Blasting system

Abstract

The invention provides a blasting system. The blasting system comprises a primer detonator; the blasting subsystem comprises a first detonating cord and a plurality of detonating assemblies, and the first detonating cord is connected with the detonating cap; the multiple detonating assemblies are used for being arranged in one-to-one correspondence with the multiple blast holes, all the detonating assemblies are used for being arranged in the corresponding blast holes, all the detonating assemblies are connected with the first detonating cord and are sequentially arranged at intervals in the extending direction of the first detonating cord, and a one-way detonating device is arranged on the portion, between every two adjacent detonating assemblies, of the first detonating cord. The blasting system solves the problem that the whole blasting area is uncontrollable due to early blasting of individual blast holes in high-temperature blasting in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of engineering blasting, and in particular to a blasting system. Background Art

[0002] High temperature blasting is blasting at a temperature above 60℃, such as high temperature furnace demolition blasting, high temperature fire zone coal mining, etc., which all involve high temperature working environment. In recent years, many major safety accidents have occurred in the process of coal mining blasting in high temperature fire zones. The reason is that the premature explosion and misexplosion of the blastholes in the neutron network during the blasting operation caused the misexplosion of the entire detonation network. These accidents seriously threaten the lives of personnel.

[0003] The requirements for the detonation network in high-temperature fire areas generally include: the detonation network is easy to connect; the blasting equipment used can meet the safety construction requirements in high-temperature environments and has good temperature resistance; the transmission of the explosion signal of the detonation network is stable and reliable, avoiding missed explosions and blind shots due to explosion transmission failures.

[0004] The blasting materials used in high temperature area blasting are generally conventional detonators and explosives. At present, the main means of controlling premature explosion and refusal explosion in high temperature fire area blasting include temporary cooling of blastholes, thermal insulation protection of blasting equipment, and control of charging time, and some experience has been gained.

[0005] However, there is insufficient research on the selection of high-temperature blasting equipment and the design of detonation networks suitable for blasting in high-temperature fire zones. Most of the research is based on their own construction experience, which leads to the risk of premature explosion of individual blast holes in high-temperature blasting, causing the overall blasting area to be uncontrollable, thus expanding the scope of premature explosion accidents. Summary of the invention

[0006] The main purpose of the present invention is to provide a blasting system to solve the problem in the prior art that premature explosion of individual blast holes in high-temperature blasting leads to uncontrollable overall blasting area.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a blasting system, comprising: a detonating cap; a blasting subsystem, comprising a first detonating cord and a plurality of detonating assemblies, the first detonating cord being connected to the detonating cap; the plurality of detonating assemblies being arranged in one-to-one correspondence with a plurality of blast holes, each detonating assembly being arranged in a corresponding blast hole, each detonating assembly being connected to the first detonating cord and being arranged in sequence and at intervals along the extension direction of the first detonating cord, and a one-way explosion transmission device being arranged on the first detonating cord between two adjacent detonating assemblies.

[0008] Furthermore, the blasting subsystem also includes: a plurality of second detonating cords, which are arranged one-to-one with the plurality of detonating assemblies, and each detonating assembly is connected to the first detonating cord through the corresponding second detonating cord; wherein each second detonating cord is provided with a one-way explosion transmission device.

[0009] Furthermore, the blasting system includes multiple blasting subsystems; the blasting system also includes: a third detonating cord, multiple blasting subsystems are connected to the detonating cap through the third detonating cord, multiple blasting subsystems are arranged in sequence along the extension direction of the third detonating cord, and a one-way explosion transmission device is arranged on the third detonating cord between two adjacent blasting subsystems.

[0010] Furthermore, the blasting system also includes: a fourth detonating cord, through which the detonating cap is connected to the third detonating cord; wherein the fourth detonating cord is provided with a one-way explosion transmission device.

[0011] Furthermore, the blasting cap is an electronic detonator.

[0012] Furthermore, the one-way explosion transmission device is a one-way explosion tube.

[0013] Furthermore, the blasting system also includes a waterproof structure, which is wrapped around the connection of the one-way explosive transmission device.

[0014] Furthermore, the detonating assembly includes: an explosive package, which is used to be arranged in the blast hole, and the explosive package is connected to the first detonating cord.

[0015] Furthermore, the detonating assembly also includes: a main charge, which is used to be arranged in the blast hole and wrapped around the outside of the detonating charge.

[0016] Furthermore, the detonating assembly also includes: a filling portion, which is used to be arranged in the blast hole and located on the top of the main charge.

[0017] By applying the technical solution of the present invention, the blasting system includes a detonating cap and a blasting subsystem, the blasting subsystem includes a first detonating cord and a plurality of detonating assemblies, the first detonating cord is used for explosion transmission connection between the plurality of detonating assemblies of the blasting subsystem, the first detonating cord between adjacent detonating assemblies of the blasting subsystem is intermittently processed and then connected through a one-way explosion transmission device, so as to achieve one-way explosion transmission between blast holes of the subsystem, the purpose of irreversible explosion transmission is achieved, the expansion of the explosion range is avoided, and the problem of uncontrollable overall explosion area caused by premature explosion of individual blast holes in high-temperature blasting is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram showing an embodiment of a blasting system according to the present invention is shown;

[0020] Figure 2 A schematic diagram showing a detonation assembly of a blasting system according to the present invention is shown;

[0021] Figure 3 The figure shows a connection schematic diagram of a one-way explosion transmission device of a blasting system according to the present invention.

[0022] The above drawings include the following reference numerals:

[0023] 1. Detonator;

[0024] 21. Fourth detonating cord; 22. First detonating cord; 23. Third detonating cord; 24. Second detonating cord;

[0025] 3. One-way explosive transmission device;

[0026] 4. Gunhole;

[0027] 5. Explosive charge;

[0028] 6. Main charge;

[0029] 7. Filling part. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] The present invention provides a blasting system, please refer to Figures 1 to 3 , including: a detonating cap 1; a blasting subsystem, including a first detonating cord 22 and a plurality of detonating assemblies, the first detonating cord 22 being connected to the detonating cap 1; a plurality of detonating assemblies being arranged in one-to-one correspondence with a plurality of blastholes 4, each detonating assembly being arranged in a corresponding blasthole 4, each detonating assembly being connected to the first detonating cord 22 and being arranged in sequence at intervals along the extension direction of the first detonating cord 22, and a one-way explosion transmission device 3 being arranged on the first detonating cord 22 between two adjacent detonating assemblies.

[0034] The blasting system of the present invention comprises a detonating cap 1 and a blasting subsystem, wherein the blasting subsystem comprises a first detonating cord 22 and a plurality of detonating assemblies, wherein the first detonating cord 22 is used for explosion transmission connection between the plurality of detonating assemblies of the blasting subsystem, and the first detonating cord 22 between adjacent detonating assemblies of the blasting subsystem is intermittently processed and then connected through a one-way explosion transmission device 3, thereby achieving one-way explosion transmission between blast holes of the subsystem and the purpose of irreversible explosion transmission, avoiding the expansion of the explosion range, and solving the problem that the premature explosion of individual blast holes in high-temperature blasting leads to uncontrollable overall explosion area.

[0035] Specifically, Figure 3 As shown, the one-way explosion transmission device 3 is designed based on the explosion elimination principle of the explosion elimination chamber and the detonation principle of the basic detonator, which ensures that the detonation shock wave can only propagate in one direction; the detonation shock wave enters from the A end, and ignites the explosive after being weakened by the explosion elimination chamber, and the explosive detonates the high explosive to generate a detonation wave that can detonate the detonating cord again; if the shock wave enters from the B end, the power is weakened after passing through the explosion elimination chamber and is not enough to detonate the detonating cord.

[0036] Among them, the detonating cord, also known as the detonating cord, is a rope-shaped detonating device, which is mainly made of single-element high explosives such as RDX or PETN as the core, and is wrapped with plastic or cotton, linen, fiber and other materials. The detonating cord itself needs another detonating device to detonate. A detonating cap is set at one end of the detonating cord, and the detonating cord will be stimulated, transferring the explosion to the other end, thereby achieving the effect of detonating the explosive bag or another detonating cord in contact with it.

[0037] In this embodiment, the blasting subsystem further includes: a plurality of second detonating cords 24, wherein the plurality of second detonating cords 24 are arranged in one-to-one correspondence with the plurality of detonating assemblies, and each detonating assembly is connected to the first detonating cord 22 via the corresponding second detonating cord 24; wherein each second detonating cord 24 is provided with a one-way explosion transmission device 3.

[0038] In specific implementation, the second detonating cord 24 is used to transmit the system detonation wave to the explosive package 5 in the hole; one end of the second detonating cord 24 is connected to the first detonating cord 22, and the other end is provided with a one-way explosion transmission device 3, which is connected to the explosive package 5 in the blast hole after passing through the one-way explosion transmission device 3.

[0039] In this embodiment, the blasting system includes multiple blasting subsystems; the blasting system also includes: a third detonating cord 23, multiple blasting subsystems are connected to the detonating cap 1 through the third detonating cord 23, multiple blasting subsystems are arranged in sequence along the extension direction of the third detonating cord 23, and a one-way explosion transmission device 3 is provided on the third detonating cord 23 between two adjacent blasting subsystems.

[0040] In specific implementation, the third detonating cord 23 is used for explosion transmission connection between multiple blasting subsystems. The third detonating cord 23 between adjacent blasting subsystems is intermittently processed and then connected through the one-way explosion transmission device 3, so as to achieve the purpose of delay between blasting subsystems and one-way irreversible explosion transmission between subsystems.

[0041] In this embodiment, the blasting system further includes: a fourth detonating cord 21 , through which the blasting cap 1 is connected to the third detonating cord 23 ; wherein the fourth detonating cord 21 is provided with a one-way explosion transmission device 3 .

[0042] In a specific implementation, one end of the fourth detonating cord 21 is connected to the blasting cap 1 as the detonation point of the system, and the other end of the fourth detonating cord 21 is connected to the first detonating cord 22 and the third detonating cord 23 .

[0043] Optionally, the blasting cap 1 is an electronic detonator, also called a digital electronic detonator. By combining the detonation function of the digital electronic detonator, the detonation transmission and detonation function of the detonating cord, and the irreversible propagation function of the detonation wave of the one-way explosion transmission device 3, an adaptive blasting system is designed to realize the irreversible explosion transmission of the high-temperature fire zone blasting network.

[0044] Optionally, the one-way explosion transmission device 3 is a one-way explosion tube.

[0045] Specifically, the blasting system further includes a waterproof structure, which is wound around the connection of the one-way explosion transmission device 3 .

[0046] Optionally, the waterproof structure is a waterproof tape, and the waterproof tape is used to wrap the one-way explosive transmission device 3 around the connection points on different detonating cords.

[0047] In this embodiment, the detonating assembly includes: an explosive package 5 for being arranged in the blast hole 4 , and the explosive package 5 is connected to the first detonating cord 22 .

[0048] In this embodiment, the detonating assembly further includes: a main charge 6 , which is used to be arranged in the blast hole 4 and wrapped around the outside of the detonating charge 5 .

[0049] In this embodiment, the detonating assembly further includes: a filling portion 7 , which is used to be arranged in the blast hole 4 and located on the top of the main charge 6 .

[0050] The present invention designs an irreversible blasting system for blasting in high-temperature fire zones in open-pit mines. On the basis of using general blasting equipment, the irreversible transmission of the detonation wave in the detonation system is realized, so that when blasting in the high-temperature fire zone, the explosion is transmitted in a predetermined direction, avoiding the risk of premature explosion of individual holes in high-temperature blasting leading to uncontrollable overall explosion area. The problem that the reversibility of high-temperature fire zones easily leads to the expansion of the scope of premature explosion accidents is solved. In specific implementation, if there is a premature explosion accident in a certain blast hole, it will not cause the explosion of other blast holes and will not affect the forward explosion transmission function of the original detonation system, ensuring that even if premature explosion occurs, the blast holes in the remaining normal explosion transmission direction will be normally detonated.

[0051] The beneficial technical effects of the blasting system of the present invention include: the connection structure of the blasting system is clear and simple, which improves the blasting efficiency of the blasting system; when an unexpected premature explosion occurs in any blast hole in the blasting area, the detonation wave will not propagate to the blasting system; when a premature explosion occurs in a detonating cord or explosive transmission element at any point in the blasting system in the blasting area, the detonation wave propagates irreversibly in the system and the impact range is small.

[0052] During specific implementation, the working process of the blasting system of the present invention is as follows:

[0053] Step 1: Blasting in the high-temperature fire zone of the open-pit mine, lead out the detonating cap 1 from the detonation point, connect the fourth detonating cord 21, and propagate the detonation wave to the blasting zone after the detonating cap 1 is detonated. The third detonating cord 23 is laid in parallel along the direction of the resistance line in the front row of blast holes 4, one end of which is connected to the fourth detonating cord 21, and the other end is connected to the one-way explosive transmission device 3, and the detonation wave of the fourth detonating cord 21 is introduced into the third detonating cord 23; between the two adjacent blast holes 4 in the front row, according to the delay time design between the holes, a one-way explosive transmission device 3 with a corresponding delay time is selected, and the detonation end of the one-way explosive transmission device 3 is pointed to the detonation direction designed by the system, and the third detonating cord 23 of the two adjacent blast holes 4 in the front row is inserted into the connecting sleeves at both ends of the one-way explosive transmission device 3, and is tightly tied with electrical tape, so that the detonation wave is transmitted unidirectionally between the rows.

[0054] Step 2: Lay the first detonating cord 22 in each row of holes in the blasting area, connect one end of the first detonating cord 22 to the third detonating cord 23 in the front row, and connect the other end to the one-way explosive transmission device 3; similarly, point the explosive transmission end of the one-way explosive transmission device 3 in the designed explosive transmission direction of the system, insert the first detonating cord 22 between two adjacent rows into the connecting sleeves at both ends of the one-way explosive transmission device 3, and tie them tightly with electrical tape.

[0055] Step 3: Insert one end of the second detonating cord 24 into the explosive package 5, which is usually emulsion explosive, and firmly bind the second detonating cord 24 and the explosive package 5 with electrical tape. The other end of the second detonating cord 24 is connected to the one-way explosive transmission device 3, and then connected to the first detonating cord 22 after passing through the one-way explosive transmission device 3, and tied tightly with electrical tape.

[0056] Step 4: During detonation, the detonating cap 1 is detonated at the detonation point. The detonating cap 1 detonates the fourth detonating cord 21 to generate a shock wave. The shock wave is transmitted along the fourth detonating cord 21 and transmitted to the first detonating cord 22 and the third detonating cord 23, forming a detonation shock wave between each column of holes and rows.

[0057] In summary, the connection between the detonating cords of the blasting system of the present invention and the connection between the detonating cord and the one-way explosion transmission device 3 are more firm and reliable, making the connection waterproof, pressure-resistant and flame-retardant, and preventing the occurrence of explosion refusal and premature explosion.

[0058] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0059] The blasting system of the present invention comprises a detonating cap 1 and a blasting subsystem, wherein the blasting subsystem comprises a first detonating cord 22 and a plurality of detonating assemblies, wherein the first detonating cord 22 is used for explosion transmission connection between the plurality of detonating assemblies of the blasting subsystem, and the first detonating cord 22 between adjacent detonating assemblies of the blasting subsystem is intermittently processed and then connected through a one-way explosion transmission device 3, thereby achieving one-way explosion transmission between blast holes of the subsystem and the purpose of irreversible explosion transmission, avoiding the expansion of the explosion range, and solving the problem that the premature explosion of individual blast holes in high-temperature blasting leads to uncontrollable overall explosion area.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blasting system, characterized in that: include: Detonator (1); The blasting subsystem comprises a first detonating cord (22) and a plurality of detonating assemblies, wherein the first detonating cord (22) is connected to the blasting cap (1); the plurality of detonating assemblies are used to be arranged in a one-to-one correspondence with a plurality of blast holes (4), each of the detonating assemblies is used to be arranged in a corresponding blast hole (4), each of the detonating assemblies is connected to the first detonating cord (22) and is arranged in sequence and spaced apart along the extension direction of the first detonating cord (22), and a one-way explosion transmission device (3) is arranged on the first detonating cord (22) between two adjacent detonating assemblies.

2. The blasting system according to claim 1, characterized in that: The blasting subsystem also includes: A plurality of second detonating cords (24), wherein the plurality of second detonating cords (24) are arranged in one-to-one correspondence with the plurality of detonating assemblies, and each of the detonating assemblies is connected to the first detonating cord (22) via the corresponding second detonating cord (24); wherein each of the second detonating cords (24) is provided with the one-way explosion transmission device (3).

3. The blasting system according to claim 1, characterized in that: The blasting system comprises a plurality of the blasting subsystems; The blasting system also includes: A third detonating cord (23), wherein the plurality of blasting subsystems are connected to the blasting cap (1) via the third detonating cord (23), the plurality of blasting subsystems are sequentially arranged at intervals along the extension direction of the third detonating cord (23), and the one-way explosion transmission device (3) is arranged on the third detonating cord (23) between two adjacent blasting subsystems.

4. The blasting system according to claim 3, characterized in that: The blasting system also includes: A fourth detonating cord (21), wherein the detonating cap (1) is connected to the third detonating cord (23) via the fourth detonating cord (21); wherein the fourth detonating cord (21) is provided with the one-way explosion transmission device (3).

5. The blasting system according to any one of claims 1 to 4, characterized in that: The blasting detonator (1) is an electronic detonator.

6. The blasting system according to any one of claims 1 to 4, characterized in that: The one-way explosion transmission device (3) is a one-way explosion relay tube.

7. The blasting system according to any one of claims 1 to 4, characterized in that: The blasting system further comprises a waterproof structure, which is wound around the connection of the one-way explosion transmission device (3).

8. The blasting system according to any one of claims 1 to 4, characterized in that: The detonation assembly comprises: An explosive package (5) is used to be arranged in the blast hole (4), and the explosive package (5) is connected to the first detonating cord (22).

9. The blasting system according to claim 8, characterized in that: The detonation assembly also includes: A main charge (6) is used to be arranged in the blast hole (4) and wrapped around the outside of the detonating charge (5).

10. The blasting system according to claim 9, characterized in that: The detonation assembly also includes: A filling portion (7) is used to be arranged in the blast hole (4) and located on the top of the main charge (6).

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