Flexible fill retaining wall construction

Abstract

The application discloses a flexible filling retaining wall building structure, which comprises a base, a supporting frame and a supporting net. The base is provided with mounting holes and is arranged at the base of a goaf. The supporting frame comprises a plurality of horizontal rods and a plurality of vertical rods. The horizontal rods and the vertical rods are both double-end telescopic rods. The double-end telescopic rod comprises a middle piece and two end pieces. The two end pieces are respectively connected with the two ends of the middle piece in a forward and reverse threaded mode. When the middle piece rotates relative to the two end pieces, the two end pieces are simultaneously extended or retracted relative to the middle piece. The horizontal rods and the vertical rods are arranged in a horizontal and vertical staggered mode. The two end pieces of the horizontal rods are respectively extended and passed into the pre-drilled holes of the surrounding rocks on the two sides. The two end pieces of the vertical rods are respectively extended and passed into the pre-drilled holes of the surrounding rocks on the top and the mounting holes of the base. The supporting net is arranged on the inner side of the supporting frame. The water filter cloth is arranged on the metal net and extends to cover the surrounding rocks. The application has the advantages of being suitable for goafs with different sizes and improving the recycling rate.

Description

Technical Field

[0002] This application relates to the field of metal mining technology, specifically to a flexible filling retaining wall construction structure. Background Technology

[0004] Underground goaf backfilling technology refers to the use of artificial materials (tailings, waste rock, cementing materials, etc.) to backfill the goaf formed by mining in order to stabilize the rock strata. Before the backfilling operation, temporary or permanent retaining walls need to be constructed at the exit of the roadway / mining area to seal and form a semi-enclosed backfilling space, withstand the static pressure of the slurry, filter water and relieve pressure, and prevent slurry overflow, slurry leakage and sand leakage, so as to ensure the formation of the backfill and the quality of the roof connection.

[0005] Retaining walls are generally classified into flexible retaining walls and rigid retaining walls according to their construction methods. Rigid retaining walls include concrete retaining walls and brick retaining walls. Concrete retaining walls require formwork erection, pouring, and curing, which takes a long time to form and affects the connection of the filling process. Concrete retaining walls are difficult to adapt to large deformations of the surrounding rock or sudden ground pressure, and may crack or even be destroyed.

[0006] Flexible retaining walls are constructed by assembling flexible / deformable materials with a framework. Compared to rigid retaining walls, flexible retaining walls offer greater adaptability to deformation, faster construction, lower cost, and the ability to allow grout to pass through without leaking sand. Currently, the framework of flexible retaining walls typically uses steel structures. During construction, steel bars of appropriate length are cut according to the dimensions of the goaf and then assembled at the goaf. Patent document (CN215927458U) discloses a retaining wall for a downward single-path design. By constructing a support framework with cut transverse and longitudinal steel bars at the goaf, and then fixing baffles and filter cloth, a detachable retaining wall is formed. Although it is easy to disassemble and recycle, the support framework built after recycling is only suitable for goafs with similar dimensions to the goaf at that location. Therefore, the recycling rate is very limited. Summary of the Invention

[0008] Therefore, a flexible filling retaining wall construction structure is needed to solve the problems of existing flexible retaining walls in goaf areas being unable to adapt to goaf areas of different sizes and having low recycling rates.

[0009] To achieve the above objectives, the inventors provide a flexible filling retaining wall construction structure, comprising:

[0010] The base is provided with mounting holes and is located at the base of the goaf, with the mounting holes facing upwards.

[0011] The support frame includes multiple horizontal bars and multiple vertical bars. All horizontal and vertical bars are double-headed telescopic rods. Each double-headed telescopic rod includes a middle component and two end components. The two end components are respectively connected to the two ends of the middle component via forward and reverse threads. When the middle component rotates relative to the two end components, the two end components simultaneously extend or retract relative to the middle component under the action of the threaded transmission, thereby lengthening or shortening the double-headed telescopic rod. The horizontal and vertical bars are arranged in an alternating pattern. The two end components of the horizontal bars extend into pre-drilled holes in the surrounding rock on both sides, and the two end components of the vertical bars extend into pre-drilled holes in the top surrounding rock and mounting holes in the base, respectively.

[0012] A support net is laid on the inside of the support frame and extends to fit the surrounding rock. The inside of the support frame faces the infill.

[0013] A filter cloth is laid on the metal mesh and extends to cover the surrounding rock.

[0014] In some embodiments, the intermediate component is a sleeve, and the inner walls of the ports at both ends of the sleeve are respectively provided with forward threads and reverse threads; both end components are screws, and the two screws are respectively screwed at the ports at both ends of the sleeve. When the sleeve rotates relative to the two screws, the two screws extend or retract relative to the sleeve simultaneously under the action of thread transmission.

[0015] In some embodiments, the double-ended telescopic rod can extend to a range of at least 50 cm.

[0016] In some embodiments, the support frame further includes a diagonal brace assembly, which includes multiple braces that are inclinedly supported on the outside of the support frame, the outside of the support frame being the side facing away from the infill.

[0017] In some embodiments, the diagonal brace assembly includes a plurality of first braces and a plurality of second braces, wherein the length of the first braces is greater than the length of the second braces; the first braces are supported at a first height of the support frame, and the second braces are supported at a second height of the support frame, wherein the first height is higher than the second height.

[0018] In some embodiments, the strut is the double-headed telescopic strut, with the two ends of the strut extending to abut against the support frame and the base of the goaf.

[0019] In some embodiments, the angles between the multiple struts and the vertical plane are different, so that the entire diagonal strut group is divergent relative to the support frame.

[0020] In some embodiments, the support mesh is a flexible metal mesh.

[0021] In some embodiments, the filter cloth is linen.

[0022] In some embodiments, the crossbars and longitudinal bars are connected by cross buckles, the metal mesh is fixed to the support frame by cable ties, the portion of the filter cloth covering the metal mesh is fixed to the metal mesh by steel wire, and the portion of the filter cloth covering the surrounding rock is fixed to the surrounding rock by pneumatic nails.

[0023] Unlike existing technologies, the flexible filling retaining wall construction structure described in the above technical solution includes a support frame comprising multiple horizontal and vertically arranged crossbars and longitudinal bars. The ends of the crossbars pass through pre-drilled holes in the surrounding rock on both sides, while the ends of the longitudinal bars pass through pre-drilled holes in the top surrounding rock and mounting holes in the base. This support frame provides a rigid support, offering sufficient support and load-bearing capacity for the retaining fill material, and providing an installation position for the support net to cover the entire opening of the goaf. The installed support net then provides an installation position for the filter cloth, which can cover the entire opening of the goaf along the support net and extends to cover the surrounding rock. This design avoids grout leakage after filling. The entire flexible filling retaining wall structure is assembled and can be disassembled for future use. Since the horizontal and vertical bars are double-ended telescopic rods with retractable ends driven by threaded transmission, their lengths can be adjusted according to the actual situation. When facing goaf areas of different sizes, only the telescopic length needs to be adjusted to meet the project requirements. This saves materials, shortens the operation time, and improves the flexibility for dealing with goaf areas of different sizes. It can adapt to goaf areas of various sizes, greatly improves the recycling rate, reduces material costs, and reduces construction difficulty and time.

[0024] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0026] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0027] In the accompanying drawings of the instruction manual:

[0028] Figure 1 This is a front view of the flexible filling retaining wall construction structure described in the specific implementation method;

[0029] Figure 2 This is a structural diagram of the double-headed telescopic rod described in a specific embodiment;

[0030] Figure 3 This is an exploded view of the double-headed telescopic rod described in the specific embodiment;

[0031] Figure 4 This is a structural diagram of the base described in a specific embodiment;

[0032] Figure 5 This is a side view of the flexible filling retaining wall construction structure described in the specific embodiment;

[0033] Figure 6 This is a top view of the flexible filling retaining wall construction structure described in the specific implementation method;

[0034] Figure 7 This is a front view of another flexible infill retaining wall construction structure described in a specific embodiment;

[0035] The reference numerals used in the above figures are explained as follows:

[0036] 10. Base; 11. Mounting hole; 12. Pin hole;

[0037] 20. Horizontal bar;

[0038] 30. Longitudinal rod; 31. Double-ended telescopic rod; 310. Sleeve; 3100. Forward thread; 311. Screw rod;

[0039] 40. Support pole; 41. First support pole; 42. Second support pole;

[0040] 50. Buckle;

[0041] 60. The foundation of the goaf;

[0042] 70. Surrounding rock on the left side;

[0043] 80. Surrounding rock on the right side;

[0044] 90. Surrounding rock at the top;

[0045] L1, First Height;

[0046] L2, the second altitude. Detailed Implementation

[0048] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0049] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0050] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0051] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0052] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0053] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0054] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0055] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Underground goaf backfilling technology refers to the use of artificial materials (tailings, waste rock, cementing materials, etc.) to backfill the goaf formed by mining in order to stabilize the rock strata. Before the backfilling operation, temporary or permanent retaining walls need to be constructed at the exit of the roadway / mining area to seal and form a semi-enclosed backfilling space, withstand the static pressure of the slurry, filter water and relieve pressure, and prevent slurry overflow, slurry leakage and sand leakage, so as to ensure the formation of the backfill and the quality of the roof connection.

[0058] Retaining walls are generally classified into flexible retaining walls and rigid retaining walls according to their construction methods. Currently, the framework of flexible retaining walls is usually made of steel structure. During construction, steel bars of appropriate length are cut according to the size of the goaf on site and then assembled at the goaf. Although it is easy to disassemble and recycle, the supporting framework built after recycling is only suitable for goafs with similar size to the goaf at that time. Therefore, the recycling rate is very limited.

[0059] Therefore, this invention provides a flexible filling retaining wall construction structure for controlling the mining area space, blocking the flow of filling material, and ensuring the quality of filling material formation during goaf filling. It features high strength, large load-bearing capacity, convenient and efficient construction, and reusability. In particular, it is applicable to goafs of different sizes, making it more flexible in use. After disassembly and recycling, it can be reused in goafs of different sizes, improving the recycling rate, reducing material costs, reducing construction difficulty, and reducing construction time.

[0060] Please see Figure 1 In a specific embodiment, the flexible filling retaining wall construction structure includes a base 10, a support frame, a support net, and a filter cloth. The support frame is installed in the goaf area through holes pre-drilled in the base 10 and the surrounding rock. The support frame provides an installation position for the support net, and the support net provides an installation position for the stable installation of the filter cloth. The support frame supports the support net, and the support net supports the filter cloth.

[0061] The base 10 is provided with mounting holes 11. The base 10 is located at the base 60 in the goaf area, and the mounting holes 11 face upwards. The support frame includes multiple horizontal bars 20 and multiple vertical bars 30. The horizontal bars 20 and vertical bars 30 are all double-headed telescopic rods 31. The double-headed telescopic rod 31 includes a middle part and two end parts. The two end parts are respectively connected to the two ends of the middle part by forward threads and reverse threads. When the middle part rotates relative to the two end parts, the two end parts extend or retract relative to the middle part under the action of threaded transmission, so as to lengthen or shorten the double-headed telescopic rod 31. The horizontal bars 20 and the vertical bars The 30 horizontal and vertical members are arranged in a crisscross pattern to form a mesh frame, and the two ends of the horizontal members 20 extend into the pre-drilled holes of the surrounding rock on both sides, which include the left surrounding rock 70 and the right surrounding rock 80. The two ends of the vertical members 30 extend into the pre-drilled holes of the top surrounding rock 90 and the mounting holes 11 of the base 10. The support mesh is laid on the inner side of the support frame and extends to fit the surrounding rock on all sides. The inner side of the support frame is the side facing the filling body. The surrounding rock on all sides includes the top surrounding rock 90, the left surrounding rock 70, and the right surrounding rock 80. The filter cloth is laid on the metal mesh and extends to cover the surrounding rock on all sides.

[0062] The support frame of the flexible filling retaining wall structure provides a rigid support, providing sufficient support and bearing capacity for the blocking fill material, and providing an installation position for installing the support net to cover the entire opening of the goaf. The installed support net then provides an installation position for the filter cloth, which can cover the entire opening of the goaf along the support net and extend to cover the surrounding rock, thus avoiding slurry leakage after filling. The entire flexible filling retaining wall structure is assembled and can be disassembled for future use.

[0063] Since both the horizontal bar 20 and the vertical bar 30 are double-headed telescopic rods 31 that can extend and retract at both ends under the action of threaded transmission, the length of the horizontal bar 20 and the vertical bar 30 can be adjusted according to the actual situation. When facing goaf areas of different sizes, it is only necessary to adjust the extension length to meet the needs of the project. This saves materials, shortens the operation time, improves the flexibility of dealing with goaf areas of different sizes, can adapt to goaf areas of various sizes, greatly improves the recycling rate, reduces material costs, reduces construction difficulty, and reduces construction time.

[0064] In some embodiments, the double-headed telescopic rod 31 is made of steel, and the support frame is a steel structure frame. Compared to concrete retaining walls, brick retaining walls, and bagged cemented filler retaining walls, it has a stronger load-bearing capacity and sufficient strength. Due to its special structure, it can be quickly assembled downhole and has extremely high reusability. Furthermore, its extensibility allows for easy adjustment of the telescopic dimensions to address size limitations in different working conditions, significantly reducing material costs, construction difficulty, and construction time. It retains the characteristics of high strength, high load-bearing capacity, convenient and efficient construction, and reusability, while adding extensibility to ensure usability in various situations, greatly improving its flexibility in meeting different size requirements during construction.

[0065] Please see Figure 2 and Figure 3 In some embodiments, the intermediate component is a sleeve 310, and the inner walls of the ports at both ends of the sleeve 310 are respectively provided with a forward thread 3100 and a reverse thread; both end components are screws 311, and the two screws 311 are respectively screwed at the ports at both ends of the sleeve 310. When the sleeve 310 rotates relative to the two screws 311, the two screws 311 extend or retract relative to the sleeve 310 at the same time under the action of thread transmission. With this configuration, after the extension or shortening adjustment is completed, the thread can lock the screw 311 in the axial position. When the screw 311 is subjected to axial tension or thrust, it will not move axially, thus locking the length of the double-headed telescopic rod 31. The length of the entire double-headed telescopic rod 31 can only be adjusted when the sleeve 310 or the screw 311 is subjected to circumferential rotational force. Therefore, after the length is adjusted, the double-headed telescopic rod 31 can normally provide sufficient axial support to abut against the pre-drilled hole of the left surrounding rock 70 and the pre-drilled hole of the right surrounding rock 80, or against the pre-drilled hole of the top surrounding rock 90 and the mounting hole 11 of the base 10.

[0066] In some embodiments, the double-headed telescopic rod 31 can extend to a range of at least 50 cm, providing sufficient telescopic range to accommodate goaf areas of more sizes.

[0067] In some embodiments, the connection between the crossbar 20 and the vertical bar 30 is locked by a cross buckle, which can firmly lock the crossbar 20 and the vertical bar 30, and is convenient to install and disassemble.

[0068] Please see Figure 4In some embodiments, the base 10 has protrusions on both sides, with the two protrusions located on both sides of the mounting hole 11. The protrusions have pin holes 12 or bolt holes, and the axial direction of the pin holes 12 or bolt holes is perpendicular to the axial direction of the mounting hole 11. One end of the longitudinal rod 30 also has a pin hole 12 or bolt hole. When one end of the longitudinal rod 30 is inserted into the mounting hole 11 of the base 10, the pin or bolt can be passed through the pin hole 12 or bolt hole of one side of the protrusion, the pin hole 12 or bolt hole of the longitudinal rod 30, and the pin hole 12 or bolt hole of the other side of the protrusion in sequence, thereby preventing the longitudinal rod 30 from detaching from the base 10.

[0069] In some embodiments, the pre-drilled holes in the surrounding rock are at least 30 cm deep, which makes the insertion of the longitudinal bar 30 or the transverse bar 20 more secure.

[0070] Please see Figure 1 , Figure 5 or Figure 6 In some embodiments, the support frame further includes a diagonal brace group, which includes multiple braces 40. The multiple braces 40 are inclined and supported on the outside of the support frame, and the outside of the support frame is the side facing away from the infill. This arrangement can increase the support strength and load-bearing capacity of the support frame.

[0071] Please see Figure 5 In some embodiments, the diagonal brace assembly includes a plurality of first braces 41 and a plurality of second braces 42, wherein the length of the first braces 41 is greater than the length of the second braces 42; the first braces 41 are supported at a first height L1 of the support frame, and the second braces 42 are supported at a second height L2 of the support frame, wherein the first height L1 is higher than the second height L2. This arrangement can provide support force to the support frame at different heights, thereby increasing the support strength and load-bearing capacity of the support frame.

[0072] In some embodiments, the strut is the double-headed telescopic strut 31, with the two ends of the strut extending to abut against the support frame and the base 60 of the goaf. This arrangement allows the strut to be extended after installation until it cannot be extended further, thereby enhancing the overall support frame's resistance to thrust and shear.

[0073] In some embodiments, the length of the first support rod 41 is at least 3.8m, the length of the second support rod 42 is at least 3m, and it can be extended by at least 50cm through telescoping.

[0074] Please see Figure 7 In some embodiments, the angles between the multiple struts and the vertical plane are different, so that the entire diagonal strut group is divergent relative to the support frame. This can provide support force to the support frame at different angles, increasing the support strength and load-bearing capacity of the support frame.

[0075] Please see Figure 1 , Figure 5 or Figure 6 In some embodiments, the strut is mounted to the crossbar 20 via a snap-fit ​​50.

[0076] In some embodiments, the crossbar 20 is located on the outside of the longitudinal bar 30, and the outside of the longitudinal bar 30 is the side facing away from the filling body. The filling body is located between the goaf and the support frame. This arrangement facilitates the installation of the support rod on the outside of the support frame, reduces the difficulty of installing the support rod, and improves the convenience of installing the support rod.

[0077] In some embodiments, the support mesh is a flexible metal mesh, which allows the support mesh to conform to the surrounding rock, facilitating subsequent shotcreting to form a wall.

[0078] In some embodiments, the filter cloth is made of linen, which allows for the removal of moisture from the filler.

[0079] In some embodiments, the metal mesh is secured to the support frame by cable ties.

[0080] In some embodiments, the portion of the filter cloth covering the metal mesh is fixed to the metal mesh by steel wire, and the portion of the filter cloth covering the surrounding rock is fixed to the surrounding rock by pneumatic nails.

[0081] Before assembling the flexible filling retaining wall structure, it is necessary to measure the basic data of the goaf area, determine the installation location in advance, and plan the layout of the longitudinal members 30 and transverse members 20 of the support frame. It is recommended that the spacing between the multiple longitudinal members 30 and the transverse members 20 be approximately 1 meter. The specific density of the transverse members 20 and longitudinal members 30 should be determined based on the width of the goaf roadway and the usage conditions. Except for the foundation 60 in the goaf area, holes should be pre-drilled in the surrounding rock according to the pre-set positions for the support frame assembly. The holes should be approximately 30 cm deep, and the pre-drilled holes on both sides should be on the same horizontal line. The assembly process is as follows:

[0082] (1) Install the support frame: Adjust the lengths of the longitudinal rods 30 and the transverse rods 20 according to the size of the goaf, ensuring that the lengths match the dimensions of the goaf roadway. Install the longitudinal rods 30, then extend the longitudinal rods 30 and screw the bottom of the longitudinal rods 30 into the mounting holes 11 of the base 10. The top of the longitudinal rods 30 passes through the pre-drilled holes in the surrounding rock. Plan several transverse rods 20 evenly on the outside of the longitudinal rods 30, then extend the transverse rods 20, with both ends of the transverse rods 20 abutting against the pre-drilled holes in the surrounding rock on both sides. Then, use cross clips to lock the connection between the longitudinal rods 30 and the transverse rods 20. Finally, use a wrench to fix them, forming a grid-type rigid frame.

[0083] (2) Installing diagonal braces: Install bracing rods on the horizontal bar 20. The bracing rods are installed in a quincunx pattern with intervals, and long and short bracing rods are installed in a crisscross pattern. One end of the bracing rod is connected to the horizontal bar 20 through a buckle 50, and the other end of the bracing rod is installed on the base 60 of the goaf through the base 10. Specifically, the end of the bracing rod is inserted into the mounting hole 11 of the base 10 and fixed by a pin or bolt. After installation, extend the bracing rod until it can no longer be extended to enhance the overall support frame's resistance to thrust and shear.

[0084] (3) Install the metal mesh: Erect the metal mesh that has been placed on the filling side in advance, and trim it according to the boundary of the surrounding rock to make the boundary of the metal mesh fit the surrounding rock as closely as possible. Hang the metal mesh with cable ties. Leave a passage for one person before installation.

[0085] (4) Install burlap and seal the edges: Hang the burlap on the metal mesh and tie it with small steel wire. Leave some burlap around the perimeter and then use a pneumatic nail gun to lock the reserved burlap to the surrounding rock to prevent grout leakage after filling.

[0086] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A flexible filling retaining wall construction structure, characterized in that, include: The base is provided with mounting holes and is located at the base of the goaf, with the mounting holes facing upwards. The support frame includes multiple horizontal bars and multiple vertical bars. All horizontal and vertical bars are double-headed telescopic rods. Each double-headed telescopic rod includes a middle component and two end components. The two end components are respectively connected to the two ends of the middle component via forward and reverse threads. When the middle component rotates relative to the two end components, the two end components simultaneously extend or retract relative to the middle component under the action of the threaded transmission, thereby lengthening or shortening the double-headed telescopic rod. The horizontal and vertical bars are arranged in an alternating pattern. The two end components of the horizontal bars extend into pre-drilled holes in the surrounding rock on both sides, and the two end components of the vertical bars extend into pre-drilled holes in the top surrounding rock and mounting holes in the base, respectively. A support net is laid on the inside of the support frame and extends to fit the surrounding rock. The inside of the support frame faces the infill. A filter cloth is laid on the metal mesh and extends to cover the surrounding rock.

2. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The intermediate component is a sleeve, with forward and reverse threads respectively on the inner walls of the two ends of the sleeve; both end components are screws, which are screwed onto the two ends of the sleeve. When the sleeve rotates relative to the two screws, the two screws extend or retract relative to the sleeve simultaneously under the action of thread transmission.

3. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The double-headed telescopic rod can extend to a range of at least 50cm.

4. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The support frame also includes a diagonal brace assembly, which includes multiple braces that are inclined and supported on the outside of the support frame, the outside of which is the side facing away from the infill.

5. The flexible filling retaining wall construction structure according to claim 4, characterized in that, The diagonal bracing assembly includes multiple first bracing rods and multiple second bracing rods, wherein the length of the first bracing rods is greater than the length of the second bracing rods; the first bracing rods are supported at a first height of the support frame, and the second bracing rods are supported at a second height of the support frame, wherein the first height is higher than the second height.

6. The flexible filling retaining wall construction structure according to claim 4, characterized in that, The strut is a double-headed telescopic strut, with its two ends extending to the base of the support frame and the goaf, respectively.

7. The flexible filling retaining wall construction structure according to claim 4, characterized in that, The angles between the multiple struts and the vertical plane are different, so that the entire diagonal strut group is divergent relative to the supporting frame.

8. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The support mesh is a flexible metal mesh.

9. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The filter cloth is made of linen.

10. The flexible filling retaining wall construction structure according to claim 1, characterized in that, The horizontal and vertical bars are connected by cross buckles. The metal mesh is fixed to the support frame by cable ties. The part of the filter cloth covering the metal mesh is fixed to the metal mesh by steel wire. The part of the filter cloth covering the surrounding rock is fixed to the surrounding rock by pneumatic nails.

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