Joint cutting fracturing device assembly

Abstract

The embodiment of the utility model discloses a joint-cutting fracturing device assembly, relates to the technical field of rock blasting, and can effectively improve the positioning precision of a joint-cutting fracturing device during construction and installation. The assembly comprises a joint-cutting fracturing device, an identifier, a lifting rope and a distance-measuring illumination instrument, the kerf fracturing device is provided with a tubular structure, and a kerf is formed in the pipe wall of the tubular structure. The mark is used for being arranged at the first end of the joint cutting fracturing device; the lifting rope is used for being connected with the joint-cutting fracturing device so as to lift the joint-cutting fracturing device into a blast hole; the distance measuring illuminator is used for measuring the distance of the joint cutting fracturing device and can provide illumination. The method is suitable for the slope boundary presplitting blasting scene of the surface mine.

Description

Technical Field

[0001] This application relates to the field of rock blasting technology, specifically to a slit-cutting fracturing device assembly. Background Technology

[0002] Carbon dioxide phase change fracturing technology, as a non-chemical explosive rock breaking method, has higher controllability and environmental compatibility, with less impact on the surrounding environment from vibration, flyrock, pollution and noise. It shows application potential in environmentally sensitive areas. In particular, the one-time cutting carbon dioxide fracturing device has shown significant advantages in the pre-fracture application of slopes near the boundary in open-pit mines, including low blasting vibration, easy formation of through pre-cracks, and effective control of slope safety and stability.

[0003] Currently, in open-pit mines, during the process of lowering slotting fracturing devices, such as disposable slotting carbon dioxide fracturing devices, to a predetermined position within the blast hole, it is impossible to accurately control the orientation and position of the slotting fracturing device. This may prevent the formation of a complete, continuous fracture during carbon dioxide pre-splitting blasting, resulting in energy loss of the leaking gas within the rock mass. Therefore, accurately controlling the position and orientation of the slotting fracturing device in open-pit bench deep-hole pre-splitting blasting has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, this application provides a slit-cutting cracking device assembly, which can effectively improve the positioning accuracy of the slit-cutting cracking device during construction and installation.

[0005] This application provides a slit-cutting fracturing device assembly, comprising: a slit-cutting fracturing device having a tubular structure, wherein a slit is formed in the wall of the tubular structure; a marker for being disposed at a first end of the slit-cutting fracturing device; a lifting rope for connecting the slit-cutting fracturing device to lower the slit-cutting fracturing device into a borehole; and a rangefinder illuminator for measuring the distance to the slit-cutting fracturing device and providing illumination.

[0006] In one specific implementation, a lifting ring is also included for connecting the lifting rope; the first end of the kerfing device is provided with at least two screw holes symmetrically about an axis, the screw holes being used to install the lifting ring.

[0007] In one specific implementation, the vertical plane along the length direction of the mark has a predetermined angle with the vertical plane along the length direction of the cut.

[0008] In one specific implementation, the marker is provided with a reflective layer for reflecting the illumination light from the rangefinder, and the length of the reflective layer is greater than the width of the reflective layer.

[0009] In one specific implementation, the identifier is provided with a self-illuminating element, and the length of the light-emitting portion of the self-illuminating element is greater than the width of the light-emitting portion of the self-illuminating element.

[0010] In one specific implementation, the length of the suspension rope is not less than the shortest length l, wherein, H is the depth of the borehole, h is the length of the slotting fracturing device, and N is the length of the hoisting rope required for the operator to operate; and / or,

[0011] The diameter of the suspension rope is not less than the minimum diameter d, where, T is the tension in the suspension rope when it is lowering the slit-cutting device, D is the linear density of the suspension rope, R is the tensile strength of the suspension rope, and π is pi.

[0012] In one specific embodiment, the slit-cutting fracturing device includes a filling head, a sealing gasket, an activating agent, and a tube body; the filling head has an inflation port and terminals at both ends; the tube body has the slit cut in its wall, and the filling head is detachably connected to one end of the tube body; the activating agent is disposed within the tube body, and one end of the activating agent has a terminal, which is connected to a terminal of the filling head near the end of the tube body; the sealing gasket is disposed between the filling head and the tube body.

[0013] In one specific implementation, the outer diameter of the tube is larger than the outer diameter of the filling head, and at least two screw holes are provided symmetrically around the axis at one end of the tube connected to the filling head. The screw holes are used to install lifting rings, wherein the inner diameter of the screw holes is less than half the difference between the outer diameter of the tube and the outer diameter of the filling head.

[0014] In one specific implementation, the ranging illuminator includes a parallel-arranged illumination device and an infrared laser ranging device, each with an independent switch.

[0015] The slit-cutting fracturing device assembly provided in this application includes: a slit-cutting fracturing device, a marker, a lifting rope, and a rangefinder illumination device. The slit-cutting fracturing device has a tubular structure with slits cut into its wall. The marker is used to be placed at the first end of the slit-cutting fracturing device. The lifting rope is used to connect the slit-cutting fracturing device to the borehole for hoisting it in. The rangefinder illumination device is used to measure the distance to the slit-cutting fracturing device and provides illumination. This slit-cutting fracturing device assembly can effectively improve the positioning accuracy of the slit-cutting fracturing device during construction and installation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a kerfing device assembly provided in an embodiment of this application;

[0018] Figure 2 A partial schematic diagram of the kerfing device assembly provided in an embodiment of this application;

[0019] Figure 3 A flowchart illustrating a positioning method using a kerf breaker assembly, provided as an embodiment of this application.

[0020] Explanation of key figure labels:

[0021] 1-Cut and crack-inducing device; 2-Cut; 3-Marker; 4-Lifting ring; 5-Lifting rope; 6-Lighting device; 7-Infrared laser rangefinder; 8-Range-measuring and lighting instrument. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0024] Currently, during the process of lowering the slotting fracturing device into the pre-set position within the blast hole in open-pit mines, the orientation and position of the slotting fracturing device cannot be accurately controlled. This may prevent the formation of a complete, continuous fracture during carbon dioxide pre-splitting blasting, resulting in energy loss of the leaking gas within the rock mass. To address these issues, firstly, such as... Figure 1 As shown, an embodiment of this application provides a kerfing device assembly, which may include a kerfing device 1, a marker 3, a suspension rope 5, and a rangefinder illuminator 8.

[0025] The slotted fracturing device 1 has a tubular structure with slots 2 formed in the tube wall. The slots 2 in the tube wall guide the explosive energy within the device, allowing for precise control of the blasting effect. The slots 2 can be formed along a predetermined direction on the tube wall and can have a predetermined length, shape, position, or depth. The slots 2 can communicate with the inner cavity of the tubular structure. Specifically, the predetermined direction of the slots 2 can be set according to the blasting requirements, enabling them to guide the explosive energy and form directional cracks around the borehole along the direction of the slots 2. For example, in this embodiment, the predetermined direction of the slots 2 is parallel to the axial direction of the tubular structure. The number of slots 2 can be one or more. Similarly, the predetermined length of the slots 2, the number of slots 2, and the distribution of multiple slots 2 on the tube wall of the tubular structure can also be set according to specific blasting requirements.

[0026] The slotting fracturing device 1 can be a widely used slotting fracturing device in current engineering applications. For example, the fracturing material installed in the slotting fracturing device 1 can be explosive or carbon dioxide, etc. In this case, the slotting fracturing device 1 is a carbon dioxide slotting fracturing device. As a non-chemical explosive rock breaking method, carbon dioxide phase change fracturing technology has higher controllability and environmental compatibility compared with traditional explosive blasting, and has less impact on the surrounding environment in terms of vibration, flying rocks, pollution and noise.

[0027] Marker 3 is used to be installed at the first end of the slotted rock fracture device 1. Marker 3 indicates the angular position of the slotted rock fracture device 1 when it is lowered into the borehole, ensuring that the cut 2 of the device faces a predetermined direction. This allows the cut 2 to guide the blasting energy, achieving precise blasting of the rock mass. Marker 3 can be made of easily identifiable materials such as reflective or self-luminous substances, enabling it to be identified by construction personnel in the dimly lit environment inside the borehole. Figure 2 As shown, the mark 3 can be installed on the first end of the slit fracture device 1 by means of adhesive or fastener connection. The first end of the slit fracture device 1 is the end facing the blast hole opening, that is, the end facing the construction personnel, so as to facilitate the construction personnel to observe and identify it. The second end of the slit fracture device 1 is the end facing away from the blast hole opening.

[0028] The lifting rope 5 is used to connect the kerf-cutting device 1 to the borehole for lowering it into the borehole. The lifting rope 5 can be made of a soft material, such as nylon rope or steel wire rope, providing high flexibility for adjustment within the confined space of the borehole. The lifting rope 5 not only lowers the kerf-cutting device 1 into the borehole but also allows for rotation of the device to orient the kerf-cutting device 1 so that the kerf 2 faces a predetermined direction. The lifting rope 5 can be attached to the first end of the kerf-cutting device 1; for example, a hook or loop can be provided on the device to facilitate the attachment of the lifting rope 5.

[0029] The rangefinder illuminator 8 is used to measure the distance to the slotted fracture initiator 1, and it also provides illumination. The illumination function of the rangefinder illuminator 8 facilitates observation of the direction indicated by the marker 3, thereby making it easier to adjust the angle and position of the slotted fracture initiator 1. Especially when the marker 3 is made of reflective material, the illumination light emitted by the rangefinder illuminator 8 is more easily identified after reflection from the marker 3. The rangefinder illuminator 8's rangefinder function also facilitates monitoring the actual distance to the slotted fracture initiator 1 when it is lowered to the preset position of the blast hole, thereby precisely controlling the installation position of the slotted fracture initiator 1 and improving blasting accuracy.

[0030] The slit-cutting fracturing device assembly provided in this application includes a slit-cutting fracturing device 1, a marker 3, a lifting rope 5, and a rangefinder 8. The slit-cutting fracturing device 1 has a tubular structure, and a slit 2 is formed in the wall of the tubular structure. The marker 3 is used to be placed at the first end of the slit-cutting fracturing device 1. The lifting rope 5 is used to connect the slit-cutting fracturing device 1 to lower it into the borehole. The rangefinder 8 is used to measure the distance of the slit-cutting fracturing device 1 and can provide illumination. This slit-cutting fracturing device assembly can effectively improve the positioning accuracy of the slit-cutting fracturing device 1 during construction and installation.

[0031] Optionally, in one embodiment of this application, the kerfing device assembly further includes a lifting ring 4 for connecting a lifting rope 5; the first end of the kerfing device 1 is symmetrically provided with at least two threaded holes around its axis for installing the lifting ring 4. For example, the first end of the kerfing device 1 may be symmetrically provided with two threaded holes around its axis to install the lifting ring 4. The lifting ring 4 has a screw structure and an annular structure. The screw structure has an external thread adapted to the internal thread of the screw hole. The thread mating length and thread diameter specifications of the two can be adaptively designed according to the stress conditions; the annular structure of the lifting ring 4 is used to thread the lifting rope 5 through. It can be understood that by symmetrically providing two threaded holes to install the lifting ring 4, the lifting rope 5, after passing through the lifting ring 4, can easily generate a rotational torque to adjust the angular position of the kerfing device 1.

[0032] Optionally, in one embodiment of this application, the vertical plane along the length direction of the marker 3 has a preset angle with the vertical plane along the length direction of the cut 2. This preset angle can be any angle; for example, to facilitate observation and judgment by construction personnel, the preset angle can be 0 degrees or 180 degrees. That is, the length direction of the marker 3 is consistent with or flush with the length direction of the cut 2. Thus, when construction personnel lower the cutter breaker 1 into the blast hole, observing the orientation of the marker 3 is equivalent to observing the orientation of the cut 2, thereby improving the usability of the component and increasing construction efficiency.

[0033] Optionally, in one embodiment of this application, the mark 3 is provided with a reflective layer for reflecting the illumination light from the rangefinder illuminator 8, and the length of the reflective layer is greater than the width of the reflective layer. It is understood that the greater length of the reflective layer facilitates the indicating effect of the mark 3; for example, the reflective layer can be a rectangular, arrow-shaped, or other directional shape. The mark 3 can specifically be made of reflective stickers, etc. The material of the reflective sticker should preferably be compatible with the metal material of the kerf cutter 1, and the retroreflection coefficient should preferably be greater than 140 cd / lx / m².

[0034] Optionally, in one embodiment of this application, the identifier 3 is provided with a self-emissive element, and the length of the light-emitting portion of the self-emissive element is greater than the width of the light-emitting portion. The use of a self-emissive element in the identifier 3 further improves the applicability of the component. For example, in environments where strong lighting is inconvenient, or when the lighting device 6 of the rangefinder illuminator 8 malfunctions, the self-emissive element of the identifier 3 can ensure that construction can continue. Specifically, the self-emissive element of the identifier 3 can be a light-emitting lamp or a fluorescent component, etc.

[0035] To ensure the smooth progress of the construction process and avoid safety accidents, optionally, in one embodiment of this application, the length of the suspension rope 5 is not less than the shortest length l, wherein... H is the depth of the borehole, h is the length of the slit-cutting fracturing device 1, and N is the length of the hoisting rope 5 required for the construction personnel, which is usually selected as 4m; and / or,

[0036] The diameter of the suspension rope 5 is not less than the minimum diameter d, where, T is the tension of the suspension rope 5 when it is lowered to the slit-cutting device 1, D is the linear density of the suspension rope 5, R is the tensile strength of the suspension rope 5, and π is pi.

[0037] Optionally, in one embodiment of this application, the slit fracturing device 1 includes a filling head, a sealing gasket, an activating agent, and a tube body; the filling head has an inflation port and terminals at both ends; a slit 2 is formed in the tube wall of the tube body, and the filling head is detachably connected to one end of the tube body; the activating agent is disposed in the tube body, and one end of the activating agent has a terminal, which is connected to the terminal of the filling head near the end of the tube body; the sealing gasket is disposed between the filling head and the tube body. Specifically, the slit fracturing device 1 can be a disposable carbon dioxide slit fracturing device. When assembling the slit fracturing device 1, the terminal inside the filling head is connected to the terminal of the activating agent. Additionally, a sealing gasket is placed at the threaded opening of the tube body of the slit fracturing device 1. The activating agent is passed through the sealing gasket and the filling head is tightened, completing the sealing operation of the filling head, the activating agent, and the tube body; the disposable slit fracturing tube 2 can be inflated using a carbon dioxide filling device.

[0038] Optionally, in one embodiment of this application, the outer diameter of the tube is larger than the outer diameter of the filling head. At least two threaded holes are symmetrically arranged around the axis at the end of the tube connected to the filling head. These threaded holes are used to install the lifting ring 4. The inner diameter of the threaded holes is less than half the difference between the outer diameter of the tube and the outer diameter of the filling head. Specifically, the outer diameter of the annular structure at the top of the lifting ring 4 should preferably not exceed 5 cm; the inner diameter of the annular structure of the lifting ring 4 should be larger than the outer diameter of the lifting rope 5. The inner diameter of the threaded holes is less than half the difference between the outer diameter of the tube and the outer diameter of the filling head, thereby ensuring that the threaded holes are easy to process and have good load-bearing performance.

[0039] Optionally, in one embodiment of this application, the rangefinder illuminator 8 includes a parallel-arranged illumination device 6 and an infrared laser rangefinder 7, each with an independent switch. The illumination device 6 should have an intensity greater than 2000 lumens to provide sufficient illumination. Both the illumination device 6 and the infrared laser rangefinder 7 are positioned at the front end of the rangefinder illuminator 8 and are less than 5 cm apart, facilitating use in engineering scenarios involving boreholes within 100 mm. The maximum distance measured by the infrared laser rangefinder 7 should be greater than 25 meters, with a ranging error within ±0.1 m. The infrared laser rangefinder 7 has a distance display screen. Furthermore, the rangefinder illuminator 8 can employ a replaceable power supply design.

[0040] Secondly, such as Figure 3 As shown, embodiments of this application provide a positioning method using any of the described kerf breaker components, the positioning method comprising:

[0041] S1. Assemble the kerf-cutting device 1.

[0042] Specifically, according to the usage requirements, the components of the slit fracturing device 1, such as a disposable carbon dioxide slit fracturing device, can be assembled. For example, the inner terminal of the filling head can be connected to the terminal of the activating agent. In addition, a sealing gasket can be placed at the threaded opening of the tube of the slit fracturing device 1. The activating agent can be passed through the sealing gasket and the filling head can be tightened to complete the sealed installation of the filling head, activating agent, and tube. Then, the overall resistance of the filling head and activating agent can be detected through the two terminals on the outside of the filling head to confirm whether there is a circuit.

[0043] S2. Place the mark 3 at the first end of the kerf breaker 1.

[0044] The marking 3 can be made of reflective stickers. The reflective stickers are cut into rectangular strips that are 2cm wide and 20cm long. Based on the assembled slit breaker 1, the reflective stickers are extended radially outward from the center of the filling head end. The application direction can be along the set direction of the slit 2 of the slit breaker 1.

[0045] After the mark 3 is set at the first end of the kerf 1, if the kerf 1 is provided with a screw hole for connecting the lifting ring 4, the lifting ring 4 can be further installed in the screw hole. For example, the lifting ring 4 can be installed in the two screw holes of the kerf 1 respectively, and the annular surface of the ring structure of the two lifting rings 4 can be perpendicular to the end face of the filling head, so as to ensure that the angle position of the kerf 1 in the blast hole can be effectively rotated and adjusted during construction operations.

[0046] S3. Inject the cracking substance into the slit cracking device 1.

[0047] For the slit fracturing device 1, such as a disposable carbon dioxide slit fracturing device, the disposable slit fracturing tube 2 can be filled with fracturing material by a carbon dioxide filling device. The disposable carbon dioxide slit fracturing device is widely used in the industry and will not be described in detail in this application. After the filling process is completed, the overall resistance of the fracturing tube system should be tested by the external circuit of the slit fracturing device 1. After confirming the circuit, the circuit should be short-circuited to ensure the safety of the transportation process.

[0048] S4. Connect the suspension rope 5 to the kerf-cutting device 1.

[0049] After transporting the ready-to-explode slit fracturing device 1, such as a disposable carbon dioxide slit fracturing device, to the blasting site, select an initiation wire of appropriate borehole length and connect it to the external post of the filling head. Select a suitable length of hoisting rope 5 and pass one end of the hoisting rope 5 through two lifting rings 4 in sequence to connect the hoisting rope 5 to the disposable carbon dioxide slit fracturing device. At this time, it should still be ensured that the annular surface of the ring structure of the two lifting rings 4 is perpendicular to the end face of the filling head. Then, the disposable carbon dioxide slit fracturing device is lowered into the borehole through the hoisting rope 5.

[0050] S5. Lower the slit-cutting fracturing device 1 into the borehole, illuminate it with the rangefinder 8, and rotate the slit-cutting fracturing device 1 to the preset direction according to the direction of the marker 3; and use the rangefinder 8 to measure the distance and lower the slit-cutting fracturing device 1 to the preset position of the borehole.

[0051] During the lowering process of the cutting cracking device 1, the lighting device 6 of the rangefinder illuminator 8 can be turned on to illuminate the blast hole and locate the position and direction of the marker 3, i.e. the reflective sticker. Based on the direction shown by the reflective sticker, the construction personnel and equipment are directed to adjust the position of the hoisting rope 5 located outside the blast hole to achieve the purpose of rotating the angle position of the cutting cracking device 1, so that the direction shown by the reflective sticker, i.e. the cutting 2 of the cutting cracking device 1, is oriented towards the preset direction.

[0052] After adjusting the direction of the slit 2, the infrared laser rangefinder 7 of the rangefinder 8 is activated. This infrared laser rangefinder 7 utilizes the high-precision measurement capability of infrared lasers to determine the accurate position of the slit fracture initiator 1 within the borehole. This process needs to continue until the slit fracture initiator 1 is completely lowered to the preset position within the borehole. When the slit fracture initiator 1 reaches the preset position within the borehole, the positioning operation of the slit fracture initiator 1 within the borehole can be considered complete. At this point, the pre-blasting process for the slit fracture initiator 1 is ready, and the next step of the fracture initiation operation can proceed.

[0053] Then, the blasting network can be assembled and its functions tested to ensure preparations are complete. A blasting warning is issued, and the slotting fracturing device 1 is detonated. To improve blasting effectiveness, it is essential to ensure that the cutting direction 2 of each slotting fracturing device 1 is consistent; this precise control is crucial for achieving effective rock fracturing and environmental safety.

[0054] The positioning method provided in this application uses a slotted fracturing device assembly, including a slotted fracturing device 1, a marker 3, a lifting rope 5, and a rangefinder 8. The slotted fracturing device 1 has a tubular structure with slots 2 cut into its wall. The marker 3 is placed at the first end of the slotted fracturing device 1. The lifting rope 5 is used to connect the slotted fracturing device 1 to lower it into the borehole. The rangefinder 8 is used to measure the distance to the slotted fracturing device 1 and provides illumination. This positioning method can effectively improve the positioning accuracy of the slotted fracturing device 1 during construction and installation.

[0055] This positioning method accurately controls the cutting direction of the slot 2 of the slotted rock fracturer 1, ensuring that the pressure release direction of the slotted rock fracturer remains consistent. In boundary pre-fracture applications, it can form well-formed through-cracks between the blasting zone and the reserved zone, ensuring a smooth slope surface with good integrity, reducing the damage to the reserved rock mass caused by the main blast hole blast, and effectively ensuring slope stability and safe mining. Furthermore, the slotted rock fracturer assembly facilitates the measurement of the depth and position of the slotted rock fracturer 1 within the blast hole, ensuring that on-site construction is consistent with the blasting design, achieving the design concept of precise blasting, and completing the expected blasting effect. This helps improve the rock-breaking capability of the slotted rock fracturer 1, especially the disposable carbon dioxide slotted rock fracturer, in open-pit mines and various application scenarios.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The embodiments of this application have been described in detail above. Those skilled in the art can design and modify the device and its usage within the scope of this application according to the on-site construction conditions.

[0058] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A kerf initiator assembly, characterized in that, include: A slotted fracturing device, wherein the slotted fracturing device has a tubular structure and a slot is formed on the wall of the tubular structure; A marker, the marker being used to be affixed to the first end of the kerf maker; A hoisting rope is used to connect the slotting fracturing device to hoist the slotting fracturing device into the borehole; A distance measuring illuminator is used to measure the distance of the kerf cracking device, and the distance measuring illuminator is capable of providing illumination.

2. The kerf initiator assembly according to claim 1, characterized in that, It also includes a lifting ring for connecting the lifting rope; the first end of the kerfing device is provided with at least two screw holes symmetrically around its axis, the screw holes for installing the lifting ring.

3. The slotting fracturing device assembly according to claim 1, characterized in that, The vertical plane along the length direction of the mark has a predetermined angle with the vertical plane along the length direction of the cut.

4. The kerf initiator assembly according to claim 1, characterized in that, The marker is provided with a reflective layer for reflecting the illumination light from the rangefinder, and the length of the reflective layer is greater than the width of the reflective layer.

5. The kerf initiator assembly according to claim 1, characterized in that, The sign is provided with a self-illuminating element, and the length of the luminous part of the self-illuminating element is greater than the width of the luminous part of the self-illuminating element.

6. The kerf initiator assembly according to claim 1, characterized in that, The length of the suspension rope shall not be less than the shortest length. l ,in, ; H The depth of the borehole. h The length of the slit-cutting fracturing device. N The required length of the hoisting rope for the construction workers to operate; and / or, The diameter of the suspension rope shall not be less than the minimum diameter. d ,in, ; T This refers to the tension in the suspension rope when it lowers the slit-cutting and crack-inducing device. D The linear density of the suspension rope. R The tensile strength of the suspension rope. π Pi is the mathematical constant of a circle.

7. The kerfing device assembly according to claim 1, characterized in that, The slit-cutting device includes a filling head, a sealing gasket, an activating agent, and a tube; The filling head is provided with an air inlet, and both ends of the filling head are provided with terminals; the tube wall is provided with the slit, and the filling head is detachably connected to one end of the tube body; the activating agent is disposed in the tube body, and one end of the activating agent is provided with a terminal, which is connected to the terminal of the filling head near the end of the tube body; the sealing gasket is disposed between the filling head and the tube body.

8. The slotting fracturing device assembly according to claim 7, characterized in that, The outer diameter of the tube is larger than the outer diameter of the filling head. At least two screw holes are provided symmetrically around the axis at one end of the tube connected to the filling head. The screw holes are used to install lifting rings. The inner diameter of the screw holes is less than half the difference between the outer diameter of the tube and the outer diameter of the filling head.

9. The kerf initiator assembly according to claim 1, characterized in that, The ranging illumination device includes a parallel illumination device and an infrared laser ranging device, each with its own independent switch.

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