A bearing platform suitable for vertical drilling of flat-roofed cave roof rock mass and a method of using the same

Abstract

The present application relates to a kind of bearing platform suitable for flat ceiling rock mass vertical drilling, the bearing platform includes the groove base being placed on fixed base, the groove being placed on groove base and the lifting platform and chuck for fixing drill rig being placed on groove.The fixed base is provided with two groups of connecting pipes, and the connecting pipe is connected with the support structure being placed in the lower part of rock mass by fastener;The top of groove is provided with end cover, and the bottom is provided with guide plate and positioning plate connected together;Lifting platform includes lifting body and rocker lever being sleeved on groove;The side of lifting body is provided with magnetic metal sheet, and the corresponding side is provided with chuck;The side of lifting body perpendicular to magnetic metal sheet is provided with connecting piece with through hole, and rocker lever is arranged in through hole;The side of groove adjacent to chuck is provided with sawtooth.The present application also discloses the use method of the bearing platform.The present application is easy to install, simple to operate, and can be used for different height, different angle anchor hole forming operation in site protection.

Description

Technical Field

[0001] This invention relates to the field of reinforcement and protection of rock masses in grotto temples, and particularly to a bearing platform suitable for vertical drilling of rock masses on the roof of flat-topped grottoes and its usage method. Background Technology

[0002] Grotto temples, as a unique type of cultural relic, are rich in variety and numerous, vividly reproducing the origin and development of Buddhist art and culture in my country. They are an important artistic treasure among my country's material cultural heritage. The excavation of grottoes leads to stress redistribution and unloading tensile deformation within the grottoes. The central part of the grotto roof rock mass experiences the greatest bending moment, with well-developed horizontal fissures in the sedimentary layers, uneven interlayer thickness, and severe weathering. Under the action of interlayer tensile fissures, the grottoes are in an extremely dangerous state. The fragile roof rock mass is highly sensitive to drilling disturbances; therefore, special attention must be paid to minimizing the disturbance and damage to the rock mass during roof reinforcement projects.

[0003] There are many methods for reinforcing the cracked rock mass of grottoes, and anchor bolt anchoring is one of the most important. The quality of anchor hole formation is one of the key factors in controlling the quality of anchoring projects.

[0004] The rock mass anchoring project for cracked roof slabs in flat-topped caves differs significantly from common rock mass anchoring in terms of direction and angle. Generally, rock mass anchoring refers to drilling vertically into the rock mass, with the direction usually horizontal or slightly inclined to the ground. The height and angle of the drilling rig support are easy to set and fix, and portability is not a major concern.

[0005] For unstable rock formations in grottoes, anchor bolts are typically inserted downwards at an angle. However, anchoring flat-roofed grottoes requires drilling vertically upwards from the grotto roof surface, with the anchor bolts usually inserted vertically upwards or at a certain angle. Drilling is necessary before anchor bolt insertion, and to ensure hole quality and efficiency, a drilling rig support is generally required. For the safety of cultural relics, scaffolding must be erected below the roof for support before operation. The drilling rig support must be stably connected to the supporting structure. Different drilling positions require different drilling angles, therefore the drilling rig support also needs strong adjustability, portability, and the ability to connect to monitoring equipment during drilling. Traditional drilling rig supports have non-adjustable angles, poor compatibility with drilling machinery, poor connection to the supporting structure, poor portability, and high drilling difficulty, failing to meet the requirements for vertical drilling of roof rock formations. Therefore, enhancing hole stability, improving hole quality and efficiency, preventing drilling disturbance and damage, and enhancing monitoring capabilities during drilling have become key issues in flat-roofed grotto anchoring technology. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a bearing platform that is easy to install and simple to operate for vertical drilling of rock masses on the top slab of flat-topped caves.

[0007] Another technical problem to be solved by the present invention is to provide a method for using the bearing platform suitable for vertical drilling of rock mass on the top of flat-topped caves.

[0008] To solve the above problems, the present invention provides a support platform for vertical drilling of the roof rock mass of a flat-topped cave, characterized in that: the support platform includes a trough base placed on a fixed base, a trough body placed on the trough base, a lifting platform placed on the trough body, and a chuck for fixing the drilling rig; two sets of connecting pipes are symmetrically arranged at the four corners of the fixed base, and the connecting pipes are connected to the support structure placed under the rock mass by fasteners; the top of the trough body is provided with an end cap for pressing against the roof rock mass, and a pair of guide plates and a pair of positioning plates are respectively provided on both sides of its bottom; the lifting platform includes a lifting body and a rocker arm sleeved on the trough body; a magnetic metal plate is provided on one side of the lifting body, and the chuck is provided on the corresponding side; a connector with a through hole is provided on the side of the lifting body perpendicular to the magnetic metal plate, and the rocker arm is provided in the through hole; a serration I is provided on one side of the trough body adjacent to the chuck.

[0009] The fixed base is connected to the tank base by leveling bolts.

[0010] Each of the connecting tubes has a diameter of 48mm, a length greater than 30cm, and is parallel to the edge of the fixed base.

[0011] The chuck includes a fixed plate connected to the lifting body and a pair of semi-circular clamps; the two ends of the pair of clamps are connected together by fixing bolts III, and the drilling rig is installed inside the clamps; the sides of the clamps are connected to the fixed plate by connecting plates.

[0012] The fixing plate is connected to the lifting body by fixing bolt I.

[0013] The lifting body is connected to the groove by fastening screws.

[0014] The lifting body is a hollow rectangular column, and one of its inner walls is provided with saw teeth II that match and contact the saw teeth I.

[0015] The rocker arm includes a metal rod inserted into the through hole and a screw connected to the metal rod; one end of the metal rod has an opening into which the screw is inserted; both ends of the screw are connected to handles by threads.

[0016] The diameter of the screw is slightly smaller than the diameter of the opening.

[0017] The pair of positioning plates are connected to the groove body via bolt holes and fixing bolts II.

[0018] The pair of guide plates are connected to the groove body via an arc-shaped through hole and an adjusting bolt.

[0019] The height of the guide plate is greater than the height of the positioning plate, and the two are aligned vertically.

[0020] The angle adjustment range of the tank is 180°.

[0021] The method of using the bearing platform for vertical drilling in the rock mass of a flat-topped cave, as described above, includes the following steps: (1) Place the drill rig downward into the chuck, tighten the fixing bolt III on the clamp in the chuck to fix the drill rig, and keep the drill rod and the groove body facing the same direction; (2) Connect the connecting pipe on the fixed base to the support structure under the rock mass using fasteners; (3) Move the adjusting bolt within the arc-shaped through hole area in the guide plate, adjust the clamping angle of the groove to the preset angle, and then tighten the adjusting bolt; (4) The threaded rod connected below the top end cap is located inside the groove. Adjust the length of the threaded rod by screwing it in so that the top end cap is pressed against the top rock mass. Move the screw in the rocker arm, hold the long end and screw it in clockwise to make the top of the drill rod aligned with the preset drilling position. (5) After the connection is completed, install the monitoring equipment with the magnetic support on the magnetic metal sheet. After the equipment is debugged to be in normal operation, turn on the power and start the drilling operation. (6) Control the drilling rig at a low speed and slowly rotate the rocker arm clockwise to make the drill rod contact the surface of the roof rock mass. After the drill rod enters the rock mass, slowly increase the speed while controlling the rocker arm to slow down the drilling speed. Use colored tape to mark the drilling depth at the marked position on the drill rod. After the drilling rig reaches the predetermined depth, stop drilling and keep rotating at a low speed for five seconds. Then rotate the rocker arm counterclockwise to remove the drill rod from the borehole. Stop the drilling rig when the drill rod is about to be removed to avoid enlarging the borehole. (7) After completing a single drilling operation, disassemble the connecting pipe and then move to other drilling locations to repeat steps (2) to (6) until all drilling operations are completed; (8) First, disassemble the connecting pipe and support structure; then loosen the fixing bolts Ⅲ on the clamp and remove the drilling machine; next, remove the lifting body from the tank, and then remove the chuck, rocker arm, magnetic metal plate, tank, tank base and fixed base in sequence. After cleaning the sand and dust on the device with an air compressor, store it.

[0022] Compared with the prior art, the present invention has the following advantages: 1. This invention installs a chuck, rocker arm, and magnetic metal plate on a lifting platform. The drilling rig is fixed by the clamp of the chuck, and the rocker arm and groove work together to control the lifting and lowering of the drilling rig. Magnetic support and monitoring equipment are installed on the magnetic metal plate. At the same time, the drilling angle is fixed and adjusted by the guide plate and positioning plate, and the bearing platform is connected to the site support structure by the fixed base. This not only effectively reduces the damage to the roof rock mass caused by drilling disturbance, but also improves the overall hole formation quality and efficiency of the flat-top cave roof rock mass anchoring project, thereby achieving high-quality and high-efficiency drilling operations.

[0023] 2. This invention uses an adjustable guide plate with a wide range of adjustable angles. By changing the orientation of the drilling rig, drilling can be achieved in different directions, making it widely applicable and versatile.

[0024] 3. The various devices of this invention are tightly connected and, together with the stable support structure under the top rock mass, can effectively improve the safety of construction personnel and grotto cultural relics.

[0025] 4. This invention is easy to install and simple to operate, breaking through the limitations of traditional drilling rig supports and usage methods in anchoring projects for the protection of stone cultural relics. It can be used for anchor hole drilling operations at different heights and angles in site protection. Attached Figure Description

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the lifting platform of the present invention.

[0029] Figure 3 This is a schematic diagram of the chuck of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the base of the groove of the present invention.

[0031] Figure 5 This is a schematic diagram illustrating the use of the present invention.

[0032] In the diagram: 1—Fixing Bolt I; 2—Chuck; 3—Fixing Plate; 4—Lifting Body; 5—Rocker; 6—Connecting Plate; 7—Handle; 8—Fastening Screw; 9—Magnetic Metal Sheet; 10—Trench; 11—Bolt Hole; 12—Trench Base; 13—Positioning Plate; 14—Fixing Bolt II; 15—Arc-shaped Through Hole; 16—Guide Plate; 17—Adjusting Bolt; 18—Fixing Base; 19—Leveling Bolt; 20—Drill Rig; 21—Clamping Hoop; 22—Fixing Bolt III; 23—Drill Rod; 24—Connecting Pipe; 25—Supporting Structure; 26—End Cap; 27—Roof Rock Mass. Detailed Implementation

[0033] like Figures 1-4 As shown, a support platform suitable for vertical drilling of the rock mass of a flat-topped cave is provided. The support platform includes a trough base 12 placed on a fixed base 18, a trough 10 placed on the trough base 12, a lifting platform placed on the trough 10, and a chuck 2 for fixing the drilling rig 20.

[0034] Two sets of connecting pipes 24 are symmetrically arranged at the four corners of the fixed base 18. The connecting pipes 24 are connected to the support structure 25 located at the bottom of the rock mass by fasteners. The top of the trough 10 is provided with an end cap 26 for pressing the top plate rock mass 27. A pair of guide plates 16 and a pair of positioning plates 13 connected together are respectively provided on both sides of its bottom. The lifting platform includes a lifting body 4 and a rocker arm 5 sleeved on the trough 10. A magnetic metal plate 9 is provided on one side of the lifting body 4, and a clamp 2 is provided on the corresponding side. A connector with a through hole is provided on the side of the lifting body 4 perpendicular to the magnetic metal plate 9. The rocker arm 5 is provided in the through hole. A serration I is provided on one side of the trough 10 adjacent to the clamp 2.

[0035] The fixed base 18 is connected to the tank base 12 by the leveling bolt 19.

[0036] Each connecting tube 24 has a diameter of 48mm, a length greater than 30cm, and is parallel to the edge of the fixed base 18.

[0037] The chuck 2 includes a fixed plate 3 connected to the lifting body 4 and a pair of semi-circular clamps 21; the two ends of the pair of clamps 21 are connected together by fixing bolts III 22, and the drilling rig 20 is installed inside the clamps 21; the sides of the clamps 21 are connected to the fixed plate 3 by connecting plates 6. The chuck 2 is used to fix the drilling rig 20, and different chucks 2 can be selected for different drilling rigs 20.

[0038] The fixed plate 3 is connected to the lifting body 4 by the fixing bolt I1.

[0039] The lifting body 4 is connected to the trough body 10 by fastening screws 8.

[0040] The lifting body 4 is a hollow rectangular column, and one of its inner walls is provided with saw teeth II that match and contact the saw teeth I.

[0041] The rocker arm 5 includes a metal rod inserted into a through hole and a screw connected to the metal rod; one end of the metal rod has an opening into which the screw is inserted; both ends of the screw are connected to handles 7 by threads.

[0042] The diameter of the screw is slightly smaller than the diameter of the opening, allowing the screw to slide. It applies force using the lever principle, with the long end of the screw bearing the weight, making it suitable for operation in confined spaces.

[0043] A pair of positioning plates 13 are connected to the tank body 10 through bolt holes 11 and fixing bolts II 14 to fix the position of the tank body 10.

[0044] A pair of guide plates 16 are connected to the tank body 10 via arc-shaped through holes 15 and adjusting bolts 17, for adjusting the angle of the tank body 10.

[0045] The height of the guide plate 16 is greater than the height of the positioning plate 13, and the two are aligned vertically.

[0046] The angle adjustment range of the tank body 10 is 180°.

[0047] The magnetic metal sheet 9 is used to fix the magnetic support and connect various monitoring devices.

[0048] A threaded rod is connected below the end cap 26. The top cap is circular, with a diameter larger than that of the threaded rod. The threaded rod cannot be moved inside the groove; the position of the top end cap is adjusted by screwing in the threaded rod to change its length.

[0049] The method for using a bearing platform suitable for vertical drilling of rock masses on the top of flat-topped caves includes the following steps: (1) Place the drill rig 20 downward into the chuck 2, tighten the fixing bolts Ⅲ22 on the clamp 21 in the chuck 2 to fix the drill rig 20, and keep the drill rod 23 aligned with the groove 10. (2) Connect the connecting pipe 24 on the fixed base 18 to the support structure 25 at the bottom of the rock mass using fasteners; (3) Move the adjusting bolt 17 within the arc-shaped through hole 15 area in the guide plate 16, adjust the clamping angle of the groove 10 to the preset angle, and then tighten the adjusting bolt 17. (4) The threaded rod connected below the top end cap 26 is located inside the groove 10. By screwing in the threaded rod to adjust the length, the top end cap 26 is pressed against the top rock body 27. Move the screw in the rocker arm 5, hold the long end and screw it clockwise to make the top of the drill rod 23 aligned with the preset drilling position. (5) After the connection is completed, install the monitoring equipment for the magnetic support on the magnetic metal sheet 9. After the equipment is debugged to be running normally, turn on the power and start the drilling operation. (6) Control the drilling rig 20 at a low speed and slowly rotate the rocker arm 5 clockwise to make the drill rod 23 contact the surface of the roof rock mass 27; after the drill rod 23 enters the rock mass, slowly increase the speed and control the rocker arm 5 to ensure that the drilling speed is not too fast. When encountering hard rock layers, the speed should be increased appropriately. At the same time, control the rocker arm 5 to slow down the drilling speed and use colored tape to wrap around the drill rod marking position to mark the drilling depth; after the drilling rig 20 reaches the predetermined depth, stop drilling and keep rotating at a low speed for five seconds. Then rotate the rocker arm 5 counterclockwise to withdraw the drill rod 23 from the borehole. When the drill rod 23 is about to withdraw, stop the drilling rig 20 to avoid enlarging the borehole. (7) After completing a single drilling operation, disassemble the connecting pipe 24, and then move to other drilling positions to repeat steps (2) to (6) until all drilling operations are completed; (8) First, disassemble the connecting pipe 24 and the support structure 25; then loosen the fixing bolt Ⅲ22 on the clamp 21 and remove the drilling machine 20; next, remove the lifting body 4 from the tank 10, and then remove the chuck 2, rocker arm 5, magnetic metal sheet 9, tank 10, tank base 12 and fixed base 18 in sequence. After cleaning the sand and dust on the device with an air compressor, store it.

Claims

1. A bearing platform suitable for vertical drilling of rock masses in flat-topped caves, characterized in that: The support platform includes a trough base (12) placed on a fixed base (18), a trough (10) placed on the trough base (12), a lifting platform placed on the trough (10), and a chuck (2) for fixing the drilling rig (20); two sets of connecting pipes (24) are symmetrically arranged at the four corners of the fixed base (18), and the connecting pipes (24) are connected to the support structure (25) placed under the rock mass by fasteners; the top of the trough (10) is provided with an end cap (26) for pressing the top rock mass (27), and a pair of guide plates (16) and a pair of positioning plates (13) are respectively provided on both sides of its bottom; the lifting platform includes a lifting body (4) sleeved on the trough (10) and a rocker arm (5); a magnetic metal plate (9) is provided on one side of the lifting body (4), and the chuck (2) is provided on the corresponding side; the side of the lifting body (4) perpendicular to the magnetic metal plate (9) is provided with a belt A connecting piece with a through hole, the rocker arm (5) is provided in the through hole; a serration I is provided on one side of the groove (10) adjacent to the chuck (2); the chuck (2) includes a fixing plate (3) connected to the lifting body (4) and a pair of semi-circular clamps (21); the two ends of the pair of clamps (21) are connected together by fixing bolts III (22), and the drill (20) is provided in the clamp (21); the side of the clamp (21) is connected to the fixing plate (3) through a connecting plate (6); the lifting body (4) is a hollow rectangular prism, and a serration II that matches and contacts the serration I is provided on one side of its inner wall; the rocker arm (5) includes a metal rod inserted into the through hole and a screw connected to the metal rod; one end of the metal rod has an opening, and the screw is inserted into the opening; the two ends of the screw are connected to handles (7) by threads; the diameter of the screw is slightly smaller than the diameter of the opening.

2. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The fixed base (18) is connected to the groove base (12) by a leveling bolt (19).

3. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: Each of the connecting tubes (24) has a diameter of 48 mm, a length greater than 30 cm, and is parallel to the edge of the fixed base (18).

4. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The fixed plate (3) is connected to the lifting body (4) by fixing bolt I (1).

5. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The lifting body (4) is connected to the groove (10) by fastening screws (8).

6. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The pair of positioning plates (13) are connected to the groove (10) through bolt holes (11) and fixing bolts II (14).

7. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: A pair of guide plates (16) are connected to the groove (10) through an arc-shaped through hole (15) and an adjusting bolt (17).

8. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The height of the guide plate (16) is greater than the height of the positioning plate (13), and the two are aligned vertically.

9. The bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 1, characterized in that: The angle adjustment range of the groove (10) is 180°.

10. The method of using the bearing platform for vertical drilling of flat-topped cave roof rock mass as described in claim 7, comprising the following steps: (1) Place the drill (20) downward into the chuck (2), tighten the fixing bolt III (22) on the clamp (21) in the chuck (2) to fix the drill (20), and keep the drill rod (23) aligned with the groove (10); (2) Connect the connecting pipe (24) on the fixed base (18) to the support structure (25) under the rock mass using fasteners; (3) Move the adjusting bolt (17) in the area of ​​the arc-shaped through hole (15) in the guide plate (16), adjust the clamping angle of the groove (10) to the preset angle, and then tighten the adjusting bolt (17). (4) The threaded rod connected below the top end cap (26) is located inside the groove (10). By screwing in the threaded rod, the length of the top end cap (26) is adjusted so that the top end cap (26) presses against the top rock mass (27). Move the screw in the rocker arm (5), hold the long end and screw it clockwise to make the top of the drill rod (23) aligned with the preset drilling position. (5) After the connection is completed, install the monitoring equipment for the magnetic support on the magnetic metal sheet (9). After the equipment is debugged to run normally, turn on the power and start drilling. ⑹ Control the drilling rig (20) at a low speed and slowly rotate the rocker arm (5) clockwise to make the drill rod (23) contact the surface of the top rock mass (27); after the drill rod (23) enters the rock mass, slowly increase the speed and at the same time control the rocker arm (5) to slow down the drilling speed, and use colored tape to wrap around the drill rod marking position to mark the drilling depth; after the drilling rig (20) reaches the predetermined depth, stop drilling and keep rotating at a low speed for five seconds, then rotate the rocker arm (5) counterclockwise to remove the drill rod (23) from the borehole, and stop the drilling rig (20) when the drill rod (23) is about to be removed to avoid enlarging the borehole; (7) After completing a single drilling operation, disassemble the connecting pipe (24), and then move to other drilling positions to repeat steps (2) to (6) until all drilling operations are completed; (8) First, disassemble the connecting pipe (24) and the support structure (25); then loosen the fixing bolt Ⅲ (22) on the clamp (21) and remove the drilling machine (20); next, remove the lifting body (4) from the tank (10), and remove the chuck (2), rocker arm (5), magnetic metal sheet (9), tank (10), tank base (12) and fixed base (18) in sequence. After cleaning the sand and dust on the device with an air compressor, store it.

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