KR101794257B1 - Rock cutting apparatus and method for tunnel excavation - Google Patents

Abstract

The present invention relates to a rock cutting device for excavation and a cutting method and, more specifically, relates to a rock cutting device for excavation and a cutting method capable of cutting rock blocks from a rock face and is able to perform a center cut when excavating a tunnel or the like. The rock cutting device for excavation comprises: a main body; a driving unit which drives a wire saw; a plurality of entry arms which have a stick shape wherein one end is combined with a front side of the main body of which the other end protrudes forwards; direction changing units combined with the other end of the entry arms in order to be rotated; and a closed loop-shaped wire saw installed along the driving unit, the entry arms, and the direction changing units. In addition, the wire saw is moved by operation of the driving unit while tension of the wire saw is regulated by a front and back movement of the driving unit. A penetration hole is formed inside the entry arm in order to place the wire saw. The wire saw penetrates the penetration hole formed inside the entry arm and changes a direction thereof by the direction changing unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rock cutter for excavation,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock cutter for excavation and a cutting method, and more particularly, to a rock cutter for excavation and a cutting method capable of cutting a rock block in a rock wall when excavating a tunnel or an underground.

Generally, tunnels are excavated to construct roads, railways or urban subways that penetrate mountainous areas. Mountainous areas and urban subterranean spaces usually have a geological structure composed of various types of rocks.

As described above, excavation by blasting when excavating a tunnel is widely used because of its low cost and fast excavation speed compared with mechanical excavation.

However, since tunnel excavation by blasting mostly uses gunpowder, noise and vibration caused by blasting can cause unexpected damage to the surrounding environment where the tunnel is excavated.

Therefore, in order to increase the efficiency of blasting, it is necessary to increase the excavation field per blasting, but it is necessary to reduce blasting damage such as ground vibration, noise, storm pressure and dust generation by blasting.

In order to solve this problem, a tunnel blasting method is used in which the core is removed from the deep portion of the tunnel.

In recent years, as disclosed in Korean Patent Laid-Open Nos. 10-2015-0139232 and 10-1508205, there has been proposed a method of using a wire saw And devices are being developed.

Such a conventional rock cutter has difficulties in cutting the side and the back of the rock block in the rock wall by using a wire saw, and also has a difficulty in pulling out the cut rock block from the rock wall.

Korean Patent Publication No. 10-2015-0027429 Korean Patent Publication No. 10-2015-0139232 Korean Patent No. 10-1508205

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a rock block capable of easily cutting a rock block from a rock wall while firmly supporting the side and rear faces of the rock block, And it is an object of the present invention to provide a rock cutting apparatus and a cutting method for excavation.

In order to accomplish the above object, according to the present invention, there is provided a rock cutting apparatus for excavation comprising: a body; A driving unit for driving the wire saw; A plurality of entry arms formed in a bar shape and having one end coupled to the front of the main body and the other end projecting forward; A direction switching unit rotatably coupled to the other end of the entry arm; Wherein the wire saw moves by the operation of the driving unit and the tension of the wire saw is adjusted by the forward and backward movement of the driving unit. Wherein the insertion arm is formed with a through hole in which the wire saw is disposed and the wire saw is turned by the direction switching unit after passing through the through hole formed in the entrance arm .

The direction changing unit includes: a bracket rotatably coupled to the other end of the entry arm about the longitudinal direction of the entry arm; And a guide roller which is coupled to the bracket and rotates about a center axis about a direction perpendicular to the longitudinal direction of the entry arm, wherein a wire saw passing through the through hole is turned in contact with the guide roller.

The through hole is formed at the center of the entry arm, and the central axis of the guide roller is disposed at an eccentric position from the through hole. When the bracket is rotated, the guide roller rotates together with the bracket around the through hole .

The outer circumferential surface of the guide roller contacting the wire saw penetrating through the through hole is biased in the same direction as the through hole or in a direction in which the direction of the wire saw is switched.

The direction changing unit may further include an auxiliary roller disposed parallel to the guide roller and rotatably coupled to the bracket, wherein the wire saw passes between the guide roller and the auxiliary roller.

Further comprising: a rotation operation unit that rotates the direction switching unit with respect to the entry arm, wherein the direction switching unit rotates with respect to the entry arm and then remains in a stopped state.

The rotation operation portion includes a rotation drive shaft provided along the entry arm; An operating lever mounted on one end of the rotary drive shaft; And a pinion gear mounted on the other end of the rotary drive shaft, wherein the bracket includes: a hollow rotary body having a ring gear formed on an outer circumferential surface thereof so as to surround the other end of the entry arm; And a pair of support protrusions protruding from the hollow rotating body and rotatably coupled to the guide roller, wherein the pinion gear and the ring gear are interlocked with each other, and by the rotation of the pinion gear, And is rotated about the entry arm.

Wherein the auxiliary guide member further protrudes to the outside with respect to the center of the through hole with respect to the rotational locus of the direction switching unit, Is disposed through the auxiliary guide member.

The auxiliary guide member is formed with a plurality of seating grooves on which the wire saws whose directions are switched by the direction switching unit are seated in the through holes.

One end of each of the entry arms is pivotally coupled to the body independently of each other.

In order to achieve the above object, according to the present invention, there is provided a method for cutting a rock wall for excavation, comprising the steps of moving a rotating wire saw in a depth direction of a rock wall to form a rectilinear section, A side cutting step of forming a rock block which is separated from the rock wall by the folding; An inserting step of inserting a conveying member into a lower portion of the rock block through the incision; A back surface cutting step of cutting the back surface of the rock block, the back surface of which is coupled to the rock wall, using a wire saw to separate the rock block from the rock wall; A drawing step of drawing the rock block separated from the rock wall from the rock wall using the conveying member; And a tunnel incision step of forming an arched tunnel incision using a wire saw along the shape of the tunnel to be formed by blasting.

As described above, according to the rock cutting apparatus and method for excavation of the present invention, the following effects can be obtained.

It is possible to easily cut the rock block from the rock wall while supporting the rock block more firmly while cutting the side and the back side of the rock block.

Further, since the wire saw is fed through the through hole formed in the entrance arm, it can be more stably prevented from being damaged by the external force.

Further, since the central axis of the guide roller is disposed at a position eccentric from the through-hole, it is possible to prevent the wire saw penetrating through the through-hole from being twisted when the bracket rotates.

Further, after the direction changing section is rotated at a certain angle by the rotation operating section, it can be stopped without being rotated arbitrarily and in a rotated state.

1 is a perspective view of a rock cutter for excavation according to an embodiment of the present invention,
2 is a plan view of a rock cutter for excavation according to an embodiment of the present invention,
3 is a perspective view of a direction switching unit according to an embodiment of the present invention,
4 is a side view of a direction switching unit according to an embodiment of the present invention;
5 is a front view of a direction switching unit according to an embodiment of the present invention;
6 is a perspective view of the direction changing unit rotated by the rotation operating unit according to the embodiment of the present invention,
7 is a plan view of a state in which an entry arm of a rock cutting apparatus for excavation according to an embodiment of the present invention is inserted and arranged in a perforation hole,
FIG. 8 is a plan view showing a state in which the rock wall is cut by the movement of the wire saw in FIG. 7,
FIG. 9 is a front sectional view showing a process of cutting a rear face of a rock block using a rock cutting apparatus for excavation according to an embodiment of the present invention,
FIG. 10 is a side view of a process of drawing a rock block by a conveying member according to an embodiment of the present invention; FIG.

The rock cutting apparatus for excavation according to the present invention includes a main body 10, a drive unit 20, an input arm 30, a direction dial unit, a wire saw 50, a rotary operation unit 60, and the like.

The main body 10 is connected to an excavator, a moving car, or other equipment, and the input arm 30 coupled to the main body 10 has a plurality of parts .

The driving unit 20 drives the wire saw 50 and may be directly coupled to the main body 10 or may be spaced apart from the main body 10.

In the drawings of this embodiment, the driving unit 20 is shown to be spaced apart from the main body 10 and mounted at another place.

The driving unit 20 drives the wire saw 50 to rotate and at the same time moves the wire saw 50 as a whole back and forth.

As the structure in which the driving unit 20 moves the wire saw 50 while rotating the wire saw 50 as described above, it is sufficient to use a conventionally known structure such as a guide rail structure, an LM guide, and a cylinder structure.

The wire saw 50 can be moved in the forward and backward direction as a whole while being rotationally moved by the driving unit 20 as described above.

The entry arm 30 is formed in a plurality of bar shapes and has one end coupled to the front of the main body 10 and the other end projecting forward.

In the present embodiment, the entry arm 30 is formed of two pieces, and is separated from the front end of the main body 10 by mutual spacing, and the other end is protruded forward.

In the drawing of the present embodiment, the number of the entry arms 30 is two, but the number of the entry arms 30 may be three or more.

The entry arm 30 is inserted into the perforation hole 81 formed in the rock wall as described later.

The insertion arms 30 mounted on both ends of the main body 10 can be moved in both lateral directions of the main body 10 to adjust the spacing therebetween.

One end of the entry arm 30 coupled to the main body 10 is rotatably mounted to the main body 10 independently of each other.

Therefore, when the perforation hole 81 formed in the rock wall is formed to be twisted, the entry arm 30 is easily inserted into the perforation hole 81 which is twisted by turning the entry arm 30 relative to the main body 10 .

Also, the length of the entry arm 30 may be extended through a cylinder structure or the like.

A through hole (31) in which the wire saw (50) is disposed is formed in the entry arm (30).

An auxiliary guide member (35) is coupled to the outer circumferential surface of the arm (30).

At this time, the outer diameter of the auxiliary guide member 35 is larger than the outer diameter of the entry arm 30.

The outer diameter of the auxiliary guide member 35 is formed to be slightly smaller than the diameter of the perforation hole 81 formed in the rock wall so that the entry arm 30 does not contact the inner peripheral surface of the perforation hole 81, (35).

The direction changing unit 40 is rotatably coupled to the other end of the entry arm 30 and rotates in the direction of the wire saw 50 passing through the through hole 31 formed in the entry arm 30 .

The direction switching unit 40 includes a bracket 41, a guide roller 42, and an auxiliary roller 43.

The bracket 41 is rotatably coupled to the other end of the arm 30 about the longitudinal direction of the arm 30.

The guide roller 42 is mounted on the bracket 41 so as to be rotatable about a center axis about a direction perpendicular to the longitudinal direction of the entry arm 30.

Therefore, the wire saw 50 passing through the through hole 31 formed in the arm 30 is turned in contact with the guide roller 42.

The through hole 31 is formed at the center of the entrance arm 30 and the central axis of the guide roller 42 is disposed at an eccentric position from the through hole 31. When the bracket 41 rotates, The guide roller 42 rotates with the bracket 41 about the through-hole 31.

The outer circumferential surface of the guide roller 42 which is in contact with the wire saw 50 passing through the through hole 31 is formed so as to be in line with the through hole 31 or to change the direction of the wire saw 50 Direction.

Therefore, even if the direction switching unit 40 is rotated around the entry arm 30, the wire saw 50 penetrating through the through hole 31 can be prevented from being twisted.

The auxiliary roller 43 is disposed in parallel with the guide roller 42 and is rotatably coupled to the bracket 41.

By the auxiliary roller 43, the wire saw 50 can be reliably transferred from the guide roll while passing between the guide roller 42 and the auxiliary roller 43.

The wire saw 50 has a closed loop shape of an endless track and is installed along the driving part 20, the input arm 30 and the direction switching part 40.

The wire saw 50 moves by the operation of the driving unit 20 and is moved in the forward and backward directions while the tension of the wire saw 50 is adjusted by the forward and backward movement of the driving unit 20. [

The wire saw 50 passes through the through hole 31 formed in the entry arm 30 and is then turned by the direction switching unit 40.

The wire saw 50 passes through the through hole 31 formed in the entry arm 30 so that the wire saw 50 can be stably transported without being detached.

The rotation manipulation part 60 serves to rotate the direction switching part 40 with respect to the arm 30.

The direction switching unit 40 can not be arbitrarily rotated by the rotation operating unit 60 and can be rotated with respect to the input arm 30 without being arbitrarily rotated by the rotation operating unit 60. However, And then remains stationary.

The rotary operation portion 60 includes a rotary drive shaft 61, an operation lever 62, and a pinion gear 63.

The rotary drive shaft 61 is installed along the entry arm 30.

The operation lever 62 is mounted on one end of the rotation drive shaft 61 and the rotation drive shaft 61 is rotated as an operator grasps the operation lever 62 and rotates.

At this time, the operation lever 62 may be connected to a motor or the like and rotated by an electric power.

The pinion gear 63 is mounted on the other end of the rotation drive shaft 61 and rotated together with the rotation drive shaft 61.

The bracket 41 constituting the direction switching unit 40 is constituted by the hollow rotating body 41a and the support protrusion 41c.

The hollow rotary body 41a is rotatably engaged with the other end of the arm 30, and a ring gear 41b is formed on the outer circumferential surface of the hollow rotary body 41a.

The ring gear 41b meshes with the pinion gear 63 so that the hollow rotary body 41a having the ring gear 41b formed by the rotation of the pinion gear 63 is engaged with the input arm 30 So that the entirety of the direction switching unit 40 rotates about the entry arm 30.

A pair of the support protrusions 41c is protruded from the hollow rotary body 41a so that the guide roller 42 is rotatably engaged.

As described above, the direction switching unit (40) is switched by the rotation operation unit (60).

At this time, the auxiliary guide member 35 protrudes more outward with respect to the center of the through hole 31 than the rotation locus of the direction switching unit 40, Is disposed through the member (35).

Therefore, the rotation drive shaft 61 having a long length can be stably rotated without being warped by the auxiliary guide member 35. [

The auxiliary guide member 35 is formed with a plurality of seating grooves 36 in which the wire saws 50 whose directions are switched by the direction switching unit 40 are seated in the through holes 31.

Therefore, the wire saw 50 can be more accurately and stably transported in a predetermined locus in a state of being seated in the seating groove 36. [

Hereinafter, the operation of the present invention and the method of cutting the rock wall will be described.

The rock cutting method for excavation according to the present invention comprises a side cutting step, an inserting step, a back side cutting step, a drawing step, and a tunnel cutting step.

In the side cutting step, the rotary wire saw 50 is moved in the depth direction of the rock wall to form a straight cut-away portion 82, which is repeatedly performed to form a closed loop-shaped cut-out 82 on the rock wall, The rock block 80 separated from the rock wall by the incision 82 is formed.

More specifically, a perforation hole 81 is formed in the rock wall by using a separate drill or the like as shown in Fig. 7 (a).

In this embodiment, four perforation holes 81 are formed in the rock wall.

Thereafter, as shown in FIG. 7 (b), the entrance arm 30 of the rock cutting apparatus for excavation is inserted into the two perforation holes 81.

At this time, the entry arm 30 can rotate independently of the main body 10, and even if the plurality of the perforation holes 81 are formed to be twisted with each other, It can be inserted into the hole 81 well.

More specifically, after one end of the arm 30 is freely rotatable with respect to the main body 10, the arm 30 is inserted into the perforation hole 81.

When the insertion arm 30 is twisted in the perforation hole 81, the insertion arm 30 is inserted into the body 10 while rotating with respect to the body 10.

When the insertion arm 30 is completely inserted into the perforation hole 81, the insertion arm 30 is fixed to the main body 10 so as not to rotate.

The wire saw 50 is turned by the direction switching unit 40 so as to be in contact with the surface of the rock wall.

After the insertion arm 30 is installed in the perforation hole 81 as described above, the wire saw 50 is transported using the driving unit 20.

As the tension of the wire saw 50 is transferred by the driving unit 20, the wire saw 50, which is in contact with the surface of the rock wall as shown in FIG. 8, .

As shown in FIG. 9 (a), the cut-away rock wall is formed with one incision 82 on the rock wall when viewed from the front.

As shown in FIG. 9 (b), the rectangular block 80 is formed by repeating the above-mentioned cutting process, and the rock block 80 to be separated from the rock wall is formed inside the rectangular cut- .

At this time, the rock block 80 is coupled to the rock wall at the back side in the state shown in FIG. 9 (b).

Therefore, the back surface of the rock block 80 must be cut.

The inserting step is a step of inserting the conveying member 70 into the lower part of the rock block 80 through the incision 82 as shown in FIG. 9 (c).

A roller or the like is attached to a lower portion of the conveying member 70 as shown in FIG. 10, so that the rock block 80 can be easily conveyed.

In the inserting step, the conveying member 70 is inserted into the incision 82 at the lower part of the incision 82.

The backside cutting step is a step of separating the rock block 80 from the rock wall by cutting the back surface of the rock block 80 whose back surface is coupled to the rock wall using a wire saw 50.

Specifically, the back surface of the rock block 80 should be cut by a method as shown in Figs. 9 (d) and 9 (e).

First, the direction switching unit 40 is rotated as shown in FIG. 6 using the rotation operation unit 60.

9 (d), the wire saw 50 is arranged on the upper side and the side of the cut-away portion 82 in a rectangular shape, and the entry arm 30 is inserted into the lower perforation hole 81 Insert it.

By the above process, the wire saws 50 are arranged in a substantially '∩' shape along the cut-outs 82.

At this time, the direction switching unit 40 is rotated by the rotation operation unit 60 and then stopped to maintain the state.

As the wire saw 50 is transported by the driving unit 20, the wire saw 50 located at the upper portion of the rock block 80 gradually descends as shown in FIG. 9 (d) Accordingly, the wire saw 50 cuts the back surface of the rock block 80.

The withdrawing step is a step of withdrawing the separated rock block 80 from the rock wall using the conveying member 70.

The rock block 80 separated from the rock wall is loaded on the upper surface of the conveying member 70 when the back surface cutting step is completed.

Therefore, when the operator pulls the conveying member 70 as shown in FIG. 10, the rock block 80 mounted on the upper surface of the conveying member 70 is mounted on the lower portion of the conveying member 70 And is easily drawn out from the state of being loaded on the conveying member 70 by a roller or the like.

The tunnel incision step is a step of forming an arch-shaped tunnel incline reduction 82 by using the wire saw 50 along the shape of a tunnel to be formed by blasting explosives and the like.

The tunnel cutting step may include forming a plurality of perforation holes 81 in the rock wall and cutting the space between the perforation holes 81 by using the wire saw 50, It is possible to form the incision improvement 82.

By the tunnel incision improvement (82), a tunnel shape to be formed at the time of explosion explosion can be formed more easily and accurately, and the impact is blocked by the tunnel incision (82) Can be prevented.

With the rock cutting apparatus for excavation according to the present invention, the rock block 80 can be easily cut and separated from the rock wall prior to the blasting of the rock wall.

Although the tunnel excavation has been described as an example in this embodiment, blasting vibration can be reduced by applying the present invention even when excavating not only a tunnel but also a basement.

The present invention is not limited to the above-described embodiments, but can be variously modified and practiced within the scope of the technical idea of the present invention.

10: Body,
20:
30: entry arm, 31: through hole, 35: auxiliary guide member, 36:
The present invention relates to a ring gear and a ring gear, and more particularly, to a ring gear,
50: wire saws,
60: rotation operation portion, 61: rotation drive shaft, 62: operation lever, 63: pinion gear.
70: conveying member,
80: Rock block, 81: Perforated hole, 82: Section improvement.

Claims (11)

A body;
A driving unit for driving the wire saw;
A plurality of entry arms formed in a bar shape and having one end coupled to the front of the main body and the other end projecting forward;
A direction switching unit rotatably coupled to the other end of the entry arm;
A closed loop type wire saw installed along the driving unit, the entry arm, and the direction switching unit;
And a rotation operation unit for rotating the direction switching unit with respect to the entry arm,
The wire saw moves by the operation of the driving unit, the tension of the wire saw is adjusted by the forward and backward movement of the driving unit,
A penetrating hole in which the wire saw is disposed is formed in the entrance arm,
Wherein the wire saw passes through the through hole formed in the entry arm and is then turned by the direction switching unit,
Wherein,
A bracket rotatably coupled to the other end of the entry arm about the longitudinal direction of the entry arm; A guide roller coupled to the bracket and rotating about a center axis in a direction perpendicular to the longitudinal direction of the entry arm; And an auxiliary roller disposed parallel to the guide roller and rotatably coupled to the bracket,
The wire saw passes between the guide roller and the auxiliary roller,
The wire saw passing through the through-hole is turned in contact with the guide roller,
Wherein the direction switching unit is rotated with respect to the entry arm by the rotation operation unit,
The rotating operation unit includes:
A rotary drive shaft installed along the entry arm;
An operating lever mounted on one end of the rotary drive shaft;
And a pinion gear mounted on the other end of the rotary drive shaft,
The bracket
A hollow rotating body rotatably coupled to the other end of the arm and having a ring gear on an outer circumferential surface thereof;
And a pair of support protrusions protruding from the hollow rotating body and rotatably coupled with the guide roller,
Wherein the pinion gear and the ring gear are meshed with each other, and the direction switching unit is rotated about the input arm by rotation of the pinion gear. delete The method according to claim 1,
Wherein the through hole is formed at the center of the entry arm,
Wherein a central axis of the guide roller is disposed at a position eccentric from the through hole, and the guide roller rotates together with the bracket around the through hole when the bracket rotates. The method of claim 3,
Wherein an outer circumferential surface of the guide roller contacting the wire saw penetrating through the through hole is biased in the same direction as the through hole or in a direction in which the direction of the wire saw is switched. delete delete delete The method according to claim 1,
And an auxiliary guide member coupled to the outer circumferential surface of the entry arm,
Wherein the auxiliary guide member protrudes more outward with respect to a center of the through hole than a rotational locus of the direction switching unit,
Wherein the rotary drive shaft is disposed through the auxiliary guide member. The method of claim 8,
Wherein the auxiliary guide member is formed with a plurality of seating grooves on which the wire saws whose directions are switched by the direction switching unit are seated in the through holes. The method according to claim 1,
Wherein one end of each of the entry arms is pivotally coupled to the body independently of each other. A method of rock cutting for excavation using the rock cutting apparatus for excavation according to claim 1,
The rotary wire saw is moved in the depth direction of the rock wall to form a straight cut-out, which is repeatedly performed to form a closed loop shape cut-out on the rock wall, and forming a rock block separated from the rock wall by the cut- A side cutting step;
An inserting step of inserting a conveying member into a lower portion of the rock block through the incision;
A back surface cutting step of cutting the back surface of the rock block, the back surface of which is coupled to the rock wall, using a wire saw to separate the rock block from the rock wall;
A drawing step of drawing the rock block separated from the rock wall from the rock wall using the conveying member;
And a tunnel incision step of forming an arched tunnel incision using a wire saw along the shape of the tunnel to be formed by blasting,
A roller is mounted on a lower portion of the conveying member,
The rock block separated from the rock wall in the back surface cutting step is loaded on the upper surface of the conveying member disposed below the rock block, and then the conveying member is pulled from the rock wall in a state of being stacked on the conveying member by pulling Is pulled out.

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