CN111795623A - Low-cost high-reliability serial detonation method for digital detonator and detonating cord - Google Patents
Low-cost high-reliability serial detonation method for digital detonator and detonating cord Download PDFInfo
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- CN111795623A CN111795623A CN202010589079.1A CN202010589079A CN111795623A CN 111795623 A CN111795623 A CN 111795623A CN 202010589079 A CN202010589079 A CN 202010589079A CN 111795623 A CN111795623 A CN 111795623A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
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Abstract
A low-cost and high-reliability serial initiation method for a digital detonator and a detonating cord comprises the following blasting network schemes: the cutting holes, the auxiliary cutting holes, the first cutting hole, the second cutting hole and the peripheral holes are detonated by adopting intersegment differential initiation; blast holes in each section are detonated by hole-by-hole differential detonation; the specific connection method of the blasting network comprises the following steps: each section is provided with a high-precision detonating tube detonator in the blast hole according to the detonating sequence of the blast hole; the high-precision detonating tube detonators in each section of blast hole are connected in parallel through a detonating cord; wherein, the head end of the detonating cord of the cut hole is provided with a digital detonator; wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral hole are respectively provided with a digital detonator; the low-cost and high-reliability serial initiation method of the digital detonator and the detonating fuse has better blasting effect while reasonably controlling the construction cost, thereby having good comprehensive economic benefit and effectively reducing the mine roadway tunneling cost.
Description
Technical Field
The invention relates to the technical field of mine tunnel blasting construction, in particular to a low-cost and high-reliability serial detonation method of a digital detonator and a detonating fuse.
Background
Mine roadway development and excavation are indispensable parts in mine capital construction and production, and the use of blasting cap is indispensable in mine roadway development; the prior novel digital electronic detonator has the advantages of accurate delay time, no influence by section, large-scale networking and real-time online detection, and is widely applicable to blasting construction engineering in various complex environments; however, the digital detonator also has the disadvantage of high cost, and if the digital detonator is adopted in the mine roadway tunneling blasting construction, the mine roadway tunneling cost is increased, so that the problem that how to give full play to the advantages of the digital detonator and reduce the mine roadway tunneling cost is urgently needed to be solved is solved.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a low-cost high-reliability serial initiation method of a digital detonator and a detonating cord, which is applied to mine roadway smooth blasting tunneling construction, wherein blast holes required to be arranged comprise a hollow hole, a cut hole, an auxiliary cut hole, a circle of cut hole, two circles of cut holes, peripheral holes, bottom holes and ditch holes; the cutting hole, the auxiliary cutting hole, the first cutting hole, the second cutting hole, the peripheral hole and the bottom hole all comprise a plurality of blast holes; the blasting network scheme is as follows: the cutting holes, the auxiliary cutting holes, the first cutting hole, the second cutting hole and the peripheral holes are detonated by adopting intersegment differential initiation; blast holes in each section are detonated by hole-by-hole differential detonation; wherein the peripheral eye section also comprises a bottom eye and a ditch eye; the specific connection method of the blasting network comprises the following steps: high-precision detonating tube detonators are respectively arranged in the blastholes according to the detonating sequence of the blastholes in each section; the high-precision detonating tube detonators in each section of blast hole are connected in parallel through a detonating cord; wherein, the head end of the detonating cord of the cut hole is provided with a digital detonator; wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral hole are respectively provided with a digital detonator; the digital detonator is connected with an encoder through a lead, and the encoder is connected with an exploder through a lead; in the smooth blasting construction of the mine tunnel, hole-by-hole differential blasting is realized by utilizing high-precision detonating tube detonators in sections, and intersegment differential blasting is realized by utilizing digital detonators in sections, so that the damage of blasting construction to underground production equipment, facilities and peripheral tunnels is reduced, the collapse of surrounding rocks is reduced, the ore block rate is reduced, and the shoveling and transporting cost after blasting is reduced while the construction cost is reasonably controlled, therefore, the method has good comprehensive economic benefit and effectively reduces the tunneling cost of the mine tunnel.
In order to realize the purpose, the invention adopts the following technical scheme: a low-cost and high-reliability serial initiation method of a digital detonator and a detonating cord is applied to mine roadway smooth blasting tunneling construction, and blast holes required to be arranged comprise: an empty hole, a cut hole, an auxiliary cut hole, a circle of cut holes, two circles of cut holes, a peripheral hole, a bottom hole and a ditch hole; the cutting hole, the auxiliary cutting hole, the first cutting hole, the second cutting hole, the peripheral hole and the bottom hole all comprise a plurality of blast holes; the empty hole and the ditch hole are only provided with one blast hole; the blasting network scheme is as follows: the method comprises the following steps that inter-section differential detonation is adopted among the cutting holes, the auxiliary cutting holes, the first circle of cutting holes, the second circle of cutting holes and the peripheral holes, namely, delay time is set for the detonation time among the sections; the blastholes in each section are detonated by hole-by-hole differential detonation, namely, the detonation time between the blastholes in each section is provided with delay time; the peripheral eye section also comprises a bottom eye and a ditch eye, namely the peripheral eye, the bottom eye and the ditch eye are the same blasting section; the specific connection method of the blasting network comprises the following steps: high-precision detonating tube detonators are respectively arranged in the blastholes according to the blast hole detonating sequence in each section so as to realize hole-by-hole differential detonating in the sections; the high-precision detonating tube detonators in each section of blast hole are connected in parallel through a detonating cord; wherein, the head end of the detonating cord of the cut hole is provided with a digital detonator; the head and tail ends of the detonating fuse of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral holes are respectively provided with a digital detonator, so that the detonating reliability of each section is ensured; each section of detonating fuse is provided with a digital detonator so as to realize the differential detonation between the sections; the mixed mode of the digital detonator control section differential initiation and the high-precision detonating tube detonator control section hole-by-hole differential initiation is adopted, so that the advantage of the accurate time delay of the digital detonator is fully utilized, the advantage of the low cost of the high-precision detonating tube detonator is fully utilized, the blasting construction quality is ensured, and the lower mine roadway tunneling cost is ensured; when the digital detonator actually works, the digital detonator at the cut hole section is firstly detonated, the working reliability is higher, only one digital detonator is arranged at the cut hole section, but after the cut hole section is detonated, the digital detonators at other sections are all subjected to strong vibration, if the digital detonator has defects in the production process, such as a false welding problem, the digital detonator can possibly have a desoldering problem after being subjected to strong vibration, so that the digital detonator cannot work, and an explosion rejection accident is caused, and the purpose that the head and tail ends of the detonating cord of the auxiliary cut hole, the primary cut hole, the secondary cut hole and the peripheral holes are respectively provided with one digital detonator is to increase the reliability redundancy of the digital detonator so as to improve the reliability of serial detonating of the digital detonator and the detonating cord; the digital detonator is connected with an encoder through a lead, and the encoder is connected with an initiator through a lead.
Preferably, the blasting network scheme is as follows: the cutting holes, the auxiliary cutting holes, the first cutting hole, the second cutting hole and the peripheral holes are detonated by adopting intersegment differential initiation; wherein blast holes in each section of the undermining hole, the auxiliary undermining hole, the first circle of undermining hole and the second circle of undermining hole are detonated by hole-by-hole micro-difference; wherein blastholes in the peripheral hole section are simultaneously detonated; the purpose of simultaneous detonation is adopted in the peripheral hole sections, so that the blasting shock waves are fully utilized to generate tangential tensile stress between adjacent blastholes, the rock is made to generate a surrounding rock surface according to a preset curve, the amount of protruding rock on the surrounding rock surface after blasting is reduced, and the rework workload is reduced; the specific connection method of the blasting network comprises the following steps: wherein, high-precision detonating tube detonators are respectively arranged in the blast holes according to the blast hole detonating sequence in each section of the underholing hole, the auxiliary underholing hole, the first circle underholing hole and the second circle underholing hole so as to realize hole-by-hole differential detonating; wherein, each blast hole of the peripheral hole section is internally provided with a detonating tube detonator so as to realize simultaneous detonating; the high-precision detonating tube detonators or the detonating tube detonators in each section of blasting holes are connected in parallel through a detonating cord; wherein, the head end of the detonating cord of the cut hole is provided with a digital detonator; wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral hole are respectively provided with a digital detonator; the digital detonator is connected with an encoder through a lead, and the encoder is connected with an initiator through a lead.
Preferably, digital detonators are arranged in the first detonating blastholes of each section, and high-precision detonating tube detonators are respectively arranged in the blastholes of the rest blastholes according to the detonating sequence; the digital detonator in the first detonating blasting hole and the high-precision detonating tube detonators in the other blasting holes are connected in parallel through a detonating cord; wherein, the tail ends of the detonating cords of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral hole are also provided with a digital detonator; the digital detonator is used for replacing the original high-precision detonating tube detonators in the first detonating blastholes of all sections, so that the use amount and the construction amount of the high-precision detonating tube detonators can be reduced, and the mine roadway tunneling cost is further reduced.
Furthermore, the delay time of the digital detonators in the same section of the auxiliary cutting hole, the first cutting hole, the second cutting hole and the peripheral hole is the same; the delay time of the digital detonators between adjacent sections of the cutting hole, the auxiliary cutting hole, the first circle of cutting hole, the second circle of cutting hole and the peripheral hole is 70-100 milliseconds, and the delay time is longer, so that the full generation of rock cracks in the previous section of blasting is ensured, more free surfaces are formed in blast holes in the next section of blasting, and less rock mass rate is achieved while blasting vibration is reduced; the delay time of the high-precision detonating tube detonators in each section of the cutting hole, the auxiliary cutting hole, the first cutting hole, the second cutting hole and the peripheral hole is delayed for 9-15 milliseconds in sequence according to the detonation sequence, and the delay time is short, so that the superposition of blasting shock waves among holes can be well utilized, and the blasting energy utilization rate is high.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a low-cost high-reliability serial initiation method of a digital detonator and a detonating cord, which is applied to mine tunnel smooth blasting tunneling construction, wherein blast holes required to be arranged comprise a hollow hole, a cut hole, an auxiliary cut hole, a circle of cut hole, two circles of cut holes, a peripheral hole, a bottom hole and a ditch hole; the cutting hole, the auxiliary cutting hole, the first cutting hole, the second cutting hole, the peripheral hole and the bottom hole all comprise a plurality of blast holes; the blasting network scheme is as follows: the cutting holes, the auxiliary cutting holes, the first cutting hole, the second cutting hole and the peripheral holes are detonated by adopting intersegment differential initiation; blast holes in each section are detonated by hole-by-hole differential detonation; wherein the peripheral eye section also comprises a bottom eye and a ditch eye; the specific connection method of the blasting network comprises the following steps: high-precision detonating tube detonators are respectively arranged in the blastholes according to the detonating sequence of the blastholes in each section; the high-precision detonating tube detonators in each section of blast hole are connected in parallel through a detonating cord; wherein, the head end of the detonating cord of the cut hole is provided with a digital detonator; wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole, the first cut hole, the second cut hole and the peripheral hole are respectively provided with a digital detonator; the digital detonator is connected with an encoder through a lead, and the encoder is connected with an exploder through a lead; in the smooth blasting construction of the mine tunnel, hole-by-hole differential blasting is realized by utilizing high-precision detonating tube detonators in sections, and intersegment differential blasting is realized by utilizing digital detonators in sections, so that the damage of blasting construction to underground production equipment, facilities and peripheral tunnels is reduced, the collapse of surrounding rocks is reduced, the ore block rate is reduced, and the shoveling and transporting cost after blasting is reduced while the construction cost is reasonably controlled, therefore, the method has good comprehensive economic benefit and effectively reduces the tunneling cost of the mine tunnel.
Drawings
FIG. 1 is a schematic view of a smooth blasting blasthole arrangement in roadway construction;
FIG. 2 is a first scenario of a blasting network;
FIG. 3 is a second blasting network scenario;
fig. 4 shows arrangement of smooth blasting blastholes and a charging meter in roadway construction.
In the figure: 1. an empty eye; 2. cutting out a slotted hole; 3. auxiliary slotting; 4. a circle of slotted holes; 5. two circles of cutting holes are formed; 6. peripheral eyes; 7. a bottom eye; 8. a ditch hole; 10. a detonating cord; 11. high precision detonator with detonating tube; 12. a digital detonator; 13. a nonel detonator; 14. an encoder; 15. an initiator.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The first embodiment is as follows:
a low-cost and high-reliability serial initiation method of a digital detonator and a detonating cord is applied to mine roadway smooth blasting tunneling construction, and blast holes required to be arranged comprise: the device comprises an empty hole 1, a cut hole 2, an auxiliary cut hole 3, a circle of cut hole 4, two circles of cut holes 5, a peripheral hole 6, a bottom hole 7 and a ditch hole 8; the cutting holes 2 comprise four blast holes, the auxiliary cutting holes 3 comprise nine blast holes, one circle of cutting holes 4 comprises eleven blast holes, two circles of cutting holes 5 comprise seventeen blast holes, the peripheral holes 6 comprise twenty-three blast holes, the bottom holes 7 comprise eight blast holes, and the ditch holes comprise one blast hole; the blasting network scheme is as follows: the method is characterized in that intersegment differential detonation is adopted among the cutting holes 2, the auxiliary cutting holes 3, the first-circle cutting holes 4, the second-circle cutting holes 5 and the peripheral holes 6, and the delay time is 80 milliseconds; blast holes in each section are detonated by hole-by-hole differential detonation, and the delay is sequentially carried out for 10 milliseconds; wherein the peripheral eye 6 section also comprises a bottom eye 7 and a ditch eye 8; the specific connection method of the blasting network comprises the following steps: each section is provided with a high-precision detonating tube detonator 11 in the blasthole according to the detonating sequence of the blasthole; the high-precision detonating tube detonators 11 in each section of blast hole are connected in parallel through a detonating cord 10; wherein, the head end of a detonating cord 10 of the cut hole 2 is provided with a digital detonator 12; wherein, the head and tail ends of the detonating cord of the auxiliary cut hole 3, the first circle of cut hole 4, the second circle of cut hole 5 and the peripheral hole 6 are respectively provided with a digital detonator 12; the digital detonator 12 is connected with an encoder 14 through a lead, and the encoder 14 is connected with an initiator 15 through a lead;
the specific delay time of 2-section digital detonators in the cutting hole is set to be 0ms, the specific delay time of 3-section digital detonators in the auxiliary cutting hole is set to be 120ms, the specific delay time of 4-section digital detonators in one cutting hole is set to be 290ms, the specific delay time of 5-section digital detonators in two cutting holes is set to be 480ms, the specific delay time of 6-section digital detonators in peripheral holes is set to be 630ms, and the total blasting time is 860 ms.
Example two:
a low-cost and high-reliability serial initiation method of a digital detonator and a detonating cord is applied to mine roadway smooth blasting tunneling construction, and blast holes required to be arranged comprise: the device comprises an empty hole 1, a cut hole 2, an auxiliary cut hole 3, a circle of cut hole 4, two circles of cut holes 5, a peripheral hole 6, a bottom hole 7 and a ditch hole 8; the cutting holes 2 comprise four blast holes, the auxiliary cutting holes 3 comprise nine blast holes, one circle of cutting holes 4 comprises eleven blast holes, two circles of cutting holes 5 comprise seventeen blast holes, the peripheral holes 6 comprise twenty-three blast holes, the bottom holes 7 comprise eight blast holes, and the ditch holes comprise one blast hole; the blasting network scheme is as follows: the method is characterized in that intersegment differential detonation is adopted among the cutting holes 2, the auxiliary cutting holes 3, the first-circle cutting holes 4, the second-circle cutting holes 5 and the peripheral holes 6, and the sequential delay time is 80 milliseconds; wherein blast holes in each section of the underholing hole 2, the auxiliary underholing hole 3, the first-circle underholing hole 4 and the second-circle underholing hole 5 are detonated by hole-by-hole differential, and the delay time is 10 milliseconds in sequence; wherein, the blastholes in 6 sections of the peripheral holes are simultaneously detonated; wherein the peripheral eye 6 section also comprises a bottom eye 7 and a ditch eye 8; the specific connection method of the blasting network comprises the following steps: digital detonators 12 are arranged in the first detonating blastholes in the sections of the undermining holes 2, the auxiliary undermining holes 3, the first circle of undermining holes 4 and the second circle of undermining holes 5, and high-precision detonating tube detonators 11 are arranged in the blastholes of the rest blastholes according to the detonating sequence; the digital detonator 12 in the first detonating blasting hole and the high-precision detonating tube detonators 11 in the other blasting holes are connected in parallel through a detonating cord 10; a digital detonator 12 is arranged in the first detonating blasthole in the section 6 of the peripheral hole, and a detonating tube detonator 13 is respectively arranged in the rest blastholes; the digital detonator 12 in the first detonating blasting hole and the detonating tube detonators 13 in the other blasting holes are connected in parallel through a detonating cord 10; wherein, the tail ends of the detonating cord of the auxiliary cut hole 3, the first cut hole 4, the second cut hole 5 and the peripheral hole 6 are also provided with a digital detonator 12; the digital detonator 12 is connected with an encoder 14 through a lead, and the encoder 14 is connected with an initiator 15 through a lead;
the specific delay time of 2-section digital detonators in the cutting hole is set to be 0ms, the specific delay time of 3-section digital detonators in the auxiliary cutting hole is set to be 120ms, the specific delay time of 4-section digital detonators in one circle is set to be 290ms, the specific delay time of 5-section digital detonators in two circles is set to be 480ms, the specific delay time of 6-section digital detonators in peripheral holes is set to be 630ms, and the total blasting time is 630 ms.
The present invention is not described in detail in the prior art.
Claims (4)
1. A low-cost and high-reliability serial initiation method of a digital detonator and a detonating cord is applied to mine roadway smooth blasting tunneling construction, and blast holes required to be arranged comprise: the device comprises an empty hole (1), a cut hole (2), an auxiliary cut hole (3), a circle of cut hole (4), two circles of cut holes (5), a peripheral hole (6), a bottom hole (7) and a ditch hole (8); the cutting holes (2), the auxiliary cutting holes (3), the first cutting hole (4), the second cutting hole (5), the peripheral holes (6) and the bottom holes (7) all comprise a plurality of blast holes; the method is characterized in that: the blasting network scheme is as follows: the cutting holes (2), the auxiliary cutting holes (3), the first cutting hole (4), the second cutting hole (5) and the peripheral holes (6) are detonated by intersegment differentiation; blast holes in each section are detonated by hole-by-hole differential detonation; wherein the peripheral eye (6) section also comprises a bottom eye (7) and a ditch eye (8); the specific connection method of the blasting network comprises the following steps: high-precision detonating tube detonators (11) are respectively arranged in the blastholes according to the blast hole detonating sequence in each section; the high-precision detonating tube detonators (11) in each section of blast hole are connected in parallel through a detonating cord (10); wherein, the head end of the detonating cord (10) of the cut hole (2) is provided with a digital detonator (12); wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole (3), the first cut hole (4), the second cut hole (5) and the peripheral hole (6) are respectively provided with a digital detonator (12); the digital detonator (12) is connected with an encoder (14) through a lead, and the encoder (14) is connected with an initiator (15) through a lead.
2. The low-cost high-reliability serial initiation method of the digital detonator and the detonating cord according to claim 1, characterized in that: the blasting network scheme is as follows: the cutting holes (2), the auxiliary cutting holes (3), the first cutting hole (4), the second cutting hole (5) and the peripheral holes (6) are detonated by intersegment differentiation; wherein blast holes in each section of the undermining hole (2), the auxiliary undermining hole (3), the first circle of undermining hole (4) and the second circle of undermining hole (5) are detonated by hole-by-hole differential initiation; wherein blast holes in the peripheral hole (6) section are simultaneously detonated; the specific connection method of the blasting network comprises the following steps: wherein, the sections of the undermining hole (2), the auxiliary undermining hole (3), the first-circle undermining hole (4) and the second-circle undermining hole (5) are arranged according to the blast hole detonation sequence, and high-precision detonating tube detonators (11) are respectively arranged in the blast holes; wherein, each blast hole of the peripheral hole (6) section is internally provided with a detonating tube detonator (13); the high-precision detonating tube detonators (11) or detonating tube detonators (13) in each section of blast holes are connected in parallel through a detonating cord (10); wherein, the head end of the detonating cord (10) of the cut hole (2) is provided with a digital detonator (12); wherein, the head and tail ends of the detonating fuse of the auxiliary cut hole (3), the first cut hole (4), the second cut hole (5) and the peripheral hole (6) are respectively provided with a digital detonator (12); the digital detonator (12) is connected with an encoder (14) through a lead, and the encoder (14) is connected with an initiator (15) through a lead.
3. The low-cost high-reliability serial initiation method of the digital detonator and the detonating cord according to claim 1, characterized in that: a digital detonator (12) is arranged in the first detonating blasthole in each section, and high-precision detonating tube detonators (11) are respectively arranged in the blastholes of the rest blastholes according to the detonating sequence; the digital detonator (12) in the first detonating blasting hole and the high-precision detonating tube detonators (11) in the other blasting holes are connected in parallel through a detonating cord (10); wherein, the tail ends of the detonating cord of the auxiliary cut hole (3), the first cut hole (4), the second cut hole (5) and the peripheral hole (6) are also provided with a digital detonator (12).
4. The low-cost high-reliability serial initiation method of the digital detonator and the detonating cord according to claim 1 or 2, characterized in that: the delay time of the auxiliary cut hole (3), the primary cut hole (4), the secondary cut hole (5) and the peripheral hole (6) in the same section of the digital detonator (12) is the same; the delay time of the digital detonator (12) between adjacent sections of the cutting hole (2), the auxiliary cutting hole (3), the first cutting hole (4), the second cutting hole (5) and the peripheral hole (6) is 70-100 milliseconds; the delay time of the high-precision detonating tube detonators (11) in each section of the cutting hole (2), the auxiliary cutting hole (3), the first-circle cutting hole (4), the second-circle cutting hole (5) and the peripheral hole (6) is delayed for 9-15 milliseconds in sequence according to the detonation sequence.
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| CN112747645A (en) * | 2021-01-11 | 2021-05-04 | 中国华冶科工集团有限公司 | Medium-deep hole detonation network connecting device and method thereof |
| CN112857158A (en) * | 2020-12-31 | 2021-05-28 | 中国华冶科工集团有限公司 | Deep hole initiation device and initiation method |
| CN113587756A (en) * | 2021-08-30 | 2021-11-02 | 中国人民解放军陆军工程大学 | Multi-point detonation source differential delay detonation simulation device |
| CN113702438A (en) * | 2021-08-30 | 2021-11-26 | 中国人民解放军陆军工程大学 | Synchronous detonation simulation device for multi-point detonation source |
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| CN112857158A (en) * | 2020-12-31 | 2021-05-28 | 中国华冶科工集团有限公司 | Deep hole initiation device and initiation method |
| CN112747645A (en) * | 2021-01-11 | 2021-05-04 | 中国华冶科工集团有限公司 | Medium-deep hole detonation network connecting device and method thereof |
| CN113587756A (en) * | 2021-08-30 | 2021-11-02 | 中国人民解放军陆军工程大学 | Multi-point detonation source differential delay detonation simulation device |
| CN113702438A (en) * | 2021-08-30 | 2021-11-26 | 中国人民解放军陆军工程大学 | Synchronous detonation simulation device for multi-point detonation source |
| CN113724569A (en) * | 2021-08-31 | 2021-11-30 | 中国人民解放军陆军工程大学 | Underwater multipoint detonation source differential delay detonation simulation device |
| CN113870678A (en) * | 2021-08-31 | 2021-12-31 | 中国人民解放军陆军工程大学 | Large-equivalent underground multipoint time-delay blasting bomb pit effect simulation device and method |
| CN115307499A (en) * | 2022-08-03 | 2022-11-08 | 中铁四局集团有限公司 | Structure and method for excavating tunnel by using digital electronic detonator and detonating index explosive |
| CN115307499B (en) * | 2022-08-03 | 2023-08-25 | 中铁四局集团有限公司 | Structure and method for excavating tunnel by detonating explosive with digital electronic detonator and detonating cord |
| CN115355783A (en) * | 2022-09-21 | 2022-11-18 | 中钢集团武汉安全环保研究院有限公司 | Digital electronic detonator and detonating cord fused roadway excavation delay detonating network |
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