Excavation construction method and equipment for rock wall beam of underground powerhouse of pumping and storage project

Abstract

The invention belongs to the technical field of constructional engineering, particularly relates to a pumping and storage engineering underground powerhouse rock wall beam excavation construction method and equipment, and provides the following scheme aiming at the problem that the existing rock wall beam excavation construction equipment lacks an effective fixed angle supporting measure: the method comprises the following steps: preparing wind, water and electricity in a hole, preparing constructors and tools in place, and carrying out construction; the measurement operation is implemented by professionals, point positions are accurately released by adopting a total station so as to facilitate installation of sample frame guide pipes, and vertical smooth blasting holes in each area adopt erection of a steel pipe sample frame so as to control the drilling precision. According to the excavation construction method and equipment for the rock wall beam of the underground powerhouse of the pumping and storage project, in the rock wall beam excavation construction process, drilling personnel can carry out fixed-point and fixed-angle supporting on a pneumatic drill used for drilling blast holes, so that the pneumatic drill can drill the blast holes according to design requirements; the condition of drilling deviation in the drilling process is avoided, the drilling precision speed is remarkably improved, the construction efficiency is improved, and the construction progress is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a construction method and equipment for excavating rock wall beams in an underground powerhouse of a pumped storage project. Background Art

[0002] The main function of the rock wall beam is to support the rock mass or structure above it and transfer the soil pressure, water pressure, structural deadweight and seismic force they bear to the deep stable bedrock. By providing strong anchoring force, it significantly enhances the overall stability of the rock slope and prevents collapse, sliding or excessive deformation.

[0003] During the rock wall beam excavation construction process, workers are required to use hand-held pneumatic drills to drill blasting holes. However, the drilling accuracy requirements for blasting holes are high, and the probability of drill misalignment during manual drilling is high. During the construction process, taking remedial measures after drill misalignment requires a lot of time, which has a greater impact on the construction progress. Summary of the Invention

[0004] The invention discloses a construction method and equipment for excavating rock wall beams in an underground powerhouse of a pumped storage project, aiming to solve the technical problem in the background art that existing rock wall beam excavation construction equipment lacks effective fixed-angle support measures.

[0005] The present invention proposes a construction method for excavating rock wall beams in an underground powerhouse of a pumped storage project, comprising the following steps: S1. The ventilation, water, and electricity systems in the tunnel are ready, and the construction personnel and equipment are in place. The surveying work is carried out by professionals. A total station is used to accurately lay out the points for the installation of the sample frame guide tube. The vertical light blasting holes in each area are equipped with steel pipe sample frames to control the drilling accuracy. All drilling sample frames are made of Φ48 steel pipes. After the support sample frames are erected, the corresponding control elevation is marked on the support sample frames through measurement and layout. The elevation control steel pipe is installed according to the elevation and initially fixed with steel pipe fasteners. The elevation control steel pipe center elevation is then measured and tested. S2. Hand drill operators drill holes manually according to the zoning and segmentation, strictly following the measurement and layout of the blasthole positions. YT28 pneumatic leg drills are used for drilling. The drilling accuracy is controlled by internal and external guide tubes. The Φ48 external guide tube has been fixed on the sample frame. A small drill rod positioning device independently developed by the project department is used. The drill bit can be installed after the Φ32 internal guide tube is placed on the drill rod. The drilling accuracy is controlled by the guide tube. S3. Use the support frame platform to manually divide and segment the charges according to the blasting design parameters, connect the blasting network, and strictly abide by the safe blasting operation procedures for charging. Before charging, first use Feng Shui to flush the borehole, and use 1 / 2Φ32mm light-explosive charge to charge. Tie the charge and detonating cord on bamboo strips and put them into the hole. Use the detonating cord to transmit the explosion. After the charge and blasting network are connected, the blaster and the on-duty technician will review and check. After confirmation, evacuate personnel and equipment and set the alarm. The blaster will be responsible for detonation. 20 minutes after the cannon is fired, the blaster will enter the hole to check whether there is a dud. If there is, quickly eliminate it before entering the next process.

[0006] A construction device for excavating rock wall beams in an underground powerhouse of a pumped storage project is used for the above-mentioned construction method for excavating rock wall beams in an underground powerhouse of a pumped storage project. The construction device includes a hollow tube for support, a fixed plate is fixedly connected to the upper side of the hollow tube, a base is fixedly connected to the bottom of the hollow tube, and a hand drill is provided above the fixed plate. A fixed angle support module is provided on the outside of the hand drill, and a locking and anti-slip module is provided on the outside of the base.

[0007] In a preferred embodiment, the fixed-angle support module includes a motor 1, the bottom of the motor 1 is fixedly connected to the bottom inner wall of the hollow tube, the output end of the motor 1 is connected to a screw rod 1 through a coupling, a movable rod is provided on the outside of the screw rod 1, two symmetrical grooves are provided on the outside of the hollow tube, the inner walls of the grooves are slidably connected to the outside of the movable rod, the upper side of the movable rod is fixedly connected to the bottom of the fixed plate, and three circular openings equidistantly distributed around the circumference are provided on the base, threaded rods 1 are provided in the circular openings, the upper sides of the threaded rods 1 are fixedly connected to knobs, and the bottoms of the threaded rods 1 are movably connected to spherical seats; The outer ends of the supporting legs are fixedly connected to the supporting legs, and the supporting legs are provided with circular holes, in which anchor nails are inserted, and the outer ends of the anchor nails are clamped with nail pulling frames, and the inner walls of the nail pulling frames are in contact with the outer ends of the anchor nails on the same side, and the outer ends of the nail pulling frames are movably connected to the outer ends of the supporting legs, and the outer ends of the supporting legs are fixedly connected to the limited frame, and the outer side of the base is fixedly connected to three guide blocks distributed equidistantly around the circumference, and the outer ends of the guide blocks are slidably connected to the inner walls of the limit frames on the same side; the upper side of the fixed plate is movably connected to a rotating column, and the outer side of the rotating column is slidably connected to a sleeve, and the bottom of the sleeve is fixedly connected to the upper side of the fixed plate, and the outer side of the sleeve is provided with four notches distributed equidistantly around the circumference, and balls are slidably connected in the slot holes, and the outer side of the rotating column is provided with a plurality of fitting grooves distributed equidistantly around the circumference, and the outer sides of the balls are clamped with the inner walls of the fitting grooves; The outside of the sleeve is slidably connected to a collar, the inner wall of the collar is provided with a tapered groove, the inner walls of the tapered grooves are in contact with the outside of the ball, the outside of the collar is provided with three rectangular openings equidistantly distributed around the circumference, the rectangular openings are slidably connected to limit rods, the bottoms of the limit rods are fixedly connected to the upper side of the fixed disk, and the bottom of the collar is fixedly connected to a spring 1, the spring 1 is located outside the sleeve, and the end of the spring 1 away from the collar is fixedly connected to the upper side of the fixed disk; The upper side of the rotating column is fixedly connected to a mounting plate, and the upper side of the mounting plate is fixedly connected to two symmetrical fixing seats, and the two fixing seats are movably connected to the same rotating table, and the side of the rotating table close to the hand drill is fixedly connected to two symmetrical guide rods, and the outer sides of the two guide rods are slidably connected to the same push-pull plate, and the push-pull plate is fixedly connected to the side opposite to the hand drill, and the side of the rotating table close to the hand drill is fixedly connected to a supporting plate, the upper side of the supporting plate is slidably connected to the outer side of the hand drill, and the upper side of the rotating table is fixedly connected to motor 2, a differential is provided on motor 2, and the output end of the differential is connected to threaded rod 2 through a coupling, and a moving block is provided on the outside of the threaded rod 2, and the bottom of the moving block is fixedly connected to the upper side of the push-pull plate; A notch is provided on the side of the rotating table away from the hand drill, a round rod is fixedly connected in the notch, a boss is fixedly connected to the upper side of the mounting plate, the outside of the boss and the round rod are movably connected to screw rod 2, the outside of the two screw rods 2 are provided with the same rotating sleeve, and the outside of the two fixing seats are fixedly connected to scale plates, the outside of the scale plates are provided with pointers, and the pointers are fixedly connected to the side opposite to the rotating table.

[0008] In a preferred solution, the locking and anti-slip module includes a locking ring, and the three locking rings are all located on the outside of the three threaded rods. The outside of the threaded rods is provided with an outer toothed ring, the bottom of the outer toothed ring is movably connected to the upper side of the base, and the inner wall of the locking ring is fixedly connected with a rack, and the rack is clamped with the outer toothed ring on the same side; the outside of the locking ring is slidably connected with a positioning buckle, the bottom of the positioning buckle is fixedly connected to the upper side of the base, and the side of the positioning buckle away from the outer toothed ring is fixedly connected with a spring 2, and the end of the spring 2 away from the positioning buckle is fixedly connected to the inner wall of the locking ring on the same side.

[0009] From the above, it can be seen that the method and equipment for excavating rock wall beams of underground powerhouses in pumped storage projects provided by the present invention can enable drilling personnel to support the hand drill used for drilling blasting holes at a fixed point and angle during the rock wall beam excavation construction process, so that the hand drill can drill blasting holes according to design requirements, avoiding the situation of drill running during the drilling process, significantly improving the drilling accuracy and speed, improving construction efficiency, and ensuring construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1This is a schematic diagram of the process flow of a rock wall beam excavation construction method for an underground powerhouse in a pumped storage project proposed by the present invention; Figure 2 This is a schematic diagram of the overall structure of a rock wall beam excavation construction equipment for an underground powerhouse in a pumped storage project proposed by the present invention; Figure 3 This is a schematic diagram of the front structure of a construction equipment for excavating rock wall beams in an underground powerhouse of a pumped storage project proposed by the present invention; Figure 4 This is a schematic diagram of the hollow tube and base structure of the rock wall beam excavation construction equipment for underground powerhouses in pumped storage projects proposed by the present invention; Figure 5 This is a schematic diagram of the support foot structure of a construction equipment for excavating rock wall beams in an underground powerhouse of a pumped storage project proposed by the present invention; Figure 6 This is a schematic diagram of the rotating column structure of the rock wall beam excavation construction equipment for underground powerhouses in pumped storage projects proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a rotating platform for construction equipment for excavating rock wall beams in underground powerhouses of pumped storage projects proposed by the present invention; Figure 8 This is a structural schematic diagram of a locking and anti-slip module for rock wall beam excavation construction equipment for underground powerhouses in pumped storage projects proposed by the present invention.

[0011] Figure: 1. Hand drill; 2. Fixed plate; 3. Hollow tube; 4. Base; 5. Fixed angle support module; 501. Motor 1; 502. Screw 1; 503. Movable rod; 504. Threaded rod 1; 505. Knob; 506. Ball seat; 507. Ball head; 508. Support foot; 509. Guide block; 510. Limit frame; 511. Anchor nail; 512. Nail remover; 513. Rotating column; 514. Ball bearing; 515. Fitting groove; 516. Ring; 517. Conical groove ;518, limit rod; 519, spring one; 520, mounting plate; 521, fixed seat; 522, rotating table; 523, support plate; 524, push-pull plate; 525, guide rod; 526, motor two; 527, threaded rod two; 528, screw rod two; 529, rotating sleeve; 530, dial; 531, pointer; 532, sleeve; 6, locking anti-slip module; 601, outer gear ring; 602, locking ring; 603, rack; 604, positioning buckle; 605, spring two. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] The present invention discloses a method and equipment for excavating rock wall beams in an underground powerhouse of a pumped storage project, which are mainly used in scenarios where existing rock wall beam excavation construction equipment lacks effective fixed-angle support measures.

[0014] Reference Figure 1 A construction method for excavating rock wall beams in an underground powerhouse of a pumped storage project comprises the following steps: S1. The ventilation, water, and electricity systems in the tunnel are ready, and the construction personnel and equipment are in place. The surveying work is carried out by professionals, and the points are accurately laid out using a total station to facilitate the installation of the sample frame guide tube. The vertical light blasting holes in each area are equipped with steel pipe sample frames to control the drilling accuracy. All drilling sample frames are made of Φ48 steel pipes. After the support sample frames are erected, the corresponding control elevation is marked on the support sample frames through measurement and layout. The elevation control steel pipe is installed according to the elevation and initially fixed with steel pipe fasteners. The elevation control steel pipe center elevation is then measured and tested. S2. Hand drill operators drill holes manually according to the zoning and segmentation, strictly following the measurement and layout of the blasthole positions. YT28 pneumatic leg drills are used for drilling. The drilling accuracy is controlled by internal and external guide tubes. The Φ48 external guide tube has been fixed on the sample frame. A small drill rod positioning device independently developed by the project department is used. The drill bit can be installed after the Φ32 internal guide tube is placed on the drill rod. The drilling accuracy is controlled by the guide tube. S3. Use the support frame platform to manually divide and segment the charges according to the blasting design parameters, connect the blasting network, and strictly abide by the safe blasting operation procedures for charging. Before charging, first use Feng Shui to flush the borehole, and use 1 / 2Φ32mm light-explosive charge to charge. Tie the charge and detonating cord on bamboo strips and put them into the hole. Use the detonating cord to transmit the explosion. After the charge and blasting network are connected, the blaster and the on-duty technician will review and check. After confirmation, evacuate personnel and equipment and set the alarm. The blaster will be responsible for detonation. 20 minutes after the cannon is fired, the blaster will enter the hole to check whether there is a dud. If there is, quickly eliminate it before entering the next process.

[0015] Reference Figure 2-Figure 8 In a preferred embodiment, a construction equipment for excavating rock wall beams of an underground powerhouse of a pumped storage project is applied to the above-mentioned construction method for excavating rock wall beams of an underground powerhouse of a pumped storage project. The construction equipment includes a hollow tube 3 for support, and the upper side of the hollow tube 3 is connected to a fixed plate 2 by bolts, and the bottom of the hollow tube 3 is connected to a base 4 by bolts, and a hand drill 1 is arranged above the fixed plate 2, and a fixed angle support module 5 is arranged on the outside of the hand drill 1, and a locking anti-slip module 6 is arranged on the outside of the base 4.

[0016] Specifically, the device utilizes the fixed-angle support module 5 to enable drilling personnel to support the hand drill used for drilling blasting holes at a fixed point and angle during the rock wall beam excavation construction process, so that the hand drill can drill blasting holes according to the design requirements, avoiding the situation of drill running during the drilling process, significantly improving the drilling accuracy and speed, improving construction efficiency, and ensuring construction progress.

[0017] Reference Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In a preferred embodiment, the fixed-angle support module 5 includes a motor 501, the bottom of the motor 501 is connected to the bottom inner wall of the hollow tube 3 by bolts, the output end of the motor 501 is connected to the screw 502 through a coupling, the outside of the screw 502 is provided with a movable rod 503, the outside of the hollow tube 3 is provided with two symmetrical grooves, the inner walls of the grooves are slidably connected to the outside of the movable rod 503, the upper side of the movable rod 503 is connected to the bottom of the fixed plate 2 by bolts, and three circular openings equidistantly distributed around the circumference are provided on the base 4, each of the circular openings is provided with a threaded rod 504, and the upper side of the threaded rod 504 is connected to a knob 505 by bolts; The bottom of the threaded rod 504 is rotatably connected to a spherical seat 506 through a bearing; a ball head 507 is provided in each of the three spherical seats 506, and the bottom of the ball head 507 is connected to a supporting foot 508 through a bolt. The supporting foot 508 is provided with a circular hole, and an anchor nail 511 is inserted into the circular hole. The outer side of the anchor nail 511 is clamped with a nail lifting frame 512, and the inner wall of the nail lifting frame 512 is in contact with the outer side of the anchor nail 511 on the same side. The outer side of the nail lifting frame 512 is rotatably connected to the outer side of the supporting foot 508 through a bearing, and the outer side of the supporting foot 508 is connected to the limit frame 510 through a bolt. The outer side of the base 4 is connected to three circumferentially equidistantly distributed guide blocks 509 through bolts, and the outer side of the guide block 509 is slidably connected to the inner wall of the limit frame 510 on the same side; The upper side of the fixed plate 2 is rotatably connected to a rotating column 513 through a bearing, and the outer side of the rotating column 513 is slidably connected to a sleeve 532. The bottom of the sleeve 532 is connected to the upper side of the fixed plate 2 by bolts. The outer side of the sleeve 532 is provided with four circumferentially equidistantly distributed slots, and the slots are slidably connected with balls 514. The outer side of the rotating column 513 is provided with a plurality of circumferentially equidistantly distributed interlocking grooves 515, and the outer sides of the balls 514 are snap-fitted to the inner walls of the interlocking grooves 515. The outer side of the sleeve 532 is slidably connected to a ring 516, and the sleeve The inner wall of the ring 516 is provided with a tapered groove 517, the inner wall of which contacts the outer side of the ball 514. The outer side of the collar 516 is provided with three rectangular openings equidistantly distributed around the circumference, each of which is slidably connected to a limit rod 518. The bottom of the limit rod 518 is bolted to the upper side of the fixed plate 2. A spring 1 519 is bolted to the bottom of the collar 516. The spring 1 519 is located outside the sleeve 532, and the end of the spring 1 519 away from the collar 516 is bolted to the upper side of the fixed plate 2. The upper side of the rotating column 513 is connected to a mounting plate 520 by bolts, and the upper side of the mounting plate 520 is connected to two symmetrical fixed seats 521 by bolts. The two fixed seats 521 are rotatably connected to the same rotating platform 522 through bearings. The side of the rotating platform 522 close to the hand drill 1 is connected to two symmetrical guide rods 525 by bolts. The outside of the two guide rods 525 is slidably connected to the same push-pull plate 524. The push-pull plate 524 is connected to the side opposite to the hand drill 1 by bolts, and the side of the rotating platform 522 close to the hand drill 1 is connected to a supporting plate 523 by bolts. The upper side of the supporting plate 523 is slidably connected to the outside of the hand drill 1. The upper side of the rotating platform 522 is connected to the second motor 526 by bolts. The second motor 526 is provided with a differential. The output end of the differential is connected to the second threaded rod 527 through a coupling. The outside of the second threaded rod 527 is provided with a moving block. The bottom of the moving block is connected to the upper side of the push-pull plate 524 by bolts. A notch is provided on the side of the rotating table 522 away from the hand drill 1, and a round rod is connected to the notch by bolts. A boss is connected to the upper side of the mounting plate 520 by bolts. The outside of the boss and the round rod are rotatably connected to screw rod 2 528 through bearings. The outside of the two screw rods 528 is provided with the same rotating sleeve 529, and the outside of the two fixing seats 521 are connected to dials 530 by bolts. The outside of the dials 530 is provided with pointers 531, and the pointer 531 is connected to the side opposite to the rotating table 522 by bolts.

[0018] In specific application scenarios, the fixed-angle support module 5 is mainly suitable for the fixed-angle support link in the fixed-angle support process, that is, the fixed-angle support module 5 uses the threaded rod 504, the spherical seat 506, the ball head 507 and the support foot 508 to quickly and conveniently achieve leveling of the base 4, thereby providing a stable platform for the hand drill 1 to drill according to the design requirements, ensuring that the hand drill 1 can more accurately locate the drilling position, and using the anchor nail 511 and the nail remover 512 to prevent the device from being offset or falling due to the reaction force and vibration when the hand drill 1 is drilling, thereby ensuring the safety of the equipment, and using the collar 516, the conical groove 517 and the ball 514 to quickly complete the setting and locking of the horizontal deflection angle of the hand drill 1, which greatly simplifies the operation difficulty and avoids the risk of deflection of the hand drill 1 during the drilling process.

[0019] Reference Figure 8 In a preferred embodiment, the locking and anti-dropping module 6 includes a locking ring 602, and the three locking rings 602 are all located on the outside of the three threaded rods 504. The outside of the threaded rods 504 is provided with an outer toothed ring 601, and the bottom of the outer toothed ring 601 is rotatably connected to the upper side of the base 4 through a bearing, and the inner wall of the locking ring 602 is connected to a rack 603 by bolts, and the rack 603 is clamped with the outer toothed ring 601 on the same side; the outside of the locking ring 602 is slidably connected to a positioning buckle 604, and the bottom of the positioning buckle 604 is connected to the upper side of the base 4 by bolts, and the side of the positioning buckle 604 away from the outer toothed ring 601 is connected to a spring 2 605 by bolts, and the end of the spring 2 605 away from the positioning buckle 604 is bolted to the inner wall of the locking ring 602 on the same side.

[0020] In a specific application scenario, the locking and anti-slipping module 6 is mainly suitable for the locking and anti-slipping link in the locking and anti-slipping process, that is, the locking and anti-slipping module 6 uses spring 2 605 and the locking ring 602 to enable the rack 603 to lock the outer gear ring 601, so that the threaded rod 1 504 connected to the outer gear ring 601 by threaded rotation cannot rotate freely, effectively reducing the possibility of the threaded rod 1 504 rotating under the heavy pressure of the load transmitted by the base 4, thereby ensuring the stable use of the device.

[0021] Working principle: Before drilling, the base 4 is set up in front of the hole position, so that the support foot 508 is in contact with the ground, and the anchor nail 511 is hammered into the ground. The knob 505 is turned, and the knob 505 drives the threaded rod 1 504 to rotate, so that the spherical seat 506 and the ball head 507 are offset at an angle, and the position on the base 4 is controlled to rise or fall, so that the base 4 is adjusted to the horizontal level. The motor 1 501 is started, and the motor 1 501 drives the screw rod 1 502 to rotate, so that the movable rod 503 drives the fixed plate 2 to rise or fall to the same level as the drilling position. The position of the hand drill 1 is obtained by overcoming the elastic force of the spring 1 519 and pressing down the collar 516. The narrow inner wall of the tapered groove 517 no longer squeezes the ball 514, thereby releasing the ball 514 from the engagement with the fitting groove 515. The mounting plate 520 is rotated, and the mounting plate 520 drives the rotating column 513 to rotate on the fixed plate 2. The horizontal deflection angle of the hand drill 1 is adjusted according to the design requirements. The rotating sleeve 529 is rotated to move the two screw rods 528 closer or farther away, so that the rotating table 522 drives the hand drill 1 to rotate in the vertical direction, thereby completing the vertical deflection angle setting of the hand drill 1. After completion, start motor 2 526, which drives threaded rod 2 527 to rotate, so that the push-pull plate 524 pushes the hand drill 1 to drill blasting holes on the rock wall. When leveling the base 4, overcome the elastic force of spring 2 605 to push the locking ring 602, and the locking ring 602 slides under the guidance of the positioning buckle 604, so that the rack 603 connected to the locking ring 602 is released from the outer gear ring 601, so that the outer gear ring 601 can rotate freely and the threaded rod 1 504 can rotate. After the adjustment is completed, loosen the locking ring 602, and under the elastic force of spring 2 605, the locking ring 602 quickly resets, so that the rack 603 and the outer gear ring 601 are re-engaged, and the outer gear ring 601 and the positioning buckle 604 no longer rotate.

[0022] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A construction method for excavating rock wall beams in an underground powerhouse of a pumped storage project, characterized in that: The following steps are involved: S1. The ventilation, water, and electricity systems in the tunnel are ready, and the construction personnel and equipment are in place. The surveying work is carried out by professionals, and the points are accurately laid out using a total station to facilitate the installation of the sample frame guide tube. The vertical light blasting holes in each area are equipped with steel pipe sample frames to control the drilling accuracy. All drilling sample frames are made of Φ48 steel pipes. After the support sample frames are erected, the corresponding control elevation is marked on the support sample frames through measurement and layout. The elevation control steel pipe is installed according to the elevation and initially fixed with steel pipe fasteners. The elevation control steel pipe center elevation is then measured and tested. S2. Hand drill operators drill holes manually according to the zoning and segmentation, strictly following the measurement and layout of the blasthole positions. YT28 pneumatic leg drills are used for drilling. The drilling accuracy is controlled by internal and external guide tubes. The Φ48 external guide tube has been fixed on the sample frame. A small drill rod positioning device independently developed by the project department is used. The drill bit can be installed after the Φ32 internal guide tube is placed on the drill rod. The drilling accuracy is controlled by the guide tube. S3. Use the support frame platform to manually divide and segment the charges according to the blasting design parameters, connect the blasting network, and strictly abide by the safe blasting operation procedures for charging. Before charging, first use Feng Shui to flush the borehole, and use 1 / 2Φ32mm light-explosive charge to charge. Tie the charge and detonating cord on bamboo strips and put them into the hole. Use the detonating cord to transmit the explosion. After the charge and blasting network are connected, the blaster and the on-duty technician will review and check. After confirmation, evacuate personnel and equipment and set the alarm. The blaster will be responsible for detonation. 20 minutes after the cannon is fired, the blaster will enter the hole to check whether there is a dud. If there is, quickly eliminate it before entering the next process.

2. A construction equipment for excavating rock wall beams in underground powerhouses of pumped storage projects, applied to the construction method for excavating rock wall beams in underground powerhouses of pumped storage projects according to claim 1, characterized in that: The construction equipment comprises a hollow tube (3) for support, the upper side of the hollow tube (3) is fixedly connected to a fixing plate (2), the bottom of the hollow tube (3) is fixedly connected to a base (4), a hand drill (1) is arranged above the fixing plate (2), a fixed angle support module (5) is arranged outside the hand drill (1), and a locking anti-drop module (6) is arranged outside the base (4).

3. The rock wall beam excavation construction equipment for underground powerhouse of a pumped storage project according to claim 1 is characterized in that: The fixed-angle support module (5) includes a motor (501), the bottom of the motor (501) is fixedly connected to the bottom inner wall of the hollow tube (3), the output end of the motor (501) is connected to a screw rod (502) through a coupling, the outside of the screw rod (502) is provided with a movable rod (503), the outside of the hollow tube (3) is provided with two symmetrical grooves, the inner walls of the grooves are slidably connected to the outside of the movable rod (503), the upper side of the movable rod (503) is fixedly connected to the bottom of the fixed plate (2), and the base (4) is provided with three circular openings equidistantly distributed around the circumference, and the circular openings are provided with threaded rods (504), the upper sides of the threaded rods (504) are fixedly connected to knobs (505), and the bottoms of the threaded rods (504) are movably connected to spherical seats (506).

4. The rock wall beam excavation construction equipment for underground powerhouses in pumped storage projects according to claim 3 is characterized in that: The three spherical seats (506) are each provided with a ball head (507), the bottom of each ball head (507) is fixedly connected to a supporting foot (508), a circular hole is provided on each supporting foot (508), an anchor nail (511) is inserted into the circular hole, a nail lifting frame (512) is clamped to the outside of each anchor nail (511), the inner wall of each nail lifting frame (512) is in contact with the outside of each anchor nail (511) on the same side, the outside of each nail lifting frame (512) is movably connected to the outside of each supporting foot (508), and the outside of each supporting foot (508) is fixedly connected to a limiting frame (510), and the outside of the base (4) is fixedly connected to three circumferentially equidistantly distributed guide blocks (509), and the outside of each guide block (509) is slidably connected to the inner wall of the limiting frame (510) on the same side.

5. The rock wall beam excavation construction equipment for underground powerhouse of pumped storage project according to claim 4, characterized in that: The upper side of the fixed disk (2) is movably connected to a rotating column (513), the outside of the rotating column (513) is slidably connected to a sleeve (532), the bottom of the sleeve (532) is fixedly connected to the upper side of the fixed disk (2), the outside of the sleeve (532) is provided with four circumferentially equidistantly distributed slots, each of which is slidably connected to a ball (514), and the outside of the rotating column (513) is provided with a plurality of circumferentially equidistantly distributed interlocking grooves (515), the outside of the ball (514) and the inner wall of the interlocking groove (515) are both engaged.

6. The equipment for excavating rock wall beams in underground powerhouses of pumped storage projects according to claim 5, characterized in that: The outside of the sleeve (532) is slidably connected to a collar (516), the inner wall of the collar (516) is provided with a tapered groove (517), the inner wall of the tapered groove (517) is in contact with the outside of the ball (514), the outside of the collar (516) is provided with three rectangular openings equidistantly distributed around the circumference, and the rectangular openings are slidably connected to limit rods (518), the bottoms of the limit rods (518) are fixedly connected to the upper side of the fixed disk (2), and the bottom of the collar (516) is fixedly connected to a spring 1 (519), the spring 1 (519) is located outside the sleeve (532), and the end of the spring 1 (519) away from the collar (516) is fixedly connected to the upper side of the fixed disk (2).

7. The equipment for excavating rock wall beams for underground powerhouses in pumped storage projects according to claim 6, characterized in that: The upper side of the rotating column (513) is fixedly connected to a mounting plate (520), and the upper side of the mounting plate (520) is fixedly connected to two symmetrical fixing seats (521). The two fixing seats (521) are movably connected to a same rotating platform (522). The rotating platform (522) is fixedly connected to a side close to the hand drill (1) with two symmetrical guide rods (525). The outside of the two guide rods (525) is slidably connected to a same push-pull plate (524). The push-pull plate (524) is opposite to the hand drill (1). The hand drill (1) is fixedly connected to the side of the rotating platform (522), and a supporting plate (523) is fixedly connected to the side of the rotating platform (522) close to the hand drill (1). The upper side of the supporting plate (523) is slidably connected to the outside of the hand drill (1). The upper side of the rotating platform (522) is fixedly connected to the second motor (526). The second motor (526) is provided with a differential. The output end of the differential is connected to the second threaded rod (527) through a coupling. The outside of the second threaded rod (527) is provided with a moving block. The bottom of the moving block is fixedly connected to the upper side of the push-pull plate (524).

8. The equipment for excavating rock wall beams for underground powerhouses in pumped storage projects according to claim 7, characterized in that: A notch is provided on a side of the rotating table (522) away from the hand drill (1), a round rod is fixedly connected in the notch, a boss is fixedly connected to the upper side of the mounting plate (520), the outsides of the boss and the round rod are movably connected to screw rod 2 (528), the outsides of the two screw rods 2 (528) are provided with a same rotating sleeve (529), and the outsides of the two fixing seats (521) are fixedly connected to dial plates (530), the outsides of the dial plates (530) are provided with pointers (531), and the pointers (531) are fixedly connected to the side opposite to the rotating table (522).

9. The equipment for excavating rock wall beams for underground powerhouses in pumped storage projects according to claim 8, characterized in that: The locking and anti-dropping module (6) includes a locking ring (602), and the three locking rings (602) are all located outside the three threaded rods (504). The outside of the threaded rods (504) is provided with an outer toothed ring (601), and the bottom of the outer toothed ring (601) is movably connected to the upper side of the base (4), and the inner wall of the locking ring (602) is fixedly connected with a rack (603), and the rack (603) is clamped with the outer toothed ring (601) on the same side.

10. The rock wall beam excavation construction equipment for underground powerhouses in pumped storage projects according to claim 9, characterized in that: The locking ring (602) is slidably connected to a positioning buckle (604) on the outside, the bottom of the positioning buckle (604) is fixedly connected to the upper side of the base (4), and the side of the positioning buckle (604) away from the outer gear ring (601) is fixedly connected to a second spring (605), and the end of the second spring (605) away from the positioning buckle (604) is fixedly connected to the inner wall of the locking ring (602) on the same side.

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