A circulating movable tunnel support

Abstract

The present invention discloses a cyclically movable tunnel support, comprising a base, a top beam, and a retractable support column connected between the base and the top beam. The base is provided with the support columns at both ends in its length direction. The spacing formed by the support columns at both ends is greater than the width of the base and the top beam. After the support columns are retracted, the net height from the upper plane of the top beam to the lower plane of the base is less than the static air distance between the top beam and the base when the tunnel support is in a supporting state. The present invention solves the difficulty in moving the tunnel support caused by the small tunnel space, and enables the mobile support to move in the limited space formed by all the supports in the supporting state. In tunnels of the same size, the tunnel support can have a larger support area and a stronger support capacity, and will not cause repeated support to the tunnel top, and will not hinder the tunnel support from performing large cyclic displacement, thereby improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of mining safety technology, in particular to a cyclically movable tunnel support, which solves the problems of tunnel support and movement. Background Art

[0002] In mines that utilize underground mining, tunnels are a crucial component of the production system, serving multiple functions, including transportation, ventilation, and pedestrian access. Maintaining the safety and efficiency of tunnels is a crucial task for every mine. For mine tunnel support, the commonly used methods currently employed in the industry include anchor bolt and cable support, single-column and π-beam support, and tunnel advance support. With the increase in mine production capacity and the intensification of working face mining, the strength of tunnel support also needs to be continuously improved, leading to the increasing use of hydraulic tunnel supports. However, due to the limited cross-sectional dimensions of tunnels, the arrangement and movement of tunnel supports are significantly restricted. Typically, tunnel supports can only be moved sequentially, with each support being unloaded, moved, and then supported. This repeated support of the tunnel roof damages the roof and reduces the self-bearing capacity of the tunnel surrounding rock. Therefore, it is best to use a large-cycle movement method for tunnel supports, with the last support moved to the front, to avoid repeated support of the roof. However, in the transport tunnel of the working face, large equipment such as transfer machines and belt conveyors occupy a large space in the tunnel. There is not enough space between the bracket and the belt or transfer machine for the movement of the bracket, and the large circulation method cannot be realized, which limits the use of the tunnel bracket and becomes a support difficulty. Summary of the Invention

[0003] The present invention addresses the problem that in the prior art, the cross-sectional size of the tunnel is limited, the arrangement and movement of the tunnel support are greatly restricted, and the tunnel support is difficult to achieve large-circular movement in the tunnel. The present invention quickly achieves large-circular movement of the tunnel support without affecting the tunnel support strength of the tunnel working face, thereby solving the problem of tunnel support movement in narrow tunnels. To this end, the present invention provides a cyclically movable tunnel support.

[0004] The technical solutions adopted are as follows:

[0005] A circulating movable tunnel support comprises a base, a top beam and a retractable supporting column connected between the base and the top beam. The base is provided with the supporting columns at both ends in its length direction. The spacing formed by the supporting columns at both ends is greater than the width of the base and the top beam. After the supporting columns are retracted, the net height from the upper plane of the top beam to the lower plane of the base is less than the static air distance between the top beam and the base when the tunnel support is in the supporting state.

[0006] Preferably, one end of the base is provided with one supporting column, and the other end of the base is provided with two supporting columns arranged in parallel, and the upper end of each supporting column is fixedly connected to the top beam.

[0007] Furthermore, the end of the top beam located above the two supporting columns is also hinged with a first-level flip plate, and a first jack is provided below the first-level flip plate. The first jack drives the first-level flip plate to flip, so that when it flips upward to a horizontal state, the top beam extends in its length direction.

[0008] Furthermore, the flip end of the first flip plate is also hinged to a secondary flip plate, and the secondary flip plate is tightly hinged to the hinged end of the first flip plate. After the secondary flip plate flips along the end of the first flip plate, it can be flipped from an unfolded state with the first flip plate to a folded state with the first flip plate.

[0009] Furthermore, a side flip plate is provided on each of the two side surfaces of the base, the end of the side flip plate is hinged to the base, and the two are driven and connected by a second jack, which is used to drive the side flip plate to flip so that it can flip arbitrarily between a horizontal state and a vertical state; when the side flip plate flips to a horizontal state, its upper plane is flush with the upper plane of the base.

[0010] A side flip beam is provided on each side of the top beam. The end of the side flip beam is hinged to the top beam, and the two are driven and connected by a third jack, which is used to drive the side flip beam to flip so that it can flip arbitrarily between the horizontal and vertical states.

[0011] When the second jack and the third jack respectively drive the side flip plate and the side flip beam to flip to a flush state, the total width formed by the two side flip plates and the base is greater than or equal to the width of the support surface formed by the two side flip beams and the top beam.

[0012] Both ends of the base are further provided with base supports higher than the upper end surface of the base, and the lower part of the support column is placed in the base support to stabilize the support column.

[0013] The base support and the base are an integral structure.

[0014] The technical solution of the present invention has the following advantages:

[0015] A. The present invention sets support columns arranged at intervals in the length direction of the base, and the spacing formed by the support columns is larger than the minimum width dimension of the tunnel support; at the same time, the retracted support columns reduce the height of the entire top beam, and the net height of the retracted support is smaller than the static distance between the top beam and the base when it is in the supporting state. When the first tunnel support is moved to the rear of the tunnel support at the rear end, it is only necessary to retract the first tunnel support and then rotate it 90 degrees so that it passes through each tunnel support in the supporting state in turn and reaches the final installation position, thereby solving the problem of tunnel support movement caused by the small tunnel space. In tunnels of the same size, the tunnel support can have a larger support area, which does not hinder the tunnel support from performing large-cycle displacement, thereby improving work efficiency.

[0016] B. The present invention sets side flip plates on both sides of the base. The side flip plates can reduce the base gap between two adjacent tunnel supports. At the same time, side flip beams, first-level flip plates and second-level flip plates are added to the top beam, which increases the auxiliary support area, improves the support effect on the tunnel, and reduces the support density of the support.

[0017] C. The tunnel support adopts at least three supporting columns, which improves the support strength and makes the supporting force distribution more reasonable; at the same time, the width of the beam can be reduced structurally, and the three supporting columns form a three-point support, so that the support forms a stable support surface.

[0018] D. When the tunnel support moves in a large circle in the tunnel, the moving support is inside the support in a supporting state. The limited space formed inside the support can prevent the lateral overturning of the moving support and improve the safety of the support when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the tunnel support structure provided by the present invention;

[0021] Figure 2 A schematic structural diagram of another angle provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the arrangement of multiple tunnel supports provided by the present invention in a tunnel;

[0023] Figure 4 A schematic diagram of a tunnel support in a retracted state passing through multiple tunnel supports;

[0024] Figure 5 for Figure 4 Another perspective diagram.

[0025] Description of reference numerals:

[0026] 1-base; 2-top beam; 3-support column; 4-first flip plate; 5-first jack; 6-second flip plate; 7-side flip plate; 8-second jack; 9-side flip beam; 10-third jack; 20-base support. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figure 1 and Figure 2 As shown, the present invention provides a circulating movable tunnel support, comprising a base 1, a top beam 2, and a retractable support column 3 connected between the base 1 and the top beam 2. The base 1 is provided with support columns 3 at both ends in its length direction. The spacing formed by the support columns 3 at both ends is greater than the width of the base 1. After the support columns 3 are retracted, the net height of the top beam 2 (i.e., the distance between the upper end face of the top beam and the lower end face of the base) is less than the static air distance between the top beam 2 and the base 1 when the tunnel support is in a supporting state. The support column 3 adopts a retractable structure, and the support column adopts a sleeve structure. A jack is installed in the support column. By controlling the jack, the support column can be retracted. The retractable support column 3 of this structure adopts the existing technology, and its specific structure and working principle are not elaborated here.

[0029] The present invention preferably provides three or more support columns 3 on the base 1. Of course, two can also be provided. Three are provided in the figure. One support column 3 is provided at one end of the base 1, and two support columns 3 are provided in parallel at the other end of the base 1. The upper end of each support column 3 is fixedly connected to the top beam 2. One support column 3 at one end is located at the center line of the top beam 2, and the two support columns 3 at the other end are located symmetrically on both sides of the center line of the top beam 2. The tunnel support adopts at least three support columns 3, which improves the support strength and makes the support force distribution more reasonable. At the same time, the width of the beam body can be reduced in structure. The three support columns 3 form a three-point support, so that the support forms a stable support surface.

[0030] In order to improve the supporting capacity of the tunnel support, a first-level flip plate 4 is hinged at the end of the top beam 2 located above the two supporting columns 3, and a first jack 5 is provided below the first-level flip plate 4. The first jack 5 drives the first-level flip plate 4 to flip, so that when it flips upward to a horizontal state, the top beam 2 extends in its length direction, that is, the supporting length and area of ​​the top beam are extended. The first jack 5 here can adopt a push rod structure, such as an electric push rod, etc., which drives the first-level flip plate 4 to rotate around the edge of the top beam through extension and contraction. When support is needed, the push rod is started to unfold the first-level flip plate. When the position of the tunnel support needs to be moved, the push rod needs to be retracted to flip the first-level flip plate 4 down, thereby reducing the occupied volume of the entire tunnel support. At this time, the two parallel supporting columns 3 can make the supporting force distribution more uniform.

[0031] In addition to the primary flip plate 4, a secondary flip plate 6 can be hinged to the flip end of the primary flip plate 4. The secondary flip plate 6 is hinged to the hinged end of the primary flip plate 4 in a tight fit. The tight fit here means that the secondary flip plate 6 can be lifted or folded manually or with the help of a tool. After being lifted, the secondary flip plate 6 is in a cantilever state and its position is maintained unchanged by the friction generated by the tight fit. After the secondary flip plate 6 is flipped along the end of the primary flip plate 4, it can be flipped from a state flush with the primary flip plate 4 to a state folded with the primary flip plate 4. Here, the support position of the secondary flip plate can be determined based on the support conditions in the tunnel. It can be in an inclined support state or a horizontal support state. The support angle of the secondary flip plate 6 is determined based on the actual situation.

[0032] Of course, the present invention also provides a side flip plate 7 on each side of the base 1. The end of the side flip plate 7 is hinged to the base 1, and the two are driven by a second jack 8 to drive the side flip plate 7 to flip, so that it can flip between the horizontal and vertical states. When the side flip plate 7 flips to the horizontal state, its upper surface is flush with the upper surface of the base 1. The provision of the side flip plate can reduce the support density of the bracket. The side flip plates of adjacent tunnel brackets are seamlessly connected, which facilitates the movable tunnel bracket to move along the side flip plate and base on the tunnel bracket in the supporting state, realizing large-scale circular movement.

[0033] In order to compensate for the regional support between adjacent top beams, a side flip beam 9 is provided on both sides of the top beam 2. The end of the side flip beam 9 is hinged to the top beam 2, and the two are driven and connected by a third jack 10, which is used to drive the side flip beam 9 to flip, so that it can flip arbitrarily between the horizontal and vertical states.

[0034] Preferably, when the second jack 8 and the third jack 10 respectively drive the side flip plate 7 and the side flip beam 9 to flip to a flush state, the total width formed by the flip plates 7 on both sides and the base 1 is greater than or equal to the width of the support surface formed by the flip beams 9 on both sides and the top beam 2. The purpose is to maintain the docking state between the two adjacent bases to facilitate the movement of the tunnel support.

[0035] In order to maintain the radial support capability of the support columns 3, base supports 20 are provided at both ends of the base 1, which are higher than the upper end surface of the base 1. The lower portion of the support column 3 is placed in the base supports 20 to support the support column 3. Preferably, the base supports 20 and the base 1 are integrally formed, forming a structural whole through processes such as casting or welding.

[0036] The second jack 8 and the third jack 10 are both telescopic structures such as electric push rods, which are all existing technologies and their structures and working principles will not be elaborated on again.

[0037] The specific support method of large circulation tunnel support is as follows:

[0038] A. Figure 3 As shown, several tunnel supports are set along the length of the tunnel according to the tunnel width and arranged in sequence to complete the support of the tunnel top;

[0039] B. Fold the secondary flap, primary flap and side flip beam of the first tunnel support in sequence, and lower the support column to the lowest point. Then fold the side flip plate and rotate the tunnel support 90 degrees to make it perpendicular to the other tunnel supports in the supporting state, such as Figure 4 and Figure 5 As shown;

[0040] C. Lift the first laneway support onto the adjacent laneway support base, pull or drag the first laneway support through the space formed by the two support columns until it reaches the rear of the last laneway support, remove it, and rotate it 90° to become the last laneway support;

[0041] D. Then raise the supporting columns on the tunnel support, and unfold the first-level flip plate, second-level flip plate, side flip beam and side flip plate to complete the shift.

[0042] E. Repeat steps B, C and D for other tunnel supports and shift them in sequence.

[0043] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A circulating movable tunnel support, comprising a base (1), a top beam (2) and a retractable support column (3) connected between the base (1) and the top beam (2), characterized in that: The base (1) is provided with the supporting columns (3) at both ends in its length direction, the spacing formed by the supporting columns (3) at both ends is greater than the width of the base (1) and the top beam (2), and after the supporting columns (3) are retracted, the net height from the upper plane of the top beam (2) to the lower plane of the base (1) is less than the static distance between the top beam (2) and the base (1) when the tunnel support is in a supporting state; A side flip plate (7) is provided on each of the two side surfaces of the base. The end of the side flip plate (7) is hinged to the base (1), and the two are connected by a second jack (8) to form a driving connection, which is used to drive the side flip plate (7) to flip so that it can flip between a horizontal state and a vertical state. When the side flip plate (7) flips to a horizontal state, its upper plane is flush with the upper plane of the base (1). A side flip beam (9) is provided on each of the two side surfaces of the top beam (2). The end of the side flip beam (9) is hinged to the top beam (2), and the two are connected by a third jack (10) to form a driving connection for driving the side flip beam (9) to flip, so that the side flip beam (9) can be flipped arbitrarily between a horizontal state and a vertical state.

2. The circulating movable tunnel support according to claim 1, characterized in that: One end of the base (1) is provided with a supporting column (3), and the other end of the base (1) is provided with two supporting columns (3) arranged in parallel, and the upper end of each supporting column (3) is fixedly connected to the top beam (2).

3. The circulating movable tunnel support according to claim 2, characterized in that: The end of the top beam (2) located above the two supporting columns (3) is further hingedly connected to a first-level flip plate (4), and a first jack (5) is provided below the first-level flip plate (4). The first jack (5) drives the first-level flip plate (4) to flip, so that when the first-level flip plate (4) flips upward to a horizontal state, the top beam (2) extends in its length direction.

4. The circulating movable tunnel support according to claim 3, characterized in that: The flip end of the primary flip plate (4) is further hinged to a secondary flip plate (6), and the secondary flip plate (6) is tightly hinged to the hinge end of the primary flip plate (4). After the secondary flip plate (6) flips along the end of the primary flip plate (4), it can flip from an unfolded state with the primary flip plate (4) to a folded state with the primary flip plate (4).

5. The circulating movable tunnel support according to claim 1, characterized in that: When the second jack (8) and the third jack (10) respectively drive the side flip plate (7) and the side flip beam (9) to flip to a flush state, the total width formed by the two side flip plates (7) and the base (1) is greater than or equal to the width of the support surface formed by the two side flip beams (9) and the top beam (2).

6. The circulating movable tunnel support according to claim 1, characterized in that: Both ends of the base (1) are further provided with base supports (20) that are higher than the upper end surface of the base (1), and the lower portion of the support column (3) is placed in the base support (20) to stabilize the support column (3).

7. The circulating movable tunnel support according to claim 6, characterized in that: The base support (20) and the base (1) are an integral structure.

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