KR200328396Y1 - Excavating structure for preventing transmission of blast vibration using line drilling holes - Google Patents

Abstract

The excavation structure for blasting vibration blocking to prevent the blasting vibration from being transmitted to the outside drills two or more lines of drill holes in the periphery of the area for blasting among the rocks to be excavated, and each of the line drillers in each row In order to prevent the transfer to the staggered to be arranged with respect to the blasting area. The line drilling holes in each row are filled with a vibration absorber for absorbing blast vibration.

Description

EXCAVATING STRUCTURE FOR PREVENTING TRANSMISSION OF BLAST VIBRATION USING LINE DRILLING HOLES}

The present invention relates to an excavation structure for blocking blasting vibration, and more particularly, to drill two or more lines of drill holes alternately around the blasting area and inserting a vibration absorber therein to prevent the blasting vibration from being transmitted to the outside. It relates to an excavation structure for blocking blast vibration.

In general, construction and civil works frequently carry out blasting work to crush rock. The blasting work using explosives has the advantage of easily removing rocks or other obstacles using the explosive power of the explosives, but has the disadvantage that vibrations and noise generated during blasting affect the surrounding buildings or structures.

In the blasting process, the shock wave propagated from the width source is remarkably attenuated according to the distance, but a part of the energy generated at this time is transformed into the form of a seismic wave and propagates into the rock to generate vibration of the ground. The ground vibration generated at this time is called blast vibration. These blasting vibrations have shorter durations, easier attenuation, and relatively simpler waveforms than vibrations caused by earthquakes. Therefore, in the workplace where the open area is formed, problems caused by the blasting vibration hardly occur, but when there are structures such as buildings and subways in the vicinity, the blasting vibration can cause serious problems.

Various efforts have been made to suppress blasting vibration. As an example, Korean Patent Registration No. 337211 has introduced 'vibration control blasting method using air curtain'. This blasting method uses a method of blasting explosives after forming a constant air pressure in the charge hole loaded with explosives using an air compressor. However, in the above blasting method, there are too many accessory equipment for forming the air pressure, and the actual vibration control is difficult because the blasting vibration is substantially free of the vibration damping effect in the area consisting of air alone.

In addition, Korean Patent Publication No. 2001-99477 discloses a method for installing a precracking dustproof filter zone for blocking blast vibration. The method of installing a dustproof filter zone of this document is configured to form a line of dustproof holes around the blasting area, and to form a precracked dustproof filter zone connecting the respective dustproof holes by inserting a small amount of explosive into the dustproof hole. However, this method is not realistic because the blasting vibration generated during the formation of the anti-vibration filter zone performed before the rock crushing process is transmitted to the outside as it is. The blasting vibration is very large and there is a problem that the linear cracks connecting the vibration chambers cannot reliably reduce the blasting vibration, but also quickly fill it with rocks, soil, and water.

The present invention was devised to solve the above problems, and by blasting two or more lines of drilling lines around the blasting area alternately and inserting a vibration absorber therein, the blasting vibration can be prevented from being transmitted to the outside An object of the present invention is to provide an excavation structure for vibration blocking.

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the present invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a schematic view showing an excavation structure according to the present invention.

2 is a view separately showing a part of the line drilling hole in the excavation structure of FIG.

3 is a view showing a case where two rows of line drilling holes are formed without a gap between each row of line drilling holes in the excavation structure of the present invention.

4 is a view showing a case where two rows of line drilling holes are formed with a predetermined gap between each row of line drilling holes in the excavation structure of the present invention.

5 is a view showing a form in which the vibration absorber is inserted into the line drilling hole of FIG.

6A to 6E show various examples of vibration absorbing materials inserted into line drilling holes.

7 is a schematic diagram showing an excavation structure in which three rows of line drilling holes are drilled according to another embodiment of the present invention.

8 is a view separately showing a part of the line drilling hole in the excavation structure of FIG.

9 is a view for explaining the arrangement of the three-row line drilling hole of FIG.

<Explanation of symbols for the main parts of the drawings>

10. Excavation boundary line 12. Blasting area 20, 30. Line drilling machine

22,32 .. Line 1 Drilling Line 22a, 22b, 22c, 22d, 22e .. Vibration Absorber

24,34 .. Row 2 Drill Line 36 .. Row 3 Drill Line

In order to achieve the above object, the excavation structure for blasting vibration blocking according to the present invention drills two or more lines of drilling holes in the periphery of the area for blasting among the rocks to be excavated, and each of the lines of the drilling holes In order to prevent vibration from being transmitted to the outside, they are arranged to be staggered with respect to the blasting area.

Preferably, the line drilling hole of each row is filled with a vibration absorber for absorbing blasting vibration, wherein the vibration absorber is completely filled in the line drilling hole, or the shape of any one of a cylindrical tube, a square pillar, a cross pillar It is also possible to insert the vibration absorbing material having a line drilling hole.

In addition, the vibration absorbing material is preferably made of any one of styropole, sponge, plastic, silver foil pipe.

On the other hand, it is preferable that the line drilling holes are formed in two rows, and no gap exists between the line drilling holes in the first row and the line drilling holes in the second row, based on the blasting area.

However, on the other hand, the line drilling holes are formed in two rows, and there may be a predetermined gap between the line drilling holes in the first row and the line drilling holes in the second row when the blasting area is referred to. A third row of line drilling holes may be further formed between the line drilling holes in the row and the line drilling holes in the second row at the position of the gap.

Preferably, the third row of line drilling holes have a smaller diameter than the first and second row of line drilling holes.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors will properly describe the concept of terms in order to best explain their own design. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a view showing an excavation structure for blocking blast vibration according to the present invention. Referring to Figure 1 excavation structure of the present invention as follows.

First, in order to use the excavation method of the present invention, the excavation boundary surface 10 in a predetermined area should be set in consideration of the surrounding conditions. Excavation boundary surface 10 is not specifically determined, it is determined by the conditions of the construction site and the shape of the structure to be constructed.

Rock and other obstacles are present in the digging boundary surface 10, in the present invention performs a blasting method using explosives to remove the rock and obstacles. In this case, the blasting process is not performed in all areas within the digging boundary surface 10, but is performed in an internal predetermined space spaced apart from the digging boundary surface 10 by a predetermined distance in consideration of the effect of the blasting vibration generated in the blasting process. At this time, in the present invention, the area where the blasting process is substantially performed is referred to as the blasting area 12.

Thus, when the blasting region 12 is set in the digging boundary surface 10, in the present invention, two or more rows of line drilling holes are formed to surround the blasting region 12 at a position adjacent to the digging boundary surface 10. ). At this time, the outer row of the two or more lines of the drilling hole 20 is formed almost adjacent to the digging boundary surface 10, the other rows are formed in the digging boundary surface 10 at a position separated by a predetermined interval from the outer column. In addition, the line drilling hole 20 is arranged so that the drilling holes in each row form a line, each of these line drilling holes serves to attenuate the blast vibration generated in the blasting region 12 or to prevent the transmission of the blast vibration. In this regard, it is also referred to as the term 'vacuum vacuum'. In this embodiment, as an example, the line drilling holes 20 are shown arranged in two rows.

In the present invention, the line drilling holes 20 in each row are arranged to be alternately arranged with respect to the blasting region 12. Referring to FIG. 2, which shows the arrangement of the line drilling holes 20 in more detail, first, when the line drilling holes 22 in the first row are arranged in a line at regular intervals, the line drilling holes 24 in the second row are formed. It is arranged in a row in parallel with each other at a position spaced apart from the first row line drilling hole 22 by a predetermined distance, each of the second row line drilling hole 24 when viewed in a direction perpendicular to each row is a first row line drilling hole ( 22) Located at each intermediate point. Thus, two adjacent first row line drilling holes 22 and one second row line drilling holes 24 are substantially triangular with each other, and vice versa.

As such, when the first row line drilling hole 22 and the second row line drilling hole 24 are alternately arranged with each other, the blasting vibration propagated in the blasting region 12 is firstly adjacent to the blasting region 12. The blasting vibrations attenuated by the row line drilling holes 22 and exited between the first row line drilling holes 22 are applied to the adjacent first row line drilling holes 22 behind the first row line drilling holes 22. It is attenuated by a second row line drilling hole 24 located at an intermediate point. That is, in the present embodiment, the blasting vibration transmitted from the blasting region 12 can be effectively attenuated over two levels.

In the present invention, the line drilling hole 20 is drilled by a general drilling method. At this time, the diameter of the line drilling hole 20 increases the drilling cost while the diameter of the blasting vibration increases, while the diameter decreases the drilling cost of the blasting vibration, while the diameter of the line drilling hole 20 decreases. In addition, the line drilling holes 20 in each row have a smaller number of punctures, but the number of punctures is reduced, but the blasting vibration is attenuated. Therefore, it is preferable that the line drilling hole 20 has an appropriate size and a suitable spacing. For example, the diameter of the line drilling hole 20 can be set to 102 mm, and the spacing between the line drilling holes in each row can be set to 300 mm. have. Further, the spacing between the rows of the line drilling holes 20 is suitably about 250 mm under the above-described conditions.

In addition, the line drilling hole 20 in the present invention may be set to the same size, or different from each other, the size of the line drilling hole 22, 24 corresponding to each column.

Meanwhile, in the present embodiment, the line drilling holes 20 will be described in detail. The line drilling holes 22 and 24 of each row may be formed of the line drilling holes 22 and the first row when viewed from the blasting area 12. It is preferable that there is no gap between the two rows of line drilling holes 24. This state is well illustrated in FIG. 3, where the first row of line drilling holes 22 has a diameter of d ₁ and the second row of line drilling holes 24 has a diameter of d ₂ . Here, when the straight line toward the blasting region 12 is drawn, the line drilling holes 22 and 24 in each row are formed when the line drilling holes 22 in the first row and the line drilling holes 24 in the second row are tangent to the same line. There is no gap between). Thus, if there is no gap between the line drilling hole 22 in the first row and the line drilling hole 24 in the second row, the blasting vibration generated in the blasting region 12 is almost without exception in the first row or the second row of lines. It comes into contact with the drilling holes 22 and 24, whereby a large part of the blasting vibration can be attenuated. In addition, although the line drilling hole 22 of the first row and the line drilling hole 24 of the second row may be formed to overlap each other, this is not preferable because it causes an increase in construction cost.

In order to ideally arrange the line drilling holes 22 and 24 as shown in FIG. 3, the diameter of the line drilling holes 22 and 24 should be large or the distance between the line drilling holes 22 and 24 should be narrow. However, since this means an increase in the overall construction cost, in consideration of economics, the first and second line drilling holes 22 and 24 are slightly different from each other based on the blasting area 12. It may be arranged to be spaced apart. This is illustrated well in FIG. At this time, a gap g is formed between the drilling holes in each row. This gap g, however, cannot be prevented from leaking to the outside when it is too large, and is preferably larger than the diameters d ₁ and d _{2 of} the line drilling holes 22 and 24 in the first and second rows. Small is good

In the present invention, each line drilling hole 20 is shown to remain in a perforated state. However, in general, since the blasting vibration can be propagated in a certain amount even in the air, a separate vibration absorber may be additionally used to reduce the blasting vibration more effectively. In particular, when groundwater is present in the rock, the groundwater may be filled and penetrated into the line drilling hole 20. In this case, the damping effect of the blasting vibration is further reduced, and thus the vibration absorber is useful as a countermeasure.

Fig. 5 shows a form in which the above-described vibration absorbing materials 22a and 24a are inserted into the line drilling holes 22 and 24 in each row. The vibration absorbers 22a and 24a are made of a material capable of absorbing vibration, and preferably, styropole, sponge, plastic, silver foil pipe, or the like is used.

In addition, although the vibration absorbing materials 22a and 24a are illustrated as having a cylindrical tubular shape in FIG. 5, the shapes of the vibration absorbing materials 22a and 24a are not limited thereto and may be variously modified. For example, FIG. 6A shows that the vibration absorber 22b is completely filled in the line drilling hole 22. In this case, a porous material is preferable as the vibration absorbing material 22b, and styropol and sponge are particularly suitable in the above examples.

In addition, the vibration absorber 22c having a square pillar shape as shown in FIG. 6B, the vibration absorber 22d having a triangular prism shape as shown in FIG. 6C, the vibration absorber 22e having a cross shape as shown in FIG. 6D, and as shown in FIG. 6E. The same cylindrical vibration absorbing material (22f) is also very suitable, in addition to that there may be various variations.

7 illustrates an excavation structure for blasting vibration blocking according to another embodiment of the present invention. This embodiment is almost similar to the previous embodiment shown in FIG. 1 except that the line drilling holes are arranged in three rows unlike the previous embodiment.

Referring to FIG. 8 which shows the line drilling hole 30 of this embodiment in detail, in this embodiment, the line drilling hole 32 and the line drilling hole 34 of the 2nd row which are substantially the same as the previous embodiment are also shown. And a gap g shown in FIG. 4 is formed between the line drilling hole 32 in the first row and the line drilling hole 34 in the second row. In addition, in the present embodiment, in addition to the line drilling holes 32 and 34 in the first row and the second row, line drilling holes 36 in the third row are additionally arranged.

The third row of line drilling holes 36 are located between the line drilling holes 32 in the first row and the line drilling holes 34 in the second row. More specifically, the third row of line drilling holes 36 are generally arranged to form a line between the first row and the second row, and each of the third row of line drilling holes 36 also includes the first row of line drilling holes ( 32) and the gap g formed between the line drilling holes 34 in the second row.

The third row of line drilling holes 36 preferably have a diameter d equal to the gap g formed between the first row of line drilling holes 32 and the second row of line drilling holes 34 as shown in FIG. ₃ ) That is, since the gap g is substantially smaller than the diameters d ₁ and d _{2 of} the line drilling holes 32 and 34 in the first row and the second row, the diameter of the line drilling hole 36 in the third row is consequently. (d ₃ ) is preferably smaller than the diameters d ₁ and d _{2 of} the line drilling holes 32 and 34 in the first and second rows.

The third row of line drilling holes 36 blocks and absorbs blast vibrations that can pass between the first and second row of line drilling holes 32 and 34, thereby further reducing the blast vibration damping effect. You lose.

In addition, in the present embodiment, the above-described vibration absorbing material may be inserted into the line drilling holes 32, 34, and 36.

Next, the method of digging the rock will be described in sequence using the above-described structure.

First, the contractor sets the range to be excavated in consideration of the construction and surrounding conditions, that is, the excavation boundary line (10).

Thereafter, the contractor sets the area in which the blasting work is to be substantially performed, that is, the blasting area 12 in order to remove the rock and the obstacle in the excavation boundary line 10.

Subsequently, the contractor forms two or more lines of drilling holes 20 and 30 according to the above-described excavation structure of the present invention around the blasting area 12 at a position adjacent to the excavation boundary line 10. At this time, the outermost surface of the line drilling hole (20, 30) is preferably the outer peripheral surface substantially in contact with the digging boundary line (10). In addition, the line drilling holes 20 and 30 allow each of the line drilling holes in each row to be staggered with respect to the blasting area.

When the drilling of the line drilling hole 20, 30 is all finished, the contractor performs a blasting work for the blasting area (12). At this time, the blasting method is preferably to perform a microscopic blasting, the blasting vibration generated during the blasting operation is mostly blocked or absorbed by the line drilling hole (20, 30) and the vibration absorber inserted therein to almost outside It doesn't spread.

After the blasting process is completed, the contractor cleans up the crushed rock debris in the blasting region 12. At this time, the explosive force generated in the blasting region 12 is transmitted to the line drilling holes 20 and 30, but is hardly transmitted to the outside of the line drilling holes 20 and 30, so the range of the explosive force is substantially the line drilling hole 20 , 30). In addition, since the outermost rows of the line drilling holes 20 and 30 are substantially in contact with the excavation boundary line 10, the area fractured by the blasting process is also the outermost column of the line drilling holes 20 and 30, that is, the excavation boundary line. (10). Therefore, when the blasting process is carried out using the excavation structure of the present invention, it is possible to finish all the excavating processes only by cleaning the rock debris after the blasting process.

Such excavation structure of the present invention is designed to substantially block the blast vibration, but the scope of the present invention is not necessarily limited thereto. For example, the excavation structure of the present invention can also be used in a T4 drilling operation or a drilling operation using an auger drilling drill. In this case, the vibration generated in the drilling process is formed by forming a line drilling hole of the present invention around the drilling area. It can be prevented from spreading.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and variations can be made within the equivalent scope of the utility model registration claims to be described.

Such an excavation structure for blasting vibration blocking according to the present invention can effectively block and absorb blasting vibration generated in the blasting process by arranging two or more lines of drilling holes around the blasting area. In addition, when the vibration absorbing material is inserted into the line drilling hole, the vibration damping effect can be further improved.

Claims (9)

In the structure of excavating rock using blasting, Two or more lines of drill holes are drilled around the area for blasting among the rocks to be drilled, and the lines of drill holes in each row are alternately arranged with respect to the blasting area to prevent blasting vibrations from being transmitted to the outside. Excavation structure for blasting vibration blocking by using a line drilling hole. The method of claim 1, Excavation structure for blasting vibration blocking using a line drilling hole, characterized in that the vibration absorbing material for absorbing the blasting vibration is filled in the line drilling hole of each row. The method of claim 2, The vibration absorbing material is an excavation structure for blocking the blast vibration by using a line drilling hole, characterized in that completely filled in the line drilling hole. The method of claim 2, The vibration absorbing material is an excavation structure for blocking blast vibration using a line drilling hole, characterized in that having a shape of any one of a cylindrical tube, a square pillar, a cross pillar. The method of claim 2, The vibration absorbing material is an excavation structure for blasting vibration blocking using a line drilling hole, characterized in that it is made of any one of styropole, sponge, plastic, silver foil pipe. The method of claim 1, The line drilling hole is formed in two rows, and the blasting vibration blocking using the line drilling hole is characterized in that there is no gap between the line drilling hole in the first row and the line drilling hole in the second row, based on the blasting area. Excavation structure. The method of claim 1, The line drilling holes are formed in two rows, and when the blasting area is referred to, the blasting vibration is blocked using a line drilling hole, characterized in that a predetermined gap exists between the line drilling holes in the first row and the line drilling holes in the second row. Structure for construction. The method of claim 7, wherein An excavation structure for blasting vibration blocking using a line drilling hole, characterized in that the line drilling hole of the third row is further formed between the line drilling hole of the first row and the line drilling hole of the second row at the position of the gap. The method of claim 8, The line drilling hole of the third row has a diameter smaller than that of the line drilling hole of the first and second rows excavation structure for blast vibration blocking using a line drilling hole.