JP5908249B2 - Non-explosive detection tool and non-explosive detection method - Google Patents

Description

  The present invention relates to a non-explosive detection tool and a non-explosive detection method for detecting a non-explosive.

  In construction and civil engineering work, there is a case where a controlled blast is carried out that uses a small amount of explosive to blast while limiting the explosive power to some extent. Since the controlled blast does not cause the blasting object to be significantly blasted and destroyed, if some explosives that do not explode rarely remain, it is very difficult to visually identify the presence of the unexplosive. For this reason, when there is a possibility of non-occurrence, dangerous work such as perforating the charged portion of the explosive was carried out, which involved a great deal of time and labor.

As a method of detecting the presence or absence of explosives inserted inside the blasting object without piercing, etc., the resistance value of the signal line that remains in an apparently healthy state after blasting is measured at each charge position. There is something. In this method, if the resistance of the signal line is infinite, it is determined that the internal detonator has exploded.
In addition, there are those that detect unexplosives by installing an electromagnetic wave reflection part, permanent magnet, detection element, etc. together with explosives inside the blasting object, and confirming the presence of electromagnetic waves, magnetism, reflected radio waves, etc. after blasting ( For example, see Patent Document 1 to Patent Document 3).

JP-A-5-312500 Japanese Utility Model Publication No. 60-39680 JP 2000-9400 A

However, since the method of measuring the resistance value of the signal line determines the explosion only by the presence or absence of the disconnection of the signal line, the presence or absence of the non-explosive agent cannot be directly confirmed. In addition, since the signal line is wired in a complicated manner, it takes time to confirm.
In addition, the method of detecting a non-explosive by electromagnetic measurement requires a member such as an electromagnetic wave reflection part to be installed in the blasting object, which is expensive. In addition, since measurement is performed using a measuring instrument after blasting, safety confirmation may take a lot of time and effort.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to use a simple tool to directly and surely confirm the presence or absence of a non-explosive, and the operation is easy and inexpensive. It is to provide an explosive detection tool and a method for detecting a non-explosive.

The first invention for achieving the above object includes a main body for disposed along the outer surface of the detonating cord is explosive material secured to the detonating cord, the ends of the detonating cord to the body a fixing unit for fixing hooked on, after performing a blasting operation by the detonating cord disposed in the hole, it is possible to perform the detection of unexploded explosive withdrawal of the body in line Ukoto It is a non-explosive detection tool.

The periphery of the body is preferably covered.
Further, it is desirable that a handle is provided at an end of the main body .
Before SL body, for example, a wire coated with plastic.

  In the non-explosive detection tool of the first invention, the main body is installed together with the explosive body in a hole formed in a concrete structure or the like, and the main body is pulled out after blasting. When the explosive body explodes, the non-explosive detector detects the main body that has been pulled out after blasting. it can. When the main body cannot be pulled out, it can be determined that the explosive body has not exploded, so the presence of the unexplosive can be easily detected. Thus, by using a non-explosive detection tool having a simple configuration, detection of non-explosive can be performed easily and at low cost.

Moreover, if the periphery of the main body is covered, it melts by combustion or the like at the time of blasting, so the presence or absence of unexplosives can be easily visually confirmed from the appearance.
Further, by providing a handle at the end of the main body, the detection tool can be easily pulled out.
Furthermore, since the fixing unit for fixing to the explosive body can ensure that the detection tool cannot be pulled out when the explosive does not occur, the presence or absence of the explosive can be reliably detected depending on whether or not the explosive can be pulled out.
Further, if the main body is made of a vinyl-coated wire, the coating melts when the explosive is blasted, the wire is exposed and the non-explosive explosive is easily detected. Also, since there are various color materials for vinyl, it is possible to make the detection tool easier to identify by appropriately selecting the color of the vinyl to be coated.

2nd invention installs the explosive body which is an explosive body in a hole, and the unexplosive detection tool by which the main body is arrange | positioned along the outer surface of the said explosive line, and the said main body was fixed to the said explosive wire A method for detecting a non-explosive agent , comprising: a step of carrying out blasting with the explosive wire , and then extracting the main body and detecting a non-explosive agent.

The periphery of the body is preferably covered.
Further, it is desirable that a handle is provided at an end of the main body.
Furthermore, it is desirable that the non-explosive detection device has a fixing unit that fixes the main body by hooking it on the end of the explosive wire .
The main body is, for example, a wire covered with vinyl.

  In the non-explosive detection method of the second invention, the non-explosive detection tool is installed together with the explosive body in a hole formed in a concrete structure or the like, and the main body is pulled out after blasting. When the explosive body explodes, the non-explosive detector detects the main body that has been pulled out after blasting, such as breaking, discoloration, and melting. . When the main body cannot be pulled out, it can be determined that the explosive body has not exploded, so the presence of the unexplosive can be easily detected. Thus, by using a non-explosive detection tool having a simple configuration, the detection of non-explosive can be performed easily and at low cost.

Moreover, if the periphery of the main body is covered, it melts by combustion or the like at the time of blasting, so the presence or absence of unexplosives can be easily visually confirmed from the appearance.
Further, by providing a handle at the end of the main body, the detection tool can be easily pulled out.
Furthermore, since the non-explosive detection tool has a fixing part for fixing the main body to the explosive body, it can be ensured that the detection tool will not be pulled out in the event of an explosive failure. Can detect presence or absence.
Further, if the main body is made of a vinyl-coated wire, the coating melts when the explosive is blasted, the wire is exposed and the non-explosive explosive is easily detected, and since it has an appropriate strength, it does not break when pulled out. Also, since there are various color materials for vinyl, it is possible to make the detection tool easier to identify by appropriately selecting the color of the vinyl to be coated.

  ADVANTAGE OF THE INVENTION According to this invention, the presence or absence of a non-explosive can be confirmed directly and reliably using a simple tool, and the non-explosive detection tool and the non-explosive detection method which are easy to work and low-cost can be provided.

The figure which shows the outline of the unexplosive detection tool 1 The figure which shows the linear explosive 13 Sectional view of the blasting target part of the concrete structure 23 Cross section in the axial direction of the hole 11 in which the linear explosive 13 is installed The figure which shows the outline | summary of the detection using the non-explosive detection tool 1

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of a non-explosive detection tool (non-explosive detection tool) 1 according to the present invention. FIG. 1A is an elevation view of the non-explosive detection tool 1. FIG.1 (b) is sectional drawing by arrow AA shown to Fig.1 (a).

  As shown in FIG. 1, the non-explosive detection tool 1 includes a main body 3, a fixing unit 7, a handle 9, and the like. The main body 3 has a linear shape. As the main body 3, a vinyl-coated wire in which vinyl is coated as a coating material 31 around the wire 29 is used. The fixing unit 7 is obtained by bending a slightly wide portion of one end portion 5 a of the main body 3. In FIG. 1, it is bent in the depth direction of the figure. The handle 9 is a ring-shaped member provided at the other end 5 b of the main body 3.

  FIG. 2 is a diagram showing the linear explosive 13. The linear explosive 13 includes an electric detonator 15, an explosive wire 17, and the like, and when loaded, the electric detonator 15, the explosive wire 17, and the non-explosive detection tool 1 are fixed with a tape 10 or the like. The non-explosive detection tool 1 has its main body 3 fixed along the explosive conductor 17 that is an explosive body, leaving an extra length on the end 5b side. The fixing portion 7 is arranged so that a bent portion thereof is hooked on the end portion 16 of the explosive wire 17 and locked at the end portion 16.

FIG. 3 shows a horizontal cross-sectional view of the blast target portion of the concrete structure 23, which is an example of a structure that performs a controlled blast with the linear explosive 13. A concrete structure 23 shown in FIG. 3 is a reinforced concrete column, and is composed of concrete 25, an axial rebar 27a, and a strip 27b.
Hereinafter, an example will be described in which a plurality of linear explosives 13 are loaded in the blast target portion of the concrete structure 23 to perform a controlled blast, and the unexplosive detection tool 1 detects the unexplosive after the blast.

  When the concrete structure 23 is controlled and blasted, as shown in FIG. 3, the portion to be blasted is pierced from the outer surface to the inside of the concrete 25 using a hammer drill or the like, and the plurality of holes 11 are appropriately spaced. To form. The hole 11 is provided so as not to interfere with the axial rebar 27a and the band 27b.

Next, the linear explosive 13 in the state shown in FIG. 2 with the non-explosive detection tool 1 attached is installed in each hole 11. The linear explosive 13 is installed at a position away from the outer surface of the concrete 25 by a predetermined distance in each hole 11. In the hole portion 11, the outer side (opening side) of the linear explosive 13 is filled with inclusions 19 such as sand, and tamping is performed on the opening side of the hole portion 11. The handle 9 of the non-explosive detection tool 1 is exposed outside the hole 11.
Then, the leg of the electric detonator 15 (see FIG. 2) of the linear explosive 13 is connected outside the hole 11 to form a series circuit in which the plurality of electric detonators 15 and the blasting device 21 are connected in series. To do. Then, cover the blast site with an explosion-proof sheet or the like, and complete the preparation for the controlled blast.

  FIG. 4 shows a sectional view in the axial direction of the hole 11 in which the linear explosive 13 is installed. 4 is an enlarged view of a range B shown in FIG. The electric detonator 15 and leg wires are not shown. As shown in FIG. 4, the explosive detection tool 1 is fixed to the end portion 16 of the lead wire 17 by the fixing portion 7 of the end portion 5a of the main body 3, and the handle 9 of the end portion 5b of the main body 3 is a hole portion. 11 is exposed. The length of the main body 3 of the non-explosive detection tool 1 is appropriately set so that it can be arranged in the state described above.

  The linear explosive 13 can be manufactured in advance at an explosives factory or the like, or can be easily created at an on-site pyrotechnic plant while confirming the blasting result at the site. The amount of explosive is set appropriately by calculating the amount of blasting energy required according to the concrete strength, cross-sectional properties such as the amount of reinforcing bars and steel frames, the drilling position, etc. by adjusting the length of the explosive wire 17.

  FIG. 5 is a diagram showing an outline of detection of a non-explosive using the non-explosive detection tool 1. FIG. 5A is a view showing the vicinity of the hole 11 after blasting, and FIG. 5B is a view showing the vicinity of the hole 11 after the unexplosive detection tool 1 is pulled out. FIG.5 (c) shows the elevation view of the non-explosive detection tool 1 after extraction, and FIG.5 (d) shows sectional drawing of the non-explosive detection tool 1 after extraction. FIG.5 (d) is sectional drawing by arrow DD shown in FIG.5 (c).

  In the concrete structure 23 shown in FIG. 3, blasting is performed after the preparation for the controlled blasting is completed. After the blasting, the main body 3 is pulled out in the direction indicated by the arrow C in FIG. 5A by holding the handle 9 of the non-explosive detection tool 1 at the place where the concrete 25 remains in an appearance healthy state.

  If the non-explosive detection tool 1 can be pulled out as shown in FIG. 5B, the state of the main body 3 of the non-explosive detection tool 1 is confirmed. In the case of the explosive detection tool 1, when the explosive wire 17 explodes, the covering material 31 of the main body 3 burns and melts at a position corresponding to the explosive wire 17 as shown in FIG. 29 is exposed. Therefore, if the exposure of the wire 29 of the main body 3 of the unexploded explosive detection tool 1 is confirmed, it can be reliably detected that the explosive wire 17 has exploded. Moreover, since the main body 3 may break at the time of blasting, it can be detected that the explosive wire 17 has exploded even when the main body 3 is broken.

  In addition, since the main body 3 of the non-explosive detection tool 1 is fixed to the explosive wire 17 by the fixing unit 7 (and the tape 10), if the non-explosive detection tool 1 cannot be pulled out after blasting, It can be determined that the explosive wire 17 remains in the state shown in FIG. 4, that is, there is a non-explosive.

  As explained above, in this embodiment, the unexplosive detection tool 1 is installed in the hole 11 formed in the concrete structure 23 together with the explosive wire 17 and the body 3 is pulled out after blasting. Then, the state of the main body 3 of the extracted non-explosive detection tool 1 and whether or not the non-explosive detection tool 1 can be extracted are confirmed.

In the non-explosive detection tool 1 using a vinyl-coated wire for the main body 3, when the explosive wire 17 explodes, the covering material 31 of the main body 3 burns and the wire 29 is exposed. Therefore, by confirming the state of the main body 3 pulled out after blasting, the presence or absence of a non-explosive explosion can be reliably detected. In addition, the presence or absence of a non-explosive can also be detected by rupture of the main body 3 or the like.
Since the main body 3 of the non-explosive detection tool 1 is attached to the explosive wire 17 by the fixing unit 7 or the like, if the main body 3 cannot be pulled out, the explosive wire 17 has not exploded and the non-explosive agent has not been expelled. It can be easily determined that it exists. By using such a simple tool, detection of non-explosives can be performed easily and at low cost.

Moreover, the restraint force by the insert 19 acts on the main body 3, and the main body 3 is pulled out against this, but the non-explosive detection tool 1 using a vinyl-coated wire for the main body 3 is suitable. Has strength and does not break when pulled.
In the present embodiment, the wire 29 is covered with vinyl. However, the present invention is not limited to this, and any coating material 31 that can be removed at the time of blasting may be used. However, since there are various color materials for vinyl, it is possible to make the detection tool easier to identify by appropriately selecting the color of the vinyl to be coated.

Further, the main body 3 of the non-explosive detection tool 1 is not limited to a wire, and other materials may be applied. However, as described above, it is desirable to have an appropriate strength even after blasting so that it does not break when it is pulled out.
It is also possible to use an uncovered wire for the main body 3. In this case, when the explosive body explodes, the main body 3 is discolored due to breakage or combustion. Therefore, by checking the state of the main body 3 pulled out after blasting, it is possible to detect the presence or absence of a non-explosive explosion. However, the case where the periphery of the main body 3 is covered as in the present embodiment makes it easier to visually recognize the presence or absence of a non-explosive agent than the appearance of the non-explosive agent detection tool 1.

  Further, in the present embodiment, the non-explosive detection tool 1 having the fixing unit 7 and the handle 9 is illustrated, but the fixing unit 7 and the handle 9 are not essential and may be omitted. However, the provision of the handle 9 facilitates the drawing operation, and the fixing unit 7 fixes the explosion line 17 so that the presence or absence of the explosive can be reliably detected depending on whether or not it can be pulled out. In the case where a fixing unit and a handle are provided, the shape is not limited to that shown in this embodiment, and can be determined as appropriate.

  Moreover, in this embodiment, although the concrete structure 23 was controlled and blasted and the example which detects a non-explosive was shown, it is not restricted to this, In the whole blasting work performed by loading an explosive body in a hole, this invention It is possible to attach the non-explosive detection tool 1 to the explosive body and use it for detection of the non-explosive.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

1 ......... Unexplosive detection tool 3 ......... Main body 5a, 5b, 16 ......... End 7 ......... Fixing part 9 ...... Hand 11 ...... Hole 13 ...... Linear explosive 15 ... …… Electric detonator 17 ……… Explosion wire 23 ……… Concrete structure 29 ……… Wire 31 ……… Coating material

Claims (9)

A body for disposed along the outer surface of the detonating cord is explosive material secured to the detonating cord,
A fixing portion for hooking and fixing the main body to the end of the explosive wire ;
After performing blasting work by the installed the detonating cord into the hole, unexploded explosive detection device capable of performing detection of unexploded explosive withdrawal of the body in line Ukoto.   The non-explosive detection tool according to claim 1, wherein the periphery of the main body is covered.   The explosive detection device according to claim 1 or 2, wherein a handle is provided at an end of the main body. The non-explosive detection device according to any one of claims 1 to 3 , wherein the main body is a wire covered with vinyl. A step of installing an explosive line that is an explosive body in the hole, and a non-explosive detection tool in which a main body is disposed along the outer surface of the explosive line and the main body is fixed to the explosive line;
After performing blasting with the explosive wire, withdrawing the main body, detecting unexplosives,
A non-explosive detection method characterized by comprising: The non-explosive detection method according to claim 5, wherein the periphery of the main body is covered. The explosive detection method according to claim 5 or 6 , wherein a handle is provided at an end of the main body. The non-explosive detection method according to any one of claims 5 to 7 , wherein the non-explosive detection tool includes a fixing unit that hooks the main body on an end of the explosive wire and fixes the main body. The non-explosive detection method according to any one of claims 5 to 8 , wherein the main body is a wire covered with vinyl.

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