JPH09195665A - Tunnel drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect dust in a tunnel in simple structure by a tunnel drilling machine to drill an inclined shaft at a raise. SOLUTION: A dust collector 20 is provided inside and a dust exhausting port 20c of this dust collector 20 is connected to a debris chute 9 on a tunnel drilling machine 1 to drill an inclined shaft at a raise. Consequently, the dust sucked by the dust collector 20 is exhausted with drilled sediment and fluid to the rear side of the tunnel drilling machine 1 by the debris chute 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator, and more particularly to a tunnel excavator provided with a shear shoe for discharging excavated earth and sand together with a fluid.

[0002]

2. Description of the Related Art Conventionally, in a tunnel excavator for excavating an inclined shaft by cutting up, a shear shot is used to discharge excavated earth and sand out of the machine. This slip
The grate is configured such that a shear inlet is opened at the rear of the cutter head and the shear taken in from the shear inlet is discharged to the rear side of the tunnel. Then, excavation of the ground by the cutter head is performed while water is sprayed on the front surface of the cutter head and inside the cutter head, and the excavated earth and sand and water are sent into the slide chute through the shear inlet. At this time, since excavation is being carried out,
The excavated tunnel has a downward slope from the cutter head toward the rear of the tunnel. Therefore, the sediment and water in the shear chute are naturally discharged to the rear of the tunnel by utilizing this gradient.

Although the tunnel is excavated in this manner, a segment is constructed behind the main body of the tunnel excavator to prevent the ground from collapsing, and a spray material or the like is sprayed. At this time, since dust is generated in the tunnel, a dust collector is generally arranged inside the tunnel excavator.

The conventional dust collector is a stationary type and is installed at the rear part of the tunnel excavator body, and there are wet and dry types of dust collectors. Further, as the structure of this dust collector, a fan for collecting dust and a dust suction port are provided, and the dust collected by this dust suction port is
Known types include a type in which a pipe conveys the inside of the pipe to the outside of the tunnel, or a type in which a filter or water is used to capture the dust in a dust collector.

[0005]

However, since the structure of the conventional dust collector has a large volume, it is difficult to install it inside the tunnel or inside the tunnel excavator in order to avoid interference with other equipment. In addition, it may be an obstacle in working. Further, in the case of a fan that requires piping for discharge, it is necessary to perform piping to the rear of the tunnel, which may cause further problems in installation and work.

Further, there are problems in that maintenance costs of the filter in the dust collector are high, and in the case of a wet type, piping for water or the like of another system is required.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a tunnel excavating machine for excavating a slant shaft by cutting up so that dust can be absorbed in the tunnel with a simple structure. It is intended.

[0008]

In order to achieve the above-mentioned object, the tunnel excavator according to the present invention excavates an inclined shaft by cutting up, and at the same time excavates the excavated earth and sand with a fluid by a shearing shot. In a tunnel excavator that discharges from the rear of a cutter head to the rear side of the tunnel excavator, a dust collector is provided inside, and a dust discharge port of this dust collector is connected to the shear shoe. .

In the present invention, since the dust discharge port of the dust collector is connected to the shear shoe, the dust collected by the dust collector is discharged into the shear shoe. Since the excavated earth and sand flows in the shear shoe together with the fluid such as water, the dust is mixed with the earth and sand and discharged to the rear side of the tunnel excavator. Therefore, the dust collector does not need a separate discharge pipe, a filter for capturing dust in the dust collector, or water. That is, the basic structure of the dust collector is only a fan for sucking dust and piping from the suction port to the slide shoe. Since the distance from the suction port to the slide shoe is very short compared to the distance from the suction port to the rear of the tunnel, the piping itself is also shortened and the transport distance is also shortened. The fan of is also small. In this way, the number of parts of the device is reduced and the device structure is also reduced,
Easy to install in a narrow tunnel excavator.

In the present invention, it is preferable that a valve for preventing backflow is provided in the shearing shoe, closer to the cutter head than the connecting position of the dust collector. If such a valve is provided, dust will slide from the dust collector.
When the gas is exhausted into the cutter, this exhaust can prevent the sand and water in the slide chute from flowing back to the cutter head side.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, specific embodiments of the tunnel excavator according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a tunnel excavator according to an embodiment of the present invention, and FIG. 2 is a front view of the tunnel excavator. The tunnel excavator of the present embodiment excavates an inclined shaft by cutting up and will be described as being applied to a rock tunnel excavator with a shield, but it may or may not have a shield. .

In this tunnel excavator 1, a cylindrical skin plate 2 is provided in the excavator body, and a cutter head 4 is freely rotatable inside the front side of the skin plate 2 via a cutter head support 3. Is supported by. A large number of disc cutters 5 are mounted on the front surface of the face plate 4a of the cutter head 4, and a plurality of shear inlets 6 are arranged on the outer peripheral portion of the face plate 4a. A scraper 7 for scraping the excavation shear is arranged on the rear side in the rotation direction of the cutter head. In this way, the excavated shear excavated by the rotation of the cutter head 4 is guided to the outer peripheral portion of the cutter head 4, and is scraped by the scraper 7 at the outer peripheral portion and taken into the machine from the shear take-in port 6. After this, the excavated shear taken into the machine is guided from the hopper 8 disposed in the cutter head 4 to the rear shearing shoe 9, and by this shearing shoe 9, the rear pit bottom base. Is dropped and transported.

A main gripper 10a is supported behind the cutter head support 3 by a gripper frame 10, and between the cutter head support 3 and the gripper frame 10 an excavator main body is propelled. A large number of thrust jacks (lattice jacks) 11 are arranged. Further, the cutter head support 3 is provided with a front gripper 12 which is used for stabilizing the excavation during excavation and for supporting the cutter head support 3 against the tunnel tunnel wall at the end of excavation.

Further, the gripper frame 10 is provided with a plurality of first shield jacks 13 and a second shield rearward.
The shield jacks 14 are attached, and the tip ends of these shield jacks 13 and 14 are segmented into segments 15 respectively.
Alternatively, the self-weight of the excavator body and the propulsion reaction force are also supported by fixing the reaction force steel member 16 on the front end surface thereof. In addition, FIG. 3 is an example in which the reaction steel material 16 is assembled only at a lower position of the tunnel pit wall, and the second shield jack 14 is attached to the reaction steel material 16 at the time of excavation.
The load of the excavator body during excavation is supported by fixing the load on the excavator.

With such a construction, when excavating a favorable ground, in addition to the above-mentioned second shield jack 14, while the main gripper 10a applies a reaction force to the tunnel pit wall, the thrust jack 11 supports the cutter head. The excavation is performed by transmitting the propulsive force to 3 and rotating the cutter head 4. On the other hand, when excavating the soft ground where the segments 15 need to be assembled, the excavation is performed by further operating the first shield jack 13 while applying a reaction force to the segments 15.

In this way, when the excavator body advances while excavating, the segments are assembled or the ground is exposed after the excavator body passes. If the segments are not assembled, rock bolts may be driven or sprayed to reinforce the ground.

In any case, dust is often generated during work in the tunnel. Therefore, the dust is removed in order to maintain the safety of the worker and secure the field of view.

In this embodiment, as shown in FIG. 1, the dust collector 20 is attached to the gripper frame 10 at a substantially central portion in the skin plate 2. The dust suction device 20 includes a fan 20a for sucking dust, a dust suction port 20b for taking in the dust, and a dust discharge port 20c for discharging the taken dust. Here, the dust suction port 20b is opened toward the rear of the excavator body where dust is likely to be generated, and is connected to the dust discharge port 20c of the shift shoe 9.

According to such a dust collector 20, the generated dust is immediately sucked from the dust suction port 20b. Since the dust discharge port 20c of the dust collector 20 is connected to the shift shoe 9, the dust sucked and collected by the fan 20a is discharged into the shear shoe 9. Since the excavated earth and sand flows in the shear short 9 together with a fluid such as water, the earth and sand and the like are mixed with dust and discharged by the shear chute 9 to the rear side of the tunnel.

The slide shoe 9 is provided on the cutter head 4 side with respect to the connection position of the dust discharge port 20c of the dust collector 20.
Valve for backflow prevention (eg butterfly valve,
A check valve (not shown) or the like may be provided. If such a valve is provided, when dust is exhausted from the dust collector 20 into the shear shoe 9, the exhaust gas causes the shear shoe to slip.
It is possible to prevent backflow of the earth and sand, water, etc. in the blade 9 to the cutter head 4 side.

In this embodiment, the fan 20a and the dust suction port 20b of the dust suction device 20 are provided in the skin plate 2 at substantially the center thereof.
The installation positions of 0a and the dust suction port 20b can be appropriately selected depending on the internal structure of the excavator body and the dust generation state. In addition, the fan 20a and the dust suction port 2
0b may be fixed to the structure of the excavator body as in the present embodiment, or may be movable.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a tunnel excavator according to an embodiment of the present invention.

FIG. 2 is a front view of a tunnel excavator according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 1 tunnel excavator 2 skin plate 4 cutter head 9 shear chute 20 dust collector 20a fan 20b dust inlet 20c dust outlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumio Terada, 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura-gumi Co., Ltd. Incorporated company Okumura Gumi (72) Inventor Shinichi Terada 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka Factory (72) Toshihiro Yamazaki 3-1-1 Ueno, Hirakata-shi, Osaka Matsu Factory Osaka Factory

Claims (2)

[Claims] 1. The excavation of an inclined shaft by cutting up,
In a tunnel excavator that discharges the excavated earth and sand with a fluid from the rear of the cutter head to the rear side of the tunnel excavator by a shear shot, a dust collector is provided inside, and the dust discharge port of this dust collector is used as the slide shoe. A tunnel excavator characterized by being connected to. 2. A tunnel excavator, characterized in that a valve for preventing backflow is provided in the shear shoe closer to the cutter head than the connection position of the dust collector.