DE3005484A1 - STONE BOLT ASSEMBLY - Google Patents

Description

Phy &. Dr. rer. nat. Woltgar.g Kempe q η η c L ο /

PATCNTAMW ^ I.T

P.O. Box 1273 O e, IO

D-68OO Mannheim 1

Telephone CO621) 381-4744

February 13, 1980 Be 2

Linden-Alimak AB 931 03 Skellefteä (Sweden)

Rock bolt assembly equipment

The invention relates to a device for fastening of bolts in rock with a rock drill., a. "Resin injection device for injecting resin into one of the drill. Hole, as well as a bolt insertion device for the introduction of an anchor bolt into the = borehole, the bolt after hardening of the resin in the borehole is held in the borehole. In particular, the invention relates the resin injector.

Resin cartridges have so far been used for this injection process, which have two chambers, one for containing resin and the other for containing a curing agent

in the.

Prlvatanachrlft: 894O Weinheim · Holbelnstrasse 8 - Telephone CO 62 OD 7 3212

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The bolt is inserted into this borehole, whereby the. The cartridge is blown open and the resin and the hardening agent escape from this and by turning the bolt itself can mix with each other.

The - extensive mechanization of the work processes - the drilling, the. Introduction of the aforementioned cartridges and the. Bolt has become possible with a relatively fast operating rock bolt-mounting devices, such as those used in the mine-tunnel support and in French patents 1,362,691 and 77 .10169 are described.

The: However, the use of cartridges has the disadvantage that the a special production requiring manufacture of these cartridges is only possible at relatively high costs. The .. · Mechanization and automation of those to be performed with such a device Work steps are meanwhile. Limits are set by the cartridges required for handling and transporting the cartridges Locomotor organs.

The. aforementioned, known devices also have the Difficulty centering the resin feeder and bolts on a working axis that coincides with the axis of the Borehole matches. The cause of this difficulty is that. relatively large tolerances in the movements of the various Parts of the device that have to be accepted in order to reduce the costs of the device due to unrealistically tight manufacturing tolerances not to increase.

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The invention is based on the object of a resin injection device for a rock bolt jig which reduces the cost of resin compared to a. · Resin cartridges using device can be lowered.

Another task of the. Invention consists in this resin injection device for the fully automated implementation of one; Rock bolt assembly device for assembling a series of anchor bolts in the rock to be carried out one after the other.

Another object of the invention is to provide guide organs, by means of which the resin feed device is precisely guided along a working line determined by the drilling axis of the borehole can be.

Invention according to. the resin injection device has two pipes for the separate but simultaneous injection of a resin and a curing agent into the borehole, with the pipelines over, each with a pump with a resin tank and a hardener container are connected.

An exemplary embodiment of the subject matter of the invention is described in more detail below with reference to the accompanying drawing. Show it:
Prop. 1 is a schematic side view of a vehicle with a rock bolt mounting device mounted thereon;

! ig. 2, 5 and 4- partial, schematic views from the side, from above and from the face of a bolt drilling unit,

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Fig. 5 is a side view of the resin injection apparatus showing is built into the device according to FIGS. 2-4,. ■

6 shows the connection diagram of the resin injection device Fig. 5 and

Fig. 7 shows the resin pump, for the resin injection device in a partial sectional side view.

That. The composite vehicle according to FIG. 1 has a. Tractor 2 with Trailer 4- on which a vertical structure 6 with a hydraulic boom 8 is attached. At the end of the boom a rock bolt mounting device 10 is attached. The device IO can be moved laterally and vertically by the boom 8 will. The bolt device IO can also be around the longitudinal axis of the boom 8 can be rotated.

The bolt device is held by a longitudinal frame 12, which in turn is rotatable about a transverse shaft 14 of the boom 8 is held. This rotary movement is caused by a hydraulic cylinder 16, which is between the frame 12 and a Drive head 18 of the boom 8 is effective. The drive head 18 has a drive motor for the rotary movement of the boom 8 about its longitudinal axis, which is fastened by means of a flange 20 at the end of the hydraulic boom.

The frame 12 has two shaft bearings 22, between which a shaft journal, not shown, is arranged. On this shaft journal a cylinder shaft 24 is rotatably mounted. On the shaft 24 is a mounting plate 26 by means. Flanges 28 attached. On both sides of the shaft 24, the plate 26 is with

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a bolt connection piece 30 provided with the end of a Piston rod 32 is connected, the piston rod 32 to two oppositely working, arranged one behind the other Cylinders 34 ·, 36 leads. A piston rod 38 of the cylinder "36 is attached at its end to the lower end of a bracket 40, which in turn is attached to the frame 12.

By means of the cylinder 34-> 36 on both sides of the frame 12 can. Wave 24 about hers. Axis rotated v / earth, whereby the Mounting plate 26 can be pivoted laterally.

On the plate 26 are feed rails 42 and 44 for the. The drilling device 46 and the bolt screwing device 48 are fastened lying parallel to the shaft 24. Between the drilling device and the bolt screwing device 42, 46 and 44, 48 has a resin feed and injection device 50 arranged therein is provided with injection openings 52.

The mode of operation of the device described is as follows: By means of the drilling device 46, a hole is first made in the wall of a shaft or the like. drilled its surrounding rock should be attached. By means of the device 50 this is a The borehole is filled with a fast-setting resin, followed by a hose a safety bolt is screwed into the resin-filled hole with the device 48. At the front end of the frame 12 a centering device is arranged, by means of which, all three of the aforementioned operations on one. Working axis 54 can be aligned. The coarse adjustment on this axis, of the boring bar, of the resin feeder and

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of the bolt is effected by pivoting the sideways Retaining plate. 26 using the. two cylinder pairs 34, 36. The Drill 26, the bolt inserter 48 and the resin feeder 50 are shown by means of a void each Drive chain on their respective guide rails forwards and with the aid of the centering device on the working axis 54 movable along, in a manner related to Ge. Stone drilling machines is already known.

The centering device consists of a device attached to the frame 12 Bookman which a stop 56, e.g. made of hard rubber, and one. Centering sleeve 57 are attached. The axis of the centering> rifle 57 and the labor eight. 54 are aligned with each other, with the centering sleeve 57 is axially slotted in a plane on which essentially the axis 5 ^ and the longitudinal axis of the Frame 12 lie.

The centering bushing has an axial face on one of its faces slotted, funnel-shaped extension 57 ', both of which Halves are each attached to the corresponding sleeve area. At the other end there is also the centering bush with one axially slotted protective funnel 58, both of which Halves are also connected to the corresponding sleeve area. The. Halves of the. Centering sleeve 57 with the funnel-shaped Areas 58 and 57 ″ are pivotably attached to the frame 55 and pivotable away from one another by a hydraulic cylinder 59.

The aforementioned work steps for fastening a bolt into the rock wall are carried out after the device is in position

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is brought, the stop 56 in firm contact with the wall is brought in such a way that the working axis 54 on the Aahse of the hole to be drilled is aligned. The centering sleeve 57 with its funnel-shaped ends 57 'and 58 is normally closed and serves with its rearwardly directed guide funnel 57- the drill rod, the resin feeder and to guide the bolts when the corresponding work steps start. The feed hopper 57 'is large enough to meet the additional rough tolerances of the device, by pivoting the three aforementioned units around the. Shaft axis 24 in their only roughly aligned

develop,
Work positions / to compensate.

Sometimes it may be necessary to use bolts that have an anchor plate at their outer end in order to secure the To fix the rock wall in the traditional way. In such cases, the bolt with the one on its rear End, attached anchor plate through the centering sleeve 57 Introduced into the borehole, the passage of the anchor plate through the centering sleeve being made possible in that the two sleeve halves of the hydraulic cylinder.- 59 unfolded will.

The interior of the protective funnel 58 is during operation connected to a suction line for the purpose of suctioning off the drilled out Materials.

With the feed rail 44-, there is also a on the same side Bolt magazine 60 arranged.

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In Swedish patent application 7901617-6, filed on February 22nd, 1979, the bolt magazine and its function are described in more detail.

The resin injection device 50 has a feed rail 62 on, inter alia by means of a retaining plate 64 with the guide rails 42 and 44 · is connected. In the vicinity of the plate 64 is the housing 66 of a hydraulic rotary motor on the Rail 62 attached. The hydraulic motor drives a sprocket

72

68 and this one over another sprocket / running drive chain 70 on which a carriage running in the rail 62 74 is attached.

One end of a double tube is attached to the slide 74, which is substantially the same length as the guide rail 62. This double tube consists of an outer tube 76, in which an inner tube 78 is arranged coaxially. To the on Slide 74 attached end, the tubes 76, 78 face up curved areas with connecting elements 80, 82, to which flexible supply lines 84, 86 can be connected. At the outlet end of the double tube, the inner tube 78 protrudes a short one Piece out of the outer tube 76 and is held by struts 88 coaxially to the outer tube. The outer tube 76 is in a cylindrical shape Housing 90 out, which is attached to the rail 62. In the housing 90 there are electrical heating coils over the entire length arranged.

From a piston pump 9 ^ is "from a container 92 via a

Line 84 promoted resin into line 76. The line 78 gets an out

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a container 9 ° from a screw pump 97 through a conduit 86 promoted hardener for the resin. The hardener and the resins are made in such a way that they harden quickly after they have been mixed. The resin is, for example, a low viscosity, thixotropic polyester, which hardens quickly due to the hardening agent.

The pump 94 is driven by a hydraulic motor 98 and the Pump 97 driven by a hydraulic motor 99, i'igur shows a hydraulic diagram for the two hydraulic motors. In Fig. 1, the arrangements of the container 92 and the pump are shown on the trailer 4.

The pump 94 is connected to an inlet line 100, from the bottom of the container 92 via a spring-loaded, against the inlet direction closing valve 104 leads into the chamber of a cylinder 103.

A hydraulic cylinder 106 is fastened coaxially to the end of the cylinder 103. The cylinder 106 points at its end Inlets 108, 110 for the hydraulic fluid and inlet connections 112, 114 for this. The cylinders 103, 106 each have a piston 116, 118, which by a common Piston rod 120 are connected to one another, the piston rod being passed through a sealing ring 122. the end the free end of the cylinder 106 protrudes an axially adjustable rod 124 guided through a seal, which by means of an adjusting nut 128 and a lock nut 130 relative to the Cylinder 106 is adjustable.

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At the inlet end of the cylinder 103 is a radially arranged one Outlet nozzle 132, in which a spring-loaded valve that closes against the outlet direction. 134 arranged is.

When a borehole is to be filled with resin in the operating state, the double pipe 76, 78 brought by the centering pass to the front and to the end of the borehole is: whereupon the Eumpen be set ⁱⁿ function of this introduced 94,97, while simultaneously and successively the double pipe 76, 78 is withdrawn from the borehole. In the operating state of the pump 94, the piston 116 is moved to the right by means of the piston 118 of the hydraulic motor 98 in FIG. 7 moves, wherein eiiB suction occurs, which lifts the valve 104 from its seat and presses the valve 134 against its seat. As a result, a batch of resin is conveyed from the container 92 through the inlet valve into the cylinder chamber 102. The delivery quantity is determined by the length of the stroke of the hydraulic piston 118, the stroke in turn being determined by the two nuts 128, 130 of the adjusting rod 126, which serve as stops. The charge of uncured resin sucked into the cylinder 102 is ejected in that the piston 116 is moved to the left in FIG. 7 by means of the hydraulic motor 98, whereby the

pressed
Valve 104 against its seat / and valve 134 from its seat

is lifted.

The movement of the hydraulic motors 98, 99 of the two pumps 94, 98 is synchronized, so that the resin and the curing agent emerges from the double pipe at the same time. Also takes place with

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and in this synchronization also the drive of the carriage. The tubes 76, 78 are continuously filled with the resin and the hardening agent applied, even between the individual

of the enveloping materials injection processes, with a preheating / of the in the cylinder located heating coil takes place before the next injection process begins, namely while a bolt is inserted into a drill hole already filled with resin and hardener, and another Hole is drilled. If necessary, it is therefore possible to reduce the hardening time of part of the resin filling the borehole, namely to reduce the resin at the bottom of the borehole, with the consequence that the bolt immediately after its Introduction to the borehole stuck. During the introduction of the bolt, it is turned at the same time, so that it is there. ^: Resin and hardener can mix together. Possibly the bolt can also be used for a short time afterwards Time can be turned, whereby this time must then be controlled by a tent relay.

The hydraulic circuits of the three hydraulic motors 66, 98, 99 for the resin injection device, as mentioned above, If necessary, they can be combined in such a way that their operations are synchronized and / or coordinated with one another. Even these three hydraulic circuits can in turn be included in a larger hydraulic system that includes all hydraulic circuits the rock bolt assembly device, thereby coordinating and / or synchronizing the operations of the Drilling machine, the resin injection device and the bolt inserting device can be manufactured. This, 'in turn are controlled with contactless, inductive sensors, for example, which - attached to the various moving parts -

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operate the valves of the hydraulic system. With the aid of a work program, complete automation of the successive introduction of the bolts located in the magazine 60 (six in the example shown) can be achieved, also taking into account the aforementioned Swedish patent application. With such an automated mode of operation, the operating personnel can be protected remotely from the work site
/ Remain in the vehicle cabin of vehicle 2.

The realization of the hydraulic control system briefly mentioned above with position sensors and work program can be done by a person skilled in the art.

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Claims (1)

Patent claims: 1. Device for fastening bolts in rock, with a rock drill, a resin injection device for Injection of resin into a hole drilled by the drill and a bolt inserter for insertion an anchor bolt into the borehole, characterized in that the resin injection device has two pipes (76 »78) has for the separate but simultaneous injection a resin and a curing agent into the borehole, the pipelines each having a pump (9 ^ -, 89) are connected to a resin container (92) and a hardener container (96), respectively. 2. Apparatus according to claim 2, characterized in that the lines (76,78) on a feed rail (62) in can be moved forward in their longitudinal direction. 3. Device according to claim 1 or 2, characterized in that (90) that a heating device / is provided for preheating the tubes (76,78) and their contents prior to their injection into the borehole. . Device according to Claims 2 and 3, characterized in that that the heating device is attached to the front end of the feed rail, which acts as a guide tube (90) is formed and provided with a heating element. 030035 / 07S3 5. Device according to at least one of claims 1 to 4, characterized in that the line pipes (76,78) are arranged coaxially one inside the other, the inner tube (78) protrudes a short distance from the outer tube (76) with its front end, and that the inner tube on a Hardener container (96) and the space between the two tubes are connected to a resin container (92). 6. Device according to at least one of claims 1 to 5 » characterized in that the resin injection pump (9 * 0 a piston pump is with a piston (116) and a piston rod (100), the latter with a piston (118) running in a hydraulic cylinder (106) connected to drive the piston of the resin pump. 7. The device according to claim 2, characterized in that, the hydraulic motor (66) for moving the pipes (76,78) forward and the two hydraulic motors (98,99) for: the resin and hardener injection pumps (94.97) in a common hydraulic control circuit for coordination and synchronization of the operations of the three engines are. 8. Device near claim 7> characterized in that the hydraulic motors drive the rock drilling machine (46) and the bolt insertion device (60) are also included in the common hydraulic control circuit, wherein contactless sensors for determining the position of the moving parts of the device for the actuation of the $ 30035/0753 Valves and their regulation in the common hydraulic circuit are provided. 9. The apparatus of claim 1, wherein the rock drilling machine (46), the pipelines (76,78) and the Eolzen- (12) infeed devices are attached to a frame / close to a Work line along which the work steps take place should, a stop (56) is provided, which is in contact with the rock wall in which a borehole is to be made, can be brought, whereby the frame (12) is precisely adjusted in its position relative to the rock wall, thereby characterized in that a centering device (57-59) is provided for the precise guidance of the drill rod, the pipelines (76,78) and the bolt on a working line (5 ^ 0 serves, which centering device is fixedly set relative to the stop (56) at least at the beginning of the work steps is. 10. The device according to claim 9, characterized in that the centering device of guide funnels (57 »57 ') is formed on the frame (12) coaxially to the · common Working lines C54) are attached. 11. The device according to claim 10, characterized in that the funnel (57 »57 ') divided into two by a longitudinal slot The two halves of the funnel can be folded away from one another outwards. 03003B / 0753