EP0130969B1 - Drilling and bolting apparatus - Google Patents

Description

The invention relates to an anchor drilling and setting device e.g. for mining, tunneling or the like. According to the preamble of the main claim.

In mining, especially coal mining and tunneling, the expansion of the route with adhesive or expansion anchors is becoming increasingly important. When carrying out the method, the procedure is now generally such that one or more boreholes are drilled into the rock with a drilling machine, specifically in the radial or normal direction in relation to the tunnel cross section. Expansion anchors or concrete or a two-component adhesive are then introduced into these boreholes, after which the adhesive anchor is inserted. After the adhesive has hardened, which is the case for a short time in a two-component system, the nuts are tightened at the protruding end of the anchor, a plate being arranged between the rock and the nut in order to avoid superficial destruction of the rock. With such anchors it is now achieved that stresses, in particular compressive stresses, are exerted on the rock, whereby a kind of arch effect is achieved, and the rock of the tunnel or the like forms a kind of self-supporting structure.

An anchor drilling and setting device has already become known, which has a mount, along which the drilling unit or the anchor setting key can be moved alternately with a further motor. At the end of the carriage facing away from the borehole there is a receptacle for the drilling unit or the motor for the anchor setting key, which receptacle extends transversely to this and extends beyond it on both sides. Both the drill motor and the motor of the anchor setting key are located on their own slide and can be moved from a working position on the carriage along the guide to a rest position, after which the other unit can be brought into the working position. This movement of the units must either be done manually or with additional cylinders. Furthermore, this device has an anchor magazine with chain, which can be swung forward so that an anchor can be removed from the magazine if necessary. The unit for the anchor setting and the anchor setting key can be moved from the working position to the rest position without an anchor, whereas the drill must be taken into the rest position during the translational movement from the work, which also requires a displaceable guide for the drill.

This known anchor drilling and setting device is expensive in terms of equipment, since it requires, for example, a drilling unit and a unit for setting the anchor, has a guide arranged transversely to the carriage for the rest position of the units, and is claimed due to the arrangement of the transverse guide, the anchor magazine and the insertion tube for the Adhesive has a large volume, which means that use in mining is limited. Furthermore, there is a particularly high susceptibility to malfunction due to the additional lateral guidance, so that the operator has to return to the undeveloped area of the route in order to bring the device back into operation, or the entire carriage must be removed from the undeveloped route and after repairing the Anchor drilling and setting equipment of the wagons are brought back into the undeveloped line and realigned there.

According to FR-A-2 402 059 and US-A-4 229 124, anchor drilling and setting devices are known which have a mount, have a drilling arm with a carriage and can be connected to a cutting machine. A rotary impact motor can be moved to the drilling site on a sled along the carriage. Furthermore, a movable boring bar guide is provided as well as a swiveling anchor magazine with anchor holder for setting the anchor. A disadvantage of both versions is that the anchor magazine and the boring bar guide, which can be pivoted about a common axis, do not have the same distance, so that the machine must also be adjusted after each change of the tool.

This results in an unbearable additional workload. Nor is it suggested how an anchor key can be used to save time.

Furthermore, according to DE-A-28 42 788, an anchor magazine for a rock anchor setting device is known, which can be used to support the ridge of a mine tunnel or the like. It is used to hold and advance the anchors. A housing attached to the support of the tower, which carries synchronously drivable endless chains which have protruding claws which serve to hold and advance the anchors into the axis of the anchor setting slide.

Also known from DE-B-22 22 646 is an adhesive replacement device with a mount, on which a drilling device and an anchor setting device are arranged so as to be longitudinally displaceable, a mount holder being braced against the roof and a carrier device by a tensioning cylinder and the mount being pivotable about the axis of the tensioning cylinder and is adjustable parallel to this axis. The insertion of the adhesive cartridges into the anchor hole is mechanized and the prerequisite for an automatic sequence of the adhesive anchor setting process is attempted by pivoting the mount around the axis of the tensioning cylinder in three operating positions, namely one for an anchor hole, the next one for a cartridge setting device and another for the insertion of the anchor rod. A swivel device is also provided here, which is intended to mechanize the individual work processes.

Likewise, according to EP-A-0 034134 is an anchor Setzvor direction become known, which is arranged on an adjustable mast and can be pivoted into the various operating positions and uses a rock drill or an anchor setting device as required, which can be moved on a sled and carry out the feed.

Finally, according to EP-A-0 020 271, the engagement and disengagement cylinders acting in the direction of the carriage are known. This means that the tools on the carriage can be brought in or taken back for use.

However, all these devices have the disadvantage in common that only some of the required tools are mechanized and screwing tools still have to be operated manually. This means that the operator has to work in the dangerous undeveloped area.

The object of the present invention is now to provide an anchor drilling and setting device which allows the entire working process to be carried out mechanically from a single protected location and not only to produce the drilling tools but also the anchor hole and to introduce the adhesive, to anchor and pull it too. According to the invention, the aim is achieved in that an anchor setting key is arranged at the same distance from the axis, which is movable over the slide along the carriage and is located in an anchor setting key holder which carries the anchor key with resilient receptacles and via an engagement and disengagement cylinder in the longitudinal direction of the carriage is movable.

With such a construction, it is possible for the boreholes to be made and the anchors inserted with a single motor and, above all, for the anchor setting keys to be inserted in the subsequent operation. Thereby. that the various brackets or tools are each rotatable about a common axis in front of the unit, a particularly simple change of tools is possible, while at the same time taking up little space for the entire device. Since, as a rule, the boring bar must be longer than the anchor, it is advantageous to first insert the anchor setting key into the motor and only then to insert the rock anchor into the anchor setting key. Such a procedure is made possible by the mobility of the anchor setting key holder in the longitudinal direction of the carriage.

If the anchor setting key holder is arranged between the boring bar guide and the anchor magazine holder, viewed in the pivoting direction around the axis, a particularly rapid working process can be made possible with particularly simple control, since the rotation about the axis only has to take place in one direction for the working process.

If the insertion tube and the anchor setting key have the same angular position on the axis, the anchor setting key can be inserted into the motor in one position and the adhesive, in particular the two-component adhesive system, can be introduced into the borehole at the same time. If an armature gripper that can be engaged and disengaged is provided for receiving an armature from the armature magazine moved in front of the drill motor, an armature can be removed from the armature magazine in this position, wherein the armature gripper can be disengaged again during the insertion of the armature into the borehole, so that the armature with the washer and the nut can already be arranged in the magazine, whereby any further manipulation, eg manual application of the plate and nut or an additional automatic workflow is not required.

A structurally particularly simple solution is obtained if the holder for the armature magazine, the armature setting key holder and at least one boring bar guide are arranged in a rotationally fixed manner on the common axis.

In order to enable guidance of the boring bar also between the front boring bar guide, which is rigidly fastened on the axis of rotation, and the drilling unit located in the initial position, at least one further boring bar guide can be pivotably arranged on the axle.

The rotation of the holder for the armature magazine, the armature setting key holder and the boring bar guide about the common axis is carried out by a motor, in particular a rotating cylinder. Such a structural arrangement ensures particularly trouble-free operation, while at the same time keeping the space requirement low.

In order to enable the adhesive to be introduced particularly easily into the borehole, the insertion tube for the adhesive can be movable in the longitudinal direction of the carriage.

A particularly compact design results when the axis of rotation is mounted on or in the end plates of the mount.

The anchor gripper can be brought particularly close to the borehole if the borehole is arranged on an end plate, which optionally carries a support mandrel.

If a feed motor for the carriage is arranged in relation to the carriage in a setting of the carriage with respect to the carriage, the construction is particularly simple.

If the carriage which carries the drill motor can be partially moved over the end of the carriage facing away from the borehole, the carriage can be kept shorter, and the carriage can be moved beyond the carriage end to insert the drill rod into the motor.

The invention is explained in more detail below with reference to the drawings.

1 shows an anchor drilling and setting device in an oblique view, and FIGS. 2 and 3 show the various working positions of the device according to FIG. 1 in a side and top view.

The anchor drilling and setting shown in Fig. 1 device has a carriage 1, which has end plates 2 and 3 at both ends. A carriage 4 on which a rotary impact motor 5 is arranged can be moved along the carriage 1. The carriage 4 is moved by the feed motor 8 via a chain 6, which is tensioned by a chain tensioner 7. A cover 9 is provided over the feed motor. The carriage is connected to a drilling carriage, for example via a drilling arm or the like, via a carriage holder (not shown). Provision can also be made to arrange the carriage, for example on a cutting machine.

In the end plates 2 and 3, an axis 10 is mounted parallel to the carriage, which can be rotated via a rotary cylinder 11. The axis. 10 also carries boring bar guides 12, 13, 14, the boring bar guide 12 being rigidly attached to the axis, whereas the boring bar guides 13, 14 can be rotated out of their working position via their own cylinders 15, 16, so that the drilling unit 5 does not move as it moves along the mount is hindered and on the other hand the guidance of the boring bar 17 with the drill bit 18 is fully guaranteed. The anchor setting key holder 19, which carries the anchor setting key 20 via spring clips 21, is also fixed on the axis 10. The anchor setting key holder is moved over the engagement and disengagement cylinder 22. A bracket 23 for the armature magazine 24 is also provided on the axis. The armature magazine has receiving disks 25, 26 which are rotatably mounted in the holder and can be rotated by a rotating cylinder 27. The individual anchors 28 already have plates 29 in the magazine, which are held in position by nuts (not shown). A holder 30 for the insertion tube 31 for the adhesive is fastened on the axis. This holder together with the insertion tube 31 can be moved in the longitudinal direction of the carriage via a cylinder 32. An anchor gripper 33 is also mounted in the end plate. The end plate also carries a support mandrel 34, which can be extended if necessary.

The operation of the device is now as follows. In the position 1 shown in FIG. 2, the support mandrel 34 is supported against the ridge 35. The carriage 1 is in this case in the vertical direction. By the rotary motor 11, the boring bar, which is located in the boring bar guide 12, 13, 14, is brought in front of the rotary impact motor 5, which at this time has moved beyond the carriage end, after which the motor is moved again to the ridge, so that the boring bar in the motor chuck comes into engagement. The receptacles in the boring bar guides 13, 14 are at an identical distance r from the axis 10, which ensures the parallel alignment of the boring bar. When making the borehole, the procedure is now such that first the boring bar guide 14, which carries the boring bar via a spring clip, with which the boring bar is held in the rest position, disengages. After that, the drilling is continued until the carriage reaches the boring bar guide 13, which is also swung out, after which the borehole can be completed, and the motor together with the drill pipe is moved again along the mount. Then the boring bar guides 13, 14 are brought back into engagement with the boring bar 17, the slide together with the motor is moved beyond the carriage, so that the drill pipe is removed from the drill chuck, whereupon the boring bar is pivoted out of the working position by rotation of the axis 10, whereby at the same time the anchor setting key holder 19 with the anchor setting key 20 and the holder 30 together with the insertion tube 31 for the adhesive are brought into the working position. This position is shown in FIG. 2. The respective angular position can be clearly seen from the positions with the indices a. The position la can be seen particularly clearly that the receptacle for the boring bar 17, the anchor setting key 20 and an anchor 28 have the same distance r from the axis 10.

In position 3 the anchor setting key is inserted in the rotary impact motor 5. Furthermore, the insertion tube 31 has been moved to the borehole mouth 36.

In the working position shown in FIG. 4 (FIG. 3), the armature magazine 24 is rotated in front of the rotary impact motor in such a way that the armature gripper 33 can engage an armature 28 of the anchor magazine, whereupon the rotary impact motor is moved in the longitudinal direction of the carriage and the anchor - as shown in position 5 - engages in the anchor setting key. The magazine is then pivoted out, an anchor being removed from the anchor magazine at the same time. The anchor is then rotated into the borehole by the rotary impact device in the opposite direction to the tightening direction of the screws, whereby the two-component adhesive that has been introduced into the borehole is mixed, then the mixture is briefly waited until the two-component adhesive has solidified and the nut is rotated in the opposite direction, whereby it is possible to tighten them. Since the armature gripper 33 is pivoted out, as shown in FIG. 5a, the pivoting movement being carried out via its own cylinder 27, the armature can already be provided with the armature plate and nut in the magazine.

The slide with rotary impact motor is then moved back into its end position, whereupon the anchor setting key with the anchor setting key holder 19 which has been brought into the working position is removed from the unit. The entire workflow then begins again, the work tools not being rotated in their entirety about the axis 10, but rather a pivoting movement of a maximum of 220 ° follows.

Claims (12)

1. Drilling and bolting apparatus for mining, tunnel construction or the like, adapted for connection by means of a mount (1), a mount holder, a drilling arm to a car, a mining machine or the like, comprising a drilling motor, particularly a rotary percussive motor (5), which is arranged slidably along the mount (1) on a slide (4), a movable drill rod guide (12, 13, 14), a pivotable rock bolt store (24), a rock bolt grip (23) for setting the rock bolts (28), a feed pipe (31) for a bonding agent, e.g. an adhesive compound, the rock bolt store (24), the drill rod guide (12, 13, 14) and the support (30) for the feed pipe (31) being arranged rotatably about a common shaft (10) and the distance from the shaft (10) being the same in any position of the drilling or rotary percussive motor (5), resp., characterised in that a rock bolt setting spanner (20) is arranged at the same distance from the shaft (10), which by means of the slide (4) is movable along the mount (1) and lies on a rock bolt setting spanner holder (19) which bears the rock bolt setting spanner (20) by means of resilient retainers (21) and which is movable in longitudinal direction of the mount by means of an engaging and disengaging cylinder (22).

2. Drilling and bolting apparatus as claimed in claim 1, characterised in that, seen in pivoting direction around the shaft (10), the rock bolt setting spanner holder (19) is arranged between the drill rod guide (12, 13, 14) and the rock bolt store grip (23).

3. Drilling and bolting apparatus as claimed in claim 1 or 2, characterised in that the feed pipe (31) and the rock bolt setting spanner (20) exhibit the same angular position on the shaft (10).

4. Drilling and bolting apparatus as claimed in any one of claims 1 to 3, characterised in that an engageable and disengageable rock bolt gripper (33) is provided to pick up a rock bolt (28) out of the rock bolt store (24) moved in front of the drilling motor (5).

5. Drilling and bolting apparatus as claimed in any one of claims 1 to 4, characterised in that the grip (23) for the rock bolt store (24), the rock bolt setting spanner holder (19) and at least one drill rod guide (12) are secured against rotation on the common shaft (10).

6. Drilling and bolting apparatus as claimed in any one of claims 1 to 5, characterised in that at least one further drill rod guide (13, 14) is rotatably connected on the shaft (10).

7. Drilling and bolting apparatus as claimed in any one of claims 1 to 6, characterised in that the rotary movement of the grip (23) for the rock bolt store (24), of the rock bolt setting spanner holder (19) and of the drill rod guide (12,13,14) about the common shaft is effected by a motor (11), particularly a rotary cylinder.

8. Drilling and bolting apparatus as claimed in any one of claims 1 to 7, characterised in that the feed pipe (31) for the bonding agent is movable in the longitudinal direction of the mount.

9. Drilling and bolting apparatus as claimed in any one of claims 1 to 8, characterised in that the shaft (10) is mounted on the face plates (2, 3) of the mount (1).

10. Drilling and bolting apparatus as claimed in any one of claims 1 to 9, characterised in that a face plate (2) carries the rock bolt gripper (33) and optionally a bracing mandrel (34).

11. Drilling and bolting apparatus as claimed in any one of claims 1 to 10, characterised in that a moving motor (8) for the slide is arranged opposite the drilling motor (5) in one adjustment of the slide (4) with respect to the mount (1).

12. Drilling and bolting apparatus as claimed in any one of claims 1 to 11, characterised in that the slide (4) which carries the drilling motor (5) is capable of being partly moved beyond the end of the mount remote from the bore hole.

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