A tunnel support structure in gas-bearing rock section

Abstract

The present invention belongs to the technical field of tunnel construction, and specifically is a tunnel support structure in a gas-bearing rock section; by arranging a stand, a protective arch, a retaining rod and a folding retaining plate; the top surface of the tunnel is supported by the protective arch, thereby reducing the probability of collapse of the tunnel due to vibration; an interception net composed of retaining rods is used to block large pieces of gravel falling due to vibration, thereby reducing the probability of construction personnel being injured due to falling gravel; the folding retaining plate is used to block dust falling from the top of the tunnel, thereby reducing the impact of falling dust on the normal work of construction personnel; thereby not only improving the support strength, but also reducing the investment in manpower and material resources, and greatly improving the efficiency and progress of tunnel construction.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, in particular to a tunnel support structure in a gas-bearing rock section. Background Art

[0002] Tunnels are engineering structures buried in the ground. With the development and construction of highways and railways, tunnels are being built in more and more areas. The geological structure of tunnels in some gas-bearing rock sections is relatively complex, with a variety of soil structures interlaced. The vibration during excavation is more likely to cause debris to fall from the top of the tunnel, or even cause collapse. Therefore, when constructing tunnels in gas-bearing rock sections, it is necessary to set up a support structure inside the tunnel.

[0003] A Chinese patent with publication number CN108412549A discloses a tunnel support structure suitable for gas-bearing rock sections, which belongs to the field of coal mine pressure-equalizing ventilation technology, including a support arch for supporting the surrounding rock of the gas-bearing rock section of the tunnel; a pressure-yielding support mechanism for connecting the support arch with the surrounding rock, which is composed of a main anchor, a secondary anchor, a tray, an upper pressure-yielding member, and a lower pressure-yielding member; a monitoring device for monitoring surrounding rock stress, surrounding rock gas, and tunnel gas, which is composed of a first gas sensor, a first stress sensor, a second gas sensor, a second stress sensor, and a data collector. This invention can monitor the stress state and gas concentration of the tunnel surrounding rock and the tunnel support structure while supporting the tunnel, and is widely used in the field of mine or tunnel safety monitoring, with the advantages of simple structure, convenient operation, and timely detection.

[0004] In order to improve the safety of the tunnel, the top of the tunnel needs to be supported; full coverage support will consume a lot of manpower and material resources, greatly reducing the efficiency and progress of tunnel construction; and intermittent support will cause gravel to fall due to vibration, causing impact and harm to construction workers.

[0005] To this end, the present invention provides a tunnel support structure for a gas-bearing rock section. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: a gas-bearing rock section tunnel support structure described in the present invention comprises a stand, a protective arch, a retaining rod and a folding retaining plate; the stand is evenly arranged on both sides of the bottom surface of the tunnel, a protective arch is installed on the top between the stand on both sides, the protective arch is provided with a plurality of sliding holes, retaining rods are slidably installed inside the sliding holes of adjacent protective arches, a folding retaining plate is arranged between adjacent protective arches, and the retaining rod slides through the folding retaining plate; when working, the stand is evenly arranged on both sides of the interior of the tunnel, the protective arch is fixed to the top of the stand by bolts, so that the protective arch can fold the top surface of the tunnel. Support, pass the retaining rod through the sliding hole, drive the folding baffle to unfold, and connect and shield adjacent guard arches; support the top surface of the tunnel through the guard arch, reducing the probability of tunnel collapse due to vibration; use the interception net composed of retaining rods to block large pieces of gravel falling due to vibration, reducing the probability of construction workers being injured by falling gravel; use the folding baffle to block the dust falling from the top of the tunnel, reducing the impact of falling dust on the normal work of construction workers; thereby not only improving the support strength, but also reducing the investment in manpower and material resources, greatly improving the efficiency and progress of tunnel construction.

[0008] Preferably, the seat bolts are installed inside the guide rails, the guide rails are fixedly installed on both sides of the bottom surface of the tunnel, the guide rails on the same side are fixedly connected end to end, a slide groove is provided on the top of the seat, a column is slidably installed inside the slide groove, the top of the column is fixedly connected to the bottom end of the protective arch, an inner cavity is provided at the bottom of the slide groove, a threaded hole is provided at the bottom of the column, a screw rod is rotatably installed on the inner bottom surface of the inner cavity, the screw rod rotates through the top wall of the inner cavity, the outer ring of the screw rod is threadedly matched with the inner wall of the threaded hole, a worm gear is fixedly connected to the outer ring at the bottom of the screw rod, and one side of the inner cavity is rotatably installed A worm is installed, the rotating rod of the worm rotates and penetrates the side wall of the inner cavity, and the worm wheel is meshed with the worm; when working, by connecting the guide rails in series, slideways are formed on both sides of the interior of the tunnel for construction workers to move the seat, and after the seat is fixed inside the guide rail and the guard arch is fixed to the top of the column, an electric wrench is used to drive the worm to rotate, drive the worm wheel to rotate, and drive the lead screw to rotate, so that the column slides upward along the inner cavity, pushing the top surface of the guard arch upward to squeeze the top surface of the tunnel, thereby improving the support strength of the tunnel, and at the same time facilitating the support of different tunnels, thereby improving the applicability of the support structure.

[0009] Preferably, a plurality of balls are rotatably mounted on the bottom of the stand, a plurality of grooves are provided on the bottom surface of the guide rail, the outer wall of the ball is slidably matched with the inner wall of the groove, a plurality of No. 1 through holes are provided on both sides of the guide rail, a No. 2 through hole is provided on the bottom of the stand, the diameter of the No. 1 through hole is the same as the diameter of the No. 2 through hole, and the No. 1 through hole is horizontally aligned with the No. 2 through hole, the No. 1 through hole is vertically aligned with the groove, and long bolts are installed inside the No. 1 through hole and the No. 2 through hole; during operation, when the guide rail is laid, After the stand is placed inside the guide rail, the ball contacts the bottom surface of the guide rail. The rolling of the ball reduces the friction between the stand and the guide rail, making it easier for construction workers to push the stand along the guide rail. When the ball slides into the groove, the stand will have an obvious pause. At this time, through hole No. 1 is aligned and connected with through hole No. 2. Construction workers use long bolts to pass through through hole No. 1 and through hole No. 2 to fix the stand inside the guide rail. This makes it easier for construction workers to install and lay the support structure, improving their work efficiency.

[0010] Preferably, pressure plates are rotatably installed on both sides of the seat, the outer ring of the rotating shaft of the pressure plate is provided with a torsion spring, and a plurality of blind holes are opened on the side of the pressure plate away from the seat; during operation, when the ball slides into the groove and the seat needs to be moved, the construction personnel insert a pry bar into the blind hole, press the pry bar down, drive the pressure plate to rotate, so that the pressure plate contacts the top of both sides of the guide rail, and use the lever principle to tilt the seat upward, so that the ball is out of the groove, thereby facilitating the construction personnel to move the seat, thereby reducing the construction difficulty of the construction personnel.

[0011] Preferably, a plurality of rollers are rotatably mounted on the bottom surface of the pressure plate, and the outer walls of the rollers are slidably fitted with the top walls on both sides of the guide rail; during operation, when the pressure plate contacts the tops on both sides of the guide rail, the rollers contact the tops on both sides of the guide rail, and the friction between the pressure plate and the tops on both sides of the guide rail is reduced by the rolling of the rollers, thereby further reducing the friction resistance encountered by the stand when it moves.

[0012] Preferably, a plurality of reinforcing base plates are fixedly connected to the side of the guide rail close to the tunnel, and an anchor rod is slidably installed on the side of the reinforcing base plate away from the guide rail, and a plurality of frustums are fixedly connected to the outer ring of the anchor rod; during operation, the anchor rod is used to fix the reinforcing base plate to the bottom side of the tunnel, and the probability of the anchor rod detaching from the wall of the tunnel is reduced by blocking the frustum, thereby improving the fixing strength of the guide rail and further improving the overall stability of the support structure.

[0013] Preferably, a cable is fixed between the middle top surface of the reinforced bottom plate and the side bottom of the folding baffle; the two sides of the folding baffle are pulled and fixed by the arranged cable, thereby improving the overall strength of the folding baffle and improving the blocking effect against falling rocks and dust.

[0014] Preferably, one side of the folding baffle is fixedly connected to the side of the guard arch, and the other side of the folding baffle is fixedly connected with multiple sleeves, the inner ring of the sleeve is slidably matched with the outer ring of the baffle rod, and a receiving groove is opened on the top of the inner ring of the sleeve, and a clamping block is slidably installed inside the receiving groove, and a locking screw is threadedly installed on the top of the receiving groove, and the locking screw passes through the top wall of the receiving groove, and the bottom surface of the clamping block is slidably matched with the outer wall of the baffle rod; during operation, the baffle rod passes through the sliding hole, and the baffle rod passes through the folding baffle, and the construction personnel use a wrench to rotate the locking screw, push the locking screw into the interior of the storage groove, push the clamping block to squeeze the outer wall of the baffle rod, and fix the sleeve to the baffle rod, so that the baffle rod drives the folding baffle to unfold, and at the same time reduces the gap caused by the folding of the folding baffle.

[0015] Preferably, storage holes are provided on both sides of the top surface of the storage groove and the top surface of the clamping block, and tension springs are fixedly connected to the inside of the storage holes at the top and bottom; when working, the clamping block is pulled by the tension spring so that the clamping block is stored inside the storage groove, thereby reducing the influence of the clamping block on the blocking rod passing through the sleeve and improving the permeability of the sleeve.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The support structure of a tunnel in a gas-bearing rock section described in the present invention comprises a stand, a protective arch, a retaining rod and a folding baffle. The top surface of the tunnel is supported by the protective arch, thereby reducing the probability of collapse of the tunnel due to vibration. The interception net composed of the retaining rods is used to block large pieces of gravel falling due to vibration, thereby reducing the probability of injury to construction personnel due to falling gravel. The folding baffle is used to block dust falling from the top of the tunnel, thereby reducing the impact of falling dust on the normal work of construction personnel. Therefore, not only the support strength is improved, but also the investment in manpower and material resources is reduced, thereby greatly improving the efficiency and progress of tunnel construction.

[0018] 2. The present invention relates to a tunnel support structure for a gas-bearing rock section, which comprises guide rails, columns, screws, worm wheels and worms; the guide rails are connected in series on both sides of the interior of the tunnel to form a slideway for construction workers to move the seats. After the seats are fixed inside the guide rails, an electric wrench is used to drive the worm to rotate, which drives the worm wheel to rotate and drives the screw to rotate, so that the columns slide upward along the inner cavity, pushing the top surface of the guard arch upward to squeeze the top surface of the tunnel, thereby improving the support strength of the tunnel, and at the same time facilitating the support of different tunnels, thereby improving the application range of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0021] Figure 2 is a front view of the first embodiment of the present invention;

[0022] Figure 3 is a side view of the first embodiment of the present invention;

[0023] Figure 4 yes Figure 2 A partial enlarged view of the middle part;

[0024] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 6 yes Figure 3 A partial enlarged view of point C in the middle;

[0026] Figure 7 is a side view of a column according to a second embodiment of the present invention;

[0027] In the figure: 1. seat; 2. arch protection; 3. baffle rod; 4. folding baffle; 5. sliding hole; 6. guide rail; 7. slide groove; 8. column; 9. inner cavity; 10. threaded hole; 11. screw rod; 12. worm gear; 13. worm; 14. ball; 15. groove; 16. No. 1 through hole; 17. No. 2 through hole; 18. long bolt; 19. pressure plate; 20. blind hole; 21. roller; 22. reinforcing bottom plate; 23. anchor rod; 24. cone; 25. cable; 26. sleeve; 27. storage groove; 28. clamping block; 29. ​​locking screw; 30. storage hole; 31. tension spring; 32. arc baffle; 33. elastic push piece. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] Embodiment 1

[0030] like Figures 1 to 3As shown, a gas-bearing rock section tunnel support structure described in an embodiment of the present invention comprises a stand 1, a protective arch 2, a retaining rod 3 and a folding retaining plate 4; the stand 1 is evenly arranged on both sides of the bottom surface of the tunnel, and a protective arch 2 is installed on the top between the stand 1 on both sides, and the protective arch 2 is provided with a plurality of sliding holes 5, and retaining rods 3 are slidably installed inside the sliding holes 5 of adjacent protective arches 2, and a folding retaining plate 4 is arranged between adjacent protective arches 2, and the retaining rod 3 slides through the folding retaining plate 4; when working, the stand 1 is evenly arranged on both sides of the interior of the tunnel, and the protective arch 2 is fixed to the top of the stand 1 by bolts, so that the protective arch 2 can fold the top surface of the tunnel. Support, pass the blocking rod 3 through the sliding hole 5, drive the folding baffle 4 to unfold, and connect and shield the adjacent guard arches 2; support the top surface of the tunnel through the guard arch 2, thereby reducing the probability of tunnel collapse due to vibration; the interception net formed by the blocking rod 3 blocks large pieces of rubble falling due to vibration, thereby reducing the probability of construction workers being injured due to falling rubble; the folding baffle 4 is set to block the dust falling from the top of the tunnel, thereby reducing the impact of the falling dust on the normal work of the construction workers; thereby not only improving the support strength, but also reducing the investment in manpower and material resources, greatly improving the efficiency and progress of tunnel construction.

[0031] like Figure 2 , Figure 4 and Figure 5 As shown, the stand 1 is bolted and installed inside the guide rail 6, and the guide rail 6 is fixedly installed on both sides of the bottom surface of the tunnel, and the guide rails 6 on the same side are fixedly connected end to end, and the top of the stand 1 is provided with a slide groove 7, and a column 8 is slidably installed inside the slide groove 7, and the top of the column 8 is fixedly connected to the bottom end of the arch 2, and the bottom of the slide groove 7 is provided with an inner cavity 9, and the bottom of the column 8 is provided with a threaded hole 10, and a screw rod 11 is rotatably installed on the inner bottom surface of the inner cavity 9, and the screw rod 11 rotates and penetrates the top wall of the inner cavity 9, and the outer ring of the screw rod 11 is threadedly matched with the inner wall of the threaded hole 10, and the bottom outer ring of the screw rod 11 is fixedly connected with a worm gear 12, and one side of the inner cavity 9 A worm 13 is rotatably installed, and the rotating rod of the worm 13 rotates and penetrates the side wall of the inner cavity 9, and the worm wheel 12 is meshed with the worm 13; when working, by connecting the ends of the guide rails 6 in series, slideways are formed on both sides of the interior of the tunnel to facilitate construction workers to move the stand 1. After the stand 1 is fixed inside the guide rails 6 and the guard arch 2 is fixed to the top of the column 8, an electric wrench is used to drive the worm 13 to rotate, drive the worm wheel 12 to rotate, and drive the screw 11 to rotate, so that the column 8 slides upward along the inner cavity 9, and pushes the top surface of the guard arch 2 upward to squeeze the top surface of the tunnel, thereby improving the support strength of the tunnel, and at the same time facilitating the support of different tunnels, thereby improving the applicability of the support structure.

[0032] like Figures 4 to 5As shown, a plurality of balls 14 are rotatably mounted on the bottom of the stand 1, a plurality of grooves 15 are provided on the bottom surface of the guide rail 6, the outer wall of the balls 14 is slidably matched with the inner wall of the groove 15, a plurality of No. 1 through holes 16 are provided on both sides of the guide rail 6, a No. 2 through hole 17 is provided on the bottom of the stand 1, the diameter of the No. 1 through hole 16 is the same as the diameter of the No. 2 through hole 17, and the No. 1 through hole 16 is horizontally aligned with the No. 2 through hole 17, the No. 1 through hole 16 is vertically aligned with the groove 15, and the No. 1 through hole 16 and the No. 2 through hole 17 are installed with long bolts 18; during operation, when the guide rail 6 is laid, After completion, the stand 1 is placed inside the guide rail 6, so that the ball 14 contacts the bottom surface of the guide rail 6. The rolling of the ball 14 reduces the friction between the stand 1 and the guide rail 6, making it easier for construction workers to push the stand 1 to move along the guide rail 6. When the ball 14 slides into the groove 15, the stand 1 will have an obvious pause. At this time, the No. 1 through hole 16 is aligned and connected with the No. 2 through hole 17. The construction workers use long bolts 18 to pass through the No. 1 through hole 16 and the No. 2 through hole 17 to fix the stand 1 inside the guide rail 6; this makes it easier for construction workers to install and lay the support structure, thereby improving the work efficiency of construction workers.

[0033] like Figure 5 As shown, pressure plates 19 are rotatably installed on both sides of the stand 1, and the outer ring of the rotating shaft of the pressure plate 19 is provided with a torsion spring. A plurality of blind holes 20 are opened on the side of the pressure plate 19 away from the stand 1; during operation, when the ball 14 slides into the groove 15 and the stand 1 needs to be moved, the construction personnel insert a pry bar into the blind hole 20, press the pry bar down, and drive the pressure plate 19 to rotate, so that the pressure plate 19 contacts the top of both sides of the guide rail 6, and uses the principle of leverage to tilt the stand 1 upward, so that the ball 14 is separated from the groove 15, thereby facilitating the construction personnel to move the stand 1, thereby reducing the construction difficulty of the construction personnel.

[0034] like Figure 5 As shown, a plurality of rollers 21 are rotatably mounted on the bottom surface of the pressure plate 19, and the outer walls of the rollers 21 are slidably matched with the top walls on both sides of the guide rail 6; when working, when the pressure plate 19 contacts the tops on both sides of the guide rail 6, the rollers 21 contact the tops on both sides of the guide rail 6, and the rolling of the rollers 21 reduces the friction between the pressure plate 19 and the tops on both sides of the guide rail 6, thereby further reducing the friction resistance encountered by the stand 1 when moving.

[0035] like Figure 2 and Figure 4As shown, the guide rail 6 is fixedly connected with a plurality of reinforcing base plates 22 on one side close to the tunnel, and the reinforcing base plates 22 are slidably installed with anchor rods 23 on the side away from the guide rail 6, and the outer ring of the anchor rods 23 is fixedly connected with a plurality of frustums 24; when working, the anchor rods 23 are used to fix the reinforcing base plates 22 to the bottom side of the tunnel, and the probability of the anchor rods 23 detaching from the inside of the tunnel wall is reduced by blocking the frustums 24, thereby improving the fixing strength of the guide rail 6, and then improving the overall stability of the support structure.

[0036] like Figure 2 and Figure 4 As shown, a cable 25 is fixed between the middle top surface of the reinforced bottom plate 22 and the side bottom of the folding baffle 4; the two sides of the folding baffle 4 are pulled and fixed by the set cable 25, thereby improving the overall strength of the folding baffle 4 and improving the blocking effect against falling rocks and dust.

[0037] like Figure 6 As shown, one side of the folding baffle 4 is fixedly connected to the side of the guard arch 2, and the other side of the folding baffle 4 is fixedly connected with multiple sleeves 26, the inner circle of the sleeve 26 is slidably matched with the outer circle of the baffle rod 3, and the top of the inner circle of the sleeve 26 is provided with a receiving groove 27, and a clamping block 28 is slidably installed inside the receiving groove 27, and a locking screw 29 is threadedly installed on the top of the receiving groove 27, and the locking screw 29 passes through the top wall of the receiving groove 27, and the bottom surface of the clamping block 28 is slidably matched with the outer wall of the baffle rod 3; during operation, the baffle rod 3 passes through the sliding hole 5, and the baffle rod 3 passes through the folding baffle 4. The construction personnel use a wrench to rotate the locking screw 29, push the locking screw 29 into the inside of the receiving groove 27, push the clamping block 28 to squeeze the outer wall of the baffle rod 3, and fix the sleeve 26 with the baffle rod 3, so that the baffle rod 3 drives the folding baffle 4 to unfold, and at the same time reduces the gap caused by the folding of the folding baffle 4.

[0038] like Figure 6 As shown, receiving holes 30 are provided on both sides of the top surface of the receiving groove 27 and the top surface of the clamping block 28, and tension springs 31 are fixedly connected to the inside of the receiving holes 30 at the top and bottom; when working, the clamping block 28 is pulled by the tension spring 31 so that the clamping block 28 is stored in the inside of the receiving groove 27, thereby reducing the influence of the clamping block 28 on the blocking rod 3 passing through the sleeve 26 and improving the permeability of the sleeve 26.

[0039] Embodiment 2

[0040] like Figure 7As shown, compared with Example 1, another implementation of the present invention is: arc-shaped baffles 32 are fixedly connected to both sides of the bottom of the stand 1, and an elastic push piece 33 is fixedly connected to the bottom surface of the arc-shaped baffle 32, and the bottom end of the elastic push piece 33 slides with the inner bottom surface of the guide rail 6; when working, when the stand 1 slides along the guide rail 6, the elastic push piece 33 is pushed to slide in contact with the guide rail 6, and the elastic push piece 33 is bent by the friction force of the guide rail 6. When the bending elastic force of the elastic push piece 33 is greater than the resistance encountered by the elastic push piece 33, the elastic push piece 33 is reset to push the gravel inside the guide rail 6 away from the guide rail 6, thereby improving the smoothness of the sliding of the stand 1.

[0041] During operation: the guide rails 6 are connected in series on both sides of the tunnel to form a slideway for construction workers to move the stand 1. The anchor rods 23 are used to fix the reinforcing bottom plate 22 to the bottom side of the tunnel. The blocking of the cone 24 reduces the probability of the anchor rods 23 detaching from the wall of the tunnel, thereby improving the fixing strength of the guide rails 6.

[0042] After the stand 1 is placed inside the guide rail 6, the ball 14 contacts the bottom surface of the guide rail 6. The rolling of the ball 14 reduces the friction between the stand 1 and the guide rail 6, making it easier for the construction personnel to push the stand 1 to move along the guide rail 6. When the ball 14 slides into the groove 15, the stand 1 will have an obvious pause. At this time, the No. 1 through hole 16 and the No. 2 through hole 17 are aligned and connected. The construction personnel use long bolts 18 to pass through the No. 1 through hole 16 and the No. 2 through hole 17 to fix the stand 1 inside the guide rail 6; the guard arch 2 is fixed to the top of the stand 1 with bolts, so that the guard arch 2 supports the top surface of the tunnel, the baffle rod 3 is passed through the sliding hole 5, and the baffle rod 3 passes through the folding baffle plate 4. The construction personnel use a wrench to turn the locking screw 29, push the locking screw 29 into the inside of the storage groove 27, and push the clamping block 28 to squeeze the outer wall of the baffle rod 3, and fix the seat 26 with the baffle rod 3, so that the baffle rod 3 drives the folding baffle plate 4 to unfold;

[0043] An electric wrench is used to drive the worm 13 to rotate, drive the worm wheel 12 to rotate, and drive the screw 11 to rotate, so that the column 8 slides upward along the inner cavity 9, pushing the top surface of the arch 2 to squeeze the top surface of the tunnel upward; the top surface of the tunnel is supported by the arch 2, which reduces the probability of tunnel collapse due to vibration; the interception net composed of the baffle bars 3 blocks large pieces of rubble that fall due to vibration, and reduces the probability of construction workers being injured by falling rubble; the folding baffle 4 is set to block the dust falling from the top of the tunnel, reducing the impact of the falling dust on the normal work of the construction workers; thereby not only improving the support strength, but also reducing the investment in manpower and material resources, greatly improving the efficiency and progress of tunnel construction.

[0044] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tunnel support structure in a gas-bearing rock section, characterized in that: It comprises a stand (1), a protective arch (2), a blocking rod (3) and a folding baffle (4); the stand (1) is evenly arranged on both sides of the bottom surface of the tunnel, a protective arch (2) is installed on the top between the stand (1) on both sides, the protective arch (2) is provided with a plurality of sliding holes (5), a blocking rod (3) is slidably installed inside the sliding holes (5) of adjacent protective arches (2), a folding baffle (4) is arranged between adjacent protective arches (2), and the blocking rod (3) slides through the folding baffle (4); The stand (1) is bolted inside the guide rail (6), the guide rail (6) is fixedly installed on both sides of the bottom surface of the tunnel, and the guide rails (6) on the same side are fixedly connected end to end. A slide groove (7) is provided on the top of the stand (1), and a column (8) is slidably installed inside the slide groove (7). The top of the column (8) is fixedly connected to the bottom end of the guard arch (2), the bottom of the slide groove (7) is provided with an inner cavity (9), and the bottom of the column (8) is provided with a threaded hole (10). A screw (11) is rotatably mounted on the inner bottom surface of the inner cavity (9), the screw (11) rotatably penetrates the top wall of the inner cavity (9), the outer ring of the screw (11) is threadedly engaged with the inner wall of the threaded hole (10), a worm wheel (12) is fixedly connected to the bottom outer ring of the screw (11), a worm (13) is rotatably mounted on one side of the inner cavity (9), the rotating rod of the worm (13) rotatably penetrates the side wall of the inner cavity (9), and the worm wheel (12) is meshed with the worm (13); A plurality of balls (14) are rotatably mounted on the bottom of the stand (1), a plurality of grooves (15) are provided on the bottom surface of the guide rail (6), the outer wall of the balls (14) is slidably matched with the inner wall of the groove (15), a plurality of No. 1 through holes (16) are provided on both sides of the guide rail (6), a No. 2 through hole (17) is provided on the bottom of the stand (1), the diameter of the No. 1 through hole (16) is the same as the diameter of the No. 2 through hole (17), the No. 1 through hole (16) and the No. 2 through hole (17) are horizontally aligned, the No. 1 through hole (16) is vertically aligned with the groove (15), and long bolts (18) are installed inside the No. 1 through hole (16) and the No. 2 through hole (17); A pressure plate (19) is rotatably mounted on both sides of the stand (1), a torsion spring is arranged on the outer ring of the rotating shaft of the pressure plate (19), and a plurality of blind holes (20) are provided on the side of the pressure plate (19) away from the stand (1); A plurality of rollers (21) are rotatably mounted on the bottom surface of the pressure plate (19), and the outer walls of the rollers (21) are slidably engaged with the top walls on both sides of the guide rail (6).

2. A tunnel support structure for a gas-bearing rock section according to claim 1, characterized in that: A plurality of reinforcing bottom plates (22) are fixedly connected to the side of the guide rail (6) close to the tunnel, an anchor rod (23) is slidably mounted on the side of the reinforcing bottom plate (22) away from the guide rail (6), and a plurality of frustums (24) are fixedly connected to the outer ring of the anchor rod (23).

3. A tunnel support structure for a gas-bearing rock section according to claim 2, characterized in that: A pull cable (25) is fixedly connected between the middle top surface of the reinforced bottom plate (22) and the side bottom of the folding baffle (4).

4. The tunnel support structure for gas-bearing rock sections according to claim 1 is characterized in that: One side of the folding baffle (4) is fixedly connected to the side of the protective arch (2), and the other side of the folding baffle (4) is fixedly connected to a plurality of sleeves (26), the inner ring of the sleeve (26) is slidably matched with the outer ring of the baffle rod (3), the top of the inner ring of the sleeve (26) is provided with a receiving groove (27), a clamping block (28) is slidably installed inside the receiving groove (27), a locking screw (29) is threadedly installed on the top of the receiving groove (27), and the locking screw (29) passes through the top wall of the receiving groove (27), and the bottom surface of the clamping block (28) is slidably matched with the outer wall of the baffle rod (3).

5. A tunnel support structure for a gas-bearing rock section according to claim 4, characterized in that: Receiving holes (30) are provided on both sides of the top surface of the receiving groove (27) and the top surface of the clamping block (28), and tension springs (31) are fixedly connected inside the receiving holes (30) at the top and bottom.

6. The tunnel support structure in a gas-bearing rock section according to claim 1, characterized in that: Both sides of the bottom of the stand (1) are fixedly connected with arc-shaped baffles (32), the bottom surface of the arc-shaped baffles (32) is fixedly connected with an elastic push piece (33), and the bottom end of the elastic push piece (33) is slidably matched with the inner bottom surface of the guide rail (6).

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