JP2000046755A - Method and apparatus for penetration of crack-detecting chemical into rock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect a fine crack in a sample by pressing a crack-detecting chemical into the sample of rock. SOLUTION: A crack-detecting chemical in a crack-detecting drug tank 10 is continuously sent with a pressure to a lower part of a rock sample S through a crack-detecting chemical storage cylinder 22. The pressure at this time is approximately 1 kg/cm2. The crack-detecting chemical 11 supplied to the lower part of the rock sample S penetrates a crack of the rock sample S, replaces the air in the rock sample S thereby discharging the air out of a piping 31. In this case, since the pressured crack-detecting chemical 11 is supplied from the lower part of the rock sample S, the crack in the rock sample S is expanded to facilitate the penetration of the crack-detecting chemical 11 to the crack. The air extruded from the crack is smoothly guided upward becomes it is lighter than the crack-detecting chemical 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for infiltrating a crack detection agent into a rock in which a crack detection agent is penetrated into a rock to detect fine cracks in the rock.

[0002]

2. Description of the Related Art Conventionally, as a method for infiltrating a crack detecting agent into a rock of this kind, as shown in FIG. 3, a rock sample 2 immersed in a crack detecting agent 1 is placed in a desiccator 3 and a desiccator is used by using a vacuum pump. A method is known in which the inside of the rock sample 3 is evacuated to replace the air in the rock sample 2 with the crack detection agent 1. For example, the rock sample 2 impregnated with the crack detection agent 1 is immersed in the desiccator 3 in the desiccator 3 and evacuated at a vacuum pump pressure of 75 mmHg for 4 hours, so that the rock sample 2 is impregnated with the crack detection agent 1 in a desiccator. 24 hours at 70 ° C
And dried at 80 ° C. for 24 hours to solidify.
Next, the solidified rock sample 2 is cut, and the cut surface is polished with an abrasive 3000 #. Further, the polished surface of the polished rock sample 2 is analyzed using an image analyzer.

[0003]

In the above-mentioned conventional method for infiltrating a crack detecting agent into a rock, the crack detecting agent 1 penetrates into a rock sample 2 by vacuum suction. The fine cracks of the sample 2 move in the closing direction due to the vacuum suction.
There is a problem that the crack detection agent 1 hardly penetrates into the fine cracks.

The present invention has been made in view of the above circumstances, and an object of the present invention is to allow a crack detection agent to smoothly penetrate into fine cracks in a rock sample, and to allow fine particles in a rock sample to be penetrated. An object of the present invention is to provide a method and a device for penetrating a crack detection agent into rock, which can reliably detect a crack.

[0005]

A first aspect of the present invention is a method for infiltrating a crack detecting agent into a rock, in which the crack detecting agent is infiltrated into a crack in the rock, wherein the crack detecting agent under pressure is applied to the rock. The rock sample is supplied to and penetrated, and the rock sample is saturated with the crack detecting agent. This claim 1
In the method, by injecting a crack detecting agent into the rock sample, the fine cracks in the rock sample are in a spreading direction, so that the crack detecting agent easily penetrates and the fine cracks are spread and easily detected. According to a second aspect of the present invention, the crack detecting agent has a fluorescent agent and an adhesive resin. According to the second aspect, the bonding resin of the crack detection agent that has permeated into the fine cracks in the rock sample is solidified,
By fixing the state of the fine cracks and irradiating the fluorescent agent of the crack detection agent with ultraviolet light,
The fluorescent agent emits light and fine cracks are detected. According to a third aspect of the present invention, a crack detection agent is infiltrated from a lower portion of the rock sample, and the amount of the crack detection agent coming out of the upper portion of the rock sample is measured. At this point, it is determined that the rock sample is saturated with the crack detecting agent. In this claim 3,
By infiltrating the crack detection agent from the lower part of the rock sample, the air present in the fine cracks of the rock sample is easily replaced with the crack detection agent, and this air easily escapes from above the rock sample and the rock When the amount of the crack detecting agent flowing out from above the sample becomes constant, it is determined that the crack detecting agent in the rock sample is saturated, and the operation of infiltrating the crack detecting agent is ended. Claim 4 of the present invention is a device for infiltrating a crack detection agent into a rock, which penetrates a crack detection agent into a rock, and which is connected to the crack detection agent tank for storing the crack detection agent and the crack detection agent tank. And a crack detecting agent pumping means for pumping the crack detecting agent in the crack detecting agent tank, and holding the rock sample in a state where the outside of the rock sample is sealed with a sealing material, and pumping the rock sample from the crack detecting agent pumping means. A rock sample holding means for allowing the crack detection agent to penetrate from the lower part of the rock sample, and a crack detection agent connected to the rock sample holding means and flowing out of an upper part of the rock sample held by the rock sample holding means. And a crack detecting agent measuring means for measuring the amount thereof. According to this aspect, the crack detecting agent in the crack detecting agent tank is pumped by the crack detecting agent pumping means and penetrates from below the rock sample held by the rock sample holding means. The measuring means measures the amount of the crack detection agent flowing out from the upper portion of the rock sample to determine whether or not the rock sample is saturated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an apparatus for penetrating a crack detection agent into rock according to one embodiment of the present invention.
In this figure, reference numeral 10 denotes a crack detection agent tank that stores the crack detection agent 11. The crack detecting agent tank 10 is provided with a crack detecting agent pumping means 13 through an on-off valve 12.
Are connected. This crack detection medicine pumping means 13
A compressor 14 is connected to both ends of a cylinder 20 via an on-off valve 15, a pressure gauge 16, an on-off valve 17, three-way valves 18, 19, respectively, and a plunger 21 is slidably provided in the cylinder 20, and The tip of the plunger 21 is slidably fitted into the split detection medicine storage tube 22. Then, the crack detection medicine storage cylinder 22
Is connected to the crack detection medicine tank 10 via the on-off valve 12, and
The rock sample holding means 25 is connected.

The rock sample holding means 25 includes a mounting table 27 on which a rock sample S whose outer periphery is sealed with a sealing material 26 is mounted.
And a lift board 28 provided above the mounting table 27 so as to be able to move up and down by operating a handle.
The split detection medicine storage cylinder 22 is connected to the mounting table 27 via the on-off valves 24 and 23. Also,
A pipe 3 having an on-off valve 29 connected to the lift board 28;
1 discharges the crack detecting agent 11 into the crack detecting agent measuring means (buret) 30. The burette 30 is a cylindrical measuring tube with a scale having a bottom and an open top. Further, the rock sample holding means 2
5 is, for example, a modified rock compression strength tester. As the crack detecting agent 11, for example, an agent made of an oil-soluble fluorescent paint, if necessary, a colored paint, and a cyanoacrylate-based adhesive (2-cyanoacrylate) is used.

When the crack detecting agent 11 is made to penetrate into the rock sample S by using the crack detecting agent penetrating apparatus configured as described above, first, the rock sample S whose outer periphery is sealed with the sealing material 26 is used as the rock sample S. It is placed on the mounting table 27 of the holding means 25, and the space between the mounting table 27 and the lifting plate 28 is narrowed.
The rock sample S is sandwiched between the lift 7 and the lift 28.

In this state, the on-off valves 15 and 17 are opened, and the three-way valves 18 and 19 are operated to operate the compressor 1.
4 and the upper end of the cylinder 20, while opening the lower end of the cylinder to the atmosphere, opening the on-off valve 12 and closing the on-off valve 23, the compressed air generated by the compressor 14 is moved to the upper end of the cylinder 20. The plunger 21 in the cylinder 20
Is lowered. As a result, as the plunger 21 descends, the crack detection medicine 11 flows from the crack detection medicine tank 10 into the crack detection medicine storage tube 22.

Next, the three-way valves 18 and 19 are operated to communicate the compressor 14 with the lower end of the cylinder 20, open the upper end of the cylinder to the atmosphere, close the on-off valve 12, and close the on-off valve. By opening 23, compressed air from the compressor 14 is supplied from the lower end of the cylinder 20 into the cylinder 20, and the plunger 21 in the cylinder 20 is raised. Thereby, the crack detection medicine 11 in the crack detection medicine storage cylinder 22 is pushed out by the plunger 21 and supplied to the lower part of the rock sample S held by the rock sample holding means 25.

By repeating this operation, the crack detecting agent 11 in the crack detecting agent tank 10 is continuously pumped to the lower part of the rock sample S via the crack detecting agent storage tube 22. The pressure at this time is about 1 kg / cm ² .

The crack detecting agent 11 supplied to the lower portion of the rock sample S penetrates into the cracks of the rock sample S, replaces the air in the rock sample S, and replaces the air with the piping on the upper portion of the rock sample S. Discharge from 31. In this case, since the crack detection agent 11 to which pressure is applied is supplied to the rock sample S from the lower part, the crack in the rock sample S is in a direction in which the crack is expanded, and the crack detection agent is easily inserted into the crack. 11
As the air permeates, the air pushed out of the cracks
Since it is lighter than the crack detection agent 11, it is smoothly drawn upward.

Further, the crack detecting agent 11 that has penetrated into the rock sample S and reached the upper portion of the rock sample S is discharged from the upper portion of the rock sample S and passes through the pipe 31 into the crack detecting agent measuring means 30. Will be collected. Then, the amount of the crack detecting agent 11 in the crack detecting agent measuring means 30 is measured at regular intervals, and when the measured flow amount of the crack detecting agent 11 becomes constant, the rock sample S is separated from the crack detecting agent 11. , And the infiltration operation is terminated.

Subsequently, the mounting table 2 of the rock sample holding means 25
7, the rock sample S is taken out by opening the lift plate 28, the rock sample S saturated with the crack detecting agent 11 is immersed in a fluorescent agent, and further dried in a dryer at 65 ° C. for 24 hours and at 70 ° C. for 2 hours.
Dry for 4 hours at 80 ° C for 24 hours to solidify. Next, the solidified rock sample S is cut, and the cut surface is polished with an abrasive 3000 #. Then, the polished rock sample S is irradiated with ultraviolet light to cause the fluorescent agent that has penetrated into the cracks of the rock sample S to emit light, and is analyzed using an image analyzer.

As a result of the penetration test of the crack detecting agent 11 as described above, as shown in FIG. 2, fine cracks which are divided into networks from the main cracks in which water easily flows in the rock are more clearly detected. We were able to.

[0016]

According to the first aspect of the present invention, a crack detecting agent under pressure is supplied to a rock sample to be penetrated, and the rock sample is saturated with the crack detecting agent. By inserting the crack detection agent into the rock sample, the fine cracks in the rock sample will spread out, and the crack detection agent can smoothly penetrate to the fine cracks in the rock sample. It can be detected reliably. Claim 2 of the present invention is a crack detection agent,
Since it has a fluorescent agent and an adhesive resin, it is possible to reliably fix the state of the fine cracks by solidifying the adhesive resin of the crack detecting agent that has penetrated into the fine cracks of the rock sample. By irradiating the fluorescent agent of the crack detection agent with ultraviolet rays, the fluorescent agent emits light and fine cracks can be easily detected.
According to a third aspect of the present invention, a crack detection agent is infiltrated from a lower portion of the rock sample, and the amount of the crack detection agent coming out of the upper portion of the rock sample is measured. At this point, the rock sample is judged to be saturated with the crack detection agent, so that by infiltrating the crack detection agent from below the rock sample, the air present in the fine cracks of the rock sample can be easily removed. When the crack detector is replaced with a crack detector, this air easily escapes from above the rock sample, and when the amount of the crack detector flowing out from above the rock sample becomes constant, the crack detector in the rock sample is saturated. Judgment is made and the operation for infiltrating the crack detection agent is terminated. Thereby, the operation of infiltrating the crack detection agent into the rock sample can be performed quickly and reliably. Claim 4 of the present invention
A crack detecting agent tank for storing the crack detecting agent, a crack detecting agent pumping means connected to the crack detecting agent tank and for pumping the crack detecting agent in the crack detecting agent tank, and a sealing material on the outside of the rock sample. In a sealed state,
A rock sample holding means for holding the rock sample and allowing the crack detection agent pumped from the crack detection agent pumping means to penetrate from below the rock sample, and connected to the rock sample holding means, and for holding the rock sample. And a crack detecting agent measuring means for collecting the crack detecting agent flowing out from the upper part of the rock sample held by the means and measuring the amount thereof. The crack detection agent is pumped, penetrates from the lower part of the rock sample held by the rock sample holding means, and the amount of the crack detection agent flowing out from the upper part of the rock sample is measured by the crack detection agent measurement means. By judging whether or not it is saturated, the crack detection agent can easily penetrate the rock sample, and the fine cracks in the rock sample can be reliably detected. It can be.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an apparatus for penetrating a crack detection agent into rock according to one embodiment of the present invention.

FIG. 2 is a diagram showing the results of a crack detection drug penetration test.

FIG. 3 is an explanatory view showing a conventional method for penetrating a crack detection agent.

[Explanation of symbols]

 S Rock sample 10 Crack detector tank 11 Crack detector 13 Crack detector pumping means 25 Rock sample holding means 26 Sealing material 30 Crack detector drug measuring means (buret)

Claims (4)

[Claims] Claims 1. A method for infiltrating a crack detection agent into a rock, in which a crack detection agent is penetrated into a rock, wherein the crack detection agent in a pressure-applied state is supplied to and penetrated into a rock sample. A method for infiltrating a rock with a crack detecting agent, wherein the method is saturated with the crack detecting agent. 2. The method according to claim 1, wherein the crack detecting agent has a fluorescent agent and an adhesive resin. 3. A crack detecting agent is permeated from a lower portion of the rock sample, and the amount of the crack detecting agent coming out of the upper portion of the rock sample is measured. 3. The method according to claim 1 or 2, wherein it is determined that the rock sample is saturated with the crack detecting agent. 4. A device for infiltrating a crack detecting agent into a rock, which penetrates a crack detecting agent into a crack in a rock, comprising: a crack detecting agent tank for storing the crack detecting agent; The crack detecting agent pumping means for pumping the crack detecting agent in the crack detecting agent tank, and the rock sample is held in a state where the outside of the rock sample is sealed with a sealing material, and the rock sample has been pumped from the crack detecting agent pumping means. A rock sample holding means for allowing the crack detection agent to penetrate from below the rock sample, and recovering the crack detection agent connected to the rock sample holding means and flowing out of an upper part of the rock sample held by the rock sample holding means. And a crack detecting agent measuring means for measuring the amount of the crack detecting agent.