WO2012058705A2

WO2012058705A2 - Tunneling machine

Info

Publication number: WO2012058705A2
Application number: PCT/AT2011/000446
Authority: WO
Inventors: Manfred Meier; Franz Wels; Karl Lerchbaum; Uwe Restner; Bernhard Ebner; Hubert Kargl; Ralf Grief
Original assignee: Sandvik Mining And Construction G.M.B.H.
Priority date: 2010-11-05
Filing date: 2011-11-03
Publication date: 2012-05-10
Also published as: RU2571471C2; AU2011325847B2; DE112011103661A5; AT510657A1; PL404916A1; CN103299033A; RU2013125768A; AU2011325847A1; AT510657B1; WO2012058705A3; CN103299033B; ZA201303815B; PL226380B1

Abstract

The invention relates to a tunneling machine comprising a base frame (2) having a chassis, and a bracket (4) which can be horizontally and vertically swiveled and is provided with a cutting device (8) that has at least one tool support (10, 11). Said tool support is rotatably mounted on the bracket (4) and can be driven so as to rotate and carries a plurality of cutting tools (12) on its circumference. The cutting device (8) comprises at least two parallel disk-shaped tool supports (10, 11) which are rotatably mounted on an end section (13) of the bracket (4) that is located between the tool supports (10, 11) and is at least partially disk-shaped.

Description

Mining machine

The invention relates to a track boring machine comprising a base frame comprising a chassis and a cantilever arm pivotable in the horizontal and in the vertical direction, which is provided with a cutting device which has at least one tool carrier rotatably mounted on the cantilever arm and rotatable for rotation Wearing cutting tools.

The invention further relates to a method for propelling a route underground using a Streckenvortriebsmaschine.

Jacking machines of the type mentioned are known as Teilschnittschrämmaschinen and in at least two different types commonly used, in both cases, a boom is set on all sides pivotally mounted on a machine frame. In a first type, cutting rollers or cutting heads are rotatably mounted transversely to the longitudinal axis of the cantilever arm on a cantilever arm, which are guided transversely to its axis of rotation in the vertical direction over the working face and are used in this way for the degradation or recovery of materials. Such cross-cutting heads are characterized as well as cutting rollers essentially by the fact that the bit wear can be optimized by appropriate positioning and adjustment of the angle relative to the direction of rotation, which when working with such Teilschnittschrämmaschinen first Einbrechschrämvorgang is required, in which the cutting heads in the direction of the axis of the Ausler- arm must be inserted into the working face to auszuschrämen a burglary, starting from which then the face can be swept over.

In a second type, so-called longitudinal cutting heads are used, which have an axis of rotation which is substantially parallel to the axis of the cantilever arm or aligned with the axis of the cantilever arm. Even with such longitudinal cutting heads Einbruchschrämen is required before the actual mining operation, in which case the longitudinal cutting heads must work in the direction of its axis of rotation in the working face to ensure a corresponding burglary, starting from then the pivoting of the boom with the rotating Längsschneidköpf on the working face takes place and the degradation can be made.

A disadvantage of the types described is that they are not suitable for use at low line height due to their relatively large height. Without special adaptations, the types described can not be used for the mining of very hard rock.

For use in particularly hard rock, special types have become known in which, for example, disk tools are provided which operate according to the undercutting principle. Such a machine can be found, for example, in AT 506502 A2. This machine has a rotatably mounted on a pivotable in the vertical direction cantilever arm mounted cutting wheel, wherein the axis of rotation of the cutting wheel is transverse to the longitudinal axis and the pivot axis of the cantilever arm. The cutting wheel comprises a disc-like tool carrier having a plurality of disc tools, a majority of which is oriented towards the sole. During the cutting process, first an input Break made on the ridge, whereupon the boom with the cutting wheel after the undercutting principle cuts to the bottom. WO 2010/050872 A1 likewise describes a tunneling machine with a cutting wheel which carries disc tools at its circumference. The cutting wheel is rotatably mounted on a cantilever arm, which is pivotable both in the vertical direction and in the horizontal direction. In a first embodiment, the axis of rotation of the cutting wheel extends in the horizontal direction and in a second embodiment in a substantially vertical direction.

The invention now aims to provide a Streckenvortriebs- machine for hard rock use, which is suitable for low profile sections and can be cut with the differently shaped profiles, in particular different widths and different high profiles without requiring an adaptation of the machine. The invention further aims to increase the cutting performance in hard rock.

To achieve this object, the track driving machine of the aforementioned type according to the invention substantially further developed such that the cutting device has at least two mutually parallel disc-shaped tool carrier, which are rotatably mounted on a arranged between the tool carriers, at least partially disc-shaped end portion of the boom.

Since the tool carriers are now disc-shaped, the requirement of the low overall height of the section boring machine can be taken into account in a simple manner. Because now at least two parallel to each other ange- arranged disc-shaped tool carrier are provided, the cutting performance is improved and at the same time ensures a common storage of the two tool carrier on a arranged between the tool carriers, at least partially disc-shaped end portion of the cantilever arm in a simple manner. In this case, the tool carriers are in this case mounted rotatably in particular exclusively on the said end region of the extension arm arranged between the tool carriers, and this is therefore a so-called flying bearing. From a flying storage is when the tool carrier is mounted only on one side, so an opposite second bearing is not available. This leads to a particularly flat construction. In addition, a storage of the tool carrier is avoided on the respective outer sides, so that, for example, a tool carrier encompassing frame or the like, which would be required for such storage, can be omitted. This not only saves space, but in particular the fact that the cutting tools can be effective with suitable positioning up to the edge of the cutting device.

Characterized in that the cantilever arm is arranged pivotable both in the horizontal and in the vertical direction, the track boring machine according to the invention can be used for different widths and different high section profiles, without the need for a structural adaptation of the machine. The cantilever arm is preferably mounted on a carriage which is displaceably guided relative to the base frame in the machine longitudinal direction, whereby a collapse into the working face is made in a simple manner and then by means of pivoting of the boom can be removed corresponding to the depth of the burglary corresponding rock layer.

If, as this corresponds to a preferred development, the tool carriers are rotatably mounted on the cantilever arm about a rotation axis extending perpendicular to the horizontal pivot axis of the cantilever arm and transversely to the machine longitudinal direction, the break-in takes place at the lateral impact of the section profile and then the cantilever arm pivots laterally according to the route profile width. This arrangement of the tool carrier leads to a very low machine height, so that the machine can also be used for low route profiles.

The cutting tools are arranged on the two tool carriers in such a way that they intersect two grooves separated by a rock rib into the working face, the burglary depth being dependent on which diameter the bearing of the two tool carriers is offset compared to the cutting circle diameter. In order to be able to safely remove the remaining rock rib after a cutting process in which two grooves are cut corresponding to the cutting thickness of the individual tool carriers, a preferred embodiment provides that the cutting thickness of the individual disk-shaped tool carriers defined by the cutting tools is the same for both tool carriers is larger than the crest remaining between the two tool carriers. The cutting away of the remaining rock rib takes place here in that the cutting device is offset in a Nachschneidvorgang in the vertical direction used. Although the use of discs as cutting tools within the scope of the invention is conceivable in principle, it has been observed that the cutting performance always remains limited when using discs operating on the undercutting principle. In order to increase the cutting performance, especially in the case of hard rock, a preferred development therefore provides that the cutting tools comprise disc packs or rollers which are each rotatably mounted in a bearing rigidly fastened to the tool carrier, the disc packs or rollers having on their circumference Variety of preferably extending in the circumferential direction rows arranged cutting inserts wear. Due to the fact that the rollers or disc packets have a plurality of rows of cutting inserts on their circumference, the cutting principle is not used, but the cutting inserts formed in particular by cemented carbide inserts break the rock due to the cutting forces introduced substantially perpendicularly to the working face. The preferably provided disc packs or rolls, which carry a plurality of cutting inserts on their circumference, are also used, for example, in so-called raise borers, wherein in such cutting tools the cutting inserts or the rows of cutting inserts can be arranged so close to each other that result in very small cutting line spacings between the individual cutting rings and thus a higher cutting performance can be achieved even with hard rock.

For the rotatable mounting of the disc packs or rollers on the tool carrier, a bearing is required which has a corresponding space requirement, in particular in the axial direction of the tool carrier, so that the cutting inserts of the disc packs or rollers can not reach the edge of the tool carrier to effect and this in particular in particular when rotational axes of the disc packs or rollers run parallel to the axis of rotation of the tool carriers. In order to remedy this situation, a preferred embodiment provides that a plurality of disc packs or rolls with parallel to the axis of rotation of the tool carrier axis of rotation and a plurality of disc packs or rolls are provided with the axis of rotation of the tool holder inclined axis of rotation extending on the tool carriers. The rollers or disk tools formed with an inclined rotation axis can be made obliquely outwards or inwards, so that the required free cut is made in the individual tool carriers. An optimized geometry can be achieved in this case in that the disk blocks or rollers having an inclined rotation axis have a frustoconical starting or enveloping surface.

In order to be able to safely absorb the high cutting forces, a further preferred embodiment provides that the base frame has extendable punches against the ridges and the sole in order to clamp the road-boring machine within the track.

According to a second aspect of the invention, there is provided a method for propelling a subterranean track with tunneling machines, characterized in that a cutting device rotatably mounted on a boom and drivable for rotation comprises at least two disc-shaped tool carriers arranged parallel to one another the tool carriers arranged, at least partially disc-shaped end portion of the cantilever arm are rotatably mounted, preferably at the lateral impact is attached to the working face, that by advancing the cantilever arm in the machine longitudinal direction After that, the cantilever arm is laterally pivoted in a first cutting operation, whereby two parallel grooves separated by a rock rib are cut, whereupon, after the cutting device has been pulled out, the laying arm pivots out of the cut grooves in the vertical direction and in one to the the first cutting operation offset in the vertical direction position is applied to the working face, that by cutting the boom in the machine longitudinal direction a burglary is cut and that in a subsequent second cutting operation by lateral pivoting of the boom two parallel grooves are cut, which are cut to those in the first cutting operation parallel grooves are offset such that the remaining in the first cutting rock rib is cut away.

The invention will be explained in more detail below with reference to exemplary embodiments shown schematically in the drawing. 2 shows the cutting tools of the cutting device of the tunnel boring machine according to FIG. 1, FIG. 3 shows a detailed view of the cutting tools according to FIG. 2 and FIGS. 4a and 4b shows a representation of the mining method in one Top view of the range.

In Fig. 1, a route driving machine 1 is shown, which has a base frame 2 with a crawler undercarriage 3 up. The extension arm is denoted by 4 and is guided according to the double arrow 5 in the machine longitudinal direction displaceable on the base frame 2. The boom 4 is pivotally mounted about a vertical axis 6 by means of a horizontal pivoting mechanism, not shown. The front portion of the boom 4 is pivotally mounted about a horizontal axis 7 by means of a vertical pivoting mechanism, not shown. The cantilever arm 4 can be pivoted in this manner both in the horizontal and in the vertical direction relative to the base frame 2. On the boom 4, a cutting device 8 is rotatably mounted about a pivot axis 9, wherein a non-illustrated rotary drive drives the cutting device 8 for rotation about the axis 9. The cutting device 8 has two tool carriers 10 and 11 which each have a multiplicity of cutting tools 12 on their circumference. The cutting tools 12 will be described in more detail with reference to Figures 3 and 4 in the sequence.

In Fig. 1 it can be seen that the tool carrier 10 and 11 are disc-shaped, wherein an at least partially disc-shaped end 13 of the cantilever arm 4, the storage of the tool carrier 10 and 11 has. The end section 13 of the extension arm 4 is arranged between the two tool carriers 10 and 11, so that a distance 14 remains between the tools 12 of the tool carriers 10 and 11. When cutting the rock, the cutting tools 12 attached to the tool carriers 10 and 11 thus produce two grooves extending parallel to one another, between which a rock rib remains in the region 14.

In Fig. 1 it is further apparent that the base frame 2 of the tunneling machine 1, a loading device 15 is fixed, with which the removed rock is collected and transferred to a extending in the machine longitudinal direction discharge device. The tunneling machine 1 has at its rear end a prominent Über- 16 on which the mined rock is transferred to a trailing unit 17. The trailing unit 17 has its own crawler undercarriage 18 and serves, for example, to receive schematically indicated energy aggregates 29. From the rear end of the trailing unit 17 protrudes a discharge conveyor 19, which transfers the removed rock to a track conveyor. The trailing unit 17 further has a loading table 20 with which excavated rock, which was not picked up by the main loading device 15, can be detected.

Due to the horizontal arrangement of the disc-shaped tool carrier 10 and 11, a very low overall height of the tunneling machine 1 is achieved and it is particularly apparent that the overall height of the tunnel boring machine 1 is not more than 1.2 to 1.5 times that in the direction of the axis of rotation. 9 measured extent of the cutting device 8 is.

In FIGS. 2 and 3 it can be seen that a multiplicity of cutting tools 12 are arranged on the circumference of the tool carrier 10 or 11, whereby all cutting tools are formed by disk packets, on whose circumference a multiplicity of projecting cutting inserts 21 are arranged, and that the cutting inserts are arranged in circumferentially extending parallel rows. The disc packets are rotatably mounted about an axis 27 and 28 in brackets 22, wherein cutting tools 12a are provided with the rotation axis 9 of the tool carrier 10 and 11 parallel rotation axis 27 and cutting tools 12b and 12c with inclined in different directions rotation axes 28. The cutting tools 12b are directed obliquely outward, the cutting tools 12c are directed obliquely inwards, where 4, it can be seen that such an arrangement results in that the cutting tools with their cutting inserts 21 can reach over the entire height of the disk-shaped tool carriers 10 and 11 to the effect. The cutting tools 12a, 12b, 12c are arranged alternately with different orientation of their axis of rotation, so that it is avoided that two cutting tools 12, which have the same orientation of their axis of rotation are arranged directly behind one another.

The mode of operation of the track-boring machine 1 according to the invention will now be explained in more detail with reference to FIGS. 4a and 4b. At the beginning of the cutting process (FIG. 4 a), a collapse is made on the lateral joint 23 of the section profile by advancing the extension arm in the direction of the arrow 24 in the direction of the working face, so that the cutting device 8 penetrates, for example, 50 cm deep into the working face 25. The maximum burglary depth is reached when the disc-shaped end portion 13 of the cantilever arm comes to rest on the rock rib formed in the region 14. Thereafter (FIG. 4b), the cutting device 8 is pivoted by pivoting the extension arm 9 in the direction of the arrow 26 over the working face, whereby two parallel grooves are formed in the rock. The process described is then repeated, but the cutting device 8 is applied offset in the vertical direction to the application, so that the remaining in the first cutting gear gear is removed.

Claims

claims

1. Track boring machine comprising a base frame comprising a chassis (2) and a horizontal and in the vertical direction pivotable boom (4) which is provided with a cutting device (8), the at least one rotatably mounted on the boom (4) and driven for rotation Tool carrier (10,11), which carries at its periphery a plurality of cutting tools (12), characterized in that the cutting device (8) has at least two mutually parallel disc-shaped tool carrier (10,11), which at one between the tool carriers (10,11) arranged, at least partially disc-shaped end portion (13) of the Ausle- gerarmes (4) are rotatably mounted.

2. Track boring machine according to claim 1, characterized in that the cutting tools (12) comprise disc packs or rollers which are each rotatably mounted in a bearing rigidly mounted on the tool carrier bearing, the disc packs or rollers at its periphery a plurality of preferably in in the circumferential direction rows arranged cutting inserts (21) wear.

3. Track boring machine according to claim 2, characterized in that on the tool carriers (10,11) each have a plurality of disc packets (12a) or rollers with parallel to the rotation axis (9) of the tool carrier (10, 11) extending axis of rotation (27) and a A plurality of disc packs (12b, 12c) or rollers with an axis of rotation (9) of the tool carrier (10, 11) inclined to the axis of rotation (28) are provided.

4. stretch driving machine according to claim 3, characterized in that the inclined axis of rotation (28) having disc packets (12 b, 12 c) or rollers have a frustoconical peripheral or envelope surface.

5. Track boring machine according to one of claims 1 to 4, characterized in that the by the cutting tools (12) defined cutting thickness of the individual disc-shaped tool carrier (10,11), which in both tool carriers (10,11) is in particular the same, larger is as the thickness of between the two tool carriers (10,11) arranged end portion (13) of the cantilever arm (4).

6. Stretching machine according to one of claims 1 to 5, characterized in that the tool carrier

(10,11) about a perpendicular to the horizontal pivot axis (7) of the cantilever arm (4) and extending transversely to the machine longitudinal axis of rotation (9) are rotatably mounted on the cantilever arm (4).

7. Stretching machine according to one of claims 1 to 6, characterized in that the boom arm (4) is mounted on a relative to the base frame (2) in the machine longitudinal direction slidably guided slide.

8. Stretching machine according to one of claims 1 to 7, characterized in that the base frame (2) against the ridges and the sole retractable punch has to clamp the Streckenvortriebsmaschine within the stretch bridge.

9. A method for propelling a route underground with a route driving machine according to one of claims 1 to 8, characterized in that a rotatable on a Cantilever mounted and driven for rotation cutting device with at least two mutually parallel disc-shaped tool carriers, which are rotatably mounted on an arranged between the tool carriers, at least partially disc-shaped end portion of the cantilever arm, preferably at the lateral impact is applied to the working face, that by Advancing the boom in the machine longitudinal direction a break is cut, that the boom is then laterally pivoted in a first cutting operation, whereby two parallel, are separated by a rock rib grooves, whereupon the boom pivots after pulling the cutter from the cut grooves in the height direction and in a position offset in the height direction for the first cutting operation in such a way is applied to the working face, that by advancing the boom in the machine longitudinal direction a burglary is cut u nd that in a subsequent second cutting operation by lateral pivoting of the boom arm two parallel grooves are cut, which are offset from the cut in the first cutting parallel grooves such that the remaining in the first cutting rock crest is cut away.