Millisecond blasting device in high step hole of strip mine

Abstract

The invention belongs to the technical field of millisecond blasting devices, and provides a millisecond blasting device in a high stepped hole of a strip mine. The charging part comprises a charging pipe and a charging outer net; the charging pipe is connected with the charging outer net; the charging outer net is arranged on the outer pipe wall of the charging pipe; the explosive charging pipe is filled with blasting explosives; the pre-splitting assembly is arranged on the charging part, and is positioned on the charging pipe; the presplitting assembly comprises a plurality of high-pressure sleeves and a plurality of sealing sleeves, and the high-pressure sleeves and the sealing sleeves are arranged on the charging pipe at intervals and evenly distributed in the axis direction of the charging pipe. And the ignition part is used for igniting the explosive in the explosive loading part so as to carry out blasting. The device is reasonable in design and easy to operate, the effect of multi-section sealing and one-by-one blasting of the internal pressurizing machine is adopted, presplitting treatment and efficient blasting can be synchronously carried out, the blasting efficiency is greatly improved, and therefore the device is suitable for industrial popularization.

Description

Technical Field

[0001] The invention relates to the technical field of micro-difference blasting devices, and in particular to a micro-difference blasting device in a high-step hole of an open-pit mine. Background Art

[0002] Step blasting usually refers to blasting operations with larger step heights, while in-hole micro-difference blasting is achieved by setting different delay times in different holes to control the order of blasting in order to achieve better crushing effects and reduce vibration.

[0003] However, due to the interference between holes during the explosion process, the effect of the first explosion in the order of blasting is much higher than that of the later explosion, which reduces the blasting efficiency.

[0004] Therefore, we propose a micro-difference blasting device for high-bench holes in open-pit mines, which can improve the blasting efficiency throughout the entire process. Summary of the Invention

[0005] In view of the defects in the prior art, the present invention provides a micro-difference blasting device for high-step holes in open-pit mines to improve the blasting efficiency throughout the entire process.

[0006] The present invention provides a micro-difference blasting device for high-step holes in open-pit mines, comprising: a charging portion, comprising a charging tube and a charging outer net; the charging outer net is arranged on the outer tube wall of the charging tube; the charging tube is filled with blasting explosives; a pre-splitting assembly, the pre-splitting assembly is arranged on the charging portion and located on the charging tube; the pre-splitting assembly comprises a high-voltage sleeve and a sealing sleeve, a plurality of the high-voltage sleeves and the sealing sleeves are provided, and are arranged at intervals on the charging tube and are evenly distributed along the axial direction of the charging tube; and an ignition component, the ignition component is used to ignite the explosive in the charging portion to perform blasting.

[0007] Furthermore, the charge section includes a bottom seal, which is fixedly mounted at one end of the charge tube and positioned within the blasthole. In practice, this design serves to seal the bottom and prevent the explosive's impact from leaking outward from the bottom, thereby effectively diffusing the impact around the tube wall.

[0008] Furthermore, multiple charge nets are provided, arranged along the axis of the charge tube and evenly spaced between the high-voltage bushing and the sealing bushing. In practical application, this design facilitates multi-stage impact. The shock waves generated by the multiple charge nets after blasting create a highly efficient, segmented impact effect, accelerating the impact blasting process and achieving micro-difference blasting within high-step holes.

[0009] Furthermore, the sealing sleeve includes a mounting ring and a sealing membrane. The mounting ring is provided with an outer ring groove and a mounting hole, and the mounting ring is fixedly mounted on the charge tube through the mounting hole. The sealing membrane is mounted on the outer ring groove. In actual use, the purpose of this design is to effectively seal the mounting ring, facilitating the subsequent placement of materials on the mounting ring and sealing with the sealing membrane. In actual operation, the sealing membrane can be implemented using a thin rubber film.

[0010] Furthermore, the sealing sleeve also includes a blasting body and an electronic igniter. The blasting body is disposed on the outer ring groove, and the electronic igniter is disposed on the outer ring groove and in proximity to the blasting body. The blasting body and the electronic igniter are electrically connected, and upon powering the electronic igniter, the blasting body is detonated, thereby destroying the sealing membrane. In practice, the purpose of this design is to facilitate the destruction of the sealing membrane. In actual operation, the blasting body is a micro-explosive, and the electronic igniter can be a common electric lighter. In this way, the explosion of the blasting body destroys the sealing membrane, causing it to burst, thereby opening the outer ring groove of the mounting ring.

[0011] Furthermore, the sealing sleeve also includes an expansion fluid, which is located in the outer ring groove of the mounting ring and expands in volume upon contact with oxygen. In practice, this expansion fluid primarily utilizes polyurethane foam, which effectively seals the blasthole. During operation, the expansion fluid diffuses outward along the outer ring groove, achieving a highly effective seal with the blasthole wall. This facilitates concentrated diffusion of blasting energy during subsequent high-step in-hole blasting, further improving blasting efficiency.

[0012] Furthermore, the sealing sleeve includes a main sleeve fixedly mounted on the charge tube; the main sleeve is provided with an outer membrane and an inner cavity; the outer membrane is positioned at the opening of the inner cavity, and the inner cavity is sealed and filled with high-pressure gas. In practical application, this design, combined with the aforementioned expansion seal, enables pre-cracking treatment for blasting in high-stepped holes. Thus, during actual operation, the outer membrane of the main sleeve is damaged by explosion, allowing the high-pressure gas sealed in the inner cavity to escape. This sudden overflow further ensures the effectiveness of blasting in segmented stepped holes.

[0013] Furthermore, the charge section includes multiple inner charge tubes, which are installed within the charge tube along its axis and below the outer charge net. The inner charge tubes are sealed with blasting explosives, which are detonated one by one via ignition elements. In practice, this design is intended to achieve a gradual, segmented blasting effect. In actual operation, this design effectively shatters the outer charge net and destroys the outer film. This also allows for a shorter separation between blasting and high-pressure pre-cracking, significantly ensuring the effectiveness of micro-difference blasting within high-bench holes in open-pit mines.

[0014] From the above technical solution, it can be seen that the beneficial effects of the micro-difference blasting device for high-step holes in open-pit mines provided by the present invention are: (1) In actual operation, the charge tube in this design adopts a paper cylindrical structure, which is convenient for molding. The explosive blasting effect produced by it is achieved through the secondary impact after the charge net is set outside; (2) At the same time, the outer net of the charge can also effectively protect the charge tube and ensure the stability of the charge tube before blasting; (3) At the same time, the blasting effect is enhanced by pre-cracking components, which increases the explosive impact force; (4) Moreover, the ignition device used is also an electronically controlled electronic ignition device, which can ignite accurately to the millisecond, greatly ensuring the ignition accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. In all the drawings, the various elements or parts are not necessarily drawn according to the actual scale.

[0016] Figure 1 A schematic diagram of the main structure of a micro-difference blasting device for high-bench holes in open-pit mines provided by an embodiment of the present invention; Figure 2 for Figure 1 The enlarged structural diagram of point A is shown; Figure 3 for Figure 1 The enlarged structural diagram of point B is shown; Figure 4 Schematic diagram of the installation structure of the sealing membrane on the sealing sleeve in the present invention; Figure 5 A schematic diagram of the working process of sealing a blast hole with an expansion fluid according to the present invention; Reference numerals: Charge part 1, charge tube 11, charge outer net 12, bottom sealing end 13, charge inner tube 14, pre-splitting assembly 2, high-voltage sleeve 21, main sleeve 211, outer film 2101, inner cavity 2102, sealing sleeve 22, mounting ring sleeve 221, sealing membrane 222, outer ring groove 2211, mounting hole 2212, blasting body 2213, electronic igniter 2214, expansion fluid 2215, ignition part 3. DETAILED DESCRIPTION

[0017] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0018] The embodiment is basically as shown in the attached Figures 1 to 5 As shown: like Figure 1-Figure 5 As shown, the present embodiment provides a micro-difference blasting device for high-step holes in open-pit mines, which can improve the blasting efficiency throughout the entire process.

[0019] The present invention provides a micro-difference blasting device for high-step holes in open-pit mines, comprising: a charging part 1, wherein the charging part 1 comprises a charging tube 11 and a charging outer net 12; the charging outer net 12 is arranged on the outer tube wall of the charging tube 11; the charging tube 11 is filled with blasting explosives; a pre-splitting assembly 2, wherein the pre-splitting assembly 2 is arranged on the charging part 1 and located on the charging tube 11; the pre-splitting assembly 2 comprises a high-voltage sleeve 21 and a sealing sleeve 22, wherein a plurality of the high-voltage sleeves 21 and the sealing sleeve 22 are provided and are arranged at intervals on the charging tube 11 and are evenly distributed along the axial direction of the charging tube 11; and an ignition element 3, wherein the ignition element 3 is used to ignite the explosive in the charging part 1 to perform blasting. In actual operation, the charge tube 11 in this design adopts a paper cylindrical structure, which makes it easy to shape. The explosive blasting effect it produces is achieved through the secondary impact of the charge outer net 12 after it is damaged; at the same time, the charge outer net 12 can also effectively protect the charge tube 11 and achieve the stability of the charge tube 11 before blasting; at the same time, the pre-splitting component 2 is used to enhance the blasting effect and improve the explosive impact force; moreover, the ignition part 3 used is also an electronically controlled electronic ignition device, which can ignite accurately to milliseconds, greatly ensuring the ignition accuracy.

[0020] In this embodiment, the charge section 1 further includes a bottom seal 13, which is fixedly mounted at one end of the charge tube 11 and positioned within the blasthole. In practice, this design serves to seal the bottom and prevent the explosive's impact from leaking outward from the bottom, thereby effectively diffusing the impact around the wall of the charge tube 11.

[0021] In this embodiment, multiple charge outer nets 12 are provided, arranged along the axis of the charge tube 11 and evenly spaced between the high-voltage bushing 21 and the sealing bushing 22. In practical application, this design facilitates multi-stage impact. The shock waves generated by the multiple charge outer nets 12 after blasting create a highly efficient, segmented impact effect, accelerating the impact blasting process and achieving micro-difference blasting within high-step holes.

[0022] In this embodiment, the sealing sleeve 22 includes a mounting ring 221 and a sealing membrane 222. The mounting ring 221 is provided with an outer annular groove 2211 and a mounting hole 2212. The mounting ring 221 is fixedly mounted on the charge tube 11 through the mounting hole 2212. The sealing membrane 222 is mounted on the outer annular groove 2211. In practice, the purpose of this design is to effectively seal the mounting ring 221, facilitating the subsequent placement of materials on the mounting ring 221 and sealing with the sealing membrane 222. In practice, the sealing membrane 222 can be made of thin rubber.

[0023] In this embodiment, the sealing sleeve 22 further includes a blasting body 2213 and an electronic igniter 2214. The blasting body 2213 is disposed on the outer annular groove 2211, and the electronic igniter 2214 is disposed on the outer annular groove 2211 and close to the blasting body 2213. The blasting body 2213 and the electronic igniter 2214 are electrically connected, and upon powering the electronic igniter 2214, the blasting body 2213 is detonated, thereby destroying the sealing membrane 222. In practice, the purpose of this design is to facilitate the destruction of the sealing membrane 222. In practice, the blasting body 2213 is made of micro-explosives, and the electronic igniter 2214 can be an ordinary electric lighter. In this way, the explosion of the blasting body 2213 destroys the sealing membrane 222, causing it to burst, thereby opening the outer annular groove 2211 of the mounting ring 221.

[0024] In this embodiment, the sealing sleeve 22 also includes an expansion fluid 2215. This expansion fluid 2215 is located in the outer annular groove 2211 of the mounting ring 221 and expands in volume upon contact with oxygen. In practice, this expansion fluid 2215 primarily utilizes polyurethane foam, which effectively seals the blasthole. During operation, the expansion fluid 2215 diffuses outward along the outer annular groove 2211, achieving a highly effective seal with the blasthole wall. This facilitates the concentrated diffusion of blasting energy during subsequent high-step in-hole blasting, further improving blasting efficiency.

[0025] In this embodiment, the sealing sleeve 22 includes a main sleeve 211, which is fixedly mounted on the charge tube 11. The main sleeve 211 is provided with an outer film 2101 and an inner cavity 2102. The outer film 2101 is positioned at the opening of the inner cavity 2102, and the inner cavity 2102 is sealed and filled with high-pressure gas. In actual use, this design, together with the aforementioned expansion seal, enables pre-cracking treatment for blasting in high-stepped holes. In this way, during actual operation, the outer film 2101 of the main sleeve 211 is damaged by explosion, allowing the high-pressure gas sealed in the inner cavity 2102 to escape. This sudden overflow further ensures the blasting effect of the segmented stepped hole.

[0026] In this embodiment, the charge section 1 further includes a plurality of charge inner tubes 14, which are installed within the charge tube 11 along its axis and below the charge outer net 12. Blasting explosives are sealed in the charge inner tubes 14 and detonated one by one via the ignition element 3. In practice, this design is intended to achieve a staged, gradual blasting effect. In actual operation, this design effectively shatters the charge outer net and destroys the outer film 2101. This also allows for a shorter separation between blasting and high-pressure pre-cracking, significantly ensuring the effectiveness of micro-difference blasting in high-bench holes in open-pit mines.

[0027] To sum up, this micro-difference blasting device in the high-step hole of an open-pit mine is not only reasonably designed, but also simple to operate. It can effectively improve the blasting efficiency. It adopts multi-stage sealing and the effect of blasting one by one by the internal pressurizer, which can realize the simultaneous pre-cracking treatment and efficient blasting, greatly improving the blasting efficiency. Therefore, this device is suitable for industry promotion.

[0028] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description. The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A micro-difference blasting device for high-step holes in open-pit mines, characterized in that: include: A charge section, comprising a charge tube and a charge outer net; the charge outer net is arranged on the outer tube wall of the charge tube; The charging tube is filled with blasting explosives; A pre-splitting assembly, the pre-splitting assembly being arranged on the charge portion and located on the charge tube; the pre-splitting assembly comprising a high-voltage sleeve and a sealing sleeve, a plurality of the high-voltage sleeve and the sealing sleeve being provided and spaced apart on the charge tube and evenly distributed along the axis of the charge tube; and An ignition component is used to ignite the explosive in the charge portion to perform blasting.

2. The micro-difference blasting device for high-step holes in open-pit mines according to claim 1, characterized in that: The charging part further includes a bottom sealing end, which is fixedly mounted on one end of the charging tube and is located in the direction of the blasting hole.

3. The micro-difference blasting device for high-step holes in open-pit mines according to claim 1, characterized in that: There are multiple charge outer nets, which are arranged along the axial direction of the charge tube and are evenly distributed in the area between the high-voltage bushing and the sealing bushing.

4. The micro-difference blasting device for high-step holes in open-pit mines according to claim 1, characterized in that: The sealing sleeve includes a mounting ring and a sealing membrane; the mounting ring is provided with an outer ring groove and a mounting hole, and the mounting ring is fixedly mounted on the charge tube through the mounting hole; the sealing membrane is mounted on the outer ring groove.

5. The micro-difference blasting device for high-step holes in open-pit mines according to claim 4, characterized in that: The sealing sleeve also includes an explosive body and an electronic igniter. The explosive body is arranged on the outer ring groove, and the electronic igniter is arranged on the outer ring groove and close to the direction of the explosive body. The explosive body and the electronic igniter are electrically connected, and the explosive body is detonated when the electronic igniter is powered on, thereby destroying the sealing membrane.

6. The micro-difference blasting device for high-step holes in open-pit mines according to claim 4, characterized in that: The sealing sleeve further comprises an expansion fluid, which is arranged in the outer ring groove of the mounting ring sleeve and expands in volume after coming into contact with oxygen.

7. The micro-difference blasting device for high-step holes in open-pit mines according to claim 1, characterized in that: The sealing sleeve comprises a main sleeve, and the main sleeve is fixedly mounted on the charge tube; The main sleeve is provided with an outer film and an inner cavity; wherein the outer film is provided at the cavity opening of the inner cavity, and the inner cavity is sealed and filled with high-pressure gas.

8. The micro-difference blasting device for high-step holes in open-pit mines according to claim 1, characterized in that: The charging part also includes a charging inner tube, which is provided in plurality and is installed in the charging tube along the axial direction of the charging tube and is located below the charging outer net; wherein the charging inner tube is sealed with blasting explosives and is detonated one by one by an ignition component.

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