Uncoupled charge positioning apparatus, and blast hole

Abstract

An uncoupled charge positioning apparatus, and a blast hole comprising the uncoupled charge positioning apparatus. The uncoupled charge positioning apparatus comprises: a sleeve (1), comprising an engagement unit (11) arranged thereon; and a plurality of brackets (12) movably connected to the sleeve (1) by means of the engagement unit (11), the plurality of brackets (12) being arranged along the circumferential direction of the sleeve (1). According to the uncoupled charge positioning apparatus, and the blast hole comprising the uncoupled charge positioning apparatus, the positions of uncoupled charge cartridges can be flexibly adjusted, so that the rock mass on the blast side can be fully destroyed, the damage to the rock mass on the side to be protected is reduced, the stability of the surrounding rock and the flatness of the excavation contour surface are ensured, and the explosive energy utilization is improved. The operation is simple, the working efficiency is high, the safety is good, and the economic cost is decreased.

Description

Uncoupled charge positioning device and blasthole Technical Field

[0001] The invention belongs to the technical field of blasting materials, and in particular relates to an uncoupled charge positioning device and a blasthole comprising the uncoupled charge positioning device. Background Art

[0002] Blasting has become a common method of mineral resource development due to its key advantages of low cost and high efficiency. In smooth blasting, an uncoupled charge structure is commonly employed. Due to the gap between the charge coil and the blasthole, gravity forces the charge coil to contact the lower wall of the blasthole, resulting in an eccentric uncoupled charge structure. This eccentric charge structure concentrates the energy released by the explosive detonation primarily at the bottom of the blasthole. This results in highly irregular contours of the peripheral holes after blasting, poor fragmentation on the blasting side, and high damage on the retained side. This reduces the utilization of explosive energy and significantly impacts blasting effectiveness. Rock fragmentation is more pronounced near the charge side of the eccentric uncoupled charge. Therefore, if the position of the uncoupled charge coil can be properly adjusted, the blasting effect of the uncoupled charge can be optimized, significantly reducing economic losses.

[0003] Based on this, the existing technology still needs to be improved.

[0004] Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to use an uncoupled charge positioning device to adjust the position of the uncoupled charge roll in the smooth surface blasting, so as to effectively improve the pre-splitting blasting effect, reduce the slope support and maintenance costs, and reduce the economic losses of the blasting.

[0006] Specifically, according to one aspect of the present invention, there is provided an uncoupled charge positioning device, which includes: a sleeve, the sleeve including a coupling unit arranged thereon; and a plurality of brackets movably connected to the sleeve via the coupling unit, the plurality of brackets being arranged along the circumference of the sleeve.

[0007] In an embodiment of the present invention, the coupling unit and the sleeve are integrally formed, and the sleeve and the bracket are both made of PVC.

[0008] In an embodiment of the present invention, the sleeve includes an inner wall, an outer wall, and a space arranged between the inner wall and the outer wall, and the coupling unit includes an annular engaging groove arranged on the inner wall along the circumference of the sleeve and an annular incision along the circumference of the sleeve and defined by the outer wall, and the annular engaging groove is arranged opposite to the annular incision.

[0009] In an embodiment of the present invention, the width of the annular engaging tooth groove along the axial direction of the sleeve is greater than the width of the annular cutout along the axial direction of the sleeve.

[0010] In an embodiment of the present invention, the engaging unit further includes an opening provided on the annular engaging groove, and the bracket enters the space through the opening and engages with the annular engaging groove.

[0011] In an embodiment of the present invention, the bracket includes a first end, the width of the first end is greater than the width of the annular incision and smaller than the width of the annular engaging tooth groove, and an engaging tooth is provided on the first end, and the first end enters the space through the opening and is capable of moving within the space and engaging with the annular engaging tooth groove through the engaging tooth.

[0012] In an embodiment of the present invention, the number of the openings is plural, the plurality of openings are arranged at predetermined angle intervals in the circumferential direction of the sleeve, and one opening corresponds to one bracket.

[0013] In an embodiment of the present invention, the bracket further includes a middle part connected to the first end and a second end connected to the middle part, the width of the middle part is slightly smaller than the width of the annular incision and the middle part is a spiral ejection structure, and the second end is provided with an end cap.

[0014] In an embodiment of the present invention, one end of the end cap is connected to the spring element of the spiral ejection structure, and the other end is provided with an end cap top, and the end cap top is hemispherical.

[0015] According to another aspect of the present invention, a blasthole is provided, comprising the uncoupled charge positioning device as described above, wherein the uncoupled charge positioning device is entirely arranged in the blasthole, and both ends of the sleeve of the uncoupled charge positioning device each include a coupling unit, and the interior of the sleeve can accommodate a powder roll.

[0016] The invention has a simple structure and is easy to operate. The position of the uncoupled charge roll or charge bag can be adjusted by adjusting the angle and length of the bracket, thereby fully destroying the rock mass on the blasted side, reducing damage to the rock mass on the side that needs to be protected, ensuring the stability of the surrounding rock and the flatness of the excavation contour surface, and improving the energy utilization rate of the explosives. It is simple to operate, has high work efficiency, good safety, saves economic costs, and is worthy of large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 shows a cross-sectional schematic diagram of an uncoupled charge positioning device provided by one embodiment of the present invention;

[0018] FIG2 shows a side view of an uncoupled charge positioning device according to an embodiment of the present invention;

[0019] FIG3 shows a schematic top view of an uncoupled charge positioning device provided by one embodiment of the present invention;

[0020] FIG4 shows a schematic diagram of the three-dimensional structure of a sleeve provided by an embodiment of the present invention;

[0021] FIG5 is a schematic diagram showing the three-dimensional structure of an annular engaging groove provided by one embodiment of the present invention;

[0022] FIG6 shows a cross-sectional schematic diagram of a bracket provided by one embodiment of the present invention;

[0023] FIG7 shows a schematic side view of a bracket provided by one embodiment of the present invention; and

[0024] FIG8 shows a schematic top view of a bracket provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in the present invention, it is readily apparent to those skilled in the art that various modifications are feasible without departing substantially from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, variations, and deletions may be made to the design, operating conditions, and parameters of the following exemplary embodiments.

[0026] According to the present invention, in one aspect, an uncoupled charge positioning device 10 is provided, as shown in Figures 1-5 , comprising: a sleeve 1 including a coupling unit 11 disposed thereon; and a plurality of brackets 12 movably connected to the sleeve 1 via the coupling unit 11, with the brackets 12 being arranged along the circumference of the sleeve 1. The sleeve 1 may be a generally cylindrical sleeve with a hollow interior for accommodating a cartridge or cartridge. By adjusting the angle and length of the brackets 12, the uncoupled charge positioning device 10 can be positioned differently. Thus, when the uncoupled charge positioning device 10 of the present invention is placed in a blasthole and used in that blasthole, the pre-splitting blasting effect can be effectively improved, slope support and maintenance costs can be reduced, and the economic losses from sidewall blasting can be mitigated.

[0027] In an embodiment of the present invention, the coupling unit 11 and the sleeve 1 can be integrally formed, and the materials of the sleeve 1 and the bracket 12 can both be PVC. The sleeve 1 can include one or more coupling units 11. For example, a coupling unit 11 can be provided at each of the two axial ends of the sleeve 1, thereby providing better stable positioning for the sleeve 1. In such an embodiment, the length of the sleeve 1 can be 100 to 1000 mm, the outer diameter can be 35 to 52 mm, the wall thickness can be 1 to 5 mm, and the outer diameter of the middle part of the bracket 12 connected to the sleeve 1 through the coupling unit 11 (as described in other parts of the present invention) can be 2.5 to 7.0 mm. In another embodiment, only one coupling unit 11 can be provided in the middle part of the sleeve 1.

[0028] In an embodiment of the present invention, the sleeve 1 includes an inner wall 13, an outer wall 14, and a space 15 disposed between the inner wall 13 and the outer wall 14. The engagement unit 11 may include an annular interlocking groove 2 disposed on the inner wall 13 along the circumference of the sleeve 1, and an annular notch 16 defined by the outer wall 14 along the circumference of the sleeve 1, with the annular interlocking groove 2 disposed opposite the annular notch 16. In the embodiment shown in FIG4 , the annular interlocking groove 2 is located within the space 15, and a portion of the outer wall 14 corresponding to the annular interlocking groove 2 disposed on the inner wall 13 is removed, forming the annular notch 16. The width d2 of the annular interlocking groove 2 along the axial direction of the sleeve 1 (shown in FIG5 ) is greater than the width d1 of the annular notch 16 along the axial direction of the sleeve 1 (shown in FIG4 ). This arrangement facilitates the ability of the bracket 12 to slide within the space 15 and engage with the annular interlocking groove 2, as described elsewhere in this application. In addition, the engaging unit 11 may further include an opening 3 provided on the annular engaging groove 2 , and the bracket 12 may enter the space 15 through the opening 3 and engage with the annular engaging groove 2 .

[0029] In an embodiment of the present invention, with reference to Figures 1-5 and further to Figures 6-8 , the bracket 12 includes a first end 21, the width of which is greater than the width d1 of the annular cutout 16 and less than the width d2 of the annular engaging tooth groove 2. The shape of the first end 21 can generally correspond to the shape of the opening 3, so that the first end 21 can enter the space 15 through the opening 3. In the embodiment shown in Figure 4 , the shape of the first end 21 and the shape of the opening 3 can be generally rectangular or square. However, other shapes, such as circular, elliptical, and other polygonal shapes, are within the scope of the present invention. The first end 21 is provided with an engaging tooth 6, which is capable of moving within the space 15 and engaging with the annular engaging tooth groove 2 through the engaging tooth 6, thereby achieving engagement and separation between the bracket 12 and the sleeve 1, thereby adjusting the angle of the bracket 12 relative to the sleeve 1.

[0030] In embodiments of the present invention, there can be multiple openings 3, arranged at predetermined angles around the circumference of the sleeve 1, with each opening 3 corresponding to one bracket 12 or multiple brackets 12. In the embodiment shown in FIG1 , three openings 3 are provided, and correspondingly, three brackets 12 are provided. Each bracket 12 can enter the space 15 of the sleeve 1 through its corresponding opening 3. This arrangement is particularly advantageous. After the uncoupled charge positioning device 10 is placed in the blasthole, by adjusting the length and angle of the bracket 12 (as described elsewhere in the present invention), the three ends of the bracket 12 can abut against the inner wall of the blasthole, forming a triangular contact point, providing the most stable structure. In other embodiments, other numbers of openings 3 or other numbers of brackets 12 may be included. In additional embodiments, only one opening 3 may be included, and multiple brackets 12 can enter the space 15 of the sleeve 1 through this single opening 3.

[0031] In an embodiment of the present invention, the stent 12 may further include a middle portion 22 connected to the first end 21 and a second end 23 connected to the middle portion 22. The width of the middle portion 22 is slightly smaller than the width d1 of the annular cutout 16, allowing the middle portion 22 and the portion above the middle portion 22 to move smoothly through the annular cutout 16. The middle portion 22 may be a spiral ejection structure 5, which includes an ejection core (not numbered in the figure), a spring element (not numbered in the figure) disposed on the ejection core, and a housing for accommodating the ejection core. The second end 23 is provided with an end cap 24, one end of which is connected to the spring element of the spiral ejection structure 5 and the other end of which is provided with an end cap top 4, which is hemispherical. The spring element and the ejection core of the spiral ejection structure 5 allow the length of the stent 12 to be adjusted. Combined with the angle adjustment of the stent 12 achieved by sliding the stent 12 within the space 15, the uncoupled charge positioning device 10 can be positioned at different positions.

[0032] The following describes in detail embodiments of the present invention.

[0033] The present invention provides an uncoupled charge positioning device 10 and a method for using the same. The method may include the following steps:

[0034] Step 1: First install the bracket 12 from the opening 3, and then adjust the bracket 12 to a suitable angle and length according to actual needs.

[0035] Step 2: After installing the bracket 12, place the device 10 into the blast hole and then complete the charging.

[0036] As shown in Figures 1, 2, and 3, the uncoupled charge positioning device 10 of the present invention includes a sleeve 1 and a bracket 12. The main body of the sleeve 1 is a PVC tube, with bracket adjustment structures provided at both ends. The sleeve 1 can be divided into three layers: the first layer is an inner wall 13, the third layer is an outer wall 14, and the middle layer is located between the first and third layers. The main body of the bracket adjustment structure is an annular interlocking groove 2, which is located in the middle layer of the PVC tube. The third layer—i.e., the layer above the annular interlocking groove—defines an annular cutout 16. The width of the annular cutout 16 is smaller than the width of the annular interlocking groove 2, thereby confining the bracket 12 within the space 15. The annular interlocking groove 2 has an opening 3 every 120 degrees to facilitate the insertion of the bracket 12. The lower end of the bracket 12 is provided with interlocking teeth 6. The angle of the bracket 12 can be adjusted by adjusting the position of the interlocking teeth 6 in the annular interlocking groove 2. The central portion 22 of the support 12 is a spiral ejection structure 5. This structure comprises an ejection core and a housing that houses the core. Furthermore, a spring element is wound around at least a portion of the core. An end cap 24 is located at the top of the spiral ejection structure 5. One end of the end cap 24 is connected to the spring element, and the other end is provided with a hemispherical end cap 4, which is designed to abut the inner wall of the blasthole.

[0037] Preferably, the sleeve 1 is a PVC tube with a length of 100 to 1000 mm, an outer diameter of 35 to 52 mm, and a wall thickness of 1 to 5 mm.

[0038] Preferably, the outer diameter of the middle portion 22 of the stent 12 is 2.5 to 7.0 mm.

[0039] The working principle and usage process of the present invention are as follows: a bracket 12 is provided on the outside of the sleeve 1, which can place the powder bag in the middle position of the blast hole. The bottom end of the bracket 12 is provided with an engaging tooth 6, and the engaging tooth 6 slides in the annular engaging groove 2 to adjust the angle of the bracket 12. The bracket 12 is a spiral ejection structure 5, and the length of the bracket 12 can be adjusted. By adjusting the angle and length of the bracket 12, the powder bag can be placed at any position in the blast hole, so that the blasted rock mass is fully destroyed; when in use, the powder bag is first placed in the sleeve 1, and the bracket 12 is installed from the opening 3. The angle and length of each bracket 12 are adjusted according to actual conditions so that the powder bag is in a suitable position to achieve a more perfect blasting effect.

[0040] The present invention provides an uncoupled charge positioning device 10, through which the position of the uncoupled charge bag can be flexibly adjusted, thereby fully destroying the rock mass on the blasted side, reducing damage to the rock mass on the side that needs to be protected, ensuring the stability of the surrounding rock and the flatness of the excavation contour surface, improving the energy utilization rate of the explosives, and having simple operation, high work efficiency, good safety, and economic cost savings.

[0041] According to another aspect of the present invention, a blasthole is provided, comprising the uncoupled charge positioning device 10 as described in the aforementioned embodiment, wherein the uncoupled charge positioning device 10 can be entirely disposed within the blasthole, and both ends of a sleeve 1 of the uncoupled charge positioning device 10 can each include a coupling unit 11, and the interior of the sleeve 1 can accommodate a cartridge.

[0042] It should be understood that, unless mutually exclusive, all embodiments, features, and advantages described above for the uncoupled charge positioning device 10 according to the present invention are equally applicable to the blasthole according to the present invention. In other words, all embodiments and variations of the uncoupled charge positioning device 10 described above can be directly transferred and applied to the blasthole according to the present invention, and incorporated therein. For the sake of brevity, these details will not be repeated here.

[0043] In summary, the present invention can flexibly adjust the position of the uncoupled charge cartridge, effectively improve the pre-splitting blasting effect, reduce the slope support and maintenance costs, and reduce the economic losses of the blasting.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced with equivalents without departing from the spirit and scope of the present invention, it should be included in the scope of protection of the claims of the present invention.

Claims

1. An uncoupled charge positioning device, characterized in that: include: a sleeve including an engagement unit disposed thereon; as well as A plurality of brackets are movably connected to the sleeve via the coupling unit, and the plurality of brackets are arranged along the circumference of the sleeve.

2. The uncoupled charge positioning device according to claim 1, characterized in that: The joint unit is integrally formed with the sleeve, and the sleeve and the bracket are both made of PVC.

3. The uncoupled charge positioning device according to claim 1, characterized in that: The sleeve includes an inner wall, an outer wall and a space arranged between the inner wall and the outer wall, and the coupling unit includes an annular engaging tooth groove arranged on the inner wall along the circumference of the sleeve and an annular incision along the circumference of the sleeve and defined by the outer wall, and the annular engaging tooth groove is arranged opposite to the annular incision.

4. The uncoupled charge positioning device according to claim 3, characterized in that: The width of the annular meshing tooth groove along the axial direction of the sleeve is greater than the width of the annular cutout along the axial direction of the sleeve.

5. The uncoupled charge positioning device according to claim 4, characterized in that: The engaging unit further includes an opening provided on the annular engaging groove, and the bracket enters the space through the opening and engages with the annular engaging groove.

6. The uncoupled charge positioning device according to claim 5, characterized in that: The bracket includes a first end, the width of which is greater than the width of the annular incision and less than the width of the annular engaging tooth groove, and an engaging tooth is provided on the first end, and the first end enters the space through the opening and is capable of moving in the space and engaging with the annular engaging tooth groove through the engaging tooth.

7. The uncoupled charge positioning device according to claim 5, characterized in that: The number of the openings is plural, the plurality of openings are arranged at predetermined angle intervals in the circumferential direction of the sleeve, and one opening corresponds to one bracket.

8. The uncoupled charge positioning device according to claim 6, characterized in that: The bracket further includes a middle portion connected to the first end and a second end connected to the middle portion, the width of the middle portion is slightly smaller than the width of the annular cutout and the middle portion is a spiral ejection structure, and the second end is provided with an end cap.

9. The uncoupled charge positioning device according to claim 8, characterized in that: One end of the end cap is connected to the spring element of the spiral ejection structure, and the other end is provided with an end cap top, and the end cap top is hemispherical.

10. A blast hole, characterized in that: It comprises the uncoupled charge positioning device as described in any one of the preceding claims 1-9, wherein the uncoupled charge positioning device is arranged as a whole in the blast hole, and both ends of the sleeve of the uncoupled charge positioning device respectively include a coupling unit, and the interior of the sleeve can accommodate a medicine roll.

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