Gob-side entry retaining filling device

Abstract

The utility model relates to the technical field of gob treatment, and provides a gob-side entry retaining filling device which comprises a filling pressure-bearing body, a material injection assembly and at least one telescopic bearing assembly arranged in a filling bag side by side. The filling pressure-bearing main body comprises a filling bag, a bottom reinforcing piece arranged on the bottom surface of the filling bag and a top reinforcing piece arranged on the top surface of the filling bag; the telescopic bearing assembly comprises a lower barrel arranged on the bottom reinforcing piece and an upper barrel arranged on the top reinforcing piece, the lower barrel and the upper barrel are in sliding connection, and a discharging opening is formed in the upper portion of the upper barrel; the material injection assembly penetrates through the filling bag and is connected to the lower barrel. Slurry is injected into the lower barrel body through the material injection assembly, the upper barrel body is driven to move upwards, so that the top reinforcing piece abuts against a roadway top plate of a space to be subjected to roadway retaining, and under the action of the bottom reinforcing piece and the top reinforcing piece, it is guaranteed that the top face of a filling bag is in contact with the top and the bottom face of the filling bag is in contact with the bottom in a balanced mode. Therefore, gap air leakage caused by untight roof contact is avoided, and the working intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of goaf area management, in particular to a goaf-side lane filling device. Background Art

[0002] The goaf-retaining technology is to retain the original goaf position along the edge of the goaf, and use certain technical means to maintain the original mining goaf along the edge of the goaf behind the coal mining face. The goaf-retaining technology recycles the safety coal pillars in traditional mining, and re-supports the goaf of the previous section for use in the next section, while maximizing the recovery of resources and reducing the loss rate of coal.

[0003] In the prior art, the side support of the tunnel along the gob retaining tunnel is built manually with bricks. However, the side support formed by the manual brick masonry is not fully connected to the top, which is prone to air leakage through gaps, and the workload of brick transportation and masonry is large, thereby increasing the work intensity. Utility Model Content

[0004] The utility model provides a filling device for a gob-side tunnel, which is used to solve the defects in the prior art that the tunnel side supporting body is not tightly connected to the top, which easily causes air leakage through gaps and has high working intensity.

[0005] The utility model provides a filling device for retaining a tunnel along a goaf, comprising:

[0006] A filling pressure-bearing body, comprising a filling bag, a bottom reinforcement member arranged on the bottom surface of the filling bag, and a top reinforcement member arranged on the top surface of the filling bag, wherein the upper portion of the filling bag has an exhaust port;

[0007] At least one telescopic bearing assembly is arranged side by side in the filling bag, the telescopic bearing assembly comprises a lower cylinder arranged on the bottom reinforcement and an upper cylinder arranged on the top reinforcement, the lower cylinder and the upper cylinder are slidably connected, and the upper part of the upper cylinder has a discharge port;

[0008] The material injection assembly is passed through the filling bag and connected to the lower cylinder.

[0009] According to an embodiment of the utility model, a filling device for retaining a tunnel along the goaf is provided, which also includes a flexible restraining member arranged on the outside of the filling bag.

[0010] According to a gob-side tunnel-retaining filling device provided in an embodiment of the utility model, the flexible restraining member comprises a flexible net arranged on the outer surface of the filling bag.

[0011] According to a filling device for gob-side tunnel retaining provided by an embodiment of the utility model, the top reinforcement member is provided with an installation opening, the filling bag is provided with a placement opening corresponding to the installation opening, and the placement opening is provided with a placement opening sealing cloth cylinder;

[0012] The top of the upper cylinder is provided with an auxiliary connecting component overlapping the mounting opening;

[0013] The lower cylinder is detachably connected to the bottom support restraining and limiting component on the bottom reinforcement.

[0014] According to a gob-side lane retaining filling device provided in an embodiment of the utility model, the auxiliary connecting component comprises an upper support plate and an auxiliary connecting piece, the upper support plate is arranged on the top surface of the upper cylinder, the auxiliary connecting piece is movably connected to the upper support plate, and the auxiliary connecting piece is used to overlap the top reinforcement piece;

[0015] The bottom support constraint and limiting component includes a lower support plate, on which a support constraint is arranged, and the lower cylinder is arranged on the support constraint, and the support constraint is used to keep the lower cylinder in a vertical state at all times during the grouting process.

[0016] According to a gob-side tunnel filling device provided in an embodiment of the utility model, the injection assembly comprises:

[0017] A material injection pipe, which is inserted into the filling bag, and the outlet end of the material injection pipe is connected with the inner cavity of the lower cylinder;

[0018] A quick-connect component, detachably connected to the inlet end of the injection pipe;

[0019] The filling bag has a material injection port for the material injection pipe to pass through, and the material injection port is provided with a material injection port sealing cloth cylinder located outside the quick plug-in component.

[0020] According to a filling device for retaining a lane along a goaf provided by an embodiment of the utility model, the discharge port is provided with a pressure check valve, and / or,

[0021] The exhaust port is provided with an exhaust diaphragm.

[0022] According to a filling device for gob-side tunnel retention provided by an embodiment of the utility model, a flexible reinforcement layer is provided at the matching position between the filling bag and the edge of the bottom reinforcement member and / or at the matching position between the filling bag and the edge of the top reinforcement member.

[0023] According to a gob-side entry retaining filling device provided in an embodiment of the utility model, the bottom reinforcement member and / or the top reinforcement member adopts a rib mesh structure, and / or,

[0024] The filling bag is a canvas bag, which is a closed cube, rectangular parallelepiped, cylindrical structure or a combination of at least two of them.

[0025] The filling device for leaving lanes along the empty space provided by the embodiment of the utility model injects slurry into the lower cylinder through the injection assembly, drives the upper cylinder to move upward, until the top reinforcement connected to the upper cylinder abuts against the roof of the lane in the space to be left, and then the slurry overflows into the filling bag through the discharge port of the upper cylinder until the slurry fills the filling bag. It can be seen that under the action of the bottom reinforcement and the top reinforcement, it can be ensured that the top surface of the filling bag and the bottom surface of the filling bag are balanced, thereby avoiding air leakage due to the gap caused by the loose connection, and only by injecting grout into the telescopic bearing assembly through the injection assembly, the top surface of the filling bag is moved upward under the drive of the upper cylinder, which is easy to operate, thereby reducing the work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of the gob-side tunnel retaining filling device provided in the embodiment of the utility model;

[0028] Figure 2 This is the second schematic diagram of the three-dimensional structure of the gob-side tunnel retaining filling device provided in the embodiment of the utility model;

[0029] Figure 3 This is one of the structural schematic diagrams of the gob-side tunnel-retaining filling device provided in the embodiment of the utility model;

[0030] Figure 4 This is the second structural schematic diagram of the gob-side tunnel filling device provided by the embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a filling pressure-bearing body provided in an embodiment of the utility model;

[0032] Figure 6 This is one of the structural schematic diagrams of the telescopic bearing assembly provided by the embodiment of the utility model;

[0033] Figure 7 This is the second structural schematic diagram of the telescopic bearing assembly provided by the embodiment of the utility model;

[0034] Figure 8 This is one of the flow diagrams of the method for filling a goaf-side tunnel provided by the embodiment of the utility model;

[0035] Fig. 9 This is the second flow diagram of the method for filling a goaf-side tunnel provided by the embodiment of the utility model;

[0036] Fig.10 It is a structural schematic diagram of a goaf-side lane-retaining filling device provided in an embodiment of the utility model being placed in a space to be reserved.

[0037] Reference numerals:

[0038] 1. Filling pressure bearing body; 11. Filling bag; 111. Filling port; 112. Exhaust port; 113. Filling port sealing cloth tube; 114. Installation port; 115. Installation port sealing cloth tube;

[0039] 12. Bottom reinforcement; 13. Top reinforcement; 14. Lifting ring hook;

[0040] 2. Telescopic bearing assembly; 21. Upper cylinder; 22. Lower cylinder; 221. Discharge port; 23. Auxiliary connecting piece; 24. Upper support plate; 25. Pressurized check valve;

[0041] 3. Injection assembly; 31. Injection pipe; 32. Check valve; 33. Connector;

[0042] 4. Flexible restraints;

[0043] 51. lower support plate; 52. support restraint member;

[0044] 6. Space to be reserved for lanes; 61. Lane bottom plate; 62. Lane top plate;

[0045] 7. Goaf; 8. Coal body at the working face. DETAILED DESCRIPTION

[0046] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0047] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Combine the following Figure 1-Figure 7 The utility model is described in detail.

[0052] The embodiment of the utility model provides a filling device for retaining a tunnel along the goaf, such as Figure 1 and Figure 2 As shown, the device for filling the gob-side tunnel retaining includes a filling pressure-bearing body 1, a material injection component 3 and at least one telescopic bearing component 2.

[0053] The filling pressure-bearing body 1 includes a filling bag 11, a bottom reinforcement 12 arranged on the bottom surface of the filling bag 11, and a top reinforcement 13 arranged on the top surface of the filling bag 11, and the filling bag 11 has an exhaust port 112 on the upper part; at least one telescopic bearing assembly 2 is arranged side by side in the filling bag 11, and each telescopic bearing assembly 2 includes a lower cylinder 22 arranged on the bottom reinforcement 12 and an upper cylinder 21 arranged on the top reinforcement 13, the lower cylinder 22 and the upper cylinder 21 are slidably connected, and the upper part of the upper cylinder 21 has a discharge port 221; the injection assembly 3 is passed through the filling bag 11 and connected to the lower cylinder 22.

[0054] It is understandable that the filling bag 11 is a sac structure for storing slurry. In order to ensure that the filling bag 11 is flat and stressed during the filling process, a bottom reinforcement 12 and a top reinforcement 13 are provided in the filling bag 11. Specifically, in order to ensure that the top of the filling bag 11 is flat and stressed, a top reinforcement 13 is provided on the top surface of the filling bag 11, and in order to ensure that the bottom of the filling bag 11 is flat and stressed, a bottom reinforcement 12 is provided on the bottom surface of the filling bag 11.

[0055] A telescopic bearing assembly 2 is arranged in the filling bag 11, such as Figure 6 and Figure 7 As shown, the telescopic bearing assembly 2 includes a lower cylinder 22 and an upper cylinder 21 which are slidably mounted, the lower cylinder 22 is arranged on the bottom reinforcement 12, and the upper cylinder 21 is connected to the top reinforcement 13. When the upper cylinder 21 moves upward, the top reinforcement 13 moves upward synchronously, so that the top surface of the filling bag 11 moves upward relative to the bottom surface, thereby realizing the opening of the filling bag 11.

[0056] It should be noted that the telescopic bearing assembly 2 is arranged between the top reinforcement 13 and the bottom reinforcement 12. The telescopic bearing assembly 2 serves as a supporting structure of the filling bag 11. Under the action of the top reinforcement 13 and the bottom reinforcement 12, the force on the top and bottom surfaces of the filling bag 11 during the expansion process can be limited, so that the top reinforcement 13 and the bottom reinforcement 12 serve as a reinforcing guarantee structure for the capsule forming after the slurry in the filling bag 11 hardens.

[0057] It is understandable that by moving the upper cylinder 21 upward, the top reinforcement 13 can be moved upward synchronously, so that the moving top reinforcement 13 can effectively and fully connect the top of the filling bag 11, thereby avoiding the problem of air leakage due to insufficient connection.

[0058] The slurry enters the lower cylinder 22 through the injection assembly 3. In the early stage of grouting, the slurry enters the lower cylinder 22 of the telescopic bearing assembly 2 through the injection assembly 3. In the process of filling the inner cavity of the lower cylinder 22 from bottom to top, the slurry drives the upper cylinder 21 to move upward. Since the upper cylinder 21 is connected to the top reinforcement 13, the upper cylinder 21 simultaneously drives the top reinforcement 13 and the top surface of the filling bag 11 to rise until the top reinforcement 13 contacts the tunnel roof 62 of the tunnel space to be reserved. Therefore, the entire filling bag 11 will slowly rise until it fully contacts the tunnel roof 62. Afterwards, due to the discharge port 221 on the upper part of the upper cylinder 21, in the later stage of grouting, as the slurry continues to be injected, the slurry begins to overflow from the upper cylinder 21 into the filling bag 11, and is gradually poured to the top, thereby completing the filling of the slurry in the filling bag 11. After the slurry solidifies, the construction of the tunnel side filling body is completed.

[0059] It is understandable that the number of telescopic bearing components 2 in the filling bag 11 can be reasonably designed to be one or more according to the size of the space to be supported beside the roadway near the goaf (the volume of the filling body beside the roadway), Figure 1 It is shown that the filling bag 11 has two telescopic bearing components 2 built therein. Figure 2 It is shown that a telescopic bearing assembly 2 is built into the filling bag 11. Specifically, when the space to be supported beside the tunnel is small, one telescopic bearing assembly 2 can be arranged in the filling bag 11. When the space to be supported beside the tunnel is large, multiple telescopic bearing assemblies 2 can be arranged in the filling bag 11, and multiple telescopic bearing assemblies 2 are arranged side by side. It should be noted here that when the space to be supported beside the tunnel is large, in order to improve the supporting effect, the cross-sectional dimensions of the top reinforcement 13 and the bottom reinforcement 12 are correspondingly designed to be larger. In order to ensure the stability of the movement of the top reinforcement 13, the top reinforcement 13 is driven to move by multiple telescopic bearing assemblies 2.

[0060] The filling device for leaving lanes along the empty space provided by the embodiment of the utility model is provided with a telescopic bearing assembly 2 in the filling bag 11, and slurry is injected into the lower cylinder 22 through the injection assembly 3. In the process of filling the inner cavity of the lower cylinder 22 from bottom to top, the slurry drives the upper cylinder 21 to move upward until the top reinforcement 13 connected to the upper cylinder 21 abuts against the tunnel roof 62 of the space to be left, and then the slurry overflows into the filling bag 11 through the discharge port 221 of the upper cylinder 21 until the slurry fills the filling bag 11. It can be known that under the action of the bottom reinforcement 12 and the top reinforcement 13, it can be ensured that the top surface of the filling bag 11 and the bottom surface of the filling bag 11 are balanced in force, thereby avoiding air leakage caused by the gap caused by the loose connection, and only by injecting grout into the telescopic bearing assembly 2 through the injection assembly 3, the top surface of the filling bag 11 is moved upward under the drive of the upper cylinder 21, which is easy to operate, thereby reducing the work intensity.

[0061] It should be noted that in the prior art, the roadside support body is not fully connected to the top, which is prone to air leakage through gaps, thereby causing the problem of spontaneous combustion in the goaf. The goaf-retaining road filling device provided by the embodiment of the utility model can ensure the effective connection of the top surface of the filling bag 11 under the action of the bottom reinforcement 12 and the top reinforcement 13, thereby avoiding the problem of spontaneous combustion in the goaf.

[0062] Furthermore, in the related art, the wall quality standardization after the gob-side tunnel is formed is poor due to the use of bricks for manual masonry. However, the gob-side tunnel filling device provided by the embodiment of the utility model can ensure the uniformity of force during the expansion process of the filling bag 11 under the action of the bottom reinforcement 12 and the top reinforcement 13, and under the constraint of the filling bag 11, the tunnel side filling body formed after the slurry in the filling bag 11 solidifies is uniformly stressed, so that the tunnel side filling body has good forming quality and high support strength.

[0063] According to the filling device for retaining a tunnel along the gob, the filling bag 11 can be a canvas bag, and the filling bag 11 can be a closed cube, rectangular parallelepiped, or cylindrical structure, or a bag structure that is a combination of at least two of the cube, rectangular parallelepiped, and cylindrical structures. Of course, the filling bag 11 can also be designed as a closed polygon or other shapes that are compatible with the tunnel side support space of the tunnel space 6 to be retained, so as to achieve effective support of the tunnel side support space.

[0064] In this embodiment, both the bottom reinforcement member 12 and the top reinforcement member 13 may adopt a rib mesh structure. For example, both the bottom reinforcement member 12 and the top reinforcement member 13 adopt a steel mesh.

[0065] In one embodiment of the utility model, a flexible reinforcement layer is provided at the edge matching position of the filling bag 11 and the bottom reinforcement member 12. For example, the bottom reinforcement member 12 and the top reinforcement member 13 are both rectangular, and a flexible reinforcement layer is provided at the corners of the filling bag 11 and the bottom reinforcement member 12 to prevent cracking at the corners of the filling bag 11 and the bottom reinforcement member 12 during the slurry pressure filling process. Of course, a flexible reinforcement layer is also provided at the edge matching position of the filling bag 11 and the top reinforcement member 13.

[0066] Further, such as Figures 1 to 4 As shown, a flexible restraining member 4 is disposed outside the filling bag 11. In this embodiment, the flexible restraining member 4 is a flexible net disposed on the outer surface of the filling bag 11.

[0067] It can be understood that during the process of pressurized filling of the filling bag 11 with slurry, as the slurry overflows from the upper cylinder 21 of the telescopic bearing assembly 2 and causes the filling bag 11 to gradually expand, the filling bag 11 itself produces relative radial constraints. In order to prevent the filling bag 11 (filling bladder) from further deformation, the flexible constraint 4 on the outside of the filling bag 11 exerts a lateral constraint effect, causing the filling bag 11 to stretch mainly in the vertical dimension under the action of the pressurized filling slurry.

[0068] For example, the flexible net is made of a polyester flexible fiber mesh bag, and the high-strength polyester flexible fiber mesh on the outer surface of the filling bag 11 is integrally sewn together, which plays a role of external constraint molding during filling, thereby ensuring that the filling bag body does not rupture during the molding and hardening process of the lane side filling body. Even if the hardened lane side filling body ruptures, the constraint of the filling bag 11 and the polyester flexible fiber mesh bag can always keep the filling bag 11 in a circumferential constraint state, and can still play the role of residual support strength.

[0069] Furthermore, the exhaust port 112 is provided with an exhaust diaphragm (not shown in the figure). During the pressure filling process, the exhaust diaphragm removes the gas in the filling bag 11, allowing the filling slurry to flow fully, and realizing active, rapid, and comprehensive connection with the top of the filling bag 11. For example, the exhaust diaphragm is made of ultra-strong canvas, with natural rubber hung on both sides and then bonded after vulcanization. The exhaust diaphragm is a canvas diaphragm arranged on the outer wall of the filling bag 11. The canvas diaphragm only allows gas to pass through, so that the air inside the filling bag 11 is timely removed during the pressure filling process, and the filling slurry will not overflow, ensuring that the top reinforcement 13 is connected to the tunnel roof 62.

[0070] In an optional embodiment of the present invention, Figure 2 and Figure 3 As shown, a lifting hook 14 is provided on the top of the filling bag 11. For example, the lifting hook 14 located on both sides of the top reinforcement 13 is provided on the filling bag 11 to facilitate the flexible hanging of the filling bag 11 when it is installed.

[0071] In a preferred embodiment of the present invention, Figure 4 and Figure 6 As shown, a discharge port 221 is provided at the top of the upper cylinder 21, and a pressure check valve 25 is provided at the discharge port 221 of the upper cylinder 21. The pressure check valve 25 can discharge and release gas, and the pressurized slurry is injected into the lower cylinder 22 through the injection assembly 3. As the pressurized slurry is injected into the upper cylinder 21, the excessive pressure causes the pressure check valve 25 to open, and the slurry begins to overflow into the filling bag 11, and is gradually poured to the top. It should be noted here that the grouting pressure of the entire slurry filling process is always greater than the opening pressure of the pressure check valve 25.

[0072] In one embodiment of the present invention, the telescopic bearing assembly 2 is detachably disposed on the filling bag 11 .

[0073] For example, Figures 3 to 5 As shown, the lower cylinder 22 is detachably connected to the bottom reinforcement 12, the top reinforcement 13 is provided with an installation opening 114 for the telescopic bearing assembly 2 to pass through, the filling bag 11 is provided with a placement opening corresponding to the installation opening 114, the placement opening is provided with a placement opening sealing cloth tube 115, and the top of the upper cylinder 21 is provided with an auxiliary connecting component overlapped with the top reinforcement 13.

[0074] It can be understood that the lower cylinder 22 is installed on the bottom reinforcement 12 after passing through the placement opening and the installation opening 114, and the top reinforcement 13 is overlapped by the auxiliary connection parts on the upper cylinder 21 to realize the assembly of the telescopic bearing assembly 2 in the filling bag 11, and then the placement opening sealing cloth tube 115 is tightened to realize the sealing of the filling bag 11. The placement opening sealing cloth tube 115 is opened, and the telescopic bearing assembly 2 can be taken out from the placement opening of the filling bag 11 to realize the separation of the telescopic bearing assembly 2 and the filling bag 11.

[0075] It should be noted that if the telescopic bearing assembly 2 is arranged on the filling bag 11, since the telescopic bearing assembly 2 has a certain height, in the initial state, due to the height limit of the telescopic bearing assembly 2, the filling bag 11 is not in a completely contracted state, so that the filling bag 11 with the telescopic bearing assembly 2 built in has a certain volume, which is inconvenient to carry. Therefore, the telescopic bearing assembly 2 of this embodiment can be detachably arranged on the filling bag 11, which is convenient for the independent transportation of the telescopic bearing assembly 2 and the filling bag 11 after separation, and is convenient for rapid assembly in the space to be reserved. In addition, the telescopic bearing assembly 2 and the filling bag 11 are detachably connected, which is convenient for the inspection and replacement of the telescopic bearing assembly 2 and the filling bag 11.

[0076] Furthermore, the bottom reinforcement 12 is provided with a bottom support constraint and limit component for connecting with the lower cylinder 22. The bottom support constraint and limit component includes a lower support plate 51 arranged on the bottom reinforcement 12 and a support constraint 52 arranged on the lower support plate 51. The lower cylinder 22 is detachably arranged on the support constraint 52, and the installation port 114 of the top reinforcement 13 corresponds to the support constraint 52.

[0077] For example, the support constraint 52 is used to keep the lower cylinder 22 in a vertical state during the grouting process. The support constraint 52 can be a hollow cylinder arranged on the lower support plate 51, and the lower support plate 51 is also provided with a plurality of reinforcing support ribs located outside the support constraint 52, and the reinforcing support ribs can be oblique supports. A limited installation space of the lower cylinder 22 is formed between the support constraint 52 and the plurality of oblique supports, and the lower cylinder 22 is arranged in the limited installation space to realize the assembly of the lower cylinder 22 on the bottom reinforcement 12; due to the limiting effect of the limited installation space, the telescopic bearing assembly 2 can always be in a vertically raised state during the pressure grouting process.

[0078] In an optional embodiment of the utility model, the auxiliary connecting component includes an upper support plate 24 and an auxiliary connecting member 23. The upper support plate 24 is arranged on the top surface of the upper cylinder 21. The auxiliary connecting member 23 is movably connected to the upper support plate 24. The auxiliary connecting member 23 is used to overlap the top reinforcement 13.

[0079] It can be understood that auxiliary connecting parts 23 are provided at the opposite ends of the upper support plate 24. The auxiliary connecting parts 23 adopt an auxiliary supporting flat plate structure, and the auxiliary connecting parts 23 can be switched between an extended state and a retracted state; when the auxiliary connecting parts 23 are in the retracted state, the auxiliary connecting parts 23 are retracted above the end of the upper support plate 24; when the auxiliary connecting parts 23 are in the extended state, the auxiliary connecting parts 23 are extended to one side of the upper support plate 24 and are coplanar with the upper support plate 24, so that the auxiliary connecting parts 23 and the top reinforcement 13 are tightly overlapped.

[0080] It can be understood that the telescopic bearing assembly 2 is placed in the limiting installation space of the bottom support constraint limit component through the installation opening at the top of the filling bag 11. At this time, the auxiliary connecting member 23 is in a retracted state; then the auxiliary connecting member 23 is switched to an open state so that the auxiliary connecting member 23 is tightly overlapped with the top reinforcement 13, and finally the installation opening sealing cloth tube 115 is tightened to achieve the sealing of the filling bag 11 and prevent leakage of slurry from the installation opening at the top of the filling bag 11 during the grouting process.

[0081] In the early stage of grouting, the slurry enters the lower cylinder 22 of the telescopic bearing assembly 2 through the injection assembly 3, driving the upper cylinder 21 to move upward. Since the upper cylinder 21 is firmly overlapped with the top reinforcement 13 and the top surface of the filling bag 11, and due to the restraining effect of the bottom support and limiting components, the upper cylinder 21 can only rise vertically, so the entire filling bag 11 will slowly rise until it fully contacts the tunnel roof 62.

[0082] In one embodiment of the present invention, Figure 4As shown, a material injection port 111 is prefabricated on the side of the filling bag 11, a material injection inlet is opened on the side wall of the lower cylinder 22, and the material injection assembly 3 includes a material injection tube 31 built into the filling bag 11, the inlet end of the material injection tube 31 is arranged at the material injection port 111, and the outlet end of the material injection tube 31 is connected to the material injection inlet.

[0083] Furthermore, the injection assembly 3 also includes a quick-connect component that is detachably connected to the inlet end of the injection pipe 31. The quick-connect component includes a grouting high-pressure pipe and a snap-on joint 33. One end of the grouting high-pressure pipe is connected to the snap-on joint 33, and the other end of the grouting high-pressure pipe is used to connect to the injection pipe 31. The snap-on joint 33 is used to quickly connect to the grouting pipe of the external pump station. Preferably, the grouting high-pressure pipe is provided with a check valve 32 to stop the pressurized grouting filling process at any time to avoid slurry backflow.

[0084] Furthermore, the filling port 111 of the filling bag 11 is provided with a filling port sealing cloth tube 113 located outside the quick plug-in component. After the filling tube 31 is separated from the quick plug-in component, the filling port 111 of the filling bag 11 is tightly sealed by the filling port sealing cloth tube 113.

[0085] In a specific embodiment of the present utility model, the empty lane filling device includes a filling pressure-bearing body 1, a material injection component 3 and a telescopic bearing component 2.

[0086] The filling pressure-bearing body 1 comprises a filling bag 11, a bottom reinforcement 12, a top reinforcement 13 and a flexible constraint 4; the bottom reinforcement 12 adopts a steel mesh structure and is arranged on the bottom surface of the filling bag 11; the top reinforcement 13 adopts a steel mesh structure and is arranged on the top surface of the filling bag 11. The top reinforcement 13 is provided with an installation opening 114 for the telescopic bearing assembly 2 to pass through, and the filling bag 11 is provided with a placement opening corresponding to the installation opening 114, and the placement opening is provided with a placement opening sealing cloth tube 115.

[0087] A bottom support constraint and limiting component is provided on the bottom reinforcement 12. The bottom support constraint and limiting component is used to place the telescopic bearing assembly 2. Under the limiting action of the bottom support constraint and limiting component, the telescopic bearing assembly 2 is always in a vertically raised state during the pressure grouting process. The bottom support constraint and limiting component includes a lower support plate 51 provided on the bottom reinforcement 12 and a hollow cylinder provided on the lower support plate 51. The lower support plate 51 is also provided with a plurality of oblique supports located outside the support constraint 52. A limiting installation space is formed between the hollow cylinder and the plurality of oblique supports.

[0088] The flexible restraining member 4 is externally restrained and seamed to the outer surface of the filling bag 11, and plays a role of external restraining molding during filling.

[0089] The telescopic bearing assembly 2 includes a lower cylinder 22 arranged on a bottom support constraint and limiting component and an upper cylinder 21 overlapped on the top reinforcement 13. The lower cylinder 22 and the upper cylinder 21 are slidably connected. The upper part of the upper cylinder 21 has a discharge port 221. The lower cylinder 22 is arranged in the limiting installation space of the bottom support constraint and limiting component to realize the assembly of the lower cylinder 22 on the bottom reinforcement 12. An auxiliary connecting component overlapped on the top reinforcement 13 is arranged on the top of the upper cylinder 21. Due to the limiting effect of the bottom support constraint and limiting component, the telescopic bearing assembly 2 can always be in a vertical shape during the pressure grouting process.

[0090] The injection assembly 3 is used to inject pressurized slurry into the lower cylinder 22. The injection assembly 3 includes an injection tube 31 built into the filling bag 11 and a quick-connect component detachably connected to the inlet end of the injection tube 31. The inlet end of the injection tube 31 is arranged at the injection port 111 on the side of the filling bag 11, and the outlet end of the injection tube 31 is connected to the injection inlet of the side wall of the lower cylinder 22.

[0091] It can be understood that the telescopic bearing assembly 2 serves as the core bearing ring of the tunnel side support and is installed on the bottom support constraint and limit component in the filling bag 11 to ensure that the pressure grouting process is always in a vertically raised state and overlaps with the top reinforcement 13; the filling pressure-bearing body 1 serves as a bag structure for storing slurry, and its top reinforcements 13 and bottom reinforcements 12 serve as reinforcement guarantee structures for the bag forming after the slurry hardens, with the top and bottom pressed and flattened, and the flexible constraint 4 plays the role of external constraint forming during filling.

[0092] It should be noted that after the telescopic bearing assembly 2 is installed on the bottom support and restraint limiting component in the filling bag 11, the mounting opening sealing cloth tube 115 is first tightened to achieve the sealing of the filling bag 11, and then the slurry is injected through the injection assembly 3 to prevent leakage of slurry at the top mounting opening of the filling bag 11 during the grouting process.

[0093] The filling device for retaining a tunnel along the goaf provided by the embodiment of the utility model can effectively enhance the support strength of the filling body beside the tunnel and the top cutting ability of the tunnel roof 62 by filling the pressure-bearing main body 1, and can timely isolate and close the goaf area. It has the advantages of wide application range, high safety, convenient construction operation, and low labor intensity of workers. It can be used in retaining a tunnel along the goaf, supporting the goaf of the working face, strengthening support for the end of mining in the withdrawal channel, and reinforcing support for large-scale roof collapse areas in the tunnel.

[0094] Based on the gob-side tunnel filling device provided in any of the above embodiments, the embodiment of the utility model further provides a gob-side tunnel filling method, such as Figure 8 As shown, the method for filling the gob-side tunnel retaining includes the following steps:

[0095] Step 100: Place the filling pressure-bearing body 1 on the tunnel floor 61 of the tunnel space 6 to be reserved, close to the goaf side.

[0096] It is understandable that if Figure 3 , Figure 5 and Fig.10 As shown, the filling pressure-bearing body 1 in a contracted state is placed in the tunnel floor 61 of the waiting tunnel space 6 close to the goaf side, ensuring that the tunnel floor 61 is flat and hard, and that the filling pressure-bearing body 1 structure has no cracks or gaps. It should be noted here that the waiting tunnel space 6 is formed between the goaf 7 and the coal body 8 of the working face.

[0097] Step 200, inject slurry into the lower cylinder 22 through the injection assembly 3. During the process of the slurry filling the inner cavity of the lower cylinder 22 from bottom to top, the upper cylinder 21 is driven to move upward until the top reinforcement 13 connected to the upper cylinder 21 abuts against the tunnel roof 62 of the tunnel space 6 to be reserved.

[0098] It can be understood that the injection pipe 31 is connected by a quick-connect component, and the injection port 111 of the filling bag 11 is tightly sealed by the injection port sealing cloth tube 113, and pressurized grouting is performed into the inner cavity of the lower cylinder 22 through an external pump station grouting pipe connected to the quick-connect component.

[0099] At the initial stage of grouting, the pressurized grout enters the lower cylinder 22 of the telescopic skeleton bearing mechanism through the injection pipe 31. In the process of filling the inner cavity of the lower cylinder 22 from bottom to top, the slurry drives the upper cylinder 21 to rise. Since the upper cylinder 21 is connected to the top reinforcement 13, the upper cylinder 21 simultaneously drives the top reinforcement 13 and the top surface of the filling bag 11 to rise slowly and uniformly until the top reinforcement 13 contacts the tunnel roof 62 of the tunnel space 6 to be retained.

[0100] Step 300 : The slurry overflows into the filling bag 11 through the discharge port 221 of the upper cylinder 21 until the filling bag 11 is filled.

[0101] It can be understood that in the later stage of grouting, as the pressurized grout continues to be injected, the excessive pressure causes the pressurized check valve 25 of the upper cylinder 21 to open. As the slurry continues to be injected, the slurry begins to overflow from the upper cylinder 21 into the filling bag 11, and gradually pours to the top until the filling bag 11 is filled, thereby completing the filling of the slurry in the filling bag 11.

[0102] It should be noted that, when the upper part of the bag 11 to be filled is fully connected to the top and the filling pressure meets the requirements, the pump station is stopped, the quick-connect components are removed, and the feed port is sealed by the filling port sealing cloth tube 113. After the slurry solidifies, the construction of a tunnel side filling body is completed.

[0103] In a specific embodiment of the present utility model, when the telescopic bearing assembly 2 and the filling pressure-bearing body 1 are detachably connected, step 100 further includes the following contents:

[0104] The support and restraint member 52 of the bottom support and restraint limiting component leaks out of the external space through the installation opening 114 of the top reinforcement member 13 and the placement opening of the filling bag 11.

[0105] like Fig. 9 As shown, after step 100, the method further includes the following steps:

[0106] Step 400: Assemble the telescopic bearing assembly 2

[0107] Place the lower cylinder 22 of the telescopic bearing assembly 2 on the support and constraint member 52 of the bottom support and constraint limit component in the filling bag 11, and then lift the filling pressure-bearing body 1 (filling bag 11) so that the telescopic bearing assembly 2 is immersed in the filling bag 11. At this time, open the auxiliary connecting member 23 on the top of the telescopic bearing assembly 2, so that the auxiliary connecting member 23 and the top reinforcement member 13 are tightly overlapped and firmly connected, and finally tighten the installation opening sealing cloth tube 115 to tighten the top installation opening to prevent leakage during the grouting process.

[0108] It should be noted that the bottom support constraint and limiting component is pre-built into the bottom reinforcement 12 of the filling bag 11 and corresponds to the placement opening at the top of the filling bag 11, which is used to place the telescopic bearing assembly 2. The bottom support constraint and limiting component ensures that the telescopic bearing assembly 2 is always in a vertically raised state during the pressure grouting process.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. A filling device for retaining a tunnel along the goaf, characterized in that: include: A filling pressure-bearing body (1) comprises a filling bag (11), a bottom reinforcement member (12) arranged on the bottom surface of the filling bag (11), and a top reinforcement member (13) arranged on the top surface of the filling bag (11), wherein the filling bag (11) has an exhaust port (112) at the top; At least one telescopic bearing assembly (2) is arranged side by side in the filling bag (11), the telescopic bearing assembly (2) comprising a lower cylinder (22) arranged on the bottom reinforcement member (12) and an upper cylinder (21) arranged on the top reinforcement member (13), the lower cylinder (22) and the upper cylinder (21) being slidably connected, and the upper portion of the upper cylinder (21) is provided with a discharge port (221); The material injection assembly (3) is passed through the filling bag (11) and connected to the lower cylinder (22).

2. The device for filling the gob-side entry retaining according to claim 1 is characterized in that: It also includes a flexible restraining member (4) arranged outside the filling bag (11).

3. The backfilling device for retaining a tunnel along the goaf according to claim 2 is characterized in that: The flexible restraining member (4) comprises a flexible net arranged on the outer surface of the filling bag (11).

4. The backfilling device for retaining a tunnel along the goaf according to claim 1 is characterized in that: The top reinforcement member (13) is provided with a mounting opening (114), the filling bag (11) is provided with a placement opening corresponding to the mounting opening (114), and the placement opening is provided with a placement opening sealing cloth cylinder (115); An auxiliary connection component overlapped with the installation opening (114) is provided at the top of the upper cylinder (21); The lower cylinder (22) is detachably connected to the bottom support restraining and limiting component on the bottom reinforcement (12).

5. The device for filling the gob-side entry retaining according to claim 4 is characterized in that: The auxiliary connection component comprises an upper support plate (24) and an auxiliary connection piece (23), wherein the upper support plate (24) is arranged on the top surface of the upper cylinder (21), the auxiliary connection piece (23) is movably connected to the upper support plate (24), and the auxiliary connection piece (23) is used to overlap the top reinforcement piece (13); The bottom support constraint and limiting component comprises a lower support plate (51), a support constraint member (52) is arranged on the lower support plate (51), the lower cylinder (22) is arranged on the support constraint member (52), and the support constraint member (52) is used to keep the lower cylinder (22) in a vertical state during the grouting process.

6. The gob-side entry retaining filling device according to any one of claims 1 to 5, characterized in that: The injection assembly (3) comprises: An injection pipe (31) is inserted into the filling bag (11), and an outlet end of the injection pipe (31) is connected to the inner cavity of the lower cylinder (22); A quick plug-in component, detachably connected to the inlet end of the injection pipe (31); The filling bag (11) has an injection port (111) for the injection pipe (31) to pass through, and the injection port (111) is provided with an injection port sealing cloth cylinder (113) located outside the quick plug-in component.

7. The gob-side entry retaining filling device according to any one of claims 1 to 5, characterized in that: The discharge port (221) is provided with a pressure check valve (25), and / or, The exhaust port (112) is provided with an exhaust diaphragm.

8. The gob-side entry retaining filling device according to any one of claims 1 to 5, characterized in that: A flexible reinforcement layer is provided at the matching position of the filling bag (11) and the edge of the bottom reinforcement member (12) and / or at the matching position of the filling bag (11) and the edge of the top reinforcement member (13).

9. The gob-side entry retaining filling device according to any one of claims 1 to 5, characterized in that: The bottom reinforcement (12) and / or the top reinforcement (13) adopt a rib mesh structure, and / or, The filling bag (11) is a canvas bag, which is a closed cube, rectangular parallelepiped, cylindrical structure or a combination of at least two of them.

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