JPS6124770A - Destruction of fragile body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is applicable to rock crushing in civil engineering works. - This relates to methods of destroying brittle bodies such as subdividing rocks, crushing and demolition of concrete structures, and crushing the head of concrete piles in foundation work.

``Prior art'' Conventionally, as methods for destroying rocks or concrete bodies, there have been blasting methods using explosives, methods using hydraulic pressure, methods using mechanical impact force using lucas, etc., and furthermore, swelling using lime-based expansion agents. There is a method that utilizes the swelling effect.

However, in the method of blasting, vibrations, noise, and flying stones are generated when the object to be destroyed is blasted, and its use is restricted depending on the state of the surrounding environment, and there are also restrictions under the Explosives Control Law.

To deal with such problems of vibration, noise, and flying stones,
Among explosives, a method using controlled blasting explosives whose detonation speed is considerably lower than that of normal explosives, and a method using a concrete crusher that destroys the concrete using gas pressure have also been proposed.

However, none of these methods has completely solved the problems of vibration, noise, and flying stones.

Another method is to utilize the volumetric expansion caused by the reaction between quicklime and water. In this method, quicklime is made into a paste that reacts quickly and is loaded into the drilled hole to seal the hole cap. Although the reaction must be delayed until then, a large expansion force is desirable after loading, and for this reason various methods of accelerating the reaction have been attempted.

For example, there is a method of accelerating the reaction by heating with a heating wire as shown in Japanese Patent Publication No. 43416/1982, and Japanese Patent Application Laid-Open No. 55/1987 (1986) discloses a method of promoting the reaction by heating with a heating wire.
There are methods shown in Publication No. 142894, but these all attempt to solve the difficulties of using the hydration reaction of quicklime, but they do not significantly increase the destructive force itself. , and the handling is complicated.

A method using a thermite agent has also been proposed, but
The purpose of using thermite agent in these 9 methods is to promote the hydration reaction of swelling agents such as quicklime, and the treatment for delaying the reaction of quicklime, which is the main force of destructive force, The same complications as in reaction-based methods remain.

"Problems to be Solved by the Invention" The present invention suppresses the scattering, vibration, and noise of objects to be destroyed due to the impactful blasting of explosives and explosives, and also solves the problem of the lack of destructive power of conventional lime-based expanding agents. This is an attempt to solve problems such as the complexity of handling and the long time it takes to destroy.

That is, the present invention obtains an explosive force equivalent to that of explosives,
The object of the present invention is to provide a destruction method that can be destroyed in a short time and does not involve scattering or vibration of the destruction body, similar to the destruction method using an expanding agent.

"How to destroy problems" In order to achieve the above object, the present invention provides a method for producing rocks.

After loading a container containing a heating agent, powder of ignition agent, and an ignition device made of a resistance heating element into the drilled part of the object to be destroyed, which is made of a brittle body such as rock or concrete, the ignition device is , the ignition agent is ignited, causing the exothermic agent to react, and the reaction heat of the exothermic agent deteriorates the strength of the object to be destroyed, and the water vapor pressure generated by vaporization of the moisture contained in the object causes the exothermic agent to react. It is designed to cause the object to be destroyed to be destroyed.

In addition to the above-mentioned means, the present invention further provides that when the moisture inside the object to be destroyed is not sufficient to generate the steam necessary for destruction, the present invention provides a container enclosing an ignition device consisting of a heat-generating agent, powder of ignition agent, and a resistance heating element. A container filled with water in an amount less than that which is vaporized by the reaction of the exothermic agent is loaded into the drilled part of the object to be destroyed, and the water in the container is vaporized by the reaction heat of the exothermic agent.

"Operation" In the present invention, as described above, a container containing an igniter made of a heat generating agent, powder of igniting agent, and a resistance heating element is loaded into the drilled part of the object to be destroyed, and the igniter is connected to the igniter. By applying electricity, the ignition agent is ignited and the exothermic agent is caused to react, so that the object to be destroyed is heated by the reaction heat of the exothermic agent, and its strength is deteriorated. The moisture contained within the destroyed body evaporates,
This vapor pressure causes the object to be destroyed internally.

In addition, if a container filled with water is used in conjunction with the above-mentioned container, the water in the container will evaporate, but the hole in the drilled part of the object to be destroyed will be blocked by the melted exothermic agent, causing a large amount of damage to the object to be destroyed. It is something that is destroyed by applying pressure.

In this way, according to the method of the present invention, the object to be destroyed is destroyed by deterioration of its strength due to heat and pressurization by water vapor pressure, so there is no impact as in the case of blasting with explosives, and the object to be destroyed is 4 degrees of bending causing scattering of bodies ``Embodiment'' Next, the present invention will be described with reference to the illustrated embodiments.

(1) is a body to be destroyed, such as a concrete body, with a relatively large internal moisture content, and a hole is drilled along its fracture surface (2),
(See FIG. 2) A container (4) containing an electric ignition device consisting of a heating agent, powder of ignition agent, and a resistance heating element is loaded into each of the drilled portions (3).

Figure 3 shows the details of the same container (4), in which a heat generating agent (5) consisting of a mixture of iron oxide and aluminum powder (weight ratio 2.81) is sealed inside the thin plastic container. An igniter (6) consisting of a mixed powder of barium peroxide, magnesium, etc. is placed on the agent (5), and an electric igniter (force) such as a nichrome wire is attached to the igniter (6).

When the container (4) is loaded into the deep part of the drilled hole (3) in this way, the igniter (7) is connected to the igniter (9) via the leg wire (8)', and (3) Close the hole with mortar or the like.

After the mortar had hardened, the ignition device (9) K was energized.

The exothermic agent (5) is ignited to cause a reaction, and the heat of reaction heats the object (1) to be destroyed, deteriorating its strength, and the moisture contained inside the object (1) is removed by the heat of reaction. The object to be destroyed (1) is destroyed by the generated water vapor pressure.

In addition, as in the illustrated example as the exothermic agent (5),
The reaction formula when using a mixture of iron oxide and aluminum powder as one of the thermite agents conventionally used in chilled welding is the following formula: 3Fe304+8AJ-9Fe+
4AA! It is expressed as zos + 702.500 cal, and a large amount of calorific value is obtained instantaneously, and thermite agent is approximately 280 cal.
It turns into iron and alumina in a high-temperature melted state at 0°C and blocks the drilled hole.

The hydration reaction of quicklime is given as a comparative example. In this case, one reaction formula is the following formula: CaO+H2O-+0a(OH)2+15,200ca
In addition to the fact that the calorific value is smaller than that of the previous equation, it is difficult to utilize the expansion reaction of quicklime effectively as described above.

Diagram M4 shows the case where the present invention is applied to a body to be destroyed, such as a solid rock with a large internal moisture content, such as a concrete body.
The exothermic agent (5), the ignition agent (6) and the electric ignition device (
7) along the container (4) sealed with i or the answering device (
4) Load a thin-walled bag or container with water sealed inside the hole (3).

After that, the hole in the drilled hole (3) is closed with gold mortar I, etc., and after it hardens, the igniter (9) is energized and the container (4) is closed.
) is ignited and reacted, and the reaction heat heats the object to be destroyed (1) and deteriorates its strength, and the steam generated by heating the water in the bag or container. The object to be destroyed (1) is destroyed by pressure. - In the above example, 303 grams of iron oxide Fe3O4 powder and 108 grams of aluminum powder were used for each drilled part (3).
A polyethylene bag filled with a mass of water is placed along the center of the container containing the exothermic agent.

It is desirable that the amount of water be adjusted to the extent that the entire amount is vaporized in accordance with the calorific value of the exothermic agent.

Of course, the moisture inside the body to be destroyed must be taken into account, but
Even if there is not enough water in the object to be destroyed and a water container is used, it is better to keep the total amount of water below the amount that can be vaporized by heating.

The fifth factor shows still another embodiment of the present invention, in which the drilling portion (3)
To load the container (4) filled with K exothermic agent, etc. and the bag or container αQ filled with water, insert a heat insulating material (I side) between the two parts (4) and insert the bag from the exothermic agent. Alternatively, after the heat transfer to the water in the container (II) is delayed, and the exothermic agent reacts and forms a fluid, it is further solidified and the hole of the drilled hole (3) is completely closed. The water in the bag or container (11) vaporizes and destroys the bag or container αI￥C, and also destroys the hole wall of the hole drilling part (3) and destroys the object (1) to be destroyed.This implementation For example, there is an advantage that it is possible to omit the work of closing the hole opening of the drilled part (3) with mortar or the like prior to the reaction of the exothermic agent.

``Effects of the Invention'' According to the present invention, the object to be destroyed is directly heated to a high temperature by the exothermic reaction of the exothermic agent enclosed in a container loaded into the drilled part of the object to be destroyed, thereby increasing its strength. The water vapor pressure is fully utilized as a destructive force by completely vaporizing the water in the space sealed by the molten exothermic agent as well as deteriorating it.

Since the destructive force is not caused by an impact force such as that of an explosive, the object to be destroyed will not be scattered, and unlike the conventional destructive method using a quicklime-based expansion agent, the drilling area will not be affected. There is no need to adjust the reaction rate for loading, and there is no problem of hole clogging to suppress ejection from the drilled hole.

Therefore, safe destruction work can be carried out in a short time with simple operations.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. ,

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the method for destroying a brittle body according to the present invention, FIG. 2 is an oblique view showing the state of drilling a hole in the object to be destroyed, and FIG. 3 is a hole drilling section. FIGS. 4 and 5 are longitudinal sectional views showing the state of implementation of other embodiments of the method of the present invention, respectively. (1)...Object to be destroyed, (3)...Drilled part, (4)...
...Container, (5)--Exothermic agent, (6)--Ignition agent,
(Power: Electric ignition device, (11: Bag or container completely filled with water.

Claims (2)

[Claims] (1) Powder of exothermic agent, ignition agent,
After loading a container in which an ignition device made of a resistance heating element is enclosed, electricity is applied to the ignition device to ignite the ignition agent to cause the exothermic agent to react, and the reaction heat of the exothermic agent causes the object to be destroyed to be destroyed. A method for destroying a brittle body, the method comprising: degrading the strength of the body, and destroying the body by water vapor pressure generated by vaporization of moisture contained in the body. (2) Powder of exothermic agent, ignition agent,
and a container enclosing an igniter made of a resistance heating element, and a container enclosing water in an amount less than that which is vaporized by the reaction of the exothermic agent, and then energizing the igniter,
The ignition device is ignited to cause the exothermic agent to react, and the reaction heat of the exothermic agent deteriorates the strength of the object to be destroyed, and the water vapor pressure generated by vaporization of the moisture contained in the object and the moisture sealed in the container. A method for destroying a brittle body, characterized in that the object to be destroyed is destroyed by: