JPS6314239Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to an explosives loading bag used when setting explosives to blast rocks, etc. in rocky mountains, mines, etc.

Conventional technology Conventionally, in order to blast a rocky mountain, etc., small particles of anho (ammonium nitrate, oil explosive) were loaded directly or through a bag, or multiple sticks of dynamite were loaded into a blast hole made in the rocky mountain. I'm going there. Among these, Anho is now very commonly used because it is cheap, but since the diameter of the blast hole (previously, it was often 35 to 40 mm) is uniform from top to bottom, There was a problem that the lower part had less free surface than the previous one, so it could not be blasted completely and remained.

In addition, recent advances in drilling technology have made it possible to obtain blast holes with a diameter of 75 to 100 mm, but when such a blast hole is tightly loaded with ancho, the surrounding rock at the bottom of the blast hole is not sufficiently blasted. However, the rock around the upper part of the blast hole could be scattered too much, creating a dangerous situation.

When using dynamite, the above-mentioned problem during blasting does not occur by taking into consideration the loading interval and number of loads into the borehole, but dynamite is expensive and requires a loading technique. The current demand is to replace it with an explosive that does not require blasting technology.

Purpose This idea was made to solve the problems in conventional blasting as mentioned above, and its purpose is to ensure that the rock around the bottom of the blast hole made in the rocky mountain etc. does not remain. A new explosive charge that not only allows blasting to be completed safely without scattering too much rock around the hole, but also enables effective use of explosives such as Anho without wasting them. The goal is to provide bags for use.

Embodiment An embodiment embodying this invention will be described below with reference to the drawings. In the drawings, 1 indicates the exposed surface of a rocky mountain, and 2 indicates the rock to be blasted next.
3 is a blast hole drilled inward from the exposed surface 1 of the rock 2, the diameter of which is 100 mm, and the height of the pliers approximately 10 mm.

Reference numeral 4 denotes an explosive loading bag inserted into the blast hole 3, which is made of a flexible polymeric material such as polyethylene and has a length of about 10 m. Reference numeral 5 denotes a large diameter part that forms the lower part of the explosive loading bag 4 and fits into the blasting hole 3 almost without any gaps.The lower part of the explosive loading bag 4 has an appropriate length depending on the amount and vertical distribution of the rocks 2. It has come to occupy a large part of the country. Reference numeral 6 denotes a small diameter portion of the explosive loading bag 4 other than the large diameter portion 5, having an inner diameter of 30 to 75 mm, and is formed so as to be continuous with the large diameter portion 5.

Reference numeral 7 indicates a granular or powdered explosive such as anho loaded into the explosive loading bag 4.

According to the embodiment configured as described above, since a sufficient amount of explosives 7 is loaded into the large diameter portion 5, a strong explosive force is generated in the large diameter portion 5, and the rock 2 with few free surfaces is
The lower part will definitely be blasted. In addition, since the small diameter part 6 is loaded with an appropriate amount of explosives 7, which is smaller than the large diameter part 5, an appropriate explosive force is generated in the small diameter part 6, and the rocks 2 located around it are not scattered too much. Blasts safely and reliably.

Moreover, not only can the explosive 7 be used effectively without wasting it, but since the explosive 7 is loaded into the explosive loading bag 4, it does not become damp due to moisture leaking into the blast hole 3.

Note that this invention is not limited to the structure of the embodiment described above, and may be embodied by, for example, forming the explosive loading bag from cloth or other various materials, or by changing its dimensions.

As detailed above, this invention is an explosive loading bag that is inserted into a blast hole provided in a rocky mountain, etc., and is used to load granular or powdered explosives inside, and the bag fits inside the blast hole 3 with almost no gaps. By providing a large diameter part 5 with a large inner diameter at the bottom and configuring the part other than the large diameter part 5 with a small diameter part 6 with a smaller inner diameter, rocks around the lower part of a blast hole made in a rocky mountain etc. can remain. Not only can blasting be carried out reliably without causing too much scattering of the surrounding rocks, but also the blasting work can be completed safely without causing too much scattering. It has a great effect.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of this invention. 3...Blast hole, 5...Large diameter section, 6...Small diameter section.

Claims (1)

[Scope of utility model registration request] In an explosive loading bag for inserting into a blasting hole provided in a rocky mountain etc. and loading granular or powdered explosives inside, a large diameter part 5 having a large inner diameter that can fit into the blasting hole 3 almost without any gaps is placed at the bottom. A bag for loading explosives, characterized in that a part other than the large diameter part 5 is constructed with a small diameter part 6 having a smaller inner diameter.