JPS58218592A - Tunnel drilling method and drill jambo used therein - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tunnel excavation/construction method and a drilling jumbo used therefor.

When tunnel excavation methods are classified according to the length of the bench, they can be divided into three methods: the mini bench method, the short bench method, and the long bench method.

Among these methods, the Longbenche method is used to reduce the risk of deterioration of rock properties, etc.
It cannot be said that it is a reasonable construction method from a mechanical standpoint. Therefore, a summary of the comparison between the mini Bentier method and the short Bentier method and their advantages and disadvantages is as follows.

The mini-benche method is a method in which the bench length is 3 m to 7 m, and a feature of the construction surface is that excavation and shearing are performed simultaneously in the lower half, so there is no loss of work surface. However, in order to secure work space on the upper half bench, a large special mount was used.
Alternatively, a special jumbo stand that can be installed in the lower half and drill holes in the upper half is required.

Theoretically, it is easy to respond to geological changes, and in bad areas, the cross section can be closed quickly.
This prevents the deterioration of the physical properties of the rock and improves the stability of the tunnel.

The short bench method is a method in which the bench length is 30m to 40m, and the construction feature is that after the upper half is excavated, the upper half is sheared and dropped onto the lower half using a tractor shovel, etc.; It is difficult to balance the cycle time, and it is necessary to build Kushiro using sliding scaffolding, which tends to result in work losses.

Theoretically, the method is slower than the Mini-Bentje method in terms of geological changes, and cannot close the cross section as quickly as possible. However, conventional excavation equipment can be used immediately.

As can be seen from the above comparison, the Mini Benche method uses a large special stand to secure a part of the work space on the construction surface, or a special chassis stand installed on the lower half of the board and capable of drilling and loosening the upper half. It can be said that it is the best construction method if it can be developed economically.

The inventors of the present invention have worked diligently to develop a special jumbo that can be installed in the latter half, that is, the lower half, and can perform drilling and other operations in the upper flat part and lower half, and as a result, has now been completed. This is it. As a result, we were able to properly close the entire tunnel at an early stage and excavate a large cross-section tunnel using the Mini Benche method, which is the most superior in terms of workability, safety, and economy, and has now completed 1q.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows tunnel excavation using the Mini Benche method using the jumbo drilling method described below, and in the example shown, 43 tons! A drilling jumbo with a rock drill is shown. The jumbo main body, indicated by 1 in its entirety, is installed between a pair of guide rails 4 on a trolley 3 equipped with a track belt 2 and the jumbo main body 1. The lift mechanism consists of a pantograph 5 and a vertical movement series for the jumbo body 6. In the figure, the lift 4m!@ is extended.
The jumbo body 1 is installed on the upper surface of the single-layered upper flat board A (the upper surface of the mini bench).

The face B of the upper half of the jumbo main body 1 shown in the figure is in the upper stomach state.
Drilling boom with rock drilling 18 100.101.102
．． The drilling booms 100 and 103 installed on both sides of the jumbo main body 1 are used to drill holes in the entire face B, C, D, and E, and to reduce the time required for charging the lower half C and D ( Although the reference numeral D is not shown in FIG. 1, D indicates the left side of F.) A hole is also drilled in the part. After drilling the upper half face B, the drilling boom 199.103 is retreated and the jumbo body 1
Holes are drilled in the lower half faces C and D using drilling booms 100 and 103 provided on both sides of the lower half faces C and D. Note that details of this point will be described later.

The jumbo main body 1 is provided with a boom slide guide rail 7, and a rock jackhammer 8 is mounted along this guide rail 7.
Drilling booms 100, 103 equipped with the following move back and forth.

A hydraulic motor 11 with a brake is provided to drive the booms 100, 103 forward and backward, and a roller chain 12 driven by the hydraulic motor 11 is connected to a slide device 15-3 attached to the rear of the boom 9 via a sprocket. The drilling boom 103 is connected to the front and rear sides of the roller chain 12 when the hydraulic motor 11 operates.
It moves back and forth along the guide rail 7.

A control cable 41 (Fig. 2) that controls the hoses and other equipment that supplies hydraulic pressure and air pressure to the hydraulic motor and cylinder is connected to the roller chain receiving guide rail 14 provided at the bottom of the boom slide guide rail 7. Hydraulic unit 15 and control device 1 provided in jumbo body 1
6. Therefore, rock drilling 818 is boom 1
You can drill holes by moving back and forth arbitrarily between the telescopic length of 03 and the quality of the guide rail.

Arra 1- for holding jumbo body 1 in place during drilling
A trigger 17 is provided, and between the outrigger 17 and the jumbo body there is a jumbo body horizontal movement cylinder 18 which adjusts the axis of the jumbo body to be parallel to the tunnel axis.

Next, a drilling boom equipped with a rock drilling machine will be described with reference to FIG.

6- The boom 9 and 10 are extended and contracted by a boom extension/retraction cylinder 19, raised and raised by a boom elevation cylinder 20, and further rotated about an axis by a boom rotation mechanism 21. The boom elevating cylinder 20 is attached to a boom rotating mechanism 21 and is pivotally connected to a bracket 22 that is pulled. A guide cell holder 23 is installed at the tip of the boom 10.
are axially connected by a horizontal shaft 24, and the guide cell pedestal 23 can be bent around the horizontal shaft 24 relative to the boom 9.10 by means of the pull 1 to the cylinder 25. The situation is shown at the bottom of FIG. Further, the guide cell pedestal 23 is configured to swing around a vertical axis 27 by a guide cell swing cylinder 26.

A guide cell 28 is provided on the guide cell holder 23 , and the guide cell 28 is moved to the guide cell holder 23 by a guide cell slide cylinder 29 provided between the guide cell holder 23 and the guide cell 28 . It is supposed to slide on top. A feed cylinder 30 for feeding the rock drill 8 is connected to the rear plate 31 of the guide drum 28.
The child piston rod 32 is connected to the rock drill 8.
Intermediate guide 34 that guides the middle of the drilling date 33
is connected to. Also, the intermediate guide 34 and the guide cell 28
The feed cylinder 30 is connected to a bow reel 35 at the rear thereof by a square pipe 36, and the piston rod 32 of the feed cylinder 30 passes through the square pipe 36.

The intermediate guide 34 and the hose guide 35 are each provided with sprockets 37 and 38 that are attached at an angle. It is connected to a coil spring or impact absorbing device 40 (Fig. 1) provided inside the guide cell 28, and the other end is connected to a rock drill l! It is continued on the front and rear sides of 18. This mechanism allows the rock drill 8 to feed within the guide cell 28 .

Conventionally, hoses and the like of the extensible portion of the boom and the sliding portion of the guide cell have been looped and attached to the outside of the boom and the guide cell. This method resulted in damage to the bows and control cables, resulting in a lot of work loss. So hose 41
etc. are directed to and connected to the rock drill 8 by a hose guide 35 from below the guide cell 28. As a result, guide cell 2
Since the hose 41 etc. no longer come out on both sides of the tunnel 8, damage accidents to the hoses etc. that often occur when drilling holes at the corners of the tunnel are eliminated.

In order to synchronize the insertion and removal of the hose 41 and the like with the movement of the guide cell 28 and the expansion and contraction of the boom 9.10, the following means are provided. A guide drum 42 is provided in the guide cell holder 23, and this guide drum 42 is attached to the guide cell 2.
Cylinder 29 for guide cell slide to slide 8
A wire loaf 43 runs from the front end 44 of the guide cell 28 to the intermediate sheep 4 of the guide drum 42 to synchronize the movement of the
5 and is fixed at the front end 46 of the guide cell holder 23. On the other hand, the wire 48 fixed to the rear end 47 of the guide cell 28 is connected to the turning sheep 48 in the guide cell holder 23.
49 and is fixed at the rear end 59-1 of the guide cell holder 23 from the rear sheep 50 of the guide drum 42. Therefore, the guide drum 42 moves back and forth at 1/2 of the movement of the guide cell 28, allowing the hose 41 and the like to be inserted and removed.

Regarding boom extension/retraction, connect hose 4 inside boom 9.10.
A hose guide 53 is provided behind the boom 9 and is moved by a guide drum moving cylinder 52, which is used as a first-class duct. 19 and a guide drum moving cylinder 52 having a cross section twice the inner diameter cross section of the boom telescoping cylinder 19 are connected in series and synchronized. □ Referring again to Figure 1, the working deck used to charge a hole drilled with a rock drill will be explained.

The work deck is a three-dimensional moving deck 5 that can move in three dimensions.
4, and one end of a pair of deck vertical movement booms 55 and a pair of horizontal holding members 56 are connected to this three-dimensional moving deck 54 by a universal joint 57. The other ends are each axially connected by a horizontal shaft 59 via a bracket 510-8.

The bracket 58 is also axially connected to the base 60 by a vertical shaft 61. A cylinder 62 for vertically moving the deck and a cylinder 63 for swinging the deck are provided between the base 60 and the boom 55 for vertically moving the deck. By operating the deck vertical movement cylinder 62, the rib 54 moves up and down, and by operating the deck swing cylinder 63, the deck 54 swings left and right. This allows the deck 54 to move in three dimensions.

The entire working deck described above can be moved back and forth on a pair of working deck moving rails 64 provided on the jumbo body 1. For this purpose, a hydraulic motor 65 with a brake is provided, and the hydraulic motor 65 is engaged with a sprocket. The numbered roller chains 66 are fixed to the front and rear sides of the working deck. By operating the hydraulic motor 65, the working deck moves back and forth on the working deck moving rail 64.

A ramp 67 is provided for a worker to get on and off the jumbo body 1, and the ramp 67 can be bent by a ramp bending cylinder 68.

Next, referring to Figures 3 to 5 in addition to Figures 1 and 2, we will explain how to perform tunnel drilling using the mini-bench T method (bench length 5 to 7 m) using the aforementioned drilling jumbo. . With the jumbo main body 1 raised by the lift mechanism 5.6, the endless track belt 2 is driven to advance the drilling jumbo to the face, and the outrigger 17 is lowered to fix the drilling jumbo. The state is shown in FIG. In this state, the jumbo body 1 is placed on the top surface of the upper half A (top surface of the mini bench).
will be the same as when it is installed. With this jumbo main body raised, the face B in the lower half is drilled using 5 series of full rock drilling Ia8. At that time, the boom 9 and 10 equipped with the rock drill 8 is extended and contracted by the boom extension and contraction cylinder 9, and is also raised and raised by the boom elevation cylinder 20.
You can spin it with 1121. Further, the thrust of the rock drill 8 is given by a feed cylinder 30. Furthermore, the hose and control cable 41 are inserted and removed by synchronizing the guide reel 42 with the movement of the guide cell slide cylinder 29 for sliding the guide cell 28, and for extending and retracting the boom 9. This is done by synchronizing the guide drum moving cylinder 52 with the movement of the cylinder 19. And jackhammer I! Since the drilling boom 9.10 equipped with 18 is driven forward and backward by a hydraulic motor 11 with a brake, a hole can be drilled at any position between the extension and contraction of the boom 9.10 and the length of the boom slide guide rail 7. .

When drilling of the upper half face B is completed, the entire drilling boom 9.10 is moved backward by the hydraulic motor 11, and the drilling boom 9.10 of the lower half face C is moved backward.
, D are the drilling booms 9 provided on both sides of the jumbo body 1.
．． Drill holes according to No. 10. At that time, as shown in the lower part of FIG. 1, the boom 9.10 is reversed by the boom rotation mechanism 21, and the guide cell pedestal 23 is bent relative to the boom 9.10 by the tilt cylinder 25 to perform parallel drilling and piercing. give horns.

The charge on the upper part of the upper half face B is transferred to a three-dimensional moving deck 54 that is moved three-dimensionally by a cylinder 62 for vertically moving the deck and a cylinder 63 for swinging the deck. Charge on the three-dimensional moving deck 54 is performed during drilling of the lower half face C1D. The lower part of the upper half face B is charged directly.

When charging of the upper half face B is completed, raise the arranger 1-rigger 17 and drive the track belt 2 to move the drilling jumbo backwards, lower the outrigger 17 again to fix the drilling jumbo, The jumbo main body 1 is lowered by the lift mechanism 5.6 to drill a hole in the center surface E of the lower half face. When the drilling of the lower half face center surface E is completed, the drilling jumbo becomes unnecessary, and the outrigger 17 is raised and the endless track belt 2 is driven to retract the drilling jumbo to an appropriate position behind the face.

This eliminates the need for a slope for moving the drilling jumbo from the lower half to the upper half, which was conventionally necessary, and it becomes possible to simultaneously drill holes in the upper and lower halves.

The guide cell holder 23 can be bent horizontally at right angles to the boom 9.10 by the guide cell swing cylinder 26, and this bending can be done by the boom slide guides 7 on both sides of the jumbo book 14-1. The lock bolt holes 70 can also be drilled over a wide range by jumbo holes.

Regarding the scraping process, as shown in FIGS. 3 and 4, the shear from the upper half is dropped into the lower half by a back bow 71, and the wheel loader 72 in the lower half is loaded with the shear from the lower half into a dump truck. 73, transported to the dumping ground outside the mine, and taken out.

As can be seen from the above description, according to the present invention, in terms of construction, the upper and lower halves of the face can be excavated and offset simultaneously, and no loss occurs in the work area, and in terms of natom theory, , it is easy to respond to geological changes, the cross section can be closed early, and the deterioration of rock properties can be prevented, etc. The Mini Benche method is the best method from both a construction and theoretical perspective. It is something that can be implemented.

[Brief explanation of drawings]

1 and 2 show a drilling jumbo according to the present invention,
FIG. 1 is a perspective view showing almost the entire structure, and FIG. 2 is a perspective view of a drilling boom equipped with a rock drilling machine. 3 and 4 show a state in which a tunnel is being excavated by the tunnel excavation method according to the present invention, with FIG. 3 being a plan view thereof and FIG. 4 being a side view thereof. FIG. 5 is a front view showing the excavation pattern of the face. 1... Jumbo body 3... Trolley 5.6...
・Lift mechanism 7... Guide rail for boom slide 8... Rock drill 9.10... Boom 1
1... Hydraulic motor for drilling boom slide -9...
・Cylinder for boom extension and contraction 20... Cylinder for boom elevation 21... Boom rotation mechanism 23... Guide cell cradle 25... Guide cell cradle tilt cylinder 26... Cylinder for guide cell swing 28
...Guide cell 29...Cylinder for guide cell slide 30...Cylinder for feed 41.
... Hose, control cable 54 ... Three-dimensional moving deck 55 ... Boom for three-dimensional moving deck 56 ... Horizontal holding material
62...Cylinder for vertical movement of the deck 63...Deck swing cylinder 64...Rail for moving the deck
65...Hydraulic motor for deck movement 17-Continued from page 10 Inventor: Fuku-Kei, 1-3 Kamei-cho, Takamatsu City, Shikoku Branch of Kashima Construction Co., Ltd.0 Inventor: Hisatoshi Matsuyo, 1, Kamei-cho, Takamatsu City 3-chome Kajima Construction Co., Ltd. Shikoku Branch

Claims (2)

[Claims] (1) In the tunnel excavation method in which tunnel excavation is carried out using the Mini Benche method, a drilling jumbo is equipped with multiple drilling booms, and the jumbo moves up and down with respect to a self-propelled cart in the lower half, and excavates the hole in the upper half. and a tunnel excavation method characterized by drilling holes in the lower half face using drilling booms provided on both sides of the jumbo body. (2) A drilling jumbo used in the tunnel excavation method that excavates tunnels by the mini-benche method, which is equipped with a plurality of drilling booms and a three-dimensional movable deck installed above the jumbo body; A drilling jumbo that can move up and down on the self-propelled cart in the lower half is used to drill holes in the upper half, and a three-dimensional moving deck is used to charge the upper half face, drive rock bolts, and support the tunnel. This drilling machine is characterized by being used for construction work, etc.