GB2144786A

GB2144786A - Mining machines

Info

Publication number: GB2144786A
Application number: GB08327022A
Authority: GB
Inventors: Herbert Obermaier; Alfred Zitz
Original assignee: Voestalpine AG
Current assignee: Voestalpine AG
Priority date: 1982-10-14
Filing date: 1983-10-10
Publication date: 1985-03-13
Also published as: DE3334975C2; DE3334975A1; AU566892B2; AT377573B; AU1982783A; ZA837169B; GB2144786B; GB8327022D0

Abstract

An anchor bore boring and, optionally, anchor positioning machine (2) is pivotally linked to a cutting machine (1) and connected with the cutting machine (1) via a horizontally movable mounting (9). In operative position, the anchor born boring and, optionally, anchor positioning machine (2) can be locked in position by means of a prop (3) relative to the floor and the roof. The prop (3) is guided within the mounting (9) for being movable in height direction. The horizontally movable mounting (9) is formed of guide rods or of a telescoping arm which can be swivelled around a vertical axis (10). <IMAGE>

Description

SPECIFICATION Apparatus for making anchor bores and optionally for positioning anchors for the purpose of safeguarding the roof of underground cavities The invention refers to an apparatus for making anchor bores and for optionally positioning anchors for the purpose of safeguarding the roof in underground cavities, for example drifts, driven by means of a movable cutting machine, in particular a partial cut cutting machine, said apparatus comprising an anchor bore boring and, optionally, anchor positioning machine. Consolidation of drifts or tunnels is, as a rule, effected behind the cutting machine and the roof is not secured at the area of the advance working machine. This implies a danger for the driver of the cutting machine but has the advantage that cutting work need not be interrupted when actuating the anchor bore boring and anchor positioning machine.It has also been proposed to safeguard the roof in proximity of the drift face by means of anchors, for which purpose an anchor bore boring and anchor positioning device was provided on the cutting machine, for example on the swing gear or on a boom of a partial cut cutting machine.

This requires, however, an interruption of the operation of the cutting machine, because in this case the anchor bore boring and anchor positioning machine can only be operated with the cutting machine being not operated.

It is an object of the invention to provide the possibility to operate the anchor bore boring and, respectively, anchor positioning machine during operation of the cutting machine and to safeguard in spite thereof the roof above the cutting machine.

For this purpose, the invention essentially consists in that the anchor bore boring and, optionally, anchor positioning machine is connected with the cutting machine for being universally movable relative thereto in horizontal direction, i.e. in a direction parallely extending relative to the supporting surface of the caterpillars (RTM) or the like, for a limited extent by means of a mounting movable relative to the cutting machine in horizontal direction, in that said boring and positioning machine is, in operating position, located outside of the contour of the top-plan view of the cutting machine and is adapted for being supported against the floor and is adapted for being secured against displacement relative to the roof and in that said boring and positioning machine can, in non-operative position, be disengaged or lifted from the roof and from the floor.

In view of the anchor bore boring and anchor positioning machine being connected with the cutting machine, the boring and positioning machine is trailed by the cutting machine. In view of the boring and positioning machine being located outside the contour of the top-plan view of the cutting machine, the boring and positioning machine can be supported against the floor in operating position. In view of the boring and positioning machine being movable relative to the cutting machine in a horizontal plane, the cutting machine itself can be moved or displaced during operation of the anchor bore boring and anchor positioning machine without detracting from the operation of the anchor bore boring and anchor positioning machine. The invention thus prevents interruptions of operation when making the anchor bores and, optionally, also when positioning the anchors.

Conveniently and according to the invention, at least one anchor bore boring and, optionally, anchor positioning machine is arranged on each of both long panes of the cutting machine. Anchor bores can thus be made and, respectively, anchors can be positioned at both sides of the cutting machine while it is working, so that the drift roof or mine roof can be consolidated or safeguarded to such an extent that caving in above the cutting machine can be avoided.

According to the invention it is, however, also possible to arrange in an analogous manner such an anchor bore boring and anchor positioning machine behind the cutting machine approximately at its longitudinal axis.

According to a preferred embodiment of the invention, the anchor bore boring and, optionally, positioning machine is rigidly connected with a prop adapted to be, conveniently hydraulically, positioned between floor and roof, said prop being guided within the mounting for being movable in height direction and perpendicularly relative to the supporting surface of the caterpillar or the like. By means of this prop, the anchor bore boring and positioning machine is prevented from becoming displaced relative to the roof, so that the drill is precisely guided during making the bores and breaking out of the bore wall, which would adversely effect positioning of the anchor, is prevented.

Anchor bore boring and positioning machines are known per se. Such machines allow to make the anchor bore and to subsequently position the anchor, the anchors being taken one after the other from an anchor magazine. Such a machine can be used in an apparatus according to the invention.

According to the invention, the arrangement is preferably such that the anchor bore boring and, optionally, positioning machine is in non-operative position maintained, with respect to the cutting machine, in a foreward starting position and is in operative position rearwardly movable relative to the cutting machine. This provides a long advancing path of the cutting machine while the anchor bore boring and positioning machine is secured in its operative position. In the starting position, in which the anchor bore boring and positioning machine is out of engagement with the roof and with the floor, the anchor bore boring and positioning machine need not be located outside of the contour of the top plan view of the cutting machine.It is possible to displace the cutting machine to a position outside of this contour only if the cutting machine shall be brought into the operative position. According to the invention, the mounting can, in non-operative position, be movable relative to the cutting machine by means of a forcibiy actuable linkage, for example by means of a piston-cylinder-aggregate.

According to the invention, the anchor bore boring and, optionally, positioning machine or, respectively the prop is conveniently supported against down ward movement by means of a spring supported against the mounting. This provides in a simple manner the possibility to lift the machine in nonoperative position off the floor so that the cutting machine can be moved in an unobstructed manner from one anchor position to the other.

According to the invention, the mounting may comprise a telescoping arm pivotally linked to the cutting machine for being swivelled around a vertical axis. Such a mounting allows movement of the cutting machine relative to the anchor bore boring and positioning machine fixed in its operative position. In this case and according to the invention, a telescoping strut pivotally linked to the cutting machine can be pivotally linked to the telescoping arm, the telescoping movement of the telescoping arm and ofthetelescoping strut being lockable. In operative position of the anchor bore boring and positioning machine, the telescoping arm and telescoping strut are freely shiftable, so that free mobility is warranted in operating position.By blocking the telescoping arm and the telescoping strut, the anchor bore boring and positioning machine can be arrested in its non-operative position and thus be prevented from swivelling in an uncontrolled manner. In this case and according to a preferred embodiment of the invention, the telescoping arm and the optionally provided telescoping strut are hydraulic cylinder-piston-aggregates, the working spaces of which can be depressurized in the operative position of the anchor bore boring and, optionally, positioning machine. Such depressurizing can be effected in a simple manner by connecting the working spaces of the piston-cylinder-aggregates with the return conduit.

According to an other embodiment of the invention the mounting may comprise guide rods pivotally linked one with the other and to the cutting machine for being swivelled around vertical axes, the free end of the last guide rod carrying the guide means for vertically guiding the prop or, respectively, the anchor bore boring and, optionally, positioning machine. Also such an arrangement of guide rods provides free mobility of the anchor bore boring and positioning machine assuming operative position relative to the cutting machine, noting that also in this case the arrangement of guide rods can be blocked if the anchor bore boring and positioning machine assumes a non-operative position, for example the starting position.

In the drawing, the invention is schematically illustrated by embodiments.

Figures 1 and 2 show the anchor bore boring and positioning machine arranged on a cutting machine, noting that the cutting machine is only shown by its contour, Figure 1 being a side elevation and Figure 2 being a top plan view. Figure 3 shows in an enlarged scale and in a side elevation and partially in a section the anchor bore boring and positioning machine and its mounting. Figure 4 shows a modified embodiment of the mounting of the anchor bore boring and positioning machine. Figure 5 shows schematically and in a section a drift with the anchors having been positioned.

At both sides of the cutting machine 1, there is provided an anchor bore boring and anchor positioning machine 2,3 is a hydraulic prop, the lower portion 4 of which forms the cylinder for the upper portion 5 being designed as the piston. The anchor bore boring and anchor positioning machine 2 is connected with this prop 3 via arms 8. In the representation according to Figures 1 and 2, the prop 3 is positioned against the floor 6 and against the roof 7. The anchor bore boring and anchor positioning machine 2 is thus in operative position. The prop 3 is connected with the cutting machine 1 by means of a telescoping arm 9 for being swivelled in horizontal direction. The telescoping arm 9 is linked to the cutting machine 1 for being swivelled around a vertical axis 10.The other end of the telescoping arm 9 embraces with an eye 11 the lower portion 4 of the prop 3. If now the prop 3 is, in the position shown in Figure 1 and 2, in engagement with the floor 6 and with the roof 7, the cutting machine can forewardly move in direction of the arrow 12 and perform the cutting work, while the prop 3 is rearwardly moved relative to the cutting machine and arrives at the position 3', the telescoping arm 9 being swivelled relative to the cutting machine into the position 9'.

The anchor bore boring and anchor positioning machine 2 is rotatably linked to the prop by means of the arms 8 and can thus rotate relative to the prop 3 on swivelling movement of the telescoping arm 9, the cutting machine thus arriving at the position 2'.

The anchor bore boring and anchor positioning machine 2 can thus perform its work while the cutting machine is advanced and operated.

The prop 3 is in retracted condition lifted off the floor 6 by means of a spring 13 being supported, on the one hand, against the mounting formed of the telescoping strut 9 and, on the other hand, against a collar 14 fixed to the lower portion 4. For providing this possibility, the lower portion 4 is guided within the arms 8 for being moved in height direction. In this manner, the cutting machine can, in nonoperative position of the anchor bore boring and anchor positioning machine 2, be freely moved from one another bore to the other. The telescoping arm 9 is designed as a hydraulic strut, i.e. as a hydraulic piston-cylinder-aggregate. 15 is a hydraulic telescoping strut being pivotally linked at 16 to the cutting machine and at 17 to the telescoping arm 9.If the working spaces of the hydraulic telescoping arm 9 and of the hydraulic telescoping strut 15 are depressurized, the prop 3 can freely be displaced relative to the cutting machine 1 during the anchor bore boring and anchor positioning machine 2 is operating. The arm 9 and the strut 15 can hydraulically be blocked if the anchor bore boring and anchor positioning machine is in non-operative position.

The non-operative position of the anchor bore boring and anchor positioning machine 2 is shown in Figure 3. The prop 3 is retracted and the lower portion 4 is lifted off the floor 6 by the spring 13. In view of the upper portion 5 being retracted, also this upper portion is out of engagement with the roof. An anchor drill 18 is shown on the anchor bore boring and anchor positioning machine 2.

Figure 4 shows a mounting in the form of a lever arrangement. The lever 19 is pivotally linked to the cutting machine for being swivelled around a vertical axis 20. A second lever 22 is pivotally linked to this lever 19 for being swivelled around the vertical axis 21 and is embracing the prop 3 with its free end. The anchor bore boring and anchor positioning machine 2 is in its turn pivotally linked to this prop 3. The cutting machine can thus be moved in direction of the arrow 12 while the prop 3 is placed in position.

Figure 5 shows a view in direction of the drift, the contour of the cutting machine 1 being schematically shown. Both lateral anchors 23 and 24 can be placed in position by means of the anchor bore boring and anchor positioning machine 2 shown in Figures 1 and 2. The anchor 25 is centrally arranged and can thus be placed in position by means of an anchor bore boring and anchor positioning machine arranged behind the cutting machine and connected with this cutting machine in an analogous manner but not being shown in Figures 1 and 2. In spite of the fact that the anchor 25 is being placed in position only behind the cutting machine, the roof is sufficiently safeguarded by means of the anchors 23 and 24.

Claims

1. Apparatus for making anchor bores and op optionally for positioning anchors for the purpose of safeguarding the roof in underground cavities, for example drifts, driven by means of a movable cutting machine, in particular a partial cut cutting machine, said apparatus comprising an anchor bore boring and, optionally, anchor positioning machine, characterized in that the anchor bore boring and, optionally, anchor positioning machine (2) is connected with the cutting machine (1) for being universally movable relative thereto in horizontal direction, i.e. in a direction parallely extending relative to the supporting surface of the caterpillars or the like, for a limited extent by means of a mounting (9) movable relative to the cutting machine (1) in horizontal direction, in that said boring and positioning machine is, in operative position, located outside of the contour of the top plan view of the cutting machine (1) and is adapted for being supported against the floor and is adapted for being secured against displacement relative to the roof (7) and in that said boring and positioning machine can, in non-operating position, be disengaged from the floor (6) and from the roof (7).

2. Apparatus as claimed in claim 1, characterized in that at least one anchor bore boring and, optionally, anchor positioning machine (2) is arranged on each of both long panes of the cutting machine (1).

3. Apparatus as claimed in claim 1 or 2, characterized in that the anchor bore boring and, optionally, positioning machine (2) is rigidly connected with a prop (3) adapted to be, conveniently hydraulically, positioned between floor (6) and roof (7) and in that the prop (3) is guided within the mounting (9) for being movable in height direction and perpendicularly relative to the supporting surface of the caterpil larorthe like.

4. Apparatus as claimed in claim 1, 2 or 3, characterized in that the anchor bore boring and, optionally, positioning machine (2) is in nonoperative positive maintained, with respect to the cutting machine (1), in a foreward starting position and is in operative position rearwardly movable relative to the cutting machine (1).

5. Apparatus as claimed in any of claims 1 to 4, characterized in that the mounting (9) can, in nonoperative position, be moved relative to the cutting machine (1) by means of a forcibly actuable linkage, for example by means of a piston-cylinderaggregate (15).

6. Apparatus as claimed in any of claims 1 to 5, characterized in that the anchor bore boring and, optionally, anchor positioning machine (2) or, re spectivelythe prop (3) is supported against downward movement by means of a spring (13) supported against the mounting (9).

7. Apparatus as claimed in any of claims 1 to 6, characterized in that the mounting (9) comprises a telescoping arm pivotally linked to the cutting machine for being swivelled around a vertical axis (10), the cantilevering end of said telescoping arm carrying a guide means for vertically guiding the prop (3) or, respectively, the anchor bore boring and, optionally, anchor positioning machine (2).

8. Apparatus as claimed in claim 7, characterized in that a telescoping strut (15) pivotally linked to the cutting machine (1) is pivotally linked to the telescoping arm (9) and in that telescoping movement of the telescoping arm (9) and of the telescoping strut (15) can be blocked.

9. Apparatus as claimed in claim 7 or 8, characterized in that the telescoping arm (9) and the optionally provided telescoping strut (15) are hydraulic cylinder-piston-aggregates, the working spaces of which can be depressurized in the operative position of the anchor bore boring and, optionally, anchor positioning machine (2).

10. Apparatus as claimed in any of claims 1 to 9, characterized in that the mounting comprises guide rods (19, 22) pivotally linked one with the other and with the cutting machine (1) for being swivelled around vertical axes, the free end of the last guide rod (22) carrying the guide means for vertically guiding the prop (3) and, respectively, the anchor bore boring and, optionally, anchor positioning machine (2).

11. Apparatus as claimed in claim 10, characterized in that the guide rods (19, 22) can be blocked in a non-operative position.

12. Apparatus as claimed in any of claims 1 to 11, characterised in that an anchor bore boring and, optionally, anchor positioning machine (2) is also provided behind the cutting machine (1) in an approximately central position.