Temporary support device for coal mine roadway

Abstract

The application provides a coal mine roadway temporary supporting device, which comprises a machine body, a support frame and a controller, a first rotating shaft is arranged between the support frame and the machine body, the first rotating shaft extends along the width direction of the machine body, the support frame has a first arm and a second arm, the first arm and the second arm are arranged in parallel, a first adjustable support is arranged between the first arm and the machine body, a second rotating shaft is arranged between the second arm and the machine body, the rotating axis of the second rotating shaft is perpendicular to the rotating axis of the first rotating shaft, a guard plate assembly is arranged on the support frame, and the controller is used for adjusting the extension length of the first adjustable support to drive the support frame to rotate relative to the machine body around the second rotating shaft, so that the guard plate assembly is adapted to the inclination angle of the roadway roof. The application can flexibly adapt the guard plate assembly to the roadway roof with different inclination angles, and provides a safer and more efficient temporary supporting solution for coal mining operations.

Description

Technical Field

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

[0002] In coal mining, temporary support devices can create safe zones in roadways, providing safety for operating equipment and personnel. Most temporary support devices are designed for horizontal or slightly inclined roofs. However, in deep-angle tunneling operations, the roof angle often changes. This change in roof angle alters the contact between the support points and the roadway roof, leading to uneven distribution of support force and an inability to provide stable support, posing serious safety risks. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a temporary support device for coal mine roadways. Through the coordinated operation of a first adjustable support member, a second rotating shaft, and the first rotating shaft, the protective plate assembly can flexibly adapt to roadway roofs with different inclination angles, providing a safer and more efficient temporary support solution for coal mining operations.

[0004] The temporary support device for coal mine roadways provided by the present invention includes a machine body, a support frame, and a controller. A first rotating shaft is provided between the support frame and the machine body, and the first rotating shaft extends along the width direction of the machine body. The support frame has a first arm and a second arm, which are arranged in parallel. A first adjustable support member is provided between the first arm and the machine body, and a second rotating shaft is provided between the second arm and the machine body. The rotation axis of the second rotating shaft is perpendicular to the rotation axis of the first rotating shaft. A guard plate assembly is provided on the support frame. The controller is used to adjust the extension length of the first adjustable support member to drive the support frame to rotate relative to the machine body around the second rotating shaft, so that the guard plate assembly adapts to the inclination angle of the roadway roof.

[0005] In summary, the temporary support device for coal mine roadways provided by the present invention, through the coordinated cooperation of the first adjustable support, the second rotating shaft, and the first rotating shaft, enables the protective plate assembly to flexibly adapt to roadway roofs with different inclination angles, providing a safer and more efficient temporary support solution for coal mining operations and effectively reducing safety risks during coal mining.

[0006] In some embodiments, both the first arm and the second arm include an arm-like body, a screw seat, and a screw rod. The screw seat has a threaded hole, and the screw rod is screwed into the threaded hole of the screw seat. One of the screw seat and the screw rod is connected to the machine body, and the other of the screw seat and the screw rod is connected to the arm-like body. The screw rod on the second arm is configured as a second rotating shaft.

[0007] In some embodiments, the first rotating shaft is provided in multiple ways, and the first rotating shaft is provided between the first arm and the body, and between the second arm and the body. The support frame is provided between the body and the body, and the controller is used to adjust the extension length of the second adjustable support so that the support rotates relative to the body around the first rotating shaft.

[0008] In some embodiments, the support frame includes a first subframe and a second subframe. One end of the first subframe is provided with a first arm and a second arm. The other end of the first subframe is provided with a third rotating shaft between it and the second subframe. The third rotating shaft is arranged parallel to the first rotating shaft. The two ends of the second adjustable support member are correspondingly connected to the second subframe and the machine body. A limiting member is provided between the first subframe and the second subframe to restrict rotation between the first subframe and the second subframe.

[0009] In some embodiments, the first adjustable support and the second adjustable support are configured as hydraulic struts or electric struts.

[0010] In some embodiments, the guard plate assembly further includes a sliding roof plate slidably connected to the support frame, and a first driver is provided between the support frame and the sliding roof plate. The first driver is used to drive the sliding roof plate to move relative to the support frame toward the roadway heading direction to form advanced temporary support.

[0011] In some embodiments, the guard plate assembly further includes a mounting plate, wherein the mounting plate and the sliding top plate are connected by a ball joint.

[0012] In some embodiments, an elastic element is provided between the mounting plate and the sliding top plate.

[0013] In some embodiments, the guard plate assembly further includes an outer sleeve, an inner sleeve, and a front guard plate. The outer sleeve is connected to the mounting plate, the inner sleeve is slidably connected to the outer sleeve, the front guard plate is hinged to the inner sleeve, a second driver is provided between the front guard plate and the inner sleeve, the second driver is used to drive the front guard plate to rotate relative to the inner sleeve, and a fourth driver is provided between the outer sleeve and the inner sleeve, the fourth driver is used to drive the inner sleeve to slide relative to the outer sleeve.

[0014] In some embodiments, two guard plate assemblies are provided, and the two guard plate assemblies are spaced apart from the sliding top plate. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the combination of the support leg and the first adjustable support member in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the protective plate assembly in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the connection between the mounting plate and the sliding roof plate in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0019] Figure label:

[0020] 10. Fuselage; 11. Support legs; 12. Connecting ears;

[0021] 21. Support frame; 211. First arm; 212. Second arm; 213. First pivot; 214. First adjustable support; 215. Second pivot; 2161. Arm-shaped body; 2162. Screw; 2163. Screw mount; 217. Second adjustable support; 218. First sub-frame; 219. Second sub-frame; 221. Third pivot; 222. Limiting element;

[0022] 25. Guard plate assembly; 251. Sliding top plate; 2511. Connecting ball; 252. First actuator; 253. Mounting plate; 2531. Ball socket; 254. Elastic element; 255. Outer sleeve; 256. Inner sleeve; 257. Front guard plate; 258. Second actuator. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] like Figures 1 to 4As shown, the present invention provides a temporary support device for coal mine roadways, which includes a body 10, a support frame 21, and a controller. A first rotating shaft 213 is provided between the support frame 21 and the body 10. The first rotating shaft 213 extends along the width direction of the body 10. The support frame 21 has a first arm 211 and a second arm 212, which are arranged in parallel. A first adjustable support member 214 is provided between the first arm 211 and the body 10. A second rotating shaft 215 is provided between the second arm 212 and the body 10. The rotation axis of the second rotating shaft 215 is perpendicular to the rotation axis of the first rotating shaft 213. A guard plate assembly 25 is provided on the support frame 21. The controller is used to adjust the extension length of the first adjustable support member 214 to drive the support frame 21 to rotate around the second rotating shaft 215, so that the guard plate assembly 25 adapts to the tilt angle of the roadway roof.

[0025] Specifically, the support frame 21 is connected to the machine body 10 via a first rotating shaft 213, which extends along the width direction of the machine body 10. The second arm 212 is connected to the machine body 10 via a second rotating shaft 215. That is, the first rotating shaft 213 connects the first arm 211 to the machine body 10, and the first rotating shaft 213 and the second rotating shaft 215 connect the second arm 212 to the machine body 10, allowing the support frame 21 to rotate flexibly in two mutually perpendicular directions (the length direction and the width direction of the tunnel). Regardless of whether the tunnel roof is tilted along the width or length direction of the machine body 10, the support frame 21 can adjust its position through corresponding rotation to ensure that the protective plate assembly 25 fits against the tunnel roof.

[0026] During actual operation, when the tilt of the roadway roof is detected, the controller can adjust the extension and retraction of the first adjustable support 214, causing the support frame 21 to rotate around the second pivot 215. This allows the protective plate assembly 25 to perfectly adapt to the tilt angle of the roadway roof, providing stable and reliable temporary support for the roadway. Furthermore, the parallel arrangement of the first arm 211 and the second arm 212 ensures the uniformity of force applied to the support frame 21, contributing to improved overall stability.

[0027] In summary, the temporary support device for coal mine roadways provided by the present invention, through the coordinated cooperation of the first adjustable support member 214, the second rotating shaft 215 and the first rotating shaft 213, enables the guard plate assembly 25 to flexibly adapt to roadway roofs with different inclination angles, providing a safer and more efficient temporary support solution for coal mining operations and effectively reducing safety risks in the coal mining process.

[0028] In this embodiment, the body 10 is provided with support legs 11, which are connected one-to-one with the first arm 211 and the second arm 212, providing a stable mounting base for the support frame 21. The support legs 11 have connecting ears 12, through which a first rotating shaft 213 movably passes and connects to the support frame 21.

[0029] In some embodiments, the first arm 211 and the second arm 212 each include an arm-shaped body 2161, a screw seat 2163 and a screw 2162. The screw seat 2163 has a threaded hole, and the screw 2162 is screwed into the threaded hole of the screw seat 2163. One of the screw seat 2163 and the screw 2162 is connected to the body 10, and the other of the screw seat 2163 and the screw 2162 is connected to the arm-shaped body 2161. The screw 2162 on the second arm 212 is configured as a second rotating shaft 215.

[0030] The screw 2162 can serve as a second pivot 215, allowing the support frame 21 to move relative to the fuselage 10 along the length of the fuselage 10. In actual use, the position of the connecting screw seat 2163 on the screw 2162 can be used to move the first sub-frame 218 and the second sub-frame 219 relative to the fuselage 10 along the length of the fuselage 10, thereby moving the guard plate assembly 25 toward the frontal direction and achieving support for the forward area.

[0031] Optionally, the screw seat 2163 is disposed on the arm-shaped body 2161, and the screw 2162 is correspondingly connected to the first rotating shaft 213 or the support leg 11. Of course, in some other embodiments, the screw 2162 may be disposed on the arm-shaped body 2161, and the screw seat 2163 may be correspondingly connected to the first rotating shaft 213 or the support leg 11.

[0032] In this embodiment, the first adjustable support 214 is connected between the screw 2162 of the first arm 211 and the support leg 11. When the first adjustable support 214 is extended, the first adjustable support 214 can drive the support frame 21 to rotate around the screw 2162 of the second arm 212 as the rotation axis (second rotating shaft 215) to adjust the tilt angle of the guard plate assembly 25 to match the tilt surface of the roadway roof.

[0033] In some embodiments, multiple first rotating shafts 213 are provided, one between the first arm 211 and the machine body 10, and another between the second arm 212 and the machine body 10. A second adjustable support member 217 is provided between the support frame 21 and the machine body 10. The controller is used to adjust the extension length of the second adjustable support member 217, so that the support member rotates relative to the machine body 10 around the first rotating shaft 213. That is, in the actual support process, the controller can also control the extension length of the second adjustable support member 217 to be consistent or linearly arranged, so that the support frame 21 rotates relative to the machine body 10 around the width direction of the machine body 10, thereby making the guard plate assembly 25 have different heights to adapt to the tunnel roof of different heights.

[0034] Furthermore, the first adjustable support member 214 and the second adjustable support member 217 are configured as hydraulic struts or electric struts.

[0035] In this embodiment, during the process of adjusting the support frame 21 to rotate around the second rotating shaft 215, the controller can combine and adjust the extension length of the first adjustable support member 214 and the second adjustable support member 217 to jointly adjust the rotation process of the support frame 21.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the support frame 21 includes a first sub-frame 218 and a second sub-frame 219. One end of the first sub-frame 218 is provided with a first arm 211 and a second arm 212. The other end of the first sub-frame 218 is provided with a third rotating shaft 221 between it and the second sub-frame 219. The third rotating shaft 221 is arranged parallel to the first rotating shaft 213. The two ends of the second adjustable support member 217 are correspondingly connected to the second sub-frame 219 and the body 10. A limiting member 222 is provided between the first sub-frame 218 and the second sub-frame 219. The limiting member 222 is used to restrict the rotation between the first sub-frame 218 and the second sub-frame 219.

[0037] Specifically, in actual roadway operations, the height of the roadway roof is not fixed but fluctuates significantly due to differences in geological structure, mining depth, and coal seam thickness. The first sub-frame 218 and the second sub-frame 219 in the second sub-frame 219 are connected by a third pivot 221, allowing for the selection of appropriate support structures when the roadway roof height varies.

[0038] For example, when the tunnel roof is low, the limiting member 222 can be released from the restriction on the first sub-frame 218 and the second sub-frame 219. At this time, the controller can adjust the extension length of the adjustable support member so that the second sub-frame 219 rotates relative to the first sub-frame 218 around the third rotating shaft 221. The first sub-frame 218 is fixed or moves relatively little relative to the machine body 10, so that the guard plate assembly 25 on the second sub-frame 219 has a lower height to accurately fit the tunnel roof.

[0039] When the tunnel roof is high, the limiting member 222 can limit the first sub-frame 218 and the second sub-frame 219 to form a rigid whole. At this time, when the controller adjusts the extension length of the adjustable support, the whole formed by the first sub-frame 218 and the second sub-frame 219 will rotate around the first pivot 213, thereby causing the guard plate assembly 25 to fit against the tunnel roof.

[0040] like Figure 3 and Figure 4 As shown, in some embodiments, the protective plate assembly 25 further includes a sliding roof plate 251, which is slidably connected to the support frame 21. A first driver 252 is provided between the support frame 21 and the sliding roof plate 251. The first driver 252 is used to drive the sliding roof plate 251 to move relative to the support frame 21 toward the roadway facing direction to form advanced temporary support, provide a safe working environment for the tunneling and mining equipment, and avoid damage to the equipment caused by roof collapse, sidewall spalling and other accidents.

[0041] Furthermore, the guard plate assembly 25 also includes a mounting plate 253, which is connected to the sliding roof plate 251 by a ball joint. The ball joint refers to the presence of a ball socket 2531 and a connecting ball 2511 on the mounting plate 253 and the sliding roof plate 251, respectively. The connecting ball 2511 can rotate omnidirectionally within the ball socket 2531, giving the mounting plate 253 three degrees of rotational freedom relative to the sliding roof plate 251. This allows for better adaptation to uneven surfaces and angle changes on the roadway roof, ensuring that other components on the guard plate assembly 25 maintain a suitable working angle at all times.

[0042] Optionally, the mounting plate 253 is provided with a ball socket 2531, and the sliding top plate 251 is provided with a connecting ball 2511. The ball socket 2531 is rotatably disposed in the connecting ball 2511 to realize the ball connection between the mounting plate 253 and the sliding top plate 251.

[0043] Furthermore, an elastic element 254 is provided between the mounting plate 253 and the sliding top plate 251. The elastic element 254 plays multiple important roles between the mounting plate 253 and the sliding top plate 251. First, the elastic element 254 can act as a buffer and shock absorber. During coal mine tunneling, the equipment is subjected to various vibrations and impacts, such as the tunneling vibration of the tunneling head. At this time, the elastic element 254 can absorb and dissipate these vibrations and impacts through its own elastic deformation, reducing the vibration transmitted to the guard plate assembly 25 and the entire equipment.

[0044] Secondly, the elastic element 254 can provide a certain preload. By adjusting the preload of the elastic element 254, the mounting plate 253 and the sliding top plate 251 can maintain appropriate contact pressure, ensuring that the guard plate assembly 25 will not loosen or shift due to vibration or external force during operation.

[0045] Furthermore, the elastic element 254 also has a certain self-adjusting capability. When the pressure or shape of the roadway top changes, the elastic element 254 can automatically adjust its elastic deformation according to the actual situation, so that the mounting plate 253 and the guard plate assembly 25 can always maintain good contact with the roadway top, improving the adaptability and working effect of the guard plate assembly 25.

[0046] In some embodiments, the guard plate assembly 25 further includes an outer sleeve 255, an inner sleeve 256, and a front guard plate 257. The outer sleeve 255 is connected to the mounting plate 253, the inner sleeve 256 is slidably connected to the outer sleeve 255, the front guard plate 257 is hinged to the inner sleeve 256, a second driver 258 is provided between the front guard plate 257 and the inner sleeve 256, the second driver 258 is used to drive the front guard plate 257 to rotate relative to the inner sleeve 256, and a fourth driver is provided between the outer sleeve 255 and the inner sleeve 256, the fourth driver is used to drive the inner sleeve to slide relative to the outer sleeve.

[0047] In this embodiment, one end of the outer sleeve 255 can be connected to the mounting plate 253 by welding, bolting, or other means to ensure that the two will not loosen due to equipment vibration or external forces. The front guard plate 257 can contact the coal mine roadway or extend towards the tunneling face to support the front of the equipment. The second actuator 258 can adjust the rotation angle of the front guard plate 257 according to actual operational needs, providing reliable protection for the equipment and personnel.

[0048] Optionally, the fourth actuator may be configured as a component such as a hydraulic cylinder or a linear motor.

[0049] Optionally, the first driver 252 and the second driver 258 can be configured as hydraulic cylinders, electric cylinders (trapezoidal screws, ball screws) or linear motors, etc.

[0050] Through research by the technical personnel of this invention, it has been discovered that this invention can achieve forward-probing temporary support by coordinating the sliding top plate 251, the outer sleeve 255 and the inner sleeve 256, the screw 2162 and the swivel joint 2163, thus achieving zero open roof in advance temporary support and providing 2×200kN initial support force. This effectively ensures the safety of workers and equipment and solves the problem that commercial temporary support (which can only provide 50kN initial support force) cannot truly cope with large-scale roof collapses.

[0051] Furthermore, two guard plate assemblies 25 are provided, spaced apart from the sliding roof plate 251 along the width direction of the machine body 10. In practical applications, the two guard plate assemblies 25 can support the roof on both sides of the roadway respectively, forming a comprehensive support system. For example, when the roadway is wide, a single guard plate assembly 25 may not be able to completely cover the entire roof, while the double guard plate assembly 25 can achieve comprehensive support for the roadway roof by reasonably adjusting the spacing and angle, effectively preventing local roof collapse.

[0052] Meanwhile, the two guard plate assemblies 25 can be adjusted independently according to the uneven stress on the roadway roof. When the roof pressure on one side of the roadway is greater, the guard plate assembly 25 on that side can adjust the rotation angle of the front guard plate 257 through the second actuator 258 to increase the support force; while the guard plate assembly 25 on the other side can be adjusted accordingly according to the actual situation to ensure the stability and reliability of the entire support system.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this invention, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A temporary support device for coal mine roadways, characterized in that, The device includes a fuselage (10), a support frame (21), and a controller. A first rotating shaft (213) is provided between the support frame (21) and the fuselage (10), extending along the width direction of the fuselage (10). The support frame (21) has a first arm (211) and a second arm (212), arranged parallel to each other. A first adjustable support member (214) is provided between the first arm (211) and the fuselage (10). A second rotating shaft (215) is provided between the arm (212) and the machine body (10). The rotation axis of the second rotating shaft (215) is perpendicular to the rotation axis of the first rotating shaft (213). A guard plate assembly (25) is provided on the support frame (21). The controller is used to adjust the extension length of the first adjustable support (214) to drive the support frame (21) to rotate relative to the machine body (10) around the second rotating shaft (215), so that the guard plate assembly (25) adapts to the tilt angle of the tunnel roof. The guard plate assembly (25) further includes a sliding top plate (251) and a mounting plate (253), wherein the mounting plate (253) and the sliding top plate (251) are connected by a ball joint.

2. The temporary support device for coal mine roadways according to claim 1, characterized in that, The first arm (211) and the second arm (212) each include an arm-shaped body (2161), a screw seat (2163) and a screw (2162). The screw seat (2163) has a threaded hole, and the screw (2162) is screwed into the threaded hole of the screw seat (2163). One of the screw seat (2163) and the screw (2162) is connected to the body (10), and the other of the screw seat (2163) and the screw (2162) is connected to the arm-shaped body (2161). The screw (2162) on the second arm (212) is set as a second rotating shaft (215).

3. The temporary support device for coal mine roadways according to claim 1, characterized in that, The first rotating shaft (213) is provided in multiple ways. The first rotating shaft (213) is provided between the first arm (211) and the body (10) and between the second arm (212) and the body (10). The second adjustable support (217) is provided between the support frame (21) and the body (10). The controller is used to adjust the extension length of the second adjustable support (217) so that the second adjustable support rotates relative to the body (10) around the first rotating shaft (213).

4. The temporary support device for coal mine roadways according to claim 3, characterized in that, The support frame (21) includes a first sub-frame (218) and a second sub-frame (219). One end of the first sub-frame (218) is provided with a first arm (211) and a second arm (212). The other end of the first sub-frame (218) and the second sub-frame (219) are provided with a third rotating shaft (221). The third rotating shaft (221) is arranged parallel to the first rotating shaft (213). The two ends of the second adjustable support member (217) are connected to the second sub-frame (219) and the body (10) respectively. A limiting member (222) is provided between the first sub-frame (218) and the second sub-frame (219). The limiting member (222) is used to restrict the rotation between the first sub-frame (218) and the second sub-frame (219).

5. The temporary support device for coal mine roadways according to claim 3, characterized in that, The first adjustable support (214) and the second adjustable support (217) are configured as hydraulic struts or electric struts.

6. The temporary support device for coal mine roadways according to claim 1, characterized in that, The sliding roof plate (251) is slidably connected to the support frame (21). A first driver (252) is provided between the support frame (21) and the sliding roof plate (251). The first driver (252) is used to drive the sliding roof plate (251) to move relative to the support frame (21) toward the roadway heading direction to form advanced temporary support.

7. The temporary support device for coal mine roadways according to claim 6, characterized in that, An elastic element (254) is provided between the mounting plate (253) and the sliding top plate (251).

8. The temporary support device for coal mine roadways according to claim 6, characterized in that, The guard plate assembly (25) further includes an outer sleeve (255), an inner sleeve (256), and a front guard plate (257). The outer sleeve (255) is connected to the mounting plate (253). The inner sleeve (256) is slidably connected to the outer sleeve (255). The front guard plate (257) is hinged to the inner sleeve (256). A second driver (258) is provided between the front guard plate (257) and the inner sleeve (256). The second driver (258) is used to drive the front guard plate (257) to rotate relative to the inner sleeve (256). A fourth driver is provided between the outer sleeve (255) and the inner sleeve (256). The fourth driver is used to drive the inner sleeve (256) to slide relative to the outer sleeve (255).

9. The temporary support device for coal mine roadways according to claim 6, characterized in that, Two guard plate assemblies (25) are provided, and the two guard plate assemblies (25) are spaced apart from each other on the sliding top plate (251).

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