JPS6352943B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for destroying rocks, concorite, etc. using carbon dioxide.

<Prior Art> Excavation machines and explosives have conventionally been used to destroy rocks, concrete, etc. in mining coal and other underground resources, digging tunnels, and other operations.

However, when the excavated material is to be transported outside the mine, it is better if the material is not too finely cut, but excavating with an excavating machine has the disadvantage that the excavated material becomes too fine.
In addition, the method using explosives is dangerous and generates noise, so it has the disadvantage that the places where it can be used are limited.

Therefore, new methods of destruction or excavation that do not use explosives are being developed, and several non-blasting methods have been developed so far, but the most effective method is No. 48-40504. There are known methods that utilize the vaporization expansion pressure of liquefied carbon dioxide as disclosed in publications and the like.

<Problems to be solved by the invention> Conventional crushing equipment that uses the vaporization expansion pressure of liquefied carbon dioxide fundamentally cannot reuse the equipment itself, is cumbersome to carry, and requires pretreatment. The drawback is that it is time-consuming and increases construction costs.

<Means for Solving the Problems> The crushing device according to the present invention fills liquefied carbon dioxide into a filling tube whose tip is sealed with a sealing plate that crushes at a certain pressure, and liquefied carbon dioxide from the sealing plate to the tip side. A carbon gas jet port is provided, a cylindrical body filled with an activator is installed in the filling tube, and a current terminal for activating the activator is provided on the rear side of the filling tube. It is something.

<Operation> After drilling a hole for inserting the filling tube into the object to be crushed and press-fitting at least the tip side of the filling tube into the hole, electricity is applied to the activator to activate the activator, which causes carbonation. The gas rapidly vaporizes and expands and blows out from the spout, crushing the object to be crushed.

<Example> Fig. 1 shows a longitudinal section of a crushing device according to an embodiment of the present invention, Fig. 2 shows a perspective appearance of a discharge head, and Fig. 3 shows a broken appearance of an ignition head. .

Reference numeral 1 denotes a long filling tube, and both ends thereof are provided with stepped portions 2 and 3 and female threaded portions 4 and 5 are formed therein. Since the filling tube 1 needs to be able to withstand high pressure, it is made of a high-strength material, such as special alloy steel.

A discharge head 7 is attached to the distal end of the filling tube 1 via a sealing plate 6. The sealing plate 6 ruptures under a certain pressure and is made of, for example, mild steel. The discharge head 7 consists of a main body 8 and a pair of claws 9a and 9b. A through groove 11 having tapered surfaces 10a, 10b is formed in the main body 8, and a pin 12 provided in this groove 11 allows the pair of claws 9a, 9
b is supported laterally so that it can be freely opened and closed. Claw 9a,
When 9b is closed, the tapered surfaces 10a, 10
It follows b. A male threaded portion 13 is formed at the rear of the main body 8 and is threaded into the female threaded portion 4 at the tip of the filling tube 1. Also, an ejection hole 14 that opens to the tapered surfaces 10a and 10b is provided. In the figure, 15 is a spout.

An ignition head 16 is attached to the rear end of the filling tube 1. A cylindrical male threaded part 18 is provided at the tip of the main body 17 of the ignition head 16 and is screwed into the female threaded part 5 at the rear end of the filling 1, and the rear part of the activator filling body 19 is inserted into this threaded part 18. It can be accommodated. Activator filling body 19
is made by filling a paper cylinder 20 with an activator 21,
The paper cylinder 20 is provided with a fuse (low-pressure powder fuse) 22 that guides a current that activates the activator 21. The activator 21 is a vaporization aid for liquefied carbon dioxide, and for example, a mixture of potassium perchlorate and hydroxybenzoic acid is used. Main body 1
The electrode sleeve 23 is screwed into the inside of the electrode sleeve 23 from the male threaded portion 18 side. The electrode sleeve 23 has an electrode 24, and the electrode 24 is connected to the fuse 22 with the activator filling body 19 installed in the male threaded portion 18. At the rear of the electrode sleeve 23, the main body 17 is provided with a connector 25 that connects to the electrode sleeve 23. On the other hand, an injection hole 26 is bored in the main body 17 from the inner bottom surface of the male threaded portion 18 to the rear end surface of the main body 17.
A valve 27 is screwed onto the rear end of the valve 7.

The discharge head 7 is attached to the tip of the filling tube 1 via the sealing plate 6, the activator filling body 19 is installed, and the ignition head 16 is attached to the rear end of the filling tube 1. Liquefied carbon dioxide 28 is then filled into the filling tube 1 through the injection hole 26 .

Next, strata, rocks, and
The action of crushing concrete, etc. will be explained with reference to FIGS. 4 to 7. Incidentally, here, a case where underground coal seams and the like are crushed will be taken as an example.

First, the connector 25 at the rear end of the crushing device 29 and an external battery are connected using the cable 30. On the other hand, a hole 32 for inserting the crushing device 29 is drilled in the stratum 31 to be crushed. This drilling is done using a conventional rotary drilling machine or the like.

Next, the crushing device 29 is inserted into the hole 32.

With the above, preparation is complete, and in the above state, low voltage current is supplied from the cable 30. The low voltage current flows through the connector 25, the current sleeve 23, and the electrode 24 to the fuse 22. When current flows through the fuse 22, the activator 21 in the activator filling body 19 is activated.
Vaporization of the liquefied carbon dioxide 28 is promoted.

When the liquefied carbon dioxide 28 continues to vaporize and the pressure inside the filling tube 1 reaches a certain value, the sealing plate 6 at the tip of the filling tube 1 breaks and carbon dioxide gas (hereinafter referred to as carbon dioxide gas) is released.
28a passes through the nozzle 14 and from the nozzle 15 the fourth
It ejects to the side as shown in the figure. Carbon dioxide gas 28a
When carbon dioxide is ejected from the ejection hole 14, the claws 9a and 9b are pushed apart, and the force that tries to push the crushing device 29 out of the hole 32 due to the ejection of carbon dioxide gas 28a bites into the surrounding strata, causing the crushing device 29 to Escape is prevented.

As shown in Fig. 5, the carbon dioxide gas 28a is
It invades along the weak line of No. 1 and finally fractures the stratum 31 as shown in FIG. 6 and further in FIG. 7. The obtained fragments 31a are in the form of a lump, which is convenient for carrying out processing.

The used crushing device 29 is repeatedly used by replacing the sealing plate 6 and the activator filling body 19 and filling it with liquefied carbon dioxide 28.

The gas volume required for crushing strata and other objects to be crushed can be adjusted by changing the capacity of the filling pipe 1, and the gas release pressure can be adjusted by changing the thickness, material, etc. of the sealing plate 6. can be adjusted more precisely.

This device is applicable not only to geological formations as in the above embodiments, but also to crushing rocks and concrete, and various civil engineering works.

<Effects of the Invention> According to the present invention, the filling tube can be reused simply by refilling it with liquefied carbon dioxide gas and an activator, and it is easy to carry. In addition, it is only necessary to make a hole for inserting a filling tube in the object to be crushed, and the crushing operation can be carried out completely and quickly, and the construction cost can be kept low.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a crushing device according to an embodiment of the present invention, FIG. 2 is a perspective external view of a discharge head, and FIG.
The figure is a cutaway perspective view of the ignition head, and Figures 4 to 7 are explanatory diagrams showing the process of crushing the strata. In the drawing, 1 is a filling tube, 6 is a sealing plate, 7 is a discharge head, 9a, 9b are claws, 15 is a spout, 16 is an ignition head, 19 is an activator filling body, 21 is an activator,
22 is a fuse, 24 is an electrode, 27 is a valve, 2
8 is liquefied carbon dioxide, 28a is carbon dioxide gas,
29 is a crushing device, and 30 is a cable.

Claims (1)

[Claims] 1 A cylindrical body whose tip is sealed with a sealing plate that is crushed under a certain pressure is filled with liquefied carbon dioxide, and a carbon dioxide gas outlet is provided on the tip side of the sealing plate, while an activator is filled. is installed in the filling tube, and a current terminal for activating the activator is provided on the rear side of the filling tube.