Advanced support construction device for composite roof

Abstract

The utility model relates to an advance support construction device for a composite roof, which is used for supporting an advance channel roof and comprises a metal net, a plurality of rows of anchoring parts, a steel belt and a joist, the metal net is laid on the surface of the roof, the roof is further provided with a plurality of rows of anchoring parts which are arranged at intervals, and each row of anchoring parts comprises a plurality of anchor rods and anchor cables which are combined and arranged in a linear shape; steel belts are arranged between the anchor rods and the anchor cables in each row of anchoring parts, supporting beams are arranged between the corresponding anchor cables in the multiple rows of anchoring parts, the supporting beams and the steel belts are matched to press the metal net, and it is ensured that the metal net is tightly attached to the top plate; a top net plate is detachably arranged between every two adjacent supporting beams, and the top net plates are bent to be in an arch shape and abut against the lower portion of the metal net. The anchor rods, the anchor cables, the joists, the metal nets and the steel belts are combined for supporting, advanced roof protection control can be carried out before the broken roof is exposed, advanced supporting is changed from passive to active, and the supporting strength, stability and reliability of the advanced supporting are improved.

Description

Technical Field

[0001] This utility model relates to the field of mine roof support technology, and in particular to an advanced support construction device for composite roofs. Background Technology

[0002] To further promote "low-carbon development of high-carbon resources and green development of black coal" and achieve green mining, the roof management method in some mining areas has been changed from caving to reinforced roof support. Reinforced roof support is for subsequent backfilling construction. The caving method involves removing the supports near the goaf, allowing the immediate roof to collapse naturally or be forced to collapse. It is suitable for roofs that are prone to collapse or have moderate stability. However, the caving method has drawbacks such as severe disturbance to the surrounding rock and large surface deformation, leading to a gradual shift towards backfilling mining technology.

[0003] Paste backfilling is a type of backfilling mining technology. In paste backfilling, slurry is pumped from the surface to the goaf behind the underground coal face. After solidification, the slurry forms a backfill, thus controlling surface deformation. Paste backfilling mining can solve a series of problems in coal mines, such as coal resource compression under the "three underground" conditions (underground, underground, and underground), solid waste disposal, control of rock strata and surface movement, low mine resource recovery rates, and extending mine service life. It is of great significance to the sustainable development of mining areas and environmental construction.

[0004] In some mining areas, the coal face is a deep-buried coal seam with high mining height and backfilling. For this, layered mining is necessary: ​​first, excavators and other equipment are used to excavate the upper coal seam, and then a coal mining machine is used to excavate the lower coal seam. For example... Figure 1 and Figure 2 As shown, the hydraulic support area contains several hydraulic supports, coal mining machines, scraper conveyors, and other equipment. Behind the hydraulic supports is the goaf, which requires paste filling to form a backfill. In front of the hydraulic supports is the raw coal to be mined, and the sidewalls of this raw coal are the coal face. The maximum roof control distance is approximately 20m, and the roof control width Lk = LC + G + Ld + B, where LC is the width of the advance passage (6.3m), G is the drum width + beam end distance (1.4m), Ld is the support length (8.2m), and B is the filling step distance (4m). The maximum roof control distance is less than the minimum pressure step distance of 28m during the basic roof cycle.

[0005] The space formed after the upper coal seam is mined is called the advance passage. At this point, the roof of the advance passage needs to be supported. This is to mitigate the impact of mining disturbances on the roof, prevent roof collapse and roof fall accidents, and ensure the stability of the mining machine's working environment. It also provides space for later paste backfilling. In short, due to the composite roof collapsing during mining, the space behind the existing hydraulic supports is insufficient for backfilling. To ensure sufficient backfilling space, an advance passage is constructed on the coal face side, and the advance roof is reinforced to ensure the roof in the backfilling area is properly positioned. Once the roof of the advance passage collapses, backfilling cannot be carried out. Strengthening the roof support of the advance passage achieves the goal of reserving space for later backfilling.

[0006] Conventional roof support can employ anchor-mesh-shotcrete support technology. This involves suspending a metal mesh on the roof using several anchor bolts, and then spraying mortar onto the roof and the surface of the metal mesh to form a support structure. However, each anchor bolt and the metal mesh has only one connection point, resulting in a small bonding area and low strength. Relying solely on anchor bolts is insufficient to effectively support a large area of ​​the metal mesh. Furthermore, since there are unmined coal seams below the advance passage, the shotcrete support method can negatively impact the quality of the underlying coal seam. Summary of the Invention

[0007] To address the problem of low strength in conventional roof support, this invention provides a composite roof pre-support construction device. It employs a combination of anchor bolts, metal mesh, steel strips, support beams, and anchor cables for support, enabling large-area, high-strength, and uniform support of the metal mesh, effectively preventing or reducing roof collapse accidents.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A composite roof slab advanced support construction device is used for supporting the roof slab of an advanced passageway. It includes a metal mesh, multiple rows of anchors, steel strips and supporting beams. The metal mesh is laid on the surface of the roof slab, and multiple rows of spaced anchors are also provided on the roof slab to facilitate the fixing of the metal mesh. Each row of anchors includes multiple anchor rods and anchor cables arranged in a straight line to provide different anchoring forces.

[0010] The steel strip is installed between the anchor rods and anchor cables in each row of anchors to facilitate the support of the metal mesh. An anchor is provided at the end of the anchor rod to lock the steel strip. A support beam is installed between the corresponding anchor cables in multiple rows of anchors to support the metal mesh and the steel strip at the same time. After the end of the anchor cable passes through the steel strip, an anchor is provided to connect the support beam. The support beam and the steel strip are arranged vertically. The support beam, the steel strip and the metal mesh are arranged in sequence from bottom to top. The support beam and the steel strip work together to press the metal mesh tightly to ensure that the metal mesh is in close contact with the top plate.

[0011] A top mesh plate is detachably installed between two adjacent support beams. The top mesh plate is bent into an arch shape and rests against the metal mesh below, providing a reliable force to support the metal mesh. One end of each support beam rests against a hydraulic support, and the other end is equipped with a telescopic support. The telescopic support rests vertically against the coal seam, improving the reliability of the support beam installation.

[0012] Furthermore, the metal mesh is a mesh body made up of several pieces of steel mesh spliced ​​together. The two adjacent pieces of steel mesh overlap each other, and the overlap of the two adjacent pieces of steel mesh is tied and fixed, which facilitates the transportation and installation of the metal mesh and improves the overall integrity of the metal mesh. The overlap of the two adjacent pieces of steel mesh and the steel strip correspond to the supporting beam to ensure the support of the edge of the steel mesh.

[0013] Furthermore, one end of the anchor is anchored upward into the top plate, and the other end of the anchor extends downward out of the top plate; the anchor rods and anchor cables in each row of anchors are arranged alternately, and the length of the anchor rod is shorter than that of the anchor cable.

[0014] Furthermore, the steel strip is a W-shaped steel strip. The end of the anchor rod passes through the metal mesh and the steel strip and is connected to the first anchor. The first anchor includes a nut and a tray. The tray rests against the steel strip. Positioning strips are provided on both sides of the tray. The positioning strips are inserted into the steel strip to prevent the tray from deflecting. The nut is tightly pressed against the tray to support it.

[0015] Furthermore, the end of the anchor cable passes through the metal mesh, steel strip, and support beam and is connected to the second anchor. The support beam is a channel steel structure with slots on both sides. The slots are engaged with the steel strip to facilitate the limiting of the support beam and ensure reliable stability at the connection node between the steel strip and the support beam.

[0016] Furthermore, there are multiple top mesh plates between two adjacent support beams, and at least one top mesh plate is arranged between two adjacent rows of anchors. The top mesh plate includes an elastic steel plate bent into an arch shape and hook plates set at both ends of the elastic steel plate. The elastic steel plate is connected to the support beam through the hook plates. The elastic steel plate pushes the metal mesh upward to avoid excessive suspension of the metal mesh.

[0017] Furthermore, each end of the hook plate is provided with a telescopic rod, and the two telescopic rods are arranged in a figure-eight shape below the elastic steel plate. The heads of the two telescopic rods are close together and abut against the middle of the elastic steel plate, providing reliable support to the elastic steel plate to tighten the metal mesh.

[0018] The beneficial effects of this utility model through the above technical solution are:

[0019] This utility model has a reasonable structural design. Multiple rows of anchors are arranged on the top plate. Each row of anchors consists of anchor rods and anchor cables. The anchors connect the steel strips and supporting beams. Multiple steel strips and multiple supporting beams are arranged in a grid pattern, which can provide uniform support for the metal mesh arranged on the surface of the top plate over a large area, increase the support area, ensure that the metal mesh can be tightly attached to the top plate, and provide a certain amount of support force to support the top plate, thereby improving the load-bearing capacity and support strength of the support structure.

[0020] This invention features a top mesh panel arranged between two adjacent support beams. The top mesh panel is arched and possesses a certain degree of elastic deformation capability, allowing it to actively and firmly press against the metal mesh below, providing stable active support and preventing the metal mesh from deforming under pressure. Simultaneously, there are telescopic rods arranged in a V-shape below the top mesh panel. These two telescopic rods work together to support the middle of the top mesh panel, increasing the reliability of the top mesh panel's support for the metal mesh and improving the effectiveness of the mesh-covered roof. Attached Figure Description

[0021] Figure 1 This is an overhead view of the existing goaf, with the arrows pointing in the direction of the hydraulic support's movement.

[0022] Figure 2 This is a side view of the existing goaf, with the arrows pointing in the direction of the hydraulic support's movement.

[0023] Figure 3 This is a front view of a composite roof slab advanced support construction device according to this utility model.

[0024] Figure 4 This is a side view of a composite roof slab advanced support construction device according to this utility model.

[0025] Figure 5 This is a top view of a pre-support construction device for composite roof slabs according to this utility model. The metal mesh is not shown in the figure.

[0026] Figure 6 This is a schematic diagram of an anchor for a composite roof slab advanced support construction device according to this utility model.

[0027] Figure 7 This is a schematic diagram of the second anchor of a composite roof slab advanced support construction device according to this utility model.

[0028] Figure 8 This is a schematic diagram of the top mesh plate of a composite roof slab advanced support construction device according to this utility model.

[0029] Figure 9 This is a schematic diagram of a telescopic bracket for an advanced support construction device for composite roof slabs according to this utility model.

[0030] The attached diagram is labeled as follows: 1 Hydraulic support, 2 Coal mining machine, 3 Roof, 4 Coal wall, 5 Metal mesh, 6 Anchor, 61 Anchor bolt, 62 Anchor cable, 7 Steel strip, 8 Support beam, 9 Anchor 1, 91 Nut 1, 92 Pallet 1, 10 Positioning strip, 11 Anchor 2, 12 Slot, 13 Roof mesh plate, 131 Elastic steel plate, 132 Hook plate, 14 Telescopic rod, 141 Threaded cylinder, 142 Threaded rod, 143 Rotating cover, 144 Connecting block, 15 Insert block, 16 Slot, 17 Telescopic support, 171 Threaded rod 1, 172 Threaded cylinder 1, 173 Rotating top sleeve, 174 Support plate, 18 Base, 19 Clamp, 20 Crossbar. Detailed Implementation

[0031] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0032] like Figures 3-9 As shown, a composite roof slab pre-support construction device is used to support the roof slab 3 of an advanced passageway. It includes a metal mesh 5, multiple rows of anchors 6, steel strips 7, and supporting beams 8. The metal mesh 5 is laid on the surface of the roof slab 3. The metal mesh 5 is a mesh body composed of several pieces of steel mesh spliced ​​together. Each piece of steel mesh is small in weight and volume, which facilitates the transportation and assembly of the metal mesh 5. Adjacent pieces of steel mesh overlap, and the edges of adjacent pieces overlap by at least 100mm. The overlaps of adjacent pieces of steel mesh are tied and fixed together, thus connecting and fixing multiple pieces of steel mesh together. The steel mesh used is φ4mm 1200mm×3000mm steel mesh with a mesh size of 40mm×40mm.

[0033] To enable the metal mesh 5 to be installed on the top plate 3, multiple rows of spaced anchors 6 are also provided on the top plate 3. One end of the anchor 6 is anchored upward into the top plate 3, and the other end of the anchor 6 extends downward out of the top plate 3. Figure 3 and Figure 4 As shown. Each row of anchors 6 includes multiple anchor rods 61 and anchor cables 62 arranged in a straight line. That is, each row of anchors 6 includes anchor rods 61 and anchor cables 62. The anchor rods 61 and anchor cables 62 in each row of anchors 6 are arranged alternately. The anchor rods 61 are high-strength anchor rods with a diameter of Ф22×2600mm. The length of the anchor rods 61 is less than that of the anchor cables 62. The anchor cables 62 are anchor cables with a diameter of Ф21.8×6000mm.

[0034] Anchor cable 62 is installed by drilling holes with an anchor cable machine and fixing it with an anchoring agent. The anchoring agent consists of 2 rolls of MSK2635 medium-speed quick-setting resin and 3 rolls of MSZ2635 fast-setting resin. The fast-setting resin roll is loaded first, followed by the medium-speed resin roll. The tensile strength of the installed anchor cable 62 is not less than 290KN.

[0035] A steel strip 7 is provided between the anchor rod 61 and the anchor cable 62 in each row of anchors 6. The steel strip 7 is a W-shaped steel strip 7 with an undulating surface. The steel strip 7 is arranged in a straight line, which is the same as the arrangement direction of the anchor rod 61 and the anchor cable 62 in a single row of anchors 6.

[0036] When the steel strip 7 is fixed, an anchor 9 is provided at the end of the anchor rod 61 to lock the steel strip 7 in place. Figure 6 As shown. Specifically, the end of the anchor bolt 61 passes through the metal mesh 5 and the steel strip 7 and is connected to the anchorage 9. The anchorage 9 includes a nut 91 and a tray 92. The tray 92 rests against the steel strip 7. To ensure a tight connection between the tray 92 and the steel strip 7, positioning strips 10 are provided on both sides of the tray 92. The positioning strips 10 are inserted into the undulating parts of the steel strip 7. The nut 91 and the anchor bolt 61 are threaded together. After tightening the nut 91, the nut 91 is tightly pressed against the tray 92, ensuring that the steel strip 7 can be tightly attached to the top plate 3. The length of the anchor bolt 61 protruding from the nut 91 is 10-50mm, while ensuring that the pre-tightening torque of the anchor bolt 61 is not less than 440 Nm and the pre-tightening force is not less than 105 KN.

[0037] Support beams 8 are installed between corresponding anchor cables 62 in the multi-row anchors 6. Since there are multiple anchor cables 62 arranged at intervals in each row of anchors 6, there are also multiple support beams 8. The support beams 8 are channel steel structures, and the support beams 8 and steel strips 7 are arranged perpendicularly. During installation, the ends of the anchor cables 62 pass through the steel strips 7 and are connected to the support beams 8 by anchorage 2 11. Specifically, the ends of the anchor cables 62 pass through the metal mesh 5, steel strips 7 and support beams 8 and are connected to anchorage 2 11. Anchorage 2 11 is an existing prestressed anchorage structure for anchor cables 62, which is existing technology and will not be described in detail here. The support beams 8 can be suspended and installed on the top plate 3 through anchorage 2 11, and the support beams 8 push the top plate 3 upward. The length of the anchor cable 62 protruding from anchorage 2 11 is 150-250mm, ensuring that the tensile force of the anchor cable 62 is not less than 290 KN.

[0038] Because the support beam 8 is arranged among multiple rows of anchors 6, and thus spans multiple steel strips 7, when the support beam 8 connects with the steel strips 7, rectangular slots 12 are provided on both sides of the support beam 8, which engage with the steel strips 7. This creates a certain degree of engagement between the steel strips 7 and the support beam 8, ensuring the reliability of the connection node and preventing misalignment between them. Figure 7 As shown.

[0039] After the joist 8 is installed, the joist 8, the steel strip 7, and the wire mesh 5 are arranged in sequence from bottom to top. The joist 8 and the steel strip 7 both tightly abut against the roof slab 3 upward, and thus the joist 8 and the steel strip 7 cooperate to press the wire mesh 5 tightly. Multiple joists 8 and multiple steel strips 7 are arranged horizontally and vertically to form a grid-shaped support structure. Through this structure, the wire mesh 5 can be supported evenly over a large area, ensuring that the wire mesh 5 tightly abuts against the surface of the roof slab 3. The lap joint of two adjacent steel笆nets corresponds to the steel strip 7 and the joist 8, ensuring that the splicing joint of the wire mesh 5 can also be reliably supported.

[0040] On the basis of using the joist 8 and the steel strip 7 to tightly support the wire mesh 5, a top mesh plate 13 is detachably arranged between two adjacent joists 8. The number of top mesh plates 13 between two adjacent joists 8 is multiple, and at least one top mesh plate 13 is arranged between two adjacent rows of anchor fittings 6, as Figure 5 shown. The top mesh plate 13 is bent into an arch shape and abuts against the lower side of the wire mesh 5. Through the top mesh plate 13, the wire mesh 5 corresponding to each grid space can be further supported.

[0041] The top mesh plate 13 includes an elastic steel plate 131 bent into an arch shape and hook plates 132 arranged at both ends of the elastic steel plate 131. The elastic steel plate 131 is in an arch shape, and the elastic steel plate 131 provides sufficient supporting force to support the wire mesh 5 upward.

[0042] Both ends of the elastic steel plate 131 are connected to the joist 8 through the hook plates 132. The hook plates 132 are in an inverted "L" shape and are arranged on both sides of the joist 8. The joist 8 supports the entire top mesh plate 13, as Figure 8 shown.

[0043] At the same time, telescopic rods 14 are arranged on the hook plates 132 at each end. The two telescopic rods 14 are arranged in an "eight" shape under the elastic steel plate 131. The telescopic rod 14 includes a threaded cylinder 141, a threaded rod 142, a rotating cover 143, and a docking block 144. One end of the threaded cylinder 172 is hinged to the hook plate 132. The threaded rod 142 is threadedly connected to the threaded cylinder 141. One end of the threaded rod 171 extends out of the threaded cylinder 141 and is then rotationally connected to the rotating cover 143. The rotating cover 143 only covers the end of the threaded rod 142, and the rotating cover can rotate relative to the threaded rod 142. A rectangular docking block 144 is hinged to the rotating cover 143.

[0044] When in use, the heads of the two telescopic rods 14 are brought close together and abut against the middle of the elastic steel plate 131, thereby supporting the top mesh plate 13. Specifically, unscrewing the threaded rod 142 causes the mating blocks 144 on the two telescopic rods 14 to gradually move closer. One mating block 144 has an insert 15 on top and a slot 16 below, while the other mating block 144 has a slot 16 on top and an insert 15 below, thus enabling mutual insertion and ensuring a stable connection between the mating blocks 144. After the mating blocks 144 are in the middle of the elastic steel plate 131, the threaded rod 142 is tightened again. At this time, the rotating cover 143 does not rotate. After the threaded rod 142 is unscrewed, the two mating blocks 144 are tightly connected, providing load-bearing support for the top mesh plate 13.

[0045] Based on the connection of the support beam 8 using anchor cable 62, in order to ensure the reliability of the support beam 8, one end of each support beam 8 is abutted against the hydraulic support and supported by the hydraulic support to prevent it from falling. At the same time, the other end of the support beam 8 is abutted against the coal wall 4, and a telescopic support 17 is provided at this end. The telescopic support 17 is vertically abutted against the coal seam, that is, the telescopic support 17 is abutted against the coal seam to be mined below the advance passage, and the support beam 8 is supported by the telescopic support 17.

[0046] The telescopic bracket 17 has a similar structure to the telescopic rod 14 described above. The telescopic bracket 17 includes a threaded rod 171, a threaded cylinder 172, a rotating top sleeve 173, and a support plate 174, as shown below. Figure 9 As shown. Threaded rod 171 is threadedly connected inside threaded cylinder 172. Threaded cylinder 172 and threaded rod 171 are arranged vertically. A base 18 is provided below threaded rod 171 to increase the contact area with the coal seam. A rotating top sleeve 173 is rotatably mounted on the top of threaded cylinder 172. The rotating top sleeve 173 is a hollow cylinder with a closed upper end and an open lower end. A support plate 174 is hinged to the upper part of the rotating top sleeve 173. The support plate 174 is bent into a "U" shape, and thus the cross-section of the support plate 174 is consistent with the cross-section of the support beam 8, which can hold the support beam 8, making the connection more reliable.

[0047] In addition, a clamp 19 is provided on the threaded cylinder 172. The clamp 19 has a two-part structure. After the two parts of the clamp 19 are connected and combined, the middle part of the clamp 19 is circular and the two sides are plate-shaped. After the two parts of the clamp 19 are bolted together and fixed, they are clamped to the outside of the threaded cylinder 141, realizing the connection and fixation between the clamp 19 and the threaded cylinder 172. Crossbars 20 are provided on both sides of the clamp 19. One end of the crossbar 20 extends horizontally and is embedded into the coal wall 4 of the advance channel, which improves the stability of the telescopic support 17 and reduces the impact on the telescopic support 17 during mining operations.

[0048] This utility model employs various multi-support and combined support methods for advanced passageways, particularly the combined support of anchor bolts 61, anchor cables 62, supporting beams 8, metal mesh 5, and steel strips 7. This effectively controls the deformation of the surrounding rock, provides suitable support strength, and avoids material waste. It not only enables advanced roof protection control before the broken roof 3 is exposed, but also transforms the advanced support from passive to active, achieving more stable and reliable advanced support than existing methods. This significantly improves the support strength, stability, and reliability of the advanced support. The safety of the backfilling and sealing after the frame is reliably improved, avoiding or reducing the occurrence of roof collapse accidents.

[0049] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A composite roof slab advanced support construction device for supporting the roof slab (3) of an advanced passageway, characterized in that, It includes a metal mesh (5), multiple rows of anchors (6), steel strips (7) and support beams (8). The metal mesh (5) is laid on the surface of the top plate (3). Multiple rows of anchors (6) are also provided on the top plate (3). Each row of anchors (6) includes multiple anchor rods (61) and anchor cables (62) arranged in a straight line. The steel strip (7) is provided between the anchor rod (61) and the anchor cable (62) in each row of anchors (6). An anchor (9) is provided at the end of the anchor rod (61) to lock the steel strip (7). A support beam (8) is provided between the corresponding anchor cables (62) in multiple rows of anchors (6). An anchor (11) is provided at the end of the anchor cable (62) after passing through the steel strip (7) to connect the support beam (8). The support beam (8) and the steel strip (7) are arranged vertically. The support beam (8), the steel strip (7) and the metal mesh (5) are arranged from bottom to top. The support beam (8) and the steel strip (7) cooperate to press the metal mesh (5). A top mesh plate (13) is detachably installed between two adjacent support beams (8), and the top mesh plate (13) is bent into an arch shape and rests against the metal mesh (5); one end of each support beam (8) rests against the hydraulic support and the other end is provided with a telescopic support (17), and the telescopic support (17) rests vertically against the coal seam.

2. The advanced support construction device for composite roof slabs according to claim 1, characterized in that, The metal mesh (5) is a mesh body made up of several pieces of steel mesh spliced ​​together. The two adjacent pieces of steel mesh overlap each other, and the overlap of the two adjacent pieces of steel mesh is tied and fixed. The overlap of the two adjacent pieces of steel mesh and the steel strip (7) correspond to the support beam (8).

3. The advanced support construction device for composite roof slabs according to claim 1, characterized in that, One end of the anchor (6) is anchored upward into the top plate (3), and the other end of the anchor (6) extends downward out of the top plate (3); the anchor rod (61) and anchor cable (62) in each row of anchors (6) are arranged alternately, and the length of the anchor rod (61) is less than that of the anchor cable (62).

4. The advanced support construction device for composite roof slabs according to claim 1, characterized in that, The steel strip (7) is a W steel strip (7). The end of the anchor rod (61) passes through the metal mesh (5) and the steel strip (7) and is connected to the anchor (9). The anchor (9) includes a nut (91) and a tray (92). The tray (92) rests against the steel strip (7). Positioning strips (10) are provided on both sides of the tray (92). The positioning strips (10) are inserted into the steel strip (7). The nut (91) is tightly pressed against the tray (92).

5. The advanced support construction device for composite roof slabs according to claim 4, characterized in that, The end of the anchor cable (62) passes through the metal mesh (5), steel strip (7) and support beam (8) and is connected to the second anchor (11). The support beam (8) is a channel steel structure, and slots (12) are opened on both sides of the support beam (8). The slots (12) are inserted into the steel strip (7).

6. The advanced support construction device for composite roof slabs according to claim 1, characterized in that, There are multiple top mesh plates (13) between two adjacent support beams (8), and at least one top mesh plate (13) is arranged between two adjacent rows of anchors (6). The top mesh plate (13) includes an elastic steel plate (131) bent into an arch shape and hook plates (132) set at both ends of the elastic steel plate (131). The elastic steel plate (131) is connected to the support beam (8) through the hook plates (132), and the elastic steel plate (131) pushes the metal mesh (5) upward.

7. The advanced support construction device for composite roof slabs according to claim 6, characterized in that, Each end of the hook plate (132) is provided with a telescopic rod (14). The two telescopic rods (14) are arranged in a figure-eight shape below the elastic steel plate (131). The heads of the two telescopic rods (14) are close to each other and abut against the middle of the elastic steel plate (131).

Images