Tunnel blasting protection blast curtain trolley and using method thereof

Abstract

The invention relates to the technical field of tunnel blasting, and particularly discloses a tunnel blasting protection blast curtain trolley and a using method thereof.The tunnel blasting protection blast curtain trolley comprises a trolley body, the trolley body comprises a frame body with a horseshoe-shaped section, and an arc-shaped rail is arranged on the frame body along the horseshoe-shaped arc surface; the left side and the right side of the arc-shaped track are each provided with a set of circular track trolleys, and each set of circular track trolleys comprises a plurality of circular track trolleys. The cannon curtain is divided into a left surface and a right surface; the left face and the right face of the cannon curtain are combined to be the same as the cross section area of the frame body and used for covering the cross section of the frame body. The arc-shaped edges of the left face are connected through the left circular track trolley, and the arc-shaped edges of the right face are connected through the right circular track trolley. The right side of the blast curtain and the group of circular track trolleys on the right side cover the right half part of the internal space of the frame main body, and the left side of the blast curtain and the right side of the blast curtain are matched to cover the whole internal space of the frame main body to form a protection surface for blasting protection. The crawler loader can directly pass through the middle, and the frame body does not need to be disassembled in the crawler process.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel blasting, and in particular to a tunnel blasting protective curtain trolley and a use method thereof. Background Art

[0002] The tunnel blasting multi-layer protective curtain trolley is a special equipment used in the tunnel blasting construction process. During tunnel blasting construction, effective protection against flying rocks and shock waves is the core link to ensure construction safety.

[0003] The existing protection against tunnel blasting is a single-layer fixed gun curtain structure. The single-layer gun curtain structure has insufficient absorption capacity for the energy generated by the blasting, making it difficult to block multiple shock waves and high-speed flying rocks, which can easily lead to secondary accidents. At the same time, the traditional fixed gun curtain structure adopts a rigid frame and a fixed design. It is usually installed at the entrance of the tunnel. As the tunnel face advances deeper, the effectiveness of the gun curtain decreases. Secondly, after the blasting is completed, the tunnel face needs to be deslagging. After the deslagging is completed, blasting needs to be carried out again. Because the gun curtain structure needs to be used again, the gun curtain structure will not be removed. Therefore, during the deslagging process, the gun curtain structure will affect the entry and exit of the slag scraper. Summary of the Invention

[0004] The object of the present invention is to provide a tunnel blasting protection curtain trolley and a method of using the same, so as to solve the problems existing in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A tunnel blasting protection gun curtain trolley includes a trolley body, the trolley body includes a frame body with a horseshoe-shaped cross-section, and an arc track is provided on the horseshoe-shaped arc surface of the frame body; a group of ring rail trolleys are provided on the left and right sides of the arc track, and each group of ring rail trolleys includes multiple ring rail trolleys; the gun curtain is divided into a left side and a right side; the left and right sides of the gun curtain have the same cross-sectional area as the frame body after combination, and are used to cover the cross-sectional area of the frame body; the arc side of the left side of the gun curtain is connected by a group of ring rail trolleys on the left, and the arc side of the right side of the gun curtain is connected by a group of ring rail trolleys on the right; the bottom ring rail trolleys in the two groups of ring rail trolleys are in a fixed state, and when the first ring rail trolleys of the two groups of ring rail trolleys are both located at the top of the arc track, the gun curtain forms blasting protection.

[0006] Furthermore, the gun curtain has three layers, including a bulletproof fiber layer gun curtain, a buffer layer gun curtain and a fireproof layer gun curtain.

[0007] Preferably, the bulletproof fiber layer gun curtain is made of aramid fiber; the linear density of the bulletproof fiber layer gun curtain is ≥2000D, the tensile strength is ≥3000MPa, and the surface is coated with polytetrafluoroethylene (PTFE) coating.

[0008] Preferably, the buffer layer gun curtain is made of microporous foamed polyurethane (PU) with a thickness of 10-20 mm and a Shore hardness of 85A.

[0009] Preferably, the fireproof layer gun curtain is made of basalt fiber woven cloth and the surface is coated with a composite silicone rubber coating.

[0010] Furthermore, buckles are installed at the inner corner ends of the bottom left and right sides of the gun curtain, and corresponding hooks are installed on the frame body. The buckles are hung on the hooks to drive the left and right sides of the gun curtain to open, forming a passable space.

[0011] Furthermore, the circular rail trolley is provided with a power device so that each circular rail trolley can move independently along the curved track; and also includes a controller for controlling the moving direction and distance of the circular rail trolley.

[0012] Furthermore, a driving device is installed at the bottom of the frame body, and the driving device includes a roller.

[0013] Furthermore, the areas of the left and right sides are the same, and the gun curtain is equally divided from the middle to form the left and right sides.

[0014] A method for using a tunnel blasting protection curtain trolley comprises the following steps: S1: Move the frame body to a position in the tunnel at a certain distance from the blasting position and fix the frame body; S2: Start the power equipment of the circular rail trolleys. The bottom circular rail trolleys of the two sets of circular rail trolleys are in a fixed state. The first circular rail trolleys of the two sets of circular rail trolleys are both located at the top of the curved track. The remaining circular rail trolleys are evenly spaced on the curved track, so that the gun curtain is deployed and covers the internal space of the ring frame. S3: perform tunnel face blasting; S4: After blasting, hang the buckles on the left and right sides of the blast curtain on the hooks to open the left and right sides of the blast curtain, forming a passable space to facilitate the entry and exit of the slag removal equipment; if the slag removal equipment is too large, the circular rail trolley can be started and all run to the bottom to open a larger pass space; S5: After the slag removal process is completed, the blasting point will move forward, and the mobile frame body will move forward along with the blasting point and fix the frame body to put the gun curtain in a protective state.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. When a group of circular rail trolleys on the left are moving on the curved track, a group of circular rail trolleys are evenly spaced on the left half of the curved track, and the first circular rail trolley is at the top of the curved track, the left side of the gun curtain is unfolded to cover the left half of the internal space of the frame body; similarly, the right side of the gun curtain and a group of circular rail trolleys on the right cover the right half of the internal space of the frame body, and the left side of the gun curtain and the right side of the gun curtain cooperate to cover the entire internal space of the frame body, forming a protective surface for blasting protection.

[0016] 2. The bulletproof fiber curtain is made of aramid fiber; its linear density is ≥2000D and its tensile strength is ≥3000MPa. It is coated with polytetrafluoroethylene (PTFE). The PTFE coating increases protection and is corrosion-resistant, making it suitable for long-term use in tunnel environments.

[0017] 3. The buffer layer is made of microporous polyurethane (PU) foam, 10-20mm thick and with a Shore hardness of 85A. As the second layer of the blast curtain, the buffer layer primarily provides auxiliary support against large impacts from flying rocks. Polyurethane offers superior resilience and mechanical properties, minimizes compression deformation, and provides a more stable structure. It also offers excellent thermal, sound, seismic, and anti-toxic properties, effectively reducing noise generated by blasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention.

[0019] Figure 2 This is a structural diagram of the gun curtain after disassembly of the present invention.

[0020] Figure 3 It is a three-dimensional diagram of the present invention.

[0021] Figure 4 This is the structural diagram of the ring rail trolley.

[0022] The meanings of the numbers in the figure are: 1- trolley body, 101- frame body, 102- longitudinal steel beam, 201- curved track, 202- ring track trolley, 301- gun curtain, 3011- bulletproof fiber layer gun curtain, 3012- buffer layer gun curtain, 3013- fireproof layer gun curtain, 302- buckle, 303- hook. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0024] like Figures 1-4As shown, a tunnel blasting protection curtain trolley includes a trolley body 1, the trolley body 1 includes a frame body 101 with a horseshoe-shaped cross-section, and an arc track 201 is provided along the arc surface of the horseshoe-shaped frame body 101; a group of ring track trolleys 202 are respectively provided on the left and right sides of the arc track 201, and each group of ring track trolleys 202 includes multiple ring track trolleys 202; the curtain 301 is divided into a left curtain 301 and a right curtain 301; the left and right curtains 301 are combined with the The frame body 101 has a uniform cross-sectional area and is used to cover the cross-section of the frame body 101. The left curved edge of the gun curtain 301 is connected by a left set of circular rail trolleys 202, and the right curved edge of the gun curtain 301 is connected by a right set of circular rail trolleys 202. The bottommost circular rail trolley 202 of both sets of circular rail trolleys 202 is in a fixed state. When the first circular rail trolley 202 of both sets of circular rail trolleys 202 is at the top of the curved track 201, the gun curtain 301 forms blast protection. The circular track 201 is reinforced by longitudinal steel beams 102.

[0025] During the tunnel blasting stage, flying rocks and shock waves will be generated during the tunnel blasting construction. For the flying rocks and shock waves, the gun curtain 301 structure needs to be used for protection. Since the gun curtain 301 structure is set in the tunnel, it is necessary to remove the slag after the blasting is completed. The gun curtain 301 structure needs to be removed during the slag removal process. After the gun curtain 301 structure is removed, the slag scraper can smoothly enter and exit the tunnel. After the slag removal work is completed, it is necessary to blast again at a position further inward of the tunnel. During the blasting, the gun curtain 301 structure needs to be installed for protection. The reciprocating installation of the gun curtain 301 structure reduces the efficiency of the blasting construction.

[0026] The present invention is applied to the tunnel blasting stage to improve the overall efficiency of blasting and slag removal. The frame body 101 is in accordance with the shape and size of the tunnel section and is used to be erected in the tunnel; an arc track 201 is provided on the frame body 101, and two groups of circular rail trolleys 202 are provided on the arc track 201, and the movement trajectories of the two groups of circular rail trolleys 202 respectively cover the left half and the right half of the circular track 201; and the gun curtain 301 is also divided into the left side of the gun curtain 301 and the right side of the gun curtain 301. The left side of the gun curtain 301 is pulled by the left group of circular rail trolleys 202. The left group of circular rail trolleys 202 are fixed at equal intervals on the left arc side of the gun curtain 301. When the left group of circular rail trolleys 202 are all folded up at the bottom left side of the frame body 101, the left side of the gun curtain 301 is also folded up. When the left group of circular rail trolleys 202 are on the arc track, the gun curtain 301 is also folded up. 201, a group of circular rail trolleys 202 are evenly spaced on the left half of the curved track 201, and when the first circular rail trolley 202 is at the top of the curved track 201, the left side of the gun curtain 301 is unfolded to cover the left half of the internal space of the frame body 101; similarly, the right side of the gun curtain 301 and the group of circular rail trolleys 202 on the right side cover the right half of the internal space of the frame body 101, and the left side of the gun curtain 301 and the right side of the gun curtain 301 cooperate to cover the entire internal space of the frame body 101, forming a protective surface for blasting protection; and the left side of the gun curtain 301 and the right side of the gun curtain 301 can be opened from the middle, and the slag scraper can pass directly from the middle, without the need to disassemble the frame body 101 and the gun curtain 301 during the slag scraping process, thereby improving work efficiency. Figure 2 As shown, because the circular rail trolley 202 pulls the gun curtain 301, the gun curtain 301 is divided into two areas. The first area is pulled and restricted by the circular rail trolley 202, so the gun curtain 301 will be tightened; and the second area has better protection due to the weight of the gun curtain 301, and the scraper can pass through the second area.

[0027] Furthermore, the gun curtain 301 comprises three layers: a bulletproof fiber layer gun curtain 3011, a buffer layer gun curtain 3012, and a fireproof layer gun curtain 3013. These three layers of gun curtain 301 provide varying effects. The bulletproof fiber layer gun curtain 3011 is the strongest and provides initial protection against flying rocks and shock waves. The buffer layer gun curtain 3012, located behind the bulletproof fiber layer gun curtain 3011, provides additional protection against flying rocks and shock waves, primarily targeting high-impact flying rocks. The fireproof layer gun curtain 3013 provides fire protection.

[0028] Preferably, the bulletproof fiber layer gun curtain 3011 is made of aramid fiber; its linear density is ≥2000D, its tensile strength is ≥3000 MPa, and its surface is coated with polytetrafluoroethylene (PTFE). The PTFE coating increases protective strength and is corrosion-resistant, facilitating long-term use in tunnel environments.

[0029] Preferably, the buffer layer blast curtain 3012 is made of microporous polyurethane (PU) foam, with a thickness of 10-20 mm and a Shore hardness of 85A. This buffer layer, serving as the second layer of blast curtain 301, primarily provides auxiliary support against large impacts from flying rocks. Polyurethane offers superior resilience and mechanical properties, minimizes compression deformation, and provides a more stable structure. It also offers excellent thermal, sound, shock, and anti-toxic properties, effectively reducing noise generated by blasting.

[0030] Preferably, the fireproof layer gun curtain 3013 is made of basalt fiber woven cloth and coated with a composite silicone rubber coating. Silicone rubber also has excellent heat resistance and can work for a long time at 180°C. It can also withstand temperatures slightly above 200°C for several weeks or longer and still remain elastic. It can also withstand instantaneous high temperatures above 300°C, making it a good fireproofing effect.

[0031] Furthermore, the left and right sides of the gun curtain 301 are both equipped with buckles 302 at the bottom inner corners, and corresponding hooks 303 are installed on the frame body 101. The buckles 302 are hung on the hooks 303, thereby driving the left and right sides of the gun curtain 301 to open, forming a space that can pass through. The buckles 302 and hooks 303 are set, and the hooks 303 are installed at the middle height position of the frame body 101. The hooks 303 are installed on the front and rear sides of the frame body 101, and are used to hang the corner ends of the multi-layer gun curtain 301 on the hooks 303 respectively, leaving a passage in the middle of the frame body 101 to facilitate the passage of the scraper.

[0032] Furthermore, the circular rail trolley 202 is provided with a power device so that each circular rail trolley 202 can move independently along the curved track 201; and also includes a controller for controlling the moving direction and distance of the circular rail trolley 202.

[0033] Furthermore, a driving device is installed at the bottom of the frame body 101, and the driving device includes a roller.

[0034] Furthermore, the areas of the left side and the right side are the same, and the gun curtain 301 is equally divided from the middle to form the left side and the right side.

[0035] A method for using a tunnel blasting protection curtain trolley comprises the following steps: S1: Move the frame body 101 to a position in the tunnel at a certain distance from the blasting position, and fix the frame body 101; S2: The power equipment of the circular rail trolleys 202 is started. The bottommost circular rail trolleys 202 of the two sets of circular rail trolleys 202 are both in a fixed state. The first circular rail trolleys 202 of the two sets of circular rail trolleys 202 are both located at the top of the curved track 201. The remaining circular rail trolleys 202 are evenly spaced on the curved track 201, so that the gun curtain 301 is deployed and covers the inner space of the annular frame; S3: perform tunnel face blasting; S4: After blasting is completed, the buckles 302 on the left and right sides of the gun curtain 301 are hung on the hooks 303, so that the left and right sides of the gun curtain 301 are opened, forming a passable space to facilitate the entry and exit of the slag removal equipment; if the slag removal equipment is too large, the circular rail trolley 202 can be started and all run to the bottom to open a larger pass space; S5: After the slag removal process is completed, the blasting point will move forward, and the mobile frame body 101 will move forward following the blasting point and the fixed frame body 101 will be placed in a protective state.

[0036] The frame body 101 is moved to a specific position to provide protection during blasting. When slag removal is required, the left and right sides of the blast curtain 301 can be opened from the middle, and a slag scraper can pass directly through the middle. There is no need to disassemble the frame body 101 and the blast curtain 301 during the slag removal process, thereby improving work efficiency. When blasting is required again, the frame body 101 can be moved and used directly without disassembly, which is highly efficient.

[0037] The terms "connection" and "fixation" appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0038] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tunnel blasting protection curtain trolley, characterized by: The trolley body (1) includes a frame body (101) having a horseshoe-shaped cross-section, and an arc-shaped track (201) is provided along the arc surface of the horseshoe-shaped frame body (101); a group of circular track trolleys (202) are respectively provided on the left and right sides of the circular track (201), and each group of circular track trolleys (202) includes a plurality of circular track trolleys (202); The gun curtain (301) is divided into a left side and a right side; the left side and the right side of the gun curtain (301) are combined to have the same cross-sectional area as the frame body (101), and are used to cover the cross-sectional area of the frame body (101); The left curved side of the gun curtain (301) is connected by a group of ring-rail trolleys (202) on the left side, and the right curved side of the gun curtain (301) is connected by a group of ring-rail trolleys (202) on the right side; the bottom ring-rail trolleys (202) in the two groups of ring-rail trolleys (202) are both in a fixed state, and when the first ring-rail trolleys (202) of the two groups of ring-rail trolleys (202) are both located at the top of the curved track (201), the gun curtain (301) forms blasting protection.

2. The tunnel blasting protection curtain trolley according to claim 1, characterized in that: The gun curtain (301) has three layers, including a bulletproof fiber layer gun curtain (3011), a buffer layer gun curtain (3012) and a fireproof layer gun curtain (3013).

3. The tunnel blasting protection curtain trolley according to claim 2, characterized in that: The bulletproof fiber layer gun curtain (3011) is made of aramid fiber; the linear density of the bulletproof fiber layer gun curtain (3011) is ≥2000D, the tensile strength is ≥3000MPa, and the surface is coated with a polytetrafluoroethylene (PTFE) coating.

4. The tunnel blasting protection curtain trolley according to claim 2, characterized in that: The buffer layer gun curtain (3012) is made of microporous foamed polyurethane (PU) with a thickness of 10-20 mm and a Shore hardness of 85A.

5. The tunnel blasting protection curtain trolley and its use method according to claim 2, characterized in that: The fireproof layer gun curtain (3013) is made of basalt fiber woven cloth and coated with a composite silicone rubber coating on the surface.

6. The tunnel blasting protection curtain trolley according to claim 1, characterized in that: The left side of the gun curtain (301) and the right side of the gun curtain (301) are both provided with buckles (302) at the inner corner ends of the bottom, and corresponding hooks (303) are provided on the frame body (101). The buckles (302) are hung on the hooks (303) to drive the left side of the gun curtain (301) and the right side of the gun curtain (301) to open, forming a passable space.

7. The tunnel blasting protection curtain trolley according to claim 1, characterized in that: The circular rail trolley (202) is provided with a power device so that each circular rail trolley (202) can move independently along the curved track (201); It also includes a controller for controlling the traveling direction and traveling distance of the circular rail trolley (202).

8. The tunnel blasting protection curtain trolley according to claim 1, characterized in that: A driving device is installed at the bottom of the frame body (101), and the driving device includes a roller.

9. The tunnel blasting protection curtain trolley according to claim 1, characterized in that: The areas of the left and right sides are the same, and the gun curtain (301) is equally divided from the middle to form the left and right sides.

10. A method for using a tunnel blasting protection curtain trolley according to claims 1-9, characterized in that: The following steps are involved: S1: moving the frame body (101) to a position in the tunnel at a certain distance from the blasting position, and fixing the frame body (101); S2: starting the power equipment of the circular rail trolley (202), the bottom circular rail trolley (202) of the two sets of circular rail trolleys (202) are both in a fixed state, the first circular rail trolley (202) of the two sets of circular rail trolleys (202) are both located at the top of the curved track (201), and the remaining circular rail trolleys (202) are evenly spaced on the curved track (201), so that the gun curtain (301) is unfolded and covers the inner space of the annular frame; S3: perform tunnel face blasting; S4: After the blasting is completed, the buckles (302) on the left side of the gun curtain (301) and the right side of the gun curtain (301) are hung on the hook (303), so that the left side of the gun curtain (301) and the right side of the gun curtain (301) are opened to form a passable space, which is convenient for the entry and exit of the slag removal equipment; when the slag removal equipment is too large, the circular rail trolley (202) can be started to run all to the bottom to open a larger pass space; S5: After the slag removal process is completed, the blasting point will move forward, and the mobile frame body (101) will move forward following the blasting point and fix the frame body (101), so that the gun curtain (301) is in a protective state.

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