Fabricated shaped charge blasting device

Abstract

The utility model provides an assembly type shaped charge blasting device, and belongs to the field of geotechnical engineering blasting, the assembly type shaped charge blasting device comprises a sleeve and a plurality of support rings arranged in the sleeve at intervals; the sleeve and the supporting ring are coaxially arranged; the casing pipe comprises an upper half-wall casing pipe and a lower half-wall casing pipe which are connected in a clamping manner, the supporting ring comprises an upper half supporting ring arranged in the upper half-wall casing pipe and a lower half supporting ring arranged in the lower half-wall casing pipe, and the upper half supporting ring and the lower half supporting ring are correspondingly arranged; an energy gathering groove is formed in the sleeve; a detonating cord clamping groove is formed in the supporting ring. By arranging the supporting ring, the explosive cartridge is firmly fixed to the center of the sleeve, so that the explosive cartridge is located in the center of a blast hole, the half-hole rate in the smooth blasting process is increased, damage to surrounding rock and blasting disturbance in the blasting process are reduced, and axial discontinuity of explosive cartridge charging can be achieved; by arranging the energy gathering groove, energy generated by explosion of the explosive cartridge is efficiently transmitted to the blast hole, and efficient blasting of the blast hole is achieved.

Description

Technical Field

[0001] This application relates to the field of blasting technology in geotechnical engineering, specifically to a prefabricated shaped charge blasting device. Background Technology

[0002] Blasting is a common method used in geotechnical engineering construction to break up rock. During blasting operations, to minimize damage to the rock mass in the preservation area, pre-splitting blasting or smooth blasting is often employed. Smooth blasting, in particular, is widely used due to its simplicity.

[0003] Smooth blasting often employs radially decoupled, axially discontinuous charging methods, as well as simultaneous detonation of adjacent smooth blast holes. To improve the efficiency of smooth blasting, shaped charge explosive devices are frequently used to increase the half-hole ratio. However, conventional shaped charge explosive devices cannot ensure that the explosive is centered in the borehole during construction, causing the explosive cartridge to deviate from the borehole center to some extent. This results in problems such as low half-hole ratio, significant damage to the surrounding rock, and strong blasting disturbance during smooth blasting. Summary of the Invention

[0004] In view of the technical problems existing in the background art, this application provides a prefabricated shaped charge blasting device, which has a simple structure, can achieve precise positioning of explosive cartridges, and has a good blasting effect.

[0005] This application provides a prefabricated shaped charge blasting device, including a sleeve and a plurality of support rings spaced apart inside the sleeve; the sleeve and the support rings are coaxially arranged; the sleeve includes an upper half sleeve and a lower half sleeve that are engaged and connected, and the support rings include an upper half support ring disposed in the upper half sleeve and a lower half support ring disposed in the lower half sleeve, the upper half support ring and the lower half support ring being correspondingly arranged; the sleeve is provided with a shaped charge groove; and the support rings are provided with a detonating cord slot.

[0006] In the technical solution of this application embodiment, by setting multiple spaced support rings coaxial with the casing inside the casing, the explosive cartridge is firmly fixed at the center of the casing, thereby placing the explosive cartridge at the center of the borehole. This increases the half-hole ratio during smooth blasting and reduces damage to the surrounding rock and blasting disturbance during the blasting process. It also achieves axial discontinuity in the explosive cartridge loading. By setting a shaped charge groove, the energy generated by the explosive cartridge explosion is efficiently transferred to the borehole, achieving efficient blasting of the borehole.

[0007] In some embodiments, the spacing between adjacent support rings is less than the length of the explosive cartridge, and the inner diameter of the support ring is 5-10 mm smaller than the diameter of the explosive cartridge.

[0008] In the technical solution of this application embodiment, by reasonably setting the spacing between adjacent support rings, it is ensured that the same explosive cartridge is in contact with at least one support ring, thereby positioning the explosive cartridge at the center of the sleeve; by reasonably setting the inner diameter of the support ring to be slightly smaller than the diameter of the explosive cartridge, the contact tightness between the support ring and the explosive cartridge is increased, so that the explosive cartridge is firmly fixed in the sleeve.

[0009] In some embodiments, the energy-concentrating groove includes a V-shaped upper energy-concentrating groove disposed on the upper half-wall sleeve and a V-shaped lower energy-concentrating groove disposed on the lower half-wall sleeve, wherein the V-shaped upper energy-concentrating groove and the V-shaped lower energy-concentrating groove are symmetrically disposed on the sleeve.

[0010] In the technical solution of this application embodiment, by setting the energy-concentrating groove into a V-shaped structure, the energy utilization rate and shaping effect of the explosive explosion are improved, and damage to other directions is reduced.

[0011] In some embodiments, the width of the detonating cord slot is equal to the diameter of the detonating cord, and the depth of the detonating cord slot is 1.5-2 mm less than the diameter of the detonating cord.

[0012] In the technical solution of this application embodiment, by reasonably setting the size of the detonating cord slot, the detonating cord is smoothly and stably laid in the detonating cord slot, and the detonating cord is in close contact with the explosive cartridge.

[0013] In some embodiments, the detonating cord slot is disposed on the lower half of the support ring.

[0014] In the technical solution of this application embodiment, by setting the detonating cord slot on the lower half support ring, the lower half support ring can support the detonating cord when it is installed.

[0015] In some embodiments, the outer diameter of the casing is equal to the diameter of the borehole.

[0016] In the technical solution of this application embodiment, by reasonably setting the outer diameter of the sleeve, the assembled shaped charge blasting device is tightly fixed in the blast hole, and the explosive cartridge is placed in the center of the blast hole, thereby improving the blasting effect.

[0017] In some embodiments, the angle between the apex angles of the upper V-shaped energy concentrator and the lower V-shaped energy concentrator is 50°-70°; the width of the upper V-shaped energy concentrator and the lower V-shaped energy concentrator is 12-18mm.

[0018] In the technical solution of this application embodiment, a better energy-concentrating blasting effect is achieved by reasonably controlling the size of the V-shaped structure.

[0019] In some embodiments, a locking assembly is provided between the upper half-wall sleeve and the lower half-wall sleeve. The locking assembly includes a locking part and a locking groove, wherein the protruding part of the locking part and the groove part of the locking groove are adapted to each other.

[0020] In the technical solution of this application embodiment, by setting a locking component, the upper half sleeve and the lower half sleeve are firmly locked together by the mutual cooperation of the protruding part of the locking part and the groove part of the locking groove, thereby ensuring the stable installation of the explosive cartridge and the detonating cord.

[0021] In some embodiments, the locking part and the locking groove are respectively disposed at both ends of the upper half-wall sleeve and the lower half-wall sleeve along the arc direction;

[0022] Alternatively, the locking part is provided at both ends of the upper half-wall sleeve along the arc direction; the locking groove is provided at both ends of the lower half-wall sleeve along the arc direction.

[0023] In the technical solution of this application embodiment, by setting various forms of locking parts and slot positional relationships, the upper half sleeve and the lower half sleeve are firmly locked together while meeting different production needs.

[0024] In some embodiments, the sleeve and the support ring are made of PVC.

[0025] In the technical solution of this application embodiment, PVC material does not affect the condensed explosive effect, and the material is simple, readily available, lightweight, and low in cost.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0028] Figure 1 This is a front view of the assembled shaped charge blasting device in the embodiments of this application;

[0029] Figure 2 This is a front view of the lower half of the sleeve and the lower half of the support ring in the embodiments of this application;

[0030] Figure 3 For this application Figure 1A split diagram of A in the middle;

[0031] Figure 4 This is a top view of the assembled shaped charge blasting device in the embodiments of this application;

[0032] Explanation of reference numerals in the attached drawings: 100-Assembled shaped charge blasting device; 1-Sleeve; 2-Support ring; 3-Shaped charge groove; 4-Detonating cord slot; 5-Clamping assembly; 11-Upper half-wall sleeve; 12-Lower half-wall sleeve; 21-Upper half-support ring; 22-Lower half-support ring; 31-V-shaped upper shaped charge groove; 32-V-shaped lower shaped charge groove; 51-Clamping part; 52-Slot. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "length", "width", "thickness", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] In smooth blasting, shaped charge blasting devices are often used to increase the half-hole ratio. However, commonly used shaped charge blasting devices cannot ensure that the explosive is centered in the borehole during construction, resulting in problems such as low half-hole ratio, large damage to the surrounding rock, and strong blasting disturbance during smooth blasting.

[0039] To address the technical problems of low half-hole ratio, significant damage to surrounding rock, and strong blasting disturbance during smooth blasting caused by the explosive cartridge deviating from the borehole center, this application provides a prefabricated shaped charge blasting device. This device utilizes multiple spaced support rings coaxial with the casing to firmly fix the explosive cartridge at the center of the casing. When the casing is placed in the borehole, the explosive cartridge is positioned at the center, effectively preventing it from deviating from the borehole center. This improves the half-hole ratio during smooth blasting, reduces damage to surrounding rock and blasting disturbance, and also ensures axial discontinuity in the explosive cartridge loading. Furthermore, by incorporating a shaped charge groove, the energy generated by the explosive cartridge explosion is efficiently transferred to the borehole through its focusing effect, achieving efficient blasting of the borehole.

[0040] Please refer to Figure 1The present invention provides a prefabricated shaped charge blasting device 100, comprising a sleeve 1 and a plurality of support rings 2 spaced apart inside the sleeve 1, the sleeve 1 and the support rings 2 being coaxially arranged; the sleeve 1 includes an upper half-wall sleeve 11 and a lower half-wall sleeve 12 that are engaged and connected, the support rings 2 include an upper half-support ring 21 disposed in the upper half-wall sleeve 11 and a lower half-support ring 22 disposed in the lower half-wall sleeve 12, the upper half-support ring 21 and the lower half-support ring 22 being correspondingly arranged; the sleeve 1 is provided with a shaped charge groove 3, and the support rings 2 are provided with a detonating cord groove 4. Specifically, the upper half-wall sleeve 11, the lower half-wall sleeve 12, the upper half-support ring 21, and the lower half-support ring 22 are all semi-cylindrical shell structures; the upper half-support ring 21 and the upper half-wall sleeve 11 can be integrally formed, or the upper half-support ring 21 can be fixed in the upper half-wall sleeve 11 by a fixing device; similarly, the lower half-support ring 22 and the lower half-wall sleeve 12 can be integrally formed, or the lower half-support ring 22 can be fixed in the lower half-wall sleeve 12 by a fixing device. When blasting operations are required, the detonating cord is first placed in the detonating cord slot 4. Then, the explosive cartridge conforming to the design specifications is placed in the lower half support ring 22 of the lower half sleeve 12. Next, the upper half sleeve 11 is engaged with the lower half sleeve 12. At this time, the upper half support ring 21 and the lower half support ring 22, which are set up to be corresponding to each other, are spliced ​​together to form a complete support ring 2. The explosive cartridge is fixed in the center of the sleeve 1 through the support ring 2, and the detonating cord is in contact with the explosive cartridge. After the installation is completed, the sleeve 1 is placed in the pre-constructed blast hole for blasting operations.

[0041] In the technical solution of this application embodiment, by setting a plurality of support rings 2 at intervals inside the sleeve 1, and ensuring that the sleeve 1 and the support rings 2 are coaxially arranged, the explosive cartridge is firmly fixed to the center of the sleeve 1 by the support rings 2. When the sleeve 1 is placed in the borehole, the explosive cartridge is located at the center of the borehole, effectively preventing the explosive cartridge from deviating from the center of the borehole, thereby improving the half-hole ratio in the smooth blasting process, and reducing the damage to the surrounding rock and blasting disturbance during the blasting process; the support rings 2 can also realize the axial discontinuity of the explosive cartridge loading. By setting the sleeve 1 into two parts, the upper half sleeve 11 and the lower half sleeve 12, which are connected by a snap-fit, and the support ring 2 into two parts, the upper half support ring 21 and the lower half support ring 22, the assembled structure facilitates the efficient and rapid installation of the explosive cartridge into the support ring 2. By setting the energy-concentrating groove 3, the energy generated by the explosion of the explosive cartridge is efficiently transferred to the borehole through the energy-concentrating effect of the energy-concentrating groove 3, realizing the efficient blasting of the borehole. By setting the detonating cord slot 4, installation space is provided for the detonating cord, and close contact between the detonating cord and the explosive cartridge is facilitated, which is beneficial to the detonation of the explosive cartridge. In addition, the support rings 2 are spaced apart in the sleeve 1, so that there are more air gaps between different explosive cartridges, which prolongs the time of stress wave action in the rock during the blasting process, improves the blasting efficiency, and reduces the over-crushing of the rock around the blast hole during the blasting process.

[0042] Furthermore, in the embodiments of this application, such as Figure 4 As shown, the spacing L1 between adjacent support rings 2 is less than the length of the explosive cartridge, and the inner diameter of the support ring 2 is 5-10 mm smaller than the diameter of the explosive cartridge.

[0043] In the technical solution of this application embodiment, by setting the spacing between adjacent support rings 2 to be less than the length of the explosive cartridge, it can be ensured that the same explosive cartridge is in contact with at least one support ring 2 after the explosive cartridge is installed, thereby positioning the explosive cartridge at the center of the sleeve 1. By setting the inner diameter of the support ring 2 to be slightly smaller than the diameter of the explosive cartridge, the contact tightness between the support ring 2 and the explosive cartridge is increased, so that the support ring 2 firmly fixes the explosive cartridge in the sleeve 1, preventing the position of the explosive cartridge from changing when the assembled shaped charge blasting device 100 is installed into the borehole.

[0044] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the energy-concentrating groove 3 includes a V-shaped upper energy-concentrating groove 31 disposed on the upper half-wall sleeve 11 and a V-shaped lower energy-concentrating groove 32 disposed on the lower half-wall sleeve 12. The V-shaped upper energy-concentrating groove 31 and the V-shaped lower energy-concentrating groove 32 are symmetrically disposed on the sleeve 1. Specifically, the V-shaped upper energy-concentrating groove 31 is disposed at the center of the upper half-wall sleeve 11 along the arc direction, and the V-shaped lower energy-concentrating groove 32 is disposed at the center of the lower half-wall sleeve 12 along the arc direction.

[0045] In the technical solution of this application embodiment, by setting the energy-concentrating groove 3 into a V-shaped upper energy-concentrating groove 31 and a V-shaped lower energy-concentrating groove 32, the V-shaped energy-concentrating groove can concentrate the blasting energy generated by the explosive cartridge in the cutting direction. When installing the assembled energy-concentrating blasting device 100, the energy-concentrating groove 3 is rotated and adjusted to the preset crack direction. After the explosive is detonated, the movement speed of the detonation products at the energy-concentrating groove 3 is the maximum. The expansion effect of the explosive gas causes the rock on the borehole wall to be pulled apart along the direction of the energy-concentrating groove 3, thereby causing the rock mass to be fractured and shaped in the set direction. The energy-concentrating groove 3 makes the explosive energy more concentrated, improves the energy utilization rate and shaping effect of the explosive explosion, and reduces damage to other directions.

[0046] Furthermore, in the embodiments of this application, such as Figure 4 As shown, the width L3 of the detonating cord slot 4 is equal to the diameter of the detonating cord, and the depth of the detonating cord slot 4 is 1.5-2mm smaller than the diameter of the detonating cord.

[0047] In the technical solution of this application embodiment, by setting the width of the detonating cord slot 4 to be equal to the diameter of the detonating cord, the detonating cord can be smoothly installed in the detonating cord slot 4. At the same time, the depth of the detonating cord slot 4 is set to be slightly less than the diameter of the detonating cord. After the explosive cartridge is installed, the explosive cartridge and the detonating cord are squeezed and pressed together to ensure that the detonating cord is stably laid in the detonating cord slot 4, and at the same time, to provide favorable conditions for the detonation of the explosive cartridge.

[0048] Furthermore, in this embodiment, the detonating cord slot 4 is disposed on the lower half support ring 22. When blasting operations are required, the detonating cord is first placed in the detonating cord slot 4, and then the explosive cartridge conforming to the design specifications is placed in the lower half support ring 22 in the lower half sleeve 12, so that the detonating cord and the explosive cartridge are in contact. Then, the upper half sleeve 11 is engaged with the lower half sleeve 12. At this time, the upper half support ring 21 and the lower half support ring 22, which are respectively arranged to form a complete support ring 2, fixes the explosive cartridge in the center of the sleeve 1 through the support ring 2. After installation, the sleeve 1 is placed in the pre-constructed blast hole for blasting operations.

[0049] In the technical solution of this application embodiment, by setting the detonating cord slot 4 on the lower half support ring 22, the lower half support ring 22 can support the detonating cord when it is installed.

[0050] Furthermore, in this embodiment of the application, the outer diameter of the sleeve 1 is equal to the diameter of the borehole.

[0051] In the technical solution of this application embodiment, by setting the outer diameter of the sleeve 1 to be the same as the diameter of the borehole, not only can the assembled shaped charge blasting device 100 be tightly fixed in the borehole, but the explosive cartridge in the center of the sleeve 1 is also placed in the center of the borehole, thereby improving the blasting effect.

[0052] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the angle between the apex angles of the V-shaped upper energy concentrator 31 and the V-shaped lower energy concentrator 32 is 50°-70°; Figure 4 As shown, the width L2 of the V-shaped upper energy concentrator 31 and the V-shaped lower energy concentrator 32 is 12-18mm. Specifically, the width refers to the maximum width of the opening of the V-shaped structure.

[0053] In the technical solution of this application embodiment, by reasonably controlling the opening angle and width of the V-shaped structure, the size of the upper V-shaped energy-concentrating groove 31 and the lower V-shaped energy-concentrating groove 32 are within a preset range, thereby achieving a better energy-concentrating explosion effect.

[0054] Furthermore, in the embodiments of this application, such as Figure 3As shown, a locking assembly 5 is provided between the upper half-wall sleeve 11 and the lower half-wall sleeve 12. The locking assembly includes a locking part 51 and a locking groove 52, and the protruding part of the locking part 51 and the groove part of the locking groove 52 are adapted to each other.

[0055] In the technical solution of this application embodiment, by setting a locking component 5 between the upper half-wall sleeve 11 and the lower half-wall sleeve 12, the upper half-wall sleeve 11 and the lower half-wall sleeve 12 are firmly locked together by the mutual cooperation of the protruding part of the locking part 51 and the groove part of the locking groove 52, thereby ensuring the stable installation of the explosive cartridge and the detonating cord.

[0056] Furthermore, in the embodiments of this application, such as Figure 3 As shown, the locking part 51 and the locking groove 52 are respectively provided at both ends of the upper half-wall sleeve 11 and the lower half-wall sleeve 12 along the arc direction. Specifically, the locking part 51 and the locking groove 52 are respectively provided at both ends of the upper half-wall sleeve 11, and the locking part 51 and the locking groove 52 are respectively provided at both ends of the lower half-wall sleeve 12. During installation, the locking part 51 of the upper half-wall sleeve 11 corresponds to the locking groove 52 of the lower half-wall sleeve 12, and the locking groove 52 of the upper half-wall sleeve 11 corresponds to the locking part 51 of the lower half-wall sleeve 12.

[0057] Alternatively, the locking parts 51 are provided at both ends of the upper half-wall sleeve 11 along the arc direction; the locking grooves 52 are provided at both ends of the lower half-wall sleeve 12 along the arc direction. Specifically, both ends of the upper half-wall sleeve 11 are locking parts 51, and both ends of the lower half-wall sleeve 12 are locking grooves 52. During installation, it is only necessary to align the two ends of the upper half-wall sleeve 11 with the two ends of the lower half-wall sleeve 12.

[0058] In the technical solution of this application embodiment, by setting various forms of the positional relationship between the locking part 51 and the slot 52, different production needs are met while ensuring that the upper half sleeve 11 and the lower half sleeve 12 are firmly locked together.

[0059] Furthermore, in this embodiment, the sleeve 1 and the support ring 2 are made of PVC.

[0060] In the technical solution of this application embodiment, by setting the material of the sleeve 1 and the support ring 2 to PVC, the PVC material is simple, readily available, lightweight and low cost without affecting the energy blasting effect.

[0061] The present application will be described in detail below through specific embodiments.

[0062] This embodiment adopts a radially uncoupled, axially discontinuous charging method with an uncoupling coefficient of 0.7. In the blasting design, the borehole diameter is 42mm, the diameter of the selected explosive cartridge is 30mm, and the diameter of the detonating cord is 6.2mm.

[0063] The spacing L1 between adjacent support rings 2 is less than the length of the explosive cartridge, and the inner diameter of support ring 2 is 20mm; the width L2 of the shaped charge groove 3 is 15mm, and the angle of the apex is 60°; the width L3 of the detonating cord slot 4 is 6.2mm, and the height is 4mm.

[0064] Please refer to the following: Figures 1 to 4 According to one or more embodiments of this application, by setting multiple spaced support rings 2 coaxial with the sleeve 1 inside the sleeve 1, the explosive cartridge is firmly fixed in the center of the sleeve 1, thereby making the explosive cartridge located in the center of the borehole, thereby improving the half-hole ratio in the smooth blasting process, reducing the damage to the surrounding rock and blasting disturbance during the blasting process, and also realizing the axial discontinuity of the explosive cartridge loading; by setting the energy-concentrating groove 3, the energy generated by the explosion of the explosive cartridge is efficiently transferred to the borehole through the energy-concentrating effect of the energy-concentrating groove 3, achieving efficient blasting of the borehole; by setting the sleeve 1 as an upper half-wall sleeve 11 and a lower half-wall sleeve 12 that are interlocked, and setting the support ring 2 as an upper half-support ring 21 and a lower half-support ring 22, the assembled structure facilitates the efficient and rapid installation of the explosive cartridge in the support ring 2.

[0065] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A prefabricated shaped charge blasting device, characterized in that, The device includes a sleeve and several support rings spaced apart inside the sleeve; the sleeve and the support rings are coaxially arranged; the sleeve includes an upper half sleeve and a lower half sleeve that are engaged and connected; the support rings include an upper support ring disposed in the upper half sleeve and a lower support ring disposed in the lower half sleeve, with the upper and lower support rings being correspondingly arranged; the sleeve is provided with a shaped charge groove; and the support rings are provided with a detonating cord slot.

2. The prefabricated shaped charge blasting device according to claim 1, characterized in that, The spacing between adjacent support rings is less than the length of the explosive cartridge, and the inner diameter of the support ring is 5-10 mm smaller than the diameter of the explosive cartridge.

3. The prefabricated shaped charge blasting device according to claim 2, characterized in that, The energy-concentrating groove includes a V-shaped upper energy-concentrating groove disposed on the upper half of the sleeve and a V-shaped lower energy-concentrating groove disposed on the lower half of the sleeve, wherein the V-shaped upper energy-concentrating groove and the V-shaped lower energy-concentrating groove are symmetrically disposed on the sleeve.

4. The prefabricated shaped charge blasting device according to claim 1, characterized in that, The width of the detonating cord slot is equal to the diameter of the detonating cord, and the depth of the detonating cord slot is 1.5-2 mm less than the diameter of the detonating cord.

5. The assembled shaped charge blasting device according to claim 4, characterized in that, The detonating cord slot is located on the lower half of the support ring.

6. The prefabricated shaped charge blasting device according to claim 1, characterized in that, The outer diameter of the casing is equal to the diameter of the borehole.

7. The prefabricated shaped charge blasting device according to claim 3, characterized in that, The angle between the apex of the V-shaped upper energy concentrator and the V-shaped lower energy concentrator is 50°-70°; the width of the V-shaped upper energy concentrator and the V-shaped lower energy concentrator is 12-18mm.

8. The prefabricated shaped charge blasting device according to claim 1, characterized in that, A locking assembly is provided between the upper half-wall sleeve and the lower half-wall sleeve. The locking assembly includes a locking part and a locking groove, and the protruding part of the locking part and the groove part of the locking groove are adapted to each other.

9. The prefabricated shaped charge blasting device according to claim 8, characterized in that, The locking part and the locking groove are respectively provided at both ends of the upper half wall sleeve and the lower half wall sleeve along the arc direction; Alternatively, the locking part is provided at both ends of the upper half-wall sleeve along the arc direction; the locking groove is provided at both ends of the lower half-wall sleeve along the arc direction.

10. The prefabricated shaped charge blasting device according to claim 1, characterized in that, The sleeve and the support ring are made of PVC.

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