Steel pipe concrete support system and construction method for preventing and treating roadway thermal dynamic disasters

Abstract

The application discloses a kind of steel pipe concrete support system and construction method for preventing and treating roadway thermodynamic disaster, the support system is spliced by multiple steel pipe concrete support structures along the direction of roadway extension, steel pipe concrete support structure includes: steel pipe concrete arch support and arch fire-retardant fiber plate;The arch fire-retardant fiber plate is composed of two layers of corrugated steel plates and the middle fire-retardant fiber layer, the bottom surface of both ends of the arch fire-retardant fiber plate is fixed on the ground of roadway by bottom support, steel pipe concrete arch support is buried in the trough of outer corrugated steel plate of arch fire-retardant fiber plate, the both ends of steel pipe concrete arch support are provided with multiple bolts, hole slot is set on the corresponding position of bottom support, and steel pipe concrete arch support is connected with bottom support by bolt and hole slot insertion fitting cooperation.The system can effectively hinder the transmission of heat, play the role of support isolation, and protect the personnel and disaster relief personnel in the support system when disaster occurs.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of roadway support, and relates to a steel pipe concrete support system for preventing and treating thermal dynamic disasters in a roadway and a construction method. BACKGROUND

[0002] In recent years, with the rapid development of the economy and society, the demand for resources of human beings is increasing, and the mineral resources in the shallow part of the earth are decreasing, and the mining of mineral resources is moving to the deep part of the earth. The engineering disasters such as soft rock large deformation, rock burst, heat damage and gas outburst caused by the increasing mining depth have brought great challenges to deep mining engineering, and seriously threaten the production safety of the mine. Once a thermal dynamic disaster occurs, it will cause serious damage, casualties and huge economic losses. Therefore, it is urgent to design a support system for preventing and treating thermal dynamic disasters in a deep roadway to effectively hinder the transfer of heat and play a supporting and isolating role. SUMMARY

[0003] To solve the above technical problems, the purpose of the present application is to provide a steel pipe concrete support system for preventing and treating thermal dynamic disasters in a roadway and a construction method, which can effectively hinder the transfer of heat and play a supporting and isolating role, and protect the personnel working in the support system and the disaster relief personnel when the disaster occurs.

[0004] The present application provides a steel pipe concrete support system for preventing and treating thermal dynamic disasters in a roadway, which is composed of a plurality of steel pipe concrete support structures spliced along the extension direction of the roadway. The steel pipe concrete support structure comprises a steel pipe concrete arch support and an arch-shaped flame-retardant fiber plate. The arch-shaped flame-retardant fiber plate is composed of inner and outer two layers of corrugated steel plates and a middle flame-retardant fiber layer. The bottom surface of the two ends of the arch-shaped flame-retardant fiber plate is fixed on the ground of the roadway through a bottom support. The steel pipe concrete arch support is embedded in the wave trough of the outer layer of the corrugated steel plate of the arch-shaped flame-retardant fiber plate. A plurality of pins are arranged at the two ends of the steel pipe concrete arch support. A plug hole is arranged at the corresponding position of the bottom support. The steel pipe concrete arch support and the bottom support are connected through the plug-in cooperation of the pins and the plug hole.

[0005] In the steel pipe concrete support system for preventing and treating thermal dynamic disasters in a roadway of the present application, the arch-shaped flame-retardant fiber plate is composed of a plurality of arc-shaped flame-retardant fiber plates. The circumferential end faces of the inner and outer two layers of corrugated steel plates of the arc-shaped flame-retardant fiber plate are provided with circumferential joint structures. The circumferential joint structure comprises a trapezoidal protrusion arranged on the circumferential end face of one side of the corrugated steel plate and a trapezoidal groove arranged on the circumferential end face of the other side. The trapezoidal protrusion of the adjacent corrugated steel plate and the trapezoidal groove are matched with each other. The trapezoidal protrusion and the trapezoidal groove on the circumferential end face of the outer layer of the corrugated steel plate adopt an intermittent structure at the corresponding wave trough to facilitate the embedding of the steel pipe concrete arch support.

[0006] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the trapezoidal protrusions and the trapezoidal grooves are provided with reserved bolt holes, and the trapezoidal protrusions and the trapezoidal grooves after being inserted are connected by bolts.

[0007] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the steel pipe concrete support structures are connected by the longitudinal joint structures arranged on the longitudinal end faces of the corrugated steel plates to form the steel pipe concrete support system.

[0008] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the longitudinal joint structure is connected by gradually inserting the male joint into the female joint, compressing and shortening the high-strength spring, and then inserting the high-strength spring into the circular hole groove.

[0009] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the bottom of the inner corrugated steel plate is provided with a flange connection structure including a pair of flanges, a gasket and connecting bolts.

[0010] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the steel pipe concrete arch support is uniformly provided with a plurality of bolt holes along the ring direction, and the inner and outer corrugated steel plates and the intermediate fire-retardant fiber layer of the arch-shaped fire-retardant fiber plate are also provided with bolt holes.

[0011] In the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, the fire-retardant fiber layer material is aramid.

[0012] The application further provides a construction method of the steel pipe concrete support system for preventing and treating roadway thermal dynamic disasters, which comprises the following steps.

[0013] Step 1: arranging bottom supports at the bottoms of the left and right ends of the deep roadway.

[0014] Step 2: support along the inner wall of the deep roadway using the steel pipe concrete arch support, so that the arch support is completely attached to the rock wall; the pins at the two ends of the steel pipe concrete arch support are inserted into the hole groove of the bottom support, so that the steel pipe concrete arch support is connected with the bottom support;

[0015] Step 3: assemble the inner and outer two layers of corrugated steel plates and the fire-retardant fiber layer to form a sandwiched arc-shaped fire-retardant fiber plate;

[0016] Step 4: splice a plurality of arc-shaped fire-retardant fiber plates into an arch-shaped fire-retardant fiber plate through the annular joint structure, and fix the two end bottom surfaces of the arch-shaped fire-retardant fiber plate to the bottom support;

[0017] Step 5: embed the steel pipe concrete arch support in the trough of the outer corrugated steel plate of the arch-shaped fire-retardant fiber plate, connect the steel pipe concrete arch support with the arch-shaped fire-retardant fiber plate through long bolts, and assemble into a steel pipe concrete support structure;

[0018] Step 6: repeat steps 2 to 5 to assemble a plurality of steel pipe concrete support structures, splice adjacent steel pipe concrete support structures through the longitudinal joint structure, and reinforce and connect through the flange connection structure arranged at the bottom of the inner corrugated steel plate, so as to form a stable support system.

[0019] The steel pipe concrete support system and construction method for preventing and treating thermal dynamic disasters in a roadway of the present application have at least the following beneficial effects:

[0020] 1. By arranging the fire-retardant fiber layer between the two layers of corrugated steel plates, a sandwiched fire-retardant fiber plate is formed. As an isolation layer, it can effectively block the transfer of heat when a thermal dynamic disaster occurs, providing protection for the construction personnel in the roadway, improving the anti-thermal dynamic disaster capability of the deep roadway, prolonging the service life of the deep roadway, and reducing the technical cost.

[0021] 2. The steel pipe concrete arch support is supported along the inner wall of the deep roadway, completely attached to the rock wall and embedded in the trough of the outer layer of the spliced fire-retardant fiber plate. The two are matched and assembled, and each unit is connected one by one to form the entire system. This arrangement makes the outer wall smooth, which can be closely attached to the external surrounding rock, making the support system more stable and improving the strength and durability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the support system of the present application;

[0023] Figure 2 It is a schematic diagram of the structure of the inner corrugated steel plate of the present application;

[0024] Figure 3 It is a schematic diagram of the structure of the outer corrugated steel plate of the present application;

[0025] Figure 4 The splicing schematic diagram of the longitudinal joint structure of the application;

[0026] Figure 5 The splicing schematic diagram of the longitudinal joint structure of the application;

[0027] Figure 6 The splicing schematic diagram of the longitudinal joint structure of the application;

[0028] Figure 7 The schematic diagram of the flange connection structure;

[0029] Figure 8 The schematic diagram of the steel pipe concrete arch support of the application;

[0030] Figure 9 The splicing detail of the steel pipe concrete arch support and the bottom support.

[0031] Wherein, 1-steel pipe concrete arch support, 11-peg, 12-screw hole, 2-arch fireproof fiber plate, 21-inner corrugated steel plate, 22-outer corrugated steel plate, 23-fireproof fiber layer, 3-bottom support, 31-socket, 4-circumferential joint structure, 41-trapezoidal protrusion, 42-trapezoidal groove, 5-longitudinal joint structure, 6-male joint, 61-circular truncated cone protrusion, 62-high-strength spring, 7-female joint, 71-circular truncated cone groove, 72-circular hole groove, 8-flange connection structure, 81-flange, 82-gasket, 83-connecting bolt. DETAILED DESCRIPTION

[0032] As Figures 1 to 9 shown, the steel pipe concrete support system for preventing and treating deep roadway thermodynamic disasters of the application is spliced by multiple steel pipe concrete support structures along the extension direction of the roadway. The steel pipe concrete support structure comprises a steel pipe concrete arch support 1 and an arch fireproof fiber plate 2. The arch fireproof fiber plate 2 is composed of an inner corrugated steel plate 21, an outer corrugated steel plate 22 and a middle fireproof fiber layer 23. The bottom surfaces of the two ends of the arch fireproof fiber plate 2 are fixed on the ground of the roadway through a bottom support 3, the steel pipe concrete arch support 1 is embedded in the valleys of the outer corrugated steel plate 22 of the arch fireproof fiber plate 2, the two ends of the steel pipe concrete arch support 1 are provided with multiple pegs 11, the bottom support 3 is provided with a socket 31 at the corresponding position, and the steel pipe concrete arch support 1 and the bottom support 3 are connected through the peg 11 and the socket 31. The fireproof fiber layer material is aramid fiber, which has excellent electrical insulation and heat resistance, high fire resistance, and can be used as a barrier layer to effectively resist thermodynamic disasters.

[0033] As Figures 2 to 4As shown, the arched fire-retardant fiberboard 2 is composed of a plurality of arc-shaped fire-retardant fiberboards, and the inner and outer layers of corrugated steel plates are provided with ring joint structures 4 on the ring end faces, which are sliding pin joint structures. Figure 2 and Figure 3 As shown, the ring joint structure 4 includes a trapezoidal protrusion 41 on one side of the ring end face of the corrugated steel plate and a trapezoidal groove 42 on the other side, and the trapezoidal protrusions 41 and the trapezoidal grooves 42 of adjacent corrugated steel plates are inserted in an interlaced manner to form a stable connection. Figure 3 As shown, the trapezoidal protrusions 41 and the trapezoidal grooves 42 on the ring end face of the outer layer of corrugated steel plates are discontinuous at the corresponding valleys to facilitate the embedding of the steel pipe concrete arched support. The trapezoidal protrusions 41 and the trapezoidal grooves 42 are provided with reserved screw holes, and the inserted trapezoidal protrusions and trapezoidal grooves are connected by bolts.

[0034] As shown, Figure 5 and 6 A plurality of steel pipe concrete support structures are connected by longitudinal joint structures 5 provided on the longitudinal end faces of the corrugated steel plates to form a steel pipe concrete support system. The longitudinal joint structure 5 includes a male joint 6 provided on one side of the longitudinal end face of the corrugated steel plate and a female joint 7 provided on the other side. The male joint 6 includes a round table type protrusion 61 with a small front and a large back, and high-strength springs 62 fixed to the upper and lower sides of the middle part of the protrusion. The female joint includes a round table type groove 71 and circular holes 72 on the upper and lower sides of the middle part of the round table type groove.

[0035] When the longitudinal joint structure is inserted, as the male joint 6 is gradually inserted into the female joint 7, the high-strength springs 62 are gradually compressed and shortened until the high-strength springs 62 are completely inserted into the circular holes 72, and the high-strength springs 62 are limited by the circular holes 72 after restoring to the original length, so that the longitudinal joint structure is completed. The high-strength compression spring 62 has good strength and is not easy to deform and break. The characteristics of the high-strength compression spring 62 are used to realize the fastening connection of the longitudinal joint structure.

[0036] As shown, Figure 7 The bottom of the inner layer of corrugated steel plates 21 is provided with a flange connection structure 8, which includes a pair of flanges 81, a gasket 82 and a connecting bolt 83. A pair of flanges 81 are provided on two longitudinally adjacent inner layer of corrugated steel plates 21, and a pre-tightening force is applied to the pair of flanges by the connecting bolt 83, so that the gasket 82 between the flange sealing surfaces is compressed and becomes solid, and the uneven gap between the two flange sealing surfaces is filled, so that the longitudinal connection of adjacent steel pipe concrete support structures is more stable.

[0037] As shown, Figure 8As shown, the steel-concrete arch support 1 is uniformly provided with multiple bolt holes 12 along its circumference. Bolt holes 12 are also provided at corresponding locations on the inner and outer corrugated steel plates and the intermediate flame-retardant fiber layer of the arch-shaped flame-retardant fiberboard. Long bolts are used to connect the steel-concrete arch support to the arch-shaped flame-retardant fiberboard, forming a stable support system. In the event of a thermal disaster, the arch-shaped flame-retardant fiberboard can effectively prevent the transfer and diffusion of heat, reduce damage to the steel-concrete arch support, delay the failure of the entire support system, and buy time for rescue operations.

[0038] The construction method of the steel-concrete composite support system for preventing thermal disasters in deep roadways according to the present invention includes the following steps:

[0039] Step 1: Install bottom supports at both ends of the deep tunnel;

[0040] Step 2: Use steel pipe concrete arch supports to support the inner wall of the deep tunnel, so that the arch supports are completely in contact with the rock wall; insert the pins at both ends of the steel pipe concrete arch supports into the slots of the bottom support to connect the steel pipe concrete arch supports to the bottom support.

[0041] Step 3: Assemble the inner and outer corrugated steel sheets and the flame-retardant fiber layer to form a sandwich-style arc-shaped flame-retardant fiber board;

[0042] Step 4: Splice multiple arc-shaped flame-retardant fiberboards into an arched flame-retardant fiberboard using a circumferential joint structure, and fix the bottom surfaces of both ends of the arched flame-retardant fiberboard to the bottom support.

[0043] Step 5: Embed the steel-concrete arch support in the trough of the outer corrugated steel plate of the arch flame-retardant fiberboard, and connect the steel-concrete arch support to the arch flame-retardant fiberboard with long bolts to assemble the steel-concrete support structure.

[0044] Step 6: Repeat steps 2 to 5 to assemble multiple steel-concrete composite support structures. Connect adjacent steel-concrete composite support structures through longitudinal joint structures and reinforce the connection through flange connection structures set at the bottom of the inner corrugated steel plate to form a stable support system.

[0045] The above construction process allows for the assembly of an effective support and isolation system with a long service life. The arched flame-retardant fiberboard with a sandwich structure enhances the support effect of the system. Simultaneously, the flame-retardant fiber layer does not burn or burns incompletely upon contact with a fire source, and it self-extinguishes quickly after the fire source is removed, slowing the spread of flames and preventing large-scale combustion. Therefore, using this system can effectively prevent thermal disasters in deep tunnels and reduce economic losses.

[0046] The above merely describes preferred embodiments of the present application and is not used to limit the idea of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel pipe concrete support system for preventing and treating a thermal dynamic disaster in a tunnel, characterized in that, A plurality of steel pipe concrete support structures are spliced along the roadway extension direction, the steel pipe concrete support structure comprises: a steel pipe concrete arch support and an arch-shaped flame-retardant fiber plate; the arch-shaped flame-retardant fiber plate is composed of inner and outer two layers of corrugated steel plates and a middle flame-retardant fiber layer, the bottom surface of the two ends of the arch-shaped flame-retardant fiber plate is fixed on the ground of the roadway through a bottom support, the steel pipe concrete arch support is embedded in the wave trough of the outer layer corrugated steel plate of the arch-shaped flame-retardant fiber plate, a plurality of plugs are arranged at the two ends of the steel pipe concrete arch support, and a plug hole is arranged at the corresponding position of the bottom support; the steel pipe concrete arch support is connected with the bottom support through the plug-in cooperation of the plug and the plug hole.

2. The steel tube reinforced concrete support system for preventing and treating a heat power disaster in a tunnel according to claim 1, wherein The arch-shaped flame-retardant fiber plate is composed of a plurality of arc-shaped flame-retardant fiber plates, and the circumferential end faces of the inner and outer two layers of corrugated steel plates of the arc-shaped flame-retardant fiber plate are provided with circumferential joint structures, the circumferential joint structure comprises a trapezoidal protrusion arranged on the circumferential end face of one side of the corrugated steel plate and a trapezoidal groove arranged on the circumferential end face of the other side, and the trapezoidal protrusion and the trapezoidal groove of the adjacent corrugated steel plates are matched with each other; the trapezoidal protrusion and the trapezoidal groove on the circumferential end face of the outer layer corrugated steel plate adopt an intermittent structure at the corresponding wave trough, so that the steel pipe concrete arch support is embedded conveniently.

3. The steel-tube concrete support system for preventing and treating a heat- power disaster in a tunnel according to Claim 2, wherein The trapezoidal protrusion and the trapezoidal groove of the circumferential joint structure are provided with reserved screw holes, and the inserted trapezoidal protrusion and trapezoidal groove are connected by bolts.

4. The steel tube reinforced concrete support system for preventing and treating a heat power disaster in a tunnel according to claim 1, wherein A plurality of steel pipe concrete support structures are spliced to form a steel pipe concrete support system through longitudinal joint structures arranged on the longitudinal end faces of the corrugated steel plates; the longitudinal joint structure comprises a male joint arranged on one side of the longitudinal end face of the corrugated steel plate and a female joint arranged on the other side of the longitudinal end face, the male joint comprises a circular truncated cone protrusion with a small front and a large back and high-strength springs fixed on the upper and lower sides of the middle part of the protrusion, and the female joint comprises a circular truncated cone groove and circular holes on the upper and lower sides of the middle part of the circular truncated cone groove.

5. The steel tube reinforced concrete support system for preventing and treating a heat power disaster in a tunnel according to claim 4, wherein With the gradual insertion of the male joint into the female joint, the high-strength springs are gradually compressed and shortened, until the high-strength springs completely enter the circular holes, and the high-strength springs are limited by the circular holes after restoring the original length, so that the longitudinal joint structure is completed.

6. The steel tube reinforced concrete support system for preventing and treating a heat power disaster in a tunnel according to claim 4, wherein The bottom of the inner layer corrugated steel plate is provided with a flange connection structure, the flange connection structure comprises a pair of flanges, a gasket and connecting bolts; the pair of flanges are arranged on two longitudinally adjacent inner layer corrugated steel plates respectively, and a pre-tightening force is applied to the pair of flanges through the connecting bolts, so that the gasket between the sealing surfaces of the flanges is compressed and becomes solid, and the uneven gap between the sealing surfaces of the two flanges is filled, so that the longitudinal connection of the adjacent steel pipe concrete support structures is more stable.

7. The steel tube reinforced concrete support system for preventing and treating a heat power disaster in a tunnel according to claim 1, wherein A plurality of screw holes are uniformly arranged on the steel pipe concrete arch support along the circumferential direction, and screw holes are also arranged at the corresponding positions of the inner and outer two layers of corrugated steel plates and the middle flame-retardant fiber layer of the arch-shaped flame-retardant fiber plate, the steel pipe concrete arch support and the arch-shaped flame-retardant fiber plate are connected by long bolts to form a stable support system.

8. The steel tube reinforced concrete support system for preventing and treating a heat- power disaster in a tunnel according to claim 1, wherein The flame-retardant fiber layer material is aramid.

9. A construction method of a steel pipe concrete support system for preventing and treating a heat and power disaster in a tunnel, characterized by, It comprises: Step 1: setting a bottom support at the bottom of the left and right ends of the deep roadway; Step 2: Support along the inner wall of the deep roadway using the steel pipe concrete arch support, so that the arch support is completely attached to the rock wall; insert the pins at both ends of the steel pipe concrete arch support into the hole slot of the bottom support, so that the steel pipe concrete arch support is connected with the bottom support; Step 3: Assemble the inner and outer two layers of corrugated steel plates and the fire-resistant fiber layer to form a sandwiched arc-shaped fire-resistant fiber plate; Step 4: Joint multiple arc-shaped fire-resistant fiber plates into an arch-shaped fire-resistant fiber plate through the annular joint structure, fix the bottom surface of both ends of the arch-shaped fire-resistant fiber plate to the bottom support, and embed the steel pipe concrete arch support in the trough of the outer corrugated steel plate of the arch-shaped fire-resistant fiber plate; Step 5: Connect the steel pipe concrete arch support with the arch-shaped fire-resistant fiber plate by means of long bolts to assemble a steel pipe concrete support structure; Step 6: Repeat steps 2 to 5 to assemble multiple steel pipe concrete support structures, joint adjacent steel pipe concrete support structures through the longitudinal joint structure, and reinforce and connect through the flange connection structure arranged at the bottom of the inner corrugated steel plate, so as to form a stable support system.

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