Belt conveyor steel car and excavated muck conveying method

Abstract

To solve the problems of the prior art, that is, to provide a belt conveyor steel car and a method for conveying excavated muck using the belt conveyor steel car, which can carry out excavated muck more efficiently than the prior art when blasting and excavating a tunnel with a small section.SOLUTION: A belt conveyor steel car of the present invention is a steel car that can be loaded with excavated muck generated by tunnel excavation and can move on a conveying rail, and comprises a muck container capable of containing excavated muck, a conveyor rail, and a moving belt conveyor. Among these, the moving belt conveyor can slide on conveyor rails. The excavated muck placed on the moving belt conveyor is conveyed by the moving belt conveyor and thrown into the muck container from one end of the moving belt conveyor.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a technology for transporting rock blocks, rock crushing materials, soil and sand (hereinafter collectively referred to as "excavation debris") generated by tunnel excavation using steel cars, and more specifically, to a transportation technology that enables the excavation debris to be loaded onto two or more steel cars for transportation. [Background technology]

[0002] Recently, power generation methods using renewable energy have been attracting attention because of their ability to reduce greenhouse gas emissions. Renewable energy is literally energy that can be reproduced, such as solar, small and medium-sized hydroelectric, wind, geothermal, and woody biomass. Because they reduce greenhouse gas emissions and can be produced domestically, they are seen as a promising form of low-carbon energy.

[0003] Among these, small-scale hydroelectric power plants with an output of 10,000 kW or less can generate electricity with relatively simple equipment, and unlike solar power generation, can generate electricity day or night.Furthermore, because they are often locally based businesses, they can lead to local revitalization such as job creation, and other benefits.Demand is expected to increase in the future, and in fact, the construction of headrace tunnels for small-scale hydroelectric power plants has increased sharply in recent years. Headrace tunnels generally have a small cross section, and although excavation using TBMs (Tunnel Boring Machines) may be used depending on the strength of the ground, in most cases they are excavated using the New Austrian Tunneling Method (NATM), which involves blasting.

[0004] Tunnel excavation using NATM involves repeatedly carrying out a series of tasks (cycles) such as drilling holes for loading explosives, blasting, transporting the excavated waste, and constructing supports (sprayed concrete, steel supports, rock bolts). This means that various tasks are carried out in sequence near the tunnel face, and because different machines are used for each task, machine switching is unavoidable. There are also several methods for transporting the excavated waste generated by blasting outside the tunnel, including the "tire type," in which the excavated waste is loaded onto dump trucks or similar vehicles and transported; the "belt conveyor type," in which the excavated waste is transported by a continuous belt conveyor system installed inside the tunnel; and the "rail type," in which the excavated waste is transported using rails also laid inside the tunnel.

[0005] When excavating a small-section tunnel such as a headrace tunnel, it is of course necessary to work in a small (narrow) space, so the machines used must be small. Therefore, if a tire-type transport system is used, the amount of excavated waste that can be loaded per vehicle is limited, which significantly reduces work efficiency. In addition, if a belt conveyor system is used, a crusher (mobile crusher) is required to crush the excavated waste generated by blasting into small pieces, but it is impossible to install this crusher in most small-section tunnels, and even if it were possible to install it, it would be inconvenient that the excavated waste cannot be fed into the crusher. Therefore, rail-type transport is the mainstream for small-section tunnels, and a locomotive (battery locomotive) pulls a car carrying the excavated waste on rails (hereinafter referred to as a "waste car") to transport the excavated waste to the tunnel entrance. In addition, in small-section tunnels, due to space constraints, it is necessary to lay a single rail (so-called single track), and machines used for other work may also use a type that moves on the same rail.

[0006] In the conventional rail-type transport method, the excavated waste was transported by a combination of one steel car and one locomotive. More specifically, one steel car placed on the face side was coupled to a locomotive placed on the tunnel mouth side, and when this steel car was loaded with excavated waste, the combination of the steel car and the locomotive (hereinafter referred to as the "transport vehicle") moved toward the tunnel mouth. This is because the transport length (reach length) of the excavated waste became shorter as a result of the miniaturization of excavated waste loaders (such as shaft loaders), and when two or more waste cars were coupled, the excavated waste would not reach the waste car placed on the tunnel mouth side. In addition, when the tunnel excavation length becomes long, the waiting time (so to speak, idle time) at the tunnel face side becomes long with one set of transport vehicles, so in this case two or more sets of transport vehicles are introduced.

[0007] It is extremely inefficient to have one set of vehicles travel to the tunnel face, load and transport the excavation waste, and then have a different vehicle take turns traveling to the tunnel face, and so on. If it takes time to transport the excavation waste, it will push up the cycle time of tunnel excavation, which will in turn lengthen the time required for tunnel construction. In addition, since different vehicles need to pass each other inside the tunnel, double track sections must be provided at regular intervals (about 300m) inside the tunnel. These double track sections are areas where the tunnel cross section has been widened, and are indirect construction that is directly necessary for the original purpose (e.g., water conveyance), and it is desirable to reduce the cost and time required for their construction as much as possible.

[0008] Thus, problems have been pointed out with the rail-type transport method for small-section tunnels, such as inefficient excavation waste transport work and the construction of double-track sections (widened sections), and technology to solve these problems has been eagerly awaited. Therefore, Patent Document 1 proposes a technology in which a conveyor for transporting excavation waste is supported by a conveyor support cart and a waste cart, and the conveyor support cart extends and retracts in response to the movement of the waste cart. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2001-152789 A Summary of the Invention [Problem to be solved by the invention]

[0010] According to the technology disclosed in Patent Document 1, the excavated waste can be transported by multiple waste cars coupled to one locomotive, and therefore excavated waste transportation work can be performed more efficiently than with conventional technology. However, the technology in Patent Document 1 requires a permanent conveyor near the tunnel face, and a telescopic conveyor support car must also be permanently installed near the tunnel face. In other words, although this can be implemented in tunnel excavation using a TBM, which is the premise of Patent Document 1, it is extremely difficult to adopt this technology in blast excavation, where work machines are frequently replaced near the tunnel face.

[0011] The object of the present invention is to solve the problems associated with the prior art, namely, to provide a belt conveyor steel car that can transport excavated debris more efficiently than the prior art when blasting small cross-section tunnels, and a method of transporting excavated debris using the same. [Means for solving the problem]

[0012] The present invention was made with a focus on the fact that by providing a sliding belt conveyor on a tailings car, it is possible for a locomotive to tow two or more tailings cars, and is an invention based on an unprecedented idea.

[0013] The belt conveyor steel car of the present invention is a steel car that can carry excavation debris generated by tunnel excavation and move on a conveyor rail, and is a debris container that can store the excavation debris. And move on It is equipped with a moving belt conveyor. Move Moving belt conveyor is It is installed on the top of the waste storage body and runs in the direction of the tunnel axis. The excavated waste placed on the moving belt conveyor is transported by the moving belt conveyor and is dumped into the waste container from one end of the moving belt conveyor.

[0014] The belt conveyor steel car of the present invention can also be installed so that the moving belt conveyor slopes upward toward the entrance of the mine.

[0015] The excavation debris transport method of the present invention is a method for transporting excavation debris generated by tunnel excavation to the tunnel entrance side by a transport device connected in the order of a locomotive, a belt conveyor steel car of the present invention, and a regular steel car from the tunnel entrance side to the tunnel face side on a transport rail, and the method includes a belt conveyor forward step, a belt conveyor steel car input step, a belt conveyor retract step, and a regular steel car input step. In the belt conveyor forward step, the moving belt conveyor is moved to the tunnel face side. In the belt conveyor steel car input step, the excavation debris is placed on the moving belt conveyor by an excavation debris loader, so that the moving belt conveyor transports the excavation debris to the tunnel entrance side, and the excavation debris is input from the tunnel entrance side end of the moving belt conveyor into the debris container of the belt conveyor steel car. In the belt conveyor retract step, the moving belt conveyor is moved to the tunnel entrance side, and in the regular steel car input step, the excavation debris is input into the debris container of the regular steel car by the excavation debris loader. The locomotive then moves along the transport rails toward the mine entrance, pulling the conveyor belt steel cars and ordinary steel cars loaded with excavated waste.

[0016] The excavated debris transportation method of the present invention comprises the steps of: The belt conveyor steel car, which has been uncoupled from the ordinary steel car, moves toward the mine mouth and dumps the excavated waste into the waste container. It can also be a method.

[0017] The excavated debris transport method of the present invention can also be a method using a transport device comprising two or more belt conveyor steel cars. In this case, the belt conveyor forward step, the belt conveyor steel car introduction step, and the belt conveyor retreat step are repeated for each belt conveyor steel car. In the belt conveyor steel car introduction step for the second or subsequent belt conveyor steel cars counting from the face side, the excavated debris is transferred from the moving belt conveyor of the other belt conveyor steel cars on the face side to the moving belt conveyor of the belt conveyor steel car. Effect of the Invention

[0018] The belt conveyor steel car and excavated debris transport method of the present invention have the following effects. (1) By achieving efficient waste removal operations, it is possible to improve the cycle time of the entire tunnel excavation work, and ultimately to shorten the period required for tunnel construction. (2) Since the opportunities for different conveying bodies to pass each other inside the tunnel are reduced compared to the past, the spacing between double-track sections (widened sections) can be increased, meaning that the number of double-track sections that need to be constructed can be reduced. (3) The amount of work required to couple and uncouple wagons is reduced compared to conventional methods, reducing the risk of work-related accidents at construction sites. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a side view showing a schematic diagram of a situation in which excavated waste is transported toward the wellhead using the belt conveyor steel car of the present invention. [Diagram 2] FIG. 2A is a side view showing a schematic diagram of a belt conveyor steel car of the present invention, FIG. 2B is a plan view showing a schematic diagram of a belt conveyor steel car of the present invention, and FIG. 2C is a front view showing a schematic diagram of a belt conveyor steel car of the present invention. [Diagram 3] FIG. 2A is a side view showing a schematic of a moving belt conveyor sliding forward, and FIG. 2B is a side view showing a schematic of a moving belt conveyor sliding backward. [Figure 4] FIG. 1A is a side view showing a schematic diagram of a moving belt conveyor arranged at an angle sliding forward, and FIG. 1B is a side view showing a schematic diagram of a moving belt conveyor arranged at an angle sliding backward. [Diagram 5] FIG. 1 is a side view showing a moving conveyor belt that is bent in the middle when viewed in the cross-sectional axial direction. [Figure 6] FIG. 13 is a side view showing a schematic diagram of a situation in which the excavated debris inside the debris container is discharged by overturning the debris container. [Figure 7] 1A is a side view showing a state in which the movable side wall and the moving conveyor belt interfere with each other, FIG. 1B is a plan view showing a rubbish storage body provided with guide rails, FIG. 1C is a side view showing a state in which the moving conveyor belt is slid away from the movable side wall, and FIG. 1D is a side view showing a state in which the rubbish storage body has tipped over with the moving conveyor belt moved away from the movable side wall. [Figure 8] FIG. 2 is a flow chart showing the flow of the main steps of the excavated debris transportation method of the present invention. [Figure 9] A step diagram showing the main steps up to dumping excavated debris into the debris storage area of ​​a belt conveyor steel car. [Figure 10] A step diagram showing the main steps up to discharging the excavated debris from the debris storage compartment of the belt conveyor steel car. [Figure 11] A side view showing the situation in which excavated tailings are transported from the mine mouth to the face using a transport device connected in the following order: a locomotive, two steel conveyor cars, and a regular steel car. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] An embodiment of the belt conveyor steel car and excavated debris transport method of the present invention will be described with reference to the drawings.

[0021] FIG. 1 is a side view showing a schematic diagram of a state in which the excavation waste generated by tunnel excavation is transported toward the tunnel mouth using the belt conveyor steel car 100 of the present invention. As shown in this figure, the belt conveyor steel car 100 of the present invention is equipped with a belt conveyor on its upper part. Since this belt conveyor can slide in the tunnel axial direction (the direction connecting the tunnel mouth and the tunnel face), for convenience, it is referred to as a "moving belt conveyor 130" here. Then, a series of machines (hereinafter referred to as "transportation device") connected in this order from the tunnel mouth side to the tunnel face side, including the locomotive BL, the belt conveyor steel car 100, and a conventionally used ordinary steel car (hereinafter referred to as "ordinary steel car SC"), travels on the transport rail (rail) RL to transport the excavation waste toward the tunnel mouth. More specifically, the excavated debris loader SL (such as a shaft loader) loads the excavated debris onto the belt conveyor steel cars 100 and ordinary steel cars SC, and when they are roughly full, the locomotive BL moves under its own power toward the mine entrance; in other words, the excavated debris on the belt conveyor steel cars 100 and ordinary steel cars SC, pulled by the locomotive BL, is transported toward the mine entrance.

[0022] 1.Conveyor belt steel car First, the belt conveyor steel car 100 of the present invention will be described in detail. The excavated debris transport method of the present invention is a method of transporting excavated debris using the belt conveyor steel car 100 of the present invention. Therefore, the belt conveyor steel car 100 of the present invention will be described first, and then the excavated debris transport method of the present invention will be described.

[0023] 2 is a schematic diagram of the belt conveyor steel car 100 of the present invention, in which (a) is a side view of the belt conveyor steel car 100 in an axial direction perpendicular to the tunnel axial direction (hereinafter referred to as the "transverse axial direction"), (b) is a plan view of the belt conveyor steel car 100 from above, and (c) is a front view of the belt conveyor steel car 100 in the tunnel axial direction. Note that in FIG. 2(b), the moving belt conveyor 130 is omitted for convenience.

[0024] As shown in Fig. 2, the belt conveyor steel car 100 is composed of a steel car section 110, a conveyor rail 120, and a movable belt conveyor 130. The conveyor rail 120 is fixed to the top of the steel car section 110, and the movable belt conveyor 130 is installed on the conveyor rail 120 so that it can slide along the conveyor rail 120. The steel car section 110 is a car body including a waste container 111 that can store excavated waste, wheels 112 for moving on the transport rail RL, etc., and can use a conventional ordinary steel car (i.e., a normal steel car SC). The movable belt conveyor 130 is composed of a pulley on the wellhead side and a pulley on the face side, an endless belt that runs between these pulleys, a power means for running the endless belt, etc., and can transport the excavated waste placed on the endless belt by the excavated waste loader SL toward the wellhead.

[0025] As shown in Fig. 2(a), the conveyor rail 120 is arranged so as to be approximately horizontal (including horizontal) and in the tunnel axial direction, and is designed with dimensions (length) that allow it to extend beyond the front end (face end) of the steel car section 110. Of course, it may also be sized to extend beyond both the front and rear ends (mouth end) of the car section 110. This conveyor rail 120 is fixed to the top of the steel car section 110, and therefore the conveyor rail 120 does not move relative to the belt conveyor steel car 100.

[0026] On the other hand, the moving belt conveyor 130 is arranged so as to be in the tunnel axis direction, and is installed on the conveyor rail 120 so as to be able to slide along the conveyor rail 120 (i.e., in the tunnel axis direction). In FIG. 2(c), the moving belt conveyor 130 is sandwiched between two L-shaped (sectional) conveyor rails 120, and the movement of the moving belt conveyor 130 in the transverse axis direction (left and right direction in the figure) is restricted, but the movement in the tunnel axis direction (depth direction in the figure) is free. Note that, as long as the moving belt conveyor 130 has a structure that allows it to slide along the conveyor rail 120, the moving belt conveyor 130 can be installed on the conveyor rail 120 using various conventional methods regardless of the structure shown in FIG. 2(c). However, if the moving belt conveyor 130 slides unlimitedly, it will come off the conveyor rail 120, so it is advisable to provide a stopper on the conveyor rail 120 to prevent it from coming off. Furthermore, as will be described later, when the muck container 111 is overturned, there is a risk that the moving belt conveyor 130 may come off the conveyor rail 120, so it is advisable to provide a structure that also restricts the upward movement of the moving belt conveyor 130.

[0027] The moving belt conveyor 130 can be a mechanical type that uses a power such as a hydraulic jack or an electric motor to slide and move, or a manual type that an operator slides and moves using a chain block or the like. Alternatively, the moving belt conveyor 130 can be equipped with power and wheels, and a self-propelled type in which the wheels rotated by the power run on the conveyor rail 120 can be adopted. The moving belt conveyor 130 has been described as being capable of sliding along the conveyor rail 120, but it can also move in both directions, that is, the face side and the mouth side. For convenience, the sliding movement to the face side will be referred to as "forward sliding" and the sliding movement to the mouth side will be referred to as "reverse sliding". FIG. 3(a) is a side view that shows a schematic of the moving belt conveyor 130 that slides forward, and FIG. 3(b) is a side view that shows a schematic of the moving belt conveyor 130 that slides backward.

[0028] In Fig. 2 and Fig. 3, the moving belt conveyor 130 is arranged substantially horizontally (including horizontally) and is configured to slide while maintaining the substantially horizontal posture, but the moving belt conveyor 130 may be arranged at an incline. Fig. 4(a) is a side view showing a state where the moving belt conveyor 130 arranged at an incline slides forward, and Fig. 3(b) is a side view showing a state where the moving belt conveyor 130 arranged at an incline slides backward. In this case, as shown in Fig. 4, the moving belt conveyor 130 may be arranged so that it has an upward gradient toward the entrance side (a downward gradient toward the face side). Note that although the moving belt conveyor 130 is inclined in the vertical plane, it is arranged so that the axial direction projected on the horizontal plane is the tunnel axial direction.

[0029] If the conveyor rail 120 were also arranged at an incline corresponding to the moving belt conveyor 130, when the moving belt conveyor 130 slides forward, it would descend close to the ground, and conversely, when it slides backward, it would rise up close to the top of the tunnel. For this reason, as shown in Fig. 4, it is advisable to arrange the conveyor rail 120 approximately horizontally (including horizontally) and then use the moving body 140. This moving body 140 has a wedge-shaped shape when viewed in the transverse axis direction, and has a shape that has an included angle formed by the arrangement posture of the moving belt conveyor 130 (i.e., the inclined posture) and the arrangement posture of the conveyor rail 120 (i.e., the approximately horizontal posture).

[0030] Moreover, the moving body 140 is installed on the conveyor rail 120 so as to be able to slide (forward and backward) along the conveyor rail 120 (i.e., in the tunnel axial direction). The structure by which the moving body 140 slides can be the same sliding structure (mechanical, human-powered, or self-propelled) as the moving belt conveyor 130. The moving belt conveyor 130 is fixed to the moving body 140. That is, the moving belt conveyor 130 is indirectly installed on the conveyor rail 120 via the moving body 140, so to speak, and thus the moving belt conveyor 130 also slides together with the sliding movement of the moving body 140.

[0031] In Fig. 3 and Fig. 4, the moving belt conveyor 130 is linear (as viewed in the transverse axis direction), but it may be bent in the middle. Fig. 5 is a side view showing a moving belt conveyor 130 that is bent in the middle when viewed in the transverse axis direction. As shown in this figure, when the moving belt conveyor 130 is bent in the middle, the face side is inclined and the mouth side is approximately horizontal. However, the inclination should be such that the inclination is an upward gradient toward the mouth side (a downward gradient toward the face side). In other words, the moving belt conveyor 130 shown in Fig. 3 is arranged on the mouth side, and the moving belt conveyor 130 shown in Fig. 4 is arranged on the face side, and these are connected to form the moving belt conveyor 130.

[0032] When the belt conveyor steel car 100 or the ordinary steel car SC is transported to a predetermined location (for example, a soil dump outside the mine), the excavated debris stored in the debris container 111 is discharged. At this time, the debris container 111 is usually turned over as shown in FIG. 6 to discharge the excavated debris inside. A movable side wall 113 is provided on one side of the debris container 111 (the left side in the figure), and functions as a closing lid so that the excavated debris inside does not spill out when the debris container 111 is not rotated. When the debris container 111 is turned over (rotated) toward the movable side wall 113 (counterclockwise in the figure), the movable side wall 113 moves slightly upward, which is different from the behavior of the debris container 111. As a result, the closing lid function of the movable side wall 113 is released, that is, the side where the movable side wall 113 was located becomes an opening, and the excavated debris inside the debris container 111 is discharged.

[0033] However, in the belt conveyor steel car 100 of the present invention, the conveyor rail 120 and the moving belt conveyor 130 are arranged on the upper part of the rubbish container 111, and when the rubbish container 111 is turned over, there is a risk of interference between the movable side wall 113 and the moving belt conveyor 130 as shown in FIG. 7(a). In order to avoid this interference, it is preferable to provide a guide rail 150 on the upper part of the rubbish container 111. This guide rail 150 is a rail (rail) that guides the conveyor rail 120 in the transverse axis direction, and is therefore arranged so as to be approximately perpendicular (including perpendicular) to the conveyor rail 120. In other words, by sliding the moving belt conveyor 130 along the guide rail 150, the moving belt conveyor 130 is moved away from the movable side wall 113, thereby avoiding mutual interference.

[0034] 7(b), the guide rail 150 may be configured such that an outer guide rail 151 and an inner guide rail 152 are installed on the face side (left side in the figure) of the waste container 111, and further, an outer guide rail 151 and an inner guide rail 152 are installed on the mouth side (right side in the figure) of the waste container 111. If a protrusion provided on the underside of the conveyor rail 120 is inserted between the outer guide rail 151 and the inner guide rail 152, the protrusion is guided in the transverse axis direction by the guide rail 150 (the outer guide rail 151 and the inner guide rail 152), that is, the conveyor rail 120 and the moving belt conveyor 130 placed thereon are guided in the transverse axis direction. Note that the guide rail 150 is installed to avoid interference between the movable side wall 113 and the moving belt conveyor 130, so that the arrangement and dimensions of the guide rail 150 may be designed so that the moving belt conveyor 130 in a fixed position can slide away from the movable side wall 113.

[0035] When the guide rail 150 is installed in the waste container 111, the excavated waste inside the waste container 111 may be discharged in the following procedure. When the belt conveyor steel car 100 is transported to a predetermined location, the conveyor rail 120 and the moving belt conveyor 130 are slid along the guide rail 150 in a direction away from the movable side wall 113, as shown in FIG. 7(c). Then, when the moving belt conveyor 130 is sufficiently away from the movable side wall 113, the waste container 111 is turned over, as shown in FIG. 7(d), to discharge the excavated waste inside. At this time, a stopper for fixing the moving belt conveyor 130 to the guide rail 150 may be provided so that the moving belt conveyor 130 does not move in the direction of the movable side wall 113.

[0036] 2. Method of transporting excavated debris Next, the excavated debris transport method of the present invention will be described. The excavated debris transport method of the present invention is a method of transporting excavated debris using the belt conveyor steel car 100 described so far. Therefore, we will avoid any overlapping explanation with the explanation of the belt conveyor steel car 100, and only explain the details unique to the excavated debris transport method of the present invention. In other words, the details not described here are the same as those explained in "1. Belt conveyor steel car".

[0037] Fig. 8 is a flow chart showing the flow of the main steps of the excavation debris transportation method of the present invention, Fig. 9 is a step diagram showing the main steps until the excavation debris is put into the debris container 111 of the belt conveyor steel car 100, and Fig. 10 is a step diagram showing the main steps until the excavation debris is discharged from the debris container 111 of the belt conveyor steel car 100. As shown in Fig. 9(a), when the transportation device connected in the order of the locomotive BL, the belt conveyor steel car 100, and the ordinary steel car SC from the mouth side to the face side reaches near the face (Step 201 in Fig. 8), the belt conveyor steel car 100 and the ordinary steel car SC transportation are released (Step 202 in Fig. 8). Then, as shown in Fig. 9(b), the locomotive BL moves toward the face side by itself, bringing the belt conveyor steel car 100 closer to the ordinary steel car SC (Step 203 in Fig. 8). When the belt conveyor steel car 100 comes close enough to the ordinary steel car SC, the moving belt conveyor 130 of the belt conveyor steel car 100 is slid forward as shown in FIG. 9(c) (Step 204 in FIG. 8).

[0038] When the moving belt conveyor 130 is slid forward, the excavated debris is dumped into the debris container 111 of the belt conveyor steel car 100 (Step 205 in FIG. 8). More specifically, when the excavated debris loader SL places the excavated debris on the moving belt conveyor 130, the endless belt of the moving belt conveyor 130 rotates (clockwise in the figure), transporting the excavated debris to the belt conveyor steel car 100 side (i.e., the wellhead side), and the excavated debris that has moved to the wellhead end of the moving belt conveyor 130 is dumped into the debris container 111. At this time, it is preferable to dump the excavated debris while gradually moving the belt conveyor steel car 100 toward the wellhead so that the excavated debris is loaded uniformly (without bias) in the debris container 111. The belt conveyor steel car 100 shown in FIG. 9(d) has moved a considerable distance toward the wellhead side since a certain amount of time has passed since the start of dumping the excavated debris.

[0039] When the waste container 111 of the belt conveyor steel car 100 is almost fully loaded with excavated waste, the moving belt conveyor 130 is slid backward as shown in FIG. 10(e) (Step 206 in FIG. 8). Then, as shown in FIG. 10(f), the locomotive BL moves the belt conveyor steel car 100 toward the face by itself (Step 207 in FIG. 8), and the belt conveyor steel car 100 and the ordinary steel car SC transport are connected (Step 208 in FIG. 8). When the belt conveyor steel car 100 and the ordinary steel car SC transport are connected (or in parallel with the connection between the belt conveyor steel car 100 and the ordinary steel car SC transport), the excavated waste is dumped into the waste container of the ordinary steel car SC (Step 209 in FIG. 8). More specifically, the excavated waste loader SL dumps the excavated waste directly into the waste container of the ordinary steel car SC. At this time, it is advisable to gradually move the ordinary steel car SC toward the minehead while dumping the excavated debris so that the excavated debris is loaded evenly (without uneven distribution) inside the debris container. The ordinary steel car SC shown in Figure 10(g) has moved a considerable distance toward the minehead since a certain amount of time has passed since dumping of the excavated debris began.

[0040] When the waste container 111 of the belt conveyor steel car 100 is almost fully loaded with excavated waste, and the waste container of the ordinary steel car SC is also almost fully loaded with excavated waste, the transport device moves to a predetermined location (for example, a soil dump outside the mine) (Step 210 in FIG. 8). Figure 10(h) As shown in Fig. 8, the excavated debris is discharged from the debris container 111 of the belt conveyor steel car 100, and the excavated debris is also discharged from the debris container of the ordinary steel car SC0 (Step 211 in Fig. 8). When discharging the excavated debris from the debris container 111 of the belt conveyor steel car 100, as described above, the conveyor rail 120 and the movable belt conveyor 130 may be slid along the guide rail 150 in a direction away from the movable side wall 113, and then the debris container 111 may be overturned.

[0041] Up to this point, an example of a transport device in which one belt conveyor steel car 100 is connected has been described, but the excavation debris transport method of the present invention can also be a method of transporting excavation debris using a transport device in which two or more belt conveyor steel cars 100 are connected. Figure 11 is a side view that shows a schematic diagram of a situation in which excavation debris is transported toward the mine mouth using a transport device in which a locomotive BL, two belt conveyor steel cars 100, and a normal steel car SC are connected in this order from the mine mouth side toward the face side. The procedure for transporting excavation debris using the transport device shown in this figure will be described below. For convenience, the belt conveyor steel car 100 on the mine mouth side in Figure 11 will be referred to as the "rear belt conveyor steel car 100" and the belt conveyor steel car 100 on the face side will be referred to as the "front belt conveyor steel car 100".

[0042] When the conveying device shown in Fig. 11 reaches the vicinity of the face (Step 201 in Fig. 8), the connection between the front conveyor belt steel car 100 and the ordinary steel car SC is released (Step 202 in Fig. 8), the front conveyor belt steel car 100 approaches the ordinary steel car SC (Step 203 in Fig. 8), and the moving belt conveyor 130 of the front conveyor belt steel car 100 slides forward (Step 204 in Fig. 8). Furthermore, the connection between the rear conveyor belt steel car 100 and the front conveyor belt steel car 100 is released, the rear conveyor belt steel car 100 approaches the front conveyor belt steel car 100, and the moving belt conveyor 130 of the rear conveyor belt steel car 100 slides forward.

[0043] When the moving belt conveyors 130 of the front belt conveyor steel car 100 and the rear belt conveyor steel car 100 are slid forward, the excavated debris is dumped into the debris container 111 of the rear belt conveyor steel car 100. More specifically, when the excavated debris loader SL places the excavated debris on the moving belt conveyor 130 of the front belt conveyor steel car 100, the endless belt of the moving belt conveyor 130 rotates to transport the excavated debris to the wellhead side, and the excavated debris is handed over onto the moving belt conveyor 130 of the rear belt conveyor steel car 100. Then, the endless belt of the moving belt conveyor 130 rotates to transport the excavated debris to the wellhead side, and the excavated debris that has moved to the wellhead side end of the moving belt conveyor 130 is dumped into the debris container 111 of the rear belt conveyor steel car 100.

[0044] When the debris storage 111 of the rear belt conveyor steel car 100 is almost fully loaded with excavated debris, the moving belt conveyor 130 of the rear belt conveyor steel car 100 is slid backward. Then, the excavated debris is dumped into the debris storage 111 of the front belt conveyor steel car 100. More specifically, when the excavation debris loader SL places the excavated debris on the moving belt conveyor 130 of the front belt conveyor steel car 100, the endless belt of the moving belt conveyor 130 rotates to transport the excavated debris to the wellhead side, and the excavated debris that has moved to the wellhead end of the moving belt conveyor 130 is dumped into the debris storage 111 of the front belt conveyor steel car 100. When three or more belt conveyor steel cars 100 are connected, the above process may be repeated for the number of connected cars.

[0045] When the waste containers 111 of the rear belt conveyor steel car 100 and the front belt conveyor steel car 100 are almost fully loaded with excavated waste, and the waste container of the ordinary steel car SC is also almost fully loaded with excavated waste, the transport device moves to a specified location (for example, a soil dump outside the mine) (Step 210 in FIG. 8). Figure 10(h) As shown in FIG. 8, the excavated debris is discharged from the debris containers 111 of the rear steel car 100 and the front steel car 100, and the excavated debris is also discharged from the debris container of the ordinary steel car SC0 (Step 211 in FIG. 8). [Industrial Applicability]

[0046] The belt conveyor steel car and excavation waste transportation method of the present invention can be used for excavating tunnels for various purposes, such as headrace tunnels and side wall headrace tunnels using the headrace advancement method, as well as railway tunnels and road tunnels, and can also be used in any situation where rock is excavated and transported, such as in quarries. Considering that the present invention can be used for headrace tunnels for small hydroelectric power generation, that is, it contributes to reducing greenhouse gas emissions, the present invention can be said to be an invention that can be expected to not only be used industrially, but also to make a great contribution to society. [Explanation of symbols]

[0047] 100 Belt conveyor steel car of the present invention 110 (Conveyor belt steel car) Steel car part 111 (Steel car section) debris container 112 (Steel car part) wheels 113 Movable side wall (of steel car section) 120 (Conveyor steel car) conveyor rail 130 (Steel conveyor belt) Moving conveyor belt 140 (Conveyor belt steel car) moving body 150 (Conveyor belt steel car) guide rail 151 (of guide rails) outer guide rail 152 (of guide rails) inner guide rail BL locomotives RL Transport rail SC ordinary steel car SL Excavation and Muck Loader

Claims

1. A steel car that can carry excavation waste generated by tunnel excavation and move on a conveyor rail, a debris container capable of storing excavated debris; a moving belt conveyor that is installed on the upper part of the waste container and is slidable in the tunnel axial direction; The moving belt conveyor slides by being self-propelled or by being moved by an operator, The excavated waste placed on the moving belt conveyor is transported by the moving belt conveyor and is fed into the waste container from one end of the moving belt conveyor. A belt conveyor steel car characterized by:

2. The moving belt conveyor is installed so as to have an upward gradient toward the entrance of the mine.

2. The belt conveyor steel car according to claim 1.

3. A method for transporting excavation waste generated by tunnel excavation to the tunnel mouth side by a transport device connected in the order of a locomotive, a belt conveyor steel car according to claim 1 or claim 2, and a normal steel car from the tunnel mouth side to the face side, the method comprising: The ordinary steel car has the debris container capable of accommodating excavated debris, a belt conveyor forwarding step of moving the moving belt conveyor toward the face side; a belt conveyor steel car input process in which an excavated debris loader loads excavated debris onto the moving belt conveyor, causing the moving belt conveyor to transport the excavated debris to the wellhead side, and the excavated debris is input from the wellhead side end of the moving belt conveyor into the debris storage chamber of the belt conveyor steel car; a belt conveyor retraction process for moving the moving belt conveyor to a wellhead side; and a normal steel car input process for inputting excavated debris into the debris container of the normal steel car by the excavated debris loader, The locomotive moves along the conveyor rail toward the mine mouth while pulling the belt conveyor steel car and the ordinary steel car loaded with excavated waste. A method for transporting excavated debris.

4. In the belt conveyor steel car introduction step, the belt conveyor steel car, which has been released from the ordinary steel car, introduces the excavated debris into the debris container while moving toward the pit mouth.

4. The method for transporting excavated debris according to claim 3.

5. The conveying device is configured to include two or more of the belt conveyor steel cars, The belt conveyor forwarding step, the belt conveyor steel car insertion step, and the belt conveyor backwarding step are repeated for each of the belt conveyor steel cars; In the belt conveyor steel car input process for the second or subsequent belt conveyor steel car counting from the face side, excavation waste is transferred from the moving belt conveyor of the other belt conveyor steel car on the face side to the moving belt conveyor of the belt conveyor steel car.

5. The method for transporting excavated debris according to claim 3 or 4.

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