Closed wall for gateroads with simultaneous mining and filling and method for constructing the same

Abstract

The application provides a closed wall for continuous mining and filling of a branch roadway and a construction method thereof. The closed wall comprises a supporting body, a baffle and a connecting piece. The supporting body is arranged around the branch roadway. The supporting body comprises a first supporting assembly and a second supporting assembly. The first supporting assembly is arranged on the roof of the branch roadway. The second supporting assembly is arranged on the sidewall of the branch roadway. The top of the baffle is embedded in the first supporting assembly. A plurality of baffles are arranged along the length direction of the branch roadway to form a closed wall body to close the branch roadway. The closed wall body and the branch roadway form a filling space. The connecting piece connects two second supporting assemblies arranged oppositely to reinforce the closed wall body. The first supporting assembly and the second supporting assembly form the supporting part of the baffle. The plurality of baffles can be quickly and conveniently assembled to form the closed wall body. The supporting body, the closed wall body and the connecting piece form a stable closed wall. The construction efficiency of the closed wall is high. The preparation time of filling is effectively reduced. The filling efficiency is improved. The efficient operation of the coal mine production is ensured.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a sealed wall for continuous mining and filling branch roadways and its construction method. Background Technology

[0002] The large-scale development of coal resources has brought about a series of environmental pollution problems. Backfilling mining, which involves filling the goaf with solid waste such as coal gangue, has multiple functions, including controlling surface subsidence, treating solid waste, and protecting water resources, and has broad application prospects.

[0003] During backfilling mining, a sealed wall needs to be constructed at the continuous mining and backfilling face. Current technology primarily uses brick masonry combined with individual reinforcement supports for this purpose. However, this method results in a weak sealed wall with low lateral pressure resistance. Furthermore, transporting the bricks and individual supports requires significant space, leading to low construction efficiency and the need for subsequent individual support erection, making the process complex. Constructing the sealed wall using hydraulic lifting frames and grout baffles requires specialized transport equipment, consuming considerable space and further impacting construction efficiency. This low efficiency in sealing wall construction can cause backfilling to lag behind the coal mining progress, resulting in an imbalance between mining and backfilling operations. Summary of the Invention

[0004] This invention provides a sealed wall for continuous mining and filling roadways and its construction method, in order to solve the problem of low construction efficiency of sealed walls in existing coal mines during continuous mining and filling processes, which leads to an imbalance between coal mining and filling.

[0005] In a first aspect, the present invention provides a sealed wall for a continuous mining and filling branch roadway, comprising: a support body, a baffle, and a connector;

[0006] The support structure is located circumferentially at the entrance of the branch roadway. The support structure includes a first support component and a second support component. The first support component is located on the roof of the branch roadway, and the second support component is located on the sidewall of the branch roadway.

[0007] The top of the baffle is embedded in the first support assembly, and multiple baffles are arranged sequentially along the length of the branch tunnel opening to form a sealed wall to close the branch tunnel opening. The sealed wall and the branch tunnel enclose a filling space.

[0008] The connector connects two opposing second support components to reinforce the sealed wall.

[0009] The application provides a closed wall for a branch roadway in a continuous mining and filling system, wherein the first support assembly comprises a first anchor rod, a first joist and a first fastener, the first joist is provided with a first groove which is opposite to the roof, and the first fastener is used for anchoring the first anchor rod and the first joist to the roof.

[0010] The second support assembly comprises a second anchor rod, a second joist and a second fastener, the second joist is provided with a second groove which is opposite to the sidewall of the roadway, and the second fastener is used for anchoring the second anchor rod and the second joist to the sidewall of the roadway.

[0011] The application provides a closed wall for a branch roadway in a continuous mining and filling system, wherein the side of the closed wall body which faces the filling space is provided with an isolation layer.

[0012] The application provides a closed wall for a branch roadway in a continuous mining and filling system, wherein the connecting piece comprises a steel cable and a tensioning piece.

[0013] The two ends of the steel cable are connected with the two second support assemblies respectively, and the tensioning piece is arranged on the steel cable and used for tensioning the steel cable.

[0014] The application provides a closed wall for a branch roadway in a continuous mining and filling system, wherein a tension detector is arranged on the steel cable and used for detecting the tension of the steel cable.

[0015] In a second aspect, the application provides a construction method of a closed wall for a branch roadway in a continuous mining and filling system, comprising the following steps:

[0016] After the branch roadway is opened, the first support assembly is anchored to the roof of the branch roadway, the second support assembly is anchored to the sidewall of the branch roadway, and the periphery of the branch roadway opening is supported by the first support assembly and the two second support assemblies;

[0017] The end of the baffle plate is embedded in the first support assembly, and a plurality of baffle plates are arranged along the length direction of the branch roadway opening to form a closed wall body, so as to close the branch roadway opening, and the closed wall body and the branch roadway form a filling space.

[0018] The two second support assemblies which are arranged oppositely are connected by the connecting piece, so as to reinforce the closed wall body.

[0019] The application provides a construction method of a closed wall for a branch roadway in a continuous mining and filling system, wherein the step of anchoring the first support assembly to the roof of the branch roadway comprises the following steps:

[0020] The first anchor rod is suspended on the part of the roof which penetrates through the anchor rod hole on the first joist, and the first anchor rod and the first joist are anchored to the roof by the first fastener.

[0021] The step of anchoring the second support assembly to the sidewall of the branch roadway comprises driving a second anchor rod into the sidewall of the branch roadway;

[0022] The second anchor rod is suspended on the part of the sidewall that passes through the anchor rod hole on the second joist, and the second anchor rod and the second joist are anchored to the sidewall by a second fastener.

[0023] According to the construction method of the closed wall of the continuous mining and filling branch roadway provided by the present application, the step of embedding the end of the baffle into the first support assembly and arranging a plurality of baffles along the length direction of the branch roadway opening to form a closed wall body comprises:

[0024] Cutting an isolation film that is suitable for the branch roadway opening, and fixing one end of the isolation film to the first support assembly;

[0025] The end of the baffle abuts against the isolation film, the end of the baffle is embedded into the groove of the first support assembly, and the isolation film is pressed into the groove;

[0026] Placing a plurality of baffles along the length direction of the branch roadway opening in sequence, and abutting against each other between two adjacent baffles.

[0027] According to the construction method of the closed wall of the continuous mining and filling branch roadway provided by the present application, the step of connecting two second support assemblies arranged oppositely by a connecting piece to reinforce the closed wall body comprises:

[0028] Connecting two second support assemblies by a plurality of steel cable ropes in the horizontal direction, or diagonally connecting two second support assemblies;

[0029] Tightening the steel cable ropes by a tensioning piece.

[0030] According to the construction method of the closed wall of the continuous mining and filling branch roadway provided by the present application, after the step of connecting two second support assemblies arranged oppositely by a connecting piece to reinforce the closed wall body, further comprising:

[0031] Filling the filling space with filling slurry;

[0032] After the filling slurry solidifies, disassembling the connecting piece and a plurality of baffles.

[0033] The application provides a closed wall for a branch roadway and a construction method thereof, a first supporting component fixed to a roof and a second supporting component on a roadway side form a supporting part of a plurality of baffle plates, the plurality of baffle plates can be quickly and conveniently assembled to form a closed wall body, the supporting body, the closed wall body and a connecting piece form a stable closed wall, the closed wall is constructed quickly, the preparation time of filling is effectively reduced, and then the filling efficiency is improved, and efficient operation of coal mine production is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a structural schematic view of the closed wall provided by the application (partial view of a branch roadway);

[0036] Figure 2 It is a structural schematic view of the baffle plate provided by the application;

[0037] Figure 3 It is a side view of the first joist provided by the application;

[0038] Figure 4 It is a side view of the second joist provided by the application;

[0039] Figure 5 It is a structural schematic view of the connecting piece provided by the application;

[0040] The drawings show that: 1 is a branch roadway; 2 is a first supporting component; 21 is a first anchor rod; 22 is a first joist; 221 is a first connecting ring; 23 is a first fastener; 3 is a second supporting component; 31 is a second anchor rod; 32 is a second joist; 321 is a second connecting ring; 33 is a second fastener; 4 is a baffle plate; 41 is a through hole; 5 is a connecting piece; 51 is a steel cable; 52 is a connecting hook; 53 is a tensioner; 54 is a tension detector. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the application more clear, the technical solutions in the application will be described clearly and completely in combination with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The present application will be described below Figures 1 to 5 The present application provides a sealing wall for continuous mining and filling of a branch roadway.

[0044] As Figure 1 The present application provides a sealing wall for continuous mining and filling of a branch roadway, which comprises a supporting body, a plurality of baffle plates 4 and a connecting piece 5. The supporting body is arranged around the branch roadway opening 1 and comprises a first supporting assembly 2 and a second supporting assembly 3. The first supporting assembly 2 is arranged on the roof of the branch roadway, and the second supporting assembly 3 is arranged on the sidewall of the branch roadway. The top of each baffle plate 4 is embedded in the first supporting assembly 2. The baffle plates 4 are arranged in sequence along the length direction of the branch roadway opening 1 to form a sealing wall body, so as to close the branch roadway opening 1. The sealing wall body and the branch roadway form a filling space. The connecting piece 5 connects two oppositely arranged second supporting assemblies 3 to reinforce the sealing wall body.

[0045] Specifically, the sealing wall is constructed at the branch roadway opening 1 of the coal mine continuous mining and filling branch roadway. The sealing wall can close the branch roadway opening 1 after mining. The sealing wall and the mined-out branch roadway form a filling space. The filling space is filled with filling slurry. After the filling slurry solidifies, it can effectively support the mined-out area.

[0046] The sealing wall comprises a supporting body, a plurality of baffle plates 4 and a connecting piece 5. Before the branch roadway is mined, the surrounding rock around the branch roadway opening 1 is supported by the supporting body. The supporting body comprises a first supporting assembly 2 and two second supporting assemblies 3. The first supporting assembly 2 is anchored to the roof of the branch roadway, and the second supporting assembly 3 is anchored to the sidewall of the branch roadway. The two second supporting assemblies 3 are symmetrically arranged. The first supporting assembly 2 can be composed of a plurality of anchor rods and a joist. The joist has a groove, and one end of the baffle plate 4 can be embedded in the groove. The groove limits and supports the baffle plate 4, which is conducive to the assembly of the plurality of baffle plates 4. The second supporting assembly 3 can also be composed of a plurality of anchor rods and a joist.

[0047] The first support component 2 and two second support components 3 are anchored to the surrounding rock at the entrance 1 of the branch tunnel. During the mining of the branch tunnel, the support structure provides support to the surrounding rock at the entrance 1. After the branch tunnel is mined, the first support component 2 and the second support components 3 can be used as part of the structure for constructing a sealed wall. The first support component 2 has a groove, the length of which is consistent with the length of the entrance 1. The thickness of the baffle 4 is adapted to the width of the groove, and the end of the baffle 4 can be embedded in the groove. The length of the baffle 4 is adapted to the height of the entrance 1, and the width of the baffle 4 is set according to requirements. The baffle 4 can be made of materials with a certain strength, such as wood or steel plates.

[0048] Multiple baffles 4 are placed sequentially along the length of the branch tunnel entrance 1. The top of the baffle 4 is embedded in the groove of the first support component 2. During the assembly process, pressure is applied to the baffle 4 so that adjacent baffles 4 press against each other. Multiple baffles 4 are arranged sequentially to form a sealed wall. The assembly of the sealed wall is quick.

[0049] After the sealed wall is assembled, the two second support components 3 anchored to the sidewall are connected by connectors 5. The connectors 5 can be ropes, etc. The number of connectors 5 is set according to the size of the side entrance 1. Multiple connectors 5 form a mesh structure to strengthen the compressive strength of the sealed wall.

[0050] The support structure, sealed wall, and connectors 5 constitute a stable sealed wall, which, together with the mined-out branch tunnel, forms a filling space. For example... Figure 1 and Figure 2 As shown, it can be understood that at least two baffles 4 are provided with through holes 41, through which filling slurry is injected into the filling space, and through another through hole 41 is used to install an exhaust pipe.

[0051] After the filling grout solidifies, the connector 5 and multiple baffles 4 can be disassembled. The disassembled baffles 4 and connector 5 can be used in the construction of the sealing wall of the next branch tunnel. The first support assembly 2 and the second support assembly 3 are retained in the surrounding rock at the entrance of the branch tunnel 1 to continue supporting the branch tunnel.

[0052] In this embodiment of the invention, the first support component 2 fixed on the roof and the second support component 3 on the roadway side constitute the support part of multiple baffles 4. Multiple baffles 4 can be quickly and conveniently assembled to form a sealed wall. The support body, the sealed wall and the connector 5 form a stable sealed wall. The construction efficiency of the sealed wall is fast, which effectively reduces the filling preparation time, thereby helping to improve the filling efficiency and ensure the efficient operation of coal mine production.

[0053] like Figure 1As shown, in an optional embodiment, the first support assembly 2 includes a first anchor bolt 21, a first support beam 22, and a first fastener 23. The first support beam 22 has a first groove that is opposite to the roof. The first fastener 23 anchors the first anchor bolt 21 and the first support beam 22 to the roof. The second support assembly 3 includes a second anchor bolt 31, a second support beam 32, and a second fastener 33. The second support beam 32 has a second groove that is opposite to the roadway side. The second fastener 33 anchors the second anchor bolt 31 and the second support beam 32 to the roadway side.

[0054] Specifically, such as Figure 1 and Figure 3 As shown, the first support assembly 2 includes a first anchor bolt 21, a first support beam 22, and a first fastener 23. Multiple first anchor bolts 21 are anchored at intervals within the roof slab along the length of the branch tunnel entrance 1, with portions of the first anchor bolts 21 protruding beyond the roof slab. The first support beam 22 is made of channel steel, with dimensions set according to actual needs. For example, the channel width, depth, and thickness are 150mm, 150mm, and 10mm respectively. The baffle 4 is 150mm thick and can be embedded in the channel steel's groove. The groove of the first support beam 22 is defined as the first groove. Anchor bolt holes are provided on the bottom wall of the first support beam 22. The first support beam 22 is placed at the installation position on the roof slab of the branch tunnel entrance 1, with the groove facing downwards and the first groove facing away from the roof slab. The portions of the first anchor bolts 21 protruding beyond the roof slab pass through the anchor bolt holes on the first support beam 22, and then the first fastener 23 is installed. The first fastener 23 includes accessories such as an anchor plate, a self-aligning ball washer, and nuts. The first anchor 21 and the first support beam 22 are anchored to the top plate by the first fastener 23 and pre-tightened to a preset torque.

[0055] like Figure 1 and Figure 4 As shown, the second support component 3 includes second anchor bolts 31, a second support beam 32, and a second fastener 33. Multiple second anchor bolts 31 are anchored at intervals along the height direction of the branch roadway 1 within the roadway wall, with portions of the second anchor bolts 31 protruding outside the roadway wall. The second support beam 32 is made of channel steel, and the dimensions of the channel steel are set according to actual needs. For example, the channel width, depth, and thickness of the channel steel are 150mm, 150mm, and 10mm, respectively. The groove of the second support beam 32 is defined as the second groove. Anchor bolt holes are provided on the bottom wall of the second support beam 32. The second support beam 32 is placed at the installation position on the roadway wall of the branch roadway 1, with the bottom wall of the second support beam 32 fitting against the roadway wall, and the second groove facing away from the roadway wall. The portions of the second anchor bolts 31 protruding from the roadway wall pass through the anchor bolt holes on the second support beam 32, and then the second fastener 33 is installed. The second fastener 33 includes accessories such as an anchor plate, a self-aligning ball washer, and nuts. The second anchor 31 and the second support beam 32 are anchored to the roadway side by the second fastener 33 and pre-tightened to a preset torque.

[0056] The first support component 2 is anchored to the roof of the branch roadway entrance 1, and the two second support components 3 are anchored to the roadway sides of the branch roadway entrance 1 respectively. During the mining process, the first support component 2 and the second support component 3 provide effective support for the branch roadway. After the branch roadway is mined, the slots of the first support component 2 and the slots of the second support component 3 form the support part of the baffle 4, which facilitates the rapid assembly of multiple baffles 4, thereby facilitating the rapid construction of the sealed wall and reducing the preparation time for backfilling. After the backfill grout solidifies, the first support component 2 and the second support component 3 can remain in the surrounding rock to continue to provide support for the mined branch roadway.

[0057] In this embodiment of the invention, the support body composed of the first support component 2 and the second support component 3 plays an effective supporting role in the branch roadway during the branch roadway mining process; after the branch roadway is mined, it is conducive to the rapid construction of the sealing wall, reduces the preparation time for filling, and improves the filling efficiency; after the filling grout solidifies, it remains in the surrounding rock and continues to play a supporting role in the branch roadway after mining.

[0058] In an optional embodiment, an isolation layer is provided on the side of the sealed wall facing the filling space.

[0059] Specifically, before assembling the baffle 4, a release agent can be applied to one side of the baffle 4. After multiple baffles 4 are assembled, the release agent on the baffle 4 forms an isolation layer. It can be understood that the isolation layer is opposite to the filling space. After the filling grout in the filling space solidifies, the isolation layer facilitates the separation of the baffle 4 from the filling body and facilitates the disassembly of the sealed wall.

[0060] Alternatively, before assembly, cut a piece of isolation membrane that matches the dimensions of branch tunnel entrance 1. The isolation membrane can be made of plastic film, and its length and width should be approximately 1 meter greater than the length and height of branch tunnel entrance 1. For example, if the length and height of branch tunnel entrance 1 are 5600mm and 3500mm respectively, the length and width of the isolation membrane should be 6600mm and 4500mm respectively. Fix one end of the isolation membrane to the first support component 2, such as... Figure 3 As shown, for example, a plurality of first connecting rings 221 are provided on one side wall of the first support beam 22, through which the isolation membrane is suspended on the first support beam 22. When installing the baffle 4, one end of the baffle 4 presses the isolation membrane into the groove of the first support beam 22, and the other end of the baffle 4 also presses the isolation membrane. When installing the first baffle 4, the first baffle 4 is simultaneously embedded in the groove of the first support beam 22 and the groove of the second support beam 32, that is, the first baffle 4 also presses the isolation membrane into the groove of the second support beam 32. After the multiple baffles 4 are assembled to form a sealed wall, the isolation membrane separates the sealed wall from the filling space. After the filling grout solidifies, it is convenient to disassemble the multiple baffles 4.

[0061] like Figure 1 and Figure 5As shown in the optional embodiment, the connecting member 5 comprises a steel cable 51 and a tensioning member; two ends of the steel cable 51 are connected with two second support assemblies 3 respectively, and the tensioning member is arranged on the steel cable 51 for tensioning the steel cable 51.

[0062] Specifically, as shown in the optional embodiment, Figure 4 As shown, a plurality of second connecting rings 321 are arranged on one side wall of the second joist 32 at intervals, and the notches of the two second joists 32 are opposite to each other. The connecting member 5 comprises a steel cable 51, both ends of the steel cable 51 are provided with a connecting hook 52, and the tensioning member can be a tensioner 53 which is arranged on the steel cable 51.

[0063] The connecting hook 52 at one end of the steel cable 51 is connected with a second connecting ring 321 on one of the second joists 32, the connecting hook 52 at the other end of the steel cable 51 is connected with a second connecting ring 321 on the other second joist 32, and the steel cable 51 is tensioned by the tensioner 53. The steel cable 51 connects the two second joists 32 in a diagonal line, or the steel cable 51 connects the two second joists 32 in a direction perpendicular to the second joist 32, and a plurality of steel cables 51 form a net structure, which can effectively support the sealing wall.

[0064] After the filling slurry in the filling space is solidified, the steel cable 51 is in a relaxed state by the tensioner 53, so that the steel cable 51 can be easily taken off from the two second joists 32, and the installation and disassembly of the steel cable 51 are convenient. The disassembled connecting member 5 can be used for the construction of the sealing wall of the next branch roadway.

[0065] In the embodiment of the application, the two second joists 32 are connected by the steel cable 51, and the steel cable 51 is tensioned by the tensioning member, so that the connecting member 5 can effectively support the sealing wall, and the installation and disassembly of the connecting member 5 are convenient, and the recycling can be realized.

[0066] As shown in the optional embodiment, Figure 5 As shown in the optional embodiment, a tension detector 54 is arranged on the steel cable 51 for detecting the tension of the steel cable 51.

[0067] Specifically, the tension detector 54 is arranged on the steel cable 51 for detecting the tension of the steel cable 51. During the process of injecting the filling slurry into the filling space, as the filling slurry is continuously accumulated, the filling slurry exerts a lateral pressure on the sealing wall, and the increase of the lateral pressure causes the steel cable 51 to be continuously tightened, and the tension of the steel cable 51 gradually increases. When the tension of the steel cable 51 is greater than a warning tension, it indicates that the strength of the current sealing wall cannot resist the pressure exerted by the filling slurry, at this time, the sealing wall can be reinforced by increasing the inclined support to ensure the safety of the filling work.

[0068] In this embodiment of the invention, a tension detector 54 is provided on the steel cable 51. During the filling process, the tension detector 54 can detect the tension on the steel cable 51. When the tension on the steel cable 51 is greater than the warning tension, the sealed wall can be reinforced by adding oblique supports or other means to ensure the safety of the filling work.

[0069] This invention also provides a method for constructing a sealed wall for a continuous mining and filling branch roadway, comprising:

[0070] After the branch roadway opens, the first support component 2 is anchored to the roof of the branch roadway, and the second support component 3 is anchored to the sidewall of the branch roadway. The first support component 2 and the two second support components 3 provide circumferential support for the branch roadway opening 1.

[0071] The end of the baffle 4 is embedded into the first support component 2, and multiple baffles 4 are arranged sequentially along the length of the branch tunnel 1 to form a sealed wall to close the branch tunnel 1. The sealed wall and the branch tunnel enclose a filling space.

[0072] Two opposing second support components 3 are connected by connector 5 to reinforce the sealed wall.

[0073] Specifically, such as Figure 1 Figure 1 As shown, after the branch tunnel opens, the first support component 2 is anchored to the roof of the branch tunnel entrance 1, and the second support component 3 is anchored to the sidewall of the branch tunnel entrance 1. The two second support components 3 are symmetrically arranged, and the surrounding rock at the branch tunnel entrance 1 is supported by the first support component 2 and the second support component 3. After the branch tunnel is mined, a sealed wall is constructed. The first support component 2 and the two second support components 3 enclose the installation space for multiple baffles 4, and at the same time, the first support component 2 and the two second support components 3 constitute the support part for multiple baffles 4.

[0074] One end of the baffle 4 is embedded into the groove of the first support component 2, with the baffle 4 placed vertically. During installation, the top of the first baffle 4 is embedded into the groove of the first support component 2, and simultaneously, the first baffle 4 is embedded into the groove of the second support component 3. Then, multiple baffles 4 are embedded one by one into the groove of the first support component 2, and lateral pressure is applied to the baffles 4 so that adjacent baffles 4 can press against each other until the branch tunnel entrance 1 is completely sealed, and the multiple baffles 4 form a sealed wall. The tops of the two baffles 4 located in the middle area are provided with through holes 41. One through hole 41 is used to fill the filling space with filling slurry, and the other through hole 41 is used to install an exhaust pipe.

[0075] Both ends of the connector 5 are connected to two second support components 3 respectively. The connector 5 can be a rope and is detachably connected to the second support components 3. The number of connectors 5 is set according to actual needs, and multiple connectors 5 can reinforce the sealed wall.

[0076] The first support component 2, the second support component 3, the sealed wall and the connector 5 constitute a stable sealed wall. The sealed wall has high construction efficiency and rapid construction, which effectively reduces the filling preparation time, thereby improving the filling efficiency and ensuring the efficient operation of coal mine production.

[0077] In an optional embodiment, the step of anchoring the first support component 2 to the roof of the branch tunnel includes: driving the first anchor bolt 21 into the roof of the branch tunnel.

[0078] The portion of the first anchor rod 21 that protrudes from the top plate passes through the anchor rod hole on the first support beam 22, and the first anchor rod 21 and the first support beam 22 are anchored to the top plate by the first fastener 23;

[0079] The steps of anchoring the second support component 3 to the sidewall of the branch roadway include: driving the second anchor bolt 31 into the sidewall of the branch roadway;

[0080] The portion of the second anchor rod 31 that protrudes from the roadway side passes through the anchor rod hole on the second support beam 32, and the second anchor rod 31 and the second support beam 32 are anchored to the roadway side by the second fastener 33.

[0081] Specifically, taking the length and height of the branch tunnel entrance 1 as an example, which are 5600mm and 3500mm respectively, the first support beam 22 can be formed by splicing two channel steels with a length of 2800mm. The channel width, depth, and thickness of the first support beam 22 are 150mm, 150mm, and 10mm respectively. The dimensions of the baffle 4 are set according to actual needs. For example, the length, width, and thickness of the baffle 4 are 3500mm, 400mm, and 150mm respectively, and the baffle 4 can be embedded in the slot of the first support beam 22.

[0082] Anchor bolt holes are provided on the bottom wall of the first support beam 22, and the diameter of the anchor bolt holes matches that of the first anchor bolt 21. First, multiple first anchor bolts 21 are anchored at intervals within the roof slab along the length of the branch tunnel entrance 1, with the ends of the first anchor bolts 21 protruding outside the roof slab. Then, the first support beam 22 is placed at its installation position on the roof slab of the branch tunnel entrance 1, with the bottom wall of the first support beam 22 fitting against the roof slab, the slot facing downwards. The portion of the first anchor bolt 21 protruding from the roof slab passes through the anchor bolt holes on the first support beam 22. Finally, the first fastener 23 is installed. The first fastener 23 includes accessories such as an anchor bolt tray, a self-aligning ball washer, and a nut. The first fastener 23 anchors the first anchor bolt 21 and the first support beam 22 to the roof slab and pre-tightens them to a preset torque.

[0083] The second joist 32 can also be formed by splicing multiple channel steels. The width, depth and thickness of the channel of the second joist 32 are 150 mm, 150 mm and 10 mm respectively. The bottom wall of the second joist 32 is provided with an anchor rod hole matching the diameter of the second anchor rod 31. The multiple second anchor rods 31 are first anchored in the roadway side in the height direction of the branch roadway opening 1, and the end portions of the second anchor rods 31 are suspended outside the roadway side. Then, the second joist 32 is placed at the installation position of the roadway side of the branch roadway opening 1, the bottom wall of the second joist 32 is attached to the roadway side of the branch roadway, the portions of the second anchor rods 31 suspended outside the roadway side are arranged through the anchor rod holes of the second joist 32, and then the second fastener 33 is installed. The second fastener 33 includes an anchor rod tray, a trunnion ball pad and a nut and other accessories, and the second anchor rods 31 and the second joist 32 are anchored to the roadway side by the second fastener 33 and are pre-tightened to a preset torque.

[0084] In the embodiment of the present application, the multiple first anchor rods 21 and the first joist 22 effectively guarantee the strength of the roof of the branch roadway, and the multiple second anchor rods 31 and the second joist 32 effectively guarantee the strength of the roadway side of the branch roadway. The notches of the first joist 22 and the notches of the second joist 32 constitute the support portion, which is beneficial to the convenience of assembling the multiple baffle plates 4 and is also beneficial to enhancing the stability of the sealing wall.

[0085] In the optional embodiment, the steps of embedding the end portion of the baffle plate 4 into the first support assembly 2 and arranging the multiple baffle plates 4 along the length direction of the branch roadway opening 1 to form the sealing wall body include:

[0086] cutting the isolation film to match the branch roadway opening 1, and fixing one end of the isolation film to the first support assembly 2;

[0087] abutting the end portion of the baffle plate 4 against the isolation film, embedding the end portion of the baffle plate 4 into the groove of the first support assembly 2, and pressing the isolation film into the groove;

[0088] sequentially placing the multiple baffle plates 4 along the length direction of the branch roadway opening 1, and abutting the adjacent two baffle plates 4 against each other.

[0089] Specifically, the isolation film is cut to a suitable size according to the size of the branch roadway opening 1. The length of the isolation film is greater than the length of the branch roadway opening 1, and the width of the isolation film is greater than the height of the branch roadway opening 1. For example, the length and the height of the branch roadway opening 1 are 5600 mm and 3500 mm respectively, and the length and the width of the cut isolation film are 6600 mm and 4500 mm respectively.

[0090] A plurality of first connecting rings 221 are installed on one side wall of the first joist 22 at intervals, and the isolation film is hung at the branch roadway 1 through the plurality of first connecting rings 221. After the isolation film is fixed, the baffle 4 is installed. When the baffle 4 is installed, the top of the baffle 4 presses the isolation film into the notch of the first joist 22, and the top of the baffle 4 is embedded in the notch of the first joist 22. When the first baffle 4 is installed, the first baffle 4 is embedded in the notch of the first joist 22 and the notch of the second joist 32 at the same time, that is, the first baffle 4 also presses the isolation film into the notch of the second joist 32.

[0091] The baffle 4 is vertically placed, the top of the baffle 4 is embedded in the notch of the first joist 22, and the isolation film is pressed into the notch of the first joist 22, and the bottom of the baffle 4 presses the isolation film. A plurality of baffles 4 are sequentially embedded in the notch of the first joist 22, a lateral force is applied to the baffle 4, so that the two adjacent baffles 4 abut against each other, and the plurality of baffles 4 are assembled to form a closed wall, and the isolation film separates the closed wall from the filling space. During the assembly of the plurality of baffles 4, two baffles 4 provided with through holes 41 are installed in the middle region, which facilitates the flow and diffusion of the filling slurry in the filling space, and facilitates the arrangement of the exhaust pipeline.

[0092] The isolation film can effectively seal the gap of the closed wall, and the filling slurry will not leak out of the gap during the filling process, avoiding the phenomenon of slurry running. After the filling slurry solidifies, the baffle 4 will not be bonded with the filling slurry, and the isolation film is beneficial to the disassembly of the plurality of baffles 4.

[0093] In an optional embodiment, the step of reinforcing the closed wall by connecting the two oppositely arranged second support assemblies 3 through the connecting piece 5 comprises:

[0094] The two second support assemblies 3 are connected in a diagonal direction by a plurality of steel cables 51, or are connected diagonally;

[0095] The steel cable 51 is tensioned by the tensioning piece.

[0096] Specifically, the two second support assemblies 3 are connected in a diagonal line. A plurality of second connecting rings 321 are installed on one side wall of the second joist 32 at intervals, and the two ends of the steel cable 51 are provided with connecting hooks 52. The connecting hook 52 at one end of the steel cable 51 is connected with the second connecting ring 321 at the top of one second joist 32, and the connecting hook 52 at the other end of the steel cable 51 is connected with the second connecting ring 321 at the bottom of the other second joist 32. The two second joists 32 are connected in a diagonal line by the two steel cables 51.

[0097] Then two second joists 32 are connected by a plurality of steel cables 51 arranged in horizontal direction, and the number of steel cables 51 arranged in horizontal direction is set according to actual requirements. For example, one steel cable 51 is arranged at the top, middle position and bottom of the sealed wall.

[0098] After the connecting hooks 52 at both ends of the steel cable 51 are connected with the second connecting rings 321 on the two second joists 32, the steel cable 51 is tensioned by the tensioner 53, so that the steel cable 51 is in a suitable tension state. The diagonally arranged steel cable 51 and the plurality of steel cables 51 arranged in horizontal direction form a mesh structure, which effectively guarantees the stability of the sealed wall. The steel cable 51 is provided with a tension detector 54, which can detect the tension of the steel cable 51.

[0099] After the sealed wall is constructed, the sealed wall and the inside of the mined-out branch roadway are enclosed to form a filling space, and the filling slurry is filled into the filling space through the through holes 41 in the baffle 4. During the filling process, the tension detector 54 detects the tension of the steel cable 51 in real time. When the tension of the steel cable 51 is greater than the early warning tension, it indicates that the strength of the current sealed wall cannot resist the lateral pressure exerted by the filling slurry, at which time the sealed wall can be reinforced by increasing the inclined support to ensure the safety of the filling work.

[0100] After the filling work is completed, the steel cable 51 is removed from the two second joists 32 after the filling slurry solidifies. The steel cable 51 is connected with the second connecting ring 321 on the second joist 32 through the connecting hook 52, and the installation and disassembly of the steel cable 51 are convenient. After the plurality of steel cables 51 are removed, the plurality of baffles 4 are sequentially disassembled. The disassembled steel cable 51 and baffle 4 can be used for the construction of the sealed wall of the next branch roadway, and the recycling of the steel cable 51 and the baffle 4 is conducive to reducing the construction cost of the sealed wall.

[0101] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions described in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A sealed wall for continuous mining and filling branch roadways, characterized in that, include: Support structure, baffles, and connectors; The support structure is located circumferentially at the entrance of the branch roadway. The support structure includes a first support component and a second support component. The first support component is located on the roof of the branch roadway, and the second support component is located on the sidewall of the branch roadway. The top of the baffle is embedded in the first support assembly, and multiple baffles are arranged sequentially along the length of the branch tunnel opening to form a sealed wall to close the branch tunnel opening. The sealed wall and the branch tunnel enclose a filling space. The connector connects two opposing second support components to reinforce the sealed wall; the first support component includes a first anchor rod, a first support beam, and a first fastener, the first support beam having a first groove that is opposite to the top plate, and the first fastener anchoring the first anchor rod and the first support beam to the top plate. The second support assembly includes a second anchor bolt, a second support beam, and a second fastener. The second support beam has a second groove that is opposite to the roadway wall. The second fastener anchors the second anchor bolt and the second support beam to the roadway wall. There are multiple connectors, and the multiple connectors form a mesh structure; The connector includes a steel cable and a tensioning element; The two ends of the steel cable are respectively connected to two second support components, and the tensioning member is provided on the steel cable for tensioning the steel cable.

2. The sealed wall for continuous mining and filling branch roadways according to claim 1, characterized in that, The sealed wall has an isolation layer on the side facing the filling space.

3. The sealed wall for continuous mining and filling branch roadways according to claim 1, characterized in that, The steel cable is equipped with a tension tester to detect the tension applied to the steel cable.

4. A method for constructing a sealed wall for a continuous mining and filling branch roadway, the method being used to construct a sealed wall for a continuous mining and filling branch roadway as described in any one of claims 1 to 3, characterized in that, include: After the branch roadway opens, the first support component is anchored to the roof of the branch roadway, and the second support component is anchored to the sidewall of the branch roadway. The first support component and the two second support components provide circumferential support for the branch roadway opening. The end of the baffle is embedded into the first support assembly, and multiple baffles are arranged sequentially along the length of the branch tunnel opening to form a sealed wall to close the branch tunnel opening. The sealed wall and the branch tunnel enclose a filling space. The two second support components, which are arranged opposite each other, are connected by connectors to reinforce the sealed wall.

5. The method for constructing a sealed wall for a continuous mining and filling branch roadway according to claim 4, characterized in that, The step of anchoring the first support component to the roof of the branch tunnel includes: driving the first anchor rod into the roof of the branch tunnel; The portion of the first anchor rod that protrudes from the top plate passes through the anchor rod hole on the first support beam, and the first anchor rod and the first support beam are anchored to the top plate by the first fastener; The step of anchoring the second support component to the sidewall of the branch roadway includes: driving the second anchor rod into the sidewall of the branch roadway; The portion of the second anchor rod that protrudes from the roadway wall passes through the anchor rod hole on the second support beam, and the second anchor rod and the second support beam are anchored to the roadway wall using the second fastener.

6. The method for constructing a sealed wall for a continuous mining and filling branch roadway according to claim 4, characterized in that, The step of embedding the end of the baffle into the first support assembly and arranging the plurality of baffles sequentially along the length direction of the branch tunnel entrance to form a sealed wall includes: Cut an isolation membrane to fit the branch tunnel entrance, and fix one end of the isolation membrane to the first support assembly; The end of the baffle is brought into contact with the isolation membrane, the end of the baffle is embedded in the groove of the first support assembly, and the isolation membrane is pressed into the groove; Multiple baffles are placed sequentially along the length of the branch tunnel entrance, with adjacent baffles abutting against each other.

7. The method for constructing a sealed wall for a continuous mining and filling branch roadway according to claim 4, characterized in that, The step of connecting the two opposing second support components via connectors to reinforce the sealed wall includes: Two second support components are connected horizontally by multiple steel cables, or two second support components are connected diagonally. The steel cable is tensioned by a tensioning element.

8. The method for constructing a sealed wall for a continuous mining and filling branch roadway according to claim 4, characterized in that, The process of connecting two opposing second support components via connectors to reinforce the sealed wall further includes: Fill the filling space with filling slurry; After the filling grout has solidified, the connector and the multiple baffles are disassembled.

Images