JP3970289B2 - Waste discharge system and waste discharge method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a tunnel excavation technique using an advanced guide shaft such as a TBM method, and more specifically, a slip discharge system and a slip discharge that efficiently discharges a slip from a relatively small cross-section shaft such as an initial tunnel. Regarding the method.

  The TBM (Tunnel Boring Machine) method is a method of excavating while pressing the cutter head against the rock, crushing the rock with the cutter head, and discharging the sludge to the rear, excavating the formation where the rock and soil are combined. In recent years, this method is often used for leading excavation excavation. However, in many cases, the diameter of the tunnel excavated by the TBM method is a comparatively small cross section of 3 m to 4 m, which is smaller than the diameter of the tunnel excavated by the shield method or the NATM method. Is relatively limited.

  Also, in the TBM method, excavation is carried out while discharging the excavated rock mass backward from a tunnel with a relatively small cross section, so that the gap is discharged using a limited work space immediately after the TBM equipped with the cutter head. It is necessary to let In this case, the gap discharged rearward by a discharge device arranged adjacent to the face, such as a screw conveyor, can be loaded into a dump truck using a wheel loader etc. A method is used in which a belt is conveyed to a TBM starting base using a belt conveyor, and loaded onto a dump truck at a TBM starting base that has already been expanded in diameter by, for example, the NATM construction method, and carried out of the mine.

  As described above, tunnels excavated by the TBM method have a relatively small excavation cross-sectional area, and the entry and exit of heavy machinery such as dump trucks and wheel loaders are remarkably restricted, which is not appropriate from the viewpoint of securing work space and safety. Absent. Further, if the gap is discharged using a long belt conveyor that can be stretched immediately after the tunnel face, the discharge equipment can be arranged without being influenced by the excavation cross section. However, since tunnels excavated by the TBM method are relatively short distances, it is not always satisfactory in terms of material consumption efficiency and construction cost to manufacture long belt conveyors that cannot be shared with other constructions. The surplus of the long belt conveyor consumes wasted space even in a tunnel with a large cross-sectional area.

For example, Japanese Laid-Open Patent Publication No. 2002-129888 (Patent Document 1) and Japanese Laid-Open Patent Publication No. 2003-227294 (Patent Document 2) disclose a technique for discharging a gap such as a gap from a tunnel having a relatively small cross section, such as a TBM method. Has been. Patent Document 1 discloses a point in which a belt conveyor is provided in the TBM and discharges the outside of the TBM, but what is disclosed about how to efficiently discharge the accumulated accumulated inside the tunnel. Not what you want. Further, Patent Document 2 discloses a slipping device in a TBM for excavation of a modified cross section, and a first belt conveyor for discharging a slip and a slip collected by the first belt conveyor are horizontally carried out. Although there is disclosed a slipping device that includes a second belt conveyor and can efficiently discharge the slip generated outside the face plate, the belt conveyor causes the slip to the outside of the tunnel as the TBM progresses. There is no disclosure about unloading.
JP 2002-129888 A JP 2003-227294 A

  The present invention has been made in view of the above-mentioned problems of the prior art, and efficiently transports the gap discharged by the TBM method to a large-area tunnel where a wheel loader or dump truck such as a TBM starting base can work. The present invention relates to a gap discharge system and a gap discharge method for initial excavation. That is, in the present invention, instead of introducing heavy machinery or constructing a long belt conveyor in a tunnel having a relatively small cross-sectional area such as an advanced guide shaft, a general-purpose short belt conveyor corresponding to the advance of the TBM is provided. In the discharge position of the large cross-sectional area tunnel, they are arranged so as to overlap each other vertically. The support member is formed with a pulling beam that engages with the front portion of the short belt conveyor and pulls the short belt conveyor as the support member moves. The pulling beam pulls the front portion of the short belt conveyor to form a short belt conveyor row composed of the short belt conveyors, and the short belt conveyor row is extended as the TBM advances. Further, the last belt conveyor is provided with a conveyor feeding member, and a belt conveyor to be extended next is movably mounted thereon. The loading belt conveyor is pulled out from the last belt conveyor as the preceding short belt conveyor moves as the TBM moves forward, and drops the slip onto the conveying belt of the last belt conveyor. The fallen gap falls on the last belt conveyor and is deposited on the mine shaft whose diameter has been expanded by the NATM method or the like from the last belt conveyor. The accumulated deposit is loaded on a dump truck using a wheel loader or the like and carried out of the mine.

That is, according to the present invention,
A slip discharge system for discharging slip from the inside of a tunnel,
A belt conveyor pulled by a conveyor loader;
A belt conveyor provided with a conveyor delivery member for placing the placement belt conveyor and delivering the placement belt conveyor;
A slip discharge system is provided that includes a conveyance line formed by a belt conveyor row that interlocks the placement belt conveyor as the conveyor loader moves.

  According to a second aspect of the present invention, there is provided a slip discharge system comprising a support member that connects the plurality of belt conveyors so as to move the belt conveyor row along a movement path along the mine shaft. The

  According to a third aspect of the present invention, the mine shaft is an advanced guiding shaft excavated by TBM, and the conveyor loader moves forward with advancement of the TBM, and pulls the slippage due to the TBM to the conveyor loader. A slip discharge system is provided comprising a continuous belt conveyor that drops onto a belt conveyor.

According to invention of Claim 4 of this invention, it is a slip discharge method which discharges a slip from the inside of a tunnel,
A step of forming a belt conveyor row by engaging a mounting belt conveyor with a support member from a belt conveyor provided with a conveyor sending member to a belt conveyor pulled by a conveyor loader;
And a step of moving the placing belt conveyor in conjunction with the movement of the conveyor loader and extending a conveying line by the belt conveyor row.

  According to the invention of claim 5 of the present invention, in the step of forming the belt conveyor row, the rear portion of the belt conveyor constituting the belt conveyor row is spatially superimposed on the upper side of the front portion of the placing belt conveyor. A method for discharging the slip is provided, which includes a step of supporting as described above.

  According to invention of Claim 6 of this invention, the slip discharge method including the process of arrange | positioning the mounting belt conveyor for extending the said belt conveyor row | line | column next on the said conveyor delivery member is provided.

  According to the present invention, it is possible to provide an initial gap discharge system and an initial gap discharge method that can discharge gaps efficiently and cost-effectively from a tunnel with a relatively small cross section.

  FIG. 1 shows a cross section in the vicinity of a face of an advanced guide shaft constructed by a TBM method or the like. The advanced guide shaft 10 has an excavation section of approximately 3 to 4 m, and is moved by a vehicle 12 having a moving mechanism such as an endless track drive and a tire as shown in FIG. The conveyor loader 14 leads the short belt conveyor row, and the conveyor loader 14 is loaded with materials necessary for rails or supporting work. The conveyor rotor 14 is equipped with a continuous belt conveyor 16, and the continuous belt conveyor 16 carries back the gap excavated by the cutter head. Further, the conveyor loader 14 is placed so as to be movable on the rail 18, and moves along with the movement of the vehicle 12 as the TBM moves forward, and discharges the gap. FIG. 1B is a view showing the arrangement of the rearmost part of the continuous belt conveyor 16 at the rear part of the conveyor loader 14 and the frontmost part of the short belt conveyor 20 arranged at the frontmost part. In the present invention, the term "slipping" refers to ground crushed material that includes one or both of excavated rock mass and excavated soil layer, and is discharged from the tunnel as the excavation progresses. Means.

  A driving device 22 for driving the continuous belt conveyor 16 is provided at the rearmost portion of the conveyor loader 14. Is arranged. The front part of the short belt conveyor 20 is connected to the rear part of the conveyor loader 14, and the support member 26 is arranged so that the rear part of the short belt conveyor 20 and the front part of the subsequent short belt conveyor 24 overlap in space. Is engaged. The continuous belt conveyor 16 drops the gap on the adjacent short belt conveyor, and enables the movement of the short belt conveyor row 28 starting from the short belt conveyor 24 as the conveyor loader 14 moves.

  FIG. 2 is a front view showing the support member 26 used in the present invention. The support member 26 includes a support column 26a, a frame 26b extending along the rail 18, and a reinforcing member (not shown) that reinforces the support column 26a. Wheels 26 c are attached to the frame 26 b, and the wheels 26 c place the support member 26 movably on the rail 18. The frame 26b is connected by traction members such as an upper traction beam 26d and a lower traction beam 26e extending in the width direction of the rail 18. In FIG. 2, the short belt conveyors 20 and 24 are indicated by broken lines, and each extend in the direction perpendicular to the paper surface. Each of the traction beams 26d and 26e includes a lateral shake prevention member 26f, and each of the traction beams 26f is formed by using an L angle or the like so that the short belt conveyor does not fall due to vibration or the like. 26e and 26d are fixed by welding or the like.

  FIG. 3 is a view showing an embodiment of a short belt conveyor row 28 extending between the conveyor loader 14 and the last belt conveyor (not shown). Fig.2 (a) is sectional drawing of a mine shaft, and FIG.2 (b) shows the side view of a mine shaft. As shown to Fig.3 (a), in the inside of the advanced guide shaft 10, the short belt conveyor row | line | column 28 formed by connecting a short belt conveyor is arrange | positioned by the side of a mine shaft. The short belt conveyor row 28 is connected by a support member 26, and a space in which the worker 30 stands on the floor surface 32 and can perform work with a margin is secured. In the present invention, the short belt conveyor row 28 is connected with flexibility to such an extent that it can move along the rail as long as the loading belt conveyor 44 can be moved corresponding to the advance of the conveyor loader 14. Means a row including a plurality of belt conveyors.

  FIG. 3B shows an embodiment of the short belt conveyor row 28. The front portion of the short belt conveyor 34 included in the short belt conveyor row 28 is provided with a protruding portion 34a formed by a conveyor frame or the like below, and the protruding portion is engaged with the lower pulling beam 26e of the support member 26. Together, the short belt conveyor 34 is pulled. Further, the rear part of the short belt conveyor is provided with a protruding portion 34b similarly formed on the conveyor frame, and engages with an upper pulling beam of another supporting member. In the present invention, the protrusion 34b can be manufactured separately from the short belt conveyor, but in the present invention, the protrusion 34b that houses a drive motor for driving the short belt conveyor 34 or an end roller is accommodated. It is preferable to use any of the protrusions.

  FIG. 4 is a view showing the rearmost configuration of the short belt conveyor row 28 of the present invention. The rear end of the last belt conveyor 36 is held by the support structure 38, and the gap 40 is dropped from the last tail. On the upper part of the conveyor frame of the last belt conveyor 36, conveyor delivery members 42 are attached to the left and right ends at positions that do not hinder the movement of the conveyor belt by welding or bolting. In the present invention, the conveyor feeding member 42 can be formed as an L angle using rail end materials, steel plates, or the like, but is attached to the last belt conveyor as a detachable module having rollers and lateral displacement regulating angles. It can also be installed as needed. On the conveyor delivery member 42, a placement belt conveyor 44 is placed so as to be sent out freely. In the present invention, in order to facilitate the movement of the placing belt conveyor 44, the placing belt conveyor 44 can be arranged by providing a rotation roller on the conveyor feeding member 42. A lubricating component such as lubricating oil or grease can be applied to the contact portion of the conveyor delivery member 42.

  The front part 44a of the loading belt conveyor 44 is engaged with the lower pulling beam 26e of the support member 26, and moves to the left side of the drawing with the support member 26 as the support member 26 advances as the TBM is dug. To do. Along with this, the placing belt conveyor 44 moves on the upper side of the conveyor delivery member 42 and extends the gap conveying line. When the rear portion 44b of the placement belt conveyor 44 moves to a predetermined position of the conveyor delivery member 42, a new placement belt conveyor and a short belt conveyor 46 that was the placement belt conveyor until immediately before are arranged to be towable. .

  FIG. 5 is a view showing an embodiment in which the short belt conveyor 46 and the placing belt conveyor 44 are arranged to be towable. In many cases, the loading belt conveyor 44 is laid immediately after the wellhead 48 of the advanced tunnel. For this reason, the crane 50 is installed in the wellhead 48 beforehand, the rear part of the short belt conveyor 46 is lifted by the crane 50, the support member 26 is inserted between the rails 18, and the rear part of the short belt conveyor 46 is supported by the support member. 26 is engaged with the upper traction beam 26d. Further, another crane 52 is used to place the front portion 44 a of the placement belt conveyor 44 on the conveyor delivery member 42 while engaging the upper pulling beam 26 d of the support member 26.

  Thereafter, when the conveyor loader 14 moves forward, the placing belt conveyor 44 is sent out, and the conveying line is continuously extended. With the above-described method, the transport line by the short belt conveyor can be smoothly extended with the progress of the TBM excavation, and there is no need for a large-scale member or device used for that purpose. It is possible to discharge a gap discharged from a relatively small cross-section tunnel.

  So far, the present invention has been described with the embodiment shown in the drawings. However, the present invention is not limited to the above-described embodiment, and the displacement from the advanced guide shaft by the TBM method of the present invention is not limited. It can be used not only for discharging, but also for discharging the gap from a tunnel having a relatively small cross section where it is difficult to carry out the gap directly by heavy machinery. Furthermore, in addition to the embodiments disclosed in the present invention, other embodiments, changes in members, dimensions, materials, and the like that are conceived by the common general knowledge of those skilled in the art are within the scope of the effects of the present invention. However, it can be appropriately changed within a range that can be conceived by those skilled in the art.

  INDUSTRIAL APPLICABILITY As described above, the present invention can provide a highly efficient system and method for discharging a gap through a tunnel having a relatively small cross section constructed by a TBM method or the like, and significantly improves the efficiency of tunnel excavation including the TBM method. It is an excellent invention that can be improved.

The figure which made the tunnel a cross section and showed the foremost end of the slip discharge system of this invention. The figure which showed the supporting member used by this invention. The figure which showed the belt conveyor row | line | column of this invention. The figure which showed the belt conveyor row | line | column containing the rearmost belt conveyor and mounting belt conveyor of this invention. The figure which showed the process of adding the mounting belt conveyor of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Advanced guide shaft 12 ... Vehicle 14 ... Conveyor loader 16 ... Continuous belt conveyor 18 ... Rail 20 ... Short belt conveyor 22 ... Drive device 24 ... Short belt conveyor 26 ... Support member 26a ... Support pillar 26b ... Frame 26c ... Wheel 26d ... Upper traction beam 26e ... Lower traction beam 26f ... Side-shake prevention member 28 ... Short belt conveyor row 30 ... Worker 32 ... Floor surface 34 ... Short belt conveyors 34a, 34b ... Projection 36 ... Last belt conveyor 38 ... Support structure 40 ... Slip 42 ... Conveyor delivery member 44 ... Placing belt conveyor 44a ... Front part 44b ... Rear part 46 ... Short belt conveyor 48 ... Wellhead 50 ... Crane 52 ... Crane

Claims (5)

A slip discharge system for discharging slip from the inside of a tunnel,
A short belt conveyor towed by a conveyor loader;
A placing belt conveyor pulled by the short belt conveyor;
Is installed in the wellhead, placed the deposit belt conveyor, is formed from the last belt conveyor provided with a conveyor delivery member for delivering the placement belt conveyor, wherein before with the movement of the conveyor loader the location belt conveyor saw including a conveyance line that is extended by moving the moving direction of the conveyor loader,
The slip discharge system, wherein the transport line is extended in the moving direction by arranging a new placement belt conveyor on the conveyor delivery member . Said belt conveyor train composed of a short belt conveyor and the placement belt conveyor so that to form along the path of travel along the tunnel, said short belt conveyor and the placement belt conveyor, the placement belt The slip discharge system according to claim 1, further comprising a support member that connects a conveyor and the new placement belt conveyor . The tunnel is an advanced shaft excavated by TBM, and the conveyor loader is a continuous belt conveyor that moves forward with the advance of the TBM and drops the TBM slip onto a short belt conveyor pulled by the conveyor loader. The slip discharge system according to claim 1 provided. A slip discharge method for discharging slip from the inside of a tunnel,
A short belt conveyor which is driven by a conveyor loader is installed in the wellhead, the step of engaging the end belt conveyor provided with a conveyor delivery member a deposit belt conveyor支保member to form a belt conveyor train,
A step of said said placing belt conveyor before with the movement of the conveyor loader is moved in the moving direction of the conveyor loader, extending the transfer line by the belt conveyor train,
Disposing a mounting belt conveyor for extending the belt conveyor row next on the conveyor delivery member . The step of forming the belt conveyor row includes a step of supporting the rear portion of the short belt conveyor constituting the belt conveyor row so as to spatially overlap above the front portion of the placing belt conveyor. 4. A method for discharging a gap according to 4.

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