Progressive tunneling working face temporary supporting structure

Abstract

The utility model discloses a progressive temporary supporting structure for a tunneling working face, and belongs to the field of underground coal mine tunneling working face supporting. A progressive temporary supporting structure for a tunneling working face comprises a fixing frame; the telescopic sleeve is connected to the fixing frame; the supporting frame is fixedly connected to the telescopic end of the telescopic sleeve; the first hydraulic cylinder is fixedly connected into the fixing frame; the driving end of the first hydraulic cylinder is fixedly connected with the telescopic sleeve; the anchor beam is connected to the supporting frame; the supporting net is connected to the anchor beam; the temporary supporting structure is fixed on the roadway top plate through the anchor rod, so that the stability of the temporary supporting structure can be ensured, and the problem of unstable walking caused by fluctuation of the roadway bottom plate is avoided; the first hydraulic cylinder and the second hydraulic cylinder both adopt independent pneumatic liquid injection pump stations as power sources, power is stable, the hydraulic cylinders stretch out and draw back fast, the supporting efficiency is high, and the efficiency of advance temporary supporting of the driving face is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground coal mine excavation working face support, in particular to a progressive excavation working face temporary support structure. Background Art

[0002] At present, there are two types of advanced temporary support methods commonly used in underground coal mine excavation working faces: one is the ground walking type, and the other is the integrated type installed on the tunnel boring machine; the ground walking type structure is affected by the ups and downs of the tunnel bottom plate, and is prone to unstable walking and falling; and the integrated structure installed on the tunnel boring machine needs to borrow the existing multi-purpose excavator emulsion as a power source, which is easy to destroy the power balance of the tunnel boring machine, and the tunnel boring machine needs to retreat during the construction process to complete the temporary support, which is easy to cause a double waste of manpower and resources, and the excavation speed and efficiency need to be further improved. Utility Model Content

[0003] The purpose of the utility model is to solve the problems raised in the above-mentioned background technology, and to propose a progressive excavation working face temporary support structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A temporary support structure for a progressive excavation working face, comprising:

[0006] Fixed frame;

[0007] A telescopic sleeve connected to the fixed frame;

[0008] A support frame is fixedly connected to the telescopic end of the telescopic sleeve;

[0009] A first hydraulic cylinder is fixedly connected to a fixed frame;

[0010] The first hydraulic cylinder driving end is fixedly connected to the telescopic sleeve;

[0011] Anchor beam, connected to the support frame;

[0012] Support net, connected to the anchor beam;

[0013] When the first hydraulic cylinder pushes the telescopic sleeve out, the telescopic sleeve pushes the support frame out, and the support frame drives the anchor beam and the support net to be close to the tunnel roof.

[0014] Preferably, a second hydraulic cylinder is connected to the fixing frame, and a driving end of the second hydraulic cylinder is rotationally connected to the supporting frame.

[0015] Furthermore, a connection card is connected to the fixing frame.

[0016] Furthermore, an anchor rod is connected to the tunnel roof, and the anchor rod is connected to the connection card.

[0017] Preferably, a safety bracket is fixedly connected to the bottom of the fixing frame.

[0018] Compared with the prior art, the utility model provides a progressive excavation working face temporary support structure, which has the following beneficial effects:

[0019] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The utility model can ensure the stability of the temporary support structure by fixing the temporary support structure on the tunnel roof with the help of anchor rods, avoiding the problem of unstable walking due to the ups and downs of the tunnel floor; the first hydraulic cylinder and the second hydraulic cylinder in the utility model both use independent pneumatic injection pump stations as power sources, with stable power, fast hydraulic cylinder extension and retraction speed, high support efficiency, and effectively improve the efficiency of advance temporary support of the excavation working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a connection structure between a temporary support structure of a progressive excavation working face and a tunnel roof proposed by the utility model;

[0021] Figure 2 A structural schematic diagram of a progressive excavation working face temporary support structure proposed by the utility model;

[0022] Figure 3 It is a structural schematic diagram of a fixed frame and a supporting frame in a temporary supporting structure for a progressive excavation working face proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the connection structure between the first hydraulic cylinder and the fixed frame in a progressive excavation working face temporary support structure proposed by the utility model;

[0024] Figure 5 It is a schematic diagram of the connection structure between the tunnel roof and the anchor rod in a progressive excavation working face temporary support structure proposed by the utility model;

[0025] Figure 6 A progressive excavation working face temporary support structure proposed by the utility model Figure 1 Enlarged view of part A.

[0026] In the figure: 1. tunnel bottom plate; 2. safety bracket; 3. tunnel top plate; 301. anchor rod; 4. connecting card; 5. anchor beam; 501. support net; 6. support frame; 7. fixed frame; 701. second hydraulic cylinder; 702. telescopic sleeve; 8. first hydraulic cylinder. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Embodiment 1:

[0029] Reference Figure 1-Figure 6 , a temporary support structure for progressive excavation working face, comprising:

[0030] Fixed frame 7;

[0031] The telescopic sleeve 702 is connected to the fixing frame 7;

[0032] The support frame 6 is fixedly connected to the telescopic end of the telescopic sleeve 702;

[0033] A first hydraulic cylinder 8 is fixedly connected to a fixed frame 7;

[0034] The driving end of the first hydraulic cylinder 8 is fixedly connected to the telescopic sleeve 702;

[0035] Anchor beam 5, connected to support frame 6;

[0036] A support net 501 is connected to the anchor beam 5;

[0037] When the first hydraulic cylinder 8 pushes the telescopic sleeve 702 out, the telescopic sleeve 702 pushes the support frame 6 to extend, and the support frame 6 drives the anchor beam 5 and the support net 501 to be close to the tunnel roof 3.

[0038] The fixing frame 7 is connected to a second hydraulic cylinder 701 , and a driving end of the second hydraulic cylinder 701 is rotationally connected to the supporting frame 6 .

[0039] Reference Figure 1 , Figure 3 The second hydraulic cylinder 701 arranged on the fixed frame 7 can support the support frame 6 to the left and right, thereby improving the support stability of the support frame 6.

[0040] The fixing frame 7 is connected with a connection card 4 .

[0041] An anchor rod 301 is connected to the tunnel roof 3 , and the anchor rod 301 is connected to the connection card 4 .

[0042] Reference Figure 1-Figure 6During use, when the tunnel boring machine completes the tunneling operation and lays the support net 501, the telescopic sleeve 702 connected to its driving section is pushed to move by the first hydraulic cylinder 8, and the telescopic sleeve 702 will slide out. When the telescopic sleeve 702 slides out, it will synchronously drive the support frame 6 to move. After the support frame 6 moves a certain distance, the anchor rod 301 is installed at the empty top of the tunnel roof 3, and the support frame 6 and the anchor rod 301 are connected by the connecting card 4, so that the temporary support operation can be completed;

[0043] When the roof support operation is completed, the staff manually removes the connecting card 4 on the fixed frame 7, and drives the telescopic sleeve 702 to retract and reset through the first hydraulic cylinder 8. The retraction of the telescopic sleeve 702 will simultaneously pull the fixed frame 7 to move, and then move the fixed frame 7 to the position below the support frame 6. Through such a cyclic reciprocating operation, the support structure moves forward with the advancement of the tunnel boring machine, and can play a temporary support role.

[0044] The bottom of the fixing frame 7 is fixedly connected with a safety bracket 2 .

[0045] Reference Figure 1 When the temporary supporting structure falls accidentally, the safety bracket 2 can play a supporting role, and at this time the safety bracket 2 will resist the tunnel bottom plate 1.

[0046] The utility model can ensure the stability of the temporary support structure by fixing the temporary support structure on the tunnel roof 3 with the help of anchor rods 301, and avoid the problem of unstable walking caused by the ups and downs of the tunnel bottom plate 1; in the utility model, the first hydraulic cylinder 8 and the second hydraulic cylinder 701 both use independent pneumatic injection pump stations as power sources, which have stable power, fast hydraulic cylinder extension and retraction speed, high support efficiency, and effectively improve the efficiency of advance temporary support of the excavation working face.

[0047] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A progressive excavation working face temporary support structure, characterized in that: include: Fixed frame (7); A telescopic sleeve (702) connected to the fixing frame (7); A support frame (6) is fixedly connected to the telescopic end of the telescopic sleeve (702); A first hydraulic cylinder (8) is fixedly connected to the fixing frame (7); The driving end of the first hydraulic cylinder (8) is fixedly connected to the telescopic sleeve (702); An anchor beam (5) connected to the support frame (6); A support net (501) connected to the anchor beam (5); When the first hydraulic cylinder (8) pushes the telescopic sleeve (702) out, the telescopic sleeve (702) pushes the support frame (6) out, and the support frame (6) drives the anchor beam (5) and the support net (501) to be close to the tunnel roof (3).

2. A progressive excavation working face temporary support structure according to claim 1, characterized in that: The fixing frame (7) is connected to a second hydraulic cylinder (701), and a driving end of the second hydraulic cylinder (701) is rotationally connected to the supporting frame (6).

3. A progressive excavation working face temporary support structure according to claim 1, characterized in that: The fixing frame (7) is connected to a connection card (4).

4. A progressive excavation working face temporary support structure according to claim 3, characterized in that: An anchor rod (301) is connected to the tunnel roof (3), and the anchor rod (301) is connected to the connection card (4).

5. A progressive excavation working face temporary support structure according to claim 1, characterized in that: The bottom of the fixing frame (7) is fixedly connected with a safety bracket (2).

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