CN116358368A - Medium-length hole/large-diameter deep hole detonation method - Google Patents
Medium-length hole/large-diameter deep hole detonation method Download PDFInfo
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- CN116358368A CN116358368A CN202310288668.XA CN202310288668A CN116358368A CN 116358368 A CN116358368 A CN 116358368A CN 202310288668 A CN202310288668 A CN 202310288668A CN 116358368 A CN116358368 A CN 116358368A
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- hole
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- stope
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005474 detonation Methods 0.000 title claims abstract description 19
- 238000005422 blasting Methods 0.000 claims abstract description 38
- 238000005065 mining Methods 0.000 claims abstract description 14
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 239000002360 explosive Substances 0.000 description 6
- 238000004880 explosion Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
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Classifications
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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
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a medium-length hole/large-diameter deep hole stope detonating method, which comprises the following steps of: charging the powder into the blast hole to a specified height from the hole opening after the drilling of the blast hole is completed; paving two in-hole detonating cords extending out of the hole openings in each blast hole at intervals; filling the powder to finish plugging the blast hole; configuring two detonating cords which are arranged left and right in the starting section for each row of gun holes; connecting the hole detonating cords at two sides of each row of blasting holes to a detonating cord respectively; a digital electronic detonator is respectively connected with the initial sections of the two detonating fuse of each row; the digital electronic detonators connected with the detonating fuse of each row are intensively connected to a detonating digital electronic detonator; and connecting the detonation digital electronic detonator to the detonator to realize detonation. For a large-diameter deep hole stope, after the drill of the stope blastholes is completed, two in-hole detonating cords are paved on the whole length of each blasthole, and other steps refer to a medium-length deep hole stope. The reliable and effective stope blasting can be ensured, and the economical efficiency of stope blasting mining can be ensured.
Description
Technical Field
The invention belongs to the field of underground mining, and particularly relates to a medium-deep hole/large-diameter deep hole detonation method.
Background
In order to ensure the safety, accuracy and reliability of stope mining blasting in the past, when large-diameter deep hole blasting is adopted to collapse stope ores, a double-blasting detonating tube detonator or detonating cord (for out-hole booster) and a double-blasting detonating tube detonator (for detonation and delay) +two detonating cords (for in-hole booster) are generally adopted to form a duplex detonation network; when medium-length hole blasting mining is adopted, a duplex detonation network is usually formed by combining an out-hole single detonating tube detonator, two detonating cables and an in-hole double detonating tube detonator (delay) +a single detonating cable. The detonation network is complex in connection, the number of used detonators is large, and the cost is high.
With increasingly strict safety supervision on mine blasting materials, digital electronic detonators are introduced into mine stope blasting in more places, and detonating tube detonators in the detonation network are replaced by digital electronic detonators. Although the digital electronic detonator has the technical advantages of safety, reliability, convenient supervision and the like, the economic efficiency is poor, the price is 6-10 times higher than that of the detonating tube detonator, and the price is generally 30-60 yuan/fire. Taking the underground segmented medium-length hole stope blasting as an example, the cost of 900-1800 yuan is increased by one row according to the average of 20 holes, and the ton ore cost is increased by about 0.9-1.8 yuan. Due to the high price of blasting materials, the mining blasting cost is greatly improved, and the economic benefit of mines is restricted. In addition, the digital electronic detonator is high in price, so that the application and popularization of the digital electronic detonator in mine mining explosion ore breaking are limited.
Disclosure of Invention
The invention aims to provide a medium-deep hole/large-diameter deep hole stope detonation method which can ensure reliable and effective stope blasting and good stope blasting mining economy.
The invention provides a detonation method for a medium-length hole/large-diameter deep hole stope, which comprises the following steps:
1. mining field for medium-length holes
(1) After the drill of the stope blast hole is finished, charging the blast hole to a position with a designated height from the hole opening;
(2) Paving two in-hole detonating cords in each blast hole of each row of blast holes at intervals;
(3) Continuously charging and sealing the blast hole, wherein the detonating cord in the hole extends out of the hole opening for a specified length;
(4) Two detonating cords are arranged for each row of the gun holes, and the initial sections of the two detonating cords are arranged left and right;
(5) Connecting the hole detonating cords at two sides of each row of blasting holes to a detonating cord respectively;
(6) A digital electronic detonator is respectively connected with the initial sections of the two detonating fuse of each row;
(7) The digital electronic detonators connected with the detonating fuse of each row are intensively connected to a detonating digital electronic detonator;
(8) Connecting the detonation digital electronic detonator to the detonator, and controlling the detonator to detonate;
2. aiming at large-diameter deep hole stope
After the drill holes of the stope are drilled, two detonating cords in the holes are paved on the whole length of each hole, and the other steps refer to the medium-length hole stope.
When the method is implemented, the explosive fuse in the hole begins to be paved when the blast hole of the medium-length hole stope is charged to be 5-8m away from the hole.
When the method is implemented, the detonating cord in the hole is paved on the whole length of the blast hole of the large-diameter deep hole stope.
When the method is implemented, when the detonating cords in the holes are paved in the large-diameter deep holes, the two detonating cords in the holes are separated by the spacing rod and are simultaneously sent into the holes.
When the method is implemented, the detonating cord in the hole is exposed out of the hole by at least 100mm.
When the method is implemented, during stope blasting, the digital electronic detonators in the subsequent row are delayed by one to more than two sections compared with the digital electronic detonators in the previous row.
According to the invention, two detonating cords are arranged in each blast hole, the two in-row detonating cords are respectively connected with one in-hole detonating cord of each hole, and then the initial sections of the detonating cords are respectively connected with a digital electronic detonator, namely, a 'double-insurance' detonating network of the in-hole double detonating cords, the out-row inner hole double detonating cords and the double-shot digital electronic detonator is adopted, so that the blasting technical requirement of the inter-row delay of the stope blasting mining is reserved, and the safety, reliability and effectiveness of the stope blasting mining are ensured. In addition, by adjusting the in-hole delay to be out-of-hole delay and using detonating cord with lower price to perform in-hole detonation and out-of-hole booster, each hole is not used for containing 2 digital electronic detonators, so that a large number of in-hole digital electronic detonators are saved, about 40 digital electronic detonators can be saved by calculating according to about 20 holes in each row, and the blasting cost of a stope when the digital electronic detonators are adopted is reduced by about 0.9-1.8 yuan/t; the method can save 270-540 ten thousand yuan according to the calculation of 300 ten thousand tons of ore per year. In general, the stope blasting network connection method reduces the number of digital electronic detonators, innovates the blasting network connection on the premise of ensuring the safety, reliability, accuracy and effectiveness of stope blasting, reduces the stope blasting cost, and achieves the purpose of safe, reliable and low-cost mining of medium-deep hole or large-diameter deep hole stope blasting. In addition, the application and popularization of the digital electronic detonator in domestic mines can be promoted.
Drawings
FIG. 1 is a schematic view of a row interconnect for a medium-length hole stope blasting network according to the present invention.
Fig. 2 is a schematic view of the charge and detonating cord placement of the single blast hole of fig. 1.
FIG. 3 is a schematic view of a row interconnect for a large diameter deep hole stope blasting network according to the present invention.
Fig. 4 is a schematic view of the single blast hole charge and detonating cord deployment of fig. 3.
FIG. 5 is a schematic diagram of the links between rows of a stope blasting network according to the present invention.
Number in the figure:
1-explosive;
2-an in-hole detonating cord;
3-stemming;
4-in-row explosion conducting detonating cord;
5-digital electronic detonator;
6-detonating the digital electronic detonator;
7-an initiator.
Detailed Description
Embodiment one, this embodiment is directed to a medium length hole stope.
As shown in fig. 1, 2 and 5, the method disclosed in this embodiment includes the following steps:
1. explosive charge for blast hole in row and detonating cord in laying hole
(1) After the drill holes of the stope are drilled, explosive loading devices or explosive loading trolleys are adopted to load explosive 1 into each hole to a position 5m away from the hole opening;
(2) The explosion-proof cables 2 in the holes are paved, two explosion-proof cables are paved in each blast hole, and in order to ensure that the two explosion-proof cables have the largest distance, the two explosion-proof cables in the holes are respectively arranged at two sides of the same diameter surface of the blast hole as far as possible;
(3) After the continuous charging is completed, the stemming 3 is used for blocking the blasthole, and the detonating cord 2 in the hole passes through the stemming 3 and extends out of the blasthole by at least 100mm so as to facilitate the binding connection operation of the detonating cord in the hole and the detonating cord;
(4) Two explosion conducting detonating cords 4 are arranged for each row of the gun holes, and the starting sections of the two explosion conducting detonating cords are arranged left and right;
(5) The detonating cords 2 in the holes exposed at the two sides of the hole opening of each row of the gun holes are respectively bound and connected to a detonating cord 4, so that the inner explosion is conveniently discharged;
(6) A digital electronic detonator 5 is respectively connected with the initial sections of the two detonating fuse of each row;
(7) The digital electronic detonators 5 connected to the two sides of each row of detonating fuse 4 are intensively connected to a detonating digital electronic detonator 6;
(8) And connecting the detonation digital electronic detonator to the detonator, and detonating the stope blasting network according to the detonator at a safe site. During blasting, the second row is required to be delayed by more than one to two sections compared with the first row of digital electronic detonators, and the subsequent rows are analogized.
Embodiment two, the embodiment is directed to a large-diameter deep hole stope
As shown in fig. 3, 4 and 5, the difference between the present embodiment and the first embodiment is that: two in-hole detonating cords 2 are paved in the whole length of the blast hole, and because the blast hole has larger diameter and deeper depth, in order to facilitate the paving of the in-hole detonating cords, a mode of separating the two in-hole detonating cords through thin bamboo poles and simultaneously conveying the two in-hole detonating cords into the blast hole is adopted, namely, the thin bamboo poles are used as interval supports of the two in-hole detonating cords.
Firstly, paving two non-contact hole detonating cords in each blast hole in a row, and exposing the hole detonating cords to a certain length of an orifice; binding and connecting each detonating cord in each blast hole of the row from left to right and from right to left by adopting two rows of inner detonating cord, and binding a digital electronic detonator on the initial sections of the two rows of inner detonating cord; then, the two digital electronic detonators of each row are intensively bound on the one-shot digital electronic detonator; and finally, connecting the detonation digital electronic detonator to an exploder, and controlling detonation through the exploder.
It is apparent that the above method has the following advantages:
the in-hole detonating cord is connected with the detonating cord, the in-hole detonating cord is used for conducting in-row detonating, the in-hole delay is adjusted to be out-of-hole delay, the in-hole detonating cord and the detonating cord are conventional detonating cords with lower prices, and a digital electronic detonator is arranged at one end of each row of two detonating cords, so that the consumption is small, the cost is reduced by greatly blasting, and the technical requirements of inter-row delay blasting mining are reserved.
The double-insurance connection mode of the two detonating cords and the double-firing digital electronic detonator in and out the hole can ensure the safety, accuracy, reliability and effectiveness of the blasting network.
In summary, the method reduces the number of digital electronic detonators and the blasting cost of the digital electronic detonators of the stope on the premise of ensuring the reliable and effective blasting of the stope, and achieves the safe, reliable and low-cost mining of medium-deep hole or large-diameter deep hole stope blasting.
Claims (6)
1. A medium-length hole/large-diameter deep hole stope detonation method comprises the following steps:
1. mining field for medium-length holes
(1) After the drill of the stope blast hole is finished, charging the blast hole to a position with a designated height from the hole opening;
(2) Paving two in-hole detonating cords in each blast hole of each row of blast holes at intervals;
(3) Continuously charging and sealing the blast hole, wherein the detonating cord in the hole extends out of the hole opening for a specified length;
(4) Two detonating cords are arranged for each row of the gun holes, and the initial sections of the two detonating cords are arranged left and right;
(5) Connecting the hole detonating cords at two sides of each row of blasting holes to a detonating cord respectively;
(6) A digital electronic detonator is respectively connected with the initial sections of the two detonating fuse of each row;
(7) The digital electronic detonators connected with the detonating fuse of each row are intensively connected to a detonating digital electronic detonator;
(8) Connecting the detonation digital electronic detonator to the detonator, and controlling the detonator to detonate;
2. aiming at large-diameter deep hole stope
After the drill holes of the stope are drilled, two detonating cords in the holes are paved on the whole length of each hole, and the other steps refer to the medium-length hole stope.
2. The medium-length/large-diameter deep hole stope detonating method according to claim 1, wherein: and when the blast hole of the medium-length hole stope is charged to 5-8m from the orifice, the detonating cord in the hole is paved.
3. The medium-length/large-diameter deep hole stope detonating method according to claim 1, wherein: and (5) paving detonating cords in the holes in the whole length of the blast holes of the large-diameter deep hole stope.
4. A medium-length/large-diameter deep-hole stope detonating method according to claim 3, characterized in that: when the detonating cords in the holes are paved in the large-diameter deep holes, the two detonating cords in the holes are separated by the spacing rod and are simultaneously sent into the holes.
5. The medium-length/large-diameter deep hole stope detonating method according to claim 1, wherein: the detonating cord in the hole is exposed out of the aperture by at least 100mm.
6. The medium-length/large-diameter deep hole stope detonating method according to claim 2, wherein: when the stope is blasted, the digital electronic detonator of the subsequent row is delayed by one to more than two sections compared with the digital electronic detonator of the previous row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288668.XA CN116358368A (en) | 2023-03-23 | 2023-03-23 | Medium-length hole/large-diameter deep hole detonation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288668.XA CN116358368A (en) | 2023-03-23 | 2023-03-23 | Medium-length hole/large-diameter deep hole detonation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116358368A true CN116358368A (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310288668.XA Pending CN116358368A (en) | 2023-03-23 | 2023-03-23 | Medium-length hole/large-diameter deep hole detonation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116358368A (en) |
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2023
- 2023-03-23 CN CN202310288668.XA patent/CN116358368A/en active Pending
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