Impact of one-time wall cleaning and slotting - Rotary deep underground continuous wall slotting machine

Abstract

The present invention discloses an impact-rotation deep underground continuous wall slotting machine that clears and slots the wall in one go. When the drill rod of a high-frequency impact device presses against the top of a single drill bit's drive shaft, a roller drill is installed at the bottom of a guide frame, corresponding to the residual triangular area not covered by the two adjacent drill bits. The guide frame's weight and a hydraulic motor apply axial pressure and rotational torque to the roller drill, leveraging the roller drill's unique ability to crush rock through a combined impact, crushing, and milling action. When the drill rod of the high-frequency impact device presses against the top surface of a connecting beam connecting a group of drill bit drive shafts, a pair of horizontal milling rollers, with their axes parallel to the slot wall, are installed on either side of the connecting beam of the grouped drill bits, which is suspended and slides on the bottom beam of the slotting machine's guide frame, corresponding to the residual triangular area of ​​the impact-rotation drill bits. Using the high-frequency impact hammer's impact at the top of the connecting beam as the driving force, the horizontal milling rollers, under the action of an eccentric impact reaction force, produce a rotational impact to crush the residual rock.

Description

Technical Field

[0001] The present invention relates to an impact-rotation deep underground continuous wall slotting machine capable of clearing the wall and forming a slot in one go, which is suitable for constructing narrow and deep underground continuous walls and belongs to the field of slotting machine equipment. Background Art

[0002] The applicant has applied for an invention patent for "A suspended multi-drill bit rotary-impact combined tunneling engineering slotting machine" (application number: 201810659443.X, utility model application, application number 201820980721.7). The invention relates to a suspended multi-drill bit rotary-impact combined tunneling engineering slotting machine, including a walking device and a monitoring device with a hoisting device and a power system; an impact milling device is suspended at the traction end of the hoisting device, and the impact milling device includes a vertical guide frame, a correction device, grouped drill bits and corresponding vertical high-frequency impact devices; the drill bit drive shafts in each group are connected through a power transfer box arranged on the box-shaped bottom beam or middle cross beam of the guide frame, and are driven to rotate by the same power drive device; the drill rod of the high-frequency impact device is pressed against the top of a single drill bit drive shaft, or against the top surface of the connecting cross beam connecting a group of drill bit drive shafts, under the push of a buffer device or a plunger cylinder. A set of connecting beams for the drill drive shaft and the box-shaped bottom beam of the guide frame are movably connected via a set of suspended sliding devices. This slotting machine can efficiently and effectively perform slotting operations in various complex strata, including soil, rock, gravel, and boulders. The slotting process essentially implements a trenching mechanism that combines high-frequency impact and rotary milling. It is characterized by the ability to create narrow and deep slots while maintaining the integrity of the surrounding rock formations, thus possessing significant practical significance in foundation engineering.

[0003] However, in the process of implementing the above invention, the inventors of this application found that the above technology has at least the following technical problems:

[0004] The above slotting machine still has a portion of the slot section on the rectangular slot section that cannot be covered by the impact-rotation milling between the drill bits.

[0005] Therefore, further consideration needs to be given to a one-time crushing and cleaning of the residual rocks on the trench wall, so as to fully realize the high-frequency impact-rotation rock crushing mechanism of the entire trench section, as well as corresponding structural protection measures, to meet the needs of reservoir dam hazard removal and reinforcement and the construction of underground continuous walls for various deep foundation projects, and further improve the excavation efficiency of narrow and deep trenches. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an impact-rotary slotting machine with a more reasonable structural design, which can clean the wall and form the slot in one go without leaving any residue on the broken slot wall.

[0007] To solve the above technical problems, the present application provides an impact-rotation deep underground continuous wall slotting machine for one-time wall cleaning and slotting, comprising a suspended impact milling device, the impact milling device comprising a vertical guide frame, impact-rotation drill bits arranged in groups, and corresponding vertical high-frequency impact devices; the drill bit drive shafts in each group are connected via a power transfer box arranged in the guide frame and are driven to rotate by the same power drive device; the drill rod of the high-frequency impact device is pressed against the top of a single impact-rotation drill bit drive shaft, or against the top surface of a connecting beam connecting a group of drill bit drive shafts; the characteristics are:

[0008] When the drill rod of the high-frequency impact device is pressed against the top of the transmission shaft of a single impact-rotary drill bit, a cone drill is provided at the bottom of the guide frame, corresponding to the residual triangular area not covered by the two adjacent impact-rotary drill bits. The cone drill and the corresponding impact-rotary drill bit are driven to rotate by the same power drive device. The top of the drill rod of the cone drill is in contact with the upper box of the guide frame through a tapered roller bearing, so that the drill rod performs an up and down impact motion while rotating.

[0009] The guide frame's weight and hydraulic motor apply axial pressure and rotary torque to the cone drill, bringing into play the cone drill bit's unique function of crushing rocks through the combined effects of impact, rolling and milling.

[0010] When the drill rod of the high-frequency impact device is pressed against the top surface of the connecting beam connecting the transmission shaft of a group of impact-rotary drill bits, a pair of horizontal milling rollers with axes parallel to the groove wall are installed on both sides of the connecting beam of the group drill bits suspended and sliding on the bottom beam of the guide frame of the slotting machine, and the residual triangular area that the impact-rotary drill bits cannot cover is located. The surface of the horizontal milling roller is provided with grooves and cutter teeth, and the roller base is fixed to the bottom of the connecting beam of the group drill bits. The high-frequency impact hammer on the top of the connecting beam is used as the original power, and the horizontal milling roller is caused to impact-rotate under the action of the eccentric impact reaction force to crush the residual rock.

[0011] Preferably, a buffer device is further included, which is arranged at the upper and lower ends of the impact-rotating drill rod to keep the impacted rotary drill rod in a suspended state; the drill rod and the transmission gear of the power drive device are spline-connected to maintain the contact state between the impact hammer output device and the top end of the drill rod.

[0012] Preferably, the buffer devices provided at the upper and lower ends of the drill rod of the impact-rotary drill bit are respectively two layers of springs with different elastic moduli stacked on top and bottom;

[0013] The buffer device, located at the upper end of the drill rod of the impact-rotating drill bit, has an upper layer comprising a steel wire support spring with a small elastic modulus and a lower layer comprising a first annular spring with a large elastic modulus. The steel wire support spring abuts against the drill rod step above it, and the first annular spring is connected to a support seat on the upper housing of the guide frame via a thrust bearing.

[0014] The buffer device is placed at the lower end of the drill rod of the impact-rotating drill bit. The upper layer is a second annular spring with a large elastic modulus, and the lower layer is a steel wire positioning spring with a small elastic modulus. The second annular spring is connected to the lower box of the guide frame through a bidirectional thrust ball bearing, and the steel wire positioning spring abuts against the drill rod step below it.

[0015] Preferably, a detachable drill rod connector is installed on the top of the impact-rotary drill bit.

[0016] Preferably, the detachable drill rod connector is an impact cap threadedly connected to the top of the drill rod.

[0017] Preferably, the horizontal milling roller is cylindrical or spindle-shaped.

[0018] Preferably, the power drive device comprises a low-speed, high-torque, multi-curve hydraulic motor connected in series. By employing a low-speed, high-torque rotary hydraulic motor connected in series and a dedicated impact hammer with an extended piston stroke, the rotary and impact power can be increased within the constraints of the installation cross-sectional dimensions, thereby achieving the impact-rotation power required for efficient excavation in hard rock formations within narrow and deep trenches.

[0019] Preferably, the power transfer case is connected to the output shaft of the hydraulic motor using a spur gear, the spur gear is connected to the impact-rotation drill rod via a spline, and the lower end of the spur gear is supported on the lower box body via the bidirectional thrust ball bearing.

[0020] When the connecting crossbeam is impacted by the high-frequency impact device, the inner side of the horizontal milling roller is already within the drill bit's hole-forming range and is not subject to the rock and soil impact reaction force. However, the outer side of the horizontal milling roller is in contact with the remaining rock and soil in the slot wall and is therefore subject to the rock and soil impact reaction force. Under the action of the eccentric impact reaction force, the horizontal milling roller produces impact-rotation, thereby achieving high-frequency impact-rotation and simultaneous crushing of the slot wall rock. The above-mentioned high-frequency impact-rotation cutting device for the slot wall differs from similar milling shaft devices used in previous static pressure milling in terms of structure, mechanism, purpose, and function. This one-time wall-clearing and slotting impact-rotation deep underground continuous wall slotting machine aims to achieve high-frequency impact-rotation rock crushing across the entire cross-section, thereby improving rock excavation efficiency and promoting slot wall integrity. Its mechanism is driven by high-frequency impact, making it suitable for various rock formations, including hard ones.

[0021] As an improvement, further innovation and perfection of the aforementioned "a suspended multi-drill bit rotary-impact combined tunneling engineering slotting machine", the slotting machine of the present application also has the following structural characteristics: the wall cleaning horizontal milling roller is arranged at the bottom of the connecting beam, so it can adapt to the narrow space installation conditions in the narrow groove, which is conducive to increasing the diameter of the impact rotary cutting roller to increase the cutting torque. At the same time, it is equally important that the base of the groove wall high-frequency impact-rotary cutting device is arranged on the grouped drill bit connecting beam suspended by a sliding device under the bottom beam of the guide frame, so the directly impacted body is only the drill bit and roller shaft below the connecting beam, which has a small weight. Under the same impact force of the impact device, the impact acceleration increases, which can improve the impact rock crushing efficiency and is suitable for rock crushing in narrow grooves and deep groove walls.

[0022] The technical solution provided in this application has at least the following technical effects or advantages:

[0023] 1. By adding an impact-cutting device to the residual groove area that is not covered by the drill bit's impact-rotation milling, the goal of high-frequency impact-rotation full-section rock crushing is achieved, improving rock excavation efficiency and the integrity of the rectangular groove wall. It can handle various rock formations, including hard rock formations.

[0024] 2. The upper and lower ends of the drill rod shaft are respectively provided with spring buffer devices connected to the guide frame through steps, so that the impacted rotary drill rod and its drill bit are in a suspended state, thereby maintaining the contact state between the impact hammer output device and the top of the drill rod, and protecting the high-frequency impact hammer from damage caused by empty hitting; the spring buffer device adopts two layers of springs with different elastic moduli overlapping on the upper and lower sides. Its function is to strike the rock at the bottom of the groove under the normal impact head state. The drill rod only moves up and down a small amount. The wire support spring and the positioning spring are compressed to provide movement space. At the same time, due to its small elastic modulus, the impedance to the impact is very small, which is conducive to improving the impact transmission efficiency. When there is a cavity in the local formation or the guide frame is lifted, when the impact hammer causes a large displacement of the drill rod, the annular spring is also subjected to a large compression. Due to its large elastic modulus, it will generate a large impedance force, thereby avoiding excessive displacement of the drill rod and not damaging the impact hammer due to empty hitting.

[0025] 3. The use of a low-speed, high-torque rotary hydraulic motor in series with an upper and lower connection and a special impact hammer with an increased piston stroke solves the impact-rotation power required for efficient excavation of rock formations in narrow and deep grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation structure of Example 1 of the present invention.

[0027] Figure 2 for Figure 1 AA view of the .

[0028] Figure 3 for Figure 1 Partial left view of .

[0029] Figure 4 This is a schematic diagram of the installation structure of Example 2 of the present invention.

[0030] Figure 5 for Figure 4 side view.

[0031] Figure 6 for Figure 4 Partial side sectional view.

[0032] In the figure: machine lifting and hoisting system 1, power unit 2, guide frame 3, correction device 4, high-frequency impact hammer 5, guide frame bottom beam 6, connecting crossbeam 7, drill bit 8, horizontal milling roller 9, sliding suspension device 10, roller base 11, power, control and other pipeline inlets 12, slag discharge pipe 13, cone drill 14, support spring 15, first annular spring 16, plane thrust bearing 17, pedestal 18, support seat 19, upper box 20, impact-rotary drill pipe spur gear 21, spline 22, guide frame lower box 23, bidirectional thrust ball bearing 24, second annular spring 25, wire positioning spring 26, impact-rotary drill bit drive shaft 27, hydraulic motor 28, impact cap 29, lower box sealing cover 30, two tapered roller bearings 31, single tapered roller bearing 32. DETAILED DESCRIPTION

[0033] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods. Example

[0034] This embodiment provides an impact-rotation deep underground continuous wall slotting machine that can clean the wall and form the slots in one go. As an improvement, further innovation and perfection of the aforementioned "a suspended multi-drill rotary-impact combined tunneling engineering slotting machine", the basic structure is similar to that of the prior patent, such as Figure 1-Figure 3 As shown: it at least includes a main lifting and hoisting system 1, a power unit 2, power, control and other pipeline inlets 12, a slag discharge pipe 13, a guide frame 3, a correction device 4, a high-frequency impact hammer 5, a guide frame bottom beam 6, and a connecting beam 7 for installing each set of impact-rotary drill bit transmission shafts 27; the connecting beam 7 is movably installed under the guide frame bottom beam 6 through a sliding suspension device 10.

[0035] What is different from the above-mentioned prior machines is that, in the embodiment of the present invention, between the connecting beam 7 of the grouped drill bits suspended and sliding on the bottom beam of the guide frame of the grooving machine and the top of the impact-rotation drill bit 8, there are residual triangular areas on both sides of the connecting beam 7, and horizontal milling rollers 9 are arranged parallel to the grooved axis. The surface of the horizontal milling roller 9 is provided with grooves and teeth, and its roller base 11 is fixed to the bottom of the connecting beam of the grouped drill bits. The high-frequency impact hammer 5 on the top of the connecting beam is used as the original power, and under the action of the eccentric impact reaction force, the horizontal milling roller generates high-frequency impact-rotation to crush the residual rock.

[0036] The central axis of the horizontal milling roller 9 is impacted downward by the high-frequency hammer 5. The rock and soil on the side of the milling roller near the slot wall create an upward reaction force, generating a rotational force as it is impacted. This creates impact-rotational cutting, and the horizontal milling roller covers the slot section beyond the projection of the drill bit, thus achieving impact-rotational excavation across the entire slot section. Furthermore, due to the low mass of the impacted body and the high impact acceleration, the hard rock of the slot wall can be effectively broken.

[0037] The horizontal milling rollers in this embodiment are horizontal cylindrical or spindle-shaped. To increase the rotary cutting torque and maximize the diameter of the center portion of the horizontal milling roller, this embodiment employs a spindle shape. Alternatively, the left and right horizontal milling rollers may be staggered to further increase their diameter.

[0038] In order to achieve the impact work efficiency of rock crushing in each impact of the milling roller teeth of the high-frequency impact rotary cutting device for the slot wall, the number of teeth can be reasonably adjusted under a certain impact energy.

[0039] Impact is mainly used to deal with hard rocks. Under this working condition, the tooth material of the high-frequency impact rotary cutting device of the groove wall is made of relatively soft alloy steel. Example

[0040] This embodiment is aimed at the one-to-one structure of the impact hammer and the drill bit in the previously authorized slotting machine. In order to increase the space for placing the hydraulic motor and the high-power impact hammer, the rotary transmission gearbox needs to increase the center distance between the drill bits, which will correspondingly increase the residual area that is not covered between the drill bits.

[0041] In order to solve the above problems, this embodiment provides an impact-rotation slotting machine that can clean the wall and form the slots in one go. Figure 4-Figure 6 As shown:

[0042] When the drill rod of the high-frequency impact device is pressed against the top of the single impact-rotary drill bit transmission shaft 27, a cone drill 14 with both rotary milling and impact crushing functions is provided at the bottom of the guide frame, corresponding to the residual triangular area not covered by the two impact-rotary drill bits. The upper end of the drill rod of the cone drill 14 is connected to the rotary gear of the power transfer case through the cone drill spur gear. The upper end of the cone drill drill rod is provided with a single tapered roller bearing 32, and the lower end is abutted against the lower box sealing cover 30 through two oppositely placed tapered roller bearings 31; in this way, the drill rod performs up and down impact motion while rotating.

[0043] The rotary gearbox is also connected to the impact-rotation drill pipe through a spur gear 21 and a spline 22 , and the lower end of the spur gear is supported on the lower box body through a bidirectional thrust ball bearing 24 .

[0044] The cone drill and the corresponding impact-rotary drill bit are driven to rotate by the same power drive device. The top of the drill rod of the cone drill is in contact with the upper box 20 of the guide frame through a single tapered roller bearing 32. The guide frame's weight and hydraulic motor apply axial pressure and rotational torque to the cone drill, giving full play to the cone drill bit's unique function of crushing rocks through the combined effects of impact, crushing and milling.

[0045] In addition to the high-frequency percussion-rotation method used by the main drill bit for excavation, the roller drill, located in the residual area beyond its reach, also performs rotary milling and percussion functions. Sufficient axial pressure and rotary torque are applied to the roller drill through the drill pipe. As the roller drill bit rotates, each cone rolls around its own axis in the opposite direction of the drill bit's rotation. This pressure-applied rolling process crushes the rock. Because the cones alternate between single and double teeth contacting the rock, the axis of the cone is high when a single tooth touches the ground, and low when a double tooth touches the ground. This repetitive process subjects the rock to periodic impact. Furthermore, due to the cone's overshoot, backswing (the cone tops of the three cones do not coincide with the drill bit's center), movement (the axes of the three cones do not intersect the drill bit's centerline), and the cone's complex conical shape, the cones also experience a certain amount of sliding as they operate at the bottom of the groove, producing a cutting effect on the rock. Therefore, rock crushing by a roller drill is actually a combination of percussion, crushing, and milling.

[0046] Preferably, this embodiment further includes buffer devices respectively provided at the upper and lower ends of the rotary impact drill rod.

[0047] The buffer device in this embodiment is composed of two overlapping layers of springs with different elastic moduli and thrust bearings:

[0048] The upper end of the drill rod of the impact-rotating drill bit is a buffer device with two layers of overlapping springs. The upper layer is a wire support spring 15 with a small elastic modulus. The support spring is connected to the drill rod step above it. The lower layer is a first annular spring 16 with a large elastic modulus. The first annular spring 16 is in contact with the support seat 19 and the base 18 on the upper box 20 of the guide frame through a one-way thrust ball bearing 17.

[0049] The impact-rotating drill bit has two layers of overlapping springs at the lower end of the drill rod. The upper layer is a second annular spring 25 with a large elastic modulus, and the lower layer is a wire positioning spring 26 with a small elastic modulus. The second annular spring is connected to the lower box 23 of the guide frame through a bidirectional thrust ball bearing 24, and the positioning spring abuts against the drill rod step below it.

[0050] In this embodiment, springs with different elastic moduli are provided through the steps of the drill rod shaft and are placed on top of the guide frame, so that the impacted rotary drill rod and its drill bit are in a highly floating state, thereby maintaining the contact state between the impact hammer output device and the top of the drill rod. It also plays a role in protecting the high-frequency impact hammer from damage due to empty strikes.

[0051] The slag suction pipe of the slag discharge system in this example goes from the top of each drill bit upward through the outside of the gear box, converges into the main pipe inside the frame, and goes up to the joint at the top of the frame to connect with the sand suction pump hose.

[0052] In order to solve the problem of damage and replacement of the impact contact surface, a detachable drill rod top connector is used on the top of the drill rod; in this embodiment, the top of the impact-rotary drill bit is screwed with an impact cap 29 through a thread.

[0053] In this embodiment, there are five impact-rotary drill bits. The two hydraulic motors at both ends rotate in opposite directions, each driving two impact-rotary drill bits and two roller drills. The two hydraulic motors in the middle drive one impact-rotary drill bit and four roller drills, and their rotation directions can be adjusted as needed.

[0054] The power drive system of this embodiment utilizes a double-stacked, low-speed, high-torque, multi-curve hydraulic motor 28 to maximize the motor's rotary power within the compact guide frame space. The upper and lower housings 20 and 23 of the rotary gearbox, to which the hydraulic motor 28 is powered, utilize filled-in cast steel housings to enhance structural stability, including the transmission drill rod and related components during impact energy transmission, and to facilitate achieving a moderate weight-on-bit (WOB) for the guide frame's weight.

[0055] As a preferred embodiment, under the condition of the size restriction of the groove thickness, in order to increase the output power of the impact hammer and meet the impact work efficiency of the lower cutter of the drill bit, the impact hammer is modified on the basis of the existing breaker hammer, and the stroke of the piston rod is increased. To adapt to underwater work, inflation is adopted to maintain internal and external pressure balance or slightly positive pressure to prevent mud and water from entering, and the components in the box are sealed and protected.

[0056] As a preference, in this embodiment, within the power limit of the impact hammer, in order to meet the requirement of the cutter teeth impact specific power, the drill bit groove is enlarged and the number of cutter teeth under the drill bit is reasonably adjusted.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. An impact-rotation deep underground continuous wall slotting machine capable of clearing the wall and forming a slot in one go, comprising a suspended impact milling device comprising a vertical guide frame, grouped impact-rotation drill bits, and corresponding vertical high-frequency impact devices; the drill bit drive shafts within each group are connected via a power transfer case disposed within the guide frame and are driven for rotation by a common power drive device, comprising a low-speed, high-torque, multi-curve hydraulic motor connected in series up and down; the drill rod of the high-frequency impact device presses against the top of a single impact-rotation drill bit drive shaft, or against the top surface of a connecting beam connecting a group of drill bit drive shafts; and characterized by: When the drill rod of the high-frequency impact device is pressed against the top of the transmission shaft of a single impact-rotary drill bit, a cone drill is provided at the bottom of the guide frame, corresponding to the residual triangular area not covered by the two adjacent impact-rotary drill bits. The upper end of the drill rod of the cone drill is connected to the power transfer case through a gear. The cone drill and the corresponding impact-rotary drill bit are driven to rotate by the same power drive device. The top of the drill rod of the cone drill is in contact with the upper housing of the guide frame through a tapered roller bearing. Under the combined action of axial pressure and rotary torque, the cone drill bit crushes the rock by a combined action of impact, crushing and milling. When the drill rod of the high-frequency impact device is pressed against the top surface of the connecting beam connecting the transmission shaft of a group of impact-rotary drill bits, a pair of horizontal milling rollers with axes parallel to the slot wall are installed on both sides of the connecting beam of the group drill bits suspended and sliding on the bottom beam of the guide frame of the slotting machine, and the surfaces of the horizontal milling rollers are provided with grooves and cutter teeth, and the roller base is fixed to the bottom of the connecting beam of the group drill bits. The high-frequency impact hammer on the top of the connecting beam is used as the original power, and the horizontal milling rollers are caused to impact-rotate and crush the residual rock under the action of the eccentric impact reaction force; The device further comprises a buffer device, which is provided at the upper and lower ends of the drill rod of the impact-rotary drill bit to keep the impacted rotary drill rod in a suspended state; the drill rod and the transmission gear of the power drive device are connected by a spline to maintain the contact state between the impact hammer output device and the top end of the drill rod; The buffer devices provided at the upper and lower ends of the drill rod of the impact-rotating drill bit are respectively two layers of springs with different elastic moduli stacked on top and bottom: The buffer device, located at the upper end of the drill rod of the impact-rotating drill bit, has an upper layer comprising a steel wire support spring with a small elastic modulus and a lower layer comprising a first annular spring with a large elastic modulus. The steel wire support spring abuts against the drill rod step above it, and the first annular spring is connected to a support seat on the upper housing of the guide frame via a thrust bearing. The buffer device is placed at the lower end of the drill rod of the impact-rotating drill bit. The upper layer is a second annular spring with a large elastic modulus, and the lower layer is a steel wire positioning spring with a small elastic modulus. The second annular spring is connected to the lower box of the guide frame through a bidirectional thrust ball bearing, and the steel wire positioning spring abuts against the drill rod step below it.

2. The impact-rotation deep underground continuous wall slotting machine with one-time wall cleaning and slotting according to claim 1 is characterized in that: A detachable drill rod connector is installed on the top of the impact-rotary drill bit.

3. The impact-rotation deep underground continuous wall slotting machine with one-time wall cleaning and slotting according to claim 2 is characterized in that: The detachable drill rod connecting piece is an impact cap screwed onto the top of the drill rod.

4. The impact-rotation deep underground continuous wall slotting machine with one-time wall cleaning and slotting according to claim 1 is characterized in that: The horizontal milling roller is cylindrical or spindle-shaped.

5. The impact-rotation deep underground continuous wall slotting machine with one-time wall cleaning and slotting according to claim 4 is characterized in that: The power transfer case is connected to the output shaft of the hydraulic motor through a spur gear, the spur gear is connected to the impact-rotation drill rod through a spline, and the lower end of the spur gear is supported on the lower box body through a bidirectional thrust ball bearing.

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