A trestle for rock drilling

Abstract

This utility model discloses a trestle bridge for rock drilling, including a longitudinally movable main bridge and a movable base, and a laterally swingable rock drilling mechanism. The main bridge has a passageway for vehicles and a longitudinal track for the movable base to move. The longitudinal track is located below or to the side of the passageway. The rock drilling mechanism is connected to the movable base. The excavation method is as follows: S1, the main bridge moves into position; S2, the front approach bridge moves forward and overlaps the step to be excavated, the protective cover moves to a clearance position, the movable base drives the rock drilling mechanism forward, and the rock drilling mechanism performs blasting on the invert end face to be excavated; S3, the rock drilling mechanism and the front approach bridge retreat to a safe area, and the protective cover moves to the front of the rock drilling mechanism; S4, explosives are loaded and blasted in each blast hole of the invert, and the debris is cleared; S5, steps S2 to S4 are repeated until the excavation of the entire construction section of the invert is completed. This utility model has advantages such as reliable structure, ability to accommodate both rock drilling and vehicle passage for debris removal, and improved construction progress.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering machinery technology, and in particular to a trestle bridge that can be used for rock drilling. Background Technology

[0002] During tunnel construction using the bench method, the invert needs to be constructed promptly to ensure structural stability and the formation of a closed pressure ring. Before constructing the invert, excavation of the soil and rock at the invert location is necessary. Currently, this excavation commonly employs the drill-and-blast method, which involves drilling a specific arrangement of blast holes on the invert working face, followed by a series of procedures including charging, blasting, and debris removal. Similarly, when the design requires the laying of deep-buried water trenches within the tunnel, the excavation of these trenches also faces similar drill-and-blast requirements. Currently, the main methods for drilling blast holes for tunnel inverts and deep-buried water trenches are as follows: 1. Manual Handheld Drilling: This is the most traditional and common method. Workers stand on uncleaned or partially cleared rock piles and operate heavy handheld pneumatic or hydraulic rock drills. This method presents serious safety hazards: the working environment is harsh, the site is uneven, and the rock debris is slippery, easily causing personnel to slip, fall, or suffer mechanical injuries. Simultaneously, the dust and noise generated during drilling pose significant health risks to operators. Furthermore, this method is inefficient, requires a large workforce, is labor-intensive, and makes it difficult to guarantee drilling accuracy (mainly including hole depth and direction), affecting subsequent blasting effects and excavation profile quality. It has become one of the key bottlenecks restricting the efficiency of tunnel excavation cycle operations.

[0003] 2. Utilization of large rock drilling rigs: While fully hydraulic rock drilling rigs are highly efficient and safe for drilling at the tunnel face, their large size and complex structure present significant operational blind spots and flexibility limitations when used for drilling invert sections, as the rock and soil at the bottom of the tunnel cross-section are located in the invert area. The rig's boom cannot effectively cover areas near the initial support section or tunnel corners, and a large amount of backfilled and compacted soil is typically required to provide a stable support platform for the rig, a time-consuming and labor-intensive process. After drilling, the backfilled soil must be excavated again, resulting in repetitive work and resource waste. Furthermore, when using rock drilling rigs for invert drilling or deep-buried trench drilling, the front face cannot be cleared for muck removal, severely slowing down the construction progress.

[0004] 3. Temporary scaffolding platform operation: Some construction companies choose to erect steel pipe scaffolding platforms to provide working surfaces for personnel and drilling rigs. However, erecting and dismantling scaffolding itself requires a significant investment of manpower and time, resulting in low efficiency. Furthermore, the stability and safety of temporary scaffolding platforms cannot be guaranteed, and they are prone to instability when subjected to the strong impacts and vibrations of drilling rigs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a trestle with a reliable structure that can accommodate both rock drilling and vehicle passage for muck removal, thereby improving the construction progress.

[0006] This utility model further provides an excavation method using the aforementioned trestle bridge.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A rock drilling trestle includes a longitudinally movable main bridge, a laterally swingable rock drilling mechanism, and a longitudinally movable base. The main bridge has a passageway for vehicles and a longitudinal track for the movable base to move. The longitudinal track is located below or to the side of the passageway. The rock drilling mechanism is connected to the movable base.

[0008] As a further improvement to the above technical solution: The main bridge includes two longitudinally arranged main beams and a crossbeam located between the two main beams. The passageway is located on the upper part of the crossbeam, and the longitudinal transfer track is located on the lower inner side of the main beam. The height of the longitudinal transfer track is less than the height of the crossbeam.

[0009] The main bridge includes two longitudinally arranged main beams, the passage is located on the upper part of the main beams, and the longitudinal transfer track is located on the lower inner side of the main beams.

[0010] The movable seat is provided with rollers and traction parts on both sides of the transverse direction. The lower ends of the main beam are respectively provided with driving sprockets and driven sprockets. Traction chains are wound around the driving sprockets and driven sprockets. The lower part of the crossbeam is provided with a rotary drive component. The two driving sprockets are connected by a transmission shaft. The rotary drive component is connected to the transmission shaft. The traction part is connected to the traction chain.

[0011] The movable seat is provided with telescopic drive components on both sides in the lateral direction. The telescopic drive components are connected to the locking components through ball heads to drive the locking components to abut or separate from the main beam.

[0012] The main bridge is equipped with a longitudinally movable approach bridge at its front end.

[0013] The front end of the main bridge is equipped with a protective cover that can reciprocate.

[0014] An excavation method, implemented using the aforementioned rock-drilling trestle, includes the following steps: S1, Main bridge travel in place; S2. The front approach bridge moves forward and overlaps on the step to be excavated. The protective cover moves to the avoidance position. The moving seat drives the rock drilling mechanism to move forward. The rock drilling mechanism performs blasting on the end face of the inverted arch to be excavated. S3. After completing all the rock drilling at the end face, the rock drilling mechanism and the front approach bridge move back to the safe area, and the protective cover moves to the front of the rock drilling mechanism for protection. S4. Charge explosives into each blast hole of the invert arch and blast, then remove debris. S5. Repeat steps S2 to S4 until the excavation of the entire construction section of the invert arch is completed.

[0015] As a further improvement to the above technical solution: It also includes the following steps: S6. The rock drilling mechanism moves to the deep buried ditch excavation area and performs rock drilling at the bottom of the deep buried ditch. S7. The rock drilling mechanism adjusts its posture to drill blast holes in the side wall of the deep-buried ditch. S8. The rock drilling mechanism and the front approach bridge move back to a safe area, and the protective cover moves to the front of the rock drilling mechanism for protection. S9. Load explosives into each blast hole in the deep-buried ditch and blast, then remove the slag. S10. Repeat steps S6 to S9 until the excavation of the entire construction section of the deep-buried ditch is completed. S11. Install culverts in the areas where deep-buried ditches have been excavated.

[0016] An excavation method, implemented using the aforementioned rock-drilling trestle, includes the following steps: S1, Main bridge travel in place; S2. The front approach bridge moves forward and overlaps on the step to be excavated. The protective cover moves to the avoidance position. The moving seat drives the rock drilling mechanism to move forward. The rock drilling mechanism performs blasting on the end face of the inverted arch to be excavated. S3. After completing all the rock drilling at the end face, the rock drilling mechanism and the front approach bridge move back to the safe area, and the protective cover moves to the front of the rock drilling mechanism for protection. S4. Charge explosives into each blast hole of the invert arch and blast, then remove debris. S5. The rock drilling mechanism moves to the deep buried ditch excavation area and performs rock drilling at the bottom of the deep buried ditch. S6. The rock drilling mechanism adjusts its posture to drill blast holes in the side wall of the deep-buried ditch. S7. The rock drilling mechanism and the front approach bridge move back to a safe area, and the protective cover moves to the front of the rock drilling mechanism for protection. S8. Load explosives into each blast hole in the deep-buried ditch and blast, then remove the slag. S9. Repeat steps S2 to S8 until the excavation of the entire construction section of the inverted arch and the deep-buried ditch is completed. S10. Install culverts in the areas where deep-buried ditches have been excavated.

[0017] Compared with the prior art, the advantages of this utility model are: This utility model discloses a rock drilling trestle that integrates the rock drilling mechanism onto the main bridge via a movable base. The longitudinal track of the movable base is located below or to the side of the passageway. When the rock drilling mechanism is drilling blast holes in the excavation area of ​​the invert arch or deep-buried ditch, muck removal vehicles or other construction equipment can pass normally through the passageway of the main bridge without interference, which improves construction efficiency. Furthermore, the rock drilling mechanism can cover all blast holes on the excavation area of ​​the invert arch by lateral swinging, reducing blind spots. The main bridge provides a stable, safe, and efficient mobile working platform for the rock drilling mechanism, and can be quickly deployed and moved to adapt to the limited space and frequent process changes within the tunnel, thereby effectively shortening the time of a single work cycle, ensuring the safety of construction personnel, and also helping to improve the quality of drilling and blasting.

[0018] The excavation method disclosed in this utility model can first complete the excavation of the entire construction section of the invert arch, then gradually complete the excavation of the entire construction section of the deep-buried ditch, and finally install the culvert. Alternatively, the excavation of the entire construction section of the invert arch and the entire construction section of the deep-buried ditch can be completed alternately, and the culvert can be installed at the end. This method offers high flexibility. Furthermore, when blasting with explosives inside the blast hole, the front approach bridge and the rock drilling mechanism retreat to a safe area, while the protective cover moves to the front of the rock drilling mechanism to provide protection. This method offers good safety and reliability and helps prevent damage caused by debris generated during the blasting process.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the rock drilling trestle of this utility model. Figure 2 This is a three-dimensional structural diagram of the rock drilling mechanism and the moving base in this utility model.

[0021] Figure 3 This is a schematic diagram of the blast hole excavation for the inverted arch involved in this utility model.

[0022] Figure 4 This is a schematic diagram of the blast hole for excavating a deep-buried ditch, which relates to this utility model. (a) is a sectional view and (b) is a top view.

[0023] Figure 5 This is a schematic diagram of the main structure of the initial inverted arch rock drilling state of this utility model.

[0024] Figure 6 This is a top view of the initial inverted arch rock-drilling state of this utility model, where (a) is rock-drilling in the middle of the inverted arch and (b) is rock-drilling on the side of the inverted arch after lateral swing.

[0025] Figure 7 yes Figure 5 AA view.

[0026] Figure 8 yes Figure 5 BB view.

[0027] Figure 9 This is a schematic diagram of the main structure of the present invention in the state of excavation of a 4-meter inverted arch.

[0028] Figure 10 This is a schematic diagram of the main structure of the present invention in the state of excavation of an 8-meter inverted arch.

[0029] Figure 11 This is a schematic diagram of the main structure of the present invention in the state of excavation of a 12-meter inverted arch.

[0030] Figure 12 This is a schematic diagram of the main structure of the initial deep-buried ditch bottom rock drilling state of this utility model.

[0031] Figure 13 This is a top view schematic diagram of the rock-drilling state of the side wall of the initially buried water ditch of this utility model.

[0032] Figure 14 This is a schematic diagram of the main structure of the rock-drilling state of the side wall of the initially buried water ditch of this utility model.

[0033] Figure 15 yes Figure 14 The CC view.

[0034] Figure 16 This is a schematic diagram of the main structure of the present invention in the rock drilling state of a 4- to 8-meter deep buried ditch bottom.

[0035] Figure 17 This is a schematic diagram of the main structure of the rock-drilling state of the side wall of the 4-meter to 8-meter deep buried water ditch of this utility model.

[0036] Figure 18 This is a schematic diagram of the main structure of the rock drilling state at the bottom of the 8-meter to 12-meter deep buried water ditch of this utility model.

[0037] Figure 19 This is a schematic diagram of the main view of the rock-drilling state of the side wall of the 8-meter to 12-meter deep buried water ditch of this utility model.

[0038] Figure 20 This is a schematic diagram of the main structure of the installation center culvert of this utility model.

[0039] Figure 21 This is a side view structural diagram of another embodiment of the present invention.

[0040] The labels in the diagram represent: 1. Main bridge; 11. Passage section; 12. Longitudinal track; 13. Main beam; 131. Drive sprocket; 132. Driven sprocket; 133. Traction chain; 134. Drive shaft; 14. Crossbeam; 141. Rotary drive component; 15. Longitudinal trolley; 16. Traveling mechanism; 2. Rock drilling mechanism; 3. Moving seat; 31. Roller; 32. Traction section; 33. Telescopic drive component; 331. Ball joint; 332. Locking component; 4. Front approach bridge; 5. Protective cover; 6. Culvert; 7. Rear approach bridge. Detailed Implementation

[0041] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Figures 1 to 2This invention illustrates one embodiment of a rock-drilling trestle, which includes a longitudinally movable main bridge 1, a laterally swingable rock-drilling mechanism 2, and a longitudinally movable movable seat 3. The main bridge 1 is provided with a passageway 11 for vehicles and a longitudinal track 12 for the movable seat 3 to move. The longitudinal track 12 is located below the passageway 11 (in other embodiments, the longitudinal track 12 can also be located on the side of the passageway 11 without obstructing vehicles or other construction equipment from passing through the passageway 11; however, the disadvantage is that the space under the main bridge 1 is not fully utilized, which increases the overall width of the trestle). The rock-drilling mechanism 2 is connected to the movable seat 3. In this context, longitudinal refers to the length direction of the tunnel or the front-to-back direction, with the tunnel excavation end being the front. Correspondingly, transverse refers to the width direction of the tunnel. Preferably, the rock drilling mechanism 2 can be hinged to the moving seat 3, and the rock drilling mechanism 2 can be driven to swing laterally by hydraulic cylinders, etc. The main bridge 1 is equipped with a longitudinal trolley 15, and the rear end is equipped with a walking mechanism 16 and a rear approach bridge 7. The front end of the main bridge 1 and the longitudinal trolley 15 are both equipped with telescopic outriggers, so that the step-by-step movement of the trestle can be realized. For the specific principle of the step-by-step movement of the trestle, please refer to the various step-by-step trestle applications previously filed by the applicant, which will not be elaborated here.

[0046] In this embodiment, a rock-drilling trestle integrates the rock-drilling mechanism 2 onto the main bridge 1 of the trestle via a movable base 3. The longitudinal track 12 of the movable base 3 is located below the passageway 11. The rock-drilling mechanism 2 performs blast hole drilling on the end face of the invert arch to be excavated or in the area of ​​the deep-buried ditch (the specific location of the blast hole drilling is referred to...). Figure 3 and Figure 4 When (as shown), slag removal vehicles or other construction equipment (such as concrete mixer trucks) can pass normally through the passageway 11 of the main bridge 1 without interference, which is beneficial to improving construction efficiency. Furthermore, the rock drilling mechanism 2 can cover each blast hole on the end face of the invert arch to be excavated (specifically as shown) through lateral swing. Figure 6 (As shown), reducing blind spots in operation. The main bridge 1 provides a stable, safe, and efficient mobile working platform for the rock drilling mechanism 2, and can be quickly deployed and transferred to adapt to the limited space and frequent process changes within the tunnel, thereby effectively shortening the time of a single work cycle, ensuring the safety of construction personnel, and also helping to improve the quality of drilling and blasting.

[0047] See details Figure 7 and Figure 8In this embodiment, the main bridge 1 includes two longitudinally arranged main beams 13 and a crossbeam 14 located between the two main beams 13. The structure is simple, reliable, and has a strong load-bearing capacity, making it suitable for tunnels with a large width. A passageway 11 is located on the upper part of the crossbeam 14, and a longitudinal transfer track 12 is located on the lower inner side of the main beams 13. The height of the longitudinal transfer track 12 is less than the height of the crossbeam 14. Vehicles and other construction equipment can pass normally on the upper part of the crossbeam 14, while the movable seat 3 can move longitudinally along the longitudinal transfer track 12 below the crossbeam 14, thereby driving the rock drilling mechanism 2 to move longitudinally without interference. This also makes full use of the space under the main bridge 1, avoiding additional occupation of the limited space within the tunnel.

[0048] See details Figure 21 In other embodiments, the main bridge 1 includes two longitudinally arranged main beams 13. A passageway 11 is located on the upper part of the main beams 13, which helps reduce the lateral width of the main bridge 1 and is suitable for narrower tunnels. A longitudinal transfer track 12 is located on the lower inner side of the main beams 13. Vehicles and other construction equipment can pass normally on the upper part of the main beams 13, while the movable seat 3 can move longitudinally along the longitudinal transfer track 12 on the lower inner side of the main beams 13, thereby driving the rock drilling mechanism 2 to move longitudinally without interference. This also makes full use of the space under the main bridge 1, avoiding additional occupation of the limited space within the tunnel. See details Figure 2 and Figure 6 In this embodiment, the movable seat 3 is provided with rollers 31 and traction parts 32 on both sides of the transverse direction. The main beam 13 is provided with a drive sprocket 131 and a driven sprocket 132 at both ends of the lower part. A traction chain 133 is wound around the drive sprocket 131 and the driven sprocket 132. The lower part of the crossbeam 14 is provided with a rotary drive component 141 (e.g., a motor or hydraulic motor). The two drive sprockets 131 are connected by a transmission shaft 134. The rotary drive component 141 is connected to the transmission shaft 134 (e.g., through a sprocket chain mechanism or gear set). The traction part 32 is connected to the traction chain 133. When the rock drilling mechanism 2 needs to move longitudinally, the rotary drive component 141 drives the transmission shaft 134 to rotate. The transmission shaft 134 drives the drive sprockets 131 at both ends to rotate, which helps to keep the traction chains 133 on both sides running synchronously. The traction chains 133 drive the moving seat 3 to move longitudinally through the traction part 32, which in turn drives the rock drilling mechanism 2 to move longitudinally. The rollers 31 cooperate with the longitudinal track 12, which helps to reduce the frictional resistance when the moving seat 3 moves, making the movement process smoother.

[0049] Furthermore, in this embodiment, the movable seat 3 is provided with telescopic drive components 33 (such as cylinders, hydraulic cylinders, electric push rods, etc.) on both sides of the transverse direction. The telescopic drive components 33 are connected to the locking components 332 (such as pads or friction pads, etc.) through ball joints 331 to drive the locking components 332 to abut or separate from the main beam 13. When the rock drilling mechanism 2 needs to perform rock drilling operations, the telescopic drive components 33 extend to drive the locking components 332 to extend, so that the locking components 332 abut against the main beam 13, thereby fixing the movable seat 3 to the main beam 13. The locking components 332 and the telescopic drive components 33 are connected by ball joints 331, so that the locking components 332 can rotate a certain angle relative to the telescopic drive components 33, which is beneficial to ensure that the locking components 332 are tightly attached to the main beam 13, and the reliability is good. Conversely, when the movable seat 3 needs to move longitudinally, the telescopic drive components 33 retract to drive the locking components 332 to retract, thereby separating from the main beam 13. The structure is reasonable and effective.

[0050] See details Figure 5 and Figure 11 In this embodiment, the front end of the main bridge 1 is provided with a longitudinally movable front approach bridge 4. During the rock drilling process of the rock drilling mechanism 2, the front approach bridge 4 is attached to the step to be excavated, facilitating vehicles to pass over and over the main bridge 1. When blasting is required, the front approach bridge 4 retreats to a safe position to avoid damage during blasting, making the structure reasonable and effective. Preferably, a support wheel set can be provided at the front end of the main bridge 1 to provide support for the front approach bridge 4, thereby reducing the resistance to the longitudinal movement of the front approach bridge 4 and making it more convenient to use.

[0051] Furthermore, in this embodiment, the front end of the main bridge 1 is provided with a protective cover 5 that can reciprocate (e.g., swing, rotate, or telescopic). See details. Figure 10 and Figure 11 When the rock drilling mechanism 2 needs to perform rock drilling operations, the protective cover 5 is in a clearance position to avoid interfering with the movement of the rock drilling mechanism 2. When it is necessary to carry out explosive blasting, the rock drilling mechanism 2 retreats to a safe area, and the protective cover 5 moves to the front of the rock drilling mechanism 2 to provide protection and prevent damage to the rock drilling mechanism 2 during blasting. It has good reliability.

[0052] Figures 5 to 20 This invention illustrates an embodiment of the excavation method of the present invention. The excavation method of this embodiment utilizes the aforementioned rock-drilling trestle and includes the following steps: S1, Main Bridge 1, has been moved into position; S2, the front approach bridge 4 moves forward and overlaps on the step to be excavated, while the rear approach bridge 7 overlaps on the filling layer that has been poured. The protective cover 5 moves to the avoidance position (in this embodiment, it rotates to the horizontal state). The moving seat 3 drives the rock drilling mechanism 2 to move forward, and the rock drilling mechanism 2 performs blasting on the end face of the inverted arch to be excavated. S3. After completing all the rock drilling at the end face, the rock drilling mechanism 2 and the front approach bridge 4 retreat to the safe area, and the protective cover 5 moves to the front of the rock drilling mechanism 2 (at this time, the protective cover 5 rotates to the vertical position for protection). S4. Charge explosives into each blast hole of the invert arch and blast, then remove debris. S5. Repeat steps S2 to S4 until the excavation of the entire construction section of the invert arch is completed, as detailed below. Figures 5 to 11 As shown, the entire construction section of the invert arch is 12 meters long, so it is necessary to carry out the work in three cycles, each time drilling to a depth of 4 meters.

[0053] Furthermore, for tunnels designed with deeply buried drainage culverts 6, in this embodiment, the excavation method of this utility model further includes the following steps: S6. The rock drilling mechanism 2 moves to the deep buried ditch excavation area and performs rock drilling at the bottom of the deep buried ditch. S7. The rock drilling mechanism 2 adjusts its posture to drill blast holes in the side wall of the deep-buried ditch. S8, rock drilling mechanism 2 and front approach bridge 4 retreat to a safe area, and protective cover 5 moves to the front of rock drilling mechanism 2 for protection; S9. Load explosives into each blast hole in the deep-buried ditch and blast, then remove the slag. S10. Repeat steps S6 to S9 until the excavation of the entire construction section of the deep-buried ditch is completed. S11. Install culvert 6 in the area where the deep-buried ditch has been excavated, specifically as follows: Figures 12 to 20 As shown, the entire construction section of the deep-buried ditch is 12 meters long and requires three cycles of operation, each time drilling to a depth of 4 meters.

[0054] Of course, in other embodiments, the excavation of the invert arch and the deep-buried ditch can also be carried out alternately, that is, after the excavation of the invert arch to a depth of 4 meters is completed, the excavation of the deep-buried ditch to a depth of 4 meters is completed simultaneously. Specifically: The excavation method in this embodiment, implemented using the aforementioned rock-drilling trestle, includes the following steps: S1, Main Bridge 1, has been moved into position; S2, the front approach bridge 4 moves forward and overlaps on the step to be excavated, the protective cover 5 moves to the avoidance position, the moving seat 3 drives the rock drilling mechanism 2 to move forward, and the rock drilling mechanism 2 performs blasting on the end face of the inverted arch to be excavated. S3. After completing all the rock drilling at the end face, the rock drilling mechanism 2 and the front approach bridge 4 retreat to the safe area, and the protective cover 5 moves to the front of the rock drilling mechanism 2 for protection. S4. Charge explosives into each blast hole of the invert arch and blast, then remove debris. S5. The rock drilling mechanism 2 moves to the deep buried ditch excavation area and performs rock drilling at the bottom of the deep buried ditch 6. S6. The rock drilling mechanism 2 adjusts its posture to drill blast holes in the side wall of the deep-buried ditch. S7. The rock drilling mechanism 2 and the front approach bridge 4 retreat to a safe area, and the protective cover 5 moves to the front of the rock drilling mechanism 2 for protection. S8. Load explosives into each blast hole in the deep-buried ditch and blast, then remove the slag. S9. Repeat steps S2 to S8 until the excavation of the entire construction section of the inverted arch and the deep-buried ditch is completed. S10. Install culverts in the area where the deep-buried ditch has been excavated.

[0055] The excavation method in this embodiment can first complete the excavation of the entire construction section of the invert arch, then gradually complete the excavation of the entire construction section of the deep-buried ditch, and finally install the culvert 6. Alternatively, the excavation of the entire construction section of the invert arch and the entire construction section of the deep-buried ditch can be completed alternately, and the culvert 6 can be installed at the end. This method offers high flexibility. Furthermore, when blasting with explosives inside the blast hole, the front approach bridge 4 and the rock drilling mechanism 2 retreat to a safe area, while the protective cover 5 moves to the front of the rock drilling mechanism 2 to provide protection for it. This method offers good safety and reliability and helps prevent damage caused by debris generated during the blasting process.

[0056] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A trestle bridge for rock drilling, comprising a longitudinally movable main bridge (1), characterized in that: It also includes a rock-drilling mechanism (2) that can swing laterally and a moving seat (3) that can move longitudinally. The main bridge (1) is provided with a passage (11) for vehicles to pass through and a longitudinal track (12) for the moving seat (3) to move. The longitudinal track (12) is located below or on the side of the passage (11). The rock-drilling mechanism (2) is connected to the moving seat (3).

2. The rock drilling trestle according to claim 1, characterized in that: The main bridge (1) includes two longitudinally arranged main beams (13) and a crossbeam (14) located between the two main beams (13). The passage section (11) is located on the upper part of the crossbeam (14), and the longitudinal track (12) is located on the lower inner side of the main beam (13). The height of the longitudinal track (12) is less than the height of the crossbeam (14).

3. The rock drilling trestle according to claim 1, characterized in that: The main bridge (1) includes two longitudinally arranged main beams (13), the passage section (11) is located on the upper part of the main beams (13), and the longitudinal track (12) is located on the lower inner side of the main beams (13).

4. The rock drilling trestle according to claim 2, characterized in that: The movable seat (3) is provided with rollers (31) and traction parts (32) on both sides of the transverse direction. The main beam (13) is provided with a drive sprocket (131) and a driven sprocket (132) at both ends of the lower part. A traction chain (133) is wound around the drive sprocket (131) and the driven sprocket (132). A rotary drive (141) is provided at the lower part of the crossbeam (14). The two drive sprockets (131) are connected by a transmission shaft (134). The rotary drive (141) is connected to the transmission shaft (134). The traction part (32) is connected to the traction chain (133).

5. A rock-drilling trestle according to any one of claims 2 to 4, characterized in that: The movable seat (3) is provided with telescopic drive members (33) on both sides of the lateral direction. The telescopic drive members (33) are connected to the locking member (332) through the ball head (331) to drive the locking member (332) to abut or separate from the main beam (13).

6. A rock-drilling trestle according to any one of claims 1 to 4, characterized in that: The main bridge (1) is equipped with a longitudinally movable front approach bridge (4) at its front end.

7. A rock-drilling trestle according to any one of claims 1 to 4, characterized in that: The front end of the main bridge (1) is equipped with a reciprocating protective cover (5).

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