JP2022036769A - Accommodation pipe of ignition signal transmission medium and blast preparation method using the same - Google Patents

Abstract

To provide an accommodation pipe of an ignition signal transmission medium which can sufficiently secure the safety of a worker at line connection work while suppressing an increase of a blast cost, and a blast preparation method using the same.SOLUTION: An accommodation pipe 1 of an ignition signal transmission medium comprises a semi-cylindrical pipe-shaped main body 5, and the vicinity of its tip can be inserted into a blast hole 4 which is formed at a pit face 3. The pipe-shaped main body 5 is constituted so as to be capable of accommodating a leg line 2 as the ignition signal transmission medium connected to a detonator (not illustrated) embedded into a primer 7 which is charged at a hole bottom of the blast hole 4 in a form for placing it on its internal peripheral face 8. A removal opening 6 extending over an entire length along a material axial direction is formed, and the leg line 2 can be removed via the removal opening.SELECTED DRAWING: Figure 1

Description

The present invention mainly relates to an accommodating pipe of an ignition signal transmission medium applied when arranging a leg wire or a fire guide tube drawn from a blasting hole when blasting a tunnel, and a blasting preparation method using the same.

When blasting a tunnel, a blasting hole is first drilled in the face, and then the blasting holes are sequentially loaded with inclusions called parent dies, additional dies and anchors, and in the case of electric ignition, they are embedded in the parent dies. A so-called connection in which the leg wire extending from the detonator is connected to the blasting bus or auxiliary bus, and in the case of blasting the detonator, the detonator (tube) extending from the detonator with the detonator is connected to the detonating cord. Work is done, and after that, the parent die is detonated and the bedrock is crushed.

After the blasting is completed, remove floating stones and loose parts from the new face as appropriate to prepare for the next blasting.

Here, when drilling a new blasting hole, the face may loosen due to its vibration, etc., and skin may fall off. However, such a situation may cause unexpected damage to workers preparing for blasting. Therefore, remote control for blasting preparation work away from the face and mechanization for proceeding with work without the hands of workers have been developed (Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2006-266670 Japanese Unexamined Patent Publication No. 2006-308177

However, if the bedrock is soft or there are many joints in the bedrock, the inner peripheral surface of the blasting hole may become rough and it may not be possible to insert the loading pipe of the loading machine all the way. It becomes difficult to attach a parent die and place the parent die near the bottom of the blasting hole, or to pump various loads such as expansion die, anchor, and granular explosive through a loading pipe.

In such a case, there is no choice but to perform the loading work manually using a stick, but in that case, it is difficult to protect the worker from the danger of skin falling because the work is forced to work in a situation close to the face. There was a problem of becoming.

In addition, even if the loading work can be performed remotely, in the wiring work, the leg wire and the detonating cord from the detonator hanging from the blasting hole along the exposed surface of the face (hereinafter referred to as the face surface) Since it is necessary to connect the detonator from the detonator with a tube to the blasting bus, auxiliary bus or detonating cord, it is forced to work in a situation close to the face, and in any case, the worker's risk of skin loss There was a problem that it was difficult to ensure sufficient safety.

In the past, measures were taken to spray concrete on the face surface, but it was difficult to sufficiently prevent skin loss with such measures, and there was an urgent need to develop further measures to prevent skin loss.

The present invention has been made in consideration of the above-mentioned circumstances, and is a housing pipe for an ignition signal transmission medium capable of sufficiently ensuring the safety of workers in wiring work while suppressing an increase in blasting cost, and a pipe thereof. The purpose is to provide a method for preparing for blasting using.

In order to achieve the above object, the accommodating pipe of the ignition signal transmission medium according to the present invention can accommodate the ignition signal transmission medium such as a leg line and a flame guide tube along the material axis direction as described in claim 1. The pipe-shaped main body is provided with a pipe-shaped main body that is configured to be inserted from the tip into a rupture hole formed in the face, and a removal opening extending along the material axis direction and over the entire length is provided in the pipe-shaped main body. As a result, the ignition signal transmission medium can be removed from the pipe-shaped main body through the removal opening.

Further, the accommodating pipe of the ignition signal transmission medium according to the present invention is a boundary position between the portion of the pipe-shaped main body to be inserted into the blasting hole and the portion to be exposed from the face, and the outer peripheral surface thereof. A locking portion to be locked to the face opening of the blasting hole is provided so as to project.

Further, the accommodating pipe of the ignition signal transmission medium according to the present invention is a boundary position between the portion of the pipe-shaped main body to be inserted into the blasting hole and the portion to be exposed from the face, and the outer peripheral surface thereof. Is provided with markings that can identify the boundary.

Further, in the accommodating pipe of the ignition signal transmission medium according to the present invention, the pipe-shaped main body is formed so as to have a C-shaped cross section, and the opening along the material axis direction is used as the removal opening. be.

Further, in the accommodating pipe of the ignition signal transmission medium according to the present invention, the pipe-shaped main body is formed of an elastic material so that the pipe-shaped main body can be contracted and expanded in the radial direction by changing the opening width of the removal opening. By forming the outer diameter so as to be larger than the inner diameter of the blasting hole, the outer peripheral surface of the pipe-shaped main body is brought into contact with the inner peripheral surface of the blasting hole in the state of being inserted into the blasting hole. It is configured in.

Further, the accommodating pipe of the ignition signal transmission medium according to the present invention has a semi-cylindrical shape at the base end side of the pipe-shaped main body to form an accommodating opening, and the accommodating opening is a part of the removing opening. It was.

Further, as described in claim 7, the method for preparing for rupture according to the present invention includes the pipe-shaped main body constituting the accommodating pipe of the ignition signal transmission medium according to any one of claims 1 to 6 at its base end. Insert into the rupture hole so that the side is positioned away from the face.
Before and after the insertion step, the parent die having a detonator to which the ignition signal transmission medium is connected is embedded in the blasting hole so that the ignition signal transmission medium is housed in the pipe-shaped main body. Load near the buttock and
At the same time as or after the loading step of the parent die, additional loadings such as additional dies and anchors are loaded into the blasting holes following the parent die.
The ignition signal transmission medium is connected and
After the connection is completed, the pipe-shaped main body is pulled out from the blasting hole, and the ignition signal transmission medium is removed from the pipe-shaped main body through the removal opening, whereby the accommodating pipe of the ignition signal transmission medium is removed from the face. It is to be removed from.

Further, in the blasting preparation method according to the present invention, after the parent die is housed in the pipe-shaped body, the pipe-shaped body is maintained while the ignition signal transmission medium is housed in the pipe-shaped body. By pushing the parent die into the blasting hole by sliding on the sliding surface with the inner peripheral surface of the main body as a sliding surface, the parent die is loaded in the vicinity of the hole end of the blasting hole.
The additional load is housed individually or collectively in the pipe-shaped body, and then the additional load is slid on the sliding surface with the inner peripheral surface of the pipe-shaped body as a sliding surface. The additional load is loaded into the blasting holes by pushing them individually or collectively into the blasting holes.

Further, in the blasting preparation method according to the present invention, the parent die is attached to the tip of a loading pipe provided in the loading machine, and the loading is performed while maintaining the state in which the ignition signal transmission medium is housed in the pipe-shaped main body. By inserting the pipe into the blasting hole, the parent die is loaded in the vicinity of the hole end of the blasting hole.
The additional loading is loaded into the blasting hole by pumping the additional loading individually or collectively by the loading machine into the blasting hole.

The accommodation pipe of the ignition signal transmission medium according to the present invention includes a pipe-shaped main body that can be inserted into a rupture hole formed in the face, and the pipe-shaped main body includes an ignition signal transmission medium such as a leg wire or a fire guide tube. It is configured to be accommodated along the material axis direction, and is provided with a removal opening extending along the material axis direction and over the entire length, and the ignition signal transmission medium can be removed through the removal opening. It has become like.

By doing so, the pipe-shaped main body excludes the planned insertion portion by appropriately adjusting the degree of insertion so that the insertion depth into the rupture hole is within the predetermined range on the tip side of the pipe-shaped main body, so to speak, the planned insertion portion. The front side range, so to speak, the part to be exposed is exposed from the rupture hole without being inserted, and the proximal end side is separated from the face surface by the exposed length, and the ignition signal is transmitted in the pipe-shaped main body accordingly. The medium is also separated from the face surface by a distance corresponding to the above-mentioned exposed length, and hangs down from the base end side of the pipe-shaped main body in that state.

Therefore, it is possible to perform the wiring work of the ignition signal transmission medium at a place away from the face surface, and thus, even if the face falls off, it is possible to sufficiently secure the safety of the worker in the wiring work. Will be.

In addition, after the wiring work is completed, the pipe-shaped main body is pulled out from the breaking hole, and the ignition signal transmission medium is removed from the pipe-shaped main body through the removal opening, so that the accommodating pipe of the ignition signal transmission medium is removed from the face. Since they can be removed, they can be diverted to the next blast.

[Ignition signal transmission medium]
Applicable blasting includes electric blasting and detonator blasting, but in the case of electric blasting, the leg line extending from the electric detonator extends from the detonator with detonator in the case of blasting. Each detonator serves as an ignition signal transmission medium.

[Pipe-shaped body-length-]
It is assumed that the length of the pipe-shaped main body is set so that the planned insertion part is, for example, about 30 cm and the planned exposed part is, for example, about 100 cm. For the part to be exposed, the distance from the face surface is secured so that the worker can safely perform the wiring work even if the face falls off, so that it is stably held on the face without falling off. It suffices to set each so that it is done.

When inserting the pipe-shaped body into the rupture hole, by measuring the exposed length of the pipe-shaped body each time, whether or not the planned insertion part is inserted into the rupture hole as planned, or the planned exposed part is planned. It is possible to determine whether or not the face is exposed from the face, but the marking on the outer peripheral surface of the pipe-shaped body at the boundary between the part to be inserted and the part to be exposed so that the boundary can be identified. If the configuration is provided, the boundary between the planned insertion part and the planned exposure part can be easily visually observed, so that it is possible to prevent insufficient insertion or excessive insertion of the pipe-shaped main body, and insertion into the rupture hole. It is possible to prevent a situation in which the pipe-shaped main body falls out of the rupture hole during the connection work due to a shortage, or the connection work place cannot be sufficiently separated from the face surface due to excessive insertion.

Further, instead of this, in the pipe-shaped main body, a locking portion that is at the boundary position between the planned insertion portion and the planned exposed portion and is locked to the face opening of the blasting hole is provided on the outer peripheral surface thereof. If so, when the pipe-shaped main body is inserted into the blasting hole, the pipe-shaped main body is simply pushed into the blasting hole until the locking portion is locked to the face opening of the blasting hole. It is possible to more reliably prevent insufficient insertion and excessive insertion.

[Removal opening]
The removal opening has an opening shape and opening width as long as the ignition signal transmission medium can be removed from the pipe-shaped main body through the removal opening after the connection of the ignition signal transmission medium is completed. It is also possible to adopt, for example, a configuration in which a pipe-shaped main body is formed in a semi-cylindrical shape and an opening along the material axis direction is used as a removal opening.

In such a configuration, the ignition signal transmission medium can be easily removed, but the ignition signal transmission medium may be unintentionally detached from the pipe-shaped main body before or during the wiring work, or may fall out of the blasting hole. There is.

In that case, the central angle of the removal opening in the cross section may be less than 180 °, preferably less than 90 °.

According to this configuration, the central angle in the cross section of the pipe-shaped main body is larger than 180 ° and further larger than 270 °, and the ignition signal transmission medium is surrounded by the pipe-shaped main body. It is possible to prevent the ignition signal transmission medium from coming off the pipe-shaped main body before or during the work, and since the insertion portion of the pipe-shaped main body is firmly held in the rupture hole, it falls out of the rupture hole. Is definitely prevented.

In particular, when the central angle of the opening in the cross section is further reduced to be less than 45 ° to less than 30 °, the cross section of the pipe-shaped main body becomes C-shaped and the opening for removal becomes a slit shape. According to this, by inserting the pipe-shaped main body into the rupture hole so that the slit-shaped removal opening faces upward, the ignition signal transmission medium is prevented from coming off from the pipe-shaped main body before or during the connection work. It can be prevented more reliably.

[Pipe-shaped body-diameter and material-]
The diameter and material of the pipe-shaped body are as long as the ignition signal transmission medium can be accommodated in the inner space along the material axis direction and the ignition signal transmission medium in the accommodated state can be taken out through the removal opening. Optionally, the pipe-shaped body is formed of an elastic material so that it can contract and expand in the radial direction in a way that the opening width of the removal opening changes, and its outer diameter becomes larger than the inner diameter of the blasting hole. If the outer peripheral surface of the pipe-shaped main body is configured to be in contact with the inner peripheral surface of the blasting hole in the state of being inserted into the blasting hole, the blasting hole is formed during the connection work. While preventing it from falling out, the worker can easily pull it out when pulling it out.

The elastic material may be appropriately selected from the resin materials.

[Accommodation opening]
The parent die in which the lightning tube to which the ignition signal transmission medium is connected is embedded, and additional loads such as additional dies and anchors to be loaded thereafter shall be accommodated in the pipe-shaped main body through the end opening of the pipe-shaped main body. However, if the base end side of the pipe-shaped body is formed into a semi-cylindrical shape to form a storage opening and the storage opening is used as a part of the removal opening, the parent die or additional load can be piped. Since the operation of accommodating in the pipe-shaped main body is completed only by placing the pipe-shaped main body, the accommodation in the pipe-shaped main body becomes easier than pushing in the material axial direction from the end opening of the pipe-shaped main body.

In addition, if the parent die and the additional load are placed side by side on the pipe-shaped main body, they can be extruded together and can be loaded into the blasting hole all at once.

The accommodating opening is included not only when it is provided only on the base end side of the pipe-shaped main body, but also when it is provided over the entire length, that is, a configuration in which the pipe-shaped main body is formed in a semi-cylindrical shape.

[How to prepare for blasting]
In the blasting preparation method according to the present invention, first, the pipe-shaped main body constituting the accommodating pipe of the ignition signal transmission medium described above is inserted into the blasting hole so that the proximal end side thereof is positioned at a place separated from the face surface. ..

For positioning,
(a) Measure the exposed length of the pipe-shaped body each time.
(b) In the pipe-shaped main body, if the boundary position between the planned insertion part and the planned exposed part is provided with a marking on the outer peripheral surface thereof so that the boundary can be identified, the marking is the blasting hole. Adjust the degree of insertion to match the face surface
(c) In the case where the pipe-shaped main body has a configuration in which a locking portion to be locked to the face opening of the blasting hole is projected on the outer peripheral surface of the boundary position between the planned insertion portion and the planned exposure portion. May be appropriately selected from a method of pushing the pipe-shaped main body into the blasting hole until the locking portion is locked to the face opening of the blasting hole.

When inserting the pipe-shaped body into the blasting hole, the pipe-shaped body is made of an elastic material so that it can be contracted and expanded in the radial direction by changing the opening width of the removal opening, and its outer diameter is the blasting hole. If it is formed so as to be larger than the inner diameter of the pipe, the pipe-shaped main body is contracted in the radial direction before insertion and inserted into the blasting hole in that state.

In this way, when inserted into the blasting hole, the pipe-shaped body returns to its original diameter due to its elastic restoring force, and the outer peripheral surface of the pipe-shaped body comes into contact with the inner peripheral surface of the blasting hole. , It is possible to prevent the above-mentioned blasting hole from coming off.

Next, before and after the insertion step, the parent die in which the detonator to which the ignition signal transmission medium is connected is embedded is blasted so that the ignition signal transmission medium is housed in the pipe-shaped main body. Load near the buttock.

When the parent die is loaded into the rupture hole, it is accommodated in the pipe-shaped main body through the end opening on the base end side of the pipe-shaped main body or, if the accommodating opening is provided, through the accommodating opening. The parent die may be extruded using a pushing rod such as a pushing rod while maintaining the state in which the ignition signal transmission medium is housed in the pipe-shaped main body (hereinafter, this is referred to as manual loading). After attaching the parent die to the tip of the loading pipe provided in the loading machine, the loading pipe is placed in the pipe-shaped main body and advanced as it is, and then separated from the tip by air pressure or the like near the bottom of the rupture hole. (Hereinafter, this is referred to as machine loading).

Here, the order of inserting the pipe-shaped main body and loading the parent die is typically preceded by the former, but when the insertion of the pipe-shaped main body is completed, the ignition signal transmission medium extending from the parent die is pipe-shaped. It suffices if it is housed in the main body, and in the case of mechanical loading, after loading the parent die first, the pipe-shaped body is ruptured with the ignition signal transmission medium housed in the pipe-shaped body. You may insert it in.

Next, at the same time as the loading step of the parent die or after the loading step, additional loadings such as additional dies and anchors are loaded into the blasting holes in a form following the parent dies.

From the viewpoint of the loading order, the loading of the additional loading is roughly divided into a method of loading all of them separately from the parent die and a method of loading at least the additional loading located at the head together with the parent die. The method is further subdivided into a method of loading each additional load all together and a method of loading multiple times in any combination, and the latter method is further subdivided into a method of loading a part or all of the additional load together with the parent die. After loading, in some cases it is subdivided into a method of loading all the remaining additional loads together and a method of loading in multiple batches in any combination.

In addition, the loading of the additional load is roughly divided into manual loading and mechanical loading, and in the case of manual loading, as with the parent die, the pipe-shaped main body has an end opening on the base end side or a housing opening. If it is provided, the additional load accommodated in the pipe-shaped main body may be pushed out through the accommodating opening by using a pushing rod such as a push rod, and in the case of mechanical loading, it may be pushed out. The additional load may be pneumatically pumped through the loading pipe while the loading pipe provided in the loading machine is appropriately advanced and retracted in the pipe-shaped main body.

By the way, in manual loading, in addition to the basic function of separating the ignition signal transmission medium from the face surface, the pipe-shaped main body slides on the sliding surface with its inner peripheral surface as a sliding surface. It also has a so-called guidance function that smoothly and reliably loads the die and additional load into the blasting hole, but in mechanical loading, the pipe-shaped body has the basic function of separating the ignition signal transmission medium from the face surface. Will have only.

Next, the ignition signal transmission medium is connected.

Here, in the wiring work, the ignition signal transmission medium is housed in the pipe-shaped main body, and the base end side of the pipe-shaped main body is separated from the face surface, so that the ignition signal transmission medium is also separated from the face surface. It is in a state of hanging from the base end side of the pipe-shaped main body.

Therefore, it is possible to perform the wiring work of the ignition signal transmission medium at a place away from the face surface, and thus, even if the face falls off, it is possible to sufficiently secure the safety of the worker in the wiring work. Will be.

Further, if the central angle of the removal opening in the cross section is less than 180 °, preferably less than 90 ° before or during the connection work, the ignition signal transmission medium is pipe-shaped. Since the arrangement is surrounded by the main body, there is less concern that the ignition signal transmission medium will come off from the pipe-shaped main body, and the insertion portion of the pipe-shaped main body is firmly held in the rupture hole. It is also prevented from falling out.

In particular, when the central angle of the opening in the cross section is further reduced to be less than 45 ° to less than 30 °, the cross section of the pipe-shaped body is C-shaped and the removal opening is slit-shaped. Therefore, by inserting the pipe-shaped main body into the burst hole so that the slit-shaped removing opening faces upward, the ignition signal transmission medium can be more reliably prevented from falling off from the pipe-shaped main body.

After the connection is completed, the accommodating pipe of the ignition signal transmission medium is removed from the face by removing the ignition signal transmission medium from the pipe-shaped main body through the removal opening while pulling out the pipe-shaped main body from the blasting hole.

When pulling out the pipe-shaped main body from the blasting hole, the pipe-shaped main body inserted in the blasting hole may be used as it is, with a cylindrical wedge member, or after being contracted in the radial direction.

It is a figure which showed the accommodating pipe 1 of the ignition signal transmission medium which concerns on this embodiment, (a) is the whole perspective view which a part is omitted, and (b) is the whole side view which showed together with the arrangement situation. .. Explanatory drawing which showed the procedure of the blasting preparation method which concerns on this embodiment. An explanatory diagram showing the procedure of the blasting preparation method according to the present embodiment. Explanatory drawing which showed the operation of the accommodation pipe 1 of an ignition signal transmission medium and the blasting preparation method using it. Following FIG. 3, an explanatory diagram showing a procedure of a blasting preparation method according to the present embodiment. An overall perspective view of the accommodation pipe 61 of the ignition signal transmission medium according to the modified example, with a part omitted. The accommodation pipe of the ignition signal transmission medium according to another modification is shown, (a), (b), (c) are cross-sectional views, and (d) is the whole drawn with a part omitted. Perspective view. Further, the accommodation pipe of the ignition signal transmission medium according to another modification is shown, (a) is an overall perspective view drawn with a part omitted, and (b) and (c) are under normal conditions. The cross-sectional view and side view shown are the cross-sectional view and side view, and (d) and (e) are the cross-sectional view and side view shown in the state immediately before insertion. An overall perspective view of the accommodation pipe of the ignition signal transmission medium according to yet another modification, with a part omitted. It is a figure which showed the accommodation pipe of the ignition signal transmission medium which concerns on still another modification, (a) is the whole perspective view which a part is omitted, and (b) is the whole side view. Explanatory drawing which showed the procedure of the blasting preparation method in the case of machine loading.

Hereinafter, embodiments of the accommodating pipe of the ignition signal transmission medium according to the present invention and the blasting preparation method using the same will be described with reference to the accompanying drawings.

FIG. 1 is an overall perspective view of the accommodation pipe 1 of the ignition signal transmission medium according to the present embodiment, which is partially omitted, and an overall side view showing the arrangement state when the pipe 1 is arranged by the blasting preparation method. Is.

As shown in these figures, the accommodating pipe 1 of the ignition signal transmission medium is provided with a semi-cylindrical pipe-shaped main body 5, so that the vicinity of the tip thereof can be inserted into the blasting hole 4 formed in the face 3. It has become.

The pipe-shaped main body 5 has a leg line 2 as an ignition signal transmission medium connected to a detonator (not shown) embedded in a parent die 7 loaded in the bottom of the blasting hole 4, and an inner peripheral surface 8 thereof. It is placed on top and is configured to be accommodated along the material axis direction, and is provided with a removal opening 6 extending along the material axis direction and over the entire length, through the removal opening. The leg line 2 can be removed.

Here, the portion of the removal opening 6 extending to the proximal end side functions as a storage opening for accommodating the parent die 7 and the additional load described below to be loaded in the storage pipe-shaped main body 5. ..

In the pipe-shaped main body 5, a portion having a length L1 to be inserted into the blasting hole 4 (hereinafter, a portion to be inserted 11) and a portion having a length L ₂ to be exposed from the face ₃ (hereinafter, a portion to be exposed). At the boundary position with 12), a locking portion 10 to be locked to the face opening 9 of the blasting hole 4 is projected in a flange shape on the outer peripheral surface thereof.

In the pipe-shaped main body 5, the pipe-shaped main body 5 is stably held by the face 4 without falling out of the blasting hole 4 during the connection work for the planned insertion portion 11, and the skin of the exposed portion 12 is formed by the face 3. Even if a drop occurs, the distance from the face surface 21 may be set so that the worker can safely perform the connection work. For example, the length L ₁ of the planned insertion portion 11 may be set. For example, the total length may be determined so that the length L ₂ of the planned exposed portion 12 is about 30 cm, for example, about 100 cm, and the projecting position of the locking portion 10 may be determined.

The pipe-shaped main body 5 can have an outer diameter of about 38 mm and an inner diameter of about 36 mm, for example, and may be formed by appropriately selecting from known resin materials as the forming material.

In order to prepare for blasting using the accommodating pipe 1 of the ignition signal transmission medium according to the present embodiment, first, as shown in FIG. 2A, the pipe-shaped main body 5 of the accommodating pipe 1 of the ignition signal transmission medium is formed. The base end side is inserted into the blasting hole 4 so as to be positioned at a position separated from the exposed surface of the face 3 (hereinafter referred to as the face surface 21).

In positioning, the pipe-shaped main body is blasted in the blasting hole 4 until the locking portion 10 projecting from the outer peripheral surface of the pipe-shaped main body 5 is locked in the face opening 9 of the blasting hole 4 (FIG. 2B). Just push it into.

Next, the parent die 7 is loaded in the vicinity of the bottom of the blasting hole 4.

When loading the parent die 7 into the blasting hole 4, as shown in FIG. 2 (c), the parent die 7 is housed in the pipe-shaped main body in a form of being placed on the inner peripheral surface 8 of the pipe-shaped main body 5. At the same time, the leg line 2 extending from the parent die 7 is also housed in the pipe-shaped main body 5, and in this state, until the parent die 7 is arranged in the vicinity of the blasting hole 4 (FIG. 3 (a)). , The parent die may be pushed into the blasting hole 4 by using the pushing rod 22 which is a pushing rod (hereinafter, this is referred to as manual loading).

Next, as shown in FIG. 3 (b), the additional dies 31a, 31b and the anchors 32a, 32b, 32c, 32d as additional loads are loaded into the blasting hole 4 following the parent die 7.

When loading these additional loads into the blasting hole 4, the additional dies 31a and 31b and the anchors 32a to 32d are placed on the inner peripheral surface 8 of the pipe-shaped main body 5 in the same manner as the parent die 7. It may be housed in the main body, and in such a state, the additional loading thereof may be pushed into the blasting hole 4 with the insertion rod 22 and manually loaded until the shape follows the parent die 7 (FIG. 3 (c)).

Next, the leg line 2 is connected.

Here, the wiring work is the work of connecting the leg line 2 to the blasting bus 41 (or the auxiliary bus) as shown in FIG. 4A, but the base end side of the pipe-shaped main body 5 is L ₂ from the face surface 21. The leg wire 2 housed in the pipe-shaped main body 5 also hangs down from the base end side of the pipe-shaped main body ₅ in a form separated by L2 from the face surface 21 during the connection work. It will be in a state of being.

Therefore, the connection work of the leg line 2 can be performed at a place separated from the face surface 21.

Incidentally, conventionally, as shown in FIG. 4 (b), since the leg line 2 hangs down from the blasting hole 4 along the face surface 21, the connection work is performed in close proximity to the face surface 21 or FIG. 4 (c). ), Since it is necessary to extend the leg line 2 that hangs down along the face surface 21 to the front once the face surface 21 is approached, the leg line 2 that hangs down along the face surface 21 must be brought close to the face surface 21 in any case.

After the wiring work is completed, as shown in FIG. 5, the ignition signal is obtained by pulling out the pipe-shaped main body 5 from the blasting hole 4 and removing the leg wire 2 from the pipe-shaped main body 5 through the removal opening 6. The accommodating pipe 1 of the transmission medium is removed from the face 3.

As described above, according to the accommodating pipe 1 of the ignition signal transmission medium according to the present embodiment and the rupture preparation method using the pipe-shaped main body 5, the pipe-shaped main body 5 is formed from the rupture hole 4 without the planned exposure portion 12 being inserted. The base end side is separated from the face surface 21 by the exposed length L2, and the leg line ₂ housed in the pipe-shaped main body 5 corresponds to the above _- mentioned exposed length L2. It is separated from the face surface 21 by a distance, and in that state, hangs down from the base end side of the pipe-shaped main body 5.

Therefore, it is possible to perform the wiring work of the leg line 2 at a place separated from the face surface 21, and thus, even if the face 3 has a skin drop, the safety of the worker in the wiring work can be sufficiently ensured. It will be possible.

In addition, according to the blasting preparation method according to the present embodiment, the work of loading the parent die 7 and the additional load can be performed at a place away from the face surface 21, so that the skin is covered with the face 3 as in the wiring work. Even if a drop occurs, it is possible to sufficiently ensure the safety of workers.

Further, after the wiring work is completed, the ignition signal transmission medium is accommodated by removing the leg wire 2 from the pipe-shaped main body 5 through the removal opening 6 while pulling out the pipe-shaped main body 5 from the blasting hole 4. Since the pipe 1 can be removed from the face 3, it is also possible to divert them to the next blasting.

Further, according to the accommodating pipe 1 of the ignition signal transmission medium according to the present embodiment and the blasting preparation method using the pipe, it is the boundary position between the planned insertion portion 11 and the planned blasting portion 12 in the pipe-shaped main body 5. Since the locking portion 10 to be locked to the face opening 9 of the blasting hole 4 is projected on the outer peripheral surface thereof, the pipe-shaped main body is engaged when the pipe-shaped main body 5 is inserted into the blasting hole 4. By simply pushing the stop portion 10 into the blasting hole 4 until it is locked in the face opening 9 of the blasting hole 4, it is possible to reliably prevent insufficient insertion or excessive insertion of the pipe-shaped main body 5, and the blasting hole 4 can be reached. It is possible to prevent a situation in which the pipe-shaped main body 5 falls out of the blasting hole 4 during the connection work due to insufficient insertion, or the connection work place cannot be sufficiently separated from the face surface 21 due to excessive insertion. be able to.

Further, according to the accommodating pipe 1 of the ignition signal transmission medium according to the present embodiment and the rupture preparation method using the same, the pipe-shaped main body according to the present invention is composed of the pipe-shaped main body 5 formed in a semi-cylindrical shape. Therefore, the opening width of the removal opening 6 is increased, the leg line 2 can be easily accommodated and removed, and the portion extending toward the proximal end side thereof is loaded with the parent die 7 and the subsequent portion. It functions as a storage opening for accommodating the dies 31a, 31b and the anchors 32a, 32b, 32c, 32d in the pipe-shaped main body 5, and the pipe-shaped main body is simply placed on the pipe-shaped main body 5 through the accommodating opening. Since the operation of accommodating inward is completed, the accommodating work becomes easier than pushing in the material axis direction from the end opening of the pipe-shaped main body.

In addition, the parent die and the additional load can be placed side by side on the pipe-shaped main body 5 by using the base end side of the removal opening 6 that functions as the accommodation opening, so that these can be extruded together. , It is possible to load the blasting holes 4 all at once.

In the present embodiment, since it is premised on electric blasting, the ignition signal transmission medium is set to the leg line 2 extending from the electric detonator. The detonator extending from the detonator with a detonator serves as an ignition signal transmission medium.

Further, in the present embodiment, of the pipe-shaped main body 5, a locking portion that is at the boundary position between the planned insertion portion 11 and the planned exposed portion 12 and is locked to the face opening 9 of the rupture hole 4 on the outer peripheral surface thereof. By adopting a configuration in which the 10 is projected, the pipe-shaped main body 5 is surely prevented from being insufficiently inserted or excessively inserted. It may be the accommodating pipe 61 of the ignition signal transmission medium provided with the pipe-shaped main body 65 provided with the marking 62 which is the boundary position with the portion 12 and can identify the boundary on the outer peripheral surface thereof.

Even in such a configuration, the pipe-shaped main body 65 is inserted by visually observing the marking 62 and adjusting the insertion degree of the pipe-shaped main body 65 so that the marking coincides with the face opening 9 of the blasting hole 4. It is possible to prevent shortage and excessive insertion.

It should be noted that this modification has almost the same configuration and operation and effect as those of the above-described embodiment except for the configuration for adjusting the insertion degree of the pipe-shaped main body, but detailed description thereof is omitted here. do.

Further, in the present embodiment, the pipe-shaped main body according to the present invention is formed into a semi-cylindrical shape (FIG. 7 (a)), but in such a configuration, the leg line 2 can be accommodated and removed. On the other hand, it is easy, but there is a concern that the leg wire may be unintentionally detached from the pipe-shaped main body 5 before or during the connection work, or the pipe-shaped main body 5 may fall out of the blasting hole 4.

In that case, the central angle of the removal opening 6 in the cross section may be less than 180 °, preferably less than 90 °.

FIG. 7B shows a pipe-shaped main body 75a in which the central angle of the removal opening 6 in the cross section is less than 90 °.

According to such a configuration, since the leg wire 2 is arranged so as to be surrounded by the pipe-shaped main body 75a, it is possible to prevent the leg wire from coming off from the pipe-shaped main body 75a before or during the connection work. Since the insertion portion of the pipe-shaped main body 75a is firmly held in the blasting hole 4, it is surely prevented from coming off from the blasting hole.

In particular, when the central angle of the opening in the cross section is further reduced to be less than 45 ° to less than 30 °, the central angle is 30 ° as shown in FIGS. 7 (c) and 7 (d) as an example. According to the pipe-shaped main body 75b having a cross section of less than, the cross section is C-shaped and the removal opening is a slit-shaped removal opening 76. Therefore, the pipe-shaped main body 75b has the slit-shaped removal opening facing upward. By inserting the above into the rupture hole 4, it is possible to more reliably prevent the leg wire 2 from coming off from the pipe-shaped main body 75b before or during the connection work.

It should be noted that this modification can be applied to the already extended modification, and has almost the same configuration and action and effect as those of the above-described embodiment except for the configuration related to the cross section of the pipe-shaped main body. , Here, the detailed description thereof will be omitted.

Further, although not particularly mentioned in the present embodiment, as shown in FIG. 8, the pipe-shaped main body of the present invention is contracted and expanded in the radial direction by changing the opening width of the slit-shaped removal opening 76. It may be formed of an elastic material so as to be possible, and the outer diameter thereof may be larger than the inner diameter of the rupture hole 4.

According to such a configuration, in the state of being inserted into the blasting hole 4, the pipe-shaped main body 85 returns to the original diameter by its elastic restoring force, and the outer peripheral surface 87 of the pipe-shaped main body becomes the inner peripheral surface 86 of the blasting hole 4. Since they are in contact with each other, it is possible to prevent them from falling out of the blasting hole described above, and at the time of pulling out, the pipe-shaped main body 85 is shrunk in a direction in which its diameter is reduced so that the worker can easily pull it out. Is possible.

Further, this modification can be applied to the already extended modification, and as shown in FIG. 9, the marking 62 is provided on the outer peripheral surface instead of the locking portion 10 of the pipe-shaped main body 85. The pipe-shaped main body 95 can form the pipe-shaped main body of the present invention.

It should be noted that this modification has almost the same configuration and action and effect as those of the above-described embodiment except for the configuration relating to the elastic deformability of the pipe-shaped main body, but detailed description thereof will be omitted here.

Further, in the present embodiment, by adopting the pipe-shaped main body 5 formed in a semi-cylindrical shape, the leg wire 2 may be unintentionally detached from the pipe-shaped main body 5 as described above, or the pipe-shaped main body may be unintentionally detached. There remains a concern that the 5 will fall out of the blasting hole 4, and while this concern is resolved by adopting the removal opening 76 (FIGS. 7 to 9), in this configuration, the parent die 7 and the additional load are accommodated. There is a concern that the operation will be complicated.

In this case, of the pipe-shaped main bodies 75b, 85, 95, the base end side may be formed in a semi-cylindrical shape.

FIG. 10 is an overall perspective view and an overall side view showing a pipe-shaped main body 105 in which the base end side of the pipe-shaped main body 95 is formed in a semi-cylindrical shape instead of a shape having a C-shaped cross section. There is a removal opening 106b that also functions as a storage opening on the proximal end side, and a slit-shaped removal opening 106a on a portion other than the proximal end side, which constitutes the removal opening of the present invention.

According to this configuration, the parent die 7 and additional loading are prevented while preventing the leg wire 2 from being unintentionally detached from the pipe-shaped main body 5 or the pipe-shaped main body 5 from falling out of the blasting hole 4. Not only can objects be easily accommodated, but they can also be extruded all at once.

Further, in the present embodiment, after the parent die 7 is loaded, the additional dies 31a, 31b and the anchors 32a, 32b, 32c, 32d as additional loads are loaded into the blasting hole 4, but in this case, additional dies are added. All the loads may be loaded together, or any combination may be loaded in multiple batches.

Further, some of the additional loads on the leading side may be loaded together with the parent die 7.

Further, in the present embodiment, the parent die 7 and the additional load are pushed out by using the insertion rod 22 (manual loading), but instead of this manual loading, the loading machine is shown in FIG. 11 (a). After attaching the parent die 7 to the tip of the loading pipe 122 provided (not shown), the loading pipe is placed in the pipe-shaped main body 5 ((b) in the figure), advanced as it is, and then blasted. In the vicinity of the hole bottom of the hole 4, the additional load is separated from the tip by air pressure or the like, and then the additional load is pumped through the loading pipe 122 so as to be loaded into the blasting hole 4 as shown in FIG. Good (mechanical loading).

By the way, in machine loading, it is possible to pump the granular explosive as an additional die.

In the case of mechanical loading, the loading of the parent die 7 and the loading of the additional loading are preceded, and then the pipe-shaped main body is blasted so that the leg wire 2 is housed in the pipe-shaped main body 5. Although it may be inserted into 4, the tip of the pipe-shaped body is blasted while the leg line 2 hanging from the face opening 9 of the blasting hole 4 is scooped up from below by the pipe-shaped body 5. Since the work of inserting into 4 is not easy, it is desirable to perform the above procedure.

Even in manual loading, after loading the parent die 7 and, in some cases, further loading an additional load, the pipe-shaped main body is blasted so that the leg wire 2 is accommodated in the pipe-shaped main body 5. The procedure of inserting into 4 is not excluded, and even in this configuration, the connection work can be performed separately from the face surface 21, which is the same as the above-described embodiment, but is mechanically loaded. Similar to the case described, the work of inserting the tip of the pipe-shaped body into the blasting hole 4 while scooping up the leg line 2 hanging from the face opening 9 of the blasting hole 4 from below with the pipe-shaped body 5. Is not easy, and in addition, the parent die 7 and the additional load must be manually loaded in close proximity to the face surface 21, so it is desirable to do so in the order described in the embodiments.

Incidentally, in the manual loading in the procedure described in the embodiment, in addition to the basic function of separating the leg wire 2 from the face surface 21, the pipe-shaped main body 5 slides on the inner peripheral surface 8 as a sliding surface. It also has a so-called guidance function that the parent die 7 and additional load are smoothly and surely loaded into the blasting hole 4 by sliding on the surface, but in machine loading, the pipe-shaped main body 5 has a leg line 2 Will have only the basic function of separating the face 21 from the face surface 21.

1,61 Ignition signal transmission medium accommodation pipe 2 legs (ignition signal transmission medium)
3 Face 4 Blasting holes 5,65,75a, 75b, 85,95,105
Pipe-shaped body 6,76,106a
Detachment opening 7 Parent die 8 Inner peripheral surface 9 Face opening 10 Locking part 11 Scheduled insertion part 12 Scheduled exposure part 21 Face surface 31a, 31b Increased die (additional loading)
32a, 32b, 32c, 32d
Anko (additional loading)
62 Marking 86 Inner peripheral surface of blasting hole 4 87 Outer peripheral surface 106b of pipe-shaped main body 85 Detachment opening, accommodation opening

Claims (9)

It is equipped with a pipe-shaped body that is configured to accommodate ignition signal transmission media such as leg wires and fire guide tubes along the material axis direction and is inserted from the tip into the rupture hole formed in the face. By providing the pipe-shaped main body with a removal opening extending along the material axis direction and over the entire length, the ignition signal transmission medium can be removed from the pipe-shaped main body through the removal opening. A housing pipe for an ignition signal transmission medium, characterized in that it is. Locking at the boundary position between the portion of the pipe-shaped main body to be inserted into the blasting hole and the portion to be exposed from the face, which is locked to the face opening of the blasting hole on the outer peripheral surface thereof. The accommodating pipe for the ignition signal transmission medium according to claim 1, wherein the portion is projected. The first aspect of the present invention, wherein a marking is provided on the outer peripheral surface of the pipe-shaped main body, which is a boundary position between a portion to be inserted into the blasting hole and a portion to be exposed from the face, and the boundary can be identified. Ignition signal transmission medium accommodating pipe. The ignition signal transmission medium according to any one of claims 1 to 3, wherein the pipe-shaped main body is formed so as to have a C-shaped cross section, and the opening along the material axis direction is used as the removal opening. Containment pipe. The pipe-shaped main body is made of an elastic material so that the opening width of the removal opening can be changed to enable contraction and expansion in the radial direction, and the outer diameter thereof is larger than the inner diameter of the blasting hole. The accommodating pipe for the ignition signal transmission medium according to claim 4, wherein the outer peripheral surface of the pipe-shaped main body is in contact with the inner peripheral surface of the blasting hole by forming the pipe-shaped main body in a state of being inserted into the blasting hole. .. The invention according to any one of claims 1 to 5, wherein the base end side of the pipe-shaped main body is formed into a semi-cylindrical shape to form a storage opening, and the storage opening is a part of the removal opening. A housing pipe for the ignition signal transmission medium. The pipe-shaped main body constituting the accommodating pipe of the ignition signal transmission medium according to any one of claims 1 to 6 is inserted into the blasting hole so that the proximal end side thereof is positioned at a position separated from the face. ,
Before and after the insertion step, the parent die having a detonator to which the ignition signal transmission medium is connected is embedded in the blasting hole so that the ignition signal transmission medium is housed in the pipe-shaped main body. Load near the buttock and
At the same time as or after the loading step of the parent die, additional loadings such as additional dies and anchors are loaded into the blasting holes following the parent die.
The ignition signal transmission medium is connected and
After the connection is completed, the pipe-shaped main body is pulled out from the breaking hole, and the ignition signal transmission medium is removed from the pipe-shaped main body through the removal opening, whereby the accommodating pipe of the ignition signal transmission medium is removed from the face. A method of preparing for rupture, which is characterized by removing from. After the parent die is housed in the pipe-shaped body, the ignition signal transmission medium is maintained in a state of being housed in the pipe-shaped body, and the inner peripheral surface of the pipe-shaped body is used as a sliding surface. By pushing the parent die into the rupture hole by sliding it on the sliding surface, the parent die is loaded in the vicinity of the hole end of the rupture hole.
The additional load is housed individually or collectively in the pipe-shaped body, and then the additional load is slid on the sliding surface with the inner peripheral surface of the pipe-shaped body as a sliding surface. The blasting preparation method according to claim 7, wherein the additional load is loaded into the blasting hole by pushing it into the blasting hole individually or collectively. By attaching the parent die to the tip of the loading pipe provided in the loading machine and inserting the loading pipe into the blasting hole while maintaining the state in which the ignition signal transmission medium is housed in the pipe-shaped main body. The parent die was loaded in the vicinity of the bottom of the blasting hole, and the parent die was loaded.
The blasting preparation method according to claim 7, wherein the additional loading is loaded into the blasting hole by pumping the additional loading into the blasting hole individually or collectively by the loading machine.

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