KR100948881B1 - Urban blasting method by pre-splitting - Google Patents

Urban blasting method by pre-splitting Download PDF

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KR100948881B1
KR100948881B1 KR1020090081173A KR20090081173A KR100948881B1 KR 100948881 B1 KR100948881 B1 KR 100948881B1 KR 1020090081173 A KR1020090081173 A KR 1020090081173A KR 20090081173 A KR20090081173 A KR 20090081173A KR 100948881 B1 KR100948881 B1 KR 100948881B1
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South Korea
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hole
cutting
blasting
cut
line
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KR1020090081173A
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Korean (ko)
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강형구
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주식회사 은성건설
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D5/00—Safety arrangements
    • F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
    • F42D5/045—Detonation-wave absorbing or damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/06—Relative timing of multiple charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F42D3/04—Particular applications of blasting techniques for rock blasting

Abstract

PURPOSE: A pre-splitting blast method used in urban is provided to reduce noise and vibration by setting a decoupling coefficient of a charge hole which is punched along an excavation expected line as 2~3 and to enable pre-splitting blast in urban. CONSTITUTION: A pre-splitting blast method used in urban comprises the following steps: punching a plurality of cutting holes(110) on an excavation expected line; punching a plurality of blast holes on a blast row which is successively separated to a cut-out area based on excavation expected line; charging the inner part of the cutting hole and the blast hole with an explosive; and setting a decoupling coefficient of a charge hole as 2~3.

Description

도심 선균열 발파공법{URBAN BLASTING METHOD BY PRE-SPLITTING}Urban Blast Cracking Blasting Method {URBAN BLASTING METHOD BY PRE-SPLITTING}

본 발명은 도심 선균열 발파공법에 관한 것으로, 보다 상세하게는 암반 절취작업시 굴착예정선을 먼저 발파한 다음 절취영역을 발파함에 있어, 굴착예정선을 따라 천공된 절취공의 디커플링 계수를 2 ~ 3으로 하여 디커플링에 의한 완충작용에 의해 소음과 진동을 감소시킴으로써 도심에서도 선균열 발파가 가능하도록 한 도심 선균열 발파공법에 관한 것이다.The present invention relates to a downtown cracking blasting method, and more particularly, in blasting the excavation line after blasting a rock cutting operation, and then blasting the cutting area, the decoupling coefficient of the cut hole perforated along the excavation line is 2 ~. In the third aspect, the present invention relates to a urban cracking blasting method that allows crack cracking in urban areas by reducing noise and vibration by buffering action by decoupling.

지하터파기나 사면굴착시 발파로 인한 모암이나 원지반의 균열을 최소화하여 지반의 이완을 방지함으로써 굴착면을 보호하는 다양한 공법으로, 라인 드릴링(line drilling), 스무드 드릴링(smooth drilling), 선균열발파(pre-splitting), 쿠션블라스팅(cushion blasting)등이 소개되고 있다.Various methods to protect the excavation surface by minimizing cracks in the base rock or ground due to blasting during underground excavation or slope excavation. Line drilling, smooth drilling, and line crack blasting Pre-splitting and cushion blasting are introduced.

이 중 선균열발파공법은 모암영역과 절취영역의 경계선인 굴착예정선을 선발파한 다음 절취영역의 내부영역에서 선발파된 굴착예정선 방향으로 절취영역을 순 차적으로 발파하는 공법으로, 굴착예정선을 선절개하기 때문에 파단면이 미려하고 모암의 균열이 적어 이완대의 발생을 최소화할 수 있다는 잇점이 있다.Among them, the line crack blasting method is a method of blasting the excavation target line, which is the boundary line between the mother rock region and the cutting region, and then sequentially blasting the cutting region in the direction of the excavation target line that has been blasted from the inner region of the cutting region. Since the line is incised, the fracture surface is beautiful and there are few cracks in the rock, which can minimize the occurrence of loosening bands.

하지만, 상기와 같은 잇점에도 불구하고, 선균열발파공법은 굴착예정선의 선발파시 발생되는 상당한 진동과 소음으로 인해 도심지나 가축을 사육하는 농가부근에서는 적용할 수 없어, 터널과 같은 인적이 없는 비도심지에서만 널리 적용되고 있을 뿐 도심지에서 실제 시공될 수 없다는 시공범위의 한계점을 노출하고 있다.However, in spite of the above advantages, the line crack blasting method is not applicable to urban centers or farms raising livestock due to the considerable vibration and noise generated during the excavation of excavated ships. It is widely applied only in the U.S., but it exposes the limitations of the construction scope, which cannot be actually installed in urban areas.

본 발명은 상기와 같은 관점에서 안출된 것으로, 본 발명의 목적은 암반 절취작업시 굴착예정선을 먼저 발파한 다음 절취영역을 발파함에 있어, 굴착예정선을 따라 천공된 장약공의 디커플링 계수를 2 ~ 3으로 하여 디커플링에 의한 완충작용에 의해 소음과 진동을 감소시킴으로써 도심에서도 선균열 발파가 가능하도록 한 도심 선균열 발파공법를 제공하는 것이다.The present invention has been made in view of the above, an object of the present invention is to blast the excavation line first during the rock cutting operation and then to blast the cutting area, the decoupling coefficient of the drill hole drilled along the excavation line 2 It is to provide a downtown cracking blasting method that allows the cracking blasting in the city by reducing the noise and vibration by the buffering action by the decoupling to ~ 3.

상기 본 발명의 목적은 모암영역과 절취영역의 경계선인 굴착예정선상에 다수의 절취공을 천공하고, 상기 굴착예정선을 기준으로 절취영역측으로 소정거리 순차적으로 이격되는 발파열상에 다수의 발파공을 천공하는 천공단계와; 상기 절취공 및 발파공 내로 폭약을 장약하는 장약단계를 포함하여 이루어지되, 절취공벽과 장약 사이에 공기층이 존재되하도록 절취공의 디커플링 계수(절취공경/장약경)는 2~3으로 하며, 절취공의 기저에는 뇌관이 연결된 기저장약을 설치하고 그 상측으로는 완충장약을 소정거리 이격하여 설치하되 기저장약과 완충장약은 도폭선으로 연결하고 도폭선과 기저장약 및 완충장약은 테이프로 결합고정되도록 한 것을 특징으로 하여, 상기 절취공을 발파하여 굴착예정선이 절취되게 한 상태에서 절취영역 최내측의 발파열에서 최외측의 발파열 순으로 발파공을 발파하여 절취영역을 발파하는 것을 특징으로 하는 도심 선균열 발파공법을 제공함으로써 달성될 수 있다.The object of the present invention is to drill a plurality of cutting holes on the excavation line, which is the boundary line between the mother rock area and the cutting region, and a plurality of blast holes on the blasting heat spaced apart a predetermined distance to the cutting region side based on the excavation line. A drilling step; Including the charge step to charge the explosives into the cut hole and the blast hole, the decoupling coefficient of the cut hole (cut hole diameter / long hole diameter) is 2 to 3 so that an air layer exists between the cut hole wall and the charge hole, cut hole At the base of the base, install the base storage drug connected with the primer, and install the buffer drug at a distance apart from the upper side, but connect the base storage drug and the buffer drug with the detonation wire, and fix the dopoline, the base storage drug, and the buffer drug with the tape. Characterized in that the blast line by blasting the blast hole in the order of the outermost blast from the innermost blasting to the outermost blasting in the state in which the excavation line is cut by blasting the cutting hole By providing a crack blasting method.

본 발명에 따른 도심 선균열 발파공법은 암반 절취작업시 굴착예정선을 먼저 발파한 다음 절취영역을 발파함에 있어, 굴착예정선을 따라 천공된 장약공의 디커플링 계수를 2 ~ 3으로 하여 디커플링 효과에 의해 소음과 진동을 감소시킴으로써 도심에서도 선균열 발파가 가능하도록 한 효과가 있다.In the city center crack blasting method according to the present invention, when blasting the excavation line first after blasting the rock cutting operation, and then blasting the cutting area, the decoupling coefficient of the drilled hole along the excavation line is set to 2 to 3 to the decoupling effect. By reducing the noise and vibration there is an effect that makes it possible to blast the cracks in the city.

이하, 첨부된 도면을 참고하여 본 발명에 따른 도심 선균열 발파공법을 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the urban line crack blasting method according to the present invention.

첨부된 도1은 본 발명에 따른 도심 선균열 발파공법을 설명하기 위한 평면도이며, 도2는 본 발명에 따른 도심 선균열 발파공법에서 굴착예정선상에 천공된 절취공의 단면도이다.1 is a plan view illustrating the inner city crack blasting method according to the present invention, Figure 2 is a cross-sectional view of the cut hole perforated on the excavation line in the inner city line crack blasting method according to the present invention.

상기 도면을 참고하면, 본 발명에 따른 도심 선균열 발파공법은 천공단계 및 장약단계를 포함한다.Referring to the drawings, the urban crack cracking method according to the present invention includes a drilling step and a charging step.

상기 천공단계는 도1에 도시된 바와 같이 모암영역(A)과 절취영역(B)의 경계선인 굴착예정선(C)상에 다수의 절취공(110)을 천공하는 단계를 포함한다. The drilling step includes drilling a plurality of cutting holes 110 on an excavation schedule line C, which is a boundary line between the mother rock area A and the cutting area B, as shown in FIG.

상기 절취공(110)은 자유면에 대해 수직 또는 사면 안식각으로 천공하며, 절취공의 직경은 예시적이지만 45mm ~ 76mm 으로 하는 데, 길이가 3m 정도인 단공인 경우에는 직경 45mm으로 하고 길이가 6m 정도인 장공인 경우에는 직경 76mm으로 한다. 또한, 절취공 간격은 60cm ~ 80cm 정도로 하는 것이 바람직하며, 절취공의 저항선(절취공에서 후술할 제1열 발파공 간의 거리)은 절취공 간격의 1.2 ~ 2배 정도가 바람직하다.The cutting hole 110 is drilled at a vertical or slope angle of repose with respect to the free surface, and the diameter of the cutting hole is 45 mm to 76 mm, but the diameter of the cutting hole is 45 mm in diameter and 6 m in length when the short hole is about 3 m long. In case of long hole, it should be 76mm in diameter. In addition, the cutting hole spacing is preferably about 60cm ~ 80cm, and the resistance line (distance between the first row blasting hole to be described later in the cutting hole) of the cutting hole is preferably about 1.2 to 2 times the cutting hole spacing.

상기와 같이 절취공(110)을 천공한 다음에는 상기 굴착예정선(C)을 기준으로 절취영역측으로 소정거리 순차적으로 이격되는 발파열상에 다수의 발파공(120)을 천공하는 데, 상기 발파열(D)은 굴착예정선(C)으로부터 절취영역 측으로 절취영역의 넓이에 따라 제1열(D1), 제2열(D2), 제3열(D3) ㆍㆍㆍ으로 형성되며, 각각의 발파열에는 다수의 발파공(120)이 천공된다. 상기 각각의 발파공(120)은 자유면에 대해 수직 또는 사면 안식각으로 천공하며, 발파공의 직경은 예시적이지만 45mm ~ 76mm 으로 하며, 발파공 간격 및 발파공의 저항선은 굴착암반의 상태등에 따라 적절하게 대응하여 형성한다.After drilling the cutting holes 110 as described above, the plurality of blasting holes 120 are punctured on the blasting rows sequentially spaced a predetermined distance toward the cutting region side based on the excavation schedule C. D) is formed in the first row D1, the second row D2, and the third row D3 ... according to the width of the cutting area from the excavation line C to the cutting area. The plurality of blast holes 120 are punctured. Each of the blast hole 120 is perforated at a vertical or slope angle of repose to the free surface, the diameter of the blast hole is 45mm ~ 76mm, but the blast spacing and resistance lines of the blast hole appropriately correspond to the state of the excavated rock Form.

상기와 같이 굴착예정선(C)에 절취공(110)을 천공하고 발파열(D)에 발파공(120)을 천공한 다음에는 상기 절취공(110) 및 발파공(120) 내로 폭약을 장약하는 장약단계를 거친다.As described above, after drilling the cutting hole 110 in the excavation line (C) and the blasting hole 120 in the blasting heat (D), the charge to charge the explosives into the cutting hole (110) and the blasting hole (120) Go through the steps

먼저, 상기 절취공(110)에 폭약을 장약하는 단계를 도2를 참고하여 구체적으로 설명하면, 상기 절취공(110)의 기저에는 뇌관이 연결된 기저장약(111)을 설치하고 그 상측으로는 완충장약(112)을 소정거리 이격하여 설치한다. 여기서, 상기 기저장약(111)은 공심에 따라 심도가 얇은 경우에는 에멀젼계 직경 45mm의 약포를 사용하며 심도가 깊은 경우에는 구속저항을 많이 받게 되므로 상대적으로 직경이 큰 50mm 에멀젼계 약포를 사용하며, 상기 완충장약(112)은 암질에 따라 10 ~ 70cm 간격으로 이격시켜 설치된다. 그리고, 상기와 같은 기저장약(111)과 완충장약(112)은 도폭선(113)으로 연결하고 도폭선(113)과 기저장약(111) 및 완충장약(112)은 테이프로 결합고정되며, 각각의 절취공(110)에 설치된 기저장약(111)은 뇌관각선(111-1)을 통해 서로 연결되어 있다.First, the step of charging the explosives in the cut hole 110 will be described in detail with reference to Figure 2, the base of the cut hole 110 is installed base storage medicine 111 connected to the primer and the upper side The buffer charge 112 is installed at a predetermined distance apart. Here, when the depth of storage according to the core depth is thin, using the medicine of the emulsion diameter 45mm diameter, and if the depth is deep, since a lot of restraint resistance is received, use a relatively large diameter 50mm emulsion medicine , The buffer charge 112 is installed spaced apart at intervals of 10 ~ 70cm depending on the cancer. In addition, the above-described storage drug 111 and the buffering agent 112 is connected to the doppo line 113, and the doppo line 113 and the storage agent 111 and the buffering agent 112 are fixed and bonded by tape, respectively. The preservative medicine 111 installed in the cutting hole 110 is connected to each other through the primer line 111-1.

여기서, 본 발명의 특징은 절취공벽과 장약 사이에 공기층(114)이 존재하도록 절취공(110)의 디커플링 계수는 2~3으로 하는 것과, 완충장약을 하는 것이다. 상기 디커플링 계수란 절취공경/장약경의 비율로서 본 발명에 따르면 장약경에 비해 절취공경이 2 ~ 3배 크기(일례로 장약포의 직경이 25mm인 경우 절취공의 직경이 50mm ~ 75mm)때문에 절취공벽과 장약 사이에 공기층이 존재하게 된다. Here, the feature of the present invention is that the decoupling coefficient of the cutting hole 110 is 2 to 3 so that the air layer 114 is present between the cutting hole wall and the charging, and buffer charging. According to the present invention, the decoupling coefficient is the ratio of the cutting hole diameter to the cutting hole diameter, and according to the present invention, the cutting hole wall has a cut hole diameter of 2 to 3 times larger (for example, the diameter of the cutting hole is 50 mm to 75 mm when the diameter of the medicine cloth is 25 mm). There is an air layer between the charge and the charge.

또한, 상기 완충장약이란 폭약과 폭약을 서로 이격시킴으로써 폭약 사이에 빈 공간이 유지되도록 설치하는 장약으로, 폭약의 폭굉시 상기 공간에서 체적팽창 과 전달속도가 감속되도록 하여 폭약의 파괴력을 완화시키는 작용을 하게 된다. 이 때, 상기 도폭선(113)에 테이프(T)를 통해 결합고정된 기저장약(111)과 완충장약(112)이 절취공(110) 내에서 서로 이격되어 설치되도록, 상기 도폭선(113)의 일단이 절취공의 외부에 고정된 고정끈(R)의 타단에 묶어 매달려 있도록 한다.In addition, the buffer charge is a charge that is installed so that the empty space is maintained between the explosives by exploding the explosives and explosives to each other, and when the explosives of the explosives to decrease the volume expansion and delivery speed in the space to mitigate the destructive force of the explosives Done. At this time, the base storage agent 111 and the buffering agent 112, which are fixed and coupled to the dopant wire line 113 through the tape T, are installed to be spaced apart from each other in the cutout hole 110. One end is tied to the other end of the fixed strap (R) fixed to the outside of the cutting hole to hang.

이와 같이 절취공벽과 장약 사이 및 완충장약 사이의 빈공간에 공기층(114)이 존재하면, 공기층의 완충효과에 의해 폭약의 충격파가 완화됨과 더불어 절취공벽에 고르게 분산됨으로써 모암측에 전달되는 충격파의 진동을 최소화하여 모암이나 원지반의 균열을 최소화할 수 있으며, 절취공과 절취공 사이에서는 인접하는 절취공에 대해 서로 반대방향으로 탄성파가 전달되면서 공과 공사이의 거리에 최소한의 인장파괴에 의한 선균열면을 형성하게 되는 것이다.As such, when the air layer 114 is present in the empty space between the cutting hole and the charge and the buffer charge, the shock wave of the explosive is alleviated by the buffering effect of the air layer, and the vibration of the shock wave transmitted to the mother rock side by being evenly distributed on the cutting hole wall. To minimize the cracks in the mother rock or the ground, and between the cut holes and the cut holes, the elastic waves are transmitted in opposite directions to the adjacent cut holes to form a linear crack surface due to the minimum tensile breakage at the distance between the holes and the cut holes. Will be.

또한, 본 발명에 따르면 상기 절취공(113)의 상단 영역은 모래나 자갈과 같은 메지(115)에 의해 전색되는 데, 이는 상기 메지(115)가 절취공(110)의 입구를 전색함으로써 절취공(110)내에서 발생하는 충격파에 의한 소음이 상기 메지에 막혀 외부로 방출되지 않도록 하기 때문이다. In addition, according to the present invention, the upper region of the cut hole 113 is colored by a mage 115 such as sand or gravel, which is cut by the mage 115 colorizing the inlet of the cut hole 110. This is because noise caused by shock waves generated within 110 is blocked by the message and is not emitted to the outside.

여기서, 상기 메지 전색은 도3에 도시된 바와 같은 절취공의 개방된 외면에 지지되는 십자가 형상의 지지바(116)와, 컵 형상의 받침대(117)와, 상기 지지바와 받침대를 연결하는 연결바(118)를 포함하는 구성되는 메지홀더(119)를 통해 바람직하게 구현될 수 있다. Here, the message color is a cross-shaped support bar 116 supported on the open outer surface of the cutting hole as shown in Figure 3, the cup-shaped pedestal 117, the connecting bar connecting the support bar and the pedestal It may be preferably implemented through the message holder 119 is configured to include a (118).

따라서, 상기 메지홀더(119)를 절취공(110)의 상단으로 투입하여 상기 지지바(116)가 절취공(110)의 외면에 지지되고 받침대(117)가 상기 절취공(110) 내부에 배치되게 한 상태에서 메지(115)를 상기 절취공으로 투입하면 메지가 상기 받침대 상측으로 충진됨으로써 상기 절취공(110)의 상단 영역이 메지에 의해 전색될 수 있게 된다. 한편, 절취공의 상단 영역만을 메지로 전색하고 절취공 내부 영역은 메지로 전색하지 않은 이유는, 절취공 내부영역까지 메지로 전색한 경우에는 절취공벽과 장약 사이에 공기층이 메지로 전색되어서 디커플링에 의한 완충효과를 기대하기 어렵기 때문이다. 또한, 상기 메지의 의해 전색되는 부분은 절취공경의 10 ~ 20배 인 것이 소음차단면에서 바람직하다.Therefore, the support holder 119 is inserted into the upper end of the cutting hole 110 so that the support bar 116 is supported on the outer surface of the cutting hole 110 and the pedestal 117 is disposed inside the cutting hole 110. When the message 115 is introduced into the cutting hole in a state in which it is made, the upper area of the cutting hole 110 may be colored by the message by filling the message into the upper side of the pedestal. On the other hand, when only the upper area of the cutout is colored into the message and the inside of the cutout is not changed into the message, the air layer is transferred to the decoupling between the cutout wall and the charge when it is transferred to the cutout. This is because it is difficult to expect a buffering effect. In addition, the portion to be colored by the message is preferably 10 to 20 times the cutting pore diameter in terms of noise blocking.

이와 같이, 절취공내로 폭약을 장약한 다음에는 발파공(120)에 폭약을 장약하게 되는 데, 상기 발파공의 폭약 장약은 일반적인 선균열 발파공법에서와 같이 에멀젼계 약경 50mm 약포를 장약하거나 벌크타입의 장약시 이의 장약량 대비 약 50%정도로 일반장약하게 된다.As such, after the explosive is charged into the cut hole, the explosive is charged into the blasting hole 120. The explosive charge of the blasting hole is filled with an emulsion-based medicine diameter 50 mm medicine or bulk type medicine as in the general linear cracking blasting method. It will be about 50% of the city's charge.

이상과 같이, 천공단계와 장약단계를 통해 본 발명에 따른 도심 선균열 발파공법은 완료되며, 모암영역(A)과 절취영역(B)의 경계선인 굴착예정선(C)상에 천공된 다수의 절취공(110)에 대해 뇌관각선을 이용하여 기저장약(111)의 뇌관을 폭파 시키면 기저장약(111)에 연결된 도폭선(113)을 통해 완충장약(114)이 순차적으로 폭발되면서 굴착예정선(C)상이 선절취되고, 이 후에는 절취영역의 최내측의 발파열에서 최외측의 발파열 순으로 발파공(120)을 발파하여 절취영역을 발파하게 된다. 이 때, 절취영역의 발파시에 발생하는 폭력은 선균열면에 이르러 탄성파의 속도가 완화되고 폭발에너지가 감쇠되어 모암영역으로의 탄성파 전파를 차단하여, 모암의 균열이 없이 이완대의 발생을 최소화할 수 있게 된다.As described above, the urban crack cracking method according to the present invention is completed through the drilling step and the charging step, and a plurality of holes drilled on the excavation scheduled line C which is a boundary line between the mother rock area A and the cutting area B. When detonating the detonator of the previously stored medicine 111 by using a primer angle on the cutting hole 110, the buffered medicine 114 is sequentially exploded through the dopant line 113 connected to the previously stored medicine 111, and is expected to be excavated. Phase (C) is precut, and after that, the blasting holes 120 are blasted in the order of the innermost blasting from the innermost blasting to the outermost blasting to blast the cutting area. At this time, the violence generated during the blasting of the cutout area reaches the linear crack surface, and the velocity of the elastic wave is alleviated and the explosion energy is attenuated to block the propagation of the elastic wave to the mother rock area, thereby minimizing the occurrence of loose bands without cracking the mother rock. Will be.

이상과 같은 본 발명에 따른 도심 선균열 발파공법의 잇점을 정리하면 다음과 같다.The advantages of the urban crack cracking method according to the present invention as described above are as follows.

첫째, 선균열공인 절취공내에서 장약의 직경이 공직경 보다 작게 한 디커플링에 의해 절취공벽과 장약 사이에는 공기층이 존재하게 되는 데, 상기 공기층의 완충효과에 의해 폭약의 충격파가 완화됨과 더불어 절취공벽에 고르게 분산됨으로써 모암측에 전달되는 충격파의 진동을 최소화하여 모암이나 원지반의 균열을 최소화할 수 있다.First, an air layer exists between the cutting hole wall and the charge by decoupling in the cutting hole, which is a pre-cracking hole, which is smaller than the pore diameter. Since it is evenly distributed, the vibration of shock waves transmitted to the mother rock side can be minimized to minimize the cracking of the mother rock or the ground.

둘째, 기저장약 및 완충장약은 도폭선으로 서로 연결되는 데, 상기 도폭선은 장약과 장약의 신호전달용으로 사용되므로 기저장약의 폭압에 의해 완충장약이 폭파되지 않은 사압현상을 방지할 수 있다는 잇점이 있다.Second, the storage agent and the buffering agent are connected to each other by the dopant line, and since the dopant is used for the signal transmission of the charge and the drug, it is possible to prevent the dead-pressure phenomenon in which the buffering agent is not blown up by the pressure of the storage agent. There is this.

셋째, 메지홀더를 통해 절취공의 상단만을 메지로 전색함으로써 절취공의 내부가 디커플링 가능하게 시공할 수 있을 뿐만 아니라 폭파시 소음이 외부로 발산되는 것을 방지하여 도심에서도 선균열발파공법을 구현할 수 있도록 한 잇점이 있다.Third, not only the inside of the cutout can be decoupled by coloring the upper end of the cutout through the message holder, but also to prevent noise from being emitted to the outside during the blasting, so that the crack cracking method can be implemented even in the city. There is one advantage.

도1은 본 발명에 따른 도심 선균열 발파공법을 설명하기 위한 평면도이며, 1 is a plan view for explaining the urban crack cracking method according to the invention,

도2는 본 발명에 따른 도심 선균열 발파공법에서 굴착예정선상에 천공된 절취공의 단면도이며,Figure 2 is a cross-sectional view of the cut hole perforated on the excavation line in the urban crack cracking method according to the present invention,

도3은 본 발명에 사용되는 메지홀더의 사시도이다.Figure 3 is a perspective view of the mat holders used in the present invention.

Claims (4)

모암영역과 절취영역의 경계선인 굴착예정선상에 다수의 절취공을 천공하고, 상기 굴착예정선을 기준으로 절취영역측으로 소정거리 순차적으로 이격되는 발파열상에 다수의 발파공을 천공하는 천공단계와; 상기 절취공 및 발파공 내로 폭약을 장약하는 장약단계를 포함하여 이루어지되,Perforating a plurality of cutting holes on an excavation scheduled line, which is a boundary line between the mother rock region and the cutting region, and drilling a plurality of blasting holes on a blasting heat spaced sequentially by a predetermined distance to the cutting region side based on the excavated scheduled line; Including the charge step to charge the explosives into the cut hole and blast hole, 절취공벽과 장약 사이에 공기층이 존재하도록 절취공의 디커플링 계수(절취공경/장약경)는 2~3으로 하며, 절취공의 기저에는 뇌관이 연결된 기저장약을 설치하고 그 상측으로는 완충장약을 10cm 내지 70cm 간격으로 이격설치하되 기저장약과 완충장약은 도폭선으로 연결하고 도폭선과 기저장약 및 완충장약은 테이프로 결합고정되며, 각각의 절취공에 설치된 기저장약은 서로 뇌관각선을 통해 연결된 것으로서, 상기 절취공을 발파하여 굴착예정선이 절취되게 한 상태에서 절취영역 최내측의 발파열에서 최외측의 발파열 순으로 발파공을 발파하여 절취영역을 발파하되,The decoupling coefficient of the cut-out hole (cutting hole diameter / long-opening diameter) should be 2 to 3 so that an air layer exists between the cutting hole wall and the charge, and a base storage agent with a primer connected to the base of the cutting hole is installed. Installed at 10cm to 70cm intervals, the storage agent and buffering agent are connected by dopyeokdo, and the dopoline, the storage and buffering agent are fixed by tape, and the storage agent installed in each cut hole is connected to each other through primer line. While blasting the cutting holes, the blasting line is blasted in the order of blasting from the innermost blasting to the outermost blasting in the state where the excavating line is cut. 상기 절취공의 직경은 절취공의 길이가 3m 단공인 경우에는 45mm이고 절취공의 길이가 6m 장공인 경우에는 76mm이며, 상기 절취공 간격은 60cm 내지 80cm이며,The cut holes have a diameter of 45 mm when the cut holes have a length of 3 m and a cut hole length of 76 mm when the cut holes have a length of 6 m. The cut hole spacing is 60 cm to 80 cm. 절취공의 개방된 외면에 지지되는 십자가 형상의 지지바와, 컵 형상의 받침대와, 상기 지지바와 받침대를 연결하는 연결바를 포함하는 구성되는 메지홀더를 상기 절취공의 상단으로 투입하여 상기 지지바가 절취공의 외면에 지지되고 받침대가 상기 절취공 내부에 배치되게 한 상태에서 메지를 상기 절취공으로 투입하여 메지가 상기 받침대 상측으로 충진되게 함으로써 상기 절취공의 상단 영역은 메지에 의해 전색되게 하며,The support bar is cut by inserting a support holder having a cross-shaped support bar supported on the open outer surface of the cutting hole, a cup-shaped pedestal, and a connecting bar connecting the support bar and the pedestal to the upper end of the cut-out hole. It is supported on the outer surface and the pedestal is placed in the cutting hole in the state that the message is inserted into the cutting hole so that the filling of the message above the pedestal so that the upper area of the cutting hole is colored by the matage, 상기 도폭선에 결합고정된 기저장약과 완충장약이 절취공 내에서 서로 이격되어 설치되도록, 상기 도폭선의 일단이 절취공의 외부에 고정된 고정끈의 타단에 묶어 매달려 있도록 한 것을 특징으로 하는 도심 선균열 발파공법.Inner city cracks, characterized in that one end of the dopyeon is tied to the other end of the fixed strap fixed to the outside of the cutting hole so that the fixed storage device and the buffer charge fixed to the dopung line is installed spaced apart from each other in the cutting hole Blasting method. 삭제delete 삭제delete 제1항에 있어서,The method of claim 1, 상기 메지의 의해 전색되는 부분은 절취공경의 10 ~ 20배 인 것을 특징으로 하는 도심 선균열 발파공법.Inner portion of the pre-crack blasting method, characterized in that the portion is colored by 10 to 20 times the cutting pore diameter.
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Publication number Priority date Publication date Assignee Title
CN109798813A (en) * 2019-01-30 2019-05-24 中南大学 A kind of lateral caving blasthole structure and lateral caving method
CN111854549A (en) * 2020-07-30 2020-10-30 四川港航建设工程有限公司 Large rock foundation pit blasting excavation system and construction method
CN111854549B (en) * 2020-07-30 2023-04-28 四川港航建设工程有限公司 Blasting excavation system for large-scale rock foundation pit and construction method
KR102267077B1 (en) * 2020-09-28 2021-06-17 에스케이에코플랜트(주) Excavation length improved tunnel blasting method using hole size adjustment
KR102267078B1 (en) * 2020-09-28 2021-06-18 에스케이에코플랜트(주) Center cut part multiplexing type tunnel blasting method
KR102262356B1 (en) * 2020-11-13 2021-06-07 임대규 Charging module for realization of controlled blasting of open-air part
KR102350514B1 (en) * 2021-01-18 2022-01-12 노정일 Method for Blasting Rock Utilizing Air Deck and Decoupling

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