CN213041105U - Novel reduce blasting root end rate device - Google Patents
Novel reduce blasting root end rate device Download PDFInfo
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- CN213041105U CN213041105U CN202021212552.6U CN202021212552U CN213041105U CN 213041105 U CN213041105 U CN 213041105U CN 202021212552 U CN202021212552 U CN 202021212552U CN 213041105 U CN213041105 U CN 213041105U
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Abstract
The invention discloses a novel device for reducing blasting root rate, and particularly relates to the field of engineering blasting. The device is integrally cylindrical, the bottom surface of the cylinder is a circular steel plate, and an upper top cover is not arranged. The circular steel plate on the bottom surface of the cylinder adopts high-carbon steel as a material and has the characteristics of high hardness and high strength. The blasting device can effectively prevent blasting shock waves from propagating downwards, and has the function of reflecting the shock waves to enable the shock waves to propagate around, the energy density of the reflected shock waves is greatly improved, and the blasting effect is enhanced. The side of the cylinder adopts red copper as material, and 6 conical energy-gathering grooves are arranged at the position 30mm away from the bottom of the cylinder along the side of the cylinder at equal intervals. The conical energy-gathering groove can fully utilize the energy-gathering effect when the explosive explodes to convert red copper into high-energy metal jet flow, so that the root bottom is effectively broken.
Description
Technical Field
The invention belongs to the technical field of engineering blasting, and particularly relates to a novel device for reducing blasting root rate, which is suitable for open deep hole blasting excavation of railway road cutting and large hydroelectric gate dam foundation pit excavation engineering.
Background
The deep hole blasting technology has great advantages in the aspects of improving the crushing quality, maintaining the stability of the side slope, improving the loading and transporting efficiency, improving the economic efficiency and the like. With the continuous improvement and development of mechanical equipment such as deep hole drilling machines and the like, deep hole blasting technology is widely applied to foundation pit excavation engineering of railway and highway cutting, mine open-pit mining engineering and hydroelectric gate dams.
Most of the deep hole blasting processes have a problem, and in order to achieve a more ideal blasting effect, ultra-deep drilling is usually adopted in the drilling process. The ultra-deep drilling is to overcome the influence of rock clamping on the blasting effect and prevent the blasting from reaching the designed height to generate root. The ultra-deep setting is too small, so root bottom is easy to generate; the ultra-deep is too large, so that drilling holes and explosives are wasted, and the blasting efficiency is reduced. And because the center of gravity of the explosive column is too low, the upper part of the step is easy to generate a large block and the integrity of the rock mass on the surface of the next step is damaged. Therefore, the ultra-deep drilling not only increases the workload of blasting construction, but also has unsatisfactory blasting effect. The invention relates to a novel device for reducing the blasting root bottom rate, which can replace ultra-deep drilling and effectively crush the root bottom by utilizing the blasting energy accumulation principle of explosives. Not only saves the explosive amount, but also greatly reduces the blasting construction difficulty, and can effectively solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model is not enough to the aforesaid, a can effectively overcome the root bottom has been proposed for the device of the reduction blasting root bottom rate that blasting excavation rock-base levels, the fluctuation is poor little, the root bottom is few.
The utility model adopts the following technical scheme: the utility model provides a novel reduce device of blasting root end rate wholly is the cylinder, and the wall thickness is 1mm, and the cylinder bottom surface is a circular steel sheet and does not have top cap, and the cylinder side adopts red copper as the material. The height of the cylinder is 80mm, and the diameter of the cylinder is 0.95 times of the diameter of the blast hole. And 6 conical energy-gathering grooves are arranged at the position 30mm away from the bottom surface of the cylinder along the side surface of the cylinder at equal intervals.
Preferably, the thickness of the round steel plate on the bottom surface of the cylinder is 2mm, and the round steel plate is made of high-carbon steel and has the characteristics of high hardness and high strength; the blasting shock wave can be effectively prevented from being transmitted downwards, the shock wave is reflected to be transmitted to the periphery, the energy density of the reflected shock wave is greatly improved, and the blasting effect is enhanced.
Preferably, the conical energy-gathering groove can fully utilize the energy-gathering effect of explosive explosion to convert red copper into high-energy metal jet flow, so that the root bottom is effectively broken.
Drawings
FIG. 1 is the overall structure diagram of the device of the present invention
FIG. 2 is a top view of the device of the present invention
Wherein, 1 is a conical energy-gathering groove, and 2 is a round steel plate.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, a novel device for reducing the blasting root rate comprises a cylindrical main body of the device, a conical energy-gathering groove 1 on the side surface of the cylindrical main body and a circular steel plate 2 on the bottom surface of the cylindrical main body.
The conical energy-gathering groove 1 adopts red copper as a material, so that the energy-gathering effect of explosive explosion can be fully utilized, the red copper is converted into high-energy metal jet flow, and the root bottom is effectively broken.
The circular steel plate 2 on the bottom surface of the cylinder adopts high-carbon steel as a material and has the characteristics of high hardness and high strength; the blasting shock wave can be effectively prevented from being transmitted downwards, the shock wave is reflected to be transmitted to the periphery, the energy density of the reflected shock wave is greatly improved, and the blasting effect is enhanced.
The principle that the device can effectively reduce the blasting root rate is as follows: after the explosive in the blast hole is detonated, when detonation waves are transmitted to the surface of the conical energy-gathering groove 1, explosive products are converged towards the axial direction of the conical energy-gathering groove to compress the groove to be closed. In the closing process of the energy-gathering grooves, the red copper is converted into high-energy metal jet flow to be ejected outwards due to extremely high pressure generated by collision, and meanwhile, the circular steel plate 2 at the bottom of the device reflects explosion shock waves to enable the explosion shock waves to be transmitted to the periphery, so that rocks at the bottom of a blast hole are effectively crushed, and the blasting root-bottom rate is reduced.
The specific implementation process comprises the following steps: firstly, manually cleaning a blasting area, and setting out a blast hole according to a blasting scheme design; drilling blast holes according to the lofting position and strict specifications of drilling construction; cleaning the bottom of the blast hole after the blast hole is drilled, ensuring no residue at the bottom, placing the device at the bottom of the blast hole, and ensuring the device to be horizontal; finally, filling explosives into the blast hole; after charging, the blast hole is blocked by clay or sand bags, and after the blast hole is blocked, the explosive in the blast hole can be detonated by a detonator after safety is confirmed.
Claims (2)
1. The utility model provides a novel reduce device of blasting root bed rate which characterized in that: the whole device is a cylinder, the bottom surface of the cylinder is a circular steel plate without an upper top cover, and the side surface of the cylinder adopts red copper as a material; the cylinder height is 80mm, and the cylinder diameter is 0.95 times of big gun hole diameter, and the equidistance along the cylinder side sets up 6 conical energy gathering recesses apart from cylinder bottom surface 30mm department.
2. The novel device for reducing the blasting root rate according to claim 1, wherein: the round steel plate on the bottom surface of the cylinder is made of high-carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021212552.6U CN213041105U (en) | 2020-06-24 | 2020-06-24 | Novel reduce blasting root end rate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021212552.6U CN213041105U (en) | 2020-06-24 | 2020-06-24 | Novel reduce blasting root end rate device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213041105U true CN213041105U (en) | 2021-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021212552.6U Active CN213041105U (en) | 2020-06-24 | 2020-06-24 | Novel reduce blasting root end rate device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213041105U (en) |
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2020
- 2020-06-24 CN CN202021212552.6U patent/CN213041105U/en active Active
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