CN211476894U

CN211476894U - Presplitting blasting charging means

Info

Publication number: CN211476894U
Application number: CN202020062751.7U
Authority: CN
Inventors: 徐荣兴; 秦志辉; 董训波
Original assignee: Angang Mining Blasting Co ltd
Current assignee: Angang Mining Blasting Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-09-11
Anticipated expiration: 2030-01-13

Abstract

The utility model discloses a presplitting blasting charging device, which comprises a plurality of sections of double-layer sleeves, wherein the adjacent double-layer sleeves are connected end to end through a buckle structure, each double-layer sleeve comprises an inner pipe and an outer pipe, and the buckle structure is welded between the inner pipe and the outer pipe; the double-layer sleeve is provided with a 120-degree arc opening along one axial side wall, two telescopic arc baffles are arranged at the arc opening relatively, one end of each arc baffle is embedded between the inner pipe and the outer pipe, and the angle of the arc opening can be adjusted by changing the telescopic distance of the arc baffle. After the roller drill forms a hole, the sleeve of the explosive charging device is timely filled, the stability of a blast hole can be improved, the problem of hole collapse under artificial or natural conditions is solved, the waste hole rate of the blast hole is reduced, and when explosive charging is carried out, an operator carries out explosive charging operation under the protection of the smooth sleeve wall of the sleeve, and the device provides guarantee for the rapid and safe construction of blasting operation.

Description

Presplitting blasting charging means

Technical Field

The utility model belongs to the technical field of the open-air blasting, a presplitting blasting charging means is related to.

Background

When the strip mine is used for blasting operation for controlling the boundary excavation outline, stones are easy to fall on the excavation edge line close to the edge, and a scum layer is formed. And blast hole scum layer disturbance is easily caused under the influence of operation of constructors and operation equipment, so that the hole blocking of a blast hole orifice is caused, waste holes are formed, the hole forming rate is low, the hole forming quality is poor, and the efficiency of blasting construction operation is influenced.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model aims at providing a presplitting blasting charging means sets up in big gun hole when blasting the operation, can protect the pore wall, improves the pore rate, charging efficiency to can solve the poor problem of presplitting blasting effect, through control explosive mounted position, collect a line with the energy, improve the blasting precision.

The utility model provides a presplitting blasting charging device, which comprises a plurality of sections of double-layer sleeves, wherein the adjacent double-layer sleeves are connected end to end through a buckle structure, each double-layer sleeve comprises an inner pipe and an outer pipe, and the buckle structure is welded between the inner pipe and the outer pipe; the double-layer sleeve is provided with a 120-degree arc opening along one axial side wall, two telescopic arc baffles are arranged at the arc opening relatively, one end of each arc baffle is embedded between the inner pipe and the outer pipe, and the angle of the arc opening can be adjusted by changing the telescopic distance of the arc baffle.

The utility model discloses an among the presplitting blasting charging means, be equipped with an at least parting bead in order to control the interior cartridge and the arc open-ended distance of double casing in the inner tube, the both ends of parting bead are worn out the welding of inner tube lateral wall on the inner tube wall of outer tube.

The utility model discloses an among the presplitting blasting charging means, cowl's both ends are equipped with the chock respectively, and at the inside bend in edge of arc opening part outer tube formation first flange, the outside bend in edge of inner tube forms the second flange that sets up with first flange relatively, between the chock embedding inner tube of cowl one end and the outer tube.

The utility model discloses an among the presplitting blasting charging means, double-deck sleeve pipe adopts industrial plastic to make.

The utility model discloses a presplitting blasting charging means can improve presplitting blasting pore-forming quality, charging efficiency to and improve presplitting blasting effect. After the roller drill forms the hole, the multi-section sleeve is timely filled into the blast hole, so that the stability of the blast hole can be improved, the problem of hole collapse under artificial or natural conditions is solved, and the waste hole rate of the blast hole is reduced. When powder charging, the operating personnel can charge the powder under the protection of the smooth sleeve wall of the sleeve, so that the explosive cartridge can slide down to the bottom of the hole more easily, and the powder charging quality and efficiency are ensured. The device provides guarantee for the rapid and safe construction of blasting operation. The utility model discloses novel structure, simple process guarantees the pore-forming quality, and furthest avoids collapsing the hole, reduces useless porosity, has improved the efficiency of construction, has practiced thrift construction cost. The utility model discloses a set up the effect that the arc opening made blasting gas form directional cutting big gun hole according to set direction on the pipe wall, form a directional blasting mode, improved side slope shaping effect.

Drawings

Fig. 1 is a schematic structural view of a pre-split blasting charge of the present invention;

figure 2 is a radial cross-sectional view of a presplit blasting charge of the present invention.

Detailed Description

As shown in fig. 1 and 2, the presplitting blasting charging device of the utility model comprises a plurality of sections of double-layer sleeves, and the pipe diameter of the double-layer sleeves is slightly smaller than the diameter of a blast hole. Adjacent double-deck sleeve pipe passes through buckle structure 1 and realizes end to end connection, and double-deck sleeve pipe includes inner tube 2 and outer tube 3, buckle structure 1 welding is between inner tube 2 and outer tube 3. During concrete implementation, two adjacent double-deck sleeves are connected through 3 buckle structure 1, and specific buckle structure 1 comprises buckle and draw-in groove, sets up buckle and draw-in groove respectively at double-deck sheathed tube head and the tail both ends. The double-layer sleeve is provided with a 120-degree arc opening along one axial side wall, two telescopic arc baffles 4 are arranged at the arc opening relatively, one ends of the arc baffles 4 are embedded between the inner pipe 2 and the outer pipe 3, and the angle of the arc opening can be adjusted by changing the telescopic distance of the arc baffles 4. During specific implementation, the angle range of the adjustable arc-shaped opening through the two arc-shaped baffle plates 4 is 60-120 degrees, and the angle can be specifically adjusted according to engineering requirements.

At least one division bar 5 is arranged in the inner pipe 2 to control the distance between the explosive cartridge in the double-layer casing and the arc-shaped opening, and two ends of the division bar 5 penetrate through the side wall of the inner pipe 2 and are welded on the inner wall of the outer pipe 3. The explosive cartridge can be limited in position by arranging the division bars 5, and the explosive cartridge is limited in the sleeve, so that the explosive cartridge is prevented from being exposed from the arc-shaped opening.

As shown in fig. 2, two ends of the arc-shaped baffle 4 are respectively provided with a stopper, the edge of the outer pipe 3 at the arc-shaped opening is bent inwards to form a first flange, the edge of the inner pipe 2 is bent outwards to form a second flange opposite to the first flange, and the stopper at one end of the arc-shaped baffle 4 is embedded between the inner pipe and the outer pipe. Specifically, as shown in fig. 2, one end of the arc-shaped baffle 4 is provided with a first stopper 41, the other end is provided with a second stopper 42, the first stopper 41 is disposed between the inner tube 2 and the outer tube 3, the first stopper 41 is prevented from coming off the double-layer sleeve by the cooperation of the first flange and the second flange, and the second stopper 42 is prevented from sliding into the double-layer sleeve. In specific implementation, the double-layer sleeve is made of industrial plastics.

Taking the diameter of a through blast hole of a roller-cone drilling machine of a surface mine as an example to be 250mm, the length of the double-layer sleeve in the embodiment is 1500mm, and the diameter is 180 mm. After the blast hole is drilled, the operators send the double-layer sleeves one by one into the blast hole along the wall of the rock mass hole in the protected area, the double-layer sleeves are arranged in an excavation area with arc-shaped openings facing the rock mass to be blasted, each section of double-layer sleeve is connected with a clamping groove through a buckle and then vertically sent to the bottom of the hole. The pipe wall of the double-layer sleeve can play a role in protecting the wall of the blast hole and ensure that the hole depth is not influenced by hole collapse. When an operator carries out explosive cartridge loading operation, the explosive cartridge is wound on the detonating cord and then is fed into the hole along the sleeve without coupling, the detonating cord is fixed on one side of the inner wall of the inner pipe, so that the explosive cartridge is positioned close to a protected rock mass in the blast hole, the damage effect of explosive explosion on the hole wall is reduced under the protection of the sleeve wall, the size of the arc opening is adjusted according to the lithology of the protected rock mass, energy-gathering directional cutting is formed, and the hole mark rate is ensured.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the spirit of the present invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-splitting blasting charging device is characterized by comprising a plurality of sections of double-layer sleeves, wherein the adjacent double-layer sleeves are connected end to end through a buckle structure, each double-layer sleeve comprises an inner pipe and an outer pipe, and the buckle structure is welded between the inner pipe and the outer pipe; the double-layer sleeve is provided with a 120-degree arc opening along one axial side wall, two telescopic arc baffles are arranged at the arc opening relatively, one end of each arc baffle is embedded between the inner pipe and the outer pipe, and the angle of the arc opening can be adjusted by changing the telescopic distance of the arc baffle.

2. The pre-split blast charge of claim 1 wherein the inner tube has at least one spacer disposed therein to control the distance between the cartridge in the double-walled sleeve and the arcuate opening, the spacer having ends that extend through the sidewall of the inner tube and are welded to the inner wall of the outer tube.

3. The pre-burst explosive charge of claim 1 wherein the arcuate shaped barrier has stops at each end, the edge of the outer tube at the arcuate shaped opening being bent inwardly to form a first flange, the edge of the inner tube being bent outwardly to form a second flange opposite the first flange, the stop at one end of the arcuate shaped barrier being embedded between the inner tube and the outer tube.

4. The pre-split blast charge of claim 1 wherein said double casing is made of industrial plastic.