KR101617401B1 - Explosive container and setting and blasting method thereof - Google Patents

Explosive container and setting and blasting method thereof Download PDF

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Publication number
KR101617401B1
KR101617401B1 KR1020150146943A KR20150146943A KR101617401B1 KR 101617401 B1 KR101617401 B1 KR 101617401B1 KR 1020150146943 A KR1020150146943 A KR 1020150146943A KR 20150146943 A KR20150146943 A KR 20150146943A KR 101617401 B1 KR101617401 B1 KR 101617401B1
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South Korea
Prior art keywords
charge
container body
explosive
groove
cap
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KR1020150146943A
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Korean (ko)
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주영옥
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원하티앤알비(주)
주영옥
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Priority to KR1020150146943A priority Critical patent/KR101617401B1/en
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Publication of KR101617401B1 publication Critical patent/KR101617401B1/en

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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/02—Arranging blasting cartridges to form an assembly
    • 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
    • F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention provides an explosive vessel and its construction and blasting method installed between charges in the charge vessel to disperse and charge the charge inside the charged vessel drilled on the rock surface, And a cap which is openably and closably coupled to at least one end of the container body for charging the container body with the container body, wherein the cap body is connected to one end of the container body And an outer end of the cap corresponding to the primer groove is formed in the end of the coupling protrusion so that one end of the other container can be engaged with the inner surface of the coupling protrusion And a fastening groove. According to the present invention, a much smaller amount of explosive is used than in the prior art, and by connecting these dispersed charged layers to increase the width, the same fracturing effect as in the conventional method can be obtained. In addition, it is possible to further reduce the noise and vibration of the blast hole due to the explosion of the charge due to the air layer formed between the upper layer of the charge and the lower layer of the charge.

Description

[0001] EXPLOSIVE CONTAINER AND SETTING AND BLASTING METHOD THEREOF [0002]

The present invention relates to a bomb container and a method of constructing and blasting the bomb container. More particularly, the present invention provides at least one container case having a predetermined length and diameter for accommodating explosives, And a blasting method for distributing charge distribution by arranging it between charges.

Generally, explosives, which are mainly used in blasting work for building and rock breaking, can not control the explosion power. Therefore, the vibration generated during explosion is transferred to the surrounding environment and cracks ), And there was a serious problem such as an excessive noise due to the explosion.

In order to solve these problems, crushing methods using a non-vibrating blasting machine such as an expandable crushing machine, a micro vibrating crusher and a hydraulic jack have been developed and are generally used in the industrial field.

However, the above methods have disadvantages in their own way.

First, the expandable crushing method (refer to Korean Patent Registration No. 0087640) is to crush rock through the force that is expanded during curing by using the silicate of lime as the main material. It does not cause vibration and noise, It is difficult to use it at all during the rainy season and the winter season due to the characteristics of the material.

Next, the method of using a micro vibrating crusher (refer to Korean Utility Model Registration No. 0319953) uses a high-temperature and high-pressure expansion force, does not generate vibration, and has a merit that it can be partially broken, The construction method is not able to perform the blasting itself if it is not able to perform precisely the full color at the cracked rock bed or the construction, especially when the blast is scattered, the risk of safety accident is large. In addition, in the case of cement mortar used to form a full color, a curing time of 30 to 60 minutes or more is required after the installation, which results in a problem that the working efficiency is lowered.

In addition, a crushing method using a hydraulic jack (refer to Korean Patent No. 1439974) uses a principle in which a chain is expanded by operating a hydraulic wedge after inserting a metal wedge after perforating the rock, and vibration and scattering In particular, although the construction is safe and convenient, there is a disadvantage in that the above method requires a second crushing and is not applicable to a large-scale site due to low constructability.

The present invention has been developed in order to overcome the above-mentioned problems, and it is an object of the present invention to provide a explosive vessel capable of reducing the vibration and noise of blasting pollution, reducing blasting seams after blasting, And a blasting method.

According to the present invention, there is provided a bomb container and its construction and blasting method installed between charges placed inside the charge bomb to disperse and charge the charge in the bomb drilled in the rock surface, The explosive vessel includes a container body having a space of a predetermined size for accommodating a charge and a cap which is openably and closably connected to at least one end of the container body for charging the space with the charge, And the outer end of the plug corresponding to the primer groove is connected to the end of the plug so that one end of another container can be coupled to the end of the plug, And a concave engagement groove recessed inwardly of the engagement projection.

For example, the container body is composed of one outer body and one inner body slidably inserted into the outer body. At the corresponding ends of the outer body and the inner body, A groove and a projection may be respectively formed to enable the engagement.

According to the present invention, the container body has a structure in which one end is sealed and the other end is opened so that the stopper is openably / closably engaged or both ends are opened so that the stopper can be opened and closed. A fastening protrusion is formed at one end of the fastening groove of the plug for making interference or screw connection, and when the both ends of the fastening groove are open, A hole may be formed in the bottom surface of the primer groove so that a wire extending from the primer can pass therethrough and a wire having passed through the hole may be inserted into the primer hole through a corresponding groove in the primer groove, As shown in FIG.

The explosive vessel of the present invention is interposed between the charge in the charge hole and separated into an upper charge section and a lower charge section, and one or more charge support plates are respectively provided on the upper and lower surfaces of the container body, And the lower load reservoir supports the lower load part and the upper load part and the lower load part are separated from each other to form an air layer having a certain size between the upper part and the lower part of the load and at the same time, Wherein the charge support plates are integrally formed on the surface of the container body or are installed by inserting one or more fastening means respectively on the surface of the container body positioned at the upper and lower ends of the respective charge support plates, The fixing means is a ring-shaped member having an elastic force and a frictional force Member is provided.

As described above, according to the present invention, the explosive vessel is interposed between the charges in the charge holes punctured on the rock surface to disperse the charges into the charge upper layer portion and the lower charge portion, respectively, By connecting these dispersed charged charge layers to increase the width, it is possible to achieve substantially the same crushing effect as in the conventional method. In addition, it is possible to further reduce the noise and vibration of the blast hole due to the explosion of the charge due to the air layer formed between the upper layer of the charge and the lower layer of the charge.

Fig. 1 is a perspective view of the explosive vessel, Fig. 1b is a first installation state of the explosive vessel, Fig. 1c is a second installation of the explosive vessel, FIG. 1D is a third installation state of the explosive vessel, and FIG. 1E is a fourth installation state of the explosive vessel.
Fig. 2 is a first modification of the explosive device of Fig. 1, Fig. 2a is an exploded perspective view of the explosive device, Fig. 2b is a first installation state of the explosive device, and Fig. 2c is a second installation state of the explosive device.
FIG. 3 is an exploded perspective view of the explosive vessel, FIG. 3b is a first installation state of the explosive vessel, and FIG. 3c is a second installation state of the explosive vessel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, the following embodiments will be given the same reference numerals for the same or similar components throughout the specification, and the detailed description thereof will not be repeated.

Fig. 1 is a perspective view of the explosive vessel, Fig. 1b is a first installation state of the explosive vessel, Fig. 1c is a second installation of the explosive vessel, FIG. 1D is a third installation state of the explosive vessel, and FIG. 1E is a fourth installation state of the explosive vessel.

As shown in the drawings, the explosive vessel of the present invention is constructed so as to accommodate a charge (T) and a primer (D) in a case structure having a constant diameter and length and has one end sealed and a charge And a cap 12 which is openably and closably coupled to the other end of the container body 10 for charging the container body 10 with space therein.

The cap 12 is configured to be able to engage with the other end of the container body 10, preferably the rear end of the body 10, in an interference fit or a screw engagement manner, 12 is formed at the end of the engaging projection 12a with a primer groove 12c so that a primer D as a charge abatting means is mounted inside the container. The surface of the engaging projection 12a may be in the form of having a thread corresponding to the rear end of the container body 10 as shown in Fig. The outer end of the cap 12 corresponding to the main groove 12c is formed with a concave engagement groove 12b (see FIG. 1B) recessed inwardly of the engaging projection 12a, The front end of the container body 10 is fitted.

The front end of the closed body of the explosive device of the present invention, that is, the front end of the container body 10, can be fastened or screwed into the fastening groove 12b of the cap 12, The front end of the container body 10 may be provided with a spiral protrusion 11 corresponding to the fastening groove 12b of the stopper 12 as shown in Fig. As a result, as shown in FIG. 1D, the explosive vessel of the present invention can continuously connect a plurality of container bodies 10 by a desired length. On the other hand, although not shown, a hole may be formed in the bottom surface of the primer groove 12c so that a wire L extending from the primer D can pass therethrough, And extends out of the charge hole H through the fastening groove 12b corresponding to the groove 12c.

The explosive vessel of the present invention is for dispersing the charge T in the charge hole H to disperse the charge T therein. In order to disperse the charge T filled in the charge hole H, It is installed in a form interposed between the charge (T) inside the hole (H), and separates it into the upper layer of charge and the lower layer of charge. For this installation, the explosive vessel may be provided with one or more charge support plates P 1 and P 2 at the top and bottom of the surface of the vessel body 10, respectively, and the upper charge support plate P 1 may support the charge upper layer And the lower charge support plate P 2 supports the lower load part so that the upper and lower load parts of the charge T are separated from each other to form an air layer having a constant size between the upper and lower parts of the charge T. [ This air layer serves to disperse the charge concentration inside the charge space, thereby reducing vibration and noise caused by charge explosion, and also reducing the number of cracks after blasting.

The symbol "S", which is not shown in the figure, indicates that a certain amount of explosive is put into a perforated charge ball and a full color is formed by filling it with a mage (sand, etc.). Generally, the function of "full color" is to prevent the flame from scattering during the first blasting, and to increase the explosive power by causing the second explosive to blow off from the inside (middle) without protruding out.

The explosive vessel of the present invention is characterized in that the charge receptacles (T) inside the charge hole H are dispersed and supported by the charge upper plate P 1 and the lower charge reserve plate P 2 to the charge upper layer portion and the charge lower layer portion, (10) connects the upper floors with the lower floors. In this way, the concentrated explosive in the charge space is dispersed and arranged to reduce the total explosive amount compared to the existing charge amount, thereby further reducing the vibration of the blast hole. Further, the explosive container of the present invention, The zooming effect can be maximized.

Further, this charge, a support plate (P 1) (P 2) is at the lower end of the container body 10 to the surface but may be formed integrally, when bound by an illustration of Figures 1a and 1b, the container body 10 The installation of the charge support plates P 1 and P 2 is performed by fitting at least one fixing means R 1 and R 2 on the surface of the container body 10 located at the upper and lower ends of the respective charge holders . The fixing means R 1 and R 2 may be a ring-shaped member made of rubber or silicon having elasticity and frictional force at the same time. The loading support plate P 1 (P 2 ) It is possible to maintain the stable engagement state without moving in the downward direction of the container body 10 by the load.

The explosive vessel of the present invention is not limited to the use of a plurality of vessels connected vertically as shown in FIG. 1d, but also a plurality of individual vessels may be spaced apart at regular intervals above and below as shown in FIG. Layer, and by forming a plurality of air layers between the plurality of charge layers formed through the layers, the blasting noise and vibration due to charge explosion can be further reduced.

Meanwhile, the explosive vessel of the present invention may be installed outside by removing the primer from the container body as shown in FIG. 1E, and in this case, the blasting performance may be substantially the same. In this case, though not shown, the engaging projection 12a of the stopper 12 may be provided with a structure in which the main groove 12c is removed, unlike the drawing.

Fig. 2 is a first modification of the explosive device of Fig. 1, Fig. 2a is an exploded perspective view of the explosive device, Fig. 2b is a first installation state of the explosive device, and Fig. 2c is a second installation state of the explosive device.

In this embodiment, the container body 10 'of the explosive vessel can be configured to be opened and closed by the upper stopper 11' and the lower stopper 12 in the form of opening the upper end and the lower end, respectively. The upper stopper 11 'and the lower stopper 12 have engaging protrusions 11b and 12a which are engaged with the opposite ends of the container body 10', that is, the front and rear ends of the body, respectively, in an interference fit or a screw engagement manner. The surfaces of the engaging projections 11b and 12a may be in the form of threads having corresponding to the front end and the rear end of the container body 10 as shown in FIG.

The main stopper 12c is formed at the end of the engaging projection 12a of the lower stopper 12 so that a primer D as a charge igniting means is mounted inside the container. The lower stopper 12, corresponding to the primer groove 12c, As shown in FIG. 1B, the outer end of the other explosive container is composed of an engaging groove 12b concaved inwardly of the engaging projection 12a so that the front end of another explosive vessel, preferably the front end of the upper plug 11 ', is fitted. The front end of the upper stopper 11 'can be fastened or screwed into the fastening groove 12b of the lower stopper 12 of another explosive container. In particular, the upper stopper 11' The front end of the lower stopper 12 may be provided with a structure having a helical protrusion 11a corresponding to the fastening groove 12b of the lower stopper 12 as shown in Fig. As a result, as shown in FIG. 2C, the explosive vessel of the present invention can continuously connect a plurality of container bodies 10 'by a desired length. On the other hand, although not shown, a hole may be formed in the bottom surface of the primer groove 12c so that a wire L extending from the primer D can pass therethrough, And extends out of the charge hole H through the fastening groove 12b corresponding to the groove 12c.

In this embodiment, as shown in FIG. 2A, in order to separate the charge (T) in the charge hole from the charge upper layer and the lower charge layer, the explosive container is provided with one or more charge support plates P 1) (P 2) can be provided with a, this upper part of the charges (T) of the upper charge, a support plate (P 1) is supporting the charge, the upper part and the lower charge, a support plate (P 2) is to support the charge, lower layer portion through the The lower part is spaced apart from each other and the upper part of the charge is connected to the lower part of the charge through the container body 10 ', and an air layer of a certain size is formed between the upper part of the charge and the lower part of the charge. As described above, the air layer functions to disperse the charge concentration inside the charge hole, thereby reducing the vibration and noise of the blast hole caused by charge explosion, and also reducing the fractured stone after blasting.

In addition, although the charged support plates P 1 and P 2 may be integrally formed on the surface of the container body 10 ', according to the example of FIGS. 2A and 2B, the upper and lower ends of the container body 10' Charge the support plate (P 1) (P 2) of the installation, each of the charge, a support plate (P 1) (P 2), the "phase, of the top cap (11 to over into the bottom of the state of) the container body 10 'in the And the lower stopper 12 can be respectively coupled and fixed so that the charge support plate P 1 (P 2 ) does not move up and down the container body 10 'due to the load of the charge T So that a stable coupled state can be maintained.

As described above, the explosive vessels disperse the explosives concentrated in the inside of the charge pile to the upper and lower charge levels, and use a much smaller amount of explosive. However, by increasing the width by connecting these dispersed charge layers, Substantially the same crushing effect can be obtained. In this case, it is desirable to set the decoupling index to about 2.5 or less, thereby reducing the amount of charge and improving the overall width. In addition, it is possible to further reduce the noise and vibration of the blast hole due to explosion of the charge by the air layer formed between the upper layer of the charge and the lower layer of the charge.

FIG. 3 is an exploded perspective view of the explosive vessel, FIG. 3b is a first installation state of the explosive vessel, and FIG. 3c is a second installation state of the explosive vessel.

According to the present embodiment, the explosive vessel may be constituted by an outer body 10a and an inner body 10b into which the container body is slidably inserted into the outer body. Corresponding grooves 13a and protrusions 13b are selectively formed at the corresponding ends of the outer body 10a and the inner body 10b so that they can be engaged with each other when the inner body 10b is slidably drawn out. The grooves 13a and the protrusions 13b are not limited to those shown in Fig. 3B but may be formed in correspondence with each other between the outer body 10a and the inner body 10b. In addition, one end of the outer body 10a and one end of the inner body 10b, which form both ends of the container body, may be respectively opened and closed at both ends by a cap as in Fig. 2 , The end portion of the outer body 10a may be configured to be hermetically sealed as shown in FIG. 3, and the end portion of the inner body 10b may be provided with a structure in which the stopper 12 is openably coupled.

For example, as shown in FIG. 2, both ends of the container body, that is, the end portion of the outer body 10a and the end portion of the inner body 10b are coupled to each other by means of a stopper (not shown) (P 1 ) (P 2 ) can be stably fixed by fastening the plugs with the loading support plates P 1 (P 2 ) sandwiched between the ends of the loading support plates (P 1 ) 10b. In the structure illustrated in FIG. 3, as shown in FIG. 1, the loading support plate P 1 (P 2 ) is attached to both end portions of the container body, that is, the end portions of the outer and inner bodies 10a and 10b, One or more fastening means R 1 and R 2 are respectively fitted and placed on the surfaces of the outer and inner bodies 10a and 10b on which the upper and lower ends of the support plates P 1 and P 2 are located, 1 ) (P 2 ) do not move in the upward and downward directions of the container body 10 due to the load of the charge T, so that the stable engagement state is maintained. Of course, in this case as well, the fixing means R 1 and R 2 may be a ring-shaped member made of rubber or silicon having both elastic force and frictional force.

2, when the upper end of the outer body 10a and the end of the inner body 10b are both opened (not shown), the upper stopper 11 ' And the lower stopper 12, so that detailed description of each stopper in this case is omitted. 3, when the end of the outer body 10a is closed and the end of the inner body 10b is open, the stopper 12 may be identical to the stopper of FIG. 1 and the inner body 10b Or may be coupled to the end of the housing by an interference fit or a screw connection. A main groove 12c is formed at the end of the engaging projection 12a of the cap 12 which is fitted into the inner body 10b so that a primer D as a charge igniting means is mounted in the container, A concave engaging groove 12b is formed in the outer end of the engaging projection 12a so as to fit the end of the outer body 10a of another container. The end of the hermetically sealed outer body 10a may be configured to be coupled to the engagement groove 12b of the stopper 12 in an interference fit or a screw engagement manner and preferably the engagement groove 12b of the stopper 12, A spiral protrusion 11 is formed at the end of the body 10a so as to be screw-engaged with the body 10a. Thus, through this configuration, the explosive vessel can be continuously connected for a desired length.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims.

Claims (7)

An explosive vessel installed between charges in the charge vessel for dispersing the charge in the charged vessel drilled on the rock surface,
A container body having a space of a predetermined size for accommodating a charge; and a cap which is openably and closably coupled to at least one end of the container body for charging a charge to the space, And the other end of the cap corresponding to the coupling protrusion of the cap is composed of a coupling groove recessed inwardly of the coupling protrusion so that one end of another container can be engaged,
Wherein the container body has a structure in which one end is sealed and the other end is opened so that the stopper is openable and closable or both ends are opened so that the stopper can be opened and closed, A fastening protrusion is formed in the fastening groove of the cap so that the fastening protrusion is formed in the fastening groove of the cap and the fastening protrusion is formed in the other cap so that the fastening protrusion can be tightened or screwed to the cap having the fastening groove And,
And an upper loading support plate for supporting the loading upper part and a lower loading loading part for supporting the loading upper part and the upper loading loading part in the upper part and lower loading part of the container body, The support plate supports the lower load part and the upper load part and the lower load part are separated from each other to form an air layer having a constant size between the upper and lower parts of the load, and the upper load part and the lower load part are connected to each other through the container body Explosive container. The method according to claim 1,
The container body is composed of one outer body and one inner body slidably inserted into the outer body. At the corresponding ends of the outer body and the inner body, Wherein a groove and a protrusion are respectively formed in the outer wall of the explosive vessel. delete 3. The method according to claim 1 or 2,
A hole is formed in the bottom surface of the primer groove so as to allow a wire extending from the primer to pass therethrough, and a wire having passed through the hole is inserted into the primer groove, And the extension of the explosive vessel is extended to the outside of the charge hole through the fastening groove corresponding to the priming groove. 3. The method according to claim 1 or 2,
The charge support plates may be integrally formed on the surface of the container body or may be interposed between the plug and the container body by engaging the caps or may be provided on the surface of the container body located at the upper and lower ends of the respective charge support plates, Wherein the fastening means is provided by fitting and disposing fastening means. 6. The method of claim 5,
Wherein the fixing means is a ring-shaped member having an elastic force and a frictional force together. A method of dispersing and charging charges of a explosive vessel according to any one of claims 1 to 3 in a charged hole in a charged hole formed on a rock surface to concentrate the charges in the charged hole.
KR1020150146943A 2015-10-21 2015-10-21 Explosive container and setting and blasting method thereof KR101617401B1 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101678192B1 (en) * 2016-06-02 2016-11-21 홍순비 Supporter for blasting charge dispersion, and method of setting explosives using the same and of blasting explosives therefrom
KR101836800B1 (en) * 2017-07-20 2018-03-09 호 기 성 Bulk explosives and Ammonium Nitrate Fuel Oil explosive charge Capacity adjustment device
CN110332868A (en) * 2019-08-04 2019-10-15 贵州久远爆破工程有限责任公司 A kind of Tunnel Blasting big gun spaced loading device
CN110345824A (en) * 2019-08-05 2019-10-18 贵州久远爆破工程有限责任公司 A kind of air bench blasting underground borehole blasting auxiliary device
KR102035488B1 (en) * 2018-05-15 2019-11-08 호 기 성 The blasting method of Anfo Bridge
KR102059652B1 (en) 2019-05-13 2019-12-26 주영옥 Explosive cartridge for blasting and dispersion construction method thereof
CN111811350A (en) * 2020-07-07 2020-10-23 福建荣安爆破工程有限公司 Blast hole spaced charging device for blasting engineering
CN114593650A (en) * 2022-03-18 2022-06-07 安徽中金立华矿业工程有限公司 Anti-icing blasting construction method for frozen soil layer

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4382410A (en) * 1980-12-22 1983-05-10 Bowling David S Explosive blasting method and means

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382410A (en) * 1980-12-22 1983-05-10 Bowling David S Explosive blasting method and means

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101678192B1 (en) * 2016-06-02 2016-11-21 홍순비 Supporter for blasting charge dispersion, and method of setting explosives using the same and of blasting explosives therefrom
KR101836800B1 (en) * 2017-07-20 2018-03-09 호 기 성 Bulk explosives and Ammonium Nitrate Fuel Oil explosive charge Capacity adjustment device
KR102035488B1 (en) * 2018-05-15 2019-11-08 호 기 성 The blasting method of Anfo Bridge
KR102059652B1 (en) 2019-05-13 2019-12-26 주영옥 Explosive cartridge for blasting and dispersion construction method thereof
CN110332868A (en) * 2019-08-04 2019-10-15 贵州久远爆破工程有限责任公司 A kind of Tunnel Blasting big gun spaced loading device
CN110332868B (en) * 2019-08-04 2024-05-17 贵州久远爆破工程有限责任公司 Spaced charging device for tunnel blasting gun
CN110345824A (en) * 2019-08-05 2019-10-18 贵州久远爆破工程有限责任公司 A kind of air bench blasting underground borehole blasting auxiliary device
CN110345824B (en) * 2019-08-05 2024-05-17 贵州久远爆破工程有限责任公司 Open-air step blasting air spaced charging auxiliary device
CN111811350A (en) * 2020-07-07 2020-10-23 福建荣安爆破工程有限公司 Blast hole spaced charging device for blasting engineering
CN111811350B (en) * 2020-07-07 2022-04-26 福建荣安爆破工程有限公司 Blast hole spaced charging device for blasting engineering
CN114593650A (en) * 2022-03-18 2022-06-07 安徽中金立华矿业工程有限公司 Anti-icing blasting construction method for frozen soil layer
CN114593650B (en) * 2022-03-18 2023-09-15 安徽中金立华矿业工程有限公司 Frozen soil layer anti-icing blasting construction method

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