JPS61286492A - Method of crushing rock, etc. - 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 Technical Field The present invention relates to a method for crushing rocks, concrete, etc.

Conventionally, all explosives are used to crush rocks, etc., but the blasting vibrations, noise, and scattering of rocks have a large impact on the surrounding area, making it difficult to crush in urban areas or in locations close to existing structures. Due to safety concerns, the use of explosives is not permitted during the work. Crushing in such places is carried out using an expanding agent or a crusher, but these have the drawbacks of high material and machine costs (as well as the long time it takes for the crushing operation).

Purpose The purpose of this invention is to eliminate the drawback 1 of the conventional method as described above, and to provide a method that does not generate vibration or noise during crushing, and can crush safely and economically. shall be.

Structure To achieve the above-mentioned object, the present invention involves drilling a hole in an object to be crushed such as a rock, inserting a container filled with liquid and a heat generating agent into the hole, and then inserting a heat generating agent into the hole. ii-
A method for crushing rocks, etc., characterized in that the water in the container is heated and vaporized by causing the exothermic agent to generate heat, and the object to be crushed is completely crushed by the steam pressure.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows a crushing tool 11 used in the method of this invention.
This crushing tool 11 is equipped with a closed container 2 having a recess 1 in the upper part, and water 3 is sealed inside the container 2 from an injection port (not shown). A heating agent 4 and an ignition agent 5 are accommodated in a separated manner in the recess 1, and an igniter 6 such as a heater or a plug is disposed inside the ignition agent 5.
After the leg line 7 is drawn out to the outside, the recess 1 is sealed with a lid 8.

As the exothermic agent 4, a thermite agent made of a mixture of aluminum powder and iron oxide is used, and as the ignition agent 5, a magnesium-based agent is used. Further, the container 2 used has a strength such that it will break if its internal pressure exceeds the set pressure (the pressure when the water in the container z is heated to a boiling point or higher).

The crushing method will now be explained with reference to FIGS. 2 to 4.

First, as shown in the second figure, a hole 10 is drilled in the object 9 to be crushed, such as rock or concrete, using a rock drill or the like. Next, as shown in the third figure, a crushing tool 11 is inserted into the hole lO, and then a 4. As shown in the figure, the hole 10 is plugged with orange 12, thus completing preparation for crushing.

In the above state, when the igniter 6 is energized via the leg wire 7 to ignite the igniter 5, a high temperature of 1500°C is instantaneously obtained, and the exothermic agent 4 becomes 2
．． It generates high heat of 700°C to 2,800°C, heats the water 3 inside the container 2 while it is sealed, and pressurizes the inside of the container 2 due to thermal expansion of the water 3. When the pressure exceeds the set pressure, the container 2 ruptures, and the water 3 heated above its boiling point vaporizes all at once, exerting steam pressure inside the pores IO. Further, the high heat generated by the exothermic agent 4 weakens the peripheral wall of the hole 10, and the object 9 to be crushed is crushed by steam pressure combined with this weakening.

In this crushing method, it is necessary to seal the plug that seals the inside of the hole with a force greater than the maximum vapor pressure generated in the hole.

FIG. 5 shows the structure of the plug 12 for this purpose and the device for inserting it. The stopper 12 is made of a deformable material such as hard urethane rubber, and has a plurality of protrusions 12m formed on its outer periphery. The insertion device includes a fluid pressure cylinder 13 and a guide tube 14 connected thereto, and the guide tube 14 has a loading port 15 in its peripheral wall at the end and a tapered portion 16 in the middle.

When inserting the plug 12, insert the tip of the guide tube 14 into the hole 10, apply lubricant to the entire plug 12, load the orange into the guide tube 14 from the loading port 15, and insert the orange into the cylinder 13. is operated to extend the piston rod 17. As a result, the plug 12 slides inside the guide '#14, is compressed in the radial direction at the tapered part 16, and is radially compressed from the tip of the guide tube 14 to the hole lO.
being pushed inward. The orange 12 extruded into the hole 1G is pressed against the peripheral wall of the hole 1O by its restoring force, and is formed into a dense layer.

Effects As described above, this invention heats the liquid using a heat generating agent and uses its vapor pressure E to crush the object to be crushed, so unlike the conventional method of blasting, there is no generation of vibration or noise.
There is also less scattering of crushed materials. Since the materials used are mainly a liquid and an exothermic agent for vaporizing it, the cost is low and crushing can be carried out quickly compared to methods using an expanding agent or the like. By using a thermite agent as an exothermic agent, the reaction itself is not explosive and is not subject to hazardous materials handling, so there are no restrictions on where it can be carried out.
It is also extremely safe in handling such as storage and transportation. Furthermore, it does not generate harmful gases, and does not require ventilation even when used in narrow spaces such as inside tunnels.

[Brief explanation of the drawing]

Figure 1 shows an example of a crushing tool used in the method of this invention.
2 to 4 are schematic longitudinal sectional views showing the steps of the method of the present invention, and FIG. 5 is a longitudinal sectional view showing an example of a stopper and its insertion device. 2... Container 3... Water 4... Exothermic agent 5... Ignition agent 6... Ignition tool 9... Object to be crushed 10... Hole
12... Bung ffi+ (¥1 Mu5 Ward

Claims (1)

[Claims] 1. After drilling a hole in the object to be crushed, such as a rock, a container filled with liquid and a heat-generating agent are inserted into the hole, the hole is closed, and the heat-generating agent is made to generate heat. A method for crushing rocks, etc., characterized by heating and vaporizing a liquid, and crushing the object to be crushed by the vapor pressure.