A remote misfired charge secondary detonation system and its blasting method

Abstract

The present application relates to a remote secondary detonation system for misfires and a blasting method thereof, which includes a number of blast holes arranged on a mine platform and blasting bodies arranged in each blast hole. The system further includes a first detonation mechanism, a first detonating fuse, and a second detonation mechanism arranged outside the blast hole for each blasting body. Each of the blasting bodies is provided with a plugging section, an explosive component, a first initiating component and a first booster component arranged in the explosive component. The plugging section is arranged at one end of the blasting body close to the blast hole. A conductive tube is arranged between the first booster component and the second detonation mechanism. One end of the first detonating fuse is connected to the first detonation mechanism, and the other end of the first detonating fuse is provided with a detonating tube connected to each first initiating component. A second detonating fuse is arranged between the first booster component and the first initiating component. The present application detonates misfires remotely again through a blasting method, so as to reduce the occurrence rate of misfires.

Description

Technical Field

[0001] This application relates to the field of blasting treatment, and in particular to a remote misfire secondary detonation system and its blasting method. Background Art

[0002] Blasting is a technology that utilizes the compression, loosening, destruction, throwing, and killing effects generated by the explosion of explosives in air, water, soil-rock media, or objects to achieve the desired purpose. When a charge or explosive charge explodes in soil-rock media or structures, it causes phenomena such as compression, deformation, destruction, loosening, and throwing of the soil-rock media or structures, and is mainly used in earthwork projects, as well as the demolition of metal buildings and structures, etc.

[0003] Currently, for blasting in mine exploitation, it is generally medium-deep hole open-pit bench blasting. First, a drilling machine is used to drill deep blast holes on the mountain bench, then explosives and detonators are loaded into the blast holes, and finally, the blast holes are filled to prepare the blasting area in a parallel operation mode. After the entire blasting area is formed, it is detonated by unified connection.

[0004] When filling the blast holes, generally, plugging materials such as rock powder and clay are used. However, the plugging materials may become wet or freeze into large blocks on the surface, resulting in problems such as pinching, squeezing, and pulling of the connection between the detonating fuse and the detonator, making the detonating fuse unable to detonate the detonator normally, thus causing misfires. Once misfires occur, it will have a serious impact on the safety of personnel and equipment and the construction progress. Summary of the Invention

[0005] In order to improve the problem of misfires caused by the inability to detonate explosives, this application provides a remote misfire secondary detonation system.

[0006] A remote misfire secondary detonation system provided by this application adopts the following technical solution: It includes a number of blast holes arranged on a mine platform and blasting bodies arranged in each blast hole, and further includes a first detonation mechanism, a first detonating fuse, and a second detonation mechanism arranged outside the blast hole for each blasting body. Each of the blasting bodies includes a plugging section, an explosive component, a first booster component, and a first initiating component arranged in the explosive component. The plugging section is arranged at one end of the blasting body close to the blast hole. A conductive tube is arranged between the first booster component and the second detonation mechanism. One end of the first detonating fuse is connected to the first detonation mechanism, and the other end of the first detonating fuse is provided with a detonating tube connected to each first initiating component. A second detonating fuse is arranged between the first booster component and the first initiating component. The second detonation mechanism is provided with a delay mechanism, and the delay mechanism drives the starting time of the second detonation mechanism to be later than the starting time of the first detonation mechanism.

[0007] By adopting the above technical solution, the explosive component is detonated by the first detonating component, and the first detonating component is ignited in two ways. One way is to ignite the first detonating tube by the first detonating mechanism, and the blasting wave of the first detonating tube detonates the first detonating component, thereby detonating the explosive component; the second detonating mechanism detonates the first explosive transfer component through the conductive tube, thereby igniting the second detonating tube, and the blasting wave of the second detonating tube ignites the first detonating component, thereby detonating the explosive component. When the first detonating mechanism fails to detonate the explosive component, the second detonating mechanism is used to detonate the explosive, achieving the effect of secondary detonation of misfires, thereby reducing the final occurrence rate of misfires.

[0008] Preferably, the second detonating mechanism includes a frame body, a first battery component, a second battery component and an insulating plate arranged in the frame body. The negative electrode of the first battery component is arranged opposite to the positive electrode of the second battery component with a gap therebetween. One end of the insulating plate vertically penetrates through the gap. A spring conductive sheet is arranged on the side of the second battery component away from the insulating plate. The delay mechanism moves the insulating plate and makes the other end of the insulating plate pass through the gap. In the frame body, there are placement frames for fixing the first battery component and the second battery component respectively. A conductive copper piece is arranged on the side of the insulating plate away from the gap.

[0009] By adopting the above technical solution, an electric current is supplied to the conductive tube by the connection of the first battery component and the second battery component. The gap provided between the first battery component and the second battery component makes the second detonating mechanism in a non-powered state. After the delay mechanism moves the insulating plate out of the gap, the insulating plate is separated from the first battery component. The spring conductive sheet will push the second battery component towards the first battery component, so that the negative electrode of the first battery contacts the positive and negative electrodes of the second battery component to generate electricity, thereby realizing the delayed conduction of the second detonating mechanism and improving the safety of secondary detonation of misfires; the first battery component and the second battery component are fixedly arranged, and the gap between them makes them in a power-off state. When the limiting plate descends, the conductive copper piece moves between the first battery component and the second battery component and is in a powered state, improving the stability of power-on.

[0010] Preferably, the delay mechanism includes a limiting plate and an airbag. The limiting plate is arranged at the lower ends of the first battery component and the second battery component. One end of the insulating plate located in the gap is connected to the limiting plate. The airbag is arranged below the limiting plate, and the airbag is provided with an air outlet.

[0011] By adopting the above technical solution, the automatic lifting operation of the limiting plate is realized by the slow outflow of the gas in the airbag. The structure is simple, the cost is reduced, and the operation is convenient.

[0012] Preferably, the explosive member includes a primary explosive zone, a plugging section, and a secondary explosive zone arranged in sequence from the plugging section to the bottom of the blast hole. The first initiating member is arranged in the primary explosive zone, a second initiating member is arranged in the secondary explosive zone, and a detonating member is arranged between the second initiating member and the first initiating member.

[0013] By adopting the above technical solution, the explosive zone is set into two. The first initiating member near the plugging section detonates first, detonates the second initiating member through the detonating member, and detonates the secondary explosive zone through the second initiating member, thereby performing secondary blasting on the mountain body. The first detonation can reduce the generation of large boulders at the top of the mountain body.

[0014] Preferably, the detonating member includes a second detonating tube arranged between the second initiating member and the first initiating member. The first transfer member is arranged in the plugging section. One end of the second detonating tube is communicated with the first transfer member, and the other end is communicated with a third detonating tube.

[0015] By adopting the above technical solution, when the second detonating tube successfully detonates the first initiating member, the first initiating member can also successfully ignite the third detonating tube. After the second initiating member is detonated through the third detonating tube, the secondary explosive zone is detonated; when the second detonating tube fails to successfully detonate the first initiating member, the first initiating member and the second initiating member are respectively detonated through the first transfer member.

[0016] Preferably, the detonating member includes a second transfer member, a spraying member, and a firing pin arranged in sequence between the first initiating member and the second transfer member. The second transfer member is arranged at one end of the secondary explosive zone close to the plugging section. A fourth detonating tube is arranged between the second transfer member and the second initiating member. The spraying member is provided with a vertically penetrating air cavity, and the firing pin is provided with a needle head vertically facing the second transfer member.

[0017] By adopting the above technical solution, the second transfer member is used to ignite the fourth detonating tube, detonates the second initiating member through the third detonating tube, and the spraying member is used for the diversion of the shock wave generated when the first initiating member detonates. The shock wave drives the firing pin to instantaneously impact the second transfer member, thereby igniting the fourth detonating tube.

[0018] Preferably, a nozzle is arranged on one side of the spraying member close to the firing pin. A gap is arranged on the side surface of the nozzle. An impact bead is clamped in the nozzle. An arc-shaped groove is arranged at one end of the firing pin close to the nozzle.

[0019] By adopting the above technical solution, the pushing force on the firing pin is increased through the impact bead. After the impact bead shoots out and is embedded in the arc-shaped groove, it continues to push the firing pin to move towards the second transfer member, thereby preventing the problem that the firing pin has insufficient force to detonate the second transfer member.

[0020] Preferably, a support frame is provided between the secondary explosive area and the plugging section. The support frame includes an upper plate, a lower plate, and a second spring member disposed between the upper plate and the lower plate. The firing pin is fixed to the upper plate, the lower plate is fixed to the secondary explosive area, and the lower plate is provided with a through hole for the firing pin to pass through.

[0021] By adopting the above technical solution, the firing pin is limited by the support frame at a certain distance from the second booster, and the second spring member is used for the upper plate to move downward relative to the lower plate, further improving the impact direction stability of the firing pin.

[0022] Preferably, the explosive member is provided with a first housing, the second detonation mechanism is provided with a second housing, one end of the first housing is connected to the second housing, the other end of the first housing is of a sealed structure, one end of the conductive tube penetrates through the second housing and is connected to the second detonation mechanism, the other end of the conductive tube penetrates through the first housing and is connected to the explosive member, a buffer chamber is provided in the first housing and is located on the side of the conductive tube away from the explosive member, and a shock absorption mechanism is provided in the buffer chamber of the first housing.

[0023] By adopting the above technical solution, if the first detonation causes deformation of the ground, which will cause extrusion problems to the unexploded blasting body, then the buffer mechanism can reduce the extrusion force and play a role in protecting the conductive tube, further ensuring the effect of secondary detonation.

[0024] A blasting method for a remote misfire secondary detonation system, the blasting method includes the following steps:

[0025] Blasting preparation: Dig a plurality of blast holes on the mine platform, bury blasting bodies in each blast hole, connect the detonation ends of each blasting body to the first detonation mechanism through the first detonating tube, and the operator remotely starts the first detonation mechanism through the controller in the safety area;

[0026] Primary detonation: Start the controller. The striker of the first detonation mechanism impacts the detonating tube of the first detonating tube through the blasting busbar, so that the first detonating tube is ignited. The ignited first detonating tube detonates the first initiator, thereby detonating the explosive in the primary explosive area. The shock wave generated by the detonation enters the ejection member, pushes the impact bead out of the nozzle, and the impact bead separated from the nozzle shoots towards the firing pin. After the firing pin is instantaneously impacted by the impact bead, the tip of the firing pin instantaneously impacts the second booster, so that the second booster is detonated, thereby igniting the fourth detonating tube, and then detonating the second initiator through the fourth detonating tube, and finally detonating the explosive in the secondary explosive area;

[0027] Secondary detonation: If the first detonating fuse fails to detonate the first initiating component successfully, the second detonating mechanism is opened. First, the gas in the airbag of the second detonating mechanism flows out. The conductive copper part is located between the first battery part and the second battery part. The second detonating mechanism detonates the first booster through the conductive pipe. The first booster ignites the second detonating fuse, and the first initiating component is detonated through the second detonating fuse, thereby detonating the explosive in the primary explosive area. The shock wave generated by the detonation enters the ejection part, pushes the impact bead out of the nozzle, and the impact bead separated from the nozzle shoots towards the firing pin. After the firing pin is instantaneously impacted by the impact bead, the tip of the firing pin instantaneously impacts the second booster, causing the second booster to be detonated, thereby igniting the fourth detonating fuse, and then the second initiating component is detonated through the fourth detonating fuse, and finally the explosive in the secondary explosive area is detonated.

[0028] By adopting the above technical solution, the problem of misfires caused by the failure of the explosive to detonate is improved, the safety of personnel and equipment is enhanced, and the construction progress is also increased.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] By controlling a total of the first detonating mechanism to detonate multiple blasting bodies simultaneously, each blasting body is provided with two detonating mechanisms. The first detonating mechanism conducts the first detonation on the explosive component in the blasting body. If there is a misfire after the first detonation, the second detonating mechanism is used to conduct the second detonation on the explosive component in the blasting body again, thereby realizing remote secondary detonation of misfires, reducing the occurrence rate of misfires, reducing the workload of manual post-treatment of misfires, with a simple method and safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the structural diagram of the present invention in the working state.

[0032] Figure 2 is the structural schematic diagram of Embodiment 1 of the present invention.

[0033] Figure 3 is the structural sectional view of the second detonating mechanism in Embodiment 1 of the present invention.

[0034] Figure 4 is the explosion schematic diagram of the second detonating mechanism in Embodiment 1 of the present invention.

[0035] Figure 5 is the structural schematic diagram of Embodiment 2 of the present invention.

[0036] Figure 6 is the structural schematic diagram of Embodiment 3 of the present invention.

[0037] Figure 7 is the present invention Figure 6 The enlarged schematic diagram of part A.

[0038] Figure 8 It is a schematic structural diagram of the second detonating mechanism in the present invention.

[0039] Figure 9 It is a schematic structural diagram of Embodiment 4 in the present invention.

[0040] Explanation of reference numerals: 1, blasting body; 111, first housing; 1111, inner housing; 1112, outer housing; 112, second housing; 2, plugging section; 3, explosive member; 31, primary explosive zone; 32, partition plugging section; 33, secondary explosive zone; 4, first initiating member; 41, non-electric detonator; 42, initiating explosive charge; 5, first detonating transmission member; 6, first detonating mechanism; 61, initiating needle; 62, blasting busbar; 63, firing device; 64, controller; 7, first detonating fuse; 8, second detonating mechanism; 81, frame body; 82, first battery member; 83, second battery member; 84, insulating plate; 85, delay mechanism; 8521, limiting plate; 8522, airbag; 8523, air outlet; 8524, flow control valve; 86, conductive copper member; 87, placement frame body; 88, spring conductive sheet; 9, second detonating fuse; 10, conductive pipe; 11, detonating pipe; 12, second initiating member; 13, third detonating fuse; 14, spraying member; 15, firing needle; 16, second detonating transmission member; 17, fourth detonating fuse; 18, nozzle; 19, gap; 20, impact bead; 21, arc-shaped groove; 22, support frame; 221, upper plate; 222, lower plate; 223, second spring member; 224, through hole; 23, mine platform; 24, ventilation cavity; 25, conductive sheet; 26, buffer chamber; 27, first buffer sponge member; 28, second buffer sponge member; 29, first limiting abutting portion; 30, second limiting abutting portion; 34, buffer snap ring; 341, first elastic portion; 342, second elastic portion; 343, third elastic portion; 344, fourth elastic portion. Detailed implementation manners

[0041] The following further elaborates on the present application Figure 1-9 in conjunction with the attached drawings.

[0042] Embodiment 1

[0043] Referring to Figure 1 as shown, a remote misfire secondary detonation system includes a first detonating mechanism 6, a first detonating fuse 7, a controller 64, and a plurality of blasting bodies 1 arranged in sequence. Each blasting body 1 is embedded in a blast hole on a mine platform 23. One end of the first detonating fuse 7 is a detonation end, and the first detonating mechanism 6 is cooperatively arranged at the detonation end of the first detonating fuse 7. A first detonating pipe 11 is connected between the other end of the first detonating fuse 7 and each blasting body 1.

[0044] The first detonating mechanism 6 includes a detonating needle 61, a blasting busbar 62, a detonator 63 and a controller 64. The two ends of the blasting busbar 62 are respectively connected to the detonating needle and the detonator 63. The detonator 63 is a general starting device. Through the blasting busbar 62, the detonating needle 61 detonates the detonating end of the first detonating fuse 7, and then ignites the first detonating fuse 7. Finally, the first detonating fuse 7 detonates each blasting body 1 through each first detonating tube 11. The controller 64 is a remote controller. A remote communication module is provided in the detonator 63. The remote controller controls the opening and closing of the detonator 63 through the remote communication module. Calculate the distance of the mining platform 23, so as to plan the distance between each blast hole, and then work on the mining platform through a drilling machine.

[0045] Refer to Figure 2 As shown, each blasting body 1 includes a first housing 111 disposed in the blast hole and a second housing 112 disposed outside the blast hole. A plugging section 2 and an explosive member 3 are sequentially arranged in the first housing 111 from the end close to the second housing 112 to the other end. At one end of the explosive member 3 far from the plugging section 2, a first initiating member 4 and a first detonating transmission member 5 are installed. The first initiating member 4 includes a detonating charge packet 42 and a non-electric detonator 41 disposed in the detonating charge packet. A second detonating fuse 9 is connected between the first detonating transmission member 5 and the non-electric detonator 41. The first detonating transmission member 5 is an electric igniter head. A conductive tube 10 is connected between the first detonating transmission member 5 and the second detonating mechanism 8.

[0046] Refer to Figure 3 and Figure 4 As shown, the second detonating mechanism 8 is installed in the second housing 112. The conductive tube 10 is located in the first housing 111. One end of the conductive tube 10 penetrates through the second housing 112 and is connected to the current output end of the second detonating mechanism 8, and the other end penetrates out of the first housing 111 and is connected to the first detonating transmission member 5. The second detonating mechanism 8 includes a frame body 81, a first battery member 82, a second battery member 83 and an insulating plate 84 installed in the frame body 81. The negative electrode of the first battery member 82 is arranged opposite to the positive electrode of the second battery member 83 with a gap 19 therebetween. A conductive sheet 25 is provided between the first battery member 82 and the frame body 81, and a spring conductive sheet 88 is provided between the second battery member 83 and the frame body 81. A placement frame body 87 for fixing the first battery member 82 and the second battery member 83 is installed in the frame body 81. The placement frame body 87 divides the frame body 81 into an upper cavity and a lower cavity.

[0047] Refer to Figure 3 and Figure 4As shown, the second detonating mechanism 8 is provided with a delay mechanism 85 and is located in the lower cavity. The delay mechanism 85 drives the start time of the second detonating mechanism 8 to be later than that of the first detonating mechanism 6. The delay mechanism 85 includes a limit plate 8521 and an airbag 8522. The limit plate 8521 is arranged between the airbag 8522 and the insulating plate 84, and the limit plate 8521 can move up and down through the airbag 8522. One end of the insulating plate 84 is connected to the limit plate 8521, and the other end of the insulating plate 84 vertically passes through the gap 19 and is located in the upper cavity. A conductive copper piece 86 is installed at the end of the insulating plate 84 located in the upper cavity. An air outlet 8523 communicating with the airbag 8522 is provided on the second housing 112, and a flow control valve 8524 is provided at the air outlet 8523. The flow rate of the gas output from the airbag 8522 is adjusted through the flow control valve 8524, so that the limit plate 8521 can slowly descend, thereby driving the insulating plate 84 to slowly fall.

[0048] Referring to Figure 3 and Figure 4 As shown, when the airbag 8522 is in a sealed state, the insulating area of the insulating plate 84 close to the limit plate 8521 is between the first battery part 82 and the second battery. When the gas in the airbag 8522 slowly flows out, the insulating plate 84 gradually descends; when all the gas in the airbag 8522 has flowed out, the conductive copper piece 86 is just located between the first battery part 82 and the second battery part 83, so that the second detonating mechanism 8 delivers current to the conductive tube 10.

[0049] The implementation principle of the first embodiment of this application is as follows: After opening the flow control valve 8524 of each blasting body 1, the operator remotely starts the detonator 63 through the controller 64 in the safe area. The detonator 63 impacts the detonating tube 11 of the first detonating tube 7 through the blasting bus 62, so that the first detonating tube 7 is ignited.

[0050] If the first detonating tube 7 successfully detonates the non-electric detonator 41, after the non-electric detonator 41 detonates the first priming charge 42, the explosive member 3 is detonated through the first priming charge 42;

[0051] If the first detonating tube 7 fails to detonate the first detonating member 4, when all the gas in the airbag 8522 is output, the conductive copper piece 86 is located between the first battery part 82 and the second battery part 83 and forms a current detonation method. The second detonating mechanism 8 detonates the first priming charge 42 twice through the conductive tube 10, and finally detonates the explosive member 3 through the first priming charge 42.

[0052] Embodiment Two

[0053] Referring to Figure 5As shown in the figure, a secondary detonation system for remote misfires is different from that of the first embodiment in that the explosive member 3 includes a primary explosive zone 31, a plugging section 32, and a secondary explosive zone 33 that are sequentially arranged from the plugging section 2 to the bottom of the blast hole. The area of the primary explosive zone 31 is similar to the area of the plugging section 2. The primary explosive zone 31 is an auxiliary explosive charge for small-scale blasting first to reduce the generation of large boulders at the top of the mountain.

[0054] Referring to Figure 5 As shown in the figure, the first detonator 5 and the second detonating fuse 9 are located in the plugging section 32. A second initiator 12 and a detonating member are provided in the secondary explosive zone 33. The second initiator 12 is located at one end of the secondary explosive zone 33 away from the plugging section 32. One end of the second detonating fuse 9 is connected to the first detonator 5, and the other end communicates with the part of the third detonating fuse 13 located in the plugging section 32. The second initiator 12 has the same structure as the first initiator 4. The detonating member includes a third detonating fuse 13. One end of the third detonating fuse 13 is connected to the first initiator 4, and the other end penetrates through the plugging section 32 and is connected to the second initiator 12.

[0055] The implementation principle of the second embodiment of this application is as follows: After opening the flow control valve 8524 of each blasting body 1, the operator starts the detonator 63 through a remote controller in the safe area. The detonator 63 uses the blasting bus 62 to impact the detonating tube 11 of the first detonating fuse 7 with the detonating needle 61, causing the first detonating fuse 7 to be ignited.

[0056] If the first detonating fuse 7 successfully detonates the non-electric detonator 41, when the non-electric detonator 41 of the first initiator 4 detonates the first primary explosive charge 42, it also ignites the third detonating fuse 13; after the explosion, the first initiator 4 also detonates the explosive in the primary explosive zone 31. The length of the third detonating fuse 13 is similar to the depth of the secondary explosive zone 33. Therefore, after the explosion of the primary explosive zone 31, the third detonating fuse 13 needs to burn for a period of time and then detonates the second non-electric detonator 41 of the second initiator 12. Through the second non-electric detonator 41, the second primary explosive charge 42 is detonated, and finally the explosive in the secondary explosive zone 33 is detonated.

[0057] If the first detonating fuse 7 fails to detonate the first initiator 4 successfully, when all the gas in the airbag 8522 flows out, the second detonation mechanism 8 detonates the first detonator 5 through the conductive tube 10. The first detonator 5 ignites the third detonating fuse 13, and detonates the first initiator 4 and the second initiator 12 respectively through the third detonating fuse 13. The first initiator 4 detonates the primary explosive zone 31 first, and after a period of time, the second initiator 12 detonates the secondary explosive zone 33.

[0058] Embodiment Three

[0059] Referring to Figure 6As shown, a remote blind gun secondary detonation system is different from the second embodiment in that the first explosive transmission component 5 is arranged in the primary explosive area 31, one end of the second detonating tube 9 is connected to the first explosive transmission component 5, and the other end is connected to the non-electric detonator 41 of the first explosive component 4. A second explosive transmission component 16 and a fourth detonating tube 17 are arranged on one side of the secondary explosive area 33 close to the plug section 32. The second explosive transmission component 16 is a fire cap component, and one end of the fourth detonating tube 17 is connected to the fire cap component, and the other end is connected to the second explosive component 12.

[0060] Reference Figure 7 and Figure 8 As shown, a groove is provided at one end of the diaphragm section 32 close to the primary explosive area 31, one end of the first detonating member 4 is embedded in the groove, and a detonating member for detonating the second detonating member 12 is provided in the diaphragm section 32, and the detonating member includes an injection member 14, a firing pin 15 and a support frame 22. A channel groove is provided in the diaphragm section 32 vertically located between the first detonating member 4 and the second detonating member 16, and the injection member 14 and the firing pin 15 are respectively arranged in the channel groove from top to bottom. A vertical ventilation cavity 24 is provided in the injection member 14. An impact bead 20 is provided in the injection member 14, and a nozzle 18 is provided at one end of the injection member 14 close to the firing pin 15. The firing pin 15 is arranged between the nozzle 18 and the second detonating member 16 through the support frame 22, and an arc-shaped groove 21 for engaging the impact bead 20 is provided at one end of the firing pin 15 close to the nozzle 18, and the needle head of the firing pin 15 faces the first detonating member 5.

[0061] Reference Figure 7 and Figure 8 As shown, the support frame 22 includes an upper plate 221, a lower plate 222 and a second spring member 223. The upper plate 221 is located at the lower end of the diaphragm section 32, and the firing pin 15 is fixed to the upper plate 221. The lower plate 222 is located at the upper end of the secondary explosive area 33, and the lower plate 222 is provided with a through hole 224 for the firing pin 15 to pass through. A plurality of second spring members 223 can be provided and are located between the upper plate 221 and the lower plate 222. When the second spring member 223 is in the initial state, the firing pin 15 is separated from the second explosive transmission member 16 by a certain distance.

[0062] Reference Figure 7 and Figure 8 As shown, the nozzle 18 is an inverted cone body connected to the injection member 14, and the diameter of the impact bead 20 is larger than the lower end opening of the nozzle 18, so that the impact bead 20 is stuck at the nozzle 18, and two gaps 19 extending from the injection member 14 are symmetrically provided on the side of the nozzle 18, so that the lower end surface of the nozzle 18 can be expanded under the action of external force, so that the impact bead 20 can be ejected.

[0063] The implementation principle of the third embodiment of this application is as follows: When the first detonating fuse 7 detonates the first initiating component 4, the shock wave of the first initiating component 4 enters the ejecting component 14 and pushes the impact bead 20 out of the nozzle 18. If the first detonating fuse 7 fails to detonate the first initiating component 4, the first initiating component 4 is detonated through the first detonating transmission component 5; the impact bead 20 separated from the nozzle 18 shoots towards the firing pin 15. After the firing pin 15 is instantaneously impacted by the impact bead 20, the tip of the firing pin 15 instantaneously impacts the second detonating transmission component 16, causing the second detonating transmission component 16 to be detonated, thereby igniting the fourth detonating fuse 17. Then, the second initiating component 12 is detonated through the fourth detonating fuse 17, and finally the explosive in the secondary explosive area 33 is detonated.

[0064] Embodiment Four

[0065] Refer to Figure 9 As shown, when multiple blasting bodies 1 are used simultaneously, there will be problems in the first blasting that affect the non - blasted blasting bodies 1, such as flying objects, ground deformation, etc. In this embodiment, a vibration - damping mechanism is provided in the first housing 111. The first housing 111 is provided with a buffer chamber 26, and the length of the buffer chamber 26 is at least the distance from the plugging section 2 to the secondary explosive area 33. The vibration - damping mechanism is arranged in the buffer chamber 26, aiming to protect the detonation structure at the position of the conductive tube 10 and reduce the influence on the effect of the second detonation after the external extrusion of the position of the conductive tube 10. The second housing 112 is filled with a second buffer sponge member 28, and the second detonation mechanism 8 is embedded in the second buffer sponge member 28. The conductive tube 10 penetrates through the second buffer sponge member 28 and enters the first housing 111, aiming to protect the second detonation mechanism 8.

[0066] Refer to Figure 9 As shown, the first housing 111 includes an inner housing 1111 and an outer housing 1112. The inner housing 1111 wraps around the outside of the plugging section 2 and the secondary explosive area 33, and the outer housing 1112 wraps around the outside of the inner housing 1111. One end of the outer housing 1112 is connected to the second housing 112, and a protruding first limiting abutting portion 29 is provided on the inner side surface of the other end. A protruding portion is provided on the outer surface of the inner housing 1111 to form a concave second limiting abutting portion 30. The first limiting abutting portion 29 is buckled into the second limiting abutting portion 30 to form the buffer chamber 26. The entire vibration - damping mechanism includes a first buffer sponge member 27 and a buffer snap ring 34. The first buffer sponge member 27 is located on the side of the buffer chamber 26 close to the second housing 112. One end of the buffer snap ring 34 is inserted into the first buffer sponge member 27, and the other end of the buffer snap ring 34 is located on the side of the buffer chamber 26 close to the surface of the second limiting abutting portion 30.

[0067] Refer to Figure 9As shown, the buffer snap ring 34 includes a first elastic portion 341, a second elastic portion 342, a third elastic portion 343, and a fourth elastic portion 344 that are connected in sequence and are of an integrally formed structure. The first elastic portion 341 is inserted into the first buffer sponge member 27. The second elastic portion 342 inclines towards the outer housing 1112, forming an obtuse angle with the first elastic portion 341 in the direction towards the outer housing 1112. The third elastic portion 343 inclines towards the inner housing 1111, forming an obtuse angle with the third elastic portion 343 in the direction towards the inner housing 1111. The connection between the second elastic portion 342 and the third elastic portion 343 is an arc structure. The fourth elastic portion 344 is a similar U-shaped structure with an opening facing the direction of the second housing 112. The side portions of the fourth elastic portion 344 are respectively attached to the outer side surface of the inner housing 1111 and the first limiting abutting portion 29 of the outer housing 1112.

[0068] Referring Figure 9 As shown, under normal circumstances, as shown in the state of the specification drawings, the buffer snap ring 34 is in a state where no deformation occurs; when the part of the outer housing 1112 where the first buffer sponge member 27 is provided is subjected to an inward extrusion, the first buffer sponge member 27 weakens the extrusion force and plays a protective role; when the part of the outer housing 1112 where the buffer snap ring 34 is provided is subjected to an inward extrusion, since one end of the buffer snap ring 34 is fixed by the first buffer sponge member 27 and the other end has a certain distance space from the outer housing 1112, the buffer snap ring 34 will deform, thereby buffering the extrusion force and playing a protective role.

[0069] A blasting method for a remote misfire secondary detonation system, the blasting method includes the following. Blasting preparation: Dig a plurality of blast holes in the mine platform 23, bury a blasting body 1 in each blast hole, connect the detonation end of each blasting body 1 to the first detonation mechanism 6 through the first detonating tube 7, and the operator remotely starts the first detonation mechanism 6 in the safe area through the controller 64;

[0070] Primary detonation: Start the controller 64. The striker 63 of the first detonation mechanism 6 hits the detonator 11 of the first detonating tube 7 through the blasting busbar 62, so that the first detonating tube 7 is ignited. The ignited first detonating tube 7 detonates the first initiating member 4, thereby detonating the explosives in the primary explosive area 31. The shock wave generated by the detonation enters the ejection member 14, pushes the impact bead 20 out of the nozzle 18, and the impact bead 20 separated from the nozzle 18 shoots towards the firing pin 15. After the firing pin 15 is instantaneously impacted by the impact bead 20, the tip of the firing pin 15 instantaneously impacts the second transfer explosive member 16, so that the second transfer explosive member 16 is detonated, thereby igniting the fourth detonating tube 17, and then detonating the second initiating member 12 through the fourth detonating tube 17, and finally detonating the explosives in the secondary explosive area 33;

[0071] Secondary detonation: If the first detonator tube 7 fails to detonate the first initiating component 4 successfully, the second detonation mechanism 8 is opened. First, the gas in the airbag 8522 of the second detonation mechanism 8 flows out. The conductive copper part 86 is located between the first battery part 82 and the second battery part 83. The second detonation mechanism 8 detonates the first booster 5 through the conductive tube 10. The first booster 5 ignites the second detonator tube 9, and detonates the first initiating component 4 through the second detonator tube 9, thereby detonating the explosive in the primary explosive area 31. The shock wave generated by the detonation enters the ejection part 14, pushes the impact bead 20 out of the nozzle 18. The impact bead 20 separated from the nozzle 18 shoots towards the firing pin 15. After the firing pin 15 is instantaneously impacted by the impact bead 20, the tip of the firing pin 15 instantaneously impacts the second booster 16, causing the second booster 16 to be detonated, thereby igniting the fourth detonator tube 17, and then detonating the second initiating component 12 through the fourth detonator tube 17, and finally detonating the explosive in the secondary explosive area 33.

[0072] The above are all the preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A remote misfired charge secondary detonation system, comprising a plurality of blast holes arranged on a mine platform (23) and blasting bodies (1) arranged in each blast hole, characterized in that: It further includes a first detonation mechanism (6), a first detonating fuse (7), and a second detonation mechanism (8) provided outside the blast hole for each blasting body (1). Each of the blasting bodies (1) includes a plugging section (2), an explosive component (3), a first detonating transmission component (5), and a first initiating component (4) provided in the explosive component (3). The plugging section (2) is provided at one end of the blasting body (1) close to the blast hole. A conductive tube (10) is provided between the first detonating transmission component (5) and the second detonation mechanism (8). One end of the first detonating fuse (7) is connected to the first detonation mechanism (6), and the other end of the first detonating fuse (7) is provided with a detonating tube (11) connected to each first initiating component (4). A second detonating fuse (9) is provided between the first detonating transmission component (5) and the first initiating component (4). The second detonation mechanism (8) is provided with a delay mechanism (85), and the delay mechanism (85) drives the start time of the second detonation mechanism (8) to be later than the start time of the first detonation mechanism (6).

2. The secondary detonation system for remote blind cartridges according to claim 1, characterized in that: The second detonation mechanism (8) includes a frame body (81), a first battery component (82), a second battery component (83), and an insulating plate (84) provided in the frame body (81). The negative electrode of the first battery component (82) is arranged opposite to the positive electrode of the second battery component (83) with a gap (19) therebetween. One end of the insulating plate (84) is vertically penetrated through the gap (19). A spring conductive sheet (88) is provided on the side of the second battery component (83) away from the insulating plate (84). The delay mechanism (85) moves the insulating plate (84) and makes the other end of the insulating plate (84) pass through the gap (19). Placement frame bodies (87) for fixing the first battery component (82) and the second battery component (83) are respectively provided in the frame body (81). A conductive copper piece (86) is provided on the side of the insulating plate (84) away from the gap (19).

3. The secondary detonation system for remote misfires according to claim 2, wherein: The delay mechanism (85) includes a limit plate (8521) and an airbag (8522). The limit plate (8521) is provided at the lower ends of the first battery component (82) and the second battery component (83). One end of the insulating plate (84) located in the gap (19) is connected to the limit plate (8521). The airbag (8522) is provided below the limit plate (8521), and the airbag (8522) is provided with an air outlet (8523).

4. A secondary detonation system for remote blind cartridges according to claim 1, characterized in that: The explosive component (3) includes a primary explosive zone (31), a partition plugging section (32), and a secondary explosive zone (33) arranged in sequence from the plugging section (2) to the bottom of the blast hole. The first initiating component (4) is provided in the primary explosive zone (31). A second initiating component (12) is provided in the secondary explosive zone (33), and a detonating transmission component is provided between the second initiating component (12) and the first initiating component (4).

5. The secondary detonation system for remote misfires according to claim 4, characterized in that: The detonating transmission component includes a third detonating fuse (13) provided between the second initiating component (12) and the first initiating component (4). The first detonating transmission component (5) is provided in the partition plugging section (32). One end of the second detonating fuse (9) communicates with the first detonating transmission component (5), and the other end communicates with the third detonating fuse (13).

6. The secondary detonation system for remote misfires according to claim 4, characterized in that: The detonating member includes a second detonating charge member (16), a spraying member (14) and a firing pin (15) sequentially arranged between the first initiating member (4) and the second detonating charge member (16). The second detonating charge member (16) is arranged at one end of the secondary explosive area (33) close to the plugging section (32). A fourth detonating fuse (17) is arranged between the second detonating charge member (16) and the second initiating member (12). The spraying member (14) is provided with a vertically penetrating ventilation cavity (24), and the firing pin (15) is provided with a needle head vertically facing the second detonating charge member (16).

7. The secondary detonation system for remote blind cartridges according to claim 6, characterized in that: One side of the spraying member (14) close to the firing pin (15) is provided with a nozzle (18). A gap (19) is arranged on the side surface of the nozzle (18). An impact bead (20) is clamped in the nozzle (18). One end of the firing pin (15) close to the nozzle (18) is provided with an arc-shaped groove (21).

8. A secondary detonation system for remote blind cartridges according to claim 7, characterized in that: A support frame (22) is arranged between the secondary explosive area (33) and the plugging section (32). The support frame (22) includes an upper plate (221), a lower plate (222) and a second spring member (223) arranged between the upper plate (221) and the lower plate (222). The firing pin (15) is fixed to the upper plate (221), and the lower plate (222) is provided with a through hole (224) for the firing pin (15) to penetrate through to the second detonating charge member (16).

9. The secondary detonation system for remote misfires according to claim 1, wherein: The explosive member (3) is provided with a first housing (111), and the second detonating mechanism (8) is provided with a second housing (112). One end of the first housing (111) is connected to the second housing (112), and the other end of the first housing (111) is of a sealed structure. One end of the conductive tube (10) penetrates through the second housing (112) and is connected to the second detonating mechanism (8), and the other end of the conductive tube (10) penetrates through the first housing (111) and is connected to the first detonating charge member (5). A buffer chamber (26) is arranged in the first housing (111) and is located on the side of the conductive tube (10) away from the explosive member (3). A damping mechanism is arranged in the first housing (111) in the buffer chamber (26).

10. A blasting method for the remote misfired secondary detonation system according to claim 7 or 8, the blasting method comprising the following steps Blasting preparation: Dig a plurality of blast holes on the mine platform. A blasting body is buried in each blast hole. The detonating ends of each blasting body are connected to the first detonating mechanism through the first detonating fuse. The operator remotely starts the first detonating mechanism through the controller in the safe area; Primary detonation: Start the controller. The striker of the first detonating mechanism impacts the detonating tube of the first detonating fuse through the blasting bus bar, so that the first detonating fuse is ignited. The ignited first detonating fuse detonates the first initiating member, thereby detonating the explosive in the primary explosive area. The shock wave generated by the detonation enters the spraying member, pushes the impact bead out of the nozzle, and the impact bead separated from the nozzle shoots towards the firing pin. After the firing pin is instantaneously impacted by the impact bead, the needle head of the firing pin instantaneously impacts the second detonating charge member, so that the second detonating charge member is detonated, thereby igniting the fourth detonating fuse, and then detonating the second initiating member through the fourth detonating fuse, and finally detonating the explosive in the secondary explosive area; Secondary detonation. If the first detonating fuse fails to detonate the first initiating component, the second detonation mechanism is opened, allowing the gas in the airbag of the second detonation mechanism to flow out first. The conductive copper part is located between the first battery part and the second battery part. The second detonation mechanism detonates the first booster through the conductive tube. The first booster ignites the second detonating fuse, and the first initiating component is detonated through the second detonating fuse, thereby detonating the explosives in the primary explosive area. The shock wave generated by the detonation enters the ejection part, pushing the impact bead out of the nozzle. The impact bead that has separated from the nozzle shoots towards the firing pin. After the firing pin is instantaneously impacted by the impact bead, the tip of the firing pin instantaneously impacts the second booster, causing the second booster to be detonated, thereby igniting the fourth detonating fuse. Then, the second initiating component is detonated through the fourth detonating fuse, and finally, the explosives in the secondary explosive area are detonated.

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