A device and method for supporting branch tunnels in continuous mining and filling working faces

Abstract

The present invention discloses a device and method for supporting a branch tunnel in a continuous mining and filling working face. The device comprises a mechanical arm and a plurality of telescopic rods, each of which is disposed on an operating platform of a continuous coal miner. When the continuous coal miner excavates along a branch tunnel, the mechanical arm can grasp the telescopic rods to below the roof at the top of the branch tunnel and extend the telescopic rods until both ends of the telescopic rods support the coal walls on both sides of the branch tunnel to form support for the roof. When the continuous coal miner excavates through the branch tunnel and retreats, the mechanical arm can shorten the telescopic rods below the roof and grasp the telescopic rods back to the operating platform. The method for supporting a branch tunnel in a continuous mining and filling working face employs the aforementioned support device to support the branch tunnel. Compared with the prior art, the present invention can improve the efficiency of supporting branch tunnels in a continuous mining and filling working face, thereby improving the efficiency of excavating the branch tunnels and the production efficiency of continuous mining and filling.

Description

Technical Field

[0001] The present invention relates to the technical field of coal filling mining, and in particular to a branch tunnel supporting device and method for a continuous mining and filling working face. Background Art

[0002] The contradiction between coal mining and ecological and environmental protection in my country is becoming increasingly prominent, severely restricting the sustainable development of mining areas. Maximizing coal resource recovery while minimizing overburden damage, surface subsidence, and water resource depletion caused by mining are essential for the healthy development of the coal industry. Backfill mining is an effective method for overcoming these challenges and minimizing environmental damage. Furthermore, it allows the use of waste rock discharged from mines as backfill material into goafs, preventing the waste rock from being brought up to the surface and reducing the discharge of solid waste to the surface.

[0003] Continuous mining and backfilling technology is a primary form of backfill mining. Compared to fully mechanized mining and backfilling, it offers the following advantages: tunneling and backfilling processes are separated from the same tunnel, allowing for parallel operations without interference. The working face eliminates the need for expensive fully mechanized mining supports, resulting in a simple mining and backfilling production system, requiring minimal equipment and personnel, and simplifying production management. The process is flexible and suitable for recovering small, irregular coal masses, such as marginal coal and protective coal pillars. However, the efficiency of continuous mining and backfilling remains relatively low, with a single set of equipment typically producing only 300,000 to 400,000 tons per year, far short of the millions of tons per year capacity of a normal working face. The primary reason for this low efficiency is that, during the excavation of branch tunnels, roof support must be installed using anchor bolts, cables, and meshes to ensure safety. These labor-intensive and time-consuming methods consume three-quarters of the excavation time, significantly reducing the efficiency of branch tunnels. This reduced efficiency in branch tunnels limits the full potential of continuous mining and backfilling, resulting in low efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a branch tunnel support device and method for a continuous mining and filling working face in response to the deficiencies in the above-mentioned prior art, which can improve the branch tunnel support efficiency of the continuous mining and filling working face, thereby improving the excavation efficiency of the branch tunnel and the production efficiency of continuous mining and filling.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a branch tunnel support device for a continuous mining and filling working face, comprising:

[0007] A plurality of telescopic rods, wherein the plurality of telescopic rods are placed on an operating platform of the continuous miner;

[0008] a mechanical arm, the mechanical arm being arranged on an operating platform of the continuous miner;

[0009] When the continuous coal miner advances along the branch tunnel, the mechanical arm can grab the telescopic rod to the bottom of the roof at the top of the branch tunnel and extend the telescopic rod to the ends of the telescopic rod to support the coal walls on both sides of the branch tunnel to form support for the roof. When the continuous coal miner retreats after excavating the branch tunnel, the mechanical arm can shorten the telescopic rod under the roof and grab the telescopic rod back to the operating platform.

[0010] Preferably, the telescopic rod includes a main rod and support rods threadedly connected to both ends of the main rod.

[0011] Preferably, one of the main rod and the support rod has an internal thread, and the other has an external thread matching the internal thread, and the main rod and the support rod are connected via the internal thread and the external thread.

[0012] Preferably, the main rod has a length of 3 to 6 m and a diameter of 5 to 15 cm, the support rod has a length of 1 to 2 m and a diameter of 4 to 14 cm, and the length of the threads on the main rod and the support rod is 1 to 2 m.

[0013] Preferably, the robotic arm includes a first robotic arm, a second robotic arm and a third robotic arm, and the second robotic arm and the third robotic arm are respectively arranged on both sides of the first robotic arm. The first robotic arm and the second robotic arm and the third robotic arm cooperate to grasp, move and extend the telescopic rod.

[0014] Preferably, the second robotic arm and the third robotic arm are respectively provided with a dynamometer.

[0015] Preferably, it further includes a remote controller, which is used to control the first robotic arm, the second robotic arm and the third robotic arm.

[0016] In a second aspect, the present invention provides a method for supporting a branch tunnel in a continuous mining and continuous filling working face, wherein the branch tunnel is supported by the branch tunnel supporting device for the continuous mining and continuous filling working face as described in the first aspect, comprising the following steps:

[0017] The continuous miner begins to dig and mine coal along the branch tunnel;

[0018] Each time the continuous miner advances a certain distance, the mechanical arm grabs one of the telescopic rods from the operating platform to support the roof above the branch tunnel area where coal mining has been completed, until the continuous miner digs through the branch tunnel and completes the coal mining operation;

[0019] When the continuous coal miner retreats after excavating the branch tunnel, each time the continuous coal miner moves under each of the telescopic rods supporting the roof, the robotic arm removes each of the telescopic rods and retracts them onto the operating platform until the continuous coal miner completely exits the branch tunnel and retracts all of the telescopic rods.

[0020] Preferably, the method in which the robotic arm grabs one of the telescopic rods to support the roof above the branch tunnel area where coal mining has been completed is as follows:

[0021] The robotic arm first grabs one of the telescopic rods from the operating platform and moves it to the lower side of the roof above the branch tunnel area where coal mining has been completed, and then extends the telescopic rod to the two ends of the telescopic rod to respectively support the coal walls on both sides of the branch tunnel, thereby completing the support of the roof above the branch tunnel area where coal mining has been completed.

[0022] Preferably, the method for the robotic arm to remove each telescopic rod and retract it onto the operating platform is as follows:

[0023] The robotic arm first grabs and fixes each of the telescopic rods supporting the roof, then shortens the telescopic rods to separate them from the coal walls on both sides of the branch tunnel, and finally grabs the telescopic rods and puts them back on the operating platform.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Each temporary support operation of the present invention is short and performed in parallel with the continuous miner's coal cutting operation. This improves the support efficiency of the branch tunnels in the continuous mining and filling working face, thereby improving the excavation efficiency of the branch tunnels and, in turn, the production efficiency of the continuous mining and filling. Furthermore, the telescopic rods of the present invention can be recycled and reused after the branch tunnels are excavated, which reduces the material consumption of the support and the proportion of the support cost in the total cost, thereby improving the economic benefits of continuous mining and filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. It should be noted that in all the drawings, the various elements or parts are not necessarily drawn according to the actual scale.

[0027] Figure 1 This is a schematic cross-sectional diagram of conventional anchor bolts and anchor cables supporting the first round of mining of a branch lane in a continuous mining and filling working face in the prior art;

[0028] Figure 2 This is a schematic cross-sectional diagram of conventional anchor rod and anchor cable support for branch lanes after the continuous mining and filling working face is fully filled in the existing technology;

[0029] Figure 3Schematic diagram of the extended state of the telescopic rod of the continuous mining and filling working face support device in an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the telescopic rod of the continuous mining and filling working face support device in a shortened state according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the main view of the support operation of the support device for the continuous mining and filling working face in an embodiment of the present invention;

[0032] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0033] Figure 7 Schematic diagram of a top view of the support operation of the support device for the continuous mining and filling working face according to an embodiment of the present invention;

[0034] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0035] Figure 9 It is a side view schematic diagram of the support operation of the support device for the continuous mining and filling working face in an embodiment of the present invention;

[0036] Figure 10 This is a schematic cross-sectional diagram of the support of the branch tunnel in the first round of mining in the continuous mining and filling working face according to an embodiment of the present invention;

[0037] Figure 11 for Figure 10 A partial enlarged view of point C in the middle;

[0038] Figure 12 This is a schematic diagram of the support profile of the branch tunnel after the continuous mining and filling working face is fully filled in an embodiment of the present invention.

[0039] In the picture:

[0040] 1. Telescopic rod; 11. Main rod; 12. Support rod; 2. Robotic arm; 21. First robot arm; 22. Second robot arm; 23. Third robot arm; 24. Dynamometer; 3. Continuous miner; 31. Operating platform; 4. Branch tunnel; 41. Roof. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the systems or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing those components. Unless otherwise stated, these terms have no special meanings and should not be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] Backfill mining is an effective coal mining method that minimizes environmental damage. Continuous mining and backfilling is a primary form of backfilling. To ensure safety, both backfilling and backfilling require roof support during tunneling.

[0045] At present, the roof support of the branch tunnels in the continuous mining and filling working face adopts the method of constructing anchor rods, anchor cables or laying nets on the roof, which has the following problems: (1) The operation time accounts for more than 3 / 4 of the total time of branch tunnel excavation, squeezing out the normal coal mining time; (2) After the working face is fully filled and mined, the roof is covered with anchor rods, anchor cables and anchor nets, the material consumption is large and difficult to recycle, making the support cost account for a large proportion of the total cost; (3) The construction of anchor rods, anchor cables or laying nets on the roof is the roof support method adopted for tunnels that are used for a long time of more than one year. In the continuous mining and filling working face, the length of the branch tunnel is short (about 100m), the excavation time is short (1 to 2 days), and the empty roof time before filling is short (1 to 2 days). There will be no obvious roof collapse phenomenon, and there is no need to adopt strong support like conventional tunnels. Therefore, the present invention provides a branch tunnel support device and method for a continuous mining and filling working face, which can improve the branch tunnel support efficiency of the continuous mining and filling working face, thereby improving the excavation efficiency of the branch tunnel and the production efficiency of continuous mining and filling.

[0046] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0047] Example 1

[0048] like Figure 3-Figure 12 As shown, an embodiment of the present invention provides a branch tunnel support device for a continuous mining and filling working face, comprising:

[0049] A plurality of telescopic rods 1 are placed on the operating platform 31 of the continuous coal mining machine 3;

[0050] A mechanical arm 2, which is arranged on an operating platform 31 of a continuous coal miner 3;

[0051] When the continuous coal miner 3 advances along the branch tunnel 4, the robotic arm 2 can grab the telescopic rod 1 to the bottom of the roof 41 at the top of the branch tunnel 4 and extend the telescopic rod 1 until the two ends of the telescopic rod 1 support the coal walls on both sides of the branch tunnel 4 to form support for the roof 41. When the continuous coal miner 3 retreats after excavating the branch tunnel 4, the robotic arm 2 can shorten the telescopic rod 1 under the roof 41 and grab the telescopic rod 1 back to the operating platform 31.

[0052] It should be noted that the specific number of telescopic rods 1 in this embodiment can be set according to actual factors such as the length of the branch tunnel 4, and the present invention does not impose any limitation on this.

[0053] During the excavation operation of the continuous coal mining machine 3 along the branch tunnel 4, each time the continuous coal mining machine 3 advances a certain distance, the robot arm 2 can grab a telescopic rod 1 from the operating platform 31 of the continuous coal mining machine 3 and move it to the lower side of the roof 41 above the branch tunnel 4 area where coal mining has been completed, and then extend the telescopic rod 1 until its ends tighten against the coal walls on both sides of the branch tunnel 4, thereby forming support for the roof 41 above the branch tunnel 4 area where coal mining has been completed, and preventing the roof 41 from falling off. Since each temporary support operation of the embodiment of the present invention is short in time and is performed in parallel with the coal cutting operation of the continuous coal mining machine 3, the embodiment of the present invention can improve the support efficiency of the branch tunnel 4 of the continuous mining and filling working face, thereby improving the excavation efficiency of the branch tunnel 4, and further improving the production efficiency of continuous mining and filling.

[0054] In addition, when the continuous miner 3 excavates the branch tunnel 4 and then exits the branch tunnel 4, when the continuous miner 3 moves below each telescopic rod 1 used to support the roof 41, the robotic arm 2 can grab each telescopic rod 1, shorten the telescopic rod 1, and then retract the telescopic rod 1 onto the operating platform 31 of the continuous miner 3. Therefore, the support materials of the embodiment of the present invention can be recycled and reused, which can reduce the material consumption of the roof 41 support and the proportion of the support cost in the total cost, thereby improving the economic benefits of continuous mining and filling.

[0055] Furthermore, the telescopic rod 1 includes a main rod 11 and support rods 12 threadedly connected to both ends of the main rod 11.

[0056] One of the main rod 11 and the support rod 12 has an internal thread, and the other has an external thread matching the internal thread, and the main rod 11 and the support rod 12 are connected by the internal and external threads. When the telescopic rod 1 of this embodiment is used, it can be extended or shortened by fixing one of the main rod 11 and the support rod 12 and rotating the other.

[0057] It should be noted that the length, diameter and connecting thread length of the main rod 11 and the support rod 12 in this embodiment can be specifically set according to on-site conditions such as the width of the branch tunnel 4 and the weight of the top plate 41, and the present invention does not impose any restrictions on this.

[0058] Preferably, the main rod 11 is 3 to 6 meters long and 5 to 15 cm in diameter, the support rod 12 is 1 to 2 meters long and 4 to 14 cm in diameter, and the length of the threads on the main rod 11 and the support rod 12 is 1 to 2 meters.

[0059] Furthermore, the robotic arm 2 includes a first robotic arm 21, a second robotic arm 22 and a third robotic arm 23. The second robotic arm 22 and the third robotic arm 23 are respectively arranged on both sides of the first robotic arm 21. The first robotic arm 21, the second robotic arm 22 and the third robotic arm 23 can cooperate to grasp, move and extend the telescopic rod 1.

[0060] Preferably, the first robotic arm 21 of this embodiment is used to grab and fix the main rod 11, and the second robotic arm 22 and the third robotic arm 23 are used to rotate the support rods 12 to extend or shorten the telescopic rod 1. When supporting the roof 41 of the branch tunnel 4, the first robotic arm 21 grabs one of the telescopic rods 1 from the operating platform 31 of the continuous coal mining machine 3 and moves it to the bottom of the roof 41 to be supported. Then, the first robotic arm 21 fixes the main rod 11, and the second robotic arm 22 and the third robotic arm 23 rise to clamp the support rods 12 at both ends of the main rod 11 and rotate to extend the telescopic rod 1 until its two ends support the coal walls on both sides of the branch tunnel 4. Finally, the first robotic arm 21, the second robotic arm 22 and the third robotic arm 23 detach from the telescopic rods. 1 returns to the starting position; when the telescopic rod 1 supporting the roof 41 is removed, the first robotic arm 21 grabs and fixes the main rod 11, the second robotic arm 22 and the third robotic arm 23 rise to clamp the support rods 12 at both ends of the main rod 11 and rotate to shorten the telescopic rod 1 until its two ends are separated from the coal walls on both sides of the branch lane 4, then the second robotic arm 22 and the third robotic arm 23 are separated from the support rods 12 and return to the starting position, and finally the first robotic arm 21 moves the telescopic rod 1 back to the operating platform 31 of the continuous coal miner 3.

[0061] It is understood that in other embodiments, the specific functions of the first robotic arm 21, the second robotic arm 22, and the third robotic arm 23 may be configured in other ways, and the present invention is not limited thereto. For example, in other embodiments, the first robotic arm 21 may be configured to clamp and rotate the main rod 11 to extend or shorten the telescopic rod 1, while the second robotic arm 22 and the third robotic arm 23 may be configured to grasp the movable telescopic rod 1 and the fixed support rod 12.

[0062] Furthermore, the second and third mechanical arms 22 and 23 are each provided with a dynamometer 24. The dynamometer 24 is used to measure and control the torque applied when the second and third mechanical arms 22 and 23 rotate the support rod 12, thereby ensuring that the ends of the telescopic rod 1 can generate sufficient support force on the roof 41 when they are tightened against the coal walls on both sides of the branch tunnel 4.

[0063] Furthermore, a remote controller is included, which is used to control the first robotic arm 21, the second robotic arm 22, and the third robotic arm 23. By providing a remote controller to remotely control the first robotic arm 21, the second robotic arm 22, and the third robotic arm 23, this embodiment can minimize manual intervention during the installation and removal of the telescopic rod 1, thereby improving the safety and intelligence of this embodiment.

[0064] Example 2

[0065] The embodiment of the present invention provides a method for supporting a branch tunnel in a continuous mining and continuous filling working face based on the branch tunnel supporting device provided in the first embodiment, comprising the following steps:

[0066] Step 1: The continuous miner 3 starts mining along the branch tunnel 4;

[0067] Step 2: Every time the continuous miner 3 advances a certain distance, the robotic arm 2 grabs a telescopic rod 1 from the operating platform 31 to support the roof 41 above the branch tunnel 4 where the coal has been mined, until the continuous miner 3 digs through the branch tunnel 4 and completes the coal mining operation;

[0068] Specifically, the method in which the robot arm 2 grabs a telescopic rod 1 to support the roof 41 above the branch tunnel 4 where coal mining has been completed is as follows:

[0069] The first robotic arm 21 first grabs a telescopic rod 1 from the operating platform 31 and moves it to the lower side of the roof 41 above the branch tunnel 4 where coal has been mined, and fixes the main rod 11 of the telescopic rod 1. The second robotic arm 22 and the third robotic arm 23 rise and clamp the support rods 12 at both ends of the telescopic rod 1. The second robotic arm 22 and the third robotic arm 23 rotate the support rods 12 so that the two ends of the telescopic rod 1 respectively abut the coal walls on both sides of the branch tunnel 4. The support rods 12 are further rotated until the torque displayed on the dynamometer 24 reaches 200 kN. Then the first robotic arm 21, the second robotic arm 22, and the third robotic arm 23 detach from the telescopic rod 1, and the telescopic rod 1 supports the roof 41 above the branch tunnel 4 where coal has been mined.

[0070] Step 3: When the continuous miner 3 retreats after excavating the branch tunnel 4, each time the continuous miner 3 moves below each telescopic rod 1 supporting the roof 41, the first manipulator 21 and the manipulator 2 remove each telescopic rod 1 and retract it onto the operating platform 31 until the continuous miner 3 completely exits the branch tunnel 4 and retracts all telescopic rods 1;

[0071] Specifically, the method for the robot arm 2 to dismantle each telescopic rod 1 and recycle it onto the operating platform 31 is as follows:

[0072] The first robotic arm 21 grabs and fixes the main rod 11, the second robotic arm 22 and the third robotic arm 23 rise to clamp the support rods 12 at both ends of the main rod 11 and rotate to shorten the telescopic rod 1 until its two ends are separated from the coal walls on both sides of the branch tunnel 4, then the second robotic arm 22 and the third robotic arm 23 separate from the support rod 12 and return to the starting position, finally the first robotic arm 21 moves the telescopic rod 1 back to the operating platform 31 of the continuous coal mining machine 3.

[0073] The continuous mining and filling working face branch tunnel support method provided by the embodiment of the present invention is based on the continuous mining and filling working face branch tunnel support device provided in Example 1. On the one hand, it can improve the support efficiency of the continuous mining and filling working face branch tunnel 4, thereby improving the excavation efficiency of the branch tunnel 4, and further improving the production efficiency of continuous mining and filling; on the other hand, it realizes the recycling and reuse of support materials, thereby reducing the material consumption of the top plate 41 support and the proportion of the support cost in the total cost, thereby improving the economic benefits of continuous mining and filling.

[0074] Finally, it should be noted that 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 they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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 various embodiments of the present invention.

Claims

1. A supporting device for a continuous mining and filling working face, characterized in that: include: A plurality of telescopic rods (1), wherein the plurality of telescopic rods (1) are placed on an operating platform (31) of a continuous coal mining machine (3); A mechanical arm (2), the mechanical arm (2) being arranged on an operating platform (31) of the continuous coal mining machine (3); When the continuous coal mining machine (3) is excavating along the branch tunnel (4), the mechanical arm (2) can grab the telescopic rod (1) to below the top plate (41) at the top of the branch tunnel (4) and extend the telescopic rod (1) until both ends of the telescopic rod (1) support the coal walls on both sides of the branch tunnel (4) to form support for the top plate (41); when the continuous coal mining machine (3) retreats after excavating the branch tunnel (4), the mechanical arm (2) can shorten the telescopic rod (1) below the top plate (41) and grab the telescopic rod (1) back onto the operating platform (31); The telescopic rod (1) comprises a main rod (11) and supporting rods (12) threadedly connected to both ends of the main rod (11); The robotic arm (2) comprises a first robotic arm (21), a second robotic arm (22) and a third robotic arm (23); the second robotic arm (22) and the third robotic arm (23) are respectively arranged on both sides of the first robotic arm (21); the first robotic arm (21), the second robotic arm (22) and the third robotic arm (23) cooperate to grasp, move and extend the telescopic rod (1).

2. The branch tunnel support device for continuous mining and filling working face according to claim 1, characterized in that: One of the main rod (11) and the support rod (12) has an internal thread, and the other has an external thread matching the internal thread. The main rod (11) and the support rod (12) are connected via the internal thread and the external thread.

3. The branch tunnel support device for continuous mining and filling working face according to claim 2, characterized in that: The main rod (11) has a length of 3 to 6 m and a diameter of 5 to 15 cm, the support rod (12) has a length of 1 to 2 m and a diameter of 4 to 14 cm, and the length of the threads on the main rod (11) and the support rod (12) is 1 to 2 m.

4. The branch tunnel support device for continuous mining and filling working face according to claim 1, characterized in that: The second mechanical arm (22) and the third mechanical arm (23) are respectively provided with a dynamometer (24).

5. The branch tunnel support device for continuous mining and filling working face according to claim 1, characterized in that: It also includes a remote controller, which is used to control the first robotic arm (21), the second robotic arm (22) and the third robotic arm (23).

6. A method for supporting branch tunnels in a continuous mining and filling working face, characterized in that: Supporting a branch tunnel by using the branch tunnel support device for a continuous mining and continuous filling working face according to any one of claims 1 to 5 comprises the following steps: The continuous coal mining machine (3) starts to excavate and mine coal along the branch tunnel (4); Each time the continuous miner (3) advances a certain distance, the mechanical arm (2) grabs one of the telescopic rods (1) from the operating platform (31) to support the roof (41) above the branch tunnel (4) where coal mining has been completed, until the continuous miner (3) digs through the branch tunnel (4) and completes the coal mining operation; When the continuous coal mining machine (3) retreats after excavating the branch tunnel (4), each time the continuous coal mining machine (3) moves below each of the telescopic rods (1) supporting the top plate (41), the mechanical arm (2) removes each of the telescopic rods (1) and retracts them onto the operating platform (31), until the continuous coal mining machine (3) completely exits the branch tunnel (4) and retracts all of the telescopic rods (1).

7. The method for supporting branch tunnels in a continuous mining and filling working face according to claim 6, characterized in that: The method in which the mechanical arm (2) grabs one of the telescopic rods (1) to support the roof (41) above the branch tunnel (4) where coal mining has been completed is as follows: The mechanical arm (2) first grabs one of the telescopic rods (1) from the operating platform (31) and moves it to the lower side of the roof (41) above the branch tunnel (4) where coal mining has been completed, and then extends the telescopic rod (1) until both ends of the telescopic rod (1) respectively support the coal walls on both sides of the branch tunnel (4), thereby completing the support of the roof (41) above the branch tunnel (4) where coal mining has been completed.

8. The method for supporting branch tunnels in a continuous mining and filling working face according to claim 6, characterized in that: The method for the mechanical arm (2) to dismantle each telescopic rod (1) and recover it onto the operating platform (31) is as follows: The mechanical arm (2) first grabs and fixes each of the telescopic rods (1) supporting the roof (41), then shortens the telescopic rods (1) to separate the telescopic rods (1) from the coal walls on both sides of the branch tunnel (4), and finally grabs the telescopic rods (1) and places them back on the operating platform (31).

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