JP2002039700A - Charging tool and charging method for explosive compound into gunpowder charging hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging tool and a charging method for an explosive compound into a gunpowder charging hole wherein a container is easily cut with the aid of gravity, charging density of gunpowder in the gunpowder charg ing hole is improved, charging work of gunpowder into the gunpowder charging hole is effectively achieved, and the need of a large sized apparatus is eliminated to reduce the cost. SOLUTION: A cylindrical container 12 constituting a charging tool 11 is cylindrical, on which outer peripheral surface a stopper flange 15 is protruded, which flange is engaged with an inlet of a gunpowder charging hole 14. A plurality of cutting blades 17 are provided on a bottom of the cylindrical container 12 directed upward in their blade parts 17a. A blade structure 17b of each cutting blade 17 extends from a peripheral wall 12a to the center of the container to have a space part 18 at the center. Once a tube 19 in which fluid explosive compound 13 is filled is introduced into the cylindrical container 12, the tube 19 is cut with the cutting blade 17, and hence the explosive compound 13 in the tube 19 is charged into the gunpowder charging hole 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig and a method for loading an explosive into a charge hole used in a blasting operation, for example, for breaking rock.

[0002]

2. Description of the Related Art Conventionally, when charging an explosive into a charge hole drilled in a bedrock, a tube or a paper tube filled with a solid or clay-like explosive is directly supplied to a large number of charge holes as required. Or it was loaded by machine. In the case of loading by a machine, the tube (container) is accommodated in the explosive hopper, and the tip of a guide passage (loading hose) through which the tube is guided and conveyed is set at the entrance of a charge hole extending in the horizontal direction. You. In this state, the tube is conveyed at a high speed in the guide passage by air pressure and is loaded into the charging hole. Further, a cutter for cutting the tube is provided at the end of the guide passage, and the tube is pressurized at a high pressure, conveyed, and cut by the cutter.

[0003]

However, according to the conventional explosive loading method, since the tube or paper tube filled with the explosive is loaded into the charging hole as it is, each of the charged explosives is charged into the charging hole. There has been a problem that gaps are formed between the tubes or the paper cylinders, and the charge density of the explosive in the charge hole is low. Therefore, in order to obtain the required amount of explosive, a tube or a paper cylinder filled with the explosive was forced into the charge hole, or the number of charge holes for loading the explosive had to be increased. Therefore, there is a problem in that the efficiency of the operation of loading the explosive into the charging hole is low, the operation time is prolonged, and the cost is increased.

Further, when a cutter is provided at the tip of the guide passage, a large force is required to transport and cut the tube in the guide passage extending horizontally.
Therefore, there is a problem that a large-scale device must be provided.

The present invention has been made by focusing on the problems existing in the prior art as described above. The purpose is to easily cut the container using gravity, increase the charge density of the explosive in the charge hole, and improve the efficiency of loading the explosive into the charge hole. An object of the present invention is to provide a jig and a method for loading an explosive into a charging hole, which can be performed well and can reduce the cost without requiring a large-scale device.

[0006]

According to a first aspect of the present invention, there is provided a jig for loading explosives into a charging hole according to the first aspect of the present invention, which is supported at an inlet of a vertically extending charging hole. A cylindrical container for accommodating a container filled with explosives, and a lower end side of the cylindrical container provided with a blade portion facing upward, and cutting the container to mount the explosive in the container. And a cutting blade for loading the medicine hole.

According to a second aspect of the present invention, there is provided a jig for charging an explosive into a charging hole according to the first aspect of the present invention, wherein a plurality of the cutting blades are provided, and each cutting blade has a cylindrical body. The container extends from the peripheral wall of the container toward the center and has a space at the center.

According to a third aspect of the present invention, there is provided a jig for loading an explosive into the charging hole according to the second aspect, wherein the housing is a flexible tube, and the cutting blade is a blade. Is inclined so as to be located downward from the peripheral wall of the cylindrical container toward the center.

According to a fourth aspect of the present invention, there is provided a jig for charging an explosive into the charging hole according to the second aspect, wherein the housing is a rigid cylindrical body, and the cutting blade is a blade. Are inclined so as to be located upward from the peripheral wall of the cylindrical container toward the center.

According to a fifth aspect of the present invention, there is provided a jig for charging an explosive into the charging hole according to any one of the first to fourth aspects, wherein the explosive has a viscosity of 10,000 cP or less. It is an explosive.

According to a sixth aspect of the present invention, there is provided a method for loading an explosive into a charge hole according to the first aspect of the present invention, wherein the jig for loading an explosive into the charge hole is provided at an entrance of the charge hole extending vertically. Supporting, charging a container filled with an explosive into a cylindrical container, cutting a part of the container with a cutting blade, and loading the explosive in the container into a charging hole. is there.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3
As shown in FIG. 2, a cylindrical container 12 constituting a jig 11 for loading an explosive has a cylindrical shape, and an outer peripheral surface on an upper end side thereof is locked at an inlet of a charge hole 14 for loading a flowable explosive 13. A locking flange 15 is protruded. The charging hole 14 is, for example, the bedrock 1
6 at predetermined intervals in a vertical direction at predetermined intervals. In the present specification, the vertically extending charging hole 14 means a hole extending in the vertical direction in a range of 45 degrees to 90 degrees, preferably in a range of 60 degrees to 90 degrees with respect to the horizontal direction. In this embodiment, the charging hole 14 extends 90 degrees with respect to the horizontal direction, that is, the vertical direction. Therefore, the tube 19 can be cut using gravity.

At the bottom of the cylindrical container 12, four cutting blades 17 are provided.
Extend toward the center from the peripheral wall 12a of the cylindrical container 12 at intervals of 90 degrees, and protrude so as to form a space 18 at the center of the cylindrical container 12. The blade portion 17a of the cutting blade 17 is located lower as it goes from the peripheral wall 12a of the cylindrical container 12 toward the center, that is, the blade body 17b becomes narrower as it goes from the peripheral wall 12a of the cylindrical container 12 to the center. At an angle (inwardly inclined).

The cutting blade 17 is connected to the bottom of the cylindrical container 12 by a connecting portion (not shown), and is configured to be detachable. The blade portion 17a can be re-sharpened or replaced. Further, since the space 18 is provided between the distal ends of the cutting blades 17, the explosive 13 described later is used.
Even if both ends of the tube 19 as a container filled with are fixed with metal clips such as aluminum, it is possible to avoid that portion hitting the blade portion 17a of the cutting blade 17.

The fluid explosive 13 is filled in a tube 19 made of polyethylene, and both ends thereof are sealed with metal clips (not shown). Both ends of the tube 19 may be stopped by folding, heat sealing, adhesive bonding, or the like. The explosive 13 is preferably a flowable explosive, and for example, a solid (powder) explosive such as an ammonium nitrate explosive (ANFO explosive, powder explosive) or a mud or clay explosive such as a slurry explosive or an emulsion explosive. The viscosity of the fluid explosive 13 is preferably 10,000 cP (centipoise) or less, more preferably 2000 cP or less,
Particularly preferably, it is 600 to 1200 cP.

By setting the viscosity as described above, the flowable explosive 13 can be densely loaded into the charging hole 14 without any gap. If the viscosity exceeds 10,000 cP, it becomes difficult to increase the loading density of the flowable explosive 13 in the charging hole 14. Further, as shown in FIG.
Reference numeral 0 has a columnar gripping portion 20b at the base end of the support rod 20a, and a disk-shaped pressing plate 20c at the distal end. Then, by gripping the grip portion 20b and pressing the upper end of the tube 19 with the pressing plate 20c, the tube 19
Is pressed against a cutting blade 17 to cut the tube 19 and discharge the fluid explosive 13.

Next, a method of loading the flowable explosive 13 into the charging hole 14 will be described. A predetermined number of charging holes 14 are formed in the bedrock 16 at predetermined intervals. The loading jig 11 is sequentially attached to each of the charging holes 14, and a required amount of the flowable explosive 13 is loaded into the charging hole 14. In this case, first, as shown in FIG.
Then, the cylindrical container 12 of the loading jig 11 is inserted, and its locking flange 15 is locked at the entrance of the charging hole 14. In this state, the tube 19 filled with the flowable explosive 13 is dropped from the upper end of the cylindrical container 12 into the inside. At this time, as shown in FIG. 4, since the blade portion 17a of the cutting blade 17 is inclined inward so as to be located downward from the peripheral wall 12a of the cylindrical container 12 toward the center, the lower end of the tube 19 is It can be automatically guided to the center side of the container 12.

Subsequently, when the grip portion 20b of the pressing member 20 is gripped and the upper end of the tube 19 is pressed by the pressing plate 20c, the lower end of the tube 19 is pressed against the cutting blade 17 and cut. For this reason, the flowable explosive 13 is discharged from the cut portion of the tube 19 into the charging hole 14, and the charging hole 1 is discharged.
4 is deposited at the bottom. Next, another tube 19 is dropped into the cylindrical container 12, and the same operation is performed. further,
The same operation is repeated a plurality of times to load the required amount of the flowable explosive 13 into one charging hole 14. This fluid explosive 13
Place the parent dynamite with an electric detonator on top. In this manner, the required amount of the flowable explosive 13 is also loaded into the other charging holes 14, and the parent dynamite is placed thereon. Thereafter, the parent dynamite is ignited and blasted.

The effects exerted by the above embodiment will be described below. According to the loading jig 11 described in the embodiment, the tube 19 can be easily cut using gravity. Further, the tube 19 can be cut by the blade portion 17a of the cutting blade 17, and only the fluid explosive 13 therein can be loaded into the charging hole 14. Since the explosive 13 has fluidity, it is densely deposited in the charging hole 14. For this reason, the charge density of the explosive 13 in the charging hole 14 can be increased, and the required number of the charging holes 14 can be reduced. Moreover, a large-scale apparatus for transporting and cutting the tube with high-pressure air in a hose extending in the horizontal direction as in the related art is not required. Therefore, the operation of piercing the charging hole 14 and the operation of loading the explosive 13 into the charging hole 14 can be efficiently performed in a short time. As a result, the cost involved in loading the explosive 13 into the charging hole 14 can be reduced.

The blade body 17 of each of the plurality of cutting blades 17 extends from the peripheral wall 12a of the cylindrical container 12 toward the center, and has a space portion 18 at the center of the cylindrical container 12, so that the fluidity is improved. A metal clip or the like for stopping both ends of the tube 19 filled with the explosive 13 can be prevented from hitting the cutting blade 17.

The cutting blade 17 can easily cut the flexible polyethylene tube 19 by moving it toward the center of the tubular container 12 because the blade portion 17a is inclined inward.

According to the method of loading the explosive 13 into the charging hole 14, the operation of loading the explosive 13 can be performed by a simple operation using the above-described loading jig 11.
1 can reliably exhibit the above-mentioned effects.

[0023]

The above embodiment will be described more specifically with reference to examples and comparative examples. (Comparative Example 1) A rock was drilled to form a charging hole having a diameter of 75 mm and a depth of 8.1 m, and the distance between the charging holes was set to 2.5 m. The explosive used was an emulsion explosive, which was placed in a polyethylene tube with a diameter of 50 mm.
g. The charge amount of the explosive in the charge hole is 12.0
kg (including 0.5 kg of parent dynamite).

Then, 23 charged with the emulsion explosive is used.
Put the tubes into the charging hole and reduce the charging amount to 11.5k
g. Thereafter, a parent dynamite (emulsion explosive having a diameter of 50 mm and 0.5 kg) to which an electric detonator was attached was set so as to be in contact with the upper surface of the explosive which had already been filled, and was filled up to the mouth of the charging hole. At this time, the length in which the explosive was loaded in the charging hole, that is, the charging length was 5.4 m including the parent dynamite. Emulsion explosives were similarly loaded into other charging holes so as to have a predetermined amount of explosives. Thereafter, the parent dynamite was ignited and blasted.

(Example 1) Drilling a bedrock to make a diameter of 75 m
m, a charging hole having a depth of 8.2 m was formed, and the distance between the charging holes was set to 3.0 m. The explosive used was an emulsion explosive, and 500 g was packaged in a polyethylene tube having a diameter of 50 mm. The charge amount of the explosive into the charge hole was 18.5 kg (including 0.5 kg of parent dynamite).

On the other hand, the loading jig according to the above-described embodiment is the same as that of the above-described embodiment.
The length of the cutting blades 17 is 67 mm, the interval between the tip portions of the four cutting blades 17 is 10 mm, and the space between them is a space 18. The loading jig 11 was set in the charging hole 14. Then, the tube 19 filled with the emulsion explosive 13 was put into the cylindrical container 12 of the loading jig 11.

Then, the bottom of the tube 19 is placed on the cutting blade 17.
A cut is made by being pressed against the blade portion 17a, and the explosive 13 drops from the cut. The dropped explosive 13 reached the bottom of the charging hole 14 and was charged into the charging hole 14 without any gap. Similarly, 36 tubes are connected to the cylindrical container 12 in the same manner.
And the amount of explosive in the charging hole 14 was set to 18 kg.
After the charging of the explosive 13 is completed, the charging jig 11 is inserted through the charging hole 14.
Was removed.

Thereafter, a parent dynamite equipped with an electric detonator (emulsion explosive having a diameter of 50 mm and a weight of 0.5 kg)
Was set so as to be in contact with the upper surface of the explosive which had already been filled, and a filling was made up to the mouth of the charging hole 14. At this time, the charging hole 14
The length in which the explosive 13 was loaded, that is, the charge length was 4.3 m including the parent dynamite. Other charging holes 1
Similarly, the emulsion explosive 13 was loaded so as to have a predetermined amount. Thereafter, the parent dynamite was ignited and blasted.

As a result, in Example 1, compared with Comparative Example 1,
The emulsion explosive 13 in the charging hole 14 can be densely loaded.
4, the charge length could be shortened. Therefore,
When the rock 16 having the same volume is blasted, blasting can be performed with a smaller number of piercings, the piercing time can be shortened, the cost of heavy piercing equipment can be reduced, and the total blasting cost can be reduced.

Incidentally, the configuration of the above embodiment may be modified and embodied as follows. -As shown in FIG. 5A, the number of the cutting blades 17 is three,
Each of the cylindrical containers 12 may be arranged at equal intervals from the peripheral wall 12a toward the center, and the space 18 may be formed at the center. As shown in FIG.
The number of the cutting blades 17 is two, and the peripheral wall 1 of the cylindrical container 12 is
It may be arranged so as to face each other from the center 2a toward the center, and to form the space 18 at the center.
As shown in FIG. 5C, the extending direction of each cutting blade 17 in the form of FIG. 5B may be shifted in the opposite direction. As shown in FIG. 5D, the number of the cutting blades 17 may be one, and the cutting blades 17 may be provided between the peripheral walls 12 a so as to pass through the center of the cylindrical container 12.

As shown in FIG. 6A, the cutting blade 17
The blade portion 17a may be configured to be inclined (outwardly inclined) so as to be located upward from the peripheral wall 12a of the cylindrical container 12 toward the center, contrary to the embodiment. In the case where the blade portion 17a is inclined outward, a stress to open is applied to a packaging material such as a paper tube which is difficult to cut as a container, so that the container can be easily cut. Alternatively, as shown in FIG. 6B, the cylindrical container 12 may be configured horizontally so as to be located in a plane perpendicular to the axis. When the blade portion 17a is horizontal, the production is easy and the production cost can be reduced. Furthermore, only the portion near the center of the cylindrical container 12 may be configured to be inclined inward or outward.

As shown in FIG. 7A, the cutting blade 17
Is installed between the peripheral walls 12a of the cylindrical container 12, and the blade portion 12
a may be configured to be inclined (inwardly inclined) so as to be located lower as it goes from the peripheral wall 12a of the cylindrical container 12 toward the center. Further, as shown in FIG. 7B, a cutting blade 17 is provided between the peripheral walls 12a of the cylindrical container 12 so that the blade portion 17a is positioned upward from the peripheral wall 12a of the cylindrical container 12 toward the center. May be configured to be inclined (outwardly inclined). Further, as shown in FIG. 7C, the cutting blade 17 may be provided between the peripheral walls 12 a of the cylindrical container 12 and may be horizontally arranged so as to be located in a plane orthogonal to the axis of the cylindrical container 12. Good.

The cutting blade 17 may be formed in an annular shape in one row or a plurality of rows, or in an arc shape. In these cases, a support member for supporting the cutting blade 17 on the peripheral wall 12a of the cylindrical container 12 is required.

In the embodiment, the tube 19 is pressed by using the pressing member 20, but the pressing member 20 may be omitted. In this case, by dropping the tube 19 into the cylindrical container 12, the tube 19 can be cut by the cutting blade 17 with the momentum.

The cylindrical container 12 may be formed in a rectangular cylindrical shape such as a square cylindrical shape, an octagonal cylindrical shape, or an elliptical cylindrical shape. Further, the diameter of the inverted conical cylinder increases as it goes upward, and the charging hole 1
4 may be configured to be locked at the entrance.

The material of the tube 19 may be polypropylene resin, nylon resin or the like. The position of the cutting blade 17 with respect to the cylindrical container 12 may be set slightly above the lower end of the cylindrical container 12.

The locking flange 15 may be provided partially or intermittently on the outer peripheral surface of the cylindrical container 12. In addition, a technical idea grasped from the embodiment will be described below. The device according to any one of claims 1 to 5, further comprising a pressing member for pressing the housing against the cutting blade to cut the housing in a state where the housing is housed in the cylindrical container. A jig for loading explosives into a hole. When configured in this manner, in addition to the effects of the invention according to any one of claims 1 to 5, the container containing the fluid explosive is pressed against the cutting blade by the pressing member, so that the container is pressed. Can be easily cut.

The charging hole according to any one of claims 1 to 5, wherein a locking flange which is locked at an entrance of the charging hole is provided on an outer peripheral surface of the cylindrical container. Jig for loading explosives. With this configuration, in addition to the effects of the invention described in any one of the first to fourth aspects, the loading jig can be easily locked at the entrance of the charging hole.

[0039]

As described above, according to the present invention, the following effects can be obtained. According to the jig for charging an explosive into the charging hole according to the first aspect of the present invention, the container can be easily cut using gravity, and the charging density of the explosive in the charging hole can be reduced. The explosive can be efficiently loaded into the charging hole, and the cost can be reduced without requiring a large-scale device.

According to the jig for loading explosive into the charging hole according to the second aspect of the invention, in addition to the effect of the first aspect, the blade body of each of the plurality of cutting blades is a cylindrical container. Since it extends from the peripheral wall toward the center and has a space at the center of the cylindrical container, it is possible to prevent metal clips or the like that stops both ends of the container filled with the flowable explosive from hitting the cutting blade. Can be.

According to the jig for loading explosives into the charging hole according to the third aspect of the present invention, in addition to the effect of the second aspect, the cutting blade has a blade portion extending from the peripheral wall of the cylindrical container. Since it inclines so that it may be located outside as it goes to the center, a flexible tube can be easily cut by approaching the center of the cylindrical container.

According to the jig for charging explosive into the charging hole according to the fourth aspect of the present invention, in addition to the effect of the second aspect, the cutting blade has a blade portion extending from the peripheral wall of the cylindrical container. Since it is inclined so as to be located inward toward the center, it can be easily cut by applying a stress so as to cut open a rigid cylinder.

According to the jig for loading explosive into the charging hole according to the fifth aspect of the present invention, in addition to the effect of the invention according to any one of the first to fourth aspects, the jig for charging the explosive in the charging hole is also provided. The loading density of the flowable explosive can be reliably increased.

According to the method of loading an explosive into the charging hole according to the sixth aspect of the invention, the effect of the first aspect of the invention can be reliably exerted by a simple operation.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an explosive loading jig according to an embodiment.

FIG. 2 is a plan view showing a support structure of a cutting blade for a cylindrical container.

FIG. 3 is a cross-sectional view showing a support configuration of a cutting blade for a cylindrical container.

FIG. 4 is a sectional view showing the operation of a jig for loading an explosive.

FIGS. 5A to 5D are plan views showing another example of a configuration for supporting a cutting blade with respect to a cylindrical container.

FIGS. 6A and 6B are cross-sectional views showing another example of a support structure of a cutting blade for a cylindrical container.

FIGS. 7A to 7C are cross-sectional views showing another example of a support structure of a cutting blade for a cylindrical container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Loading jig, 12 ... Cylindrical container, 13 ... Fluid explosive, 14 ... Charge hole, 17 ... Cutting blade, 17a ... Blade part, 18
... space, 19 ... tube as container.

Claims (6)

[Claims] A cylindrical container supported by an inlet of a vertically extending charging hole and accommodating a container filled with an explosive;
A blade is provided at the lower end side of the cylindrical container so as to face upward, and a cutting blade for cutting the container and loading the explosive in the container into the charging hole is provided. Jig for loading explosives. 2. The cutting blade according to claim 1, wherein a plurality of the cutting blades are provided, and a blade body of each cutting blade extends from the peripheral wall of the cylindrical container toward the center and has a space at the center. A jig for loading explosives into the charging holes. 3. The container according to claim 2, wherein the container is a flexible tube, and the cutting blade is inclined so that the blade portion is located lower as it goes from the peripheral wall of the cylindrical container toward the center. A jig for loading an explosive into the charging hole described in the above. 4. The container is a rigid cylinder,
3. The cutting blade is configured to be inclined so that the blade portion is located upward as it goes from the peripheral wall of the cylindrical container toward the center.
7. A jig for charging an explosive into a charging hole according to item 1. 5. The jig for loading an explosive into a charging hole according to claim 1, wherein the explosive is a flowable explosive having a viscosity of 10,000 cP or less. 6. A jig for charging an explosive into the charge hole according to claim 1 is supported at an inlet of the charge hole extending in a vertical direction, and a container filled with the explosive is charged into a cylindrical container. A method for loading explosives into a charging hole, characterized in that a part of the container is cut with a cutting blade and the explosive in the container is loaded into the charging hole.