A large mining height lane type filling body-frame combined bearing structure and installation method

Abstract

The present application relates to the technical fields of mine support and filling, and discloses a large-mining-height lane type filling body-frame combined bearing structure and a mounting method, wherein the large-mining-height lane type filling body-frame combined bearing structure comprises a bearing structure, an adjusting assembly, a protective net and a connecting assembly; the bearing structure comprises a plurality of cross braces and side braces for connecting the cross braces, the side braces are arranged at two ends of the cross braces, the adjusting assembly is mounted at one end of the cross brace, and the protective net is fixedly mounted on the side brace; the top end of the connecting assembly is used for being connected with a roof anchor rod head at a corresponding position, and the bottom end of the connecting assembly is connected and fixed with the cross brace. The bearing structure and the mounting method are simple and efficient, can improve the stability of a mining lane coal pillar side slope and a filling body side slope, can improve the anti-deformation capacity of the filling body when being cast in the filling body, and are favorable for safe, efficient and rapid mining of the lane.

Description

Technical Field

[0001] This invention relates to the field of mine support and backfilling technology, and in particular to a combined load-bearing structure of backfill body-frame in a high mining depth roadway and its installation method. Background Technology

[0002] Longwall sequential cemented backfilling mining is a method in which branch roadways are arranged between the transport roadway and the return airway of the longwall working face for coal mining and backfilling. The coal mining branch roadways and the backfilling branch roadways are arranged alternately. After coal mining, backfilling is carried out, and then coal is mined close to the backfill body. This process is repeated in a cycle, with coal mining and backfilling carried out in parallel, to achieve continuous coal mining and backfilling of the working face by "digging roadways to extract coal and backfilling roadways one by one".

[0003] In existing branch roadway support technologies, the safety of the roof surrounding rock can be ensured by anchor bolt support, but there is a lack of effective solutions for controlling the stability of the sidewalls of branch roadways with excessive height. Conventional support methods cannot simultaneously meet the dual requirements of temporary coal pillar bearing and long-term reinforcement of the backfill, resulting in the need for repeated support of the backfill side when excavating adjacent branch roadways. This increases material consumption, prolongs the construction period, and anchor bolt support of the coal wall side also affects the mining efficiency of the coal pillar. Summary of the Invention

[0004] The purpose of this invention is to provide a combined load-bearing structure of a high-extraction roadway filling body and frame, and an installation method thereof, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a combined load-bearing structure of a high-extraction roadway filling body-frame, comprising:

[0006] A load-bearing structure is provided for supporting the two sides of a roadway; the load-bearing structure includes multiple horizontal braces and side braces for connecting the horizontal braces, the side braces being disposed at both ends of the horizontal braces;

[0007] An adjustment component is installed at one end of the cross brace, and the adjustment component is used to tighten the load-bearing structure on both sides of the roadway.

[0008] A protective net is fixedly installed on the side support and is used to prevent the backfill and coal from collapsing on both sides of the roadway.

[0009] A connecting component is provided at both ends of the upper cross brace. The top end of the connecting component is used to connect with the top plate anchor head at the corresponding position, and the bottom end of the connecting component is connected and fixed to the cross brace.

[0010] Preferably, the cross brace includes a steel pipe and connecting ribs disposed at both ends of the steel pipe. The connecting ribs are provided with threads. The side brace and the adjusting assembly are both installed on the cross brace by nuts and the connecting ribs.

[0011] Preferably, the connecting bars are steel bar one and steel bar two, the length of steel bar one is 150mm to 250mm, and the length of steel bar two is 50mm to 150mm.

[0012] Preferably, the adjusting component includes a sleeve, one end of which is fixedly connected to a nut, and the sleeve is threadedly connected to the reinforcing bar through the nut.

[0013] Preferably, the sleeve is composed of multiple steel bars arranged along the circumferential direction.

[0014] Preferably, the protective net is a steel mesh, the side brace is a steel bar, and the steel mesh is fixedly connected to the steel bar by wire.

[0015] Preferably, the steel bars include frame steel bars and diagonal steel bars. Both ends of the frame steel bars and the diagonal steel bars are provided with holes for connecting with the cross brace, and the middle of the diagonal steel bars is provided with holes for connecting multiple diagonal steel bars.

[0016] Preferably, the reinforcing mesh is composed of multiple longitudinal reinforcing bars and multiple transverse reinforcing bars arranged in a cross pattern, and the intersections of the longitudinal reinforcing bars and the transverse reinforcing bars are fixed by resistance welding.

[0017] Preferably, the connecting assembly includes a hook head, a hook connector, and a pipe clamp;

[0018] The upper part of the hook head is provided with bolt holes for connection with the top plate anchor head;

[0019] The upper part of the hook connector is a ring structure, which is used to connect with the hook head, and the lower part of the hook connector is provided with a through hole for connecting with the pipe clamp.

[0020] The pipe clamp includes two square plates. The middle of the square plates is provided with an arc-shaped structure for connecting the cross brace. The top and bottom of the square plates are provided with through holes for connecting the two square plates. The two square plates are connected and fixed by bolts and nuts.

[0021] The installation method of the combined load-bearing structure of the high-extraction tunnel filling body-frame structure provided by the present invention includes the following steps:

[0022] S1. Connect the four hook heads to the corresponding top plate anchor heads using bolt holes. After hanging the hook connectors on the lower part of the hook heads, seal the opening of the hook heads with wire. Then connect the pipe clamps to the lower part of the hook connectors with bolts and nuts.

[0023] S2. Connect the upper cross brace in the load-bearing structure to the pipe clamp using bolts and nuts;

[0024] S3. Pass the reinforcing bars in the cross brace through the frame steel bars, diagonal steel bars, nuts and sleeves with nuts in sequence, and then fix the middle of the diagonal steel bars with bolts and nuts;

[0025] S4. Pass the steel bars in the cross brace through the frame steel bars, diagonal steel bars and nuts in sequence, tighten the nuts to clamp the steel bars, and then connect the lower cross brace.

[0026] S5. Use wire to fix the steel mesh to the steel bars on both ends of the load-bearing structure;

[0027] S6. By rotating the sleeve, adjust the relative position of the sleeve and the cross brace to ensure that the load-bearing structure fits tightly against both sides of the roadway, ensuring the stress distribution of the support system and forming a stable pressure-bearing structure, thus completing the installation of the filling body-frame combined load-bearing structure.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] 1. The combined load-bearing structure of the backfill body and frame in the high-extraction roadway is pre-placed in the critical area between the coal pillar and the backfill body before the branch roadway is filled, which can greatly improve the stability of the side walls of the coal pillar and the backfill body in the branch roadway.

[0030] 2. After the branch tunnel is filled, the combined load-bearing structure of the high-extraction tunnel-type filling body-frame is cast into the filling body, which is equivalent to pre-installing tie rods in the filling body, becoming the anti-deformation structure in the filling body, and playing the role of reinforcing the filling body.

[0031] 3. The combined load-bearing structure of the high-extraction roadway filling body and frame transforms the temporary support structure into a permanent reinforcement system for the filling body. When the next adjacent branch roadway is excavated, because the filling body contains the combined load-bearing structure of the high-extraction roadway filling body and frame, the side of the filling body no longer needs special support. This saves a lot of support materials and construction time, which is conducive to the safe, efficient and rapid mining of the branch roadway. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the combined load-bearing structure of the high-extraction tunnel-type filling body-frame of the present invention;

[0034] Figure 2 This is a schematic diagram of the cross brace structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the connection component of the present invention;

[0036] In the diagram: 1. Connecting component; 2. Horizontal brace; 3. Side brace; 4. Sleeve; 5. Reinforcing mesh; 6. Steel pipe; 7. Connecting bar; 8. Hook head; 9. Hook connector; 10. Pipe clamp. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] like Figures 1 to 3 As shown, the present invention provides a combined load-bearing structure of a high-extraction tunnel filling body-frame, comprising:

[0039] The load-bearing structure is used to support the two sides of the roadway; the load-bearing structure includes multiple horizontal braces 2 and side braces 3 for connecting the horizontal braces 2, with the side braces 3 located at both ends of the horizontal braces 2;

[0040] An adjustment component is installed at one end of the cross brace 2. The adjustment component is used to tighten the load-bearing structure on both sides of the roadway.

[0041] The protective net is fixedly installed on the side support 3. The protective net is used to prevent the backfill and coal body on both sides of the roadway from collapsing.

[0042] Connecting component 1 is located at both ends of the upper cross brace 2. The top end of connecting component 1 is used to connect with the top plate anchor head at the corresponding position, and the bottom end of connecting component 1 is connected and fixed to the cross brace 2.

[0043] The high-extraction roadway-type backfill-frame combined load-bearing structure provided by this invention is pre-placed in the critical area between the coal pillar and the backfill before the auxiliary roadway is mined. During the mining stage, it acts as an active support system to control the deformation of both sides of the sidewalls. After backfilling, the backfill-frame combined load-bearing structure and the cemented backfill solidify into a whole, forming an internal deformation-resistant unit, directly improving the shear resistance of the backfill. This design transforms the temporary support structure into a permanent reinforcement system for the backfill, avoiding repeated support on the backfill side during adjacent auxiliary roadway excavation, and significantly improving the stability of the coal pillar-backfill composite structure through a synergistic load-bearing mechanism. This provides a key technical guarantee for the efficient implementation of longwall roadway-by-road cemented backfilling technology.

[0044] The scheme is further optimized. The cross brace 2 includes a steel pipe 6 and connecting ribs 7 set at both ends of the steel pipe 6. The connecting ribs 7 are threaded. The side brace 3 and the adjustment component are installed on the cross brace 2 through nuts and connecting ribs 7.

[0045] The scheme was further optimized, with the connecting bars 7 being bar 1 and bar 2, bar 1 having a length of 150mm to 250mm and bar 2 having a length of 50mm to 150mm.

[0046] The scheme is further optimized. The adjustment component includes a sleeve 4, one end of which is fixedly connected to a nut. The sleeve 4 is threadedly connected to the reinforcing bar 1 through the nut.

[0047] The design was further optimized so that sleeve 4 is composed of multiple steel bars arranged along the circumference.

[0048] The scheme was further optimized. The protective netting is made of steel mesh 5, and the side supports 3 are made of steel bars. The steel mesh 5 is fixedly connected to the steel bars by iron wire.

[0049] The design is further optimized so that the steel bars include frame steel bars and diagonal steel bars. Both ends of the frame steel bars and diagonal steel bars are provided with holes for connecting with the cross brace 2, and the middle of the diagonal steel bars is provided with holes for connecting multiple diagonal steel bars.

[0050] The design was further optimized so that the steel mesh 5 is composed of multiple longitudinal steel bars and multiple transverse steel bars arranged in a cross pattern, and the intersections of the longitudinal and transverse steel bars are fixed by resistance welding.

[0051] The solution has been further optimized, and the connecting component 1 includes a hook head 8, a hook connector 9, and a pipe clamp 10;

[0052] The upper part of the hook head 8 is provided with bolt holes for connection with the top plate anchor head;

[0053] The upper part of the hook connector 9 is a ring structure, which is used to connect with the hook head 8. The lower part of the hook connector 9 is provided with a through hole for connecting with the pipe clamp 10.

[0054] The pipe clamp 10 includes two square plates. The middle of the square plates is provided with an arc-shaped structure for connecting the cross brace 2. The top and bottom of the square plates are provided with through holes for connecting the two square plates. The two square plates are connected and fixed by bolts and nuts.

[0055] Example

[0056] The filling area employs longwall, roadway-by-road cemented filling. Each branch roadway is 78.1m long, 5m wide, and 7.57m high. Due to the significant coal seam thickness, a single mining device cannot achieve full-height mining in one pass. Mining is divided into two processes: upper-layer penetration and lower-layer bottom-pulling. The upper-layer mining height is 4.5m, and the lower-layer mining height is approximately 3.07m. Existing branch roadway support technologies can ensure safety by using anchor bolts to support the roof rock, but lack effective solutions for controlling the stability of the sidewalls in branch roadways with excessive height. This patent addresses the challenge of controlling the stability of the sidewalls in high-mining-height branch roadways by proposing a "filling body-frame combined load-bearing structure." By pre-installing a deformable frame at the interface between the coal pillar and the filling body, this structure acts as active support to control sidewall deformation during the mining phase; after filling, it solidifies with the cemented filling body to form a built-in shear-resistant unit, transforming the temporary support frame into a permanent reinforcement system.

[0057] The above-mentioned high-extraction roadway-type filling body-frame combined load-bearing structure device is used to support the filling working face. The specific structural dimensions and steps are as follows:

[0058] The hook in the load-bearing structure is designed to be 1500mm long.

[0059] The cross brace 2 is made of steel pipe 6, with an outer diameter of Φ40×6mm×4650mm. A Φ34×100mm threaded steel bar is welded to one end of the steel pipe 6. A Φ34×200mm threaded steel bar is welded to the other end of the steel pipe 6. A sleeve 4 is fitted onto this end of the steel bar for adjusting the length and providing tension. The length of the sleeve 4 is set to 50mm according to the width of the branch tunnel.

[0060] The load-bearing structure is connected at both ends by various steel bars. The diagonal steel bars are 4500mm long, 100mm wide, and 3mm thick, while the frame steel bars are 3000mm long, 100mm wide, and 3mm thick.

[0061] The steel mesh has a sheet size of 3000mm×3000mm, and the square mesh size is 50mm×50mm.

[0062] S1. Connect the four hook heads 8 to the corresponding top plate anchor heads using bolt holes. After hanging the hook connector 9 on the lower part of the hook head 8, seal the opening of the hook head 8 with wire. Then connect the pipe clamp 10 to the lower part of the hook connector 9 with bolts and nuts.

[0063] S2. Connect the upper cross brace 2 in the load-bearing structure to the pipe clamp 10 using bolts and nuts;

[0064] S3. Pass the steel bars in the cross brace 2 through the frame steel bars, diagonal steel bars, nuts and sleeves 4 with nuts in sequence, and then fix the middle part of the diagonal steel bars with bolts and nuts.

[0065] S4. Pass the steel bars in the cross brace 2 through the frame steel bars, diagonal steel bars and nuts in sequence, tighten the nuts to clamp the steel bars, and then connect the lower cross brace 2.

[0066] S5. Fix the steel mesh 5 to the steel bars with iron wire on both ends of the load-bearing structure;

[0067] S6. By rotating the sleeve 4, adjust the relative position of the sleeve 4 and the cross brace 2 to make the bearing structure fit tightly against the two sides of the roadway, ensure the stress distribution of the support system and form a stable pressure-bearing structure, and complete the installation of the filling body-frame combined bearing structure.

[0068] This invention improves the stability of the coal pillar sidewalls and backfill sidewalls in mining roadways. When cast into the backfill, it also enhances the backfill's resistance to deformation, facilitating safe, efficient, and rapid mining of the roadways. The load-bearing structure avoids repeated support of the backfill sidewalls during adjacent roadway excavation and significantly improves the stability of the coal pillar-backfill composite structure through a synergistic load-bearing mechanism, providing key technical support for the efficient implementation of longwall roadway-by-road cemented backfilling technology.

[0069] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A combined load-bearing structure of a high-extraction tunnel-type filling body and frame, characterized in that, include: A load-bearing structure, which is used to support the two sides of the roadway; The load-bearing structure includes multiple horizontal supports (2) and side supports (3) for connecting the horizontal supports (2), the side supports (3) being disposed at both ends of the horizontal supports (2); An adjustment component is installed at one end of the cross brace (2) and is used to tighten the bearing structure on both sides of the roadway. The protective net is fixedly installed on the side support (3) and is used to prevent the filling material and coal body on both sides of the roadway from collapsing. A connecting component (1) is provided at both ends of the upper cross brace (2). The top end of the connecting component (1) is used to connect with the top plate anchor head at the corresponding position, and the bottom end of the connecting component (1) is connected and fixed to the cross brace (2). The cross brace (2) includes a steel pipe (6) and connecting ribs (7) provided at both ends of the steel pipe (6). The connecting ribs (7) are provided with threads. The side brace (3) and the adjusting assembly are both installed on the cross brace (2) by nuts and the connecting ribs (7). The connecting bars (7) are steel bar one and steel bar two, the length of steel bar one is 150mm to 250mm, and the length of steel bar two is 50mm to 150mm; The adjusting assembly includes a sleeve (4), one end of which is fixedly connected to a nut, and the sleeve (4) is threadedly connected to the first reinforcing bar through the nut; the sleeve (4) is composed of multiple reinforcing bars arranged along the circumferential direction; The connecting assembly (1) includes a hook head (8), a hook connector (9), and a pipe clamp (10). The upper part of the hook head (8) is provided with bolt holes for connection with the top plate anchor head; The upper part of the hook connector (9) is a ring structure, which is used to connect with the hook head (8). The lower part of the hook connector (9) is provided with a through hole for connecting with the pipe clamp (10). The pipe clamp (10) includes two square plates. The middle part of the square plate is provided with an arc-shaped structure for connecting the cross brace (2). The top and bottom of the square plate are provided with through holes for connecting the two square plates. The two square plates are connected and fixed by bolts and nuts.

2. The combined load-bearing structure of high-extraction roadway filling body-frame as described in claim 1, characterized in that, The protective net is a steel mesh (5), the side support (3) is a steel bar, and the steel mesh (5) is fixedly connected to the steel bar by iron wire.

3. The combined load-bearing structure of the high-extraction roadway filling body-frame as described in claim 2, characterized in that, The steel bars include frame steel bars and diagonal steel bars. Both ends of the frame steel bars and the diagonal steel bars are provided with holes for connecting with the cross brace (2). The middle part of the diagonal steel bars is provided with holes for connecting multiple diagonal steel bars.

4. The combined load-bearing structure of high-extraction roadway filling body-frame as described in claim 2, characterized in that, The steel mesh (5) is composed of multiple longitudinal steel bars and multiple transverse steel bars arranged in a cross pattern. The intersection of the longitudinal steel bars and the transverse steel bars is fixed by resistance welding.

5. The installation method of the combined load-bearing structure of the high-extraction tunnel filling body-frame according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Connect the four hook heads (8) to the corresponding top plate anchor head using the bolt holes. After hanging the hook connector (9) on the lower part of the hook head (8), seal the opening of the hook head (8) with wire. Then connect the pipe clamp (10) to the lower part of the hook connector (9) with bolts and nuts. S2. Connect the upper cross brace (2) in the load-bearing structure to the pipe clamp (10) using bolts and nuts; S3. Pass the steel bars in the cross brace (2) through the frame steel bars, diagonal steel bars, nuts and sleeves with nuts (4) in sequence, and then fix the middle part of the diagonal steel bars with bolts and nuts; S4. Pass the steel bars in the cross brace (2) through the frame steel bars, diagonal steel bars and nuts in sequence, tighten the nuts to clamp the steel bars, and then connect the lower cross brace (2). S5. Use wire to fix the steel mesh (5) to the steel bars on both ends of the load-bearing structure; S6. By rotating the sleeve (4), adjust the relative position of the sleeve (4) and the cross brace (2) so that the bearing structure fits tightly against the two sides of the roadway, ensure the stress distribution of the support system and form a stable pressure-bearing structure, and complete the installation of the filling body-frame combined bearing structure.

Images