Working face roadway forepoling support

Abstract

The utility model relates to the technical field of roadway forepoling, in particular to a working face roadway forepoling support which comprises two first cross beams, two first longitudinal beams are fixedly connected between the two first cross beams, four second longitudinal beams are arranged above the first cross beams, the bottom ends of the second longitudinal beams are fixedly connected with two second cross beams, and the two second cross beams are fixedly connected with the bottom ends of the second longitudinal beams. A pushing oil cylinder is rotationally connected between the first cross beam and the second cross beam, two supporting oil cylinders are fixedly connected to the bottom end of each of the first cross beam and the second cross beam, a base is fixedly connected to the bottom ends of the supporting oil cylinders, a hydraulic rod is installed in the base, two sliding blocks are fixedly connected to the extension end of the hydraulic rod, and two sliding grooves are formed in the base. The sliding blocks are slidably connected with the sliding grooves, the outer portion of the base is slidably connected with an installation ring, the sliding blocks are fixedly connected with the installation ring, a plurality of soil nails are arranged at the bottom end of the installation ring, a plurality of inserting holes are formed in the bottom end of the base, and the soil nails are slidably connected with the inserting holes. The hydraulic rod drives the soil nails to be inserted into the bottom plate to prevent the base from sliding to affect the stability of the device.

Description

Technical Field

[0001] This utility model relates to a support support, specifically an advanced support support for working face roadways, belonging to the field of advanced roadway support technology. Background Technology

[0002] Advanced support supports for working face roadways are specialized support equipment used in underground mining operations such as coal mines to ensure the stability of the roof and surrounding rock in the advanced area of ​​the working face roadway (i.e., the roadway section in front of the working face in the direction of advancement). There are many types of these supports. Among them, the stepping self-moving tunneling support device is mainly used for advanced support of the roadway in front of the working face end. It is generally composed of a frame structure such as crossbeams and longitudinal beams, as well as hydraulic cylinders for support, pushing, and directional adjustment. Through alternating support and stepping movement, it advances with the tunneling progress to pre-stabilize the roof, which can prevent the roof from collapsing during tunneling and thus improve tunneling efficiency and safety.

[0003] However, the base of the support cylinder of the stepping self-propelled tunneling support device usually adopts a flat plate structure to contact the ground. Its fit with the ground is highly dependent on the flatness of the ground. Although the thrust of the support cylinder can make the base fit tightly with the ground, the fit effect is significantly reduced when the ground is uneven. Especially in inclined roadways, if the lateral force exceeds the maximum static friction between the base and the ground, the base is prone to slippage, which will damage the overall stability of the support device. Utility Model Content

[0004] The purpose of this utility model is to provide an advanced support bracket for working face roadways to solve the above-mentioned problems. The bracket uses a hydraulic rod to drive a slider to slide the mounting ring, allowing soil nails to extend along the base insertion hole and insert into the ground. This can quickly anchor the base to the ground, enhance the anti-slip ability of the support device on inclined or soft ground, and control the extension and retraction of the soil nails through the hydraulic rod, which makes it easy to flexibly adjust the extension and retraction state of the soil nails according to the ground conditions, reducing the resistance brought by the soil nails when the device moves on flat and hard ground, thus taking into account both the convenience of reinforcement and movement.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a working face roadway advance support bracket includes two first crossbeams, two first longitudinal beams fixedly connected between the two first crossbeams, four second longitudinal beams above the first crossbeams, two second crossbeams fixedly connected to the bottom of the second longitudinal beams, the second crossbeams and the first crossbeams being staggered in the horizontal direction, a pushing cylinder being rotatably connected between one of the first crossbeams and one of the second crossbeams, two supporting cylinders being fixedly connected to the bottom of each of the first and second crossbeams, a reinforcing component being provided at the bottom of the supporting cylinder, the reinforcing component including a base, a base being fixedly connected to the bottom of the supporting cylinder, a hydraulic rod being installed inside the base, two sliders being fixedly connected to the extended end of the hydraulic rod, two sliding grooves being opened on the base, the sliders being slidably connected to the sliding grooves, an installation ring being slidably connected to the outside of the base, the sliders being fixedly connected to the installation ring, multiple soil nails being provided at the bottom of the installation ring, multiple insertion holes being provided at the bottom of the base, and the soil nails being slidably connected to the insertion holes.

[0006] Preferably, the base has a "T" shaped cross-section, and the multiple soil nails and multiple insertion holes are arranged in a circumferential array.

[0007] Preferably, the four second longitudinal beams are arranged in a linear array, with the four second longitudinal beams located between the two first longitudinal beams.

[0008] Preferably, the ends of the two first longitudinal beams are rotatably connected to guardrails, which have a grid structure.

[0009] Preferably, both ends of a first crossbeam facing the guardrail are rotatably connected to guardrail cylinders, and the extended ends of the guardrail cylinders are rotatably connected to the guardrail.

[0010] Preferably, a protective net is laid at the top of the four second longitudinal beams, and three positioning rods are fixedly connected to both ends of the protective net. Positioning holes are opened at both ends of the three second longitudinal beams, and the positioning rods are inserted into the positioning holes.

[0011] Preferably, each end of the protective net is rotatably connected to a bolt, and the bolt is threadedly connected to another second longitudinal beam.

[0012] Preferably, two directional adjustment cylinders are fixedly connected to a first crossbeam on which the guardrail cylinder is installed, and the extended end of the directional adjustment cylinder is fixedly connected to a top block.

[0013] Preferably, the two directional adjusting cylinders are symmetrically arranged about the middle of the first crossbeam, and the top block has a frustum-shaped structure.

[0014] The beneficial effects of this utility model are as follows: A base is fixedly connected to the bottom of the supporting cylinder, a hydraulic rod is installed inside the base, and two sliders are fixedly connected to the extended end of the hydraulic rod. Two sliding grooves are opened on the base, and the sliders are slidably connected to the sliding grooves. An installation ring is slidably connected to the outside of the base, and the sliders are fixedly connected to the installation ring. Multiple soil nails are provided at the bottom end of the installation ring, and multiple insertion holes are provided at the bottom end of the base, with the soil nails slidably connected to the insertion holes. By driving the sliders with the hydraulic rod, the installation ring is moved, causing the soil nails to extend along the insertion holes of the base and insert into the ground. This can quickly achieve anchoring of the base to the ground, enhancing the anti-slip capability of the support device on inclined or soft ground. Furthermore, the extension and retraction of the soil nails are controlled by the hydraulic rod, making it easy to flexibly adjust the extension and retraction state of the soil nails according to ground conditions, reducing the resistance brought by the soil nails when the device moves on flat, hard ground, thus balancing the convenience of reinforcement and movement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the first crossbeam and the supporting cylinder of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the support cylinder and the base of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the second longitudinal beam and the protective netting of this utility model;

[0019] Figure 5 for Figure 4 The diagram shows an enlarged view of part A.

[0020] In the diagram: 1. First crossbeam; 2. First longitudinal beam; 3. Second crossbeam; 4. Second longitudinal beam; 5. Pushing cylinder; 6. Support cylinder; 7. Reinforcing component; 701. Base; 702. Hydraulic rod; 703. Slider; 704. Slide groove; 705. Mounting ring; 706. Soil nail; 707. Insertion hole; 8. Guardrail; 9. Guardrail cylinder; 10. Protective net; 11. Positioning rod; 12. Positioning hole; 13. Bolt; 14. Direction adjustment cylinder; 15. Top block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 As shown, a pre-support bracket for a working face roadway includes two first crossbeams 1, two first longitudinal beams 2 fixedly connected between the two first crossbeams 1, four second longitudinal beams 4 above the first crossbeams 1, and two second crossbeams 3 fixedly connected to the bottom of the second longitudinal beams 4. The second crossbeams 3 and the first crossbeams 1 are staggered in the horizontal direction. A pushing cylinder 5 is rotatably connected between one of the first crossbeams 1 and one of the second crossbeams 3. Two supporting cylinders 6 are fixedly connected to the bottom of each of the first crossbeams 1 and the second crossbeams 3. The bottom of each supporting cylinder 6 is provided with a reinforcing component 7, which includes a base 701. A base 701 is fixedly connected to the base 701, and a hydraulic rod 702 is installed inside the base 701. Two sliders 703 are fixedly connected to the extended end of the hydraulic rod 702. Two sliding grooves 704 are opened on the base 701, and the sliders 703 are slidably connected to the sliding grooves 704. An installation ring 705 is slidably connected to the outside of the base 701, and the sliders 703 are fixedly connected to the installation ring 705. Multiple soil nails 706 are provided at the bottom end of the installation ring 705. Multiple insertion holes 707 are provided at the bottom end of the base 701, and the soil nails 706 are slidably connected to the insertion holes 707. Four second longitudinal beams 4 are arranged in a linear array and are located between two first longitudinal beams 2.

[0023] As a technical optimization of this utility model, the cross-section of the base 701 is T-shaped, and the multiple soil nails 706 and multiple insertion holes 707 are arranged in a circumferential array. The soil nails 706 are distributed in a circumferential array, which can uniformly transmit the anchoring force.

[0024] As a technical optimization of this utility model, the ends of the two first longitudinal beams 2 are rotatably connected to guardrails 8. The guardrails 8 have a grid structure. Both ends of a first crossbeam 1 facing the guardrails 8 are rotatably connected to guardrail cylinders 9. The extended ends of the guardrail cylinders 9 are rotatably connected to the guardrails 8. By controlling the extension of the guardrail cylinders 9, the extended ends of the guardrail cylinders 9 push the guardrails 8 to rotate upward, thereby allowing the guardrails 8 to unfold and play a good protective role. Moreover, the angle of the guardrails 8 is adjustable, which can better adapt to the tilt angle of the roadway roof.

[0025] As a technical optimization of this utility model, a protective net 10 is laid on the top of the four second longitudinal beams 4. Three positioning rods 11 are fixedly connected to both ends of the protective net 10. Positioning holes 12 are opened at both ends of the three second longitudinal beams 4. The positioning rods 11 are inserted into the positioning holes 12. When installing the protective net 10, the positioning rods 11 at both ends of the protective net 10 are inserted into the corresponding positioning holes 12 on the second longitudinal beams 4 to quickly complete the initial installation of the protective net 10. A bolt 13 is rotatably connected to both ends of the protective net 10. The bolt 13 is threadedly connected to another second longitudinal beam 4. Then, the bolts 13 at both ends of the protective net 10 are tightened to make the bolts 13 threadedly connected to the corresponding second longitudinal beams 4, thereby forming a top protective barrier to prevent debris from falling from the top plate.

[0026] As a technical optimization of this utility model, two directional adjustment cylinders 14 are fixedly connected to a first crossbeam 1 on which the guardrail cylinder 9 is installed. The extended end of the directional adjustment cylinder 14 is fixedly connected to a top block 15. The two directional adjustment cylinders 14 are symmetrically arranged about the middle of the first crossbeam 1. The top block 15 has a frustum-shaped structure. When it is necessary to adjust the forward direction of the support device, the directional adjustment cylinder 14 on one side is controlled to extend. The directional adjustment cylinder 14 drives the top block 15 to push against the roadway side to generate a reaction force, which can push the support device to shift laterally and quickly adjust the forward direction.

[0027] In use, when the device needs to be moved forward, the support cylinder 6 at the bottom of the first crossbeam 1 is retracted, causing the base 701 at its bottom to lift off the ground. Simultaneously, the first crossbeam 1 causes the first longitudinal beam 2 to descend and press against the second crossbeam 3. Then, the pushing cylinder 5 is retracted, pulling the first crossbeam 1 and the support cylinder 6 at its bottom forward. Next, the support cylinder 6 at the bottom of the first crossbeam 1 is extended, causing the base 701 at its bottom to contact the ground. Simultaneously, the first longitudinal beam 2 moves upward to press against the top plate. Finally, the support cylinder at the bottom of the second crossbeam 3 is retracted. 6. The retraction mechanism lifts the base 701 off the ground, simultaneously causing the second longitudinal beam 4 to descend and press against the first cross beam 1. Then, the extension cylinder 5 is controlled to extend. Since the extended end of the extension cylinder 5 is rotatably connected to the first cross beam 1, and the first cross beam 1 cannot move under the support of its bottom support cylinder 6, the extension of the extension cylinder 5 pushes the second cross beam 3, causing its bottom support cylinder 6 and the second longitudinal beam 4 to move forward. Next, the extension of the support cylinder 6 at the bottom of the second cross beam 3 is controlled, causing the second longitudinal beam 4 and the protective net 10 to move upward and press against the top plate. Thus, the device's forward movement is achieved through the alternating lifting and pushing of the two sets of support units, thereby providing a good working effect. Effective support: Sensors on the support device monitor the ground conditions in real time. When the device moves on inclined or soft ground, the hydraulic rod 702 retracts. Simultaneously, the retraction of the extended end of the hydraulic rod 702 drives the mounting ring 705 to slide downwards on the base 701 via the slider 703. The downward sliding of the mounting ring 705 also drives the soil nail 706 downwards, penetrating the insertion hole 707 at the bottom of the base 701. When the support cylinder 6 extends, it synchronously drives the soil nail 706 downwards and inserts it into the ground, thus achieving rigid anchoring of the base 701 to the ground and preventing slippage of the support device during support. When the device operates on relatively flat and hard ground, the hydraulic rod 702 can be used to control the soil nail 706 to retract and not contact the ground, or to reduce the insertion depth of the soil nail 706, thereby reducing the anchoring force of the soil nail 706 on the ground, thus reducing the resistance when the device moves forward and improving the moving efficiency of the device; the protective net 10 can prevent gravel, rocks and other debris from falling from the top of the roadway and damaging the tunneling machine; when it is necessary to adjust the forward direction of the support device, the corresponding unilateral direction adjustment cylinder 14 is extended according to the actual needs and drives the top block 15 to push the roadway side, thereby the reaction force pushes the support device to shift laterally, thereby quickly adjusting the forward direction of the support device.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A working face roadway advance support support frame comprising two first cross beams (1), characterized in that: Two first longitudinal beams (2) are fixedly connected between the two first crossbeams (1). Four second longitudinal beams (4) are provided above the first crossbeams (1). Two second crossbeams (3) are fixedly connected to the bottom of the second longitudinal beams (4). The second crossbeams (3) and the first crossbeams (1) are staggered in the horizontal direction. A pushing cylinder (5) is rotatably connected between one of the first crossbeams (1) and one of the second crossbeams (3). Two supporting cylinders (6) are fixedly connected to the bottom of both the first crossbeams (1) and the second crossbeams (3). A reinforcing component (7) is provided at the bottom of the supporting cylinder (6). The reinforcing component (7) includes a base (701). The supporting cylinder (6) The bottom end of the base is fixedly connected to a base (701), and a hydraulic rod (702) is installed inside the base (701). Two sliders (703) are fixedly connected to the extended end of the hydraulic rod (702). Two sliding grooves (704) are opened on the base (701). The sliders (703) are slidably connected to the sliding grooves (704). An installation ring (705) is slidably connected to the outside of the base (701). The sliders (703) are fixedly connected to the installation ring (705). Multiple soil nails (706) are provided at the bottom end of the installation ring (705). Multiple insertion holes (707) are provided at the bottom end of the base (701). The soil nails (706) are slidably connected to the insertion holes (707).

2. The working face gateway advance support support according to claim 1, characterized in that: The base (701) has a "T" shaped cross section, and the multiple soil nails (706) and multiple insertion holes (707) are arranged in a circumferential array.

3. The working face gateway advance support support according to claim 1, characterized in that: The four second longitudinal beams (4) are arranged in a linear array, and the four second longitudinal beams (4) are located between the two first longitudinal beams (2).

4. The pre-support bracket for working face roadways according to claim 3, characterized in that: The ends of the two first longitudinal beams (2) are rotatably connected to guardrails (8), which are in the form of a grid structure.

5. The working face gateway advance support support according to claim 1, characterized in that: Both ends of a first crossbeam (1) facing the guardrail (8) are rotatably connected to guardrail cylinders (9), and the extended ends of the guardrail cylinders (9) are rotatably connected to the guardrail (8).

6. The working face gateway advance support support according to claim 3, characterized in that: The top of the four second longitudinal beams (4) is covered with a protective net (10). Three positioning rods (11) are fixedly connected to both ends of the protective net (10). Positioning holes (12) are opened at both ends of the three second longitudinal beams (4). The positioning rods (11) are inserted into the positioning holes (12).

7. A working face gateway advance support support according to claim 6, characterized in that: Both ends of the protective net (10) are rotatably connected to a bolt (13), and the bolt (13) is threadedly connected to another second longitudinal beam (4).

8. The working face gateway advance support support according to claim 5, characterized in that: Two directional adjustment cylinders (14) are fixedly connected to a first crossbeam (1) on which a guardrail cylinder (9) is installed. The extended end of the directional adjustment cylinder (14) is fixedly connected to a top block (15).

9. A working face gateway advance support support according to claim 8, characterized in that: The two directional adjustment cylinders (14) are symmetrically arranged about the middle of the first crossbeam (1), and the top block (15) has a frustum-shaped structure.

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