JPH06173585A - Tunnel cutting face operation monitoring device - Google Patents

Abstract

PURPOSE:To make it possible to give an exact indication to operators by objectively judging conditions of the facing to ensure safety of construction and monitoring always from aboveground side operating conditions at the facing of a tunnel. CONSTITUTION:A CCD camera 8 is attached to the head 6 of an operator 5 so as to be directed forward who operates an operation device 3 at a tunnel cutting face 2 in a tunnel 1 and a monitor 14 is provided on the ground. Images taken by the CCD camera 8 are transferred to the monitor 14 to display them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for monitoring the working status of tunnel face and the condition of rock on the ground.

[0002]

2. Description of the Related Art NATM is currently used in mountain tunnel construction.
(New Austrian Tunnel-lining Method) method is generally used for construction. This method is basically a method of spraying concrete on the wall surface of the tunnel after excavating the tunnel pit, but the concrete construction method and procedure are as follows: It changes according to the spring conditions. For example, support works will be added, and the concrete spray thickness will be changed.

[0003]

By the way, the confirmation of the condition of the face such as the rock quality of the face, the hardness of the rock, the condition of the spring water is as follows.
Conventionally, it was performed only on the operator side in the tunnel. In this case, the face condition is not confirmed based on objective data but only by the operator's intuition, which is likely to be a subjective judgment, and the worker is required to have skill.
In addition, there is a problem in terms of safety when the work is carried out while the face of the worker is checked only by the worker.

Therefore, an object of the present invention is to objectively judge the condition of the cutting face and to constantly monitor the working condition of the tunnel face on the ground side in order to ensure the safety of construction and to give an appropriate instruction. It is to provide a tunnel face work monitoring system that can be given to workers.

[0005]

In order to achieve the above object, the inventor of the present invention thought that the condition of the face should be photographed by a video camera and the image should be transferred to the ground. At this time, the type of camera corresponds to the usage environment,
That is, it was decided to use a CCD (charge-coupled device) camera as one that can sufficiently withstand the environment such as dust, water leakage, and humidity in the tunnel mine, and one that is easy to maintain. Further, as a result of various examinations of the place where the CCD camera is installed, it is preferable to attach the CCD camera to the head of the worker who operates the working device in the tunnel facing forward due to the following reasons. Reached the conclusion.

For example, in the case of a fixed-point camera mounted on the wall surface of a tunnel, the face of a face is not visible by the excavator during the operation of the excavator, and since there is a distance between the face of the face and the camera, dust is used to cut the face. I can't shoot clearly. On the other hand, in the case of a fixed-point camera installed on a heavy machine such as an excavator, it receives the vibration of the machine,
The captured image is distorted. In addition, it is not possible to arbitrarily photograph a desired place, whether it is mounted on a wall or installed on a machine. As described above, when the CCD camera is attached to the fixed position, the above-mentioned inconvenience occurs.

On the other hand, if the CCD camera is attached to the head of an operator who can freely move in the tunnel face, the above inconvenience of the fixed point camera can be solved. Further, by mounting the head portion of the worker toward the front, the CCD camera will face toward the line of sight of the worker. Therefore, it is possible to take a photograph of the face of the face that the worker is actually looking at, specifically, the face of the face where the worker is currently working or the place where he / she wants to work with a CCD camera. Transfer to
Even on the ground, it is possible to monitor the current status of face work and rock conditions.

As a result of repeated examinations as described above, the completed tunnel face work monitoring system of the present invention has the CCD camera directed forward to the head of the operator who operates the working device in the tunnel face. It is possible to monitor the work status and the rock condition of the tunnel face on the ground by transferring the image taken by the CCD camera to the monitor and displaying it by installing a monitor on the ground. It has a feature.

It is desirable that a voice communication means be provided so that voice communication can be performed between the worker and a person on the ground.

[0010]

[Function] If the worker turns his / her eyes toward the face part currently being worked on or the face part he / she wants to work from now on, that part is photographed by the CCD camera attached to the head of the worker, It is sent to the monitor on the ground and displayed. At this time, the working device is a tunnel excavator or a piercer that punches a blast hole, and even if dust is trapped in the tunnel, the image is taken from a distance very close to the face, so the image displayed on the monitor is a rock. It should be clear enough to judge the condition. Furthermore, since the CCD camera attached to the human head is not easily affected by the vibration of the work machine, the captured image is less likely to be disturbed.

The images sent one after another to the monitor are recorded, and the recorded image data is used as a material for judging the state of the cutting face. Therefore, it is possible to accurately determine the rock quality and hardness of the face, as compared with the conventional case in which the operator makes the determination based on the intuition. Further, since the work status can be constantly monitored, it is possible to give an appropriate instruction in response to a sudden change in the ground. On this occasion,
Since the worker and the person on the ground are looking at the same face, the two can communicate very well when performing voice communication.

[0012]

The present invention will be described in detail below with reference to the embodiment shown in FIG. In FIG. 1, 1 is a tunnel, 2 is a cutting face, 3 is a load header as a working device having a drilling head 3 ′ for making a blast hole in the cutting face 2 attached to the tip thereof, and 6 is an operation of the load header 3. You are a worker.

The worker 5 wears a helmet 6, and a small CCD camera 8 is attached to the front of the helmet 6. Since the CCD camera 8 is mounted so as to be located exactly on the front head of the worker, the photographing direction thereof coincides with the line of sight of the worker 5 indicated by the broken line. That is, when the worker 5 himself moves the whole head to move the line of sight, the lens of the CCD camera 8 also moves. The CCD camera 8 is connected by a cable 7 to a monitor 9 installed in the load header 3. The monitor 9 is used by the worker 5 himself to check whether or not the image pickup by the CCD camera 8 is properly performed.

A radio signal transmission device composed of a pair of parabolic antennas 10 and 11 is installed near the monitor 9 and near the tunnel entrance. The parabolic antennas 10 and 11 use a frequency band of 50 GHz and are 1 km.
Signal transmission can be performed between two remote points. The parabolic antenna 10 near the monitor 9 is connected to the monitor 9 by a cable, while the parabolic antenna 11 provided near the tunnel well is connected by a cable 13.
It is connected to a monitor 14 installed in a field office 12 on the ground. Therefore, the image photographed by the CCD camera 8 is displayed on the monitor 9 installed in the load header, and the parabolic antennas 10 and 1 are also displayed.
1 is transmitted in the tunnel, and is transmitted to the monitor 14 in the field office 12 on the ground by the cable 13 for display.

A vibration-proof rubber is used for the parabolic antenna 10 installed on the load header 3 to cope with machine vibration. Further, it is desirable that the parabolic antenna 11 installed near the wellhead is installed above the side wall of the tunnel so as not to disturb the work. Communication devices 15 and 16 are connected to the monitors 9 and 14, respectively, so that the worker 5 in the tunnel and a supervisor (not shown) in the field office 12 can talk with each other. The transmission of the audio signal at this time is also performed via the parabolic antennas 10 and 11.

By the way, since the CCD camera 8 is mounted above the eyes of the worker 5, the face portion that the worker 5 is actually seeing is photographed and displayed on the monitors 9 and 14. Therefore, the observer in the field office 12 can see the same face portion as the worker 5 at the same time, and can follow the progress of the work even on the ground.

The image sent to the monitor 14 in the field office 12 is recorded and used as data for objectively judging the state of the face 2. Therefore, the state of the rock can be determined more accurately. A supervisor in the office 12 exchanges opinions with the worker 5 and gives instructions to the worker 5 via the communication devices 15 and 16. At this time, both parties are looking at the same face part (one is actually, the other is through the monitor 14), so that the two people can communicate well.

In this embodiment, a punching machine for making a blast hole is used as the working device 3. However, the tunnel face work monitoring system of the present invention is applicable to other working machines even if the working device is a tunnel excavator. Even if there is, it can be applied similarly.

Although the CCD camera 8 is attached to the helmet 6, it may be attached directly to the head of the worker 5.

[0020]

As is apparent from the above, according to the present invention, the CCD camera is attached to the head of the worker who operates the working device in the tunnel face and the CCD camera is attached to the face of the worker. This is to photograph the face part in the direction in which the image was pointed, and display the photographed image on the ground monitor. By selecting the mounting position and mounting direction of the CCD camera, in which the CCD camera is mounted on the head of the worker in the forward direction, the lens of the CCD camera can be directed in the direction in which the worker's eyes are going. The same face can be seen at the same time as the ground guard. Therefore, even if you are on the ground, as if the worker is watching,
You can see where you are currently working and where you want to work, and you can always keep track of your work situation. And by constantly monitoring the work status such as excavation and drilling of the face part on the ground through the monitor, it is possible to quickly respond to sudden changes in the ground,
The safety of construction can be improved. Also, images sent one after another to the monitor on the ground can be recorded,
The recorded image data can be used as a material for determining the state of the face. Therefore, it is possible to objectively and accurately judge the rock quality and hardness of the face, as compared with the conventional case in which the operator makes a judgment based on the intuition.

When the worker and the ground supervisor use the communication means to perform voice communication, the viewpoints of the two are substantially the same as described above, so that the two persons can communicate very well.

Further, according to the present invention, the working device is a tunnel excavator or a blast hole puncher, and even if dust is trapped in the tunnel, the image is taken from a distance extremely close to the face, so that the monitor The image projected on will be clear enough to judge the condition of the rock. Furthermore, CC
Since the D camera is attached to the head of the worker, it is not easily affected by the vibration of the work machine, and the captured image is not disturbed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a tunnel face work monitoring system of the present invention.

[Explanation of symbols]

1 ... Tunnel, 2 ... Face, 3 ... Road header, 3 '... Drilling head, 5 ... Worker, 6 ... Helmet, 8 ... CCD camera, 9 ... Monitor, 10, 11 ... Parabolic antenna,
12 ... On-site office, 14 ... Monitor, 15, 16 ... Communication device.

Claims (3)

[Claims] 1. An image taken by the CCD camera, wherein a CCD camera is attached to a head of an operator who operates a working device in the tunnel in the tunnel face and a monitor is provided on the ground. A tunnel face work monitoring system, which monitors the work status and rock condition in the tunnel face section on the ground by transferring to the monitor for display. 2. A voice communication device is further provided so that voice communication can be performed between the worker and an observer on the ground.
Tunnel face work monitoring system described in. 3. The tunnel face work monitoring system according to claim 1, wherein the working device is a tunnel excavator or a punching machine for making a blast hole.