EP2850284A1 - System for drilling and for placing rock bolts - Google Patents
System for drilling and for placing rock boltsInfo
- Publication number
- EP2850284A1 EP2850284A1 EP12712577.1A EP12712577A EP2850284A1 EP 2850284 A1 EP2850284 A1 EP 2850284A1 EP 12712577 A EP12712577 A EP 12712577A EP 2850284 A1 EP2850284 A1 EP 2850284A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rock
- drilling
- receiving opening
- flushing head
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011435 rock Substances 0.000 title claims abstract description 93
- 238000005553 drilling Methods 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000011010 flushing procedure Methods 0.000 claims abstract description 39
- 239000000853 adhesive Substances 0.000 claims abstract description 23
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 238000005065 mining Methods 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Definitions
- the invention relates to a device for drilling rock bolt holes and for setting rock anchors, especially for mining and tunneling, with a rock drilling machine, which is movable on a carriage in the direction of the mountains, for boring a boring bar in the mountains and for subsequent introduction a rock anchor used in the well produced and has a flushing head with a water passage and a tool holder.
- a borehole is first introduced into the mountains with a rock drill rod with water flushing.
- adhesive cartridges are introduced into the well, which are provided with an easily destructible sheath.
- a rock bolt is inserted into the borehole without using flushing water.
- the rock anchor must be twisted using the rock drilling machine to intimately mix the adhesive emerging from the destroyed adhesive cartridges.
- the adhesive fills the annulus between the borehole wall and rock anchor and cures there to fix the rock anchor in the borehole.
- this drill anchor contains flushing water channels and an integrated drill bit.
- this self-adhesive drilling anchor contains an adhesive depot, which is activated for bonding the drilling anchor in the mountains with high-pressure water, which is supplied via located in the drilling anchor separate high-pressure water channels.
- the supply of rinse water during the drilling process and the supply of high pressure water to activate the glue depot inevitably takes place in separate ways through separate facilities.
- the described drilling anchors have the technical advantage that the operations of drilling and Anker mecanic be temporally merged with each other.
- the benefits in the workflow come at the price of a number of disadvantages.
- a major disadvantage is that such self-adhesive drilling anchors are due to their complicated structure and function only suitable for rotary drilling in relatively soft rock. In contrast, they are completely unsuitable for hard rock drilling, especially when working with high performance impact drills.
- the invention proposes starting from the device of the type mentioned,
- rock anchor is provided with an adhesive depot, which can be activated by high pressure water which can be pressed into the rock anchor,
- the device according to the invention does not require an additional anchor setting device and its guide and requires no changeover when changing from working drilling to working operation anchoring.
- the change is done by simply removing the drill rod from the tool receiving opening of the flushing head and by inserting the rock anchor in this tool receiving opening. After setting the rock anchor, the boring bar can be re-inserted into the then empty tool receiving opening of the flushing head to start the next drilling operation.
- a preferred embodiment of the invention provides that the tool receiving opening of the flushing head is arranged at the front end of a spigot which transmits the rotational movement of the rock drilling machine to the boring bars or anchors and is surrounded by an annular chamber located in a stationary surrounding the spigot end casing is, which is sealed against the spigot, wherein the annular chamber via flow channels in the spigot with in the tool receiving opening is in communication and alternatively via check valves with rinse water or high pressure water can be acted upon.
- This embodiment of the water feedthrough results in a particularly simple construction, which uses the same passages for the supply of rinse water on the one hand and high pressure water on the other hand, without disturbing the different pressures. If flushing water is applied to the annular chamber, the non-return valve located in the high-pressure water supply line prevents flushing water from flowing into the high-pressure supply system. In contrast, when the annular chamber is subjected to high-pressure water, the non-return valve located in the supply line for flushing water prevents the outflow of high-pressure water into the flushing water supply system.
- the tool receiving opening of the flushing head and the end portions of the boring bars received by the latter are expediently provided with mating round threads or trapezoidal threads.
- Such threads are particularly robust, can be easily operated and can transmit extremely large axial forces.
- the outer diameter of the end portions of the rock bolts received by the tool receiving opening is smaller than the inner diameter of the threads on the inner circumference of the tool receiving opening. This has the consequence that the end portion of the rock anchors can be pressed axially in the armature insertion of the irrigation arm when anchor setting, in order to achieve a high-pressure-tight seal there.
- each rock anchor coupling element In order to transmit the required for the rotation of the rock bolt torque of the rock drilling machine on the rock anchor, the tool receiving opening of the flushing head and the end of each rock anchor coupling elements are assigned, the form-fitting and / or non-positively transmitted torque from the insertion of the rock anchor.
- the last-mentioned coupling elements are expediently designed as teeth protruding radially outward beyond the insertion end at the front end of the insertion end, which engage in matching engagement openings at the end of the rock bolt.
- the teeth can be provided on the rock anchor and the matching engagement openings at the insertion.
- Fig. 1 A device according to the invention schematically in side view with inserted boring bar;
- Fig. 2 a device according to the invention schematically in side view with inlaid rock anchor;
- Fig. 3 the flushing head in side view
- FIG. 5 shows a side view of the flushing head with inserted boring bar
- Fig. 6 a side view of the end portion of a rock anchor.
- the rock drilling machine designed as a rotary hammer drill is designated by reference numeral 1.
- the rock drilling machine 1 is mounted on a carriage 2, which is displaceable on a carriage 3 in the longitudinal direction.
- the rock drilling machine 1 has a flushing head 4, which is provided with a tool receiving opening 5, in the alternative, the end portion a drill rod 6 (see Figure 1) or the end portion of a rock bolt 7 (see Figure 2) can be used.
- the drill rod 6 has a drill bit 8 for rotationally driven drilling and is provided with a flushing water channel 9, can be introduced through the rinse water in the wellbore, which emerges at outlet openings 10 to rinse the cut from the drill bit 8 cuttings out of the borehole out.
- the rock bolt 7 is designed as a self-adhesive rock anchor and contains an adhesive depot 11, the adhesive of which can be pressed out with a squeezing device 12 via outlet openings 13 from the rock bolt to fill the annular space between the rock bolt 7 and the borehole wall with the fast setting adhesive.
- the squeezing device 12 is actuated by high-pressure water, which is supplied via the hollow rock bolt 7.
- the flushing head 4 has a spigot 14, the rear with a connecting element 15 for connection to the transmission of the rock drilling machine 1 and front with the tool receiving opening 5 for the boring bar 6 and Rock anchor 7 is provided.
- the tool receiving opening 5 has inside a round thread or a trapezoidal thread 16, in which corresponding thread at the end portion of the drill rods 6 can be screwed.
- the tool receiving opening 5 is provided with seals, not shown, which act in the axial and / or radial direction and produce a pressure-tight connection between the flushing head 4 and the end portion of the drill rod 6 and the rock bolt 7.
- the end portions of the rock anchors may be provided with seals which seal axially or radially.
- the end sections of the Rock anchors have an outer diameter that is slightly smaller than the inner diameter of the threads on the inner circumference of the tool receiving opening 5, so that the end portions of the rock anchors 7 can be axially inserted into the tool receiving opening 5 to produce there by axial contact pressure a high-pressure seal.
- the insertion end 14 is formed centrally cylindrical. This cylindrical region is surrounded by a housing 17, which is arranged rotationally fixed and is sealed pressure-tight against the outer surface of the insertion end 14. Inside the housing 17 there is an annular space 18 surrounding the insertion end 14, which can be connected via a low pressure connection 19 to a flushing water supply (not shown) and via a high pressure connection 20 to a high pressure water supply (also not shown).
- the low pressure port 19 and the high pressure port 20 are each provided with check valves 21 and 22 which prevent low pressure water from entering the low pressure port 19 into the high pressure port 20 or high pressure water.
- the insertion end 14 is provided in the region of the annular space 18 with a transverse bore 23 which opens into an axial blind bore 24 of the insertion end 14.
- the blind bore 24 communicates with the tool receiving opening 5 and via this with the flushing channel 9 in the boring bar 6 or with the cavity in the rock bolt 7 in connection.
- radially projecting teeth 25 are provided on the outer circumference of the insertion end 14 (see Figure 6) into corresponding mating engagement openings 26 at the end portion of the rock bolts 7 intervene to be able to transmit a high torque to the anchor rod 7 by positive engagement. If necessary, this torque transmission can also take place by means of suitably designed non-positive coupling elements. Alternatively, of course, the teeth at the insertion end 14 and the mating engaging holes are provided on the end portion of the rock bolt 7.
- a boring bar 6 is inserted into the tool receiving opening 5 of the flushing head 4.
- the flushing water channel 9 of the boring bar 6 is supplied with rinsing water from the rinsing water supply (not shown) via the low-pressure connection 19, the check valve 21, the annular space 18, the bores 23 and 24 and via the tool receiving opening 5.
- the check valve 22 prevents rinse water from entering the region of the high-pressure water supply.
- the boring bar 6 is replaced by a rock anchor 7.
- the rock anchor 7 is inserted by means of the rock drilling machine 1 in the previously prepared wellbore and possibly rotated.
- the squeezing device 12 is in the rock anchor 7 from the high-pressure water supply, not shown through the high-pressure port 20, the check valve 22, the annular space 18, the bores 23 and 24 and applied via the tool receiving opening 5 with high pressure water so that the adhesive supply of the adhesive depot 11 is pressed via the outlet openings 13 into the annular space between the rock bolt 7 and the borehole wall in order to harden there.
- rock drilling machine 1 is moved back to the starting position and the next drilling operation can begin.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2012/000926 WO2013127408A1 (en) | 2012-03-02 | 2012-03-02 | System for drilling and for placing rock bolts |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2850284A1 true EP2850284A1 (en) | 2015-03-25 |
Family
ID=45932277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12712577.1A Withdrawn EP2850284A1 (en) | 2012-03-02 | 2012-03-02 | System for drilling and for placing rock bolts |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2850284A1 (en) |
WO (1) | WO2013127408A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106761410B (en) * | 2016-12-16 | 2019-07-12 | 河南宇建科技股份有限公司 | A kind of binary channels brill develops integrated device |
CN108086905B (en) * | 2018-01-26 | 2024-02-06 | 襄阳亚舟重型工程机械有限公司 | Combined drilling boom for drilling holes, installing anchor rods and rock drilling vehicle with the same |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005000142A1 (en) * | 2005-10-19 | 2007-04-26 | Hilti Ag | squeezing |
DE102005000158A1 (en) | 2005-11-16 | 2007-05-24 | Hilti Ag | Boring and anchor setting equipment for mountain, tunnel or underground engineering comprises squeezing out device, which is integrated into chamber provided in housing of boring and anchor setting equipment |
DE102007008966A1 (en) * | 2006-02-24 | 2007-09-06 | Friedr. Ischebeck Gmbh | Injection head for injection drilling anchors, has sink head, inclusive of outer part having two different supply connections, and inner part with rear connection for drilling drive and front connection for anchoring ring |
DE102007038265B3 (en) | 2007-08-13 | 2009-02-05 | Gta Maschinensysteme Gmbh | Apparatus for setting rock anchor, has drilling unit and anchor setting unit, which is adjustable arranged and formed between stand-by position and working position in each case |
DE102008024365A1 (en) | 2008-05-20 | 2009-11-26 | Gta Maschinensysteme Gmbh | Automated drilling and tying device with separate carriages |
DE102008002303A1 (en) * | 2008-06-09 | 2009-12-10 | Hilti Aktiengesellschaft | Adapter device for setting a self-drilling, chemically anchored fastener |
DE102011005855A1 (en) * | 2011-03-21 | 2012-09-27 | Hilti Aktiengesellschaft | rock bolt |
-
2012
- 2012-03-02 WO PCT/EP2012/000926 patent/WO2013127408A1/en unknown
- 2012-03-02 EP EP12712577.1A patent/EP2850284A1/en not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2013127408A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013127408A1 (en) | 2013-09-06 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Effective date: 20150209 |
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Extension state: BA ME |
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DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: E21D 20/00 20060101ALI20170201BHEP Ipc: E21B 21/10 20060101AFI20170201BHEP Ipc: E21D 20/02 20060101ALI20170201BHEP |
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INTG | Intention to grant announced |
Effective date: 20170222 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20170705 |