and wheel set brackets which are fixedly mounted at the bottom ends of the supporting upright posts, and moving wheel sets are rotationally arranged in the wheel set brackets; an adjusting mechanism is arranged at the upper end of the supporting stand column and comprises an extension stand column, and an extension transverse frame is fixedly installed at the top end of the extension stand column. An anti-falling holding frame is fixedly arranged outside the inner end of the right extension transverse frame; a protection mechanism is arranged at the upper end of the supporting stand column and comprises a protection display plate. According to the temporary safety supporting frame for the coal mine tunnel, the height and the width are adjusted through the extension stand columns above the supporting stand columns and the extension transverse frames, meanwhile, the locking arc plate descends to lock the moving wheel sets, the top wall of the coal mine tunnel is protected through the protection display plate and the adaptive display plate, and the safety of supporting in the coal mine tunnel is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mine roadway support technology, specifically to temporary safety support frames for coal mine roadways. Background Technology

[0002] Coal mine roadways are networks of passages excavated during underground mining for transporting ore, ventilation, drainage, and personnel passage. Functionally, they are divided into exploration roadways, production roadways, and preparation roadways. Their structure includes the roof, floor, sides, and working face, with exits leading to the surface. After excavation, the surrounding rock is prone to deformation or collapse due to its own weight and external pressure, requiring support to maintain stability and ensure operational safety. For example, loose coal seams under roof pressure are prone to falling, necessitating temporary supports such as wooden stakes. In deep mining, softening of the surrounding rock leads to floor bulging and sidewall compression, requiring reinforced support. The invention disclosed in CN112780320A is a temporary support device for coal mines. The device uses a drive unit to drive the mounting box to slide upward along the guide plate, thereby supporting the roadway roof with the support plate above the mounting box and preventing the roadway roof from collapsing. Then, the drive screw column is rotated, causing the drive column to move downward. During the downward movement of the drive column, the moving rod is pushed to slide laterally. While the moving rod is sliding, the push rod and the upright are moved upward, thereby driving the support plate to move upward and enhancing the support effect on the roadway roof.

[0003] The invention disclosed in CN117211843B is a coal mine roof support device. When the second gear rotates, it drives the rack to slide down on the connecting cover. After the side support beam and pulley seat match the roof, the position of each pulley seat changes. When the first hydraulic rod drives the support longitudinal beam, it changes the inclination angle of the main support crossbeam and the support longitudinal beam to match the roof of the upper and lower slope sections, thereby improving the support performance, preventing large-area voids between the device and the roof, which would lead to insufficient support force, and eliminating the need for multiple adjustments of the lifting distance by the hydraulic transmission rod.

[0004] However, the aforementioned temporary support frames for coal mine roadways still have the following problems in actual use: they provide support and protection for coal mine roadways through lifting and supporting components, but the lifting components of such support frames have many supporting parts, which seriously occupy the passage space in the narrow coal mine roadways, making it impossible for vehicles to pass effectively inside the coal mine roadways. At the same time, the support area of ​​such support frames is small, and a large number of support frames need to be arranged inside the same section of the roadway to form protection against falling and collapse.

[0005] Therefore, we proposed a temporary safety support frame for coal mine roadways to address the aforementioned issues. Summary of the Invention

[0006] The purpose of this invention is to provide a temporary safety support frame for coal mine roadways. This addresses the problem that existing support frames use lifting and supporting components to provide support and protection for coal mine roadways. However, the lifting components of such support frames have many supporting parts, which severely obstruct the passage of vehicles in the narrow coal mine roadways, making it difficult for vehicles to pass effectively. In addition, the support area of ​​such support frames is small, and a large number of support frames need to be arranged in the same section of the roadway to form a protective structure against falls and collapses.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a temporary safety support frame for coal mine roadways, comprising support columns symmetrically distributed on the left and right, and a wheel set bracket fixedly installed at the bottom of the support columns, wherein the wheel set bracket is internally equipped with a movable wheel set for rotation. The upper end of the support column is provided with an adjustment mechanism, and the adjustment mechanism includes an extension column, and an extension crossbar is fixedly installed at the top of the extension column. The extension crossbars are arranged in pairs and are nested together in the same shape but opposite directions. An anti-detachment bracket is fixedly installed on the outside of the inner end of the extension crossbar. The upper end of the support column is provided with a protective mechanism, which includes a protective display panel, and an adapter display panel is slidably installed inside the protective display panel.

[0008] Preferably, the adjustment mechanism includes an extension column that slides through the upper end of the support column, and the upper inner end of the extension column is rotatably connected to the upper end of the lifting screw via a bearing, and the lower end of the lifting screw is threaded through and connected to the upper end of the transmission bracket, and the bottom end of the transmission bracket is fixedly installed at the lower inner end of the support column.

[0009] Preferably, the adjustment mechanism includes a limiting slide plate, and the middle part of the limiting slide plate is slidably disposed inside the lower end of the support column. The limiting slide plate and the support column are connected to each other by a return spring, and locking arc plates are fixedly disposed on both the front and rear sides of the bottom of the limiting slide plate.

[0010] Preferably, the adjusting mechanism includes locking arc plates distributed on the front and rear sides of the upper end of the wheel set bracket, the upper end of the movable wheel set passes through the upper outside of the wheel set bracket and is correspondingly distributed with the locking arc plates, and magnetic suction components are provided at the middle of the top surface of the limiting slide and the bottom end of the lifting screw.

[0011] Preferably, the limiting slide plate included in the adjustment mechanism is brought close to the lifting screw through the magnetic attraction component in the initial state, without locking the moving wheel assembly through the locking arc plate on the bottom surface, and the magnetic attraction force of the magnetic attraction component is greater than the elastic force of the return spring. At the same time, after the magnetic attraction components move away from each other, the limiting slide plate and the locking arc plate lock the moving wheel assembly.

[0012] Preferably, the adjustment mechanism includes an adjustment screw that is rotatably mounted inside the right extension crossbeam via a bearing, and the adjustment screw is threaded through and connected to the inner end of the left extension crossbeam. The left and right extension crossbeams are connected to each other by an external anti-detachment bracket, and an oblique connecting rod is fixedly installed between the bottom surface of the extension crossbeam and the extension column.

[0013] Preferably, the protective mechanism includes a protective crossbeam, which is fixedly installed on the top surface of the left and right extended crossbeams. A contact cone is slidably provided on the top surface of the protective crossbeam, and the bottom end of the contact cone is slidably provided inside the protective crossbeam by a contact spring.

[0014] Preferably, the upper end of the protective display panel included in the protective mechanism is rotatably mounted on the outside of the protective crossbeam via a torsion spring, and the bottom surface of the protective display panel is fixedly connected to the outer end of the traction steel cable, and the inner end of the traction steel cable is fixedly connected to the lower end of the contact cone. The contact cone descends by contacting the top wall of the roadway, causing the protective display panel to rotate upward. Moreover, the rotated protective display panel is connected to the extension crossbeam via a diagonal strut installed with bolts.

[0015] Preferably, the protective mechanism includes a telescopic link, with one end of the telescopic link installed on the inner wall of the adapter display panel away from the protective display panel, and the other end of the telescopic link installed on the top of the extension column, thereby positioning the rotating and sliding adapter display panel through the telescopic link.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This temporary safety support frame for coal mine roadways allows for height and width adjustment through the extension columns and extension crossbeams above the support columns. Simultaneously, the lowering of the locking arc plate locks the moving wheel assembly, and the protective and adapting panels protect the roof of the coal mine roadway, thus improving the safety of support within the coal mine roadway. The specific details are as follows: 1. The movable wheel set assists in the movement of the support column and other components inside the coal mine roadway. At the same time, the lifting screw inside the extended column rotates, and the transmission bracket connected to it by the thread is limited by the support column, thereby driving the extended column and extended cross frame to move upward, adapting to coal mine roadways of different specifications.

[0017] Furthermore, the adjusting screw in the right-side extension crossbeam rotates, causing the left-side threaded extension crossbeam, extension column, and support column to slide, thereby adjusting and adapting according to the required support width, thus preventing the support column and extension column from obstructing passage inside the coal mine roadway.

[0018] 2. The extension column drives the lifting screw to rise. After the magnetic attraction component at its bottom increases its range, the limiting slide plate drives the locking arc plate to fall through the return spring. The locking arc plate then engages with the outer wall of the moving wheel assembly, thereby locking the support column and preventing displacement or misalignment during the support process.

[0019] Furthermore, after the extended column is retracted and lowered, the magnetic suction component at the bottom of the lifting screw drives the limiting slide plate to rise, so that the locking arc plate and the moving wheel set can be unlocked. This allows the support column to be moved and adjusted inside the coal mine roadway. At the same time, for the moving wheel set to be unlocked, the extended column needs to be fully lowered and retracted to avoid additional height movement and adjustment inside the suitable coal mine roadway, thus improving the safety of the support operation.

[0020] 3. The extension crossbeam rises, causing the contact cone above the protective crossbeam to contact and press against the roof of the coal mine roadway. After the contact cone descends, the traction cable is released, allowing the protective display plate connected by the torsion spring to rotate upwards and be supported by the bolted diagonal struts so that it fits against the roof of the coal mine roadway, thereby preventing sand and gravel from falling from the roof and hitting the workers due to the vibration generated by mining operations.

[0021] Furthermore, the adapter panel is connected to the extension column via the telescopic connecting rod at the outer end. During the process of the extension crossbeams on the left and right sides driving the extension column to adjust the width, the adapter panel can slide inside the protective panel. By adapting the protective panel and the adapter panel to the entire support range, the safety of the support inside the coal mine roadway is improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the initial state structure of the protective display panel and the adapter display panel of the present invention; Figure 3 This is a schematic diagram of the initial state structure of the limiting slide plate of the present invention; Figure 4 This is a schematic cross-sectional view of the support column and extension column of the present invention. Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the structure of the limiting slide after it has descended according to the present invention; Figure 8 This is a schematic diagram of the anti-detachment bracket installation structure of the present invention; Figure 9This is a schematic diagram of the structure of the present invention after the truncated cone descends; Figure 10 This is a schematic diagram of the installation structure of the protective display panel and the adapter display panel of the present invention; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point C; Figure 12 This is a three-dimensional structural schematic diagram of the locking arc plate of the present invention.

[0023] In the diagram: 1. Support column; 2. Wheel set bracket; 3. Extension column; 4. Extension crossbeam; 5. Anti-detachment frame; 6. Protective display panel; 7. Adaptive display panel; 8. Lifting screw; 9. Transmission bracket; 10. Limiting slide plate; 11. Return spring; 12. Locking arc plate; 13. Magnetic suction assembly; 14. Adjusting screw; 15. Diagonal connecting rod; 16. Protective crossbeam; 17. Abutment cone; 18. Abutment spring; 19. Traction cable; 20. Telescopic connecting rod; 21. Moving wheel set; 22. Diagonal support rod. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-12 The present invention provides the following technical solution: Example 1: To address the problems existing in the use of support frames in coal mine roadways, this example discloses the following technical solution: a temporary safety support frame for coal mine roadways, comprising support columns 1 symmetrically distributed on the left and right sides, an adjustment mechanism at the upper end of the support column 1, and the adjustment mechanism including an extension column 3. The extension column 3 slidably passes through the upper end of the support column 1, and the upper end of the extension column 3 is rotatably connected to the upper end of the lifting screw 8 through a bearing, and the lower end of the lifting screw 8 is threadedly connected to the upper end of the transmission bracket 9, and the bottom end of the transmission bracket 9 is fixedly installed at the lower end of the support column 1.

[0026] like Figures 4-5As shown, when performing support operations for coal mine roadways of different specifications, the servo motor installed at the top of the extension column 3 operates, driving the lifting screw 8 inside the extension column 3 to rotate through its shaft end. The transmission bracket 9, which is threadedly connected to the lifting screw 8, is locked and limited by the support column 1. Then, the rotating lifting screw 8 drives the extension column 3 to slide upward, thereby changing the overall support height to adapt to coal mine roadways of different specifications.

[0027] An extension crossbeam 4 is fixedly installed at the top of the extension column 3. The extension crossbeams 4 are arranged in pairs and are nested together in a manner that is identical in shape and opposite in direction. An anti-detachment bracket 5 is fixedly installed on the outer side of the inner end of the extension crossbeam 4. The adjustment mechanism includes an adjustment screw 14 that is rotatably installed inside the right extension crossbeam 4 via a bearing. The adjustment screw 14 is threaded through and connected to the inner end of the left extension crossbeam 4. The left and right extension crossbeams 4 are connected to each other through the external anti-detachment bracket 5. An oblique connecting rod 15 is fixedly installed between the bottom surface of the extension crossbeam 4 and the extension column 3.

[0028] like Figure 8 As shown, the servo motor installed inside the right-side extended crossbeam 4 operates, driving the adjusting screw 14 inside the right-side extended crossbeam 4 to rotate. The left-side extended crossbeam 4, which is threadedly connected to the adjusting screw 14, is limited between itself and the right-side extended crossbeam 4 by the anti-detachment bracket 5. Then, the rotation of the adjusting screw 14 drives the left-side extended crossbeam 4, the extended column 3, and the support column 1 to move, thereby adjusting and adapting according to the required support width, so as to avoid the support column 1 and the extended column 3 from obstructing the passage inside the coal mine roadway.

[0029] Example 2: In order to solve the problems existing in the use of the support frame in the existing coal mine roadway, this example discloses the following technical solution: a wheel bracket 2 is fixedly installed at the bottom end of the support column 1, and a movable wheel 21 is rotatably arranged inside the wheel bracket 2; the adjustment mechanism includes a limiting slide plate 10, and the middle part of the limiting slide plate 10 is slidably disposed inside the lower end of the support column 1, and the limiting slide plate 10 and the support column 1 are connected to each other by a return spring 11, and locking arc plates 12 are fixedly arranged on both the front and rear sides of the bottom of the limiting slide plate 10.

[0030] The adjusting mechanism includes locking arc plates 12 distributed on the front and rear sides of the upper end of the wheel set bracket 2. The upper end of the movable wheel set 21 passes through the upper exterior of the wheel set bracket 2 and is correspondingly distributed with the locking arc plates 12. Magnetic suction components 13 are provided at the center of the top surface of the limiting slide plate 10 and the bottom end of the lifting screw 8. In the initial state, the limiting slide plate 10 is in a raised state. The limiting slide plate 10 is raised by the magnetic attraction of the magnetic suction component 13 and the lifting screw 8. After being raised, the locking arc plates 12 on the bottom surface cannot lock and clamp the movable wheel set 21. The magnetic attraction force of the magnetic suction component 13 is greater than the elastic force of the return spring 11. At the same time, after the magnetic suction components 13 move away from each other, the limiting slide plate 10 and the locking arc plates 12 lock and clamp the movable wheel set 21.

[0031] like Figure 4 , Figures 6-7 , Figure 12 As shown, the lifting screw 8 inside the support column 1 simultaneously drives the extension column 3 when it rises. The bottom end of the lifting screw 8 and the magnetic attraction component 13 on the bottom surface of the limiting slide plate 10 move away from each other, so that the magnetic attraction force is less than the traction force of the return spring 11. Then, the return spring 11 drives the limiting slide plate 10 and the locking arc plate 12 to slide downward and fit against the top surface of the wheel set bracket 2. At the same time, the protrusion on the bottom surface of the locking arc plate 12 engages with the groove on the surface of the moving wheel set 21 to limit the support operation of the support column 1 and prevent displacement and slippage during vibration.

[0032] Furthermore, when the support column 1 and the extension column 3 are disassembled, the lifting screw 8 drives the extension column 3 to descend. After descending to the correct position, the magnetic attraction force of the magnetic attraction component 13 is greater than the traction force of the return spring 11. This allows the limit slide plate 10 and the locking arc plate 12 to be attracted and moved upwards through the magnetic attraction component 13, thereby unlocking the moving wheel set 21. This facilitates movement and adjustment within the coal mine roadway. At the same time, unlocking the moving wheel set 21 requires the extension column 3 to be fully lowered and retracted to avoid additional height movement and adjustment within the suitable coal mine roadway, thus improving the safety of the support operation.

[0033] Example 3: In order to solve the problems existing in the use of the support frame in the existing coal mine roadway, this example discloses the following technical solution: the upper end of the support column 1 is provided with a protective mechanism, and the protective mechanism includes a protective display plate 6, and an adapter display plate 7 is slidably arranged inside the protective display plate 6; the protective mechanism includes a protective crossbeam 16, and the protective crossbeam 16 is fixedly installed on the top surface of the left and right side extension crossbeams 4, and an abutment cone 17 is slidably arranged on the top surface of the protective crossbeam 16, and the bottom end of the abutment cone 17 is slidably arranged inside the protective crossbeam 16 through an abutment spring 18.

[0034] The protective mechanism includes a protective display plate 6, the upper end of which is rotatably mounted on the outside of the protective crossbeam 16 via a torsion spring. The bottom surface of the protective display plate 6 is fixedly connected to the outer end of the traction cable 19, and the inner end of the traction cable 19 is fixedly connected to the lower end of the contact cone 17. The contact cone 17 descends by contacting the top wall of the tunnel, causing the protective display plate 6 to rotate upward. The rotated protective display plate 6 is connected to the extended crossbeam 4 by a bolted inclined support rod 22. The protective mechanism includes a telescopic link 20, one end of which is mounted on the inner wall of the adapter display plate 7 away from the protective display plate 6, and the other end of which is mounted on the top of the extended column 3. The telescopic link 20 is used to position the rotating and sliding adapter display plate 7.

[0035] like Figures 9-11As shown, the extended column 3 drives the extended crossbeam 4 to move upward for support operations. The contact cone 17 above the protective crossbeam 16 on the top surface of the extended crossbeam 4 contacts the roof of the coal mine roadway. During the continuous upward movement, the contact cone 17 slides downward due to pressure from the roof of the coal mine roadway. After the contact cone 17 descends, the traction cable 19 at its bottom is released. (After the lower end of the contact cone 17 slides downward, the bottom contact spring 18 is first stretched, making the contact spring 18 extended. Then, as the lower end of the contact cone 17 descends, the distance between it and the top surface of the extended crossbeam 4 is shortened.) This causes the traction cable 19, which is fixedly installed at the lower end of the contact cone 17 and passes above the extension crossbeam 4, to shorten its vertical distance and release one end connected to the protective display plate 6. After the movement, the traction cable 19 no longer limits the outer protective display plate 6, causing the torsion spring-connected protective display plate 6 to rotate upwards, and simultaneously rotating its internal adapter display plate 7 into a horizontal state. (The torsion spring connecting the protective display plate 6 and the extension crossbeam 4 is initially tensioned, and after the protective display plate 6 is no longer limited by the traction cable 19, the tension of the torsion spring is released, thereby driving the protective display plate 6...) The protective panels 6 and 7 are rotated to form a parallel state with the roof of the coal mine roadway. The rotated protective panels 6 and 7 are locked together by bolted diagonal braces 22, thus shielding against falling rocks from the roof and preventing the protective panels 6, connected by torsion springs, from flipping upon impact (they make substantial contact with the roadway roof via the contact cone 17). The symmetrically distributed protective panels 6 and matching panels 7 rotate to a lateral state, forming a range of protection within the roadway and bearing the impact of falling rocks and dust, preventing them from directly hitting workers. This prevents... The vibrations generated by the mining operation caused sand and gravel blocks from the top wall to fall and hit the workers. (When the extended crossbeam 4 drives the contact cone 17 to slide downwards, the contact cone 17, which is not compressed, is released by the contact spring 18 at the bottom, causing the contact cone 17 to move upwards. At the same time, the traction cable 19, which is fixedly connected to the bottom of the contact cone 17, is driven to move upwards. The other end of the traction cable 19 drives the fixedly connected protective display plate 6 to flip downwards so as to return to the vertical state and simultaneously drive the torsion spring to restore the torque force for the next release operation.)

[0036] Furthermore, one end of the adapter panel 7 is slidably installed inside the protective panel 6, and the other end is connected to the extension column 3 on the other side through the telescopic connecting rod 20. Thus, during the process of the extension crossbeams 4 on the left and right sides driving the extension column 3 to adjust the width, the adapter panel 7 can be driven to slide inside the protective panel 6. By adapting the protective panel 6 and the adapter panel 7 to the entire support range, the safety of the support inside the coal mine roadway is improved.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A temporary safety support frame for a coal mine roadway, comprising support columns (1) symmetrically distributed on the left and right, and a wheel set support (2) fixedly installed at the bottom of the support columns (1), wherein the wheel set support (2) is provided with a movable wheel set (21) for rotation. Its features are, Also includes: The upper end of the support column (1) is provided with an adjustment mechanism, and the adjustment mechanism includes an extension column (3), and an extension crossbar (4) is fixedly installed at the top of the extension column (3). Among them, the extension crossbars (4) are in pairs and are connected to each other in the same shape but opposite directions. The outer side of the inner end of the extension crossbars (4) is fixed with an anti-detachment bracket (5). The upper end of the support column (1) is provided with a protective mechanism, and the protective mechanism includes a protective display panel (6), and an adapter display panel (7) is slidably arranged inside the protective display panel (6).

2. The temporary safety support frame for coal mine roadways according to claim 1, characterized in that: The adjustment mechanism includes an extension column (3) that slides through the upper end of the support column (1), and the upper end of the extension column (3) is rotatably connected to the upper end of the lifting screw (8) through a bearing. The lower end of the lifting screw (8) is threaded through and connected to the upper end of the transmission bracket (9), and the bottom end of the transmission bracket (9) is fixedly installed at the lower end of the support column (1).

3. The temporary safety support frame for coal mine roadways according to claim 1, characterized in that: The adjustment mechanism includes a limiting slide plate (10), and the middle part of the limiting slide plate (10) is slidably disposed inside the lower end of the support column (1). The limiting slide plate (10) and the support column (1) are connected to each other by a reset spring (11). Locking arc plates (12) are fixedly disposed on both the front and rear sides of the bottom of the limiting slide plate (10).

4. The temporary safety support frame for coal mine roadways according to claim 3, characterized in that: The adjustment mechanism includes locking arc plates (12) distributed on the front and rear sides of the upper end of the wheel set bracket (2). The upper end of the moving wheel set (21) passes through the upper outside of the wheel set bracket (2) and is distributed correspondingly with the locking arc plates (12). A magnetic suction component (13) is provided at the middle of the top surface of the limiting slide plate (10) and the bottom end of the lifting screw (8).

5. The temporary safety support frame for coal mine roadways according to claim 4, characterized in that: The limiting slide plate (10) included in the adjustment mechanism is initially close to the lifting screw (8) through the magnetic attraction component (13), and locks the moving wheel set (21) without the locking arc plate (12) on the bottom surface. The magnetic attraction force of the magnetic attraction component (13) is greater than the elastic force of the return spring (11). At the same time, after the magnetic attraction components (13) move away from each other, the limiting slide plate (10) and the locking arc plate (12) lock the moving wheel set (21).

6. The temporary safety support frame for coal mine roadways according to claim 1, characterized in that: The adjustment mechanism includes an adjustment screw (14) that is rotatably mounted inside the right extension cross frame (4) via a bearing, and the adjustment screw (14) is threaded through and connected to the inner end of the left extension cross frame (4). The left and right extension cross frames (4) are connected to each other by an external anti-detachment bracket (5). An oblique connecting rod (15) is fixedly installed between the bottom surface of the extension cross frame (4) and the extension column (3).

7. The temporary safety support frame for coal mine roadways according to claim 1, characterized in that: The protective mechanism includes a protective crossbeam (16), which is fixedly installed on the top surface of the left and right extended crossbeams (4). The top surface of the protective crossbeam (16) is slidably provided with an abutting cone (17), and the bottom end of the abutting cone (17) is slidably provided inside the protective crossbeam (16) by an abutting spring (18).

8. The temporary safety support frame for coal mine roadways according to claim 7, characterized in that: The upper end of the protective display plate (6) included in the protective mechanism is rotatably installed on the outside of the protective crossbeam (16) by a torsion spring, and the bottom surface of the protective display plate (6) is fixedly connected to the outer end of the traction cable (19), and the inner end of the traction cable (19) is fixedly connected to the lower end of the contact cone (17). The contact cone (17) descends by contacting the top wall of the roadway, causing the protective display plate (6) to rotate upward. The rotated protective display plate (6) is connected to the extension crossbeam (4) by a bolted inclined support rod (22).

9. The temporary safety support frame for coal mine roadways according to claim 8, characterized in that: The protective mechanism includes a telescopic link (20), one end of which is installed on the inner wall of the adapter panel (7) away from the protective panel (6), and the other end of which is installed on the top of the extension column (3). The adapter panel (7) that is rotated and slidably adapted is positioned by the telescopic link (20).

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