Roof supporting frame for local scour prevention of roadway

Abstract

The utility model relates to a top plate supporting frame for local scour prevention of a roadway. In order to overcome the defects in the prior art, the top plate supporting frame for local scour prevention of the roadway comprises four stand columns and two cross beams, the four stand columns are each of a sleeve structure, hydraulic supporting columns are arranged in the four stand columns, caulking grooves are formed in the tops of the two cross beams, a plurality of energy absorption blocks and springs are arranged in the caulking grooves at intervals, and a scour prevention frame with the adjustable width is further arranged above the two cross beams. The width-adjustable anti-impact frame comprises a double-thread screw rod, a first bevel gear, a second bevel gear, two sliding beams and four sliding frames, the first bevel gear is fixed in the middle of the double-thread screw rod, the second bevel gear is meshed with the first bevel gear, the second bevel gear is coaxially fixed to a hand wheel through a short shaft, the hand wheel is rotated, and the two sliding beams and the four sliding frames are fixed through the short shaft. The four sliding frames can be driven to slide outwards or inwards through the double-thread screw. The top plate supporting frame for local scour prevention of the roadway is simple in structure, capable of effectively preventing scour and suitable for being used in the coal mine roadway needing local scour prevention supporting.

Description

Technical Field

[0001] The utility model relates to a roof support frame for local anti-collision of a tunnel. Background Art

[0002] Rock burst is one of the major disasters in coal mines. When rock burst occurs, tunnels or coal mining faces several to several hundred meters underground are instantly destroyed. A large amount of coal and rock are suddenly thrown out by the dynamic phenomenon, causing support damage, tunnel blockage, casualties, etc., resulting in serious economic losses. Tunnel in rock burst danger area must take strengthened support measures. Strengthening support can be achieved by setting up retractable sheds, portal supports, stack supports, self-moving supports, etc. Rigid support is strictly prohibited. Support design should be carried out according to the danger of rock burst. Impact-resistant anchor rods (anchor cables), retractable supports and high-strength, impact-resistant tunnel hydraulic supports can be used to improve the tunnel's impact resistance.

[0003] The Chinese utility model patent with announcement number CN 217233549 U, announced on August 19, 2022, discloses a coal mine tunnel support device, including a roof, the roof including a first L-shaped plate and a second L-shaped plate, the bottom inner wall of the first L-shaped plate and the top inner wall of the second L-shaped plate are in movable contact, the top of the first L-shaped plate and the top of the second L-shaped plate are located in the same plane, a movable through hole is opened on the left side of the first L-shaped plate, a first drive motor is fixedly installed in the movable through hole, a first screw is fixedly connected to the right end of the output shaft of the first drive motor, an internal threaded sleeve is threaded on the first screw, and the right end of the internal threaded sleeve is fixedly connected to the right inner wall of the second L-shaped plate. The device uses the first L-shaped plate and the second L-shaped plate overlapped with each other as the roof, which is adjusted by the first screw and the internal threaded sleeve. The tunnel support device lacks anti-impact components and structures, has low impact resistance, and is easily damaged when facing sudden roof collapse and impact ground pressure.

[0004] The Chinese utility model patent with announcement number CN219101377U, announced on May 30, 2023, discloses a coal mine tunnel support mechanism, including a support member, the support member includes a telescopic rod, the outer end of the telescopic rod is provided with a protective assembly, the protective assembly includes abutment plates symmetrically fixedly connected to both sides of the telescopic rod, two abutment plates are provided on each side, a clamping rod is clamped between the two abutment plates, a fixing bolt is threadedly connected between the clamping rod and the abutment plate, a folding frame is fixedly connected to the outer end of the clamping rod, and a protective net is provided on the upper surface of the folding frame. The folding frame and the laying protective net of the coal mine tunnel support mechanism are too thin to resist the collapse of large pieces of coal and rock, and there is also a lack of anti-impact components and structures, and weak impact resistance. Summary of the invention

[0005] The technical problem to be solved by the utility model is how to overcome the above-mentioned defects of the prior art and provide a roof support frame for local anti-collision of tunnels.

[0006] In order to solve the above technical problems, the roof support frame for local anti-collision of the tunnel includes four columns and two cross beams. The four columns are arranged on both sides of the supporting tunnel, and the two cross beams are horizontally arranged in the supporting tunnel, and the two ends are respectively fixed on the top of the two columns. The characteristics are as follows: the four columns are all sleeve structures, and hydraulic pillars are arranged inside. The tops of the two cross beams are provided with embedded grooves, and a plurality of energy absorbing blocks and springs are arranged at intervals in the embedded grooves. A width-adjustable anti-collision frame is also provided above the two cross beams. The width-adjustable anti-collision frame includes a double-headed screw, a first bevel gear, a second bevel gear, two sliding beams and four sliding frames. Each sliding beam is made of channel steel with an opening facing outward, and two notches are opened on its top plate. The two ends of its inner wall are respectively provided with protrusions with trapezoidal vertical cross sections. The first bevel gear is fixed in the middle of the double-headed screw, and the second bevel gear is meshed with the first bevel gear. A short shaft is fixed at the center, and the short shaft is extended from The through hole of the middle side wall of the slide beam passes through, and a hand wheel is also provided at the outer end of the short shaft. The double-headed screws on both sides of the first bevel gear are respectively provided with positive and negative external threads. A downward vertical rod is provided on the slide frame, and the vertical rod extends into the slide beam through the notch, and a corresponding threaded through hole is also provided on it, and is sleeved on the positive and negative external threads through the threaded through hole. Optical axis ends are provided at both ends of the double-headed screw, and each optical axis end is sleeved with a bearing, and the bearing is installed on the bearing seat. A vertical groove with a trapezoidal cross section is provided on the side wall of each bearing seat, and is clamped on the protrusion with a trapezoidal vertical cross section through the groove. A connecting rod is provided between the adjacent ends of the two slide beams, and a connecting rod is provided between the adjacent slide frames on the same side of the two slide beams. The lower plates of the two slide beams of the width-adjustable anti-collision frame are respectively pressed on the energy absorption blocks and springs of the two cross beams. The hand wheel on the slide beam is rotated synchronously, and the four slide frames can be driven to slide outward or inward through the double-headed screw. The energy absorption block can be a rubber block or an elastic plastic block.

[0007] When in use, four columns are installed in the section to be protected from impact in the supporting tunnel, two beams are installed on the top of the four columns, and then a width-adjustable anti-impact frame is installed above the two beams, and the two sliding beams of the width-adjustable anti-impact frame are fixed on the two beams respectively, and then the height of each column is appropriately adjusted to make the width-adjustable anti-impact frame close to the tunnel roof, and then the handwheel on the sliding beam is synchronously turned, and the four slides are slid outward through the double-headed screw until the four slides touch the side wall of the supporting tunnel, and then the height of the four columns is raised again, so that the width-adjustable anti-impact frame can reliably contact the top, providing reliable support for the supporting tunnel roof. When large pieces of coal and rock collapse on the top of the tunnel, the impact caused by the collapse of large pieces of coal and rock is transferred to the energy-absorbing blocks and springs of the two beams through the adjustable anti-impact frame, which effectively prevents impact and provides effective support.

[0008] As an optimization, pallet racks are laid on the connecting rods at the adjacent ends of the sliding beam at equal distances, and protective nets are fixedly installed in the middle of the pallet racks. With this design, the protective nets receive the fallen coal and rocks, preventing them from falling further and effectively reducing the impact of their falling potential energy.

[0009] As an optimization, the slide is provided with a top anchor hole facing the top plate and a side anchor hole facing the side wall of the tunnel, and a foot plate is provided at the bottom of the column close to the side wall of the same side of the tunnel, and a through hole is opened on the foot plate. After the top plate support frame for local anti-collision of the tunnel of the utility model is installed in place, anchor cables or anchor rods can be driven into the top plate of the tunnel through the top anchor hole, anchor cables or anchor rods can be driven into the side wall of the tunnel through the side anchor hole, and expansion screws can be driven into the bottom plate of the tunnel through the through hole on the foot plate. Such a design is more solid.

[0010] The utility model has a simple structure for the roof support frame for local anti-collision of the tunnel, can effectively prevent collision, and is suitable for use in coal mine tunnels that require local anti-collision support. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following is a further description of the roof support frame for local anti-collision of the tunnel of the utility model in conjunction with the accompanying drawings:

[0012] Figure 1 It is a structural schematic diagram of the columns, beams and footboards of the first embodiment of the roof support frame for local anti-collision in the tunnel;

[0013] Figure 2 It is a schematic diagram of the structure of two slides in the first embodiment of the roof support frame for local anti-collision in the tunnel;

[0014] Figure 3 It is a schematic diagram of the position structure of the sliding beam, the first bevel gear, the double-headed screw and the bearing seats at both ends of the first embodiment of the roof support frame for local anti-collision in the tunnel;

[0015] Figure 4 yes Figure 2 The carriage shown is Figure 3 The assembly relationship diagram of the sliding beam and other components shown;

[0016] Figure 5 It is a schematic diagram of the structure of the width-adjustable anti-collision frame of the second implementation mode of the roof support frame for local anti-collision in the tunnel;

[0017] Figure 6 It is a structural schematic diagram of the second implementation method of the roof support frame for local anti-collision in the tunnel.

[0018] In the figure: 1 is a column, 2 is a cross beam, 3 is an energy absorbing block, 4 is a spring, 5 is a double-headed screw, 6 is a first bevel gear, 7 is a groove, 8 is a sliding beam, 81 is a top plate, 82 is a lower plate, 83 is a slide groove, 9 is a slide, 10 is a notch, 11 is a hydraulic support, 12 is a convex block, 13 is a short shaft, 14 is a hand wheel, 15 is a vertical rod, 16 is a parallel connecting plate, 17 is a threaded through hole, 18 is a bearing seat, 19 is a slot, 20 is a connecting rod, 21 is a card plate frame, 22 is a protective net, 23 is a top anchor hole, 24 is a side anchor hole, 25 is a foot plate, 26 is a through hole, 27 is a screw, and 28 is a sealing plate. DETAILED DESCRIPTION

[0019] Implementation method 1: Figure 1 As shown, the roof support frame for local anti-collision of the tunnel includes four columns 1 and two beams 2. The four columns 1 are arranged on both sides of the supporting tunnel, and the two beams 2 are horizontally arranged in the supporting tunnel, and their two ends are respectively fixed on the top of the two columns 1. The four columns 1 are all sleeve structures, and hydraulic struts 11 are arranged inside. Grooves 7 are opened on the tops of the two beams 2, and a plurality of energy absorbing blocks 3 and springs 4 are arranged at intervals in the grooves 7. A foot plate 25 is provided at the bottom of the column 1 close to the side wall on the same side of the supporting tunnel, and a through hole 26 is opened on the foot plate 25.

[0020] like Figure 2-4 As shown, an anti-collision frame with adjustable width is also provided above the two cross beams 2, and the anti-collision frame with adjustable width includes a double-headed screw 5, a first bevel gear 6, a second bevel gear (not shown in the figure), two slide beams 8 and four slide frames 9, each slide beam 8 is made of a channel steel with an opening facing outward, and two notches 10 are provided on its top plate 81, and protrusions 12 with trapezoidal vertical cross-sections are provided at both ends of its inner side wall, the first bevel gear 6 is fixed in the middle of the double-headed screw 5, the second bevel gear and the first bevel gear 6 are meshed with each other, and a short shaft 13 is fixed at the center, and the short shaft 13 passes through a through hole (not shown in the figure) in the middle side wall of the slide beam 8, and a hand wheel 14 is also provided at the outer end of the short shaft 13, and the double-headed screws 5 on both sides of the first bevel gear 6 are respectively provided with positive and negative external threads (i.e., the external thread is rotated clockwise Thread and counterclockwise rotating external thread), a downward vertical rod 15 is provided on the slide 9, and a parallel connecting plate 16 is also provided between the lower end of the vertical rod 15 and the slide 9, the vertical rod 15 between the parallel connecting plates 16 extends into the slide beam 8 through the notch 10, and a corresponding threaded through hole 17 is also opened on it, and is sleeved on the positive and negative external threads through the threaded through hole 17, and optical axis ends (not shown in the figure) are provided at both ends of the double-headed screw 5, each optical axis end is sleeved with a bearing (not shown in the figure), and the bearing is installed on the bearing seat 18, and each bearing seat 18 has a vertical cross-section trapezoidal groove 19 on the side wall, and is clamped on the protrusion 12 with a trapezoidal vertical cross-section through the groove 19, and a slide groove 83 is formed between the bearing seat 18 and the top plate 81 and the lower plate 82 of the slide beam 8.

[0021] The slide 9 is provided with a top anchor hole 23 facing the top plate of the matching tunnel and a side anchor hole 24 facing the side wall of the matching tunnel.

[0022] During installation, first take the double-headed screw 5 with the first bevel gear, align the threaded through holes 17 of the vertical rods of the two slides 9 and put them on the optical axis end of the double-headed screw 5, so that the parallel connecting plate 16 is located in the slide groove 83, as shown in FIG. Figure 4 shown.

[0023] A connecting rod 20 is provided between the adjacent ends of the two sliding beams 8. The lower plates 82 of the two sliding beams 8 of the width-adjustable anti-collision frame are respectively pressed on the energy-absorbing blocks 3 and the springs 4 of the two cross beams 2. The handwheel 14 on the sliding beam 8 is synchronously rotated, and the four slides 9 can be driven to slide outward or inward through the double-headed screw 5 to adjust the width of the width-adjustable anti-collision frame.

[0024] Implementation method 2: Figure 5 , 6 As shown, the connecting rods 20 at the adjacent ends of the sliding beams 8 are provided with equally spaced pallet frames 21, and the middle positions of the pallet frames 21 are fixedly installed with protective nets 22. A connecting rod 20 is provided between the adjacent slide frames 9 on the same side of the two sliding beams 8. A threaded blind hole (not shown in the figure) is provided on the outer wall of the bearing seat 18, and a sealing plate 28 is provided. Screw through holes are provided at corresponding positions of the sealing plate 28. The above-mentioned screw through holes correspond to the threaded blind holes one by one, and screws 27 are respectively passed through them to close the sliding beam 8 so that the double-headed screw 5 inside is not exposed. The remaining structure is as shown in the first embodiment and is omitted.

Claims

1. A roof support frame for local anti-collision in a tunnel, comprising four columns and two beams, wherein the four columns are arranged on both sides of the tunnel, and the two beams are arranged horizontally in the tunnel, and the two ends of the beams are respectively fixed on the tops of the two columns, and the characteristics are: The four columns are all sleeve structures with hydraulic struts inside. There are grooves on the tops of the two beams, and multiple energy-absorbing blocks and springs are arranged at intervals in the grooves. There is also an anti-collision frame with adjustable width above the two beams. The width-adjustable anti-collision frame includes a double-headed screw, a first bevel gear, a second bevel gear, two sliding beams and four sliding frames. Each sliding beam is made of channel steel with an opening facing outward, and there are two notches on the top plate. Both ends of the inner wall are respectively provided with protrusions with trapezoidal vertical cross-sections. The first bevel gear is fixed in the middle of the double-headed screw, and the second bevel gear is meshed with the first bevel gear. A short shaft is fixed in the center, which passes through the through hole in the middle side wall of the sliding beam. A handwheel is also provided at the outer end of the short shaft, and the double-headed screws on both sides of the first bevel gear are respectively provided with positive and negative outer The cam is provided with a plurality of threaded holes, each of which is provided with a plurality of bearings, and the bearings are installed on the bearing seats. A groove with a trapezoidal vertical cross-section is provided on the side wall of each bearing seat, and the groove is used to clamp the convex block with a trapezoidal vertical cross-section. A connecting rod is provided between the adjacent ends of the two sliding beams, and a connecting rod is provided between the adjacent slides on the same side of the two sliding beams. The lower plates of the two sliding beams of the width-adjustable anti-collision frame are respectively pressed on the energy absorbing blocks and springs of the two cross beams. By synchronously rotating the handwheel on the sliding beam, the four slides can be driven to slide outward or inward through the double-headed screw.

2. The roof support frame for local anti-collision in tunnel according to claim 1, characterized in that: The connecting rods at the adjacent ends of the sliding beam are provided with pallet racks which are distributed at equal distances, and the middle positions of the pallet racks are fixedly installed with protective nets.

3. The roof support frame for local anti-collision in tunnel according to claim 1, characterized in that: The slide frame is respectively provided with a top anchor hole facing the top plate and a side anchor hole facing the side wall of the laneway, and a foot plate is provided at the bottom of the column close to the side wall on the same side of the matching laneway, and a through hole is opened on the foot plate.

Images