Flexible formwork concrete gob-side entry retaining rigid pouring formwork

Abstract

The invention relates to the technical field of coal mine concrete gob-side entry retaining, and discloses a flexible formwork concrete gob-side entry retaining rigid pouring formwork which comprises a forward formwork and two lateral formworks, a plurality of water seepage windows are formed in the forward formwork, each lateral formwork is of a hollow structure, and an adjusting plate is inserted into the top of each lateral formwork. An arc-shaped plate is fixedly connected to the top of each adjusting plate, a storage groove is formed in each arc-shaped plate, a movable groove and a supporting hoop are formed in the side, facing the forward formwork, of each storage groove, and when the forward formwork is placed between the two lateral formworks, the forward formwork is inserted into an opening of the supporting hoop, and the inner side of the supporting hoop abuts against the outer walls of the two lateral formworks; a stable frame structure is formed by the forward formwork and the two lateral formworks. The formwork is convenient to disassemble and assemble, it is guaranteed that slurry leakage is avoided in the pouring process, practicability is higher, convenience is higher, all the components can be rapidly disassembled, repeated use is convenient, and therefore the use cost of the formwork is reduced, and the economic benefits of the formwork are improved.

Description

Technical Field

[0001] This invention relates to the field of coal mine concrete gob-side retention technology, specifically a flexible formwork for rigid casting of concrete gob-side retention. Background Technology

[0002] In underground coal mining, after the upper section of the working face is mined, the technology of leaving coal pillars to protect the roadway is usually adopted to excavate the roadway of the lower section of the working face. However, when the technology of leaving small coal pillars to protect the roadway is adopted, the surrounding rock deformation is large and difficult to maintain because the roadway is located in the area of ​​concentrated overburden support pressure. This poses a severe challenge to the safe and efficient production of coal mines. If the technology of leaving large coal pillars to protect the roadway is adopted, although the deformation of the surrounding rock is small, it leads to a large waste of coal resources. Traditional methods of leaving roadways along the goaf include timber stacks, dense pillars, gangue masonry, and concrete pouring. Later, high-water materials, flexible concrete, and the 101 construction method were developed. Among them, flexible concrete is widely used due to its advantages such as high strength of the cast body and simple process.

[0003] The flexible formwork concrete roadway retention technology uses "coal mine flexible formwork" high fiber filling bags, which have the advantages of self-forming, water permeability but no grout permeability, high strength, light weight and easy installation. However, it has the disadvantages of not being recyclable and high cost. According to calculations, the cost of flexible formwork accounts for nearly 40% of the total cost of roadway retention.

[0004] A search revealed that Chinese Patent Publication (Announcement) No. CN115749848A discloses a rigid casting template for flexible concrete along the goaf, comprising a casting template body, a first casting template, a second casting template, and side plates. The casting template body includes the first casting template and the second casting template. The first casting template is provided in multiple sets, and the multiple sets of the first casting template are evenly distributed in the horizontal and vertical directions. The first casting template includes a first groove, a second groove, a first locking block, and a second locking block. The top of the first casting template has a first groove, and the bottom of the first casting template is fixedly connected to a second locking block. The second locking block connected to the bottom of the upper first casting template is inserted into the interior of the first groove opened on the top of the lower first casting template. The whole is spliced ​​and fixed with bolts. After the casting is completed, the various parts can be quickly disassembled for removal and reuse.

[0005] However, the above-mentioned devices still have some shortcomings. The templates are installed with bolts, which are prone to rust after long-term use and are not convenient to disassemble and assemble. In addition, the templates are generally provided with seepage windows. Too many seepage windows can cause concrete slurry to overflow, while too few seepage windows result in poor water seepage effect, which reduces the practicality of the templates. Summary of the Invention

[0006] This invention provides a rigid casting formwork for flexible concrete with a goaf, to solve the problems mentioned in the background art, such as the inconvenience of installing and disassembling existing formworks by bolts and the improper use of seepage windows, which reduce the practicality of the formwork.

[0007] This invention provides a rigid casting formwork for flexible concrete with gob-side entry, including a forward formwork with multiple drainage windows. Two side templates are provided, each with a hollow structure. An adjustment plate is inserted into the top of each side template, and an arc-shaped plate is fixedly connected to the top of each adjustment plate. A storage slot is provided on the arc-shaped plate, and a movable slot is provided on the side of the storage slot facing the front template. The support hoop is designed as a portal frame structure. When the front template is placed between the two side templates, the front template is inserted into the opening of the support hoop, and the inner side of the support hoop abuts against the outer wall of the two side templates respectively. The support box is longer than the length of the front template. The side of the support box is inserted into two storage slots in sequence. The support box is equipped with a seepage mechanism, which acts on the seepage window to ensure good water permeability while preventing concrete slurry from seeping out.

[0008] Preferably, limit blocks are fixedly connected to both sides of the front template, and limit grooves are opened on the inner wall of each side template, with the limit grooves matching the limit blocks.

[0009] Preferably, the outer wall of the front template is symmetrically provided with slots, and each side template outer wall is symmetrically fixedly connected with a dovetail block. The inner wall of the support hoop is fixedly connected with a block, and the inner side wall of the support hoop is provided with a dovetail groove. The block and slot, and the dovetail groove and dovetail block are mutually compatible.

[0010] Preferably, each side template has a circular hole on its outer wall, and a bolt is inserted into the circular hole. The outer wall of the adjusting plate has multiple screw grooves vertically, and the inner wall of the screw grooves is threaded to the outer wall of the bolt. One of the adjusting plates has a feed port.

[0011] Preferably, the seepage mechanism includes a motor, the outer wall of which is mounted on the inner wall of the support box. A rectangular groove is provided on the top of the support box. A rotating shaft is installed at the output end of the motor. The side of the rotating shaft is connected to the inner wall of the support box through a bearing. A take-up roller is fixedly connected to the rotating shaft. A flexible membrane is fixedly connected to the take-up roller. After the flexible membrane passes through the rectangular groove, a baffle is fixedly connected to it.

[0012] Preferably, the length of the baffle is greater than the length of the rectangular groove, and the thickness of the baffle is less than the opening height of the movable groove. When the flexible membrane is unfolded, its inner wall abuts against the outer wall of the positive template.

[0013] Preferably, an inflation mechanism is symmetrically arranged inside the support box, and a connecting mechanism is symmetrically arranged on the rotating shaft to drive the inflation mechanism to work. The connecting mechanism includes an active cone wheel fixedly connected to the rotating shaft, and two active cone wheels are respectively arranged on both sides of the take-up roller. A driven cone wheel is meshed with the outer wall of the active cone wheel. A rotating rod is fixedly connected to the middle of the driven cone wheel. A support seat is connected to the rotating rod through a bearing. The support seat is fixedly connected to the outside of the support box. A rotating plate is fixedly connected downward to the bottom of the rotating rod through the support seat.

[0014] Preferably, the inflation mechanism includes a limiting frame and a piston cylinder. The top of the limiting frame is fixedly connected to the eccentric part of the rotating plate. A collar is sleeved on the limiting frame. A piston rod is fixedly connected to the outside of the collar. A piston plate is hinged to the side end of the piston rod. The outer wall of the piston plate abuts against the inside of the piston cylinder. The bottom of the piston cylinder is fixedly connected to the bottom wall of the support box.

[0015] Preferably, a one-way air intake valve is installed on each opposite side of the piston cylinder, and a threaded pipe is fixedly connected to the bottom of each piston cylinder. The bottom of the threaded pipe extends downward through the bottom wall of the support box, and a one-way air outlet valve is installed inside the threaded pipe.

[0016] Preferably, airbags are fixedly connected to both the side of the side template and the side facing away from the front template. One end of the air inlet pipe is fixedly connected to the top of the airbag, and the other end of the air inlet pipe is fixedly connected to a threaded connecting pipe. An air outlet plug is installed on the outside of the airbag.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention splices together a front template and side templates, with two limiting blocks inserted into corresponding limiting grooves to temporarily stabilize the rigid template. Support hoops are then inserted into multiple templates, allowing locking blocks to engage in locking grooves and dovetail blocks in dovetail slots. The front template and the two side templates form a stable frame structure, facilitating easy assembly and disassembly, preventing grout leakage during pouring, and ensuring a smooth wall surface. This enhances practicality and convenience, allowing for quick disassembly and repeated use, thereby reducing the template's operating costs and improving its economic efficiency.

[0018] This invention employs a combination of a motor, a take-up roller, and a flexible membrane. The take-up roller collects the flexible membrane, and the flexible membrane seals the seepage windows, thereby removing water from the concrete slurry. This results in higher strength and better support of the concrete after solidification, thus enhancing the practicality of the formwork.

[0019] This invention employs a combination of a driving cone wheel, a driven cone wheel, a rotating rod, a rotating plate, a piston rod, a piston plate, a piston cylinder, and an air bladder. The rotating plate drives the piston rod to move, causing the piston plate to reciprocate within the piston cylinder, rapidly inflating the air bladder and allowing it to fit tightly against uneven tunnel walls. This results in better grouting sealing and greater practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the connection between the front template and the two side templates of the present invention; Figure 3 This is a schematic diagram of the overall structure of the forward template of the present invention; Figure 4 This is a schematic diagram of the overall structure of the lateral template of the present invention; Figure 5 This is a schematic diagram of the overall structure of the support hoop of the present invention; Figure 6 This is a frontal view of the overall structure inside the support box of the present invention; Figure 7 This is a schematic diagram of the overall internal structure of the piston cylinder of the present invention; Figure 8 This is a schematic diagram of the overall structure of the piston plate in the piston cylinder during its movement, according to the present invention. Figure 9 This is a schematic diagram of the overall structure of the airbag of the present invention.

[0021] In the diagram: 100, forward template; 101, seepage window; 102, card slot; 103, limiting block; 200. Side template; 201. Dovetail block; 202. Limiting groove; 203. Round hole; 204. Bolt; 300. Adjusting plate; 301. Screw groove; 302. Feed inlet; 400. Curved plate; 401. Storage slot; 402. Movable slot; 500. Support hoop; 501. Clamping block; 502. Dovetail groove; 600, support box; 601, rectangular groove; 700. Water seepage mechanism; 701. Motor; 702. Rotating shaft; 703. Take-up roller; 704. Flexible membrane; 705. Baffle; 800. Connecting mechanism; 801. Driving cone wheel; 802. Driven cone wheel; 803. Rotating rod; 804. Support base; 805. Rotating plate; 900. Inflation mechanism; 901. Limiting frame; 902. Collar; 903. Piston rod; 904. Piston plate; 905. Piston cylinder; 906. One-way inlet valve; 907. Threaded pipe; 908. One-way outlet valve; 1100. Airbag; 1101. Intake pipe; 1102. Threaded connecting pipe; 1103. Exhaust plug. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention discloses a flexible formwork for rigid casting of concrete along the goaf, such as... Figure 1-9 As shown, it includes: a forward template 100, on which multiple seepage windows 101 are provided; It should be noted that the two side templates 200 are hollow structures. Each side template 200 has an adjustment plate 300 inserted into its top. Each adjustment plate 300 has an arc plate 400 fixedly connected to its top. The arc plate 400 has a storage groove 401. The storage groove 401 has a movable groove 402 on the side facing the front template 100. It should be noted that the support hoop 500 is designed as a door-shaped structure. When the front template 100 is placed between the two side templates 200, the front template 100 is inserted into the opening of the support hoop 500, and the inner side of the support hoop 500 abuts against the outer wall of the two side templates 200 respectively. In addition, the support box 600 is longer than the length of the front template 100. The side of the support box 600 is inserted into two storage slots 401 in sequence. The support box 600 is equipped with a water seepage mechanism 700. The water seepage mechanism 700 acts on the water seepage window 101, so that the water seepage window 101 maintains good water seepage while preventing concrete grout from seeping out. The water seepage window 101 can remove water from the concrete grout, so that the concrete has greater strength after solidification.

[0024] Specifically, limit blocks 103 are fixedly connected to both sides of the front template 100, and limit grooves 202 are opened on the inner wall of each side template 200. The limit grooves 202 are adapted to the limit blocks 103.

[0025] It should be noted that the outer wall of the positive template 100 is symmetrically provided with slots 102, and the outer wall of each side template 200 is symmetrically fixedly connected with dovetail blocks 201. The inner wall of the support hoop 500 is fixedly connected with a block 501, and the inner side wall of the support hoop 500 is provided with a dovetail groove 502. The block 501 and the slot 102, and the dovetail groove 502 and the dovetail block 201 are mutually compatible.

[0026] It should be noted that each lateral template 200 has a circular hole 203 on its outer wall, and a bolt 204 is inserted into the circular hole 203. The outer wall of the adjusting plate 300 has multiple vertically formed screw grooves 301, and the inner wall of the screw grooves 301 is threadedly connected to the outer wall of the bolt 204. One of the adjusting plates 300 has a feed port 302. In use, the operator can adjust the height of the arc plate 400 by pulling the adjusting plate 300 upward, so that the top of the arc plate 400 abuts against the top of the tunnel. After the adjustment is completed, the bolt 204 is rotated to connect into the corresponding screw groove 301 to fix the position of the adjusting plate 300. The operation is convenient, the adjustment is flexible, and the practicality is strong. Furthermore, the arc plate 400 is made of a plate with a certain degree of elasticity, which has a certain deformation capacity when it fits the tunnel, so that the connection between the two is tighter.

[0027] The working principle of the above technical solution is as follows: 1. First, according to the design of the roadway along the goaf and the slope of the roadway top and bottom plates, steel or high-strength polyurethane material can be used to make rigid templates of the corresponding size. After the coal is cut and the support is moved at the working face, the space to be poured is temporarily supported by hydraulic single columns according to the design of leaving the roadway along the goaf. In the space to be poured, the loose coal is cleared to the solid bottom. The front formwork 100 and the side formwork 200 are placed on the roadway floor according to the roadway position. The installation of the side formwork 200 needs to ensure that space is left for demolding after the concrete has solidified and hardened. The front template 100 and the side template 200 are spliced ​​together, and the two limiting blocks 103 are respectively inserted into the corresponding limiting grooves 202 to temporarily stabilize the rigid template. Then, the support hoop 500 is inserted into multiple templates, so that the locking block 501 is inserted into the locking groove 102 and the dovetail block 201 is inserted into the dovetail groove 502. The front template 100 and the two side templates 200 form a stable frame structure. Apply release agent to the inner walls of the front formwork 100, side formwork 200 and support hoop 500, insert the grouting pipe into the inlet 302 and tie it, start pumping the mixed concrete, and after the concrete has solidified, first remove the support hoop 500, then dismantle the front formwork 100 and side formwork 200, and finally remove the temporary hydraulic single column support to start the next cycle, and repeat this process. In one specific embodiment: the seepage mechanism 700 includes a motor 701, the outer wall of the motor 701 is mounted on the inner wall of the support box 600, the top of the support box 600 is provided with a rectangular groove 601, the output end of the motor 701 is mounted with a rotating shaft 702, the side of the rotating shaft 702 is connected to the inner wall of the support box 600 through a bearing, a take-up roller 703 is fixedly connected to the rotating shaft 702, a flexible film 704 is fixedly connected to the take-up roller 703, and a baffle 705 is fixedly connected to the flexible film 704 after passing through the rectangular groove 601.

[0028] In addition, the length of the baffle 705 is greater than the length of the rectangular groove 601, and the thickness of the baffle 705 is less than the opening height of the movable groove 402. When the flexible membrane 704 is unfolded, its inner wall abuts against the outer wall of the positive template 100.

[0029] The working principle of the above technical solution is as follows: During use, the support box 600 is first inserted into the storage slot 401 on the arc plate 400. The motor 701 drives the rotating shaft 702 to rotate, which in turn drives the winding roller 703 to rotate. At this time, the wound flexible film 704 begins to loosen. The operator pulls the baffle 705 to move the flexible film 704. The flexible film 704 passes through the movable slot 402 on the storage slot 401, so that the flexible film 704 covers the forward template 100. It should be noted that this step needs to be performed before installing the support hoop 500, or the support hoop 500 can be temporarily removed. The support hoop 500 disengages from the slot 102 on the forward template 100, creating a gap between the support hoop 500 and the forward template 100 that allows the baffle 705 to pass through. When the flexible membrane 704 covers the multiple permeation windows 101, the support hoop 500 is then tightly connected to the forward template 100, which also quickly fixes the position of the flexible membrane 704, facilitating its permeation. After the mold is used, the support hoop 500 is removed, and the motor 701 is started to drive the rotating shaft 702 to reverse, winding up the flexible membrane 704. This quick and convenient process allows the flexible membrane 704 to be reused, resulting in higher economic benefits.

[0030] In a specific embodiment: an inflation mechanism 900 is symmetrically arranged inside the support box 600, and a connecting mechanism 800 is symmetrically arranged on the rotating shaft 702 to drive the inflation mechanism 900 to work. The connecting mechanism 800 includes an active cone wheel 801 fixedly connected to the rotating shaft 702, and the two active cone wheels 801 are respectively arranged on both sides of the take-up roller 703. A driven cone wheel 802 is meshed with the outer wall of the active cone wheel 801. A rotating rod 803 is fixedly connected to the middle of the driven cone wheel 802. A support seat 804 is connected to the rotating rod 803 through a bearing. The support seat 804 is fixedly connected to the outside of the support box 600. A rotating plate 805 is fixedly connected downward to the bottom of the rotating rod 803 through the support seat 804.

[0031] It should be noted that the inflation mechanism 900 includes a limiting frame 901 and a piston cylinder 905. The top of the limiting frame 901 is fixedly connected to the eccentric part of the rotating plate 805. A collar 902 is sleeved on the limiting frame 901. A piston rod 903 is fixedly connected to the outside of the collar 902. A piston plate 904 is hinged to the side end of the piston rod 903. The outer wall of the piston plate 904 abuts against the inside of the piston cylinder 905. The bottom of the piston cylinder 905 is fixedly connected to the bottom wall of the support box 600.

[0032] It should be noted that a one-way air intake valve 906 is installed on each side of the piston cylinder 905, and a threaded tube 907 is fixedly connected to the bottom of the piston cylinder 905. The bottom of the threaded tube 907 extends downward through the bottom wall of the support box 600, and a one-way air outlet valve 908 is installed inside the threaded tube 907.

[0033] In addition, airbags 1100 are fixedly connected to the side of the side template 200 facing away from the front template 100. One end of the air inlet pipe 1101 is fixedly connected to the top of the airbag 1100, and the other end of the air inlet pipe 1101 is fixedly connected to the threaded connecting pipe 1102. An air outlet plug 1103 is installed on the outside of the airbag 1100.

[0034] The working principle of the above technical solution is as follows: During use, the rotating shaft 702 drives the active cone wheel 801 to rotate, and through meshing, drives the driven cone wheel 802 to rotate. At this time, the rotating rod 803 drives the rotating plate 805 to rotate, and the limiting frame 901 drives the collar 902 to move around the rotating rod 803, thereby driving the piston rod 903 to reciprocate. The piston rod 903 drives the piston plate 904 to move inside the piston cylinder 905, connecting the threaded connecting pipe 1102 on the airbag 1100 with... The piston cylinder 905 is connected to the threaded pipe 907. Air is introduced through the one-way air inlet valve 906 and then discharged through the one-way air outlet valve 908. The discharged air enters the airbag 1100, causing the airbag 1100 to expand. This allows it to better fit the inner wall of the tunnel. The airbag 1100 has deformation capabilities, so it can fit tightly even on uneven inner walls of the tunnel. This results in better grout sealing and greater practicality. After the grout solidifies, the air outlet plug 1103 can be opened directly to release the air from the airbag 1100, which is quick and convenient.

[0035] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible formwork for rigid casting of concrete along a goaf, characterized in that, include A positive template (100) is provided with multiple seepage windows (101). Two side templates (200) are provided, each side template (200) is hollow, and an adjustment plate (300) is inserted into the top of each side template (200). An arc plate (400) is fixedly connected to the top of each adjustment plate (300). A storage slot (401) is provided on the arc plate (400), and an movable slot (402) is provided on the side of the storage slot (401) facing the front template (100). The support hoop (500) is configured as a door-shaped structure. When the front template (100) is placed between the two side templates (200), the front template (100) is inserted into the opening of the support hoop (500), and the inner side of the support hoop (500) abuts against the outer wall of the two side templates (200). A support box (600) is provided, the length of which is greater than the length of the forward template (100). The side of the support box (600) is inserted into two storage slots (401) in sequence. A water seepage mechanism (700) is provided inside the support box (600). The water seepage mechanism (700) acts on the water seepage window (101) so that the water seepage window (101) maintains good water permeability while preventing concrete slurry from seeping out.

2. The flexible formwork for rigid casting of concrete along the goaf as described in claim 1, characterized in that: Both sides of the forward template (100) are fixedly connected to limit blocks (103), and each side template (200) has a limit groove (202) on its inner wall, and the limit groove (202) is adapted to the limit block (103).

3. The flexible formwork for rigid casting of concrete along the goaf as described in claim 1, characterized in that: The outer wall of the forward template (100) is symmetrically provided with slots (102), and each side template (200) is symmetrically fixedly connected with a dovetail block (201) on its outer wall. The inner wall of the support hoop (500) is fixedly connected with a block (501), and the inner side wall of the support hoop (500) is provided with a dovetail groove (502). The block (501) and the slot (102), and the dovetail groove (502) and the dovetail block (201) are mutually compatible.

4. The flexible formwork for rigid casting of concrete along the goaf as described in claim 1, characterized in that: Each side template (200) has a circular hole (203) on its outer wall, and a bolt (204) is inserted into the circular hole (203). The outer wall of the adjustment plate (300) has multiple screw grooves (301) vertically, and the inner wall of the screw groove (301) is threaded to the outer wall of the bolt (204). One of the adjustment plates (300) has a feed port (302).

5. The flexible formwork for rigid casting of concrete along the goaf as described in claim 1, characterized in that: The water seepage mechanism (700) includes a motor (701), the outer wall of which is mounted on the inner wall of the support box (600). A rectangular groove (601) is provided on the top of the support box (600). A rotating shaft (702) is installed at the output end of the motor (701). The side of the rotating shaft (702) is connected to the inner wall of the support box (600) through a bearing. A take-up roller (703) is fixedly connected to the rotating shaft (702). A flexible membrane (704) is fixedly connected to the take-up roller (703). After the flexible membrane (704) passes through the rectangular groove (601), a baffle (705) is fixedly connected to it.

6. A flexible formwork template for rigid casting of concrete along a goaf, as described in claim 5, characterized in that: The length of the baffle (705) is greater than the length of the rectangular groove (601), and the thickness of the baffle (705) is less than the opening height of the movable groove (402). When the flexible membrane (704) is unfolded, its inner wall abuts against the outer wall of the positive template (100).

7. A flexible formwork template for rigid casting of concrete along a goaf, as described in claim 5, characterized in that: An inflation mechanism (900) is symmetrically arranged inside the support box (600). A connecting mechanism (800) is symmetrically arranged on the rotating shaft (702) to drive the inflation mechanism (900) to work. The connecting mechanism (800) includes an active cone wheel (801) fixedly connected to the rotating shaft (702), and the two active cone wheels (801) are respectively arranged on both sides of the take-up roller (703). A driven cone wheel (802) is meshed with the outer wall of the active cone wheel (801). A rotating rod (803) is fixedly connected to the middle of the driven cone wheel (802). A support seat (804) is connected to the rotating rod (803) through a bearing. The support seat (804) is fixedly connected to the outside of the support box (600). A rotating plate (805) is fixedly connected downward to the bottom of the rotating rod (803) through the support seat (804).

8. A flexible formwork template for rigid casting of concrete along a goaf, as described in claim 7, characterized in that: The inflation mechanism (900) includes a limiting frame (901) and a piston cylinder (905). The top of the limiting frame (901) is fixedly connected to the eccentric part of the rotating plate (805). A collar (902) is sleeved on the limiting frame (901). A piston rod (903) is fixedly connected to the outside of the collar (902). A piston plate (904) is hinged to the side end of the piston rod (903). The outer wall of the piston plate (904) abuts against the inside of the piston cylinder (905). The bottom of the piston cylinder (905) is fixedly connected to the bottom wall of the support box (600).

9. A flexible formwork template for rigid casting of concrete along a goaf, as described in claim 8, characterized in that: One-way air inlet valve (906) is installed on each side of the piston cylinder (905). A threaded pipe (907) is fixedly connected to the bottom of the piston cylinder (905). The bottom of the threaded pipe (907) extends downward through the bottom wall of the support box (600). A one-way air outlet valve (908) is installed inside the threaded pipe (907).

10. A flexible formwork template for rigid casting of concrete along a goaf, as described in claim 1, characterized in that: The side template (200) is fixedly connected to an airbag (1100) on the side opposite to the front template (100). An air inlet pipe (1101) is fixedly connected to the top of the airbag (1100), and a threaded connecting pipe (1102) is fixedly connected to the other end of the air inlet pipe (1101). An air outlet plug (1103) is installed on the outside of the airbag (1100).

Images