KR100988052B1 - City blast excavating method using ignition of ammo hole and detonator - Google Patents

Abstract

PURPOSE: A rock blasting and excavating method for the downtown area using simultaneous ignition of large-hole cylinder cuts and electronic detonators is provided to minimize vibration and noises and improve excavation effect in the downtown area. CONSTITUTION: A rock blasting and excavating method for the downtown area using simultaneous ignition of large-hole cylinder cuts and electronic detonators is as follows. When constructing a sidewall pile and an intermediate pile in an excavated region, large-hole cylinder cuts(10) are bored to form a free surface. A plurality of cut-holes(11) are bored at regular intervals in the circumference of the large-hole cylinder cuts and filled with gunpowder. A powder charged holes are bored in the circumference of the intermediate pile. The closest to the farthest cut-holes with respect to the large-hole cylinder cuts are successively blasted and the powder charged holes are simultaneously blasted.

Description

CENTRY BLAST EXCAVATING METHOD USING IGNITION OF AMMO HOLE AND DETONATOR}

The present invention relates to an urban rock blasting excavation method using a large diameter armed medicine, and more particularly, to a downtown area using a large diameter armed medicine and an electro-explosive detonator system at the time of blasting excavation for installing a subway station or a ventilation opening in a downtown area. It relates to a rock blasting excavation method.

As is well known, the blasting excavation method of rock mass is classified into tunnel blasting, trench blasting, and open blasting (stair blasting) according to the number of free surfaces.

Excavation conditions of subway stations and ventilation openings in urban areas form topographical conditions that are different from those of open-air blasting. Initially, they exhibit one free surface blasting characteristics similar to tunnel blasting. In other words, the blasting excavation conditions in the downtown area are completely different from the open blasting conditions, but according to the application of open blasting standards with two or three free surfaces, the blasting method cannot be applied when the subway station or the ventilation hole is excavated in the downtown area, When the blasting method is applied, the free surface cannot be secured, which causes very large vibrations, causing damage to surrounding security objects and living environment.

In addition, in the case of rock excavation for the installation of subway stops or ventilation openings in the downtown area, the intermediate piles and connecting parts installed to prevent the buckling of the upper traffic load and the buckling prevention are damaged by blasting. In many cases it is performed by.

The present invention is to solve the problems described above, to increase the excavation efficiency and to minimize the noise and vibration through the blasting method adapted to the free surface conditions and characteristics of the downtown when blasting excavation for installing the subway station or ventilation openings in the downtown The purpose is to provide urban rock blasting excavation method using large-caliber armed medicine.

In addition, another object of the present invention is to apply the blasting method while protecting the intermediate pile using the electron primer simultaneous detonation system.

The urban rock blasting excavation method using the large diameter armed medicine and electron primers in accordance with the present invention for achieving the object as described above, when the sidewall pile and intermediate pile construction in accordance with the excavation area of the underground facilities including the station and the ventilation opening A first step of forming a free surface by simultaneously drilling a large diameter armed medicine (using a middle pile drilling equipment); A second step of drilling a gunpowder in the masonry after drilling a plurality of pottery holes at regular intervals around the circumferentially-armed medicinal ball at one or more large diameter armed medicinal holes on a plane after the first step; After the second step, to prevent the middle pile damage, the third stage and the large-caliber armed medicine center are generated by applying the electron primer simultaneous detonation system to the four medicine cabinets symmetrically around the middle pile to generate a line crack around the middle pile. By blasting in the order of the nearest medics from the nearest medics, the fourth step to increase the excavation efficiency and minimize the noise and vibration during blasting excavation downtown.

According to the urban rock blasting excavation method using the large diameter armed medicament and the electro-explosive detonation in accordance with the present invention, when the blasting excavation for installing a subway station or a ventilator in the downtown Since the blasting is carried out by securing the free surface for noise and vibration reduction, the blasting efficiency can be increased even if the blasting is carried out in the downtown area, and the vibration and noise can be minimized. It can be suppressed.

In addition, the middle pile for supporting the perforated plate for the traffic of the vehicle can improve the stability by generating a line crack around the middle pile before applying the blasting method, wherein the four medicine cabinets symmetrical with each other around the middle pile By blasting by applying primer simultaneous detonation system, it is possible to prevent the damage of intermediate piles and joints by minimizing the deformation of intermediate piles by using the superposition effect of blasting stress waves at the same time.

1 is a plan view of a large diameter armed medicinal and medicinal holes according to the urban blasting excavation method using a large diameter armed medicament and electron primers in accordance with the present invention.
Figure 2 is a cross-sectional view of the provisional installation for urban rock blasting excavation method using the large-diameter armed medicine and electron primer at the same time according to the present invention.
Figure 3 is a detailed view of the large-diameter armed pharmacy and medicament applied to the urban blasting excavation method using the large-diameter armed medicament and electron primer at the same time according to the present invention.
Figure 4 is a blasting pattern diagram of large diameter armed pharmacy and medicament applied to downtown cancer blasting excavation method using a large diameter armed medicament and electron primers in accordance with the present invention.
Figure 5 is a detailed view of the electron primer simultaneous detonation system for generating a line crack around the middle pile applied to the urban blasting excavation method using a large diameter armed medicine and an electron primer at the same time according to the present invention.
Figure 6 and Figure 7 is a view showing a process of downtown rock blasting excavation method using a large diameter armed medicine and electron primers in accordance with the present invention.

As shown in Figure 1 and Figure 2, the urban rock blasting excavation method using a large diameter armed pharmacy and the electron primer at the same time is as follows.

(S10) Installation of temporary facilities.

When constructing a facility such as a subway station or a ventilation opening in a downtown area, a side wall pile (dirt wall) 1 is installed at the periphery in accordance with the design of the facility, and between the side wall piles 1, that is, the construction area of the facility. To install a plurality of intermediate piles (2) and horizontal braces (3) for installing the perforated plate (5) for the passage of the vehicle at regular intervals.

As shown in Figure 5, the middle pile (2) can be installed in the pile installation hole (4), that is, drilling a plurality of pile installation holes (4) using a vertical drilling machine, the pile installation hole (4) Insert and install the middle pile (2).

When the installation of the intermediate pile (2) is completed, by installing the vent hole plate (5) on the upper end of the intermediate pile (2) to enable the passage of the vehicle while excavating the ground and install a horizontal brace according to the excavation depth (3).

Since the side wall pile 1, the intermediate pile 2, the horizontal support 3 and the perforated plate 5, which are the above-described temporary facilities, are the same as those used in the related art, detailed description thereof will be omitted.

(S20) Large caliber armed medicinal and deep hair drill.

The present invention is to blast and excavate in a state that does not interfere with the traffic of the vehicle according to the characteristics of the downtown, that is, the temporary installation (side wall pile (1), the middle pile (2), etc.) is installed through the installation process (S10). Blasting takes place in a state. Therefore, due to the nature of the downtown to minimize the noise and vibration to increase the excavation efficiency and the intermediate pile (2), for example, it should be so as not to bend deformation or damage the connection. This is because a large accident may occur due to the vehicle in traffic when the deformation or the connection portion of the intermediate pile 2 is damaged, as well as the problem of noise and vibration.

As shown in FIG. 3, in order to satisfy the above-described conditions, the present invention uses a large diameter armed medicine ball 10 for forming two or more free surfaces in the ground and a cardiac hole 11 for blasting. At this time, the large-caliber armed medicine 10 performs the drilling to the blast planning depth using the intermediate pile (2) drilling equipment.

The pattern of the heart hole (11) is arranged in the form of a square, for example, around the large diameter armed medicine (10), and the first row heart ball (11- 11) from the one close to the large diameter armed medicine (10) for better understanding. 1), the second row cardiac hole 11-2, the third row cardiac hole 11-3, and the n-th row cardiac hole 11-n (the third row is illustrated and described as an example). .

That is, as shown in Figure 3, by sequentially blasting the first row cardiac hole (11-1) closest to the circumferential portion of the large diameter armed medicine ball 10 so that the breaking force is transmitted to the large diameter armed medicine ball (10) Blasting in the ground with the large diameter armed medicine 10 as a free surface, and then blasting the second row of cardiac holes 11-2 with a certain time difference is formed by the blasting of the first row of cardiac holes 11-1. Blasting occurs through the free surface.

As described above, the blasting starts from a deep hole near the center of the large-caliber armed medicine 10 and performs continuous blasting with a parallax using the free surface formed through the starting blasting.

The pattern of the large-caliber armed medicine 10 and the heart hair hole 11 is, for example, the shape of a quadrangle having four first-row heart hair holes 11-1 having the same cloth spacing around the large-caliber armed medicine 10. Four second row cardiac holes 11-2 are arranged in a quadrangular shape with a predetermined interval from the first row cardiac holes 11-1, and the third row cardiac holes 11-3. ) May also be arranged in the form of a square with a predetermined interval with the second row cardiac hole (11-2). As described above, the large-caliber armed medicine (10) is intended to increase the excavation efficiency and minimize the noise and vibration by blasting while forming a free surface in the ground by blasting the cardiac cavity near.

Here, the heart hole (11) is applied by calculating the dosage range per delay that can comply with regulatory standards, such as noise and vibration by the site "test blasting" results.

In the case of rock excavation for the installation of subway stops or ventilation openings in the city center as in the present invention, in order to prevent the buckling of the upper traffic load and the buckling of the brace 3, the damages such as the pre-installed intermediate piles 2 and the connection part should not occur. In the present invention, the deformation of the middle pile 2 was minimized through the following method.

Using a precision device such as an electron primer, the four medicine cabinets 6 symmetrical to each other around the middle pile 2 as shown in FIG. 5 (the medicine cabinet means for the protection of the middle pile 2) at the same time Line cracks are generated around the rock. In this way, if the specifications of the medicine cabinet (6) around the middle pile (2) blasting at the same time using an electron primer without parallax under the same conditions, the same size of force is applied simultaneously in all directions of the circumference of the middle pile (2) By minimizing the deformation of the intermediate piles (2) to prevent damage to the intermediate piles (2) and the connecting portion and at the same time can generate a line crack in the periphery of the intermediate piles (2), due to the line cracking impact blasting when applying the blasting method Can be minimized.

Here, the rubber pad 7 is wound around the middle pile 2 so that the impact due to the pre-cracking and the main blasting can be reduced in advance. Rubber pad 7 may be in the form of surrounding the intermediate pile (2), the form supported on the inner surface of the pile installation hole (4).

In addition, the explosives for the generation of linear cracks should use precision explosives using the decoupling effect, and the appropriate dosage should be calculated based on the site "test blasting" results.

6 is a view for showing the blasting process according to the present invention, by blasting a plurality of heart blasting holes 11 with a time difference around the large-caliber armed medicine 10 is made of continuous blasting through the newly formed free surface.

Here, when the blasting with a time difference in the order of the first row cardiac hole (11-1), the second row cardiac hole (11-2), the third row cardiac hole (11-3) in the state of (A) step stairs blasting form Free surface condition of is formed.

The circumference of the heart pit (11) is a number of medicinal holes (12) (the pill ball 12 is a punctured around the circumference of the heart pit (11) is to say that the gunpowder is charged, to distinguish from the heart pit (11) It is only called a medicinal hole, and may be the same as the heart hole (11), as compared with the heart hole (11), as shown in Figure 4, the amount of color and gunpowder may vary.) Is formed in various patterns.

The specification of the charge hole 12 (which may also include the heart hole 11) is demonstrated.

The blasting shall be carried out by applying the standard blasting pattern of the "Road Construction Design and Construction Guidance" (2006.12), Ministry of Land, Transport and Maritime Affairs.

Examples of the blasting pattern (TYPE-III, small scale vibration control blasting)

-Drilling depth: 2.7m

-Drilling diameter: Ø 51mm

Minimum Resistance Line: 1.0 m

-Space spacing: 1.2m

-Blasting area of entire station: 1.395㎡, heart rate: 1,165 (excluding armed medicine)

-Standard dose per delay: 1.0㎏

-Explosives: Use of emulsion-based explosives (Ø32mm × 295mm × 0.25㎏)

For example, as shown in Figure 7, when the depth for the installation of the facility "D" divided the excavation depth according to the depth of "D" and "D1 through the blasting operation" d1, d2, d3, d4 " Can blast to depth.

1: sidewall pile, 2: middle pile
3: brace, 4: pile installer
5: perforated plate, 6: medicine cabinet
7: rubber pad, 10: large diameter armed medicine
11: heart ball, 12: medic

Claims (3)

A first step of simultaneously forming a free surface by simultaneously drilling a large-diameter armed medicine 10 when constructing a sidewall pile 1 and a middle pile 2 according to an excavation area of an underground facility including a subway station or a ventilation hole in a downtown area;
The gunpowder is charged by drilling a plurality of heart hair holes 11 around the large diameter armed medicine ball 10 at regular intervals on the circumference of at least one large diameter armed medicine ball 10 on the plane after the first step. The second step of puncturing the gunpowder holes 12 and a plurality of rows at the periphery of the gunpowder, and drilling a plurality of drug packs 6 in the periphery of the intermediate pile to install as an electron primer detonation system and ;
After the second step, while blasting in the order of the nearest cardiac cavities (11) from the closest cardiac cavities (11) formed around the large-caliber armed medicament (10) in the order, while simultaneously blasting the plurality of medicinal medicinal herbs in the excavation during downtown blasting excavation Urban blasting excavation method using a large diameter armed pharmacy and electro-explosive synchronous detonation, characterized in that it comprises a third step to increase the efficiency and minimize the vibration and noise.
The method of claim 1, wherein in the third step, prior to the blasting of the heart hole, a plurality of drug medicine holes (6) symmetrical to each other around the middle pile (2) by applying an electron primer simultaneous detonation system to create a line crack Simultaneously minimizing the deformation of the intermediate pile (2) to prevent damage to the intermediate pile (2) and the connection in advance, the urban rock blasting excavation method using a large diameter armed pharmacy and electron primer simultaneously.
The method of claim 1, wherein in the first step, the urban rock blasting excavation method using a large diameter armed medicine and an electron primer at the same time, characterized in that the rubber pad (7) is installed on the inner surface of the pile installation hole into which the intermediate pile is inserted.

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