KR20170012881A - The way for drilling blasting hole in underwater rock with two type of DTH hammer and installing explosive - Google Patents

Abstract

The present invention relates to a method of charging gunpowder by drilling underwater rocks using two types of down the hole (DTH) hammer in order to secure water depth in the sea. More specifically, the present invention proposes a method of forming a charge hole and a method of charging gunpowder which uses a first DTH hammer, and a ring bit and a casing attached thereto to drill and dig a cracked rock layer; drilling and digging the underwater rocks to form a charge hole using the second DTH hammer after retrieving the first DTH hammer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for drilling underwater rocks using two types of DTH (Down The Hole)

The present invention relates to a method for drilling and charging underwater rocks in which rocks in water are removed by blasting using explosives, and more particularly, to drilling underwater rocks using two types of DTH (Down The Hole) It is a technique on how to prevent the ball from clogging.

In order to operate the ship safely, it is necessary to secure a certain depth of water depth. If the underground ground is soil, it is removed by direct excavation using a dredger. However, if the ground is formed of rock, it is blasted and the rock is finely divided and dredged.

The drilling to blast the underwater rock is very different from the drilling in the land. There is a weathering zone between the soil layer and the rock, a lot of cracks in the rock mass, and a lot of cracks due to the blasting effect in the surrounding area.

When cracks occur in the rock, cracks often occur in the process of removing the drill after the drilling of the drill hole.

If the charge ball is blocked, the gunpowder can not be charged, and after the explosion of the nearby ball, a magma occurs due to the unloaded gunpowder. Problems arise.

In order to solve such a problem, Patent Literature 10-0284837 'Underwater Rock Blasting Method' and registered patent 10-0581174 'Underwater Rock Blasting Apparatus and Method' are disclosed.

However, the common problem of both patents is that the casing reaches the soil layer and the cracked layer in the rock can not be penetrated. Because both patents use a casing and a hammer to protect the charge ball and form a charge ball.

 It is difficult to perforate the rock layer and weathering zone, which have many cracks due to insufficient excavation force by the rotational force and indentation of the conventional casing. Therefore, the casing only penetrates through the soil layer and can not stop, and introduces the technical concept of penetrating the inside of the casing with a perforated drill to drill the rock to make a charge ball.

Here, in the registered patent 'Underwater Rock Blasting Method,' the bottom of the casing was drilled with a perforated drill, and a PVC pipe was installed to maintain the perforation hole. However, in a rock having a large crack at the lower part of the casing, there is a problem that the perforation hole collapses before the PVC pipe is inserted while the perforated drill is pierced and the perforated drill is recovered. In addition, the PVC length is short, and there is also a problem that the diver has to work underwater when charging.

In addition, the registered patent 'Underwater Rock Blasting Apparatus and Method' can penetrate the soil layer by pressurizing the casing, but it can not penetrate the weathering layer and the rock layer having many cracks, so that it is difficult to keep the perforation hole from being blocked until the powder explosion charge.

KR 10-0284837 B1 KR 10-0581174 B1

The present invention relates not only to protecting a charge ball from a tolson layer but also to protecting a charge ball from a weathering layer at the upper end of a rock bed and a crack layer in a rock bed to prevent the burial of the charge ball, , It is necessary to minimize the underwater work of the diver and to perform the underwater rock explosion economically and rapidly.

In order to solve the above-described problems, the present invention provides a drilling machine in which a perforator (10) is installed as a rock drilling tool on a working platform (20) at sea and a ring bit (1) assembled with a first DTH (Down The Hole) 3) and the casing 4 coupled to the ring bit to drill the soil 30 and the rock cracking layer 40 to reach the upper end of the rock mass 50. The first DTH hammer (S2) of separating the first DTH hammer (1) from the ring bit (3) and recovering the first DTH hammer (1), and a second DTH hammer (9) (S3) of drilling the rock bed (50) at the lower end of the ring bit (3) through the casing (4) to form a charge hole (2) 2 DTH hammer 9 using the two types of DTH hammer including the step S4 of recovering the DTH hammer 9 and the step S5 of charging the gunpowder 6 through the casing 4, The present method.

The present invention is also characterized in that a perforator (10) is installed as a rock drilling tool on a walking platform (20) in the sea, a ring bit (3) assembled and associated with a first DTH (Down The Hole) hammer (1) A step S1 of drilling the soil 30 and the rock cracking layer 40 through the casing 4 coupled to the bit to reach the upper end of the rock 50 and placing the first DTH hammer 1 in the ring (S2) of separating the first DTH hammer (1) from the bit (3) and recovering the first DTH hammer (1), installing a PVC or PE series pipe (S300) inside the casing (S400) of drilling a rock bed at the lower end of the ring bit (3) by a second DTH hammer (9) to form a charge hole (2); and after the charge hole (2) A step S600 of recovering the ring bit 3 and the casing 4 and a step S600 of charging the gunpowder 6 to the charge hole 2 through the pipe 7 step( S700), which can be used for the drilling and loading of underwater rocks using two kinds of DTH hammer.

In the present invention, the casing for protecting the charge hole can be passed through the crack layer of the rock to reach the upper end of the hard rock layer by perforating using the first DTH (Down the hole) hammer and the assembled ring bit.

The present invention can make a charge ball on a hard rock layer using a second DTH hammer.

According to the present invention, it is possible to maintain the open space of the charge space through the casing provided in the cracked layer of the rock and to charge the gunpowder at the water level.

The present invention can provide a PVC or PE pipe in the cracked layer of the rock.

In the present invention, the second DTH hammer can be used in a solid rock layer at the lower end of the pipe to form a healthy charge ball.

According to the present invention, it is possible to maintain the pore wall through the pipe provided in the cracked layer of the rock bed and to charge the gunpowder at the water level.

Figure 1 - Example of a patented 'Blasting method of underwater rock mass'.
Figure 2 - Example of a patented 'Underwater Rock Blasting Apparatus and Method'.
Figure 3 - DTH hammer structure and ring bit photo.
Fig. 4 is a view showing an example of the rock bed cracking piercing of the present invention. Fig.
Fig. 5 is a connection example of the casing assembly of the present invention; Fig.
FIG. 6A is a diagram illustrating an example of a first operation sequence of the present invention; FIG.
Figure 6b - a first working powder charge example of the present invention.
7A to 7B are diagrams illustrating an example of a second operation sequence of the present invention.
Figure 7c - Example of a second working gun charge of the present invention.

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, The same reference numerals will be assigned to the constituent elements and redundant explanations thereof will be omitted.

In addition, the term " coupled " does not mean that only a physical contact is directly made between the respective constituent elements in the contact relation between the constituent elements, but the other constituent elements are interposed between the constituent elements, Use it as a concept to cover until you are in contact.

FIGS. 3 to 4 illustrate embodiments of the present invention using a DTH (Down The Hole) hammer and a perforator 10 in the walking platform 20 at sea.

Here, the working platform 20 preferably includes a barge line and a jack-up barge line capable of carrying and operating a perforator at sea.

5, it is preferable that the casing 4 used in the present invention is coupled to the ring bit 3, and the casing 4 may be formed of one or more of the circular tube 12 and the half- To the coupling means (14).

Here, the ring bit 3 is preferably connected to the circular tube 12, and the circular tube 12 may be continuously connected to the pipe to be connected thereafter, or the ring bit 3 may be connected to the circular pipe 12 And assembling and assembling the half-moon tube (13).

It is also preferable that the engaging means 14 is formed in a clamp shape and is formed to include a flange type or a socket type or bolt means according to the circumstances of the field.

 The present invention is characterized in that the ring bit 3 assembled with the first DTH (Down The Hole) hammer 1 and the casing 4 coupled to the ring bit, as illustrated in FIG. 6A, And a step (S1) of piercing the rock crack layer (40) to reach the upper end of the rock block (50).

Here, the rock cracking layer 40 includes a layer having a high probability of foreign matter flowing into the charge hole 2 after cracking due to weathering and rocking of the rock having developed joints or around the rock, .

The down the hole (DTH) hammer is a kind of equipment for drilling a conventional ground, in which a drill bit 80 for drilling and a cylinder 90 for driving the drill bit 80 are connected directly, The hammer 50 is directly transmitted to the rock 50, so that the excavation force is much higher than that of other types of hammer.

The DTH hammer 1 is supplied with water or air from the outside through the rod 11 at a high pressure to operate the cylinder to perform impact and rotary drilling, and the high-pressure water or air used in the drilling is crushed And discharges the fragments of rock or rock along the space between the casing (4) and the rod (11).

The rock in the water generally has the gravel 30 at the upper level and the rock crack layer 40 at the upper level in the rock layer 50. The conventional drilling method causes various problems.

This is because, when the hammer is recovered after the buried rock layer 2 is formed by drilling the underwater rock layer in the past, foreign matter flows into the buried hole 2 from the soil slurry 30 or the rock crack layer 40 of the upper rock layer, The burial of the fireballs caused the problem of frequent reclamation and cleaning work.

To solve such a problem, although the patents of FIGS. 1 and 2 have been disclosed, both of the patents have installed the casing only to the soil layer and use only one kind of hammer, so that the excavation force is limited. There arises a problem that the fragments can not be prevented from entering the charge hole 2.

3, the first DTH hammer 1 and the ring bit 3 are coupled together and the ring bit 3 is coupled to the casing 4 in order to solve this problem. .

The ring bit (3) associated with the first DTH hammer (1) is characterized in that the hammer operates simultaneously with the batting rotation. Thus, the rock crack layer 40 at the upper end of the rock block 50 can be passed together using the crushing force of the first DTH hammer.

The casing 4 coupled with the ring bit 3 serves to prevent foreign matter from flowing into the gravel 30 and the rock cracking layer 40 at the periphery of the first DTH hammer 1 when the first DTH hammer 1 is pivoted.

Here, the ring bit 3 and the casing 4 are coupled by a connecting device (no number) including a bearing, and the ring bit 3 is pushed in a non-rotating manner separately from the rotating operation .

4 is a view showing a state in which a rocking bit 3 joined with a first DTH hammer 1 in a walking platform 20 carrying a perforator 10 at sea, Layer 40 and reach the top of the rock 50. FIG.

In view of the excavation force considering the structure and the thickness of the ring bit 3, it is possible to pierce the rock crack layer 40 up to the rock crack layer 40. Thus, the experiencing person judges the speed of the drilling punching in the working platform 20, It is preferable to stop the drilling operation using the first DTH hammer 1 in order to prevent the ring bit 3 from being damaged.

The next working step of the present invention includes the step S2 of separating the first DTH hammer 1 from the ring bit 3 and recovering the first DTH hammer 1 as illustrated in Figure 6a .

Here, it is preferable that the first DTH hammer 1 includes a characteristic that it is separated from the ring bit 3 by rotating in the direction opposite to the excavation rotation direction.

The next working step of the present invention is to use a second DTH hammer 9 smaller than the inner diameter of the ring bit 3 to displace the rock 50 at the lower end of the ring bit 3, (S3) of drilling and drilling to form the charge hole (2).

It is preferable that the second DTH hammer 9 is rotated while the casing 4 is installed on the rock cracking layer 40 so that the rock 50 is pierced and drilled to form a charge hole.

The next working step of the present invention is formed by including the step S4 of recovering the second DTH hammer 9 after forming the charge hole 2, as illustrated in FIG. 6A.

Here, even if the second DTH hammer 9 is recovered, it is preferable that foreign matter is prevented from flowing in the rock cracking layer 40 by the casing 4 to the loading vessel.

The next working step of the present invention is formed including the step S5 of loading the gunpowder 6 through the casing 4, as illustrated in Fig. 6A.

Here, as illustrated in FIG. 6B, when the casing is extended to the upper part of the water, it is desirable to perform charge operation of the gunpowder on the water surface. However, even if the casing 4 is in the water due to the change of the tide due to marine conditions, the depth of the water is not so deep, so that the diver can easily confirm the casing 4 and the charging operation speed of the gunpowder 6 is improved.

After the charging step (S5) of the gunpowder (6) through the casing (4), collecting the casing, the gunpowder (5) connected to the gunpowder (6) And blasting is carried out.

Here, the explosion wire 5 connected to the gunpowder 6 is of electric or non-electric type.

In the present invention, as shown in Figs. 7A to 7C, a method of working according to a further invention is disclosed according to a method of protecting the charge ball 2 from the rock crack layer 40. [

The working method of the present invention shown in Fig. 7A is characterized in that the ring bit 3 assembled with the first DTH (Down The Hole) hammer 1 and the casing 4 coupled to the ring bit are used to form the soil 30 And a step (S1) of piercing the rock layer (40) to reach the upper end of the rock mass (50)

Thereafter, a step S2 of separating the first DTH hammer 1 from the ring bit 3 and recovering the first DTH hammer 1,

Thereafter, a step (S300) of installing a pipe 7 of PVC or PE series in the casing is performed;

Thereafter, the step of drilling the rock at the lower end of the ring bit 3 into the second DTH hammer 9 through the pipe to form the charge hole 2 (S400).

Here, a description will be given of the difference from the working method described at the beginning, and a pipe 7 of PVC or PE series is additionally used to protect the charge hole 2 from the rock crack layer 40.

This is because, in general, for the underwater blasting work, a charging hole 2 is formed in the rock by the preceding process, and the gunpowder 6 is tightened at the same time when the charging hole 2 is formed. At this time, it is economical to protect the charge ball 2 by using a PVC or PE-based pipe 7 whose price is low if the number of the charge ball 2 is large.

When the interval between the casing 4 and the rod 11 of the second DTH hammer is wide, the speed at which the cancer fragments shattered by the second DTH hammer 9 are discharged is reduced, The formation rate may be lowered.

Therefore, in order to smooth the discharge of cancer fragments crushed by the second DTH hammer 9, the pipe 7 is used to narrow the distance between the rod 11 of the second DTH hammer and the pipe 7 uniformly It is preferable.

FIG. 7B illustrates a subsequent operation according to the present invention.

The present invention includes a step S500 of recovering the second DTH hammer 9 after the charge hole 2 is formed, a step S600 of recovering the ring bit 3 and the casing 4, (S700) of charging the explosive 6 with the charge hole 2 through the opening 6a.

Here, when the charge hole 2 is formed by the second DTH hammer 9, it is preferable that the casing 4 be recovered.

This is because the pipe 7 can prevent foreign matter from entering the charge hole 2 from the rock crack layer 40. Therefore, it is preferable that the recovered casing 4 is useful for forming the other charge hole 2, thereby improving the economical efficiency.

Fig. 7C shows the operation of charging the gunpowder 6 through the pipe 7. Fig.

It is preferable that the gunpowder 6 is installed in the charge hole through the pipe 7 and the pipe 7 is recovered and the explosion wire 5 is connected to the walking platform 20 to perform blasting.

 The decay line (5) is characterized by being formed electrically or non-electrically.

1: 1st DTH hammer 2: charge ball 3: ring bit
4: casing 5: detonator
6: Gunpowder 7: Pipe
9: second DTH hammer 10: perforator
11: rod 12: circular tube
13: Banwool tube 14: Coupling device
20: Working Platform
30: earth 40: rock layer 50: rock mass

Claims (6)

A perforator (10) is installed on the working platform (20) in the sea as a rock drilling rig,
The soil 30 and the rock cracking layer 40 are drilled and punched using the ring bit 3 assembled with the first DTH down the hole hammer 1 and the casing 4 coupled to the ring bit (S1) reaching the top of the rock mass (50);
Separating the first DTH hammer (1) from the ring bit (3) and recovering the first DTH hammer (1) (S2);
The second DTH hammer 9 which is smaller than the inner diameter of the ring bit 3 is used to pierce the rock bed 50 at the lower end of the ring bit 3 through the casing 4, (S3);
(S4) recovering the second DTH hammer 9 after forming the charge hole 2;
(S5) charging the gunpowder (6) through the casing (4). The method of drilling and charging underwater rocks using two types of DTH hammer. The method according to claim 1, wherein, in step (S1)
Characterized in that a plurality of the casings (4) coupled to the ring bit (3) are assembled and connected by at least one of the circular tube (12) or the semi-circular tube (13) Underwater rock drilling and loading method using DTH hammer. The method according to claim 1,
After the charging step (S5) of the gunpowder (6) through the casing (4), collecting the gunpowder (5) connected to the gunpowder (6) Underwater rock drilling and loading method using two kinds of DTH hammer. A perforator (10) is installed on the working platform (20) in the sea as a rock drilling rig,
The soil 30 and the rock cracking layer 40 are drilled and punched using the ring bit 3 assembled with the first DTH down the hole hammer 1 and the casing 4 coupled to the ring bit (S1) reaching the top of the rock mass (50);
Separating the first DTH hammer (1) from the ring bit (3) and recovering the first DTH hammer (1) (S2);
Installing a pipe (7) of PVC or PE series in the casing (S300);
(S400) of drilling the rock at the lower end of the ring bit (3) by the second DTH hammer (9) through the pipe to form the charge hole (2);
Collecting the second DTH hammer 9 after the charge hole 2 is formed (S500);
Recovering the ring bit (3) and the casing (4) (S600);
(S700) charging the explosive (6) to the charge hole (2) through the pipe (7). The method of drilling and charging underwater rocks using two types of DTH hammer. In the step (S1) of claim 4,
Characterized in that a plurality of the casings (4) coupled to the ring bit (3) are assembled and connected by at least one of the circular tube (12) or the semi-circular tube (13) Underwater rock drilling and loading method using DTH hammer .. 5. The method of claim 4,
And recovering the pipe (7) after the step (S5) of loading the gunpowder (6) through the pipe (7), wherein the explosion wire (5) connected to the gunpowder (6) And a method of drilling and charging underwater rocks using two kinds of DTH hammer.

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