CN209623525U - The steel for shot structure of roadway development blasting - Google Patents

The steel for shot structure of roadway development blasting Download PDF

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Publication number
CN209623525U
CN209623525U CN201821966829.7U CN201821966829U CN209623525U CN 209623525 U CN209623525 U CN 209623525U CN 201821966829 U CN201821966829 U CN 201821966829U CN 209623525 U CN209623525 U CN 209623525U
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China
Prior art keywords
blasthole
hole
emptying aperture
central charge
loaded
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Application number
CN201821966829.7U
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Chinese (zh)
Inventor
杨闯
蒋文利
吴永强
李成斌
王宝文
罗业民
庞博
齐朝鹏
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Hebei Iron and Steel Group Mining Co Ltd
HBIS Co Ltd
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HBIS Co Ltd
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Abstract

The utility model discloses a kind of steel for shot structures of roadway development blasting comprising keyhole and auxiliary blasthole;The keyhole is to be drilled with loaded hole and emptying aperture (3) in driving face;The loaded hole includes that a central charge blasthole (1) and 4~5 surrounding loaded holes (2), central charge blasthole (1) are located at the center in drift section slotting area;Emptying aperture (3) quantity is 6~8, and emptying aperture (3) is arranged circumferentially around central charge blasthole (1);The surrounding charging hole (2) is arranged in the outer periphery position in emptying aperture region.This blasthole structure makes full use of minimum burden principle, the structure of central charge blasthole, surrounding loaded hole and emptying aperture designs, the broken scope of freedom and broken swollen space of slotting can be increased using sequence detonation, to form deeper vallecular cavity, improve blasting efficiency and onepull depth, excavation cost is reduced, blast hole utilizing factor is up to 90% or more.

Description

The steel for shot structure of roadway development blasting
Technical field
The utility model belongs to well lane engineering blasting technique field, especially a kind of steel for shot knot of roadway development blasting Structure.
Background technique
Since well lane engineering excavated section is smaller, working space is narrow, and is Single free-face, and the clamping action of explosion compares Greatly, the difficulty of explosion is larger.Due to keyhole explosion first, second scope of freedom is created for via hole explosion, so slotting The demolition effect in hole is the key that the efficient explosion of roadway.In the design of pervious keyhole, keyhole has various forms, such as wedge shape Slotting, cone cut, burn cut etc..But the arrangement form and data of explosive filled due to keyhole are less reasonable, as a result often make Satisfied requirement is not achieved in design, and the blast hole utilizing factor of explosion is average 60%~70% or so, seriously affects well lane engineering and excavates effect Rate.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of blasthole cloth of roadway development blasting that blasting efficiency is high Set structure.
In order to solve the above technical problems, technical solution adopted in the utility model is: it includes keyhole and auxiliary gun Hole;The keyhole is to be drilled with loaded hole and emptying aperture in driving face;The loaded hole includes a central charge big gun Hole and 4~5 surrounding loaded holes, central charge blasthole are located at the center in drift section slotting area;The emptying aperture quantity It is 6~8, emptying aperture is arranged circumferentially around central charge blasthole;The surrounding charging hole is arranged in the outer of emptying aperture region Side periphery position.
Deep 200~the 300mm of depth of the hole depth rate auxiliary blasthole of keyhole described in the utility model.
The aperture of keyhole described in the utility model is 40~42mm.
The hole of emptying aperture described in the utility model and central charge blasthole in the heart away from being 100~150mm, surrounding loaded hole and The hole of central charge blasthole is in the heart away from for 150~200mm.
Emptying aperture described in the utility model is 6, and the upper and lower and two sides of central charge blasthole are located in regular hexagon;The week Enclosing loaded hole is 4, and the upper and lower and left and right sides in the enclosed regular hexagon region of emptying aperture is located in prismatic.
Central charge blasthole described in the utility model is incorporated with the explosive of detonation, opposite centered on central charge blasthole to set The two surrounding loaded holes set be around one group, two groups loaded hole be respectively charged into the delayed ignition pack that is delayed according to this and Explosive.
The beneficial effects of adopting the technical scheme are that the utility model makes full use of minimum burden former Reason, the structure design of central charge blasthole, surrounding loaded hole and emptying aperture can increase the broken of slotting using sequence detonation The scope of freedom and broken swollen space keep conventional auxiliary blasthole, the depth of conventional periphery blasthole effective to form deeper vallecular cavity It utilizes, improves blasting efficiency and onepull depth, reduce excavation cost, obtain considerable economic benefit.The utility model exists Good demolition effect is all achieved in applying in underground mine engineer, blast hole utilizing factor is up to 90% or more.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the structural schematic diagram of the utility model;
Fig. 2 is the charge constitution schematic diagram of the utility model.
In figure: central charge blasthole 1;Surrounding loaded hole 2;Emptying aperture 3.
Specific embodiment
Shown in Fig. 1, the steel for shot structure of this roadway development blasting includes keyhole, auxiliary blasthole and periphery blasthole.Institute The vertical Drilling of keyhole is stated in driving face, includes 5 loaded holes and 6 emptying apertures 3, the loaded hole includes 1 Central charge blasthole 1 and 4 surrounding loaded hole 2;The aperture of the keyhole is 40~42mm, and the hole depth rate of keyhole is auxiliary Deep 200~the 300mm of the depth of blasthole is helped, keyhole hole depth is 2.40~2.55m, and via hole hole depth is 2.25m or so.In described Heart loaded hole 1 is located at the center in drift section slotting area, and 6 emptying apertures 3 are around the circumferentially uniform cloth of central charge blasthole It sets, is located at the upper and lower of central charge blasthole 1, upper left, upper right, lower-left and bottom-right location, form regular hexagon shape;Institute The hole of emptying aperture 3 and central charge blasthole 1 is stated in the heart away from being 100~150mm.4 surrounding loaded holes 2 are located at 6 The upper and lower, left and right position in the formed regular hexagon region of a emptying aperture 3, forms the prismatic structure that length, left and right are short up and down, and surrounding fills The hole of medicine blasthole 2 and central charge blasthole 1 is in the heart away from for 150~200mm.The surrounding loaded hole 2 can also be set as needed It is 5,3 quantity of emptying aperture, which can according to need, is set as 7,8, to meet the needs of different driving faces.
The steel for shot structure of this roadway development blasting, the auxiliary blasthole be evenly distributed in keyhole and periphery hole it Between, hole depth is 2.25m or so, diameter 40mm, and assisting the spacing between blasthole is 500~750mm.Periphery blasthole is distributed in disconnected On facial contour line, the pitch of holes of periphery blasthole is 600mm, and the distance of distance auxiliary blasthole is 500mm or so, and blast hole depth is 2.25m left and right.
Shown in Fig. 2, central charge blasthole 1 described in the steel for shot structure of this roadway development blasting is incorporated with the fried of detonation Medicine, two surrounding loaded holes 2 being oppositely arranged centered on central charge blasthole 1 are that loaded hole 2 divides around one group, two groups It is not incorporated with the delayed ignition pack and explosive being delayed according to this.When powder charge, aperture stemming length is 200mm~300mm or so, is remained The whole powder charges of remaining part point.
The explosion tunneling process of the steel for shot structure of this roadway development blasting are as follows: (1) central charge blasthole 1 carries out first Explosion;Serving enhances broken swollen and throws slag, forms vallecular cavity.
Loaded hole 2 is respectively in second and third time successively explosion, the delay time control of every separate explosion around (2) two groups System was at 0.5 second;To expand vallecular cavity, to form bigger vallecular cavity;Slotting is completed in this way, provides second for routine via hole explosion A scope of freedom.
(3) after the completion of slotting, other auxiliary blastholes, periphery blasthole are successively detonated, and driving face explosion is completed.
(4) the laggard traveling ruler statistics of development blasting, optional 8 separate explosion driving, statistical result are shown in Table 1.
Table 1: drilling depth counts after development blasting

Claims (5)

1. a kind of steel for shot structure of roadway development blasting comprising keyhole and auxiliary blasthole, it is characterised in that: described to draw Slot is to be drilled with loaded hole and emptying aperture (3) in driving face;The loaded hole include a central charge blasthole (1) and 4~5 surrounding loaded holes (2), central charge blasthole (1) are located at the center in drift section slotting area;The emptying aperture (3) Quantity is 6~8, and emptying aperture (3) is arranged circumferentially around central charge blasthole (1);Surrounding loaded hole (2) arrangement In the outer periphery position in emptying aperture region.
2. the steel for shot structure of roadway development blasting according to claim 1, it is characterised in that: the hole of the keyhole Deep 200~the 300mm of the deep depth than assisting blasthole.
3. the steel for shot structure of roadway development blasting according to claim 1, it is characterised in that: the hole of the keyhole Diameter is 40~42mm.
4. the steel for shot structure of roadway development blasting according to claim 1, it is characterised in that: the emptying aperture (3) with The hole of central charge blasthole (1) is in the heart away from for 100~150mm, the hole heart of surrounding loaded hole (2) and central charge blasthole (1) Spacing is 150~200mm.
5. the steel for shot structure of roadway development blasting according to any one of claims 1-4, it is characterised in that: institute Stating emptying aperture (3) is 6, and the upper and lower and two sides of central charge blasthole (1) are located in regular hexagon;The surrounding loaded hole (2) It is 4, the upper and lower and left and right sides in the enclosed regular hexagon region of emptying aperture (3) is located in prismatic.
CN201821966829.7U 2018-11-27 2018-11-27 The steel for shot structure of roadway development blasting Active CN209623525U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821966829.7U CN209623525U (en) 2018-11-27 2018-11-27 The steel for shot structure of roadway development blasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821966829.7U CN209623525U (en) 2018-11-27 2018-11-27 The steel for shot structure of roadway development blasting

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664761A (en) * 2020-05-08 2020-09-15 安徽理工大学 Cut blasting method based on pre-blasting
CN112595192A (en) * 2021-01-14 2021-04-02 大冶有色金属有限责任公司 Variable-diameter cut structure and method for roadway excavation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664761A (en) * 2020-05-08 2020-09-15 安徽理工大学 Cut blasting method based on pre-blasting
CN112595192A (en) * 2021-01-14 2021-04-02 大冶有色金属有限责任公司 Variable-diameter cut structure and method for roadway excavation

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