CN211668367U

CN211668367U - Open blasting hole-by-hole detonating network

Info

Publication number: CN211668367U
Application number: CN201922020406.7U
Authority: CN
Inventors: 张相羽; 王建春; 杨家全; 罗会成
Original assignee: Yichun Luming Mining Co ltd
Current assignee: Yichun Luming Mining Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-10-13
Anticipated expiration: 2029-11-20

Abstract

The utility model provides a hole detonating network is pursued in open-air blasting belongs to engineering blasting technical field. The utility model discloses explode the district and constitute by the square that four centers overlap, and the number of big gun hole on every square scales up from inside to outside in proper order, arrange the time delay detonator and be located the diagonal line in exploding the district and transmission direction from inside to outside, the time delay detonator is upwards respectively or is followed square direction transmission downwards by arranging the time delay detonator between the hole, and upwards and the transmission line is the same with big gun hole number on the downwards except that on every square outside the square of center, set up time delay detonator or arrange time delay detonator between the hole in every big gun hole, the detonator is located the big gun hole on the square of center, the transmission detonator passes through the detonating cord with arranging between the hole and is connected according to the transmission direction. The utility model relates to a hole blasting network is pursued in open-air blasting has effectively reduced the detonating transmission distance, has shortened the detonating time, reduces detonating interruption risk, has increased the blasting free surface, simple structure, convenient popularization.

Description

Open blasting hole-by-hole detonating network

Technical Field

The utility model relates to a hole detonation network is pursued in open-air blasting belongs to engineering blasting technical field.

Background

The surface blasting is widely applied to large-scale projects such as railways, surface mines, reservoirs and the like, and large hard rocks are blasted and crushed by explosives, so that the mechanical loading and transportation are facilitated. The open blasting can be divided into several modes such as simultaneous blasting, row spacing differential blasting and hole spacing differential blasting from the perspective of initiation delay, wherein the hole spacing differential blasting is also called hole-by-hole initiation.

The hole-by-hole initiation is to arrange delay initiation detonators between each blast hole, the delay time is generally in the millisecond level, and one-time blasting is classified into one blast hole and one blast hole is respectively initiated through the delay effect, so that propagation of a blasting free surface is facilitated, the blasting effect is improved, and blasting vibration can be reduced.

However, when the traditional detonation network is newly opened in a surface mine, the free surface is insufficient, so that the blasting effect is poor; when the area of the explosion area is larger, the conduction distance is longer, and then the risk of explosion interruption is increased, thereby causing explosion rejection.

Disclosure of Invention

The utility model aims at solving the problems existing in the prior art and further providing an open blasting hole-by-hole initiation network.

The utility model aims at realizing through the following technical scheme:

an open blasting hole-by-hole detonation network comprises a detonating tube, blast holes, inter-hole delay detonators, inter-row delay detonators and a detonating cord, wherein a detonation area is composed of squares with overlapped centers, the number of the blast holes on each square is sequentially increased from inside to outside, the inter-row delay detonators are positioned on diagonal lines of the detonation area, the transmission direction of the inter-row delay detonators is from inside to outside, the inter-hole delay detonators are respectively transmitted upwards or downwards along the direction of the squares by the inter-row delay detonators, the number of the blast holes on each square is the same as that of the upward and downward transmission lines except the center square, the inter-hole delay detonators or the inter-row delay detonators are arranged in each blast hole, the detonating tube is positioned in the blast holes on the center square, and the inter-hole.

The utility model relates to a hole detonation network is pursued in open-air blasting, the delay time of arranging the time delay detonator is 2-3 times of the delay time of hole time delay detonator.

The utility model relates to a hole blasting network of detonating one by one in open-air blasting, explode every square in the district and constitute by 4(1+2n), (n ═ 0, 1,2,3, … n) big gun holes from inside to outside in proper order.

The utility model relates to a hole blasting network of detonating one by one of open-air blasting, delay detonator is 25ms between the hole, and delay detonator is 65ms between the row, and downthehole delay detonator is 400 ms.

The utility model relates to a hole blasting network of detonating one by one of open-air blasting, the big gun hole diameter is 250mm, the degree of depth is 17.5m, it is 8m to fill the height.

The utility model relates to a hole blasting network is pursued in open-air blasting has effectively reduced the detonating transmission distance, has shortened the detonating time, reduces detonating interruption risk, has increased the blasting free surface, simple structure, convenient popularization.

Drawings

Fig. 1 is the schematic diagram of the utility model discloses time delay detonator is located the upper left corner between the middle rank.

Fig. 2 is the schematic diagram of the utility model discloses the middle row time delay detonator is located the upper right corner.

In the figure, 1 is a detonating tube; and 2 is a blast hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

The first embodiment is as follows: as shown in fig. 2, in the open blasting hole-by-hole detonation network according to the embodiment, inter-row transmission may be located at the lower left corner, the upper right corner or the lower right corner of a detonation zone, and the transmission direction may be adjusted according to actual conditions; the number of the blast holes on the square in the explosion area can be increased, and the number of the blast holes on the square in the explosion area is not more than five (namely n is less than or equal to 5) in order to ensure the blasting quality because the patent is applied to the blasting of a newly opened section of a surface mine.

The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An open blasting hole-by-hole detonating network is characterized by comprising a detonating tube (1), blast holes (2), inter-hole delay detonators, inter-row delay detonators and detonating cords, wherein a detonating area consists of squares with overlapped centers, and the number of blast holes (2) on each square is increased from inside to outside in sequence, the row interval delay detonators are positioned on the diagonal line of the explosion area and the transmission direction is from inside to outside, the hole interval delay detonators are respectively transmitted upwards or downwards along the square direction by the row interval delay detonators, and the number of blast holes (2) on each square upward and downward transmission line is the same except the central square, each blast hole (2) is internally provided with an inter-hole delay detonator or an inter-row delay detonator, the detonating tube (1) is positioned in the blast hole (2) on the central square, and the inter-hole transmission detonator and the inter-row transmission detonator are connected through a detonating cord according to the transmission direction.

2. The open blasting hole-by-hole blasting network of claim 1, wherein the delay time of the row time delay detonator is 2-3 times the delay time of the hole time delay detonator.

3. An open blast hole-by-hole blasting network according to claim 1, wherein each square in said blast zone is composed of 4(1+2n) holes in turn from inside to outside, where n is 0, 1,2,3 … n.

4. An open blast hole-by-hole blasting network according to claim 1 or 2, wherein the inter-hole delay detonators are 25ms, the inter-row delay detonators are 65ms and the intra-hole delay detonators are 400 ms.

5. An open blasting hole-by-hole detonation network according to claim 1, characterised in that the blastholes (2) have a diameter of 250mm, a depth of 17.5m and a stemming height of 8 m.