KR102128932B1 - Deck charge blasting method with low vibration and low noise - Google Patents

Abstract

The present invention relates to a blasting method, which crushes a rock adjacent to safety things. The blasting method includes the following steps of: perforating a plurality of blasting holes in rocks to be crushed with a predetermined interval in a row and perforating the plurality of blasting holes in a direction increasingly remote from the safety things; charging each of the plurality of blasting holes with a pair of explosives, wherein the pair of explosives are charged to form stepped portions with the predetermined interval; and blasting the explosives in each of the blasting holes and blasting the pair of explosives in each of the blasting holes with an interval of a predetermined time difference while blasting the blasting holes with the interval of the predetermined time difference.

Description

DECK CHARGE BLASTING METHOD WITH LOW VIBRATION AND LOW NOISE

The present invention relates to a low-vibration and low-noise type blasting method, and more specifically, it is possible to minimize vibration and noise in a security object such as a house or facility in the blasting area, and greatly increase air (about 50% or more). It relates to a low-vibration and low-noise split blasting method that can be shortened.

Explosives blasting, which was commonly used to crush rock in the basic foundation or road extension work of buildings, is a perforator, etc., and then uses a puncturer to pierce multiple blasters into the rock, and then load the gunpowder, and then install the external power supply and the primer It is a technology to blast by operating the blast switch.

By the way, such blasting of blasting is common such as scattering of rock fragments on the crushed surface when blasting because there is no means to cushion the impact due to crushing of the rock due to blasting, and also due to vibration and rumble due to blasting There is a problem that cracks or noise pollution occurs in security items such as buildings and other facilities.

Particularly, in the case of construction in the downtown, construction of subways, or in the vicinity of farming farms in rural areas, there is no choice but to limit the crushing of rocks by means of explosive blasting, so mechanical crushing using a breaker is required. However, such mechanical crushing has a problem that noise is continuously generated and expensive.

Specifically, in the general blasting method, a hole is drilled in a row on a bench, but the ratio between the distance between the holes in the same row and the distance between the rows is set to 1.0 to 1.5.

This general blasting method intensively charges gunpowder from the bottom of the perforation hole to full color.

The above-described general blasting method has an advantage of simple drilling and charging, but has a disadvantage that vibration and noise are greatly generated and a mass may be generated in the upper ground.

In particular, recently, blasting operations for excavation are inevitably increasing due to large-scale national projects such as national highway expansion and highway construction, as well as construction of apartments and high-rise buildings in urban areas. The number of complaints that demand compensation for blasting pollution increases, and construction costs increase due to the complaints, and delays in the air cause delays in national projects.

As a countermeasure against this, micro-vibration and non-vibration methods, such as precision vibration control blasting or crushing excavation, are applied, but it is common for a lot of difficulties to be practically applied in construction where air is very important.

In order to solve this problem, recently, a method for reducing vibration and noise by dividing and discharging gunpowder in a hole has been proposed.

This split charge blasting method is a method of split charge charge using a separation rod.

This split-charging blasting method has the advantages of simple drilling of a drilling hole, less vibration and noise, and a smaller rock size after blasting than the above-described intensive charging blasting method.

However, the conventional split-charging blasting method has a problem in that the excavation rate may be lowered when the bedrock of the co-bottom is strong because it does not become an enclosed drug in the co-base because the explosives and the separating rods are alternately charged.

In addition, the conventional split charge blasting method has a problem in that the reduction efficiency of noise and vibration is lowered because the explosive charges that are partly charged in the perforated hole are blasted collectively by perforation hole.

Therefore, there is a need for a new technology that can overcome the problems of the prior art as described above.

Republic of Korea Registered Patent Publication No. 10-0733346 Republic of Korea Registered Patent Publication No. 10-0767740

The present invention was created to improve the problems of the prior art as described above, and divides and charges explosives in a plurality of blasting holes to have a step difference, and minimizes vibration and noise generation by blasting explosives to have a predetermined time difference for each step and blasting hole. The aim is to provide a low-vibration and low-noise split blasting method that can be performed.

Specifically, the present invention blasts the upper explosives disposed on the upper portion of the blasting hole in the order from the position closest to the security object, and then the lower explosives placed on the lower portion of the blasting hole in the order from the position closer to the security object. The objective is to provide a low-vibration and low-noise split blasting method in which vibration or noise transmission is minimized by blasting.

In addition, the object of the present invention is to provide a low-vibration and low-noise split blasting method that minimizes the transmission of vibration or noise to a security object by differently charging the height of the upper explosive and the lower explosive according to the position of the blasting hole.

In addition, it is an object of the present invention to provide a low-vibration and low-noise split blasting method that is convenient for construction by charging explosives through a device capable of adjusting the heights of the upper explosives, lower explosives, and colorants in advance.

The technical problems that can be obtained in the disclosed embodiments are not limited to the above-mentioned effects, and other technical problems that are not mentioned are those skilled in the art to which the embodiments disclosed from the following description belong. Will be clearly understood.

The low-vibration and low-noise type blasting method according to an embodiment of the present invention for achieving the above object is a blasting method for crushing a rock close to a security object, in which a plurality of blasting holes are specified in a rock to be crushed Perforating in a line at intervals, perforating the plurality of blasting holes in a direction away from the security object; Loading a pair of explosives into each of the plurality of blasting holes, and charging the pair of explosives to form a step at predetermined intervals; And blasting the explosives of each of the blasting holes, while blasting the blasting between the blasting holes at a predetermined time difference, blasting the pair of explosives of each of the blasting holes at a predetermined time difference. .

In addition, the blasting step, blasting at a predetermined parallax interval in the order of the position of the upper explosive from the position close to the security object of the pair of explosives charged to each of the explosives located above the blasting hole step; And, after the blasting of the upper explosive is performed, the lower explosives located below the blasting hole among the pair of explosives loaded in each of the blasting holes in a predetermined disparity interval in the order of a position distant from the security object and distant. It may include the step of blasting.

In addition, the step of loading the pair of explosives, each step of loading a lower explosive to a predetermined height below each of the blasting holes; Filling each of the blasting agents with a predetermined height on top of the lower explosive charge loaded in each of the blast holes; Loading an upper explosive to a predetermined height, respectively, on top of the colorant filled in each of the blasting holes; And filling each of the blasting holes with a predetermined height at the top of the upper explosive charge loaded in each of the blasting holes, and coloring each of the blasting holes.

In addition, in the step of charging the upper explosive, the position of the blasting hole may be gradually increased as the discharging height of the upper explosive increases.

In addition, the step of charging the lower explosive, the position of the blasting hole is further away from the security object, the charge height of the lower explosive can be gradually reduced.

In addition, the step of loading the pair of explosives includes: a lower holder for height-adjustable lower explosives disposed below the blast holes among the pair of explosives, and an upper portion of the blast holes among the pair of explosives. Preparing an explosive cassette comprising an upper holder to accommodate the upper explosive being arranged to be height-adjustable, and a colorant holder to be capable of height-adjusting the colorant while connecting the upper holder and the lower holder; Filling the lower explosive, the colorant and the upper explosive in each of the lower holder, the colorant holder and the upper holder constituting the explosive cassette to a predetermined height; Introducing the explosive cassette into each of the plurality of blast holes; And it may include the step of introducing a colorant to the top of the explosive cassette.

The low-vibration and low-noise type blasting method according to an embodiment of the present invention is applied to a security object by blasting a predetermined time difference for each step and for each blast hole in blasting explosive charges that are partly charged while forming a step in a plurality of blast holes It is possible to propose a low-vibration and low-noise split blasting method that can minimize vibration and noise.

Specifically, the present invention blasts the upper explosives placed on the upper portion of the blasting hole at a predetermined parallax interval in the order from the position closest to the security object, and then the lower explosives placed on the lower portion of the blasting hole are located at a position closer to the security object. By blasting at predetermined parallax intervals in the order of distant locations, vibration or noise transmission to the security object can be minimized.

In addition, according to the present invention, the blasting of the upper explosive and the lower explosive can be distinguished by filling the colorant between the upper explosive and the lower explosive.

In addition, according to the present invention, as the position of the blasting hole is further away from the security object, the structure of increasing the charge height of the upper explosive is gradually reduced, thereby further reducing vibration and noise through a reduction in the charge amount of the upper explosive position near the security object. I can do it.

In addition, according to the present invention, the blasting performance of each blasting hole can be maintained by uniformly forming the total charge amount of the blasting hole as the position of the blasting hole is farther away from the security object, so that the height of the lower explosive is gradually reduced.

In addition, the present invention has an advantage in that the installation of explosives is very easy by adjusting the heights of the upper explosives, the lower explosives, and the colorant in advance through the explosives cassette and then inserting the explosives cassette into each blast hole.

The effects obtained in the disclosed embodiments are not limited to the above-mentioned effects, and other effects not mentioned are obvious to those skilled in the art to which the embodiments disclosed from the following description belong. Can be understood.

1 is an explanatory view showing a construction state of the low vibration and low noise type blasting method according to an embodiment of the present invention.
Figure 2 is a flow chart showing a low-vibration and low-noise split blasting method according to an embodiment of the present invention.
3 is an explanatory view showing a construction state of a low vibration and low noise type blasting method according to another embodiment of the present invention.
4 is an explanatory view showing a construction state of the low vibration and low noise type blasting method according to another embodiment of the present invention.
5 is a flow chart showing a low vibration and low noise type blasting method according to another embodiment of the present invention.
6 is a longitudinal sectional view showing an explosive cassette according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, detailed descriptions of related well-known general-purpose functions or configurations will be omitted.

Embodiments according to the concept of the present invention can be applied to various changes and may have various forms, so specific embodiments are illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiment according to the concept of the present invention to a specific disclosure form, and it should be understood that it includes all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle. Other expressions that describe the relationship between the components, such as "between" and "immediately between" or "adjacent to" and "directly neighboring to," should be interpreted similarly.

The terms used herein are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "include" or "have" are intended to indicate that a feature, number, step, action, component, part, or combination thereof described is present, and one or more other features or numbers. It should be understood that it does not preclude the existence or addition possibilities of, steps, actions, components, parts or combinations thereof.

1 is an explanatory diagram showing the construction state of the low vibration and low noise type blasting method according to an embodiment of the present invention, Figure 2 is a flow chart showing a low vibration and low noise type blasting method according to an embodiment of the present invention, 3 is an explanatory view showing a construction state of a low vibration and low noise type blasting method according to another embodiment of the present invention. In addition, Figure 4 is an explanatory diagram showing the construction state of the low-vibration and low-noise type blasting method according to another embodiment of the present invention, Figure 5 is a low-vibration and low-noise type blasting method according to another embodiment of the present invention 6 is a longitudinal sectional view showing an explosive cassette according to an embodiment of the present invention.

The low-vibration and low-noise split blasting method according to an embodiment of the present invention is a blasting method for crushing a rock in a blasting area close to a security object such as a house or facility.

Specifically, the low-vibration and low-noise type blasting method according to an embodiment of the present invention includes the steps of drilling a blasting hole as shown in FIG. 2 (S100), charging a blasting explosive (S200) and blasting explosives It may be performed, including the step (S300).

The step of drilling the blasting hole (S100) is a process of puncturing a plurality of blasting holes (1) in which explosives are charged at a predetermined interval.

The step of puncturing such a blasting hole (S100) may punch a plurality of blasting holes 1 in a line in a direction away from the security object 50 as shown in FIG. 1.

Here, the plurality of blasting holes 1 may puncture the entire length of the blasting hole 1 and the distance between the blasting holes 1 in a range of 1: 0.5 to 1.2 according to the rock condition of the blasting area.

In addition, the plurality of blasting holes 1 may be perforated in a direction away from the security object 50 while forming a plurality of rows.

The step (S200) of charging explosives to the blasting hole is a step of loading the explosives (100) for crushing the rock into each of the plurality of blasting holes (1), specifically, as shown in FIG. A pair of explosives (100) forming a step, that is, the upper explosive (110) and the lower explosive (120) may be charged in each of the blasting holes (1).

The step (S200) of charging the explosive in the blasting hole (1) is a step (S210) of charging the lower explosive 120, as shown in FIG. 2, and filling the colorant 200 on the upper portion of the lower explosive 120 Step (S220), the step of charging the upper explosive (110) (S230) and the upper explosive 110 may be performed, including the step of filling the colorant 200 on top.

In the step S210 of charging the lower explosives 120, the lower explosives 120 may be respectively charged to a predetermined height under each of the plurality of blast holes 1.

Here, the explosive 100 may be applied to a low explosive explosive, but is not limited thereto, and all explosives widely known in the field to which the present invention pertains may be applied.

Filling the colorant 200 on the upper portion of the lower explosive (120) (S220) may fill the colorant 200, such as sand, with a predetermined height on top of the lower explosive (120) charged in each blasting hole (1). have.

Here, the height of the lower explosive 120 and the height of the colorant 200 may be constructed at a ratio of 1: 1.5 to 2.5.

In the step of charging the upper explosive 110 (S230), the upper explosive 110 may be charged at a predetermined height to the upper portion of the colorant 200 filled in each of the plurality of blasting holes 1.

Here, the height of the lower explosive 120 and the height of the upper explosive 110 may be constructed at a ratio of 1: 0.5 to 0.9.

The step of filling the colorant 200 on the upper portion of the upper explosive 110 (S240) may fill the colorant 200, such as sand, with a predetermined height on top of the upper explosive 110 charged in each blast hole 1. have.

Here, the height of the upper explosive 110 and the height of the colorant 200 may be constructed at a ratio of 1: 1.5 to 2.5.

The blasting step (S300) is a step of blasting through an ignition mechanism (not shown) by connecting each explosive device (100) to each blasting hole (1), and connecting conductors drawn out of each blasting hole (1) in series or in parallel. It can be blasted by igniting it through an igniter.

In particular, in the blasting step (S300), the blasting devices installed in each blasting hole 1 are blasted at predetermined intervals for each blasting hole 1, and at the same time, the blasting operation is performed at intervals of each step of the explosive 100. I can do it.

More specifically, in the step of blasting (S300), among the pair of explosives 100 charged in each of the blasting holes 1, the upper explosive 110 located above the blasting hole 1 is secured 50 It can be blasted at predetermined parallax intervals in the order from (1)(2)(3)(4) in the order from the near to far positions.

At this time, the upper explosives 110 charged to each of the blasting holes 1 may be blasted in order from a location close to a location close to the security object 50 while forming a parallax interval of 1/1000 second.

Accordingly, the upper explosives 110 are blasted at a predetermined parallax at intervals, so that the blasting effect is not reduced due to the mutual interference effect of vibration, and a vibration reduction effect can be obtained.

After the blasting of the upper explosives 110 is completed, in the blasting step (S300), the lower explosives 120 located below the blasting holes 1 among the pair of explosives 100 loaded in each of the blasting holes 1 It can be blasted at a predetermined parallax interval in the order of the position from the near to the far from the security object 50, that is, in the order of (5)(6)(7)(8).

At this time, the lower explosive charges 120 charged to each of the blasting holes 1 may be blasted in the order of a position distant from the security object 50 at a disparity interval of 1/1000 second.

That is, the upper explosive 110 and the lower explosive 120 of each blasting hole 1 are spaced at 1/1000 second intervals (1)(2)(3)(4)(5)(6)(7 )(8), and accordingly vibration and noise transmitted to the security object 50 can be minimized.

On the other hand, in the above-described step (S230) of charging the upper explosive, the charge height of the upper explosive 110, that is, the charge amount may be differently charged according to the position of the blasting hole 1.

Specifically, in the step of charging the upper explosive (S230), as shown in Figure 3, the position of the blasting hole (1) is farther away from the security object 50, the charge to increase the charge height of the upper explosive 110 more and more can do.

That is, in the step of charging the upper explosive (S230), when the position of the blasting hole 1 is close to the security object 50, the loading amount of the upper explosive 110 is charged below the reference value, and the position of the blasting hole 1 is secured. As the distance from the object 50 increases, the charge amount of the upper explosive 110 may be gradually increased.

Accordingly, when the upper explosive 110 is blasted, vibration or noise applied to the security object 50 may be further reduced.

In addition, in the step (S210) of charging the above-described lower explosive, the charge height of the lower explosive 120, that is, the charge amount may be differently charged according to the position of the blasting hole 1.

Specifically, in the step of charging the lower explosive (S210), as shown in Figure 4, the position of the blasting hole 1 is farther away from the security object 50, the lower the explosive 120, the lower the charge height of the charge to gradually decrease can do.

That is, in the step of loading the lower explosive (S210), when the position of the blasting hole (1) is close to the security object (50), the loading of the lower explosive (120) is charged above the standard value, and the position of the blasting hole (1) is secured. As the distance from the object 50 increases, the charge amount of the lower explosive 120 may be gradually reduced.

Accordingly, the plurality of blasting holes (1), the farther the amount of charge of the lower explosive (120) gradually increases while the amount of charge of the upper explosive (110) gradually increases away from the security object (50). By uniformly charging, uniform blasting performance can be exhibited.

On the other hand, the step of charging the above-described explosive (S200), unlike the above, preparing the explosive cassette as shown in Figure 5 (S250), filling the lower explosive and colorant and the upper explosive (S260), explosive It may be performed, including the step of introducing a cassette (S270) and the step of introducing a colorant (S280).

The step of preparing the explosive cassette (S250) prepares the explosive cassette 300 for collectively installing the above-described lower explosive 120 and the colorant 200 and the upper explosive 110 from the outside of the blasting hole 1. It is a step.

Specifically, the explosive cassette 300 may be made of a paper material so as not to interfere with the explosion of the explosive 100, as shown in Figure 6, the lower holder 310, the upper holder 320 and the colorant holder 330 ).

The lower holder 310 is a component that accommodates the above-described lower explosive 120 so as to be height-adjustable, and can be formed to be adjustable in length by being divided into a plurality of telescopic methods while forming a part of an open cylinder. .

The lower holder 310 may accommodate the lower explosive 120 through the opened portion, and the length of the lower explosive 120 may be adjusted by adjusting the length through telescopic stretching of the divided portion. have.

The upper holder 320 is a component that accommodates the above-described upper explosive 110 so as to be height-adjustable, and can be formed to be adjustable in length by being divided into a plurality of telescopic methods while forming a part of an open cylinder. .

The upper holder 320 can accommodate the upper explosive 110 through the opened portion, and the length of the upper explosive 110 can be adjusted by adjusting the length through telescopic expansion and contraction of the divided portion. have.

Here, the length of the upper holder 320 and the lower holder 310 can be stretched in a sliding manner, and in contrast, the length of the divided part can be stretched while rotating through screwing.

The colorant holder 330 is a component that accommodates the colorant 200 such as sand to be height-adjustable while connecting the upper holder 320 and the lower holder 310.

The colorant holder 330 is divided into a plurality of parts while forming a cylindrical shape with an opening, and is telescopically coupled to form a telescopic tube 331 that is capable of length adjustment, an upper connection cap 332, and a lower connection cap 333. It may be configured to include.

The telescopic tube 331 may accommodate the colorant 200 through the opened portion, and the length of the colorant 200 may be adjusted by adjusting the length through telescopic expansion and contraction of the divided portion.

In addition, the telescopic tube 331 may be stretched in length in a divided portion in a slide manner, or alternatively, in a divided portion, the length may be stretched while rotating through screwing.

The upper connection cap 332 may shield the opened portion of the upper holder 320 while connecting the telescopic tube 331 and the above-described upper holder 320.

The lower connection cap 333 may shield the opened portion of the lower holder 310 while connecting the telescopic tube 331 and the aforementioned lower holder 310.

Here, the upper connection cap 332 and the lower connection cap 333 may be fitted in a slide manner with the telescopic tube 331, the upper holder 320, and the lower holder 310, or otherwise coupled through a screw connection Can be.

The step of filling the lower explosive, the colorant, and the upper explosive (S260) includes the lower explosive 120, the lower holder 310, the upper holder 320, and the colorant holder 330 constituting the aforementioned explosive cassette 300, respectively. The colorant 200 and the upper explosive 110 may be respectively filled with a predetermined height.

At this time, in the step (S260) of filling the lower explosive, the colorant, and the upper explosive, the lower explosive (()) while adjusting the height of the lower holder 310, the upper holder 320, and the colorant holder 330 according to the position of the blasting hole 1 120) and the colorant 200 and the upper explosive 110 may be filled.

In the step of introducing the explosive cassette (S270), the lower explosive 120 and the colorant 200 and the upper explosive 110 are filled with a predetermined height through the above-described process, each explosive hole (1) Can be put in.

Accordingly, the lower explosives 120, the colorant 200, and the upper explosives 110 may be batch-filled in the explosive cassette 300 from the outside of the blasting hole 1 and then put in the blasting hole 1 collectively. .

The step of introducing the colorant (S280) is a step of colorizing the respective blasting holes 1 by applying the colorant 200 to the upper portion of the explosive cassette 300.

After completing the step (S200) of charging the explosives as described above, blasting may be completed by performing the aforementioned blasting step (S300).

As described above, according to the low-vibration and low-noise type blasting method according to an embodiment of the present invention, the upper explosives 110 disposed on the top of the blasting hole 1 are distant from the security object 50 After blasting at a predetermined parallax interval in the order of the position, security is performed by blasting the lower explosives 120 disposed at the lower part of the blasting hole 1 at a predetermined parallax interval in the order of a position distant from a position close to the security object 50 Vibration or noise transmission to the object 50 may be minimized.

The above-described embodiments are for illustration only, and those skilled in the art to which the above-described embodiments belong can easily be modified into other specific forms without changing the technical idea or essential characteristics of the above-described embodiments. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected through the present specification is indicated by the claims, which will be described later, rather than by the detailed description, and should be interpreted to include all modified or modified forms derived from the meaning and scope of the claims and their equivalent concepts. .

1: Blaster
50: security items
100: explosive
110: upper explosive
120: lower explosive
200: colorant
300: explosive cassette
310: lower holder
320: upper holder
331: Telescopic Hall
332: upper connection cap
333: lower connection cap
330: colorant holder

Claims (6)

In the blasting method of crushing the rock close to the security object,
Punching a plurality of blast holes in a line at predetermined intervals in a rock of a crushing target, and puncturing the plurality of blast holes in a direction away from the security object;
Loading a pair of explosives into each of the plurality of blasting holes, and charging the pair of explosives to form a step at predetermined intervals; And
Blasting the explosives of each of the blasting holes, blasting the blasting between the blasting holes at a predetermined time difference while blasting the pair of explosives of each of the blasting holes at a predetermined time difference,
The step of loading the pair of explosives,
A lower holder configured to be partly divided into a plurality of open-ended cylinders and combined in a telescopic manner capable of adjustment of length, to accommodate a lower explosive disposed below the blast hole among the pair of explosives to be adjustable in height; An upper holder that is partially divided into a plurality of openings and combined in a telescopic manner capable of adjusting its length, and accommodates an upper explosive disposed above the blast hole among the pair of explosives so as to be adjustable in height; A telescopic tube partially connected to the telescopic method which is divided into plural while forming an open cylinder and capable of height-adjusting the colorant through the opened part, and the upper holder while connecting the telescopic tube and the upper holder Preparing an explosive cassette comprising an upper connecting cap for shielding the opened portion of the carrier, and a colorant holder comprising a lower connecting cap for shielding the opened portion of the lower holder while connecting the telescopic tube and the lower holder;
Filling the lower explosive, the colorant, and the upper explosive with a predetermined height in each of the lower holder, the colorant holder, and the upper holder constituting the explosive cassette;
Introducing the explosive cassette into each of the plurality of blast holes; And
Low vibration and low noise type blasting method comprising the step of adding a colorant to the upper portion of the explosive cassette.
According to claim 1,
The blasting step,
Blasting the upper explosives located above the blast holes among the pair of explosives loaded in each of the blast holes at predetermined parallax intervals in the order from a location close to a distant location to the security object; And
After the blasting of the upper explosive is performed, the lower explosives located at the lower portion of the blasting hole among the pair of explosives loaded in each of the blasting holes are arranged at a predetermined parallax interval in the order from the position closest to the position distant from the security object. A low-vibration and low-noise split blasting method comprising the step of blasting.
delete According to claim 1,
Filling the upper explosive to a predetermined height,
A low-vibration and low-noise split blasting method, characterized in that as the position of the blasting hole is further away from the security object, the charge height of the upper explosive is gradually increased.
According to claim 1,
Filling the lower explosive to a predetermined height,
A low-vibration and low-noise split blasting method, characterized in that as the position of the blasting hole is further away from the security object, the charge height of the lower explosive is gradually reduced.
delete

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