JP2002303099A - Belt conveyor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct retraction for each blast and readily move a belt conveyor to a mucking position. SOLUTION: A movable conveyor apparatus 4 is provided slidably between a crusher 9 and a backup deck 11, and the movable conveyor apparatus 4 is moved back and forth by following the move of the crusher 9 accompanied by the mucking operation, and the blast operation of a face [K].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor system suitable for use in, for example, slipping a mountain tunnel.

[0002]

2. Description of the Related Art Conventionally, dump trucks are generally used as a method of discharging excavated debris in a mountain tunnel, but the work environment is deteriorated due to the exhaust of the truck and the generation of dust. In order to improve the main purpose, belt conveyors are increasingly used, especially in long tunnels.

[0003]

However, in the case of using such a belt conveyor, since the positions of the crusher and the start position of the belt conveyor where the shears are loaded are far from the face, the slips may be moved there. Shovel trucks and other heavy equipment.

[0004] In particular, in the case of blasting excavation, the position of the slip loading location is set at a distance of 100 mm from the face in order to avoid the influence of stepping stones.
m away. Therefore, excavation waste must be transported by heavy equipment for about 100 m from the face to the crusher, and the excavator traveling may deteriorate the working environment and increase the causes of vehicle disaster.

[0005] On the other hand, it is conceivable that the belt conveyor is extended so that it can be displaced without deteriorating the working environment. However, in this case, the belt conveyor must be removed during the evacuation operation. Also, a new problem arises in that the installation work at the time of work becomes troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a belt conveyor system capable of easily evacuating each time blasting and moving the belt conveyor to a slip-out position. Things.

[0007]

In order to achieve the above object, the belt conveyor system of the present invention is provided with a movable conveyor device slidably provided between a crusher and a backup deck, and is capable of performing a blasting operation of a face and a slipping operation. The movable conveyor device is moved forward and backward in accordance with the accompanying movement of the crusher. Therefore, according to the present invention, by setting the length of the movable conveyor device to, for example, about 100 m or more, which is a length that is not affected by the stepping stones at the time of blasting, it retreats at the time of blasting to avoid stepping stones. ,
After blasting, it moves forward to the position near the face, and the excavation waste can be delivered to the backup deck side via the crusher-movable conveyor device, so that the installation and removal work of the belt conveyor for each blasting becomes unnecessary, Streamlining work,
This is suitable for saving labor.

[0008] The movable conveyor device is suspended and supported by, for example, a plurality of chain blocks on guide rails arranged along the longitudinal direction in the tunnel pit. It is characterized by being stretched. Therefore, according to the present invention, the movable conveyor device can maintain a fixed length, and can always perform a scraping operation near the face.

[0009]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Figure 1
FIG. 2 is a side view and a sectional view showing the belt conveyor system according to the present invention.

In the figure, between the vicinity of the face [K] of the tunnel pit 1 and the pit side, a plurality of hangers 2 are suspended in a longitudinal state along the longitudinal direction on one side ceiling surface of the tunnel pit 1. ing. A guide rail 3 made of I-shaped steel is fixedly arranged at the lower part of each suspension 2, and a plurality of chain blocks 5 and an electric chain block 6 are movably arranged at the distal end position on the guide rail 3.

A movable conveyor device 4 is suspended below the chain blocks 5 and 6, and can reciprocate between a working position and a retreat position. FIG. 1 shows a state where the movable conveyor device 4 is located at a work position closest to the face [K].

The movable conveyor device 4 has a belt conveyor 8 disposed in a rectangular tube-shaped frame 7 whose tip is inclined downward, and drives the belt conveyor 8 by driving a motor. Although the part is omitted in the drawing, it is set to about 100 m or more in consideration of the evacuation position at the time of blasting and the like.

A caterpillar traveling type crusher 9 is disposed at the front end of the movable conveyor device 4, and a backup deck 11 serving as a starting end of the fixed conveyor device 10 is disposed at a lower rear end.

The crusher 9 crushes the excavated debris crushed by blasting to a small diameter, and discharges the crushed debris sequentially to the starting end side of the movable conveyor device 4 side. The movable conveyor device 4 conveys the excavation waste transferred from the crusher 9 to the rear via the belt conveyor 8 and discharges the excavation debris to the backup deck 11 side through the hopper 12 arranged above the backup deck 11 at the conveyance end position.

The waste delivered here is sequentially conveyed through a fixed conveyor device 10 toward a wellhead (not shown).

FIG. 3 shows in detail the attachment of the suspension 2 to the guide rail 3 and the chain block 5. In FIG. 3A, the suspension 2 is provided on the inner wall surface of the tunnel 1. It penetrates an iron plate support 14 as a primary lining and is temporarily fixed in the ground E via a lock bolt or an anchor bolt 15. Also, in FIG.
Is temporarily fixed to the support 14 by welding 16. In any case, these suspenders 2 and guide rails 3 are sequentially removed from the rear according to the progress of the excavation work, and are extended toward the front. After removal, the shoring 14 is also covered by a secondary lining 17 made of shotcrete or the like, as indicated by a two-dot chain line.

The chain block 5 includes a slide block 5b having a pair of rollers 5a which roll along both sides of the guide rail 3, and a lower end of the slide block 5b. 4 and a chain 5c connected to the frame 7. The electric chain block 6 includes a motor (not shown) that rotates forward and backward by remote control, and the rotating power causes the rollers to rotate forward and backward, thereby moving the movable conveyor device 4 back and forth.

Next, the working procedure in the above system will be described with reference to FIG. First, in (a), it is a preparation stage of the blasting operation, in which the movable conveyor device 4 and the crusher 9 are retracted to the retreat position, and piercing is performed by a piercing heavy machine such as a drill jumbo 18 to blast.

After the retreat of the drill jumbo 18, a blasting operation is performed as shown in FIG. At this time, since the crusher 9 and the movable conveyor device 4 are separated from each other by about 100 m or more, there is no risk of breakage due to flying stones, and sufficient safety can be ensured.

After the blasting operation, the crusher 9 is advanced and the electric chain block 6 is driven to rotate following the crusher 9 so that the movable conveyor device 4 also moves to the advanced position as shown in FIG. In addition, a heavy machine such as a backhoe 19 or an excavator for transferring excavated waste to the crusher also moves to the face [K] position, and delivers the collected crushed stones to the crusher 9. The shears are sequentially conveyed to the wellhead side in the order of the device 4-the backup deck 11-the fixed conveyor device 10. At this time, the working range of the backhoe 19 is almost one place as shown in the figure, and the crushed stone is collected and delivered while turning, so that the delivery work can be efficiently performed without significant movement, and There is no danger of the accompanying work environment deterioration and vehicle disaster.

Thereafter, by retracting the crusher 9, the movable conveyor device 4, and the backhoe 19, the work cycles shown in FIGS. In addition,
With the progress of the work, the suspension 2 and the guide rail 3 are extended to the front side in accordance with the progress of the face [K] every several work cycles, and the rear suspension 2 and the guide rail 3 are removed. The same work can be performed. As a matter of course, it is necessary to move the backup deck 11 to the forward position with the extension.

[0022]

As is apparent from the above description, according to the belt conveyor system of the present invention, it is possible to easily retract the belt every time it blasts and move the belt conveyor to the slip-out position, thereby streamlining work and saving labor. It is suitable for realizing.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a belt conveyor system according to the present invention.

FIG. 2 is a front sectional view taken along the line AA in FIG.

FIGS. 3A and 3B are partially enlarged views showing two examples of a portion B in FIG. 2;

4 (a) to 4 (c) are cross-sectional views for explaining an operation procedure in the system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel 3 Guide rail 4 Movable conveyor device 5 Chain block 6 Electric chain block 9 Crusher 10 Fixed conveyor device 11 Backup deck [K] Face

Continued on the front page (72) Inventor Kazuo Taguchi 3-1 Komon Tobata, Hakata-ku, Fukuoka, Fukuoka Prefecture F-term (reference) 2D054 AC20 BA22 DA02 DA37

Claims (3)

[Claims] 1. A movable conveyor device is provided between a crusher and a backup deck so as to be slidable, and the movable conveyor device is moved forward and backward in accordance with the blasting operation of the face and the movement of the crusher accompanying the slip-out operation. Characterized belt conveyor system. 2. The movable conveyor device is suspended and supported by a guide rail arranged along a longitudinal direction in a tunnel mine, and extends the guide rail in accordance with the progress of a face. 2. The belt conveyor system according to 1. 3. The hanging support is performed via a plurality of chain blocks.
A belt conveyor system according to item 1.