Mine support anchor cable truss device

Abstract

The utility model provides a mine supporting anchor cable truss device which comprises a truss mechanism and an anchor cable mechanism. The truss mechanism comprises a supporting plate and hinge trays, the hinge trays are hinged to the two sides of the supporting plate, the width of the supporting plate and the width of the hinge trays are matched with the width of a roadway top plate, and each hinge tray is provided with an anchor cable mechanism. Through the arrangement of the size and the connection mode of the truss mechanism, the contact area of the truss mechanism and a top plate is large, prestress diffusion of the anchor cable mechanism is facilitated, the surface protection capacity is high, and the truss mechanism can adapt to top plates with different flatness.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine tunnel roof support, in particular to a mine support anchor cable truss device. Background Art

[0002] Rock burst is one of the most serious dynamic disasters in coal mining. As my country's coal mines are about to or have entered deep mining, the frequency, intensity and scope of rock burst are further increased, and the hazards caused are more serious. At present, rock burst accidents have become one of the main factors restricting high-yield, efficient and safe production of coal mines.

[0003] Deep tunnels have unique stress environments and complex occurrence conditions, which place higher demands on support equipment. Traditional single shed-type support cannot effectively support high-stress deep well tunnels. The combined support technology of shed-type and energy-absorbing materials has the disadvantages of slow construction speed, high cost, and difficulty in large-scale promotion. Ordinary anchor cable-anchor rod combined support for rock burst tunnels also has the problems of high support cost, high labor intensity, and slow construction speed. Therefore, by proposing the concept of truss-anchor cable combined support, the stress environment of the tunnel can be effectively optimized and the occurrence of rock burst in the tunnel can be prevented. Moreover, due to its simple construction process and reasonable material price, it has a strong prospect for promotion and application.

[0004] The existing truss structure is a rod-supported beam structure formed by welding, riveting or bolting. When supporting, the rod structure is in linear contact with the roof, the roof protection area is small, and the preload force cannot be fully converted, resulting in poor surface protection ability; the existing truss is a fixed structure, which means that the anchor cable can only be arranged vertically, that is, the tunnel roof is supported on a two-dimensional section, with a small degree of freedom, and it is impossible to achieve three-dimensional spatial support collaborative bearing and coordination with the surrounding rock. For vertical support under uneven roof conditions, the anchor cable clips are subjected to shear damage due to stress concentration, resulting in support failure. In severe cases, it may also cause wire breakage and injure people, which not only increases the tunnel repair cost, but also brings huge problems to mine safety production. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to improve the supporting effect of the anchor cable truss.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A mine support anchor cable truss device comprises a truss mechanism (1) and an anchor cable mechanism (2); the truss mechanism (1) comprises a support plate (11) and a hinge tray (12); both sides of the support plate (11) are hinged with hinge trays (12); the widths of the support plate (11) and the hinge tray (12) are both adapted to the width of a tunnel roof; and each hinge tray (12) is provided with an anchor cable mechanism (2).

[0008] Beneficial effects: By setting the size of the truss mechanism and the connection method, the contact area with the top plate is large, which is beneficial to the diffusion of the prestressed anchor mechanism, has strong surface protection ability, and can adapt to top plates of different flatness.

[0009] Furthermore, the support plate (11) and the hinge tray (12) are hingedly connected via a limit pin (13).

[0010] Beneficial effect: By realizing hinge connection through the limit pin, the anchor mechanism can be made perpendicular to the hinge tray, avoiding stress concentration and breakage failure of the lock of the anchor mechanism, which affects the support safety.

[0011] Furthermore, a first hollow fixing column (111) and a second hollow fixing column (112) are fixed to the upper and lower ends of the support plate (11) close to the hinge tray (12), and a third hollow fixing column (121) is fixed to the middle of the hinge tray (12) close to the support plate (11), and the third fixing column (121) is embedded between the first fixing column (111) and the second fixing column (112), and the limit pin (13) passes through the first fixing column (111), the third fixing column (121), and the second fixing column (112) in sequence for fixing.

[0012] Furthermore, an external thread is provided at the end of the limit pin (13), and the limit pin (13) passes through the internal threads provided in the first fixing column (111), the third fixing column (121) and the second fixing column (112) in sequence for fixation.

[0013] Furthermore, the support plate (11) is made of a steel plate, and the hinge tray (12) is made of stainless steel.

[0014] Furthermore, a fixing hole (122) is provided through the middle of each hinge tray (12), and the anchor cable mechanism (2) is respectively fixed in the fixing holes (122) of the hinge trays (12) on both sides.

[0015] Furthermore, the anchor cable mechanism (2) comprises an anchor cable (21), an anchoring agent (22), and a lock (23); an end of the anchor cable (21) close to the truss mechanism (1) is fixed in the fixing hole (122) by the lock (23); and an end of the anchor cable (21) away from the truss mechanism (1) is fixed in the tunnel roof by the anchoring agent (22).

[0016] Furthermore, the lock (23) comprises a locking ring (231) and a clip (232); the locking ring (231) is sleeved on the end of the anchor cable (21); a plurality of clips (232) are provided, and each clip (232) is embedded between the locking ring (231) and the anchor cable (21) along the periphery of the locking ring (231).

[0017] Furthermore, a side of the clip (232) close to the anchor cable (21) is provided with a transverse stripe (233).

[0018] Beneficial effect: By setting the transverse lines on the clip, the friction force is increased to improve the fixing strength.

[0019] Furthermore, three clips (232) are provided, and the whole assembly is in a truncated cone shape, and the angle of each part is 120°.

[0020] The advantages of the utility model are:

[0021] The utility model has a large contact area with the top plate by setting the size of the truss mechanism and the connection method, which is beneficial to the diffusion of the prestress of the anchor rod mechanism, has a strong surface protection ability, and can adapt to top plates with different flatness.

[0022] The utility model realizes hinge connection through the limit pin, so that the anchor rod mechanism can be perpendicular to the hinge tray, thereby preventing the lock of the anchor rod mechanism from breaking and failing due to stress concentration, which affects the support safety.

[0023] The utility model increases the friction force and improves the fixing strength by arranging the transverse lines on the clamping piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a working schematic diagram of a mine support anchor cable truss device according to a first embodiment of the utility model;

[0025] Figure 2 This is a three-dimensional diagram of a mine support anchor cable truss device according to a first embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of a truss mechanism in a mine support anchor cable truss device according to a first embodiment of the utility model;

[0027] Figure 4 This is an exploded view of a lock in a mine support anchor cable truss device according to a first embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the interior of a clip in a mine support anchor cable truss device according to the first embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1

[0031] like Figure 1 As shown, this embodiment provides a mine support anchor cable truss device, including a truss mechanism 1 and an anchor cable mechanism 2.

[0032] like Figure 1 , Figure 2 , Figure 3 As shown, the truss mechanism 1 includes a support plate 11, a hinge tray 12, and a limit pin 13. The hinge trays 12 are hinged on both sides of the support plate 11. The widths of the support plate 11 and the hinge tray 12 are adapted to the width of the tunnel roof. The contact area is large, which is conducive to the diffusion of prestressed stress of the anchor mechanism 2. The surface protection ability is strong and can adapt to roofs of different flatnesses. In this embodiment, the support plate 11 and the hinge tray 12 are hinged by the limit pin 13, which can make the anchor mechanism 2 perpendicular to the hinge tray 12, so as to avoid stress concentration and breakage failure of the lock 23 of the anchor mechanism 2, which affects the support safety. Specifically, the upper and lower ends of the support plate 11 close to the hinge tray 12 are fixed with a hollow first A fixing column 111, a second fixing column 112, and a hollow third fixing column 121 are fixed in the middle of the hinge tray 12 close to the support plate 11. The third fixing column 121 is embedded between the first fixing column 111 and the second fixing column 112. An external thread is provided at the end of the limit pin 13. The limit pin 13 passes through the internal threads in the first fixing column 111, the third fixing column 121 and the second fixing column 112 in sequence for fixing. The hinge tray 12 can rotate relative to the support plate 11 around the limit pin 13; the support plate 11 is a steel plate. In this embodiment, the support plate 11 is a solid beam, and the hinge tray 12 is made of stainless steel; a fixing hole 122 is provided through the middle of each hinge tray 12.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, two anchor mechanisms 2 are provided, which are respectively fixed in the fixing holes 122 of the hinge trays 12 on both sides; the anchor mechanism 2 includes an anchor 21, an anchoring agent 22, and a lock 23. The end of the anchor 21 close to the truss mechanism 1 is fixed in the fixing hole 122 by the lock 23, and the end of the anchor 21 away from the truss mechanism 1 is fixed in the tunnel roof by the anchor 22; the lock 23 includes a locking ring 231 and a clip 232. The locking ring 231 is sleeved on the end of the anchor 21, and a plurality of clips 232 are provided. Each clip 232 is embedded between the locking ring 231 and the anchor 21 along the periphery of the locking ring 231. In this embodiment, three clips 232 are provided, and the assembled whole is a truncated cone, and the angles of each part are 120°; a horizontal stripe 233 is provided on the side of the clip 232 close to the anchor 21 to increase friction to improve the fixing strength.

[0034] After the tunnel is excavated, anchor holes are pre-drilled inside the roof, and the truss mechanism 1 is pressed against the roof. One end of the anchor cable 21 brings the anchor agent 22 into the bottom of the anchor cable hole for fixation, and the other end of the anchor cable 21 passes through the fixing hole 122 on the hinge tray 12. The limit pin 13 is adjusted to make the support plate 11 and the hinge tray 12 close to the tunnel roof. Then the clip 232 is placed between the locking ring 231 and the anchor cable 21, and the exposed anchor cable 21 is pre-tensioned. The anchor cable 21 is fixed to the hinge tray 12 through the locking ring 231. The support plate 11 and the hinge tray 12 can hold the roof to support the roof.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mine support anchor cable truss device, characterized in that: It comprises a truss mechanism (1) and an anchor cable mechanism (2); The truss mechanism (1) comprises a support plate (11) and a hinge tray (12), the two sides of the support plate (11) are hinged with hinge trays (12), the widths of the support plate (11) and the hinge trays (12) are both adapted to the width of the tunnel roof, and each hinge tray (12) is provided with an anchor cable mechanism (2).

2. A mine support anchor cable truss device according to claim 1, characterized in that: The support plate (11) and the hinge tray (12) are hingedly connected via a limit pin (13).

3. A mine support anchor cable truss device according to claim 2, characterized in that: A hollow first fixing column (111) and a second fixing column (112) are fixed to the upper and lower ends of the support plate (11) close to the hinge tray (12); a hollow third fixing column (121) is fixed to the middle of the hinge tray (12) close to the support plate (11); the third fixing column (121) is embedded between the first fixing column (111) and the second fixing column (112); and the limit pin (13) passes through the first fixing column (111), the third fixing column (121), and the second fixing column (112) in sequence for fixing.

4. A mine support anchor cable truss device according to claim 3, characterized in that: The end of the limiting pin (13) is provided with an external thread, and the limiting pin (13) passes through the internal threads provided in the first fixing column (111), the third fixing column (121) and the second fixing column (112) in sequence for fixing.

5. The mine support anchor cable truss device according to claim 1, characterized in that: The support plate (11) is made of steel plate, and the hinge tray (12) is made of stainless steel.

6. A mine support anchor cable truss device according to claim 1, characterized in that: A fixing hole (122) is provided through the middle of each hinge tray (12), and the anchor cable mechanism (2) is respectively fixed in the fixing holes (122) of the hinge trays (12) at both sides.

7. A mine support anchor cable truss device according to claim 1, characterized in that: The anchor cable mechanism (2) comprises an anchor cable (21), an anchoring agent (22), and a lock (23); an end of the anchor cable (21) close to the truss mechanism (1) is fixed in a fixing hole (122) by means of the lock (23); and an end of the anchor cable (21) away from the truss mechanism (1) is fixed in a tunnel roof by means of the anchoring agent (22).

8. A mine support anchor cable truss device according to claim 7, characterized in that: The lock (23) comprises a lock ring (231) and a clip (232); the lock ring (231) is sleeved on the end of the anchor cable (21); a plurality of clips (232) are provided, and each clip (232) is embedded between the lock ring (231) and the anchor cable (21) along the periphery of the lock ring (231).

9. A mine support anchor cable truss device according to claim 8, characterized in that: A side of the clip (232) close to the anchor cable (21) is provided with a transverse stripe (233).

10. A mine support anchor cable truss device according to claim 8, characterized in that: The clamping pieces (232) are provided in three numbers, and the assembled whole is arranged in a truncated cone shape, and the angle of each part is 120°.

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