JPH11173078A - Mucking system in tunnel excavation by means of transferable conveyor and blasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mucking system in tunnel excavation by means of a transferable conveyor and blasting and excavation method by which a continuous mucking work can be realized, when a tunneling work by blasting and excavation method includes a mucking work by a conveyor and vehicles. SOLUTION: A transferable conveyor 6 in which a conveyor 6a supported by transferable bodies conveys muck is provided with discharging openings 21 corresponding to two or more muck-haulage vehicles (dump trucks 9) respectively disposed at the downstream end of the conveyor 6a and a changeover chute 23 changing over from one of the discharge openings 21 to the other by closing one of the discharge openings 21 by a damper 22, and a damper controller 25 controlling the changeover motion of the damper 22 in accordance with discharged volume of muck. And further, the mucking system is provided with the transferable conveyor 6 at the front part of a plurality of muck-haulage vehicles (dump trucks 9).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile conveyor and a tunnel for excavation by a blasting method, which are applied to a case where a tunnel excavation using a civil engineering technique includes a conveyor type and a vehicle type. Related to the delivery system.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, a conventional dumping system of this type includes a wheel loader 102, a mobile crusher 103, a mobile conveyor 104, and a dump truck as a plurality of shear transport vehicles from a face 101 side. 1
05, the belt feeder 106, and the continuous conveyance conveyor 107, and
8 with mobile crusher 1 by wheel loader 102
03, crushed to a uniform particle size, transported on a movable conveyor 104, loaded on a dump truck 105, transported to a belt feeder 106, and then transported on the belt feeder 106, and It is placed on the transport conveyor 107 and transported to the wellhead.

[0003] Therefore, according to this slip-out system, when shifting to the blasting operation after the slip-out, the mobile conveyor 104, the mobile crusher 103, and the wheel loader 102 can be retracted rearward by self-propelled operation. It is possible to smoothly and quickly switch between the slip-out operation and the blasting operation.

[0004] However, in this slip-out system, when the slip 108 becomes full in the dump truck 105, an empty dump truck 105 to be loaded next is loaded.
It is necessary to stop the operation of the mobile conveyor 104 and wait until the replacement is performed, and it is not possible to realize continuous and continuous discharge of the waste.

If a plurality of mobile crushers 103 and mobile conveyors 104 are provided in parallel and a sufficient number of dump trucks 105 are used,
Although continuous and continuous discharge of waste is possible, the cost is considerably increased due to an increase in expensive mobile crushers 103 and the like, and there is also a problem that a sufficient evacuation space for blasting operation cannot be secured. As a result, it is practically difficult to continuously and continuously discharge the waste.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention can realize continuous and continuous discharge of a shear in a case where a tunnel excavation by a blasting method includes a conveyor system and a vehicle system to perform a shearing operation. An object of the present invention is to provide a shearing system in tunnel excavation by a mobile conveyor and a blasting method.

[0007]

In other words, a mobile conveyor according to the present invention is a mobile conveyor having a conveyor for transporting the shears supported by a mobile body, which is disposed at a downstream end of the conveyor. A discharge chute is provided for each of two or more slip transport vehicles, and a switching chute is provided for closing any one of these discharge ports with a damper to switch the discharge port for discharging the slip. A damper control device for controlling the operation according to the amount of the discharged waste is provided.

On the other hand, a shearing system for tunnel excavation by a blasting method according to the present invention is characterized in that the movable conveyor is provided in front of a plurality of shear transport vehicles.

In such a technical means, from the viewpoint of shortening the traveling distance of the slip transport vehicle and minimizing the deterioration of the working environment in the mine due to exhaust gas, a continuous transport conveyor is provided behind the slip transport vehicle. It is preferable that a movable crusher is provided in front of the movable conveyor, from the viewpoint of securing a stable transport state by aligning the particle size of the waste.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the accompanying drawings. FIG. 1 is a schematic vertical sectional view showing a tunnel to which an embodiment of a movable conveyor according to the present invention is applied.

In FIG. 1, reference numeral 1 denotes a tunnel excavated by the blasting method, reference numeral 2 denotes a face which is the foremost part of the tunnel 1, reference numeral 3 denotes a shear generated by blasting of the face 2 by blasting, and reference numeral 4 denotes a shear. Reference numeral 5 denotes a wheel loader for transporting and loading the scrap 3 generated in the face 2 to the movable crusher 4, and reference numeral 6 denotes a particle crushed by the movable crusher 4. This is a movable conveyor for continuously transporting the aligned scraps 3 in the wellhead direction, wherein the conveyor 6a for transporting the shears is supported by a crawler traveling body 6b as a moving body.

Reference numeral 7 denotes a belt feeder for continuously feeding the slip at a constant rate, and reference numeral 8 denotes a fixed continuous feed for continuously transferring the slip 3 supplied by the belt feeder 7 to the wellhead. Conveyor, reference numeral 9 denotes a dump truck as a plurality of slip transport vehicles for transporting the slip 3 from the movable conveyor 6 to the belt feeder 7, and reference numeral 10 denotes a dump truck 9 which is installed in order to eliminate a change in direction due to safety requirements. The illustrated turntables (first turntable 10a, second turntable 10b) are shown.

Further, in FIGS. 1 and 2 (sectional views taken along the line AA), reference numeral 11 denotes an approach table (first type) on which the dump truck 9 is mounted on the turntable 10.
The approach platform 11a, the second approach platform 11b, the third approach platform 11c, and the fourth approach platform 11d). The dump truck 9 loaded with the slip 3 is rotated by 90 ° by the second turntable 10b, and then the loading platform is moved. The dump 3 is gradually dumped and the slip 3 is gradually lowered onto the belt feeder 7. The first turntable 1
0a is used only for the dump truck 9 to change direction, while the fourth approach table 11d is used only when the dump truck 9 needs to exit in the wellhead direction, such as after work is completed. Can be

In the movable conveyor 6 according to the present embodiment, the downstream end of the conveyor 6a is provided at the downstream end of FIG.
As shown in (BB cross-sectional view), the discharge ports 21 are provided at portions of the two dump trucks 9 (the first dump truck 9a and the second dump truck 9b) corresponding to the respective loading platforms.
(A first discharge port 21a and a second discharge port 21b), and one of these discharge ports 21 is connected to the damper 2
The outlet 21 for discharging the waste by closing at 2
Is rotatably supported by a shaft 24 provided integrally with the conveyor 6a.

The damper 22 has a sensor (not shown) for detecting the flow rate of the discharged waste 3 and automatically detects the position of the damper 22 only when the detected flow rate of the waste 3 reaches a predetermined amount. Damper 2 to switch
2 (a first damper control device 25) incorporating a microcomputer (not shown) for instructing
a, the second damper control device 25b) is connected.
Note that the sensor of the damper control device 25 is not limited to the type that detects the flow rate of the slip 3, and for example, the sensor
It may be of a type that detects the weight of the object.

Next, a slip-out system using a movable conveyor according to the present embodiment will be described with reference to FIGS. The description starts assuming that the free end of the damper 22 is in contact with the inner wall of the switching chute 23 and the portion related to the second discharge port 21b (the state of FIG. 3).

(A) Start of the scraping operation First, when the scrap 3 crushed by the blasting method on the face 2 is loaded on the movable crusher 4 by the wheel loader 5, the scrap 3 is moved by the movable crusher 4 After being crushed and uniformed in particle size,
It is placed on the upstream end of the conveyor 6a.

The waste 3 having the uniform grain size is placed on the conveyor 6a moving toward the wellhead and conveyed. When the supporting force of the conveyor 6a is lost at the downstream end, the waste 3 falls into the switching chute 23. To go.

Then, the slip 3 is directly transferred to the first discharge port 2.
1a, or falls into the area toward the first discharge port 21a after hitting the damper 22 once, and is discharged from the first discharge port 21a, and is discharged from the first discharge port 21a. It falls on the bed of dump truck 9a.
In this way, loading of the slip 3 on the first dump truck 9a is continuously performed, and in this case, the slip 3 is the first dump truck 9a.
The first outlet 2 passes through the area toward the outlet 21a.
During the discharge from the first discharge port 1a, the flow rate of the shear 3 is measured by the first damper control device 25a in a region toward the first discharge port 21a.

(B) Damper switching Then, when the flow rate of the shear 3 by the first damper control device 25a reaches a certain amount, the first damper control device 2
When the sensor built in 5a detects, the microcomputer linked to the sensor issues a command to the damper 22 to switch the position.

Then, the damper 2 which has been in contact with the inner wall of the switching chute 23 and the portion related to the second discharge port 21b
2 is switched in the direction of arrow C in the drawing, and abuts on the inner wall of the switching chute 23 and the portion related to the first discharge port 21a.

At this time, since the portion of the inner wall of the switching chute 23 related to the first discharge port 21a is inclined,
A situation in which the slip 3 is sandwiched between the portion and the free end of the damper 22 is avoided beforehand, and the switching of the damper 22 is achieved smoothly and quickly.

Even while the damper 22 is being switched, the switching chute 23 is moved from the conveyor 6a.
Are continuously dropped, and after the damper 22 is switched, the slip 3 that has fallen into the switching chute 23 falls directly into a region heading toward the second discharge port 21b. Or, once it hits the damper 22, it falls into a region heading for the second discharge port 21b, and then is discharged from the second discharge port 21b and falls on the bed of the second dump truck 9b. Become.

In this case, while the slip 3 passes through the region toward the second discharge port 21b and is discharged from the second discharge port 21b, the second damper is disposed within the region toward the second discharge port 21b. The flow rate of the slip 3 is measured by the control device 25b.

(C) Replacement of the dump truck The area leading to the first discharge port 21a is the damper 2
After being closed by 2 and switched, the slip 3
After confirming that the dump 3 has not been discharged from the discharge port 21a, the first dump truck 9a, which has finished loading the slip 3, is replaced with an empty dump truck. That is, the first dump truck 9a transports the slip 3 toward the wellhead, while the empty dump truck (not shown) includes the first turntable 10a, the first approach table 11a, and the second
After the direction is changed by the approach table 11b, the back traveling is performed to a portion corresponding to the first discharge port 21a.

(D) Conveyance by belt feeder and continuous conveyance conveyor First dump truck 9a loaded with shears 3
Gets on the first turntable 10b via the third approach table 11c, and
After rotating 90 ° together with the b to make the lateral direction facing the belt feeder 7 the rearward direction, and gradually dumping up the bed on which the shears 3 are placed, the shears 3 are gradually fed to the belt feeder according to their own weight. 7 fall.

Then, the shears 3 are continuously supplied to the continuous conveyor 8 at a constant rate by the belt feeder 7, and are continuously transported to the wellhead by the continuous conveyor 8. In addition, the first dump truck 9a, which has been completely emptied from the belt feeder 7, has been emptied by the second turntable 10b.
After rotating by an angle of 2 °, the direction of the face 2 is set to the forward direction, and the vehicle is started in the direction of the face 2 via the third approach table 11c in preparation for the next loading.

Therefore, according to the shearing system using the movable conveyor according to the present embodiment, the position of the damper is switched to the downstream end of the movable conveyor 6 in accordance with the flow rate of the discharged slurry 3. Thus, since the switching chute 23 capable of switching the discharge port is provided, in cooperation with the dump truck 9 arranged according to the discharge port,
It is possible to eliminate the need to stop the movement of the conveyor 6a, so that the dump 3 can be always loaded on the dump truck 9, so that a continuous and uninterrupted slip-out operation can be realized. .

[0029]

As described above, the mobile conveyor according to the present invention is arranged at the downstream end of the conveyor in a mobile conveyor in which a conveyor for transporting the waste is supported by a moving body. A discharge chute is provided for each of two or more slip transport vehicles, and a switching chute is provided for closing any one of these discharge ports with a damper to switch the discharge port for discharging the slip. Since a damper control device that controls the operation according to the amount of the discharged slip is provided, when the tunnel excavation by the blasting method includes the slipping operation by the conveyor method and the vehicle method, a continuous and continuous slip is performed. The feeding operation can be secured, so that a continuous and continuous slip feeding system can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view illustrating a tunnel to which a mobile conveyor according to an embodiment of the present invention is applied.

FIG. 2 is a schematic cross-sectional view showing a turntable and a belt feeder.

FIG. 3 is a schematic cross-sectional view showing one embodiment of the movable conveyor of the present invention.

FIG. 4 is a schematic vertical sectional view showing a tunnel to which an embodiment of a conventional movable conveyor is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tunnel 2 ... Face 3 ... Shredder 4 ... Mobile crusher 5 ... Wheel loader 6 ... Mobile conveyor 6a ... Conveyor 6b ... Crawler traveling body 7 ... Belt feeder 8 ... Continuous transport conveyor 9 ... Dump truck 10 ... Turntable 10a ... First turntable 10b Second turntable 11 Approach table 11a First approach table 11b Second approach table 11c Third approach table 11d Fourth approach table 21 Outlet 21a First outlet 21b Second discharge port 22 Damper 23 Switching chute 24 Shaft 25 Damper controller 25a First damper controller 25b Second damper controller 101 Face 102 Wheel loader 103 Mobile crusher 104 Mobile conveyor 105 ... dump truck 106 Belt feeder 107 ... continuous conveyor 108 ... shear C ... arrow

Claims (4)

[Claims] 1. A mobile conveyor comprising a conveyor for transporting a waste by a moving body, wherein a discharge port corresponding to each of two or more waste transport vehicles arranged is provided at a downstream end of the conveyor. A switching chute for switching one of the discharge ports for discharging the waste by closing any of these discharge ports with a damper, and controlling the switching operation of the damper in accordance with the amount of the discharged waste. A mobile conveyor, comprising a control device. 2. A mobile conveyor according to claim 1, wherein said mobile conveyor is provided in front of a plurality of shear transport vehicles.
Gap removal system for tunnel excavation by blasting method. 3. The system according to claim 2, further comprising a continuous conveyor provided behind the shear transport vehicle. 4. The system according to claim 2, further comprising a movable crusher in front of the movable conveyor.