KR101656200B1 - Bedrock Blasting Method Using Paraffin Inserted Paper Tube - Google Patents

Abstract

The present invention relates to a bedrock blasting method using a paraffin-inserted paper tube comprising: a boring step (S100) for boring a plurality of charge holes (2) in bedrock (1) by using a boring machine or the like; a paper tube and explosive charging step (S200) for charging the inside of the charge holes (2), bored in the boring step (S100), with at least one paper tube (10), including paraffin inserted therein, and an explosive (20); an obturation step (S300) for charging upper vacant spaces of the charge holes (2) with an obturation material; and a blasting step (S400) for exploding the explosive (20). According to the present invention, the amount of explosive needed to blast bedrock can be reduced and, at the same time, blasting efficiency is increased since the explosive force can be effectively transmitted to the bedrock.

Description

 [0001] The present invention relates to a method of blasting a rock by using a paraffin-

More particularly, the present invention relates to a method for blasting a rock in an underground or a ground in order to carry out a large-scale civil engineering work such as a port construction, a road construction, ), It is possible to reduce the amount of explosives required for blasting while blasting in the state where a paraffin-embedded branch tube is installed between the explosives installed in the steam generator, thereby reducing the noise and vibration due to blasting by increasing the blasting efficiency. The present invention relates to a method of rock blasting.

When large-scale civil works such as port construction and road construction are carried out, it is often necessary to excavate and remove rocks exposed in the ground or existing in the ground. In excavating and removing such rocks, After the rock is broken through the blasting operation, the crushed rock mass is removed by using an excavator or the like.

When performing a blasting operation to excavate a rock, generally, first a hole (charge hole) is drilled in the rock bed to be excavated by using a perforator, etc., and then the explosive is loaded into the hole, In the blasting method, the explosive is blasted in a state where it is installed intensively on the lower side of the charge ball, so that a great noise and vibration are generated. Also, (Depth) of the full color is relatively long, so that the explosive force of the explosive does not reach the rock around the green color, so that there is a high possibility of occurrence of a large size crush (all seasons), and the amount of the explosive charge There is a problem that it is necessary.

In order to solve the problem of the conventional rock blasting method as described above, a blasting method using a dispersing charge to blast the rock by charging the explosive and the green color alternately in the inside of the charge vessel and then separating and exploding the explosive with time lag However, since this method requires a primer as many as the number of charge, it is not only costly, but also it is not easy to charge alternately in explosive charge and green color in the charge hole, The explosion is not enough to reduce noise and vibration.

In order to solve the problems of the conventional blasting method as described above, a blasting method using an air tube as disclosed in Japanese Patent No. 10-0316161 has been proposed. In this method, If the air tube is installed between the explosive and the explosive, the explosive power of the explosive will be larger than the case where the explosive with the same amount is installed. Therefore, when the air tube is used, the projection area can be made longer than that of the conventional blasting method, so that the occurrence of all-round stones can be prevented, and at the same time, The same blasting effect can be achieved, which is economical, and vibration and noise due to blasting can be reduced.

However, if a hole is drilled in the ground by using a perforator or the like, water often comes out from the ground layer or rock bed in the perforated hole, and water is charged in the charge hole. In such a blasting method using the air tube, It is difficult to install the air tube in the charge space in the case where there is water in the inside of the charge hole, and it is difficult to install the air tube in the charge space after the installation, In order to solve this problem, the air tube is filled with sand or the like to prevent the air tube from rising due to the weight of the air tube. In this case, since the air tube functions as a green body, It is not much different from the blasting method using dispersion charge, A situation that does not apply to the wave field.

Meanwhile, when detonating the explosives installed in the charge ball, a plurality of explosives are usually installed in the charge ball and are sequentially blown up by using one primer (this is generally referred to as " net width "). If the air tube is installed between the explosives as described above, the explosive efficiency is improved because the long distance is long and the projected area of the explosive is increased even if the same amount of explosive is used. In this case, The distance (net width) depends on the size of the shock wave generated when the explosive explodes, the amount of heat generated by the explosion, the amount of solid debris scattered by the explosion, and so on, The air filled in the air tube acts as a heat insulating material Reducing the heat delivery amount There is a limit to hold the sunpok distance.

Therefore, it is necessary to develop a rock blasting method that can minimize the generation of vibration and noise by reducing the amount of explosives required to blast the rock by improving the blasting efficiency by increasing the projected area of the explosive by increasing the pseudo range do.

KR 10-0316161 B1 KR 10-1263902 B1 KR 20-0244815 Y1 KR 10-2015-0056706 A KR 20-0222683 Y1 KR 10-0680855 B1 US2007 / 0272108 A1

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of rock blasting that can improve blasting efficiency and reduce vibration and noise, There is a purpose.

It is an object of the present invention to provide a method of rock blasting, which comprises drilling a plurality of loading holes in a rock by using a perforator or the like; A branching and explosive loading step of loading one or more branch pipes and parcels in which paraffin is injected into each of a plurality of charge holes drilled by the drilling step; A full color step of filling a color space in an upper empty space of a plurality of charge holes; And a blasting step for exploding the explosive.

The present invention also relates to a corrugated board having a corrugated paper tube in which a paraffin-injected paper tube is formed with a through-hole at an inner central portion thereof, an outer corrugated paper tube disposed concentrically at a predetermined distance from the outside of the core material, And a paraffin-filled portion filled with paraffin in a space between the skin.

Further, the present invention provides a paraffin-embedded paper tube comprising a core material, an outer skin concentrically located on the outer side of the core material, a paraffin-filled portion filled with paraffin in a space between the core material and the outer skin, The core part is made of a carbon rod.

Further, the present invention is characterized in that the inner and outer peripheral surfaces of the paper tube constituting the core member and / or the outer skin are coated with wax, respectively.

In addition, according to the present invention, a plurality of release preventing members made of plates having elastic force on the outer peripheral surface of the outer skin are radially provided, the lower end of the release preventing member is fixed to the outer skin, So as to be spaced apart from the side surface of the side wall by a predetermined distance.

In the present invention, by installing at least one branch pipe filled with solid paraffin in the inside of the charge ball with explosives, the net width distance is increased, thereby increasing the projected area of the explosive to achieve uniform crushing of the rock bed At the same time, the blasting efficiency is improved. Also, even if a small amount of explosives is used, the blasting effect can be attained to the same degree as in the prior art, and noise and vibration can be reduced.

In the present invention, since one or more branch pipes into which paraffin is injected are installed inside the charge hole, the volume of the paraffin expands instantaneously due to the heat when the explosive explodes, and the internal pressure of the charge hole is increased to increase the blasting efficiency .

In addition, the present invention provides a paper tube having an excellent paraffin and heat transfer performance and having a specific gravity larger than that of the water in the inside of the charge hole, so that the paper tube can be easily installed inside the charge hole, Performance can improve blasting efficiency.

In addition, the present invention can form a structurally robust paper tube by coating the inner and outer major surfaces of paper tubes constituting the core part and / or the outer skin respectively with wax, thereby achieving a strong coupling with the paraffin filled in the paper tube .

Further, since the plurality of release preventing members made of plates having elastic force on the outer peripheral surface of the outer skin are radially provided, the branch tube can be easily inserted into the charge hole, and when the branch tube is seated in the charge hole, buoyancy The branch pipe does not rise in the charge space and the initial installation state is maintained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sequence flow chart showing a method of rock explosion using a paraffin-
2 (a) and 2 (b) are sectional views showing an example of a branch tube according to the present invention,
3 is a side view showing an example of a branch tube according to the present invention,
FIG. 4 is a state diagram showing an example in which rocking is performed using a paraffin-injected branch pipe according to the present invention.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings, which show preferred embodiments.

The present invention provides a rock blasting method capable of reducing the amount of explosives required for blasting a rock mass and increasing the blasting efficiency. To this end, the rock blasting method of the present invention comprises: (S100), a branching and explosive loading step (S200), a full coloring step (S300), and a blasting step (S400).

(1) Punching step (S100)

This step is a step of drilling a hole (charge hole 2) in a rock block 1 to be excavated by using a perforator or the like. In this case, the position, number, arrangement and depth of the charge hole 2 are drilled, It is done according to the standard described.

(2) Stage and explosion loading stage (S200)

This step is a step of inserting the branch tube 10 and the explosive 20 into each charge hole 2 after the plurality of charge holes 2 are drilled at the appropriate depth in the rock 1 by the drilling step S100. .

In the present invention, when the branch pipe (10) is loaded in the charge hole (2) so as to enhance the blasting efficiency, the explosive (20) stacked on the lower part of the lowermost explosive (20) 20 in order to prevent the paper tube 10 from being easily lifted by the ground water or the like introduced from the rock bed or the ground layer. 10) are used. Hereinafter, each of them will be described as one embodiment.

≪ Example 1 >

The paper tube 10 according to the first embodiment includes a core member 11 made of a paper tube having a through hole H formed at an inner center thereof as shown in Fig. 2 (a) And a paraffin-filled portion 12 filled with paraffin in a space between the core portion 11 and the outer skin 13. The paraffin-filled portion 12 is made of a paper tube and is positioned concentrically with an interval therebetween.

The core member 11 and the outer skin member 13 made of a paper tube are first prepared and the core member 11 is placed at the center of the inner portion of the outer skin 13 The paraffin-filled part 12 is formed by injecting and solidifying the liquid paraffin in a state where a space is formed between the outer skin 13 and the core part 11.

The inner and outer surfaces of the paper tube constituting the core member 11 and the outer skin 13 are each coated with wax and thus the wax is coated on the inner and outer surfaces of the core member 11 and the outer skin 13, The paraffin packed between the outer skin 13 and the core material portion 11 is easily combined with the wax to form a unified structure and a more firmly bonded form is maintained, Water is prevented from penetrating into the paper tube located inside the core material portion 11 and the outer skin material 13 so that the shape of the core material portion 11 and the outer skin 13 are maintained unchanged As a result, the distance between the original explosives is maintained by the branch tube 10.

Since the through hole H is formed in the inner central portion of the core member 11, even if groundwater or the like is present in the charge hole 2, the core tube 10 is pressed into the charge hole 2 by using a pressure- It is possible to easily install the branch pipe in the charge hole by removing the ground water or the like through the through hole H and also to prevent the branch pipe from rising due to the buoyancy even when the branch pipe installation is completed.

As described above, since the through hole is formed at the center of the inside of the core member 11, even when groundwater or the like is present in the charge hole, the branch pipe can be easily installed in the charge hole 2, When the branch pipe 10 is installed in the charge hole 2 due to the buoyancy of ground water or the like or because the installed branch pipe 10 is slowly raised due to the buoyancy of ground water or the like due to the material having a specific gravity smaller than that of water such as paper and paraffin In order to prevent this, as shown in FIG. 3, at the lower end of the outer skin 13, a plurality of detachment preventing members 13A are radially provided along the outer circumferential surface of the outer skin 13, The lower end is fixed to the outer skin 13 and the upper end is formed as a free end and is inclined to be spaced apart from the side surface of the outer skin 13 by a predetermined distance Is value.

When the branch pipe 10 is inserted into the perforated charge hole 2 by the structure of the release preventing member 13A as described above, the free end of the release preventing member 13A is easily inserted into the outer skin 13 side, The free end of the release preventing member 13A is expanded by the resilient force and is brought into contact with the inner circumferential surface of the loading hole 2 by this process, Even if buoyancy acts on the branch tube 10, the branch tube 10 is not lifted and remains in the original installed state.

In the present invention, as described above, filling of paraffin, whose price is comparatively inexpensive, in the interior of the branch pipe 10 is intended to increase the net length distance and increase the blasting efficiency. As described above, The amount of the generated shock waves, the amount of heat generated, and the amount of debris scattered by the explosion. Therefore, when the paraffin is charged in the branch pipe 10 as in the present invention, the paraffin remains in a solid state, The thermal conductivity of the explosive explosion is higher than that of the air in the gas state (when using the air tube), so that the explosive power of the explosive is transferred to the neighboring explosive at a much faster rate, and paraffin acts as scattering fragments, Explosive power of explosives increases, and as the net distance increases, blasting efficiency is improved do.

In addition, paraffin with low density is filled in the inside of the branch pipe (10) without being melted or reacted by underground water, so that the volume is instantaneously changed from the solid to the liquid by the heat when the explosive explodes and from the liquid to the gas again. It is possible to obtain sufficient violence required for blasting even with a small amount of explosion compared with the conventional blasting method, thereby increasing the blasting efficiency, and at the same time, The vibration is also reduced.

≪ Example 2 >

The branch tube 10 of the second embodiment has a core member 11 ', an outer skin member 13 located concentrically at a predetermined interval on the outer side of the core member 11' And a paraffin-filled portion 12 filled with paraffin in a space between the portion 11 'and the outer skin 13. In Embodiment 2, unlike the first embodiment, the core member 11' As shown in FIG. 2 (b), is made of a carbon rod having a specific gravity higher than that of solid water, so that the total weight of the paper tube 10 is increased, It can be easily installed in the charge hole 2 by its own weight.

As described above, when the core member 11 is composed of a carbon pipe rather than a paper tube (Example 1), it is confirmed that the blasting efficiency is much improved as a result of the actual blasting test. The performance is much higher than that of paper, so it can not only deliver the violence of the explosives to other neighboring explosives at a faster rate than paper, but also act as a strong scattering fragments of the carbon rods, so that the violence of the explosives can be transmitted to the rocks much more effectively than paper. do.

Wax is coated on the inner and outer surfaces of the outer skin 13 as in the first embodiment, and a plurality of separation preventing members 13A are radially provided on the outer peripheral surface of the lower end of the outer skin 13. [

(3) Full color step (S300)

This step is performed as follows. After the explosives 20 and the branch pipes 10 are installed in the charge space by the branching and explosive loading step S200, as shown in FIG. 4, A step of filling the void space with a full color material such as sand so that the violent force generated when the explosive 20 is blasted in the blasting step S400 to be described later is not transmitted to the upper side of the charge ball 2 While reducing vibration and noise.

(4) Blasting step (S400)

This step is a step of crushing the rock mass 1 by exploding the explosive 20 loaded in the charge hole 2 after the full color is filled in the upper space of the charge space by the full color step S300.

As described above, according to the present invention, a branch pipe filled with paraphernalia and explosives is installed in the charge hole to increase the projection distance by increasing the net width, and at the same time, it is possible to effectively transmit the violence of the explosive to the rock, Even if positive explosives are used, sufficient blasting performance is ensured. Moreover, it is economical to use a small amount of explosives, and noise and vibration during blasting can be reduced.

1: Rock 2:
10: branch tube 11, 11 ': core member
12: paraffin-packed part 13: external skin
13A: Breakaway member 20: Explosive
H: Through hole

Claims (6)

A boring step (SlOO) of drilling a plurality of loading holes (2) in the rock mass (1) by using a perforator;
A branch and an explosive loading step (S200) in which one or more branch pipes (10) into which paraffin is injected and the explosives (20) are loaded into a plurality of charge holes (2) punctured by the perforating step (S100);
A full color step (S300) of filling the upper empty space of the plurality of charge holes (2) with a full color;
And a blasting step (S400) of detonating the explosive (20)
The paper tube 10 into which the paraffin is injected has a core portion 11 formed of a paper tube having a through hole formed therein and an outer skin 13 formed of a paper tube positioned concentrically at a predetermined interval on the outer side of the core portion 11 And a paraffin filling part (12) filled with paraffin in a space between the core part (11) and the outer skin (13).
delete The method according to claim 1,
The core tube 10 into which the paraffin is injected is formed of a core part 11 'in which a through hole is not formed instead of the core part 11 in which a through hole is formed, and a corrugated part 11' And a paraffin-filled part 12 filled with paraffin in a space between the core part 11 'and the outer skin 13,
Wherein the core part (11 ') is made of a carbon bar.
The method according to claim 1,
Wherein the inner and outer peripheral surfaces of the paper tube constituting the core member (11) and the outer skin (13) are coated with wax, respectively.
The method of claim 3,
Wherein the inner and outer peripheral surfaces of the paper tube constituting the outer skin (13) are each coated with wax.
The method according to claim 1 or 3,
A plurality of release preventing members 13A made of a plate having an elastic force are radially provided on the outer peripheral surface of the lower end of the outer skin 13. The lower end of the release preventing member 13A is fixed to the outer skin 13, Wherein the upper end is formed as a free end and is inclined so as to be spaced apart from the side surface of the outer skin (13) by a predetermined distance.

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