WO2022196572A1

WO2022196572A1 - Explosive loading method, and detonation-use explosive mounting body

Info

Publication number: WO2022196572A1
Application number: PCT/JP2022/011032
Authority: WO
Inventors: 和彦水谷
Original assignee: 前田建設工業株式会社
Priority date: 2021-03-18
Filing date: 2022-03-11
Publication date: 2022-09-22
Also published as: JPWO2022196572A1; EP4310440A1

Abstract

Provided is an explosive loading method that enables smooth loading of a detonation-use explosive into a blasting hole drilled into a working surface of a tunnel in a tunnel blasting process. This explosive loading method includes: a step in which a loading rod holds a detonation-use explosive mounted body as a result of inserting the distal end of the loading rod into a hollow section of the detonation-use explosive mounted body which is formed by mounting a detonation-use explosive on the inside of the rear end of a cylindrical holding body so that a hollow section remains; and a detonation-use explosive loading step in which the detonation-use explosive mounted body held by the distal end of the loading rod is loaded into the blasting hole. The front end of the cylindrical holding body of the detonation-use explosive mounted body is provided with a spindle-shaped guide part that has a shape which is tapered toward the distal end of the detonation-use explosive mounted body.

Description

Explosive loading method and detonating explosive loading body

The present invention relates to an explosive loading method and an initiating explosive mounting body for loading an initiating explosive into a blast hole drilled in the face of a tunnel constructed by a blasting method.

The blasting method is known as a tunnel excavation method. When excavating a tunnel by the blasting method, an explosive with a detonator is inserted into multiple blast holes (charge holes) drilled in the face, and the detonator is detonated to detonate the explosive and excavate the face.

Conventionally, at tunnel sites constructed by the blasting method, it was common for workers to manually load explosives into the blast holes. This loading work involved pushing the explosives into the blast holes one by one using a long bar, which was quite labor intensive.

Therefore, using a hose or pipe, a parent dynamite for initiation (hereinafter sometimes abbreviated as "parent die") from a position away from the face surface, and an additional dynamite for increasing the blasting power at the time of blasting Techniques for charging dynamite (hereinafter sometimes abbreviated as "additional die") into blast holes have been proposed (see Patent Documents 1 to 3, for example). This type of explosive loading technique is also called mechanical loading (remote loading) or the like. As such mechanical loading, for example, a worker on a drill jumbo frame (cage) inserts the tip of a loading pipe into a blasting hole drilled in the face surface, and a hose connected to the loading pipe Compressed air is pumped from a loader provided at the proximal end of the die to the tip of the loading pipe, and the main die and the additional die are loaded into the charging hole by the loading pipe together with the compressed air.

Also, in order to improve the safety of loading explosives into blast holes and to save labor, an automatic explosive loading device that automatically loads explosives into blast holes has been proposed. For example, in Patent Document 4, a mounting frame, a loading pipe provided on the mounting frame so as to be able to advance and retract in the direction of loading an explosive, and a parent die provided on the mounting frame in front of the loading pipe to supply a parent die coaxially with the loading pipe. a possible parent die feed mechanism, a loading hose communicatively connected to the rear of the loading pipe, and an explosive loading mechanism coupled to the loading hose and pumping additional dies through the interior of the loading hose and loading pipe. An explosive autoloader is disclosed in which a parent die is insertable into the tip of a loading pipe. According to the description of Patent Document 4, the loading pipe is moved in the loading direction while the parent die is supplied to the tip of the loading pipe, the tip reaches the deepest part of the blasting hole, and the additional die is loaded. It is said that the main die and the additional die can be loaded into the blasting hole by pulling out the loading pipe from the blasting hole at the same time as feeding from the rear of the pipe.

Japanese Patent No. 2860847 Japanese Patent No. 5614139 Japanese Patent No. 5854923 JP-A-2008-25972

However, in the above-mentioned explosives mechanical loading technology, it was not easy to insert hoses and pipes for loading explosives into the blast hole from a position away from the face, and there was room for improvement in work efficiency. Further, in the automatic explosive loading technology disclosed in Patent Document 4, it is disclosed that the loading pipe is aligned so as to face the blast hole drilled in the face surface. It is conceivable that the loading pipe may be arranged with the axes of the loading pipe and the loading pipe being eccentric, and in such a case, it may be difficult to smoothly insert the loading pipe into the blast hole.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to make it possible to smoothly load a detonating explosive into a blast hole drilled in the face surface in a tunnel blasting method. To provide a convenient explosive loading method.

In order to solve the above problems, the present invention employs the following means. That is, the present invention is applied to a tunnel blasting method, and is an explosive loading method for loading a detonating explosive into a blast hole drilled in a face surface, wherein a hollow portion remains inside the rear end of a cylindrical holder. a step of holding the detonating explosive mounting body by the loading rod by inserting the tip of the loading rod into the hollow portion of the detonating explosive mounting body mounted with the detonating explosive, and and a detonating explosive loading step of loading the held detonating explosive mounting body into the blast hole, wherein the detonating explosive mounting body is mounted at the front end portion of the cylindrical holder in the detonating explosive mounting body. A conical guide portion is provided that tapers toward the tip.

Here, the leg wire extending from the detonator of the detonating explosive mounted on the detonating explosive mounting body is bound so that a ring-shaped portion having a diameter larger than the diameter of the blast hole is formed in the middle of the leg wire. In the process of loading the detonating explosive mounting body into the blasting hole in the detonating explosive loading step, the ring-shaped portion of the leg line is aligned with the opening of the blasting hole on the face surface. The binding material may be unbound by resistance to contact with the surrounding edge.

In addition, the present invention can be applied to a tunnel blasting method and can be specified as an initiating explosive mounting body that is loaded into a blasting hole drilled in the face surface. That is, the initiating explosive mounting body includes a tubular holder, an initiating explosive mounted inside the tubular holder, a hollow portion formed inside the rear end of the tubular holder, and the tubular holder. a conical guide provided at the front end of the shape holder and having a tapered shape toward the tip.

According to the present invention, in a tunnel blasting method, it is possible to provide an explosive loading method capable of smoothly loading a detonating explosive into a blast hole drilled in the face surface.

FIG. 1 is a diagram showing the overall schematic configuration when an explosive loading device for loading explosives into a plurality of blasting holes for blasting drilled in the face of a tunnel according to Embodiment 1 is mounted on a construction heavy machine. FIG. 2 is a front view showing an arrangement example of a plurality of blast holes formed in the face. FIG. 3 is a diagram illustrating the state after the blasting hole drilled in the face is charged with explosives. FIG. 4 is a side view of the parent die mount. FIG. 5 is an exploded view of the parent die mount. Figure 6 is a schematic side view of an explosive loader mounted on a guide cell; FIG. 7 is a schematic front view of an explosive loading device mounted on a guide cell; FIG. 8 is a diagram illustrating an additional explosive supply device. FIG. 9 is a front view of the parent die accommodation unit. FIG. 10 is a rear view of the parent die containing unit. FIG. 11 is a side view of the parent die containing unit. FIG. 12 is a top view of the parent die containing unit. FIG. 13 is a diagram illustrating various devices installed in the cockpit. FIG. 14 is a diagram showing a procedure flow of automatic explosive loading control. FIG. 15 is a diagram for explaining the state in which the rod alignment process is completed. FIG. 16 is a diagram for explaining the state of the detonating explosive loading process. FIG. 17 is a diagram for explaining the guide function of the conical guide portion in the parent die mounting body. FIG. 18 is a diagram for explaining the state in which the detonating explosive loading process is completed. FIG. 19 is a diagram for explaining the state in which the additional explosive loading process is completed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that each configuration and combination thereof in the embodiment is an example, and addition, omission, replacement, and other modifications of the configuration are possible as appropriate without departing from the gist of the present invention.

<Embodiment 1>
FIG. 1 shows an explosive loading device 1 for loading explosives into a plurality of blasting holes (charge holes) 3 drilled in a face surface (rock bed) 2 of a tunnel TN according to Embodiment 1, which is mounted on construction heavy equipment. It is a figure which shows the whole outline structure at time. The tunnel TN according to Embodiment 1 is constructed by a blasting method in which an explosive with a detonator is inserted into each blast hole 3 drilled in the face 2, and the detonator is detonated to explode the explosive and excavate the face 2. be done.

In FIG. 1, the explosive loading device 1 is mounted on the drill jumbo 10. Further, as shown in FIG. 1, a plurality of blast holes 3 are drilled in the face 2 with a predetermined drilling depth.

As shown in FIG. 1, the drill jumbo 10 includes a carriage 11 for self-propelled operation, a drilling boom 12 provided on the front side of the carriage 11, an explosive loading boom 13, an operator's seat 14, a control device 15, a driving It is equipped with a power unit (not shown) and the like. The drilling boom 12 and the explosive loading boom 13 are configured to be pivotably connected to the front end of the carriage 11, and extend and retract by the operation of a drive mechanism attached to the drilling boom 12 and the explosive loading boom 13. , tilting motion, swinging motion, rotating motion, and the like. In the example shown in FIG. 1, a pair of explosive loading booms 13 are provided on the drill jumbo 10, but the number of explosive loading booms 13 is not particularly limited.

A rock drilling machine 16 is rotatably supported on the drilling boom 12 . As the rock drilling machine 16, for example, a known machine that drills the blast hole 3 in the face surface 2 (rock rock) by impact motion and rotational action of an excavating drill is employed.

FIG. 2 is a front view showing an arrangement example of a plurality of blast holes 3 formed in the face surface 2. FIG. In this embodiment, the stepped blasting method is used for excavating the face surface 2 . In the stepped blasting method, a plurality of blasting target areas are set on the face surface 2, and blasting is performed by setting a time difference in the detonation timing of the detonator that detonates the explosive for each of the plurality of set blasting target areas.

The symbols #1 to #10 shown in FIG. 2 indicate the number of steps (corresponding to the blasting holes 3) to which the plurality of blasting holes 3 belong. In this embodiment, a plurality of blasting target areas are set on the face surface 2, and the number of steps corresponding to each blasting target area is assigned (installed). In the example shown in FIG. 2, 10 types of blasting target areas are set on the face surface 2, and the 1st stage #1 to the 10th stage #10 are assigned to each blasting target area. In FIG. 2, in order to facilitate understanding of the distribution of the steps #1 to #10 on the face surface 2, when the blast holes 3 belonging to the same step number are close to each other, those blast holes are grouped. They are connected by dashed lines. However, the arrangement pattern of the blast holes 3 shown in FIG. 2, the number of stages, the number of blast holes 3 belonging to each stage, and the like are not particularly limited.

FIG. 3 is a diagram explaining the situation after the blasting hole 3 drilled in the face 2 is charged with explosives. FIG. 3 shows a longitudinal section along the drilling direction (axial direction) of the blast hole 3 . Although details will be described later, in the present embodiment, explosives are not manually loaded into the blast holes 3 but are automatically loaded using the explosive loading device 1 .

In FIG. 3, reference numeral 3A denotes the innermost portion of the blast hole 3, and reference numeral 3B denotes the opening of the blast hole 3. Further, reference numeral 5 denotes a parent die mounting body in which a parent dynamite with a detonator (hereinafter abbreviated as "parent die") 4, which is an explosive for detonation, is mounted. Reference numeral 6 denotes additional dynamite (hereinafter abbreviated as "additional die") which is an additional explosive for increasing the blasting power at the time of blasting. Although the type of the increasing die 6 is not particularly limited, for example, granular explosives and bulk type explosives can be preferably used. However, the additional die 6 is not limited to granular explosives or bulk type explosives, and may be cartridge type explosives. In this embodiment, a granular explosive is used as an example.

4 is a side view of the parent die mounting body 5. FIG. FIG. 5 is an exploded view of the parent die mounting body 5. As shown in FIG. The parent die mounting body 5 has a hollow cylindrical (tubular) member 51 and a conical guide portion 52 connected to the front end 51A side of the cylindrical member 51 . contains the parent die 4. In this embodiment, the tubular member 51 of the parent die mounting body 5 is a cylindrical paper tube, and the conical guide portion 52 is also made of paper. However, the tubular member 51 and the conical guide portion 52 in the parent die mounting body 5 are not limited to being made of paper, and various materials can be used. The conical guide portion 52 has a conical shape and is attached to the front end 51A of the tubular member 51 coaxially with the tubular member 51 . Reference numeral 5A denotes the tip of the parent die mounting body 5. As shown in FIG. The tip portion 5A of the parent die mounting body 5 is formed by the tip-side vertex of the conical guide portion 52 . Reference numeral 5B denotes the rear end of the parent die mounting body 5, which is formed by the rear end of the cylindrical member 51. As shown in FIG. In the parent die mounting body 5 configured as described above, the outer diameter of the cylindrical member 51 is set smaller than the diameter of the blasting hole 3, and the parent die mounting body 5 is blasted as shown in FIG. The inside of the hole 3 can be loaded.

The parent die 4 employs, for example, a drug-containing hydrogen explosive, and is formed in the form of a packaged explosive (medicine-wrapped type) wrapped in paper, plastic film, or the like. The parent die 4 has a stepped detonator 41 to which a leg wire 42 is connected. For the stepped detonator 41 in this embodiment, for example, a detonator with a fuse (non-electrical detonator) can be adopted as a countermeasure against static electricity. However, the staged detonator 41 may be an electric detonator. When the stepped detonator 41 is an electric detonator, it is preferable that the cylindrical member 51 and the conical guide portion 52 in the parent die mounting body 5 are made of paper as a countermeasure against static electricity. The stepped detonator 41 has a delaying charge interposed between an ignition charge and a detonating charge contained inside a case, and a shock wave for actuation (actuating current in the case of an electric ) is supplied, the detonation time (reference time) is set for each type so that the detonation will occur after a certain delay. For the staged detonator 41, the detonation time may be set, for example, at intervals of several tenths of a second. Note that the stage detonator 41 may be, for example, a wireless detonator having a wireless detonator antenna (for example, a receiving coil) that receives AC magnetic field energy wirelessly transmitted from the detonator device. In the case of such a wireless detonator system, it is not necessary to connect the leg wire 42 to the stepped detonator 41 .

In the parent die mounting body 5, for example, a conical guide portion 52 is provided with a hole for pulling out the leg wire 42 to the outside, and the leg wire 42 is pulled out to the outside from the pull-out hole. Further, the length of the cylindrical member 51 is longer than the length of the parent die 4, and is mounted on the front end 51A side of the cylindrical member 51 as shown in FIG. Therefore, a hollow portion 53 is formed inside the rear end 51B side of the cylindrical member 51 . That is, the parent die mounting body 5 mounts the parent die 4 so that the hollow portion 53 remains inside the rear end of the tubular member 51 . Reference numeral 43 shown in FIGS. 4 and 5 is a binding material for binding the leg wires 42 . The binding material 43 binds the leg wires 42 in a loop and individually in the middle of the leg wires 42 to form a ring-shaped portion 42A in the middle of the leg wires 42 . In addition, the binding material 43 is made of paper, for example, and is made of an easily breakable material that can be easily broken by a small external force. there is As shown in FIG. 3, after the main die 4 and the additional die 6 mounted on the main die mounting body 5 are loaded into the blasting hole 3 of the face surface 2, the binding material 43 is torn and the leg line is broken. 42 has been untied. Further, as shown in FIG. 3, when the loading of the parent die mounting body 5 into the blasting hole 3 is completed, the leading end portion 5A of the parent die mounting body 5 is positioned at the innermost portion 3A of the blasting hole 3. .

Next, the configuration of the explosive loading device 1 will be explained in detail. The explosive loading device 1 is mounted on a guide cell 20 of an explosive loading boom 13, as shown in FIG. FIG. 6 is a schematic side view of the explosive loading device 1 mounted on the guide cell 20. FIG. FIG. 7 is a schematic front view of the explosive loading device 1 mounted on the guide cell 20. FIG. FIG. 6 shows the front-rear direction of the guide cell 20 . The explosive loading boom 13 is provided with a drive mechanism (not shown) for driving the guide cell 20. By this drive mechanism, the guide cell 20 can be swung horizontally, vertically, and It can freely move back and forth. A guide cell 20 attached to an explosive loading boom 13 uses an explosive loading device 1 mounted on a drill jumbo 10 to automatically load explosives (primary die 4, additional die 6) into the blast hole 3 of the face 2. , the front side is arranged toward the face surface 2 side, and the rear side is arranged toward the carriage 11 side.

As shown in FIGS. 6 and 7, the explosive loading device 1 has a parent die supply device 70 mounted on the guide cell 20, a loading rod 81, a loading rod feeding mechanism 80, and the like. Although details will be described later, the parent die supply device 70 (initiation explosive supply device) includes a parent die accommodation unit 100 (initiation explosive accommodation unit) that accommodates a plurality of parent die mounted bodies 5 and a parent die accommodation unit 100. It is configured to include a driving parent die containing unit driving mechanism 90 (initial explosive containing unit driving mechanism).

A loading rod feeding mechanism 80 is attached to the rear end side of a long pipe-shaped loading rod 81 extending in one direction. The loading rod feeding mechanism 80 moves the loading rod 81 in a posture in which the axial direction of the loading rod 81 is parallel to the extending direction of the guide cell 20, with the tip 811 of the loading rod 81 directed toward the front side of the guide cell 20. keeping. An arrow X shown in FIG. 6 indicates a preset loading direction of the detonating explosive. In this embodiment, the central axis C1 of the loading rod 81 is parallel to the loading direction X of the detonating explosive, and the loading rod 81 is held by the loading rod feeding mechanism 80 so as to be driven forward and backward along the loading direction X of the detonating explosive. It is The outer diameter of the tip 811 of the loading rod 81 is slightly smaller than the inner diameter of the rear end 5B of the parent die mounting body 5 (cylindrical member 51). Therefore, by inserting the front end 811 of the loading rod 81 into the hollow portion 53 from the rear end portion 5B side of the parent die mounting body 5 (cylindrical member 51), the parent die mounting body 5 is attached to the front end 811 side of the loading rod 81. can hold.

Although the material for forming the loading rod 81 is not particularly limited, it is preferable to use a member having a certain degree of rigidity, such as synthetic resin. Further, the guide cell 20 does not hinder the forward/backward movement of the loading rod 81 along the detonating explosive loading direction X, and supports the posture of the long loading rod 81 parallel to the detonating explosive loading direction X. A support member 21 may be provided.

The loading rod feeding mechanism 80 attached to the guide cell 20 can advance and retreat along the front-rear direction of the guide cell 20 . The loading rod feed mechanism 80 may be composed of, for example, a drifter supported on the upper surface of the guide cell 20, and is guided by the guide cell 20 to reciprocate along the longitudinal direction of the guide cell 20. . The loading rod feeding mechanism 80 can move back and forth along the extension direction of the guide cell 20 by, for example, operation of a feeder (not shown). The feeder, which is the driving source of the loading rod feeding mechanism 80, can be composed of, for example, a hydraulic cylinder or the like, but the loading rod feeding mechanism 80 may be driven by an electric driving source.

As shown in FIG. 6, the loading rod 81 has a hollow pipe shape with a hollow passage 812 formed therein. A pressure-feeding hose 82 for pressure-feeding the additional die 6 (additional explosive) is connected to the rear end side of the loading rod 81 so as to communicate with the hollow passage 812 . The pumping hose 82 may be made of a synthetic resin hose, a rubber hose, or the like.

FIG. 8 is a diagram illustrating an additional explosive supply device 83 that feeds and feeds the additional die 6 to the loading rod 81 through a pressure feed hose 82 . The supplementary explosive supply device 83 is mounted, for example, on a loading platform of a work vehicle 200 (see FIG. 1) arranged on the rear side of the drill jumbo 10 with respect to the face surface 2 . However, the additional explosive supply device 83 may be mounted on the drill jumbo 10, or may be arranged at another location. The additional explosive supply device 83 includes an air compressor (pneumatic feeder) 84, a hopper 85 for storing the additional die 6, a chute 86, a pressure feed hose 82, an air supply hose 87, a junction pipe 88, and the like. The hopper 85 has, for example, a transfer mechanism 89 capable of automatically weighing the stored increasing dies 6 and delivering a preset amount of increasing dies 6 to the chute 86 . As such a transfer mechanism 89, for example, a rotary valve or the like may be adopted. Furthermore, a merging pipe 88 is connected to the lower end of the chute 86 , and a pressure-feeding hose 82 is connected to the merging pipe 88 . An air supply hose 87 extending from the air compressor 84 is connected to the junction pipe 88 . Therefore, the increasing die 6 transferred from the hopper 85 to the chute 86 by the operation of the transfer mechanism 89 joins with the compressed air supplied from the air compressor 84 through the air supply hose 87 in the junction pipe 88, and together with the compressed air, the increasing die 6 is pumped through the pumping hose 82 toward the hollow passage 812 of the loading rod 81 .

Next, returning to FIGS. 6 and 7, the parent die supply device 70 will be described. As described above, the parent die supply device 70 includes the parent die housing unit 100 (initial explosive housing unit) and the parent die housing unit driving mechanism 90 (initial explosive housing unit) for holding and driving the parent die housing unit 100 (detonation explosive housing unit). Explosive storage unit drive mechanism). Further, the main die housing unit driving mechanism 90 has a fixed portion 91 fixed to the guide cell 20 and a slider 92 provided so as to be interposed between the fixed portion 91 and the main die housing unit 100 . is doing.

The slider 92 has a mounting portion 93 on which the parent die housing unit 100 can be mounted and fixed, and a drive portion 94 interposed between the mounting portion 93 and the fixing portion 91 . In the examples shown in FIGS. 6 and 7, the parent die housing unit 100 is a housing box having a substantially rectangular parallelepiped shape. The mounting portion 93 of the slider 92 is composed of, for example, a flat steel plate on which the bottom of the parent die housing unit 100 can be placed and fixed. The parent die housing unit 100 is held in a posture parallel to it. Further, the slider 92 of the parent die housing unit driving mechanism 90 can reciprocate the parent die housing unit 100 held on the mounting portion 93 along the predetermined loading orthogonal direction Y. FIG. The loading orthogonal direction Y is a direction orthogonal to the aforementioned detonating explosive loading direction X, and corresponds to the width direction of the guide cell 20 in this example. The driving portion 94 of the slider 92 includes, for example, a linear shaft provided on one side of the mounting portion 93 and the fixed portion 91 and extending along the loading orthogonal direction Y, and a linear bushing housing provided on the other side and receiving the linear shaft. It may be a direct acting mechanism including a unit. However, the driving portion 94 of the slider 92 is not limited to the linear motion mechanism having the above configuration.

The parent die housing unit driving mechanism 90 is controlled by the control device 15 so that the parent die 4 having the initiation time corresponding to the number of steps of the target blasting hole 3 to be charged with the explosive is attached to the parent die 4. The mounting body 5 is fed to a predetermined detonating explosive supply position coaxially forward of the loading rod 81 .

9 to 12 are diagrams for explaining the parent die housing unit 100. FIG. FIG. 9 is a front view of the parent die housing unit 100. FIG. FIG. 10 is a rear view of the parent die housing unit 100. FIG. 11 is a side view of the parent die housing unit 100. FIG. 12 is a top view of the parent die housing unit 100. FIG. The parent die accommodating unit 100 is a substantially rectangular parallelepiped case that accommodates a plurality of parent die mounting bodies 5 and whose outer shape is defined by a front surface 101 , a rear surface 102 , a pair of side surfaces 103 , an upper surface 104 and a bottom surface 105 . Further, the direction perpendicular to the front-back direction and the up-down direction in the parent die accommodating unit 100 is called the width direction. Each direction of the parent die accommodating unit 100 shown in FIGS. 9 to 12 indicates the relative positional relationship of each element of the parent die accommodating unit 100. FIG.

A rear wall 110, a side wall 120, and a bottom wall 130 are provided on the rear surface 102, the pair of side surfaces 103, and the bottom surface 105 of the parent die housing unit 100, respectively. Also, the upper surface 104 of the parent die housing unit 100 is open.

The interior of the parent die housing unit 100 is partitioned into a plurality of sorting housing sections 150 by partition walls 140 . In the present embodiment, nine partition walls 140 are arranged at intervals in the width direction of the parent die accommodation unit 100, and the interior of the parent die accommodation unit 100 is divided into first sorting and accommodation sections 150 (#1) to It is partitioned into the tenth sorting storage section 150 (#10). Each partition wall 140 is arranged parallel to the side surface 103 (side wall 120 ) and extends from the front surface 101 to the rear surface 102 . Each partition wall 140 is arranged at regular intervals in the width direction of the parent die accommodating unit 100 . As a result, the width dimension of each sorting container 150 is equal to each other. As shown in FIGS. 6 and 7, the parent die housing unit 100 has a posture in which the longitudinal direction is parallel to the loading direction X of the detonating explosive and the width dimension is parallel to the loading orthogonal direction Y, and the slider 92 is installed on the mounting portion 93 of the . As described above, the sorting and accommodating sections 150 in the parent die accommodating unit 100 are arranged side by side along the loading orthogonal direction Y. As shown in FIG. That is, the front-rear direction of each sorting accommodation portion 150 in the parent die accommodation unit 100 is parallel to the loading orthogonal direction Y and the central axis C1 of the loading rod 81 .

In a plurality of sorting and accommodating sections 150 (#1 to #10) of the parent die accommodating unit 100, the parent die mounted bodies 5 mounted with the parent dies 4 having different detonation times in the stepped detonators 41 are sorted and accommodated. It is configured so that it can be Each sorting storage unit 150 can store a plurality of detonating explosives having the same detonation time. In the step blasting method according to the present embodiment, as described with reference to FIG. 2, the first step #1 to the tenth step #10 are assigned to each blasting target area set on the face surface 2 . Here, if the blasting holes 3 belonging to (associated with) the 1st stage #1 to the 10th stage #10 are defined as the 1st stage blasting hole 3 (#1) to the 10th stage blasting hole 3 (#10) , 1st stage blasting hole 3 (#1) to 10th stage blasting hole 3 (#10) are equipped with a parent die 4 having an initiation time corresponding to the number of steps #1 to #10. The die mounting body 5 (#1) to the tenth parent die mounting body 5 (#10) are loaded. In the parent die accommodating unit 100, the first parent die mounting body 5 (#1) to the tenth parent die mounting body 5 ( #10) are sorted and stored. Although the number of parent die mounted bodies 5 that can be accommodated in each sorting container 150 is not particularly limited, each sorting container 150 can contain, for example, about five parent die mounted bodies 5 . Of course, according to the number of blast hole groups belonging to each stage set on the face surface 2, the storage capacity of the parent die mounting bodies 5 in each sorting storage section 150 may be increased or decreased. As is clear from FIGS. 11 and 12, the front end portion 5A of the parent die mounting body 5 in each sorting container 150 is positioned on the front surface 101 side, and the rear end portion 5B is positioned on the rear surface 102 side. are housed in

Here, the width dimension of each sorting accommodation portion 150 corresponds substantially to the outer diameter of the cylindrical member 51 in the parent die mounting body 5 (the dimension may be slightly larger than the outer diameter of the cylindrical member 51). is set to For this reason, each sorting and accommodating section 150 accommodates a plurality of parent die mounted bodies 5 arranged in a row in the vertical direction and arranged in multiple stages. Below, a plurality of parent die mounted bodies 5 housed in each sorting housing portion 150 are sorted from the side closest to the bottom surface 105 (bottom wall 130) to the lowermost (first stage) parent die mounted body 5, the second stage , . . . are called the top parent die mounting body 5.

The rear wall 110 of the parent die housing unit 100 covers the rear surface 102 while leaving the lower area of the rear surface 102 as an opening. Therefore, a "rod insertion opening 106" is formed as an opening in the lower region of the rear surface 102 of each sorting container 150. As shown in FIG. The rod insertion port 106 is an opening for inserting the loading rod 8 forwardly driven along the detonating explosive loading direction X by the loading rod feeding mechanism 80 described in FIG. The height dimension of the rod insertion opening 106 is larger than the outer diameter of the tubular member 51 in the parent die mounting body 5 and smaller than twice the outer diameter of the tubular member 51 .

Also, the front surface 101 of the parent die housing unit 100 is provided with a stop plate 160 that partially covers the front surface 101 . As shown in FIGS. 9 and 12, a stop plate 160 is attached to the front end of the partition wall 140 in each of the plurality of sorting storage units 150 . The partition wall 140 in each sorting container 150 is arranged such that the discharge port 107 is formed in the lower region of the front surface 101 of each sorting container 150 . This discharge port 107 is an opening for discharging the bottom (first) parent die mounting body 5 accommodated in each sorting container 150 to the outside, and corresponds to an explosive discharge port for detonation. The discharge port 107 formed on the front surface 101 side of each sorting container 150 is arranged to face the rod insertion port 106 formed on the rear surface 102 side. Similarly to the rod insertion port 106, the height dimension of the discharge port 107 in each sorting container 150 is also greater than the outer diameter of the cylindrical member 51 in the parent die mounting body 5, and the outer diameter of the cylindrical member 51 has a dimension smaller than twice the Therefore, each sorting storage section 150 can eject only the parent die mounting body 5 at the bottom (first stage) to the outside through the ejection port 107 .

In addition, the stopper plate 160 prevents the mother die mounted bodies 5 positioned from the second stage to the uppermost stage of each sorting container 150 from being ejected to the outside from the front surface 101 . Here, the width dimension of the stopper plate 160 is smaller than the width dimension of each sorting container 150 . For this reason, a leg wire lead-out opening 108 is formed on the side (side) of the stop plate 160 in each sorting container 150, and the leg wire 42 of the parent die mounting body 5 can be pulled out to the outside through the leg wire lead-out opening 108. can. In addition, in FIG. 9, the leg lines 42 are shown only for a portion of the parent die mounting body 5 accommodated in the parent die accommodation unit 100 for drawing purposes.

Furthermore, each sorting container 150 of the parent die container unit 100 is provided with a pressing mechanism 170 that presses the parent die mounting bodies 5 housed in each sorting container 150 downward (bottom surface 105). . Although the specific configuration of the pressing mechanism 170 is not particularly limited, for example, it includes a strip-shaped pressing plate 171 and a torsion spring (torsion spring) 172 interposed between the pressing plate 171 and the rear wall 110 . may be Reference numeral 171A shown in FIG. 11 denotes a rotation shaft provided on the base end side of the pressing plate 171. As shown in FIG. The rotation shaft portion 171A of each pressing plate 171 may be supported by the partition wall 140 or the side wall 120 . Further, the pressing plate 171 is urged in the A direction shown in FIG. 11 by the elastic force of the torsion spring 172 . Therefore, the pressing plate 171 of the pressing mechanism 170 can always press the parent die mounting bodies 5 housed in the sorting housing portions 150 downward (bottom surface 105). As a result, even if the attitude of the parent die housing unit 100 becomes oblique due to the driving of the explosive loading boom 13 and the guide cell 20, the lowermost (first step) parent die mounting body 5 can be placed on the bottom surface 105 (bottom surface). It can always be pressed against the wall 130).

The explosive loading system S including the explosive loading device 1 configured as described above is applied to a stepped blasting method in which blasting is performed with a time difference for each of a plurality of blasting target areas assigned to the face surface 2 of the tunnel TN. This is an automatic explosive loading system that automatically loads explosives into a plurality of blasting holes 3 drilled in a surface 2 using an explosive loading device 1 for automatic explosive loading control. The explosive loading system S in this embodiment includes the above-described drill jumbo 10, the additional explosive supply device 83, and the control device 15. The control device 15 controls the explosive loading device 1 and the additional explosive supply device 83, thereby Control automatic loading.

Details of the explosive automatic loading control executed by the control device 15 will be described below. FIG. 13 is a diagram illustrating various devices installed in the cockpit 14. As shown in FIG. The cockpit 14 is provided with a monitor (display device) 210, a control device 15, and an input device to the control device 15 (charge remote control switch 231, operation panel 232, keyboard 233, pointing device 234, etc.). . The drill jumbo 10 is operated by a worker using various devices of the input device to manually operate the drilling boom 12, the explosive loading boom 13, the guide cell 20, the explosive loading device 1, the additional explosive feeding device 83, etc. in the drill jumbo 10. It is possible to operate. In the automatic explosive loading control, the control device 15 controls the explosive loading boom 13, the guide cell 20, the explosive loading device 1, etc., so that the blast hole 3 drilled in the face 2 is fully or semi-automatically controlled. A parent die 4 and an additional die 6 can be loaded. The control device 15 is, but not limited to, a computer including an input unit, a processing unit, an output unit, and the like. The processing unit of the control device 15 can include a processor for executing various programs, a storage device (storage unit) for storing various programs and various information required for the operation of the processor, and the like.

The work procedure for automatic explosive loading control executed by the control device 15 of the automatic explosive loading system S will be described below. FIG. 14 is a diagram showing a procedure flow of automatic explosive loading control executed by the controller 15 of the automatic explosive loading system S. As shown in FIG. First, as shown in FIG. 1, the carriage 11 of the drill jumbo 10 is driven to move close to the face 2 to be blasted, and the boom 12 for drilling is sequentially moved to the planned drilling position of the face 2 according to the blasting pattern. Then, a plurality of

blast holes

3, 3, . When the rock drilling machine 16 of the drill jumbo 10 drills the blast holes 3, the control device 15 associates all the blast holes 3 with hole numbers. Then, for each hole number of the blasting hole 3, the first coordinate P1 (X1, Y1, Z1) of the hole mouth 3B corresponding to the hole number and the second coordinate P2 (X2, Y2, Z2) of the deepest part 3A Blast hole position information including three-dimensional coordinate values and blast hole step information associated with the step number of the blast hole 3 corresponding to the hole number are stored in a storage device (storage step). The drill jumbo 10 may be a full-automatic drill jumbo (also called a “computer drill jumbo”). By automatically controlling the boom 12 and the rock drilling machine 16 , the blast holes 3 may be drilled sequentially at the planned drilling positions on the face surface 2 . In addition, in the example shown in FIG. 2, the first stage #1 to the tenth stage #10 are assigned to the face 2 for each blasting target area, and in step S1, the first stage #1 of the face 2 A first-stage blasting hole 3 (#1) to a tenth-stage blasting hole 3 (#10) each including one or a plurality of blasting hole groups are drilled for the first to tenth stages #10. In addition, the parent die 4 having the initiation time set in association with each step number is inserted into the first stage blasting hole 3 (#1) to the tenth stage blasting hole 3 (#10).

Next, the explosive loading boom 13 is placed near the face 2 in which the blast hole 3 is drilled by operation via an input device (for example, the operation panel 232). Further, as shown in FIG. 1, a working vehicle 200 is arranged behind the drill jumbo 10, and a predetermined amount of additional dies 6 are put into the hopper 85 of the additional explosive supply device 83. As shown in FIG.

Next, in step S2, the first coordinate P1 (X1, Y1, Z1) and the second coordinate P2 (X2, Y2, With reference to the blast hole position information including the three-dimensional coordinate value of Z2), the explosive loading boom 13 and the guide cell 20 of the drill jumbo 10 are automatically driven, and among the blast holes 3 drilled at multiple locations on the face surface 2 , the loading rod 81 is aligned so that the tip of the loading rod is coaxially opposed to the loading target blasting hole 3 _TGT to which the explosives (parent die 4, additional die 6) should be loaded this time (rod alignment step ). As described above, when each blast hole 3 is drilled in the face surface 2 by the rock drilling machine 16 of the drill jumbo 10, the control device 15 controls the first coordinate P1 (X1, Y1, Z1) and the second coordinate P2 (X2, Y2, Z2) of the deepest part 3A are associated with the hole number, and the blast hole related to the number of stages of the blast hole 3 corresponding to the hole number. and are stored in the storage device in association with each other. Therefore, the control device 15 refers to this blasting hole position information and reads out the first coordinates P1 (X1, Y1, Z1) and the second coordinates P2 (X2, Y2, Z2) corresponding to the loading target blasting hole 3 _TGT . Thus, the loading rod 81 can be aligned so that the tip 811 of the loading rod 81 faces the blast hole 3 _TGT to be loaded. FIG. 15 is a diagram for explaining the state in which the rod alignment process is completed. Hereinafter, the position of the loading rod 81 in the state where the rod alignment process is completed is referred to as "rod alignment completed position". In FIG. 15, the central axis C1 of the loading rod 81 arranged at the rod alignment completion position is coaxial with the central axis C2 of the blast hole 3 _TGT to be loaded, and the tip 811 of the loading rod 81 , the blast hole 3 to be loaded is arranged at a position spaced apart from the opening 3B of the _TGT by a predetermined dimension. In the state where the loading rod 81 is arranged at the rod alignment completion position, the distance between the tip 811 of the loading rod 81 and the hole 3B (hereinafter referred to as "the initial distance between the rod holes") is not particularly limited.

Next, the control device 15 refers to the blast hole stage number information and controls the parent die housing unit drive mechanism 90 to set the explosive loading boom 13 (guide cell 20) in front of the loading rod 81. The parent die storage unit 100 (initiation explosive storage unit) is moved along the loading orthogonal direction Y, and the parent die 4 (initiation explosive) having the initiation time corresponding to the number of stages of the blasting hole 3 _TGT to be loaded is loaded into the rod. It is supplied to the detonating explosive supply position located coaxially forward of 81 (initial explosive supplying step). In the above configuration example, the inside of the parent die accommodating unit 100 is divided into the first sorting and accommodating section 150 (#1) to the tenth sorting and accommodating section 150 (#10). Therefore, the control device 15 supplies the parent die mounting body 5 mounted with the parent die 4 having the initiation time corresponding to the stage number of the blast hole 3 _TGT to be loaded to the above-described initiation explosive supply position. .

As described above, the parent die housing unit 100 has a plurality of sorting and housing sections 150 capable of mutually sorting and housing the parent die mounted bodies 5 mounted with the parent dies 4 (detonating explosives) having the detonation time. It is provided so as to be able to reciprocate along the charging orthogonal direction Y with respect to the explosive loading boom 13 (guide cell 20). The sorting storage units 150 are arranged along the loading orthogonal direction Y and are provided reciprocatingly along the loading orthogonal direction perpendicular to the loading direction. Therefore, in the detonating explosive supply process, the control device 15 automatically controls the main die housing unit drive mechanism 90 to move the main die housing unit 100 along the loading orthogonal direction Y, thereby Blasting hole 3 Sorting storage in which parent die mounted bodies 5 (hereinafter referred to as "loading target parent die mounted bodies 5 _TGT ") mounted with parent dies 4 set with detonation seconds corresponding to the number of stages of _TGT are stored. A section 150 (hereinafter referred to as a “loading target sorting and containing section 150 _TGT ”) can be arranged at a detonating explosive supply position located coaxially in front of the loading rod 81 .

Further, in the present embodiment, on the explosive loading boom 13 (guide cell 20), the parent die mounting body 5 is accommodated in the lowest stage (first stage) of each sorting accommodation section 150 of the parent die accommodation unit 100. is held by the parent die housing unit 100 installed on the mounting portion 93 of the slider 92 and the loading rod feeding mechanism 80 so that the height of the center axis of the loading rod 81 substantially coincides with the height of the center axis C1 of the loading rod 81 The installation relationship of the loading rod 81 is defined. Further, the width dimension of each sorting container 150 in the parent die container unit 100 is set to a dimension substantially corresponding to the outer diameter of the cylindrical member 51 in the parent die mounting body 5 as described above. Therefore, the parent die mounting bodies 5 are accommodated in the sorting and accommodating sections 150 in a state in which the central axis positions of the parent die mounted bodies 5 (cylindrical members 51) are aligned with the center positions in the width direction of the respective sorting and accommodating sections 150. there is In the above-described detonating explosive supply process, the control device 15 controls the main die so that the center position in the width direction of the loading object sorting and storing section 150 _TGT is arranged coaxially with the loading rod 81 (on the extension line of the central axis C1). The storage unit 100 is moved. As a result, the central axis of the parent die mounting body 5 _TGT to be loaded, which is housed in the lowest stage (first stage) of the sorting and storing part 150 _TGT to be loaded, can be arranged coaxially with the central axis C1 of the loading rod 81. can.

Here, for example, when the number of stages of the blasting hole 3 _TGT to be loaded is the eighth stage #8 (that is, when the blasting hole 3 _TGT to be loaded is the eighth stage blasting hole (#8)), the control device Reference numeral 15 designates the widthwise center position of the eighth sorting/accommodating section 150 (#8) in which the eighth parent die mounting body 5 (#8) as the loading target parent die mounting body 5 _TGT is accommodated. The slider 92 is actuated so that it is arranged on the upper front side (on the extension line of the central axis C1). As a result, the central axis of the eighth parent die mounting body 5 (#8) accommodated in the lowest stage (first stage) in the eighth sorting and accommodating section 150 (#8) as the loading target sorting and accommodating section 150 _TGT is loaded. It can be arranged coaxially with the central axis C<b>1 of the rod 81 . As a result, the eighth parent die mounting body 5 (#8) serving as the loading target sorting and receiving section 150 _TGT can be positioned at the initial explosive supply position coaxially in front of the loading rod 81 .

Next, in step S3, the control device 15 automatically controls the loading rod feeding mechanism 80 to advance the loading rod 81 along the detonating explosive loading direction X, and feeds the loading target parent die to the detonating explosive supply position. While holding the mounting body 5 _TGT at the tip 811 of the loading rod 81, the parent die mounting body 5 _TGT to be loaded is loaded into the innermost portion 3A of the blast hole 3 _TGT to be loaded (initial explosive loading step).

As described above, each sorting container 150 of the parent die container unit 100 has the discharge port 107 formed in the lower region of the front surface 101 . Therefore, when the loading rod feeding mechanism 80 forwards the loading rod 81 along the loading direction X of the detonating explosive, the loading rod 81 is fed from the rod insertion opening 106 corresponding to the loading target sorting storage section 150 _TGT in the parent die storage unit 100 . tip 811 of the can be inserted.

The parent die mounting body 5 mounts the parent die 4 so that the hollow portion 53 remains inside the rear end of the tubular member 51 . Therefore, in the process of loading the detonating explosive, the tip 811 of the loading rod 81 inserted from the rod insertion opening 106 into the loading target sorting storage section 150 _TGT is attached to the loading target parent die positioned at the bottom of the loading target sorting storage section 150 _TGT . By inserting it into the hollow portion 53 of the body 5 _TGT , the parent die mounting body 5 _TGT to be loaded can be held at the tip 811 of the loading rod 81 . As a result, the loading target parent die mounting body 5 _TGT held by the tip end 811 of the loading rod 81 inserted into the loading target sorting storage section 150 _TGT from the rod insertion port 106 can be easily forwarded by the loading rod 81. . The loading target parent die mounting body 5 _TGT is coaxially held by the loading rod 81 .

FIG. 16 is a diagram for explaining the state of the detonating explosive loading process. In this embodiment, the discharge port 107 formed in the lower region of the front face 101 of each sorting container 150 is formed to face the rod insertion port 106 formed in the lower region of the rear face 102 side. Therefore, in the detonating explosive loading step, the loading rod 81 holding the loading target parent die mounting body 5 _TGT is further forwarded along the detonating explosive loading direction X, thereby making the loading target sorting and accommodating part 150 _TGT . The parent die mounting body 5 _TGT to be loaded in the lowest stage (first stage) can be discharged from the discharge port 107 . In addition, the extending direction in the front-rear direction of each sorting accommodation portion 150 of the parent die accommodation unit 100 is parallel to the loading direction X of the detonating explosive and the direction of the central axis C1 of the loading rod 81 . Therefore, by feeding the loading rod 81 forward along the loading direction X of the detonating explosive, the loading target parent die mounting body 5 _TGT held by the loading rod 81 is moved along the front-rear direction of each sorting container 150, It can be discharged smoothly from the discharge port 107 . In addition, on the front surface 101 of each sorting container 150, a stopping plate 160 is provided to prevent the mother die mounted bodies 5 positioned in the second to uppermost stages in each sorting container 150 from being ejected from the front surface 101 side. is provided, when the loading rod 81 advances the parent die mounting body 5 _TGT to be loaded at the bottom stage, the parent die mounting body 5 TGT to be loaded may cause friction with the parent die mounting body 5 _TGT to be loaded. It is possible to prevent the mounting body 5 from being ejected from the front surface 101 side.

Further, in the above-described rod alignment step, the loading rod 81 is aligned so that the center axis C1 of the loading rod 81 is coaxial with the center axis C2 of the blast hole 3 _TGT to be loaded. Therefore, in the detonating explosive loading step, the loading rod 81 holding the loading target parent die mounting body 5 _TGT is fed forward along the detonating explosive loading direction X, thereby loading the loading target parent die mounting body 5 _TGT . It can be smoothly inserted into the loading target blasting hole 3 _TGT from the tip portion 5A side.

By the way, in the above rod alignment process, the center axis C1 of the loading rod 81 is aligned so as to be coaxial with the center axis C2 of the blasting hole 3 _TGT to be loaded. It is also assumed that there is an alignment error in . 17A and 17B are diagrams for explaining the guide function of the conical guide portion 52 in the parent die mounting body 5. FIG. FIG. 17 shows a situation in which the initiation explosive loading step is performed under a situation where the central axis C1 of the charging rod 81 is eccentric with respect to the central axis C2 of the blast hole 3 _TGT to be charged. 17, illustration of the loading rod feeding mechanism 80 and the parent die housing unit 100 is omitted.

The parent die mounting body 5 in this embodiment is provided with the conical guide portion 52 at the front end 51A of the tubular holder 51, and the conical guide portion 52 has a conical shape as described above. Therefore, even if the loading rod 81 is fed forward in a state in which the loading rod 81 is eccentric with respect to the blast hole 3 _TGT to be loaded, the opening of the blast hole 3 _TGT to be loaded is removed during the process of loading the detonating explosive. The side surface of the conical guide portion 52 that collides with the edge of 3B (edge 2A on the face surface) is brought into sliding contact with the hole opening 3B (edge 2A), and the main die mounting body 5 is pushed into the blasting hole 3 _TGT to be loaded. You can progress inside. In other words, the amount of eccentricity between the central axis C1 of the loading rod 81 and the central axis C2 of the blast hole 3 _TGT to be loaded, which was eccentric at the rod alignment completion position, is reduced by the guide function of the conical guide portion 52, and the parent die The mounting body 5 can be smoothly inserted into the loading target blasting hole 3 _TGT . In addition, in the process of forward feeding the parent die mounting body 5 _TGT to be loaded to the deepest part 3A of the blast hole 3 _TGT to be loaded, an obstacle 3C such as falling rocks is caused by hole roughening in the blast hole 3 _TGT to be loaded. Even if there is, the parent die mounting body 5 can be advanced toward the innermost portion 3A while the side surface of the conical guide portion 52 is brought into sliding contact with the obstacle 3C.

Further, as shown in FIG. 16, in the step of loading the detonating explosive in this embodiment, the leg wire 42 connected to the stepped detonator 41 in the loading target parent die mounting body 5 _TGT (mother die mounting body 5) is attached to a binding material. 43 may be inserted into the target blast hole 3 _TGT (blast hole 3). In this case, the diameter of the loop portion 42A formed by bundling the leg wires 42 into a loop with the binding material 43 is set to be larger than the diameter of the hole mouth 3B of the blast hole 3. As shown in FIG. Then, in the process of inserting the loading target parent die mounting body 5 _TGT (mother die mounting body 5) into the loading target blasting hole 3 _TGT (blasting hole 3), the ring-shaped portion 42A for bundling the leg wires 42 is formed around the hole opening 3B. , and the binding material 43 is broken by the resistance. As a result, the binding of the leg wire 42 with the binding material 43 can be automatically untied. Here, since the binding material 43 is made of an easily breakable material such as paper, it can be easily broken with a small force. Therefore, it is possible to suppress a large load from being applied to the leg wire 42 in the process of untying the leg wire 42 during the process of loading the detonating explosive.

Further, as a method of automatically untying the leg wires 42 in the loading target parent die mounting body 5 _TGT (parent die mounting body 5) during the process of loading the detonating explosive, the following alternative embodiment may be adopted. For example, one or a plurality of leg wire holding rod members for hooking and holding the ring-shaped portion 42A of the leg wire 42 of each parent die mounting body 5 may be provided at appropriate locations on the outer surface of the parent die housing unit 100 in this embodiment. good too. Such a leg wire holding rod member may be provided, for example, on the side surface 103 of the parent die housing unit 100 (the outer surface of the side wall 120). From the viewpoint of orderly holding the ring-shaped portions 42A of the leg wires 42 in each parent die mounting body 5 by the leg wire holding rod members, the parent die housing unit 100 preferably includes a plurality of holding rod members 42A.

Also, for example, the parent die housing unit 100 preferably has one or more leg wire holding rod members on each of the left and right side surfaces 103 . When the parent die mounting body 5 _TGT to be loaded held by the loading rod 81 is advanced in the process of loading the detonating explosive, stress is applied to the binding material 43 that binds the ring-shaped portion 42A held by the leg wire holding rod member in the process. The binding material 43 can be broken by the stress. Of course, since the binding material 43 is made of an easily breakable material such as paper, a large stress is not applied to the wire 42 before the binding material 43 breaks. Also in this mode, the loop portion 42A is held by the leg wire holding rod member in advance, and the binding of the leg wire 42 with the binding material 43 can be automatically unbound during the process of loading the detonating explosive. . The leg wires 42 unbound by the binding material 43 can then be fed out sequentially from the leg wire holding rod member as the loading rod 81 is advanced forward.

When the leg wire holding rod member is provided on the side surface 103 of the parent die housing unit 100, the leg wire holding rod member may protrude from the side surface 103 toward the side. Further, when a plurality of leg wire holding rod members are provided on the side surface 103 of the parent die housing unit 100, the plurality of leg wire holding rod members may be arranged in the vertical direction of the parent die housing unit 100 at different levels. By installing a plurality of leg wire holding rod members in different levels, the leg wires 42 held by the respective leg wire holding rod members are less likely to get entangled with each other.

Further, in the above-described explosive charge loading step, the control device 15 calculates the forward feeding amount of the loading rod 81 and drives the loading rod feeding mechanism 80 based on the calculated forward feeding amount of the loading rod 81 . The forward feed amount of the loading rod 81 can be calculated, for example, based on the initial distance between the rod hole openings and the design length of the blast hole 3 _TGT to be loaded when the loading rod 81 is arranged at the rod alignment completion position. In addition, the control device 15 controls the first coordinate P1 (X1, Y1, Z1) of the hole opening _3B and the second coordinate P2 (X2 , Y2, Z2), and based on the initial distance between the rod holes, the innermost part 3A of the blast hole 3 _TGT to be loaded is the parent die mounting body 5 _TGT to be _loaded . A forward feed amount of the loading rod 81 required to position the tip portion 5A may be calculated. As a result of the automatic control of the loading _rod _feeding mechanism 80 by the control device 15 in this way, as shown in FIG. When 5A is positioned, the loading of the parent die mounting body 5 _TGT to be loaded is completed.

After the initiation explosive loading step, the control device 15 controls the loading rod feeding mechanism 80 to retract the loading rod 81 while operating the additional explosive supply device 83 to increase the amount through the pressure feeding hose 82 in step S4. The die 6 (additional explosive) is pumped and supplied to the hollow passage 812 of the loading rod 81 (additional explosive loading step). The additional die 6 pressure-fed into the hollow passage 812 of the loading rod 81 is loaded from the tip 811 of the loading rod 81 (hollow passage 812) into the blasting hole 3 _TGT to be loaded. FIG. 19 shows the completion of the additional explosive loading process. When the additional explosive loading step is completed, the loading of the parent die 4 (parent die mounting body 5) and the additional die 6 inside the target blasting hole 3 _TGT is completed. Then, as shown in FIG. 19, in a state in which the loading rod 81 is pulled out from the blasting hole 3 _TGT to be loaded, the explosives (the main die 4 and the additional die 6) are automatically loaded into the next blasting hole 3 _TGT to be loaded. control is performed. That is, the steps S2 to S4 described above are sequentially repeated, and all the blast holes 3 can be automatically charged with explosives (the main die 4 and the additional die 6).

As described above, according to the explosive loading system S including the explosive loading device 1 and the control device 15, explosives corresponding to the number of stages of the blasting target areas assigned to the face surface 2 of the tunnel TN are automatically delivered to the blast holes 3. It can be loaded.

According to the explosive loading method of the present embodiment, the main die mounting body 5 having the main die 4 mounted thereon is provided with the conical guide portion 52 at the front end 51A of the cylindrical holding body 51. As described with reference to FIG. 17, under the condition that the central axis of the parent die mounting body 5 is eccentric with respect to the central axis C2 of the blasting hole 3, or due to hole roughening in the blasting hole 3, falling rocks may occur. Even if there is an obstacle 3C such as the blasting hole 3, the guide function of the conical guide portion 52 allows the main die mounting body 5 to be smoothly loaded to the innermost portion 3A of the blast hole 3.

In the above embodiment, an embodiment in which the blasting hole 3 drilled in the face surface 2 is fully automatically loaded with explosives (the main die 4 and the additional die 6) has been described as an example. The explosive loading method using the parent die mounting body 5 having the guide portion 52 is not limited to the above-described form. For example, when aligning the loading rod 81 in the rod alignment process described above, the loading rod 81 faces the blast hole 3 not by automatic control using the control device 15 but by operation via the operation panel 232 or the like. The loading rod 81 may be aligned so that it is positioned. Even in such an aspect, the explosive loading method according to the present disclosure, in which the parent die mounting body 5 held at the tip 811 of the loading rod 81 is loaded into the blast hole 3, can be suitably applied, realizing smooth explosive loading. can do.

Reference Signs List 1... Explosive loading device 2... Face surface 3... Blasting hole 4... Parent die 5... Parent die mounting body 6... Additional die 10... Drill jumbo 13... Explosive Loading boom 20 Guide cell 70 Parent die supply device 80 Loading rod feed mechanism 81 Loading rod 83 Additional explosive supply device 90 Parent die housing unit drive mechanism 100... Parent die accommodation unit 140... Partition wall 150... Sorting accommodation unit

Claims

An explosive loading method that is applied to a tunnel blasting method and loads a detonating explosive into a blast hole drilled in a face surface,
By inserting the tip of a loading rod into the hollow portion of a detonating explosive mounting body in which the detonating explosive is mounted so that the hollow portion remains inside the rear end of the cylindrical holder, the detonating explosive is loaded by the loading rod. holding the mounting body;
a detonating explosive loading step of loading the detonating explosive mounting body held at the tip of the loading rod into the blast hole;
including
A conical guide portion tapering toward the tip of the detonating explosive mount is provided at the front end of the cylindrical holder in the detonating explosive mount,
explosive loading method.
A binding material is used so that a leg line extending from the detonator of the detonating explosive mounted on the detonating explosive mounting body is formed with a ring-shaped portion having a diameter larger than the diameter of the blasting hole in the middle of the leg wire. and conclude with
In the process of loading the detonating explosive mounting body into the blast hole in the detonating explosive loading step, when the ring-shaped portion of the leg line comes into contact with the edge around the mouth of the blast hole on the face surface untying the binding material by resistance;
2. The explosive loading method of claim 1.
A detonating explosive mounting body applied to a tunnel blasting method and loaded into a blasting hole drilled in a face surface,
a cylindrical holder;
a detonating explosive mounted inside the cylindrical holder;
a hollow portion formed inside the rear end of the cylindrical holder;
a conical guide portion provided at the front end portion of the cylindrical holder and having a tapered shape toward the tip;
A detonating explosive loading body comprising a