SE543524C2 - Nozzle, system and method for securing a bolt in a rock hole - Google Patents
Nozzle, system and method for securing a bolt in a rock holeInfo
- Publication number
- SE543524C2 SE543524C2 SE1950866A SE1950866A SE543524C2 SE 543524 C2 SE543524 C2 SE 543524C2 SE 1950866 A SE1950866 A SE 1950866A SE 1950866 A SE1950866 A SE 1950866A SE 543524 C2 SE543524 C2 SE 543524C2
- Authority
- SE
- Sweden
- Prior art keywords
- nozzle
- channel
- bolt
- rock hole
- component
- Prior art date
Links
- 239000011435 rock Substances 0.000 title claims abstract description 176
- 238000000034 method Methods 0.000 title claims abstract description 62
- 239000000203 mixture Substances 0.000 claims abstract description 109
- 239000002981 blocking agent Substances 0.000 claims abstract description 97
- 238000002156 mixing Methods 0.000 claims abstract description 52
- 238000004804 winding Methods 0.000 claims description 20
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 description 19
- 230000008569 process Effects 0.000 description 15
- 101100194816 Caenorhabditis elegans rig-3 gene Proteins 0.000 description 11
- 239000011440 grout Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- JIABEENURMZTTI-UHFFFAOYSA-N 1-isocyanato-2-[(2-isocyanatophenyl)methyl]benzene Chemical compound O=C=NC1=CC=CC=C1CC1=CC=CC=C1N=C=O JIABEENURMZTTI-UHFFFAOYSA-N 0.000 description 1
- LKJPSUCKSLORMF-UHFFFAOYSA-N Monolinuron Chemical compound CON(C)C(=O)NC1=CC=C(Cl)C=C1 LKJPSUCKSLORMF-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000005641 tunneling 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
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- 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
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Coating Apparatus (AREA)
Abstract
Herein is described a nozzle (5) for injecting a multi-component mixture into a rock hole, wherein the mixture is adapted for securing a bolt in the rock hole. The nozzle (5) comprises a first channel (31) adapted to receive a first component (A) of the multi-component mixture, a second channel (33) adapted to receive a second component (B) of the multi-component mixture and a third channel (55) adapted to receive a blocking agent (S). The third channel (55) is connected to the first channel (31) such that the blocking agent (S) can be provided to the first channel (31) via the third channel (55). Furthermore, the nozzle (5) comprises a mixing member (23) adapted to mix the first (A) and the second (B) component prior to injecting the mixture of the first (A) and the second (B) component into the rock hole. The nozzle (5) further comprises an outlet (21) at a first end (22) of the nozzle (5) adapted to inject the mixture of the first (A) and the second (B) component directly into the rock hole.A system (1) for securing a bolt in a rock hole and a method for securing a bolt in a rock hole are also described.
Description
1 NOZZLE, SYSTEM AND l\/IETHOD FOR SECURING A BOLT IN A ROCK HOLE TECHNICAL FIELD The present invention relates to rock bolting, for example within the mining industry andwhen performing tunnel construction. The invention particularly concerns a nozzle, a system and a method for securing a bolt in a rock hole.
BACKGROUND ln conjunction with tunneling or in mining the rock may weaken which in turn maylead to parts of the rock collapsing. A collapsed rock will not only delay the work at the sitebut is also very hazardous for personnel working on the site. There is thus a need formeasures which reduces the risk of collapse. Such measures are usually called rockreinforcement. Wood pillars and wood beams were used for a long time but have givenway to better solutions. A common method for rock reinforcement today is to use bolts forfixating a rock arc that will carry the ceiling in the tunnel. The bolt may e.g. be fastened ina pre-drilled hole or may be drilled into the rock during the fastening procedure.
However, when the underground opening is large, bolts may not be long enoughto create the arc effect. lnstead cable bolts may be used. The cable bolts may e.g. besteel cables. These cables are fastened in the rock hole by a grouting agent, e.g. cement.The cables may also be fastened by mechanical anchor, e.g. an expanding shell in thetop of the cable for instant support. The cables fastened this way are thereafter grouted inorder to achieve rust protection by encapsulation. Traditionally the cable bolts wereplaced in pre-drilled holes and the hole was thereafter filled with grout. This is a methodwhich is still commonly used in mines, even though it carries a lot of risk since it is amanual operation requiring the presence of personnel close to parts of the rock that arenot secured.
During the last decades a mechanized operation has been developed. The hole isfirst drilled and thereafter filled with grout. The cable bolt is inserted into the hole as thefinal step. The mechanized method is not only faster compared to the previous method,but it is also much safer as the entire process is controlled from the cabin where theoperator is protected. Typically_._ all of the operations, such as e.g. drilling, mixing and pumping of grout, cable insertion etc., is performed by one machine and one operator. 2 Unfortunately, the mechanized method of cable bolting has some limitations anddrawbacks of its own. The grouted cable cannot carry loads until the grout is cured. Thegrout which is usually cement takes a few hours to cure, but full load carrying capability isonly achieved after approximately 48 hours. Thus, the method is good for secondarysupport, but not for primary support since the waiting time will delay the work.Furthermore, the grout need to be mixed by a mixing system, usually provided on the rig.One batch of grout will require around 15 minutes for mixing. Since many customersprefer to first drill all of the bolt holes in the tunnel and thereafter perform the bolting, thetime required to mix the grout will limit the productivity considerably. ln addition, the groutsystem requires a lot of cleaning in order to function satisfactorily. The rig often has-ve anautomatic cleaning program installed but the grout pump and mixer still needs manualcleaning to operate well. This cleaning may often require up to one hour per work-shift, thus reducing the overall productivity.
NO 319141_E;š_ B1 discloses a method of reinforcing a rock by rock bolting. The boltis secured in the rock hole by pumping a multi-component fast hardening resin into a rock hole. The components are mixed in a mixer 452» before entering the rock hole.
WO 2017380042 A1 discloses a method for rock reinforcement where a first anda second component are injected into a rock hole through a first and a second channel forsecuring a bolt in the rock hole. A blocking agent is thereafter injected into the second channeL ln view of the existing prior art there is thus a need to improve the methods,devices and systems used today when performing cable bolting in order to achieve a fast and reliable cable bolting procedure.
SUMMARY An object of the present invention is therefore to improve the reliability andefficiency of the operation when performing rock cable bolting. An object is furthermore toreduce the risks for personnel at the site during operation. Alternatively, the object is to achieve an alternative to known solutions within the technical field.
The object is achieved according to a first aspect of the invention by a nozzle for injecting a multi-component mixture into a rock hole, wherein the mixture is adapted for 3 securing a bolt in the rock hole. The nozzle comprising a first channel adapted to receivea first component of the multi-component mixture, a second channel adapted to receive asecond component of the multi-component mixture and a third channel adapted to receivea blocking agent. The third channel is connected to the first channel such that the blockingagent can be provided to the first channel via the third channel. Furthermore, the nozzlecomprises a mixing member adapted to mix the first and the second component prior toinjecting the mixture of the first and the second component into the rock hole. The nozzlefurther comprises an outlet at a first end of the nozzle adapted to inject the mixture of thefirst and the second component directly into the rock hole.
The bolt may e.g. be a cable bolt.
The nozzle may be adapted to be inserted into a rock hole and fill the hole fromthe bottom of the hole with the multi-component mixture. The nozzle may then be movedout of the hole as the hole is being filled with mixture thereby filling the hole from thebottom and out towards the hole entrance.
The third channel may be connected directly to the first channel.
By the nozzle comprising a first and a second channel adapted to receive arespective component and a mixing member adapted to mix the first and the secondcomponent prior to injecting the mixture into the rock hole it is ensured that thecomponents do not mix before the mixing member. Thereby the risk of blockage in thesystem is reduced. Furthermore, since the nozzle is adapted to inject the mixture directlyinto the rock hole the mixture will be mixed just before leaving the nozzle and beinginjected in the rock hole, e.g. into the bottom of the rock hole. Thereby there is no risk ofthe components curing before leaving the nozzle and entering the rock hole. At the sametime a proper mixing of the components yiggare ensured since the nozzle comprises amixing member arranged to mix the components. The components thereby need not mixinside the hole, i.e. within the hole outside of the nozzle, which may result in inadequatemixing of the components resulting in a decreased quality of the mixture that is intendedto secure the bolt in the rock. Furthermore, since the nozzle is adapted to inject themixture directly into the rock hole the mixture may be injected into the bottom of the hole,ensuring that the hole is filled properly and evenly. Furthermore, the operation of injectingthe mixture into the hole is much facilitated since the nozzle is adapted for direct injectioninto the rock hole, whereby no auxiliary equipment such as external mixers etc. areneeded. ln addition, since the nozzle comprises a third channel adapted to receive a blocking agent which is connected to the first channel such that the blocking agent can be 4 provided to the first channel via the third channel, a blocking agent may be provided to thefirst channel. The blocking agent may thereby extrude the first component from the firstchannel and replace the first component in the first channel with blocking agent. Theblocking agent will provide a barrier in the first channel. The first channel will then beblocked from coming into contact with e.g. moisture and/or the second component. Thefirst component is thereby held separate from moisture and/or the second component inthe first channel thanks to the blocking agent constituting the barrier. Thereby the firstchannel is protected from e.g. coatings in the channel which may be created When thefirst component cures upon contact with for example moisture and/or upon contact withthe second component. As a result thereof, the risk for a stop or blockage in the firstchannel is reduced. Thus, the risk for interruption during rock reinforcement operation isdecreased and as a consequence the reliability and the efficiency of the rock reinforcement process are improved.
Consequently, a nozzle for injecting a multi-component mixture into a rock hole is provided that achieves the above mentioned object.
According to some embodiments the third channel is connected to the secondchannel such that blocking agent can be provided to the second channel via the thirdchanneL The third channel may be connected directly to the second channel.
Since the blocking agent can be provided to the second channel via the thirdchannel the blocking agent may be provided to the second channel. The blocking agentmay thereby extrude the second component from the second channel and replace thesecond component in the second channel with blocking agent. The blocking agent willthereby provide a barrier in the second channel. The same advantageeus will then beachieved in the second channel as was achieved in the first channel above. Specifically,the second channel Will then be blocked from coming into contact with e.g. moistureand/or the first component. The second channel will then be protected from any coatingbuild up in the same way as the first channel. Additionally, by being able to introduceblocking agent into the second channel a redundancy is achieved whereby if the blockingagent for some reason does not reach the first channel, the second channel will still be blocked by the blocking agent preventing the first and second component from coming into contact with each other. This increases the reliability of the nozzle further, improving the reliability and efficiency of the process of bolting.
According to some embodiments the nozzle comprises a fourth channel adaptedto receive the blocking agent, wherein the fourth channel is connected to the secondchannel such that the blocking agent can be provided to the second channel via the fourthchanneL The fourth channel may be connected directly to the second channel.
By having a fourth channel adapted to receive the blocking agent which isconnected to the second channel blocking agent may be provided to the second channelvia the fourth channel. Thereby the blocking agent may be provided to the first and thesecond channel through separate channels. This adds redundancy to the nozzle since ifthe third or the fourth channel would malfunction, e.g. by being blocked, blocking agentwill still reach one of the first or second channels and thereby ensure that the components wont mix with each other or with moisture in that channel.
According to some of these embodiments the third channel is connected to thefirst channel upstream of the mixing member and wherein the fourth channel is connectedto the second channel upstream of the mixing member. With upstream of is herein meantupstream relative to the intended flow direction of the components or the blocking agent within the channels.
Since the third and fourth channel is connected to the first and second channelupstream of the mixing member respectively, the blocking agent will be provided into thechannels before the mixing member. Since the components are intended to be mixed inthe mixing member there is a greater risk that the components or mixture of thecomponents moves from the mixing member backwards through the nozzle into thechannels. By connecting the channels upstream of the mixing member, the blocking agentwill extrude the components through the mixing member. Furthermore, the blocking agentwill also provide a barrier for the mixture and the components in the mixing member,preventing them from moving towards and into the channels. Furthermore, the blockingagent may be provided into the mixing member via the channels, thereby extruding the components and any potential mixture still in the mixing member from the mixing member. 6 Thereby no mixture that could cure and block the mixing member will remain in the mixing member. Thus, the risk of blockage in the mixing member is reduced.
According to some embodiments herein the first and the second channel are connected upstream of the mixing member.
By connecting the first and the second channel upstream of the mixing member,the first and the second component will meet before entering the mixing member. Therebythey will mix somewhat before being mixed properly in the mixing member which improves the mixing and thereby the final mixture providing a more reliable final product.
According to some embodiments herein the nozzle comprises a non-return valvein each channel.Alternativelyl only some of the channels comprise a non-return valve, such as e.g. one of the channels, two of the channels or three of the channels.
By providing a non-return valve in each channel it is ensured that no component orblocking agent flow backwards in the system. This reduces the risk that blockages due tocoating or build-up of hardened components or blocking agent are created within thechannels or the system. Thereby the risk of malfunction is reduced which minimizes thenumber of operational stops needed. Thereby the reliability and the efficiency of the rock reinforcement process are improved.
According to some embodiments herein the nozzle has an elongated shape.
Since the nozzle is elongate it is easy to move within a narrow rock hole. Therebythe nozzle is better suited to inject the multi-component mixture directly into the rock holesince the nozzle may be moved within the hole and e.g. placed in the bottom of the rockhole and thereby start filling the hole from the bottom. Thus, since the nozzle is elongate itmay be placed in the bottom of the rock hole and thereafter be moved out of the rock holeas it is injecting mixture into the hole. The maneuverability is furthermore much increased,improving the efficiency of the process since the risk of the nozzle getting stuck in the rock hole is reduced. 7 According to some embodiments the nozzle comprises a groove on the outersurface of the nozzle arranged to receive a sealing package. The sealing package mayhave a size which is larger than the groove such that it sticks out beyond the outer surface of the nozzle.
By providing a sealing package in a groove in the outer surface of the nozzlemixture and/or blocking agent is prevented from flowing over the nozzle during injection ofthe mixture in«to the rock hole. lf the mixture flows over the nozzle the nozzle will becovered by the mixture which may make the disassembling process harder as the mixturemay harden on top of the nozzle. Furthermore, component mixture on the nozzle mayhinder the movement of the nozzle within the rock hole. The nozzle may even get stuck inthe hole in this case. Thus, by providing the sealing package in a groove on the outer surface of the nozzle the process of injecting the mixture into the rock hole is facilitated.
According to some embodiments the nozzle comprises a respective inlet for eachof the channels at a second end of the nozzle opposite the first end of the nozzle andwhere each of the inlets comprises a connection means for connecting a line to therespective inlet. Each of the inlets comprises a connection means for connecting a line tothe respective inlet wherein the channels are completely arranged within the outer walls of the nozzle.
Since the nozzle comprises inlets for each of the channels at a second endopposite of the first end, with connection means for connecting a line to the respectiveinlet the lines carrying the components and/or the blocking agent may extend in the samedirection as the nozzle. Thereby the nozzle will not have any sections or componentsextending substantially in the transversal direction out of the nozzle which could hinderthe movement of the nozzle within narrow rock holes. Thus, the inlets and the connectionsdo not extend outside of the outer diameter of the nozzle, ensuring that the nozzle isadapted for injecting mixture directly into the rock hole by not being bulky and taking upmuch space in the transversal direction. The nozzle will thereby be further adapted toinject the mixture directly into the rock hole, specifically into the bottom of the rock hole,without the need of any auxiliary equipment for that purpose. Furthermore, the maneuverability of the nozzle will be improved. 8 According to some embodiments herein the nozzle is adapted to cooperate with a feeding device capable of moving the nozzle in and out of the rock hole.
By being adapted to cooperate with a feeding device capable of moving the nozzlein and out of the rock hole the nozzle may be moved into the rock hole and out again.Thereby the nozzle may inject the mixture into the bottom of the rock hole and while thehole fills up steadily be moved out of the hole. Furthermore, by adapting the nozzle to cooperate with a feeding device the moving of the nozzle is much facilitated.
The above mentioned object is also achieved according to a second aspect of theinvention by a system for securing a bolt in a rock hole. The system comprises a nozzlefor injecting a multi-component mixture into a rock hole, wherein the mixture is adapted forsecuring a bolt in the rock hole. The nozzle comprising a first channel adapted to receivea first component of the multi-component mixture, a second channel adapted to receive asecond component of the multi-component mixture and a third channel adapted to receivea blocking agent. The third channel is connected to the first channel such that the blockingagent can be provided to the first channel via the third channel. Furthermore, the nozzlecomprises a mixing member adapted to mix the first and the second component prior toinjecting the mixture of the first and the second component into the rock hole. The nozzlefurther comprises an outlet at a first end of the nozzle adapted to inject the mixture of thefirst and the second component directly into the rock hole. The system further comprises a feeding device capable of moving the nozzle relative to the system.
By the system comprising the nozzle having all the advantages that have beendescribed above and a feeding device capable of moving the nozzle relative to thesystem, a system is achieved that can perform rock bolting in an efficient and reliablemanner. Furthermore, since the system performs the bolting, the process is mechanized.Thereby no personnel need to be in areas under the rock that are not secured. Thus, the risk for personnel is reduced.
Consequently, a system for securing a bolt in a rock hole is provided that achieves the above mentioned object.
According to some embodiments herein, the feeding device may be adapted to move the nozzle by interacting with at least one line connected to the nozzle. 9 The at least one line may be arranged Within an outer package. The feedingdevice is then arranged to interact with the outer package in order to move the nozzle.
The feeding device may comprise four feed rollers adapted to move the nozzle.
Since the feeding device is adapted to move the nozzle by interacting with at leastone line connected to the nozzle, and by implication the nozzle being adapted to bemoved by the feeding device in such a way, no extra equipment is needed to move thenozzle. Thus, a simple and robust Way of moving the nozzle is achieved with fewcomponents which may break down. Furthermore, the cost of the nozzle is reduced sincethe lines providing the components and the blocking agent can be reused for the purposeof moving the nozzle.
By arranging the at least one line within an outer package several advantages areachieved. First, the outer package may be made of a tough material which protects thelines during operation which increases the reliability of the system and decreases the riskof failure during operation. Furthermore, the outer package may exhibit characteristicswhich facilitate the movement of the nozzle by the feeding device. For example, the outerpackage may be made of a material which is flexible enough to bend somewhat but stillrigid enough to support the weight of the nozzle when being moved into a rock hole. Anadditional advantage is that the lines may be collected and do not hang looselyindependently of each other with the risk of entangling. Thus, the risk of tangling of hosesis decreased which also decreases the risk of operational stops. Thus, the efficiency ofthe rock bolting process is improved, as Well as the reliability of the process.
Since the feeding device comprises four feed rollers adapted to move the nozzle arobust movement of the feeding device is achieved. Since the nozzle may be relativelyheavy it is advantageous to use several feed rollers. Furthermore, by using four feedrollers a stable configuration is achieved which is advantageous when moving the nozzle via the lines connected to the nozzle.
According to some embodiments herein, the system comprises a first lineconnected to a source of a first component and a second line connected to a source of asecond component.
According to some embodiments the third channel of the nozzle is connected tothe second channel of the nozzle such that blocking agent can be provided to the second channel via the third channel.
Alternatively, according to some embodiments the nozzle may comprise a fourthchannel adapted to receive the blocking agent. The fourth channel is then connected tothe second channel such that the blocking agent can be provided to the second channelvia the fourth channel.
According to some embodiments the system furthermore comprises a third and afourth line connected to a source of a blocking agent. The first, second, third and fourthlines are further connected to the first, second, third and fourth channel of the nozzlerespectively. ln this case the lines connecting the nozzle and the sources may be arrangedwithin the outer package described above.
The system may further comprise a winding member for supporting the lines in awinding manner and which winding member allow the lines to unwind as the nozzle ismoved relatively to the system.
The lines may e.g. be hoses, tubes, flexible pipes, a multichannel hose containing several lines etc.
Since each channel in the nozzle is connected to a source of a respectivecomponent or blocking agent via a respective line, the components of the mixture as wellas the blocking agent may be arranged at a distance from the nozzle. Furthermore, byusing lines the movement of the nozzle relative to the system and the sources of the fluidsis much facilitated. Thereby the nozzle may in an easy and reliable manner be moved intothe rock hole while still being connected to the sources of the mixture components and theblocking agent. The need to move the system is thus decreased since the nozzle will beconnected to the sources of the mixture component and the blocking agent even whenmoved quite far from the system itself. Thus, the reliability and maneuverability of thesystem and nozzle is improved.
By arranging the lines connecting the nozzle with the sources of componentsand/or blocking agent within an outer package all of the advantages described above inconjunction with the at least one line are achieved.
Since the system comprises a winding member which supports the lines andallows the lines to unwind the risk of the lines getting stuck in equipment, the rock hole oreach other is reduced. Furthermore, by being able to wind the lines on the windingmember the feeding device is assisted when moving the nozzle out of the rock hole sincethere will be no line build-up behind the feeding device. Thus, the movement of the nozzle relative to the system is much facilitated by the winding member. 11 The above mentioned object is also achieved according to a third aspect of theinvention by a method for securing a bolt in a rock hole.
The method comprises to place a nozzle into the bottom of a rock hole. The nozzlecomprises a first channel adapted to receive a first component of the multi-componentmixture, a second channel adapted to receive a second component of the multi-component mixture and a third channel adapted to receive a blocking agent. The thirdchannel is connected to the first channel such that the blocking agent can be provided tothe first channel via the third channel. Furthermore, the nozzle comprises a mixingmember adapted to mix the first and the second component prior to injecting the mixtureof the first and the second component into the rock hole. The nozzle further comprises anoutlet at a first end of the nozzle adapted to inject the mixture of the first and the secondcomponent directly into the rock hole.
The method further comprises to inject a multi-component mixture into the rockhole by providing a first and a second component of the multi-component mixture into thefirst and the second channel of the nozzle respectively.
The method further comprises to provide a blocking agent into the first and/orsecond channel of the nozzle.
Furthermore, the method comprises to, while injecting the multi-componentmixture into the rock hole, continuously move the nozzle out of the rock hole by retracting the nozzle from the bottom of the hole towards the entry of the hole.
By performing this method, using the nozzle with all of the advantages describedabove, an efficient and reliable method of securing a bolt in a rock hole is achieved. Themethod may e.g. be performed by the system described above. By placing the nozzle inthe bottom of the rock hole and continuously moving the nozzle out of the rock hole as therock hole is being filled with the multi-component mixture it is ensured that the rock hole isfilled with well-mixed mixture from the bottom in a homogenous manner. Thus, there is norisk that the mixture is not well-mixed or that the rock hole is filled heterogeneously whichcould lead to an inadequate fastening of the bolt. Furthermore, the process can be performed rapidly and in a mechanized manner which reduces the risk of personnel.
Consequently, a method for securing a bolt in a rock hole is provided that achieves the above mentioned object. 12 According to some embodiments the method further comprises to insert a bolt intothe rock hole.The step of inserting the bolt into the rock hole may be performed after the nozzle has been completely removed from the rock hole.
By inserting a bolt into the rock hole the rock hole is reinforced. By inserting thebolt after the nozzle has been completely removed from the rock hole it is ensured thatthe nozzle will not obstruct the bolt when inserting the bolt. Furthermore, by ensuring thatthe nozzle has been completely removed it is also ensured that the rock hole has beenadequately filled before inserting the bolt. Thus, a more reliable method of securing a bolt is achieved.
According to some embodiments the step of providing the blocking agent is performed just before the nozzle has been completely removed from the rock hole.
By injecting the blocking agent into the __r_<_'_a_gç_lg___i_t__çç_i_ga__just before the nozzle has beencompletely removed from the rock hole it is ensured that no blocking agent and/orunmixed component ends up on the ground outside the hole. This is advantageous sinceunmixed component may be a health hazard. By avoiding that the component ends up onthe ground outside the rock hole the risk of any personnel being affected by potentiallyhazardous agents is minimized. Thus, a more reliable method of securing a bolt in a rock hole is achieved.
According to some embodiments the method further comprises, after the step ofinserting the bolt into the rock hole, performing a post insertion treatment of the bolt,wherein the post insertion treatment comprises one or more out of vibrating the bolt, pulsating the bolt and rotating the bolt.
By causing the bolt to rotate, pulsate and/or vibrate inside the rock hole a betteradherence of mixture to the bolt is achieved since the mixture inside the rock hole may fillout any nooks or crannies of the bolt. This advantageous effect may be even morepronounced when the bolt is a cable bolt. lf the bolt comprises bulbs these may be filledby the mixture during this procedure, thereby increasing the adherence of mixture to thecable. Thus, thereby a more reliable and efficient method of securing a bolt in a rock hole is achieved. 13 The vibration may be performed in the axial direction of the bolt. The process ofvibrating the bolt may comprise to continuously move the bolt back and forth in the axialdirection of the bolt over a distance of 1-10 mm, preferably 1-5 mm, most preferably 1-2mm.
The pulsation may be performed in the axial direction of the bolt. The process ofpulsating the bolt may comprise to continuously move the bolt back and forth in the axialdirection of the bolt over a distance of 50-200 mm, preferably 50-150 mm, most preferably80-120 mm. A typical distance may e.g. be 100 mm.
The rotation may be performed by rotating the bolt around an axis of rotation which coincides with the longitudinal axis of the bolt.
The above mentioned object is also achieved according to a fourth aspect of theinvention by a rig adapted to secure a bolt in a rock hole comprising a system where thesystem comprises a nozzle for injecting a multi-component mixture into a rock hole, andthe mixture is adapted for securing a bolt in the rock hole. The nozzle comprises a firstchannel adapted to receive a first component of the multi-component mixture, a secondchannel adapted to receive a second component of the multi-component mixture and athird channel adapted to receive a blocking agent. The third channel is connected to thefirst channel such that the blocking agent can be provided to the first channel via the thirdchannel. Furthermore, the nozzle comprises a mixing member adapted to mix the first andthe second component prior to injecting the mixture of the first and the second componentinto the rock hole. The nozzle further comprises an outlet at a first end of the nozzleadapted to inject the mixture of the first and the second component directly into the rockhole. The system further comprises a feeding device capable of moving the nozzle relative to the system.
The rig may be used in mining and/or construction application for rockreinforcement purposes.
Since the rig has all the advantages that have been described above inconjunction with the nozzle, system and method, a rig is achieved that can perform rockbolting in an efficient and reliable manner. Furthermore, since the rig is adapted forsecuring a bolt in a rock hole the act of reinforcing the rock is facilitated and improvedsince the rig may move the system to new rock sites thus providing flexibility and efficiency to the process. 14 Consequently, a rig adapted for securing a bolt in a rock hole is provided that achieves the above mentioned object.
BRIEF DESCRIPTION OF THE DRAWINGS Additional objects and advantages to, as well as features of, the invention will be apparentfrom the following detailed description of one or several embodiments provided withreference to the accompanying drawings, in which: Fig. 1 shows a system arranged on a rig,Fig. 2a shows a nozzle in a perspective view,Fig. 2b shows the nozzle in an exploded view,Fig. 2c shows a connection plate from a top view,Fig. 2d shows the connection plate in a perspective view,Fig. 3a shows a third element of the nozzle in a perspective view,Fig. 3b shows the third element of the nozzle from a top view,Fig. 3c shows a cross-section of the third element of the nozzle,Fig. 4a shows a second element of the nozzle in a perspective view,Fig. 4b shows the second element of the nozzle from a top view,Fig. 4c shows the second element of the nozzle from a side view,Fig. 4d shows a cross-section of the second element of the nozzle,Fig. 5a shows a first element of the nozzle in two perspective views,Fig. 5b shows a cross-section of the first element of the nozzle,Fig. 5c shows a cross-section of the first element of the nozzle,Fig. 5d shows the first element of the nozzle from a bottom view as seen in the directionof the inlets of the nozzle, Fig. 5e shows the first element of the nozzle from a top view as seen in the directionopposite the inlets of the nozzle, Fig. 6a shows the nozzle in an assembled state in a side view, Fig. 6b shows a cross-section of the nozzle in an assembled state, Fig. 7a shows a cross-section of the nozzle in an assembled state, Fig. 7b shows the nozzle in an assembled state in a side view, Fig. 8a shows a winding member, a feeding device and the nozzle in a perspective view,Fig. 8b shows the nozzle and an outer package containing lines connected to the nozzle in a perspective view, Fig. 9a shows the feeding device from a top view,Fig. 9b shows a cross-section of the outer package containing four lines, and Fig. 10 shows a flow chart illustrating a method for securing a cable bolt in a rock hole.
DETAILED DESCRIPTION The invention will now be described in more detail below with reference to theaccompanying drawings, in which example embodiments are shown. The inventionshould not be construed as limited by the disclosed examples of embodiments; instead itis defined by the appended claims. Like numbers in the figures refer to like elements throughout.
Fig. 1 illustrates a system 1 adapted for securing a bolt in a rock hole. Accordingto a preferred embodiment, the bolt is a cable bolt. ln Fig. 1 the system 1 is arranged on arig 3. The system 1 comprises a nozzle 5 adapted for injecting a multi-component mixtureinto a rock hole. ln Fig. 1 the nozzle 5 is arranged on a front part of the rig 3. The systemmay further comprise a feeding device 7 capable of moving the nozzle 5 relative to thesystem 1 and/or the rig 3, e.g. in and out of a rock hole. The feeding device 7 is in Fig. 1arranged on a crane 8. The feeding device 7 can thereby be positioned independentlyfrom any drilling unit (not shown in Fig. 1) arranged on the rig 3. A number of lines 9 areconnected between the nozzle 5 and tanks 6A, 6B arranged on the rig 3 in order to allowa fluid medium to be transported from the tanks 6A, 6B to the nozzle 5. A windingmember 10 is also arranged on the rig 3. The winding member is arranged to support thelines 9 in a winding manner and allows the lines 9 to unwind or wind up onto the winding member 10 as the nozzle 5 is moved relative to the system 1.
The nozzle 5 according to an embodiment of the invention will now be described ingreater detail with reference to Fig. 2-7. Fig. 2a illustrates the nozzle 5 in an assembledstate and Fig. 2b illustrates the nozzle 5 in a disassembled state or exploded view. Aswas described above, the nozzle 5 is adapted to inject a multi-component mixture into arock hole. The nozzle 5 may comprise a first element 11, a second element 13 and athird element 15. The first 11, second 13 and third 15 elements may be arranged withcomplementary features in order to easily be assembled into the complete nozzle 5. Thenozzle 5 may have a cylindrical shape. The nozzle 5 may be elongate in order to easily fit into narrow rock holes. 16 Fig. 3a-c illustrates the third element 15 according to embodiments herein ingreater detail. The third element 15 may have a substantially cylindrical shape and tapertowards a first end 22 of the nozzle 5. Thus, the third element 15 may comprise a firstsection 35 and a second section 36. The first section 35 may be cylindrical and thesecond section 36 may be frustoconical. The third element 15 may be adapted to beconnected to the second element 13. For this purpose, the third element 15 may comprisea first inner space 31: and a second inner space 33:. The shape of the first inner space31: and the second inner space 33: may be adapted to interact with complementaryshapes of the second element 13 such that part of the second element 13 may bereceived in parts of the third element 15. To this end the first inner space 31: may beadapted to receive a second part 42 of the second element 13 which can be seen in Fig.4a-d. Furthermore, the second inner space 33: may be adapted to receive a first part 41of the second element 13. The first inner space 31: may thus exhibit a complementaryshape to the second part 42 of the second element 13 and the second inner space 33:may exhibit a complementary shape to the first part 41 of the second element 13. The firstinner space 31: and the second inner space 33: of the third element 15 may becylindrically shaped. The second inner space 33: may have a larger diameter than the first inner space 31:.
The second element 13 is shown in Fig. 4a-d. As can be seen, the secondelement 13 may comprise a first part 41, a second part 42, a third part 43 and a fourthpart 44. The parts 41-44 may be cylindrically shaped as is shown in e.g. Fig. 4a. The firstpart 41 and the second part 42 may be arranged to be received in the second inner space33: and the first inner space 31: of the third element 15 as has been described above. Theparts 41-44 may exhibit a successively increasing size such that the second element 13exhibits a straight stair shape when viewed in a cross-section as seen in Fig. 4c. The firstpart 41 may thus have a smaller size than the second part 42, the second part have asmaller size than the third part 43 and the third part have a smaller size than the fourthpart 44. lf the parts 41-44 are cylindrically shaped they will exhibit a successivelyincreasing diameter from the first part 41 to the fourth part 44. The part having the largestsize may have a size which corresponds to the size of the largest part of the first element11 and the size of the largest part of the third element 15. ln this way, the outermostsurface of the nozzle 5 when assembled will be defined by the largest parts of theelements 11, 13, 15. Furthermore, the nozzle 5 will have a substantially constant size along its extension. ln Fig. 4a-4d the fourth part 44 has the largest diameter. 17 When connecting the second element 13 with the third element 15 the outersurface of the assembled configuration will exhibit a groove since the third part 43 of thesecond element 13 has a smaller diameter than the outermost surface of the third element15 and the outermost surface of the second element 13, i.e. the fourth part 44. Thisgroove may be arranged to receive a sealing packet 62 that will be described in greaterdetail below. Other ways of achieving the groove in the nozzle 5 are also contemplated,e.g. a milled groove in the outer surface of the nozzle 5 etc.
The second element 13 may be arranged to interact with first element 11 such thatthe second element 13 may receive parts of the first element 11. Thus, the secondelement 13 may comprise a receiving compartment 45, 46 which is adapted to receive acomplemental end part 51 of the first element 11 which is e.g. illustrated in Fig. 5c. Thus,the end part 51 of the first element 11 may be arranged with an outer surface Which atleast partially exhibit a shape that complements the shape of the receiving compartment45, 46 such that the end part 51 of the first element 11 can be inserted into the receivingcompartment 45, 46 of the second element 13 in order to assemble the nozzle 5. Thereceiving compartment 45, 46 may comprise a first section 45 and a second section 46,the first section 45 having a cylindrical shape and the second section 46 having afrustoconical shape. The end part 51 of the first element 11 may thus exhibit acorresponding form, e.g. by having a cylindrical part and a frustoconical part. Thus, theend part 51 fits snugly within the second section 46 so that when they are assembled a sealed connection betvveen the end part 51 and the second section 46 is achieved.
Fig. 5a-5e illustrate the first element 11 according to embodiments herein. As hasbeen described above, the first element 11 may be arranged to be connected to thesecond element 13 by being adapted to be at least partially received within the secondelement 13. To this end the first element 11 may comprise an end part 51 having acomplementary shape to that of the receiving compartment 45, 46. The end part 51 maythus comprise a first section which is cylindrical and a second section which isfrustoconical. The length of the end part 51 may be somewhat smaller than the length ofthe receiving compartment 45, 46 such that when the end part 51 has been inserted intothe receiving compartment 45, 46 a space is formed in the second section 46 of thesecond element 13 that is not occupied by the end part 51 (see Fig. 6). The length of theend part 51 may alternatively correspond to the length of the receiving compartment 45, 46 such that no space is formed in the second section 46. 18 Thus, by inserting a part of the first element 11 into the second element 13 andinserting a part of the second element 13 into the third element 15, the nozzle 5 may beassembled. The elements 11, 13, 15 may be arranged with threads such that they may bescrewed together during assembly. Even though the nozzle 5 has hitherto been describedas comprising three sections that may be assembled into the complete nozzle 5 it is alsocontemplated that the nozzle 5 comprises fewer or more elements. The nozzle 5 may also be produced as one integral piece, thus only consisting of one element.
Fig. 6a-b illustrate the nozzle 5 in an assembled state. Fig. 6b show the nozzle 5in a cross-section of Fig. 6a (section A-A). As can be seen, the nozzle 5 comprises anoutlet 21 (which is also seen in Fig. 2a-b, Fig. 3a-c and Fig. 4d) arranged at the first end22 of the nozzle 5. The outlet 21 may be arranged on the first part 41 of the secondelement 13 of the nozzle 5 (see Fig. 4a-4d). The first end 22 of the nozzle 5 may becomposed of a part of the second element 13 (see Fig. 4a and Fig. 6) and a part of thethird element 15 (see Fig. 3a-c). When the first part 41 of the second element 13 isinserted into the second inner space 33_“_ of the third element 154 the outlet 21 will thusdischarge out of the first end 22 of the nozzle 5. The outlet 21 is adapted to inject themulti-component mixture directly into a rock hole. As has been described above, the thirdelement 15 may have a cylindrical shape which tapers towards the first end 22 and thusalso towards the outlet 21.
The multi-component mixture, also referred to herein as the mixture, is adapted forsecuring a bolt, e.g. a cable bolt, in the rock hole, i.e. the components in the mixture maybe developed for this purpose. The multi-component mixture may e.g. consist of twocomponents, a first A and a second B component. The first component may contain aresin, such as for example methylene diphenyl isocyanate (MDI) or similar. The secondcomponent may contain a hardener, such as for example sodium silicate, silicic acid, analcohol, a polyol or similar, or a combination thereof. The components A, B are intendedto be mixed into a mixture. When the components have been mixed a chemical reactionwill initiate in the resin as triggered by the hardener whereby crosslinks are created in theresin. As a consequence, the mixture hardens. This process is quite fast. lt isadvantageous to perform the mixing of the components A, B as close to injection of themixture into the rock-hole as possible since this minimizes the risk that the mixturehardens within the system 1 or the nozzle 5 before it has reached the rock hole. ln addition, the amount of spillage during injection is reduced. 19 The components A, B of the multi-component mixture are therefore intended to beprovided to the nozzle 5 unmixed, i.e. separately, and to be mixed within a mixingmember 23 comprised in the nozzle 5. The mixing member 23 may e.g. be comprised inan inner compartment of the second element 13. lt is important that the components A, Bdo not come into contact with each other before they are intended to be mixed, since thismay initiate the chemical reaction within the resin whereby the components A, B mayharden earlier within the system 1 which may lead to blockage and subsequentmalfunction of the system 1.
Therefore, the nozzle 5 comprises a first channel 31 for the first component Aand a second channel 33 for the second component B. The channels 31, 33 are bestseen in Fig. 5b and Fig. 6. The channels 31,33 may be arranged in the first element 11 ofthe nozzle 5. The first element 11 is shown in detail in Fig. 5a-e. The nozzle 5 furthercomprises a first inlet 24 to the first channel 31 and a second inlet 25 to the secondchannel 33. The inlets 24, 25 are arranged on a second end 26 of nozzle 5. The secondend 26 of the nozzle 5 may be opposite the first end 22 of the nozzle 5. By arranging theinlets 24, 25 of the components A, B opposite the outlet 21, the nozzle 5 can be madeelongate, without any lines 9 or elements sticking out far in the transversal direction.Thereby the nozzle 5 can be used in narrow spaces such as narrow rock holes withouthitting the walls of the rock hole and risk getting stuck. This improves the manoeuvrabilityof the nozzle 5. The inlets 24, 25 may comprise a number of connection means 27 (seeFig. 6) for connecting a line 9 to each respective inlet 24, 25. The connection means 27may comprise a connection plate 28 and connectors 29 as shown in Fig. 2a-c and Fig.6. The connection plate 28 is shown from a top view in Fig. 2c and a--from a perspectiveview in Fig. 2d. As can be seen from these figures, the connection plate 28 may bearranged with recessed portions 28a arranged to receive the connectors 29, therebyallowing for a snug fit as well as a compact design. The connection means 27 are not shown in Fig. 5a-e.
The multi-component mixture is intended to be injected into the rock hole throughthe outlet 21. Thus, prior to being injected into the rock hole, the components A and B aremixed such that the mixture is formed. Thus, as has been described above, the nozzle 5therefore comprises the mixing member 23 adapted to mix the first A and the second Bcomponent. The mixing member 23 may be a static mixer. The mixing member 23 maycomprise a number of mixing elements. The mixing elements are arranged to cause the flow pattern of the components A, B to become turbulent in order to achieve a good mixing of the components A, B. The mixing elements may therefore consist of latticestructures or other geometrical shapes which obstructs and disturbs the laminar flowpattern of the components A, B. The mixing member 23 may be comprised in the secondelement 13 and be connected to the outlet 21 such that the mixture may flow from themixing member 23 to the outlet 21. Furthermore, the first 31 and the second 33 channelsmay be connected to the mixing member 23 such that the components A and B may flowfrom the respective channel 31, 33 to the mixing member 23. As the components A, Bflow through the mixing member 23 the mixing elements cause the components A, B to bewhipped into a thixotropic mix before leaving the nozzle 5 through the outlet 21. Prior toentering the mixing member 23, the components A, B may be pre-mixed by the first 31and the second 33 channel being connected upstream of the mixing member 23, e.g. bythe components A, B being discharged from their respective channel 31, 33 into acommon space. The channels 31, 33 may be arranged in the first element 11 of thenozzle 5 wherein the channels 31, 33 may be arranged as a Y-cross, the first element 11may therefore be referred to as a Y-piece 11. With Y-cross is herein meant that thechannels 31, 33 converge at a certain angle into a common channel in the first element 11or e.g. discharge into a common space 46 formed when the end part 51 of the firstelement 11 has been inserted into the receiving compartment 45, 46 of the secondelement 13 as shown in Fig. 6. The components A, B may be mixed to a degree beforeentering the mixing member 23. Fig. 5e shows the first element 11 as viewed in adirection towards the outlets of the channels 31, 33, i.e. according to the embodimentwhen the channels 31, 33 discharge into a common space 46. However, as has beendescribed, there may be no common space 46, instead the channels 31, 33 may discharge directly into the mixing member 23.
The nozzle 5 is further adapted to receive a blocking agent S. The blocking agentS may be an agent with chemical characteristics that ensures that the blocking agent Sdoes not mix or react chemically with either of the components A, B. ln addition, theblocking agent S may have protecting characteristics that protects against wear inside thenozzle 5. The blocking agent S may be a fat and viscous agent such as e.g. fat, siliconeor similar. The blocking agent S may be adapted to, when pumped into the nozzle 5,extrude or push out any remaining component A, B still inside the nozzle 5. Furthermore,the blocking agent S may in addition be adapted to block any channel or line it occupies insuch a way that no component A, B may enter the channel or line after the blocking agent S has been introduced into the channel or line. Thus, the blocking agent S will ensure that 21 the channels or lines in which it is provided are clear of any remaining component A, B.The blocking agent S may be provided to the nozzle 5 via a third inlet 52 and a fourthinlet 53 as can be seen in Fig. 5c and Fig. 7. The third inlet 52 may be connected to athird channel 55 adapted to receive a blocking agent S and the fourth inlet 52 may beconnected to a fourth channel 56 adapted to receive a blocking agent S. The thirdchannel 55 may alternatively be connected to the first channel 31 and the second channel33 such that blocking agent S may be provided to the first 31 and second 33 channel viathe third channel 55. ln this case there is no need for a fourth inlet 53 of the blockingagent S. Alternatively, as is shown in Fig. 5b-c the third channel 55 is connected to thefirst channel 31 and the fourth channel 56 is connected to the second channel 33. ln thisway the blocking agent S may be provided to the first channel 31 via the third channel 55and to the second channel 33 via the fourth channel 56. Fig 5d shows the first element 11as viewed in direction towards the inlets 24, 25, 52, 53. From Fig. 5d it can be seen thatthe inlets are provided symmetrically around the centre point of the cylindrical firstelement 11. By providing blocking agent S separately to each channel it is ensured thatthe blocking agent S flows through both channels and thereby cleans and blocks bothchannels. lf the blocking agent S is provided from a common channel to both channels,there is a risk that the blocking agent S will only flow through one of the channels if thechannels exhibit different pressure drops. The blocking agent S may thus be provided tothe nozzle 5 through the inlets 52, 53 and extrude any component A, B still remaining in the channels 31, 33 and/or the mixer 23.
As can be seen from Fig. 2, 6 and 7 the channels 31, 33, 55, 56 may comprise avalve 61. Each channel 31, 33, 55, 56 may have a dedicated valve 61. Alternatively, onlyone or some of the channels 31, 33, 55, 56 comprise a valve 61 .__The valves 61 may e.g.be non-return valves such as check valves. By providing valves 61 in the channels it isensured that no component A, B or blocking agent S flows in the opposite direction, i.e.towards the inlets 24,25, 53, 54. Thereby there is no risk that the components A, B mix inthe lines 9, blocking the intended flow. Furthermore, there is no risk that the blockingagent S forms a blockage where it is not intended to block the flow of fluid. The blockingagent S may be provided just after the valves 61 in the channels 31, 33. This isadvantageous since this will guarantee that there will be a distance to the position in thenozzle 5 where the components A and B meet. lt is thereby guaranteed that the blocking agent S will form a barrier within the channels 31, 33, preventing the components from meeting within the channels 31, 33. 22 As is illustrated in e.g. Fig. 2a, 2b, 6 and 7 the nozzle 5 may comprise a groove forthe sealing packet 62. The groove may e.g. be milled into the outer surface of the nozzle5. Alternatively, the elements 11, 13, 15 may be shaped such that when they areassembled into the nozzle 5, a groove is formed in the outer surface of the nozzle 5. Anembodiment where this is the case has been discussed in conjunction with the discussionof the second 13 and third element 15 above. The sealing packet 62 may have a sizewhich is a bit bigger than the groove, such that the sealing packet 62 sticks out of theouter surface of the nozzle 5 in order to prevent the component mixture or the b|ocking agent S from flowing over the nozzle 5 during injection of the mixture into the rock hole.
As was mentioned above in conjunction with Fig. 1, the first component A and thesecond component B may be stored in respective tanks 6A, 6B or reservoirs 6A, 6Barranged on the rig 3. The tanks 6A, 6B may be arranged with breather filters in order toensure that no air comes into contact with the components A, B in the tanks 6A, 6B. Theb|ocking agent S may also be stored in one or several tanks or reservoirs (not shown)arranged on the rig 3.~.
The components A, B may be pumped from the tanks 6A, 6B to the nozzle 5 andfurther into the rock hole by pumps (not shown). There may be one pump arranged foreach component A, B, such that the component A and B are pumped by a respectivededicated pump. The pumps pumping the components A, B may e.g. be hydraulicallypowered gear pumps. Flow meters (not shown) may be arranged before or after eachpump in order to measure the flow of the components A, B. The measurements may beused to ensure that the right flow and mix ratio is achieved between the components A, B.Furthermore, filling pumps for filling the tanks 6A, 6B with component A, B may bearranged on the rig 3. These filling pumps may be arranged with filters.
Similarly, the b|ocking agent S may be pumped from the tank containing theb|ocking agent S to the nozzle 5 by pumps. The pump or pumps may e.g. be pistonpumps. ln the case where two lines 9 are used for the b|ocking agent a twin pump, havingtwo channels or lines connected to the two lines 9 may be used. The piston pumps maybe refilled with b|ocking agent S using an air pump, e.g. an air powered grease drumpump. The air pump may also push the piston pump back to its starting position.
The pumps and sensor data may be monitored by a rig control system. Thepumping may thereby be synchronized with the injection of components A, B and b|ocking agent S as well as the movement of the nozzle 5 performed by the feeding device 7. 23 As was described above a number of lines 9 may be connected bet\Neen thestorage of the components A, B and the blocking agent S and the nozzle 5. Thus, some ofthe lines 9 may run from the tanks 6A, 6B to the nozzle 5 and some of the lines 9 may runfrom the tank or tanks storing the blocking agent S and the nozzle 5. With lines 9 is hereinmeant a number of tubes, hoses or similar that provide a fluid communication between thestorage of the components A, B as well as the blocking agent S and the nozzle 5. Therebythe components A, B and the blocking agent S may flow from the storage to the nozzle 5in order to be injected into the rock hole. The blocking agent S may be pumped throughmore than one line 9, e.g. two lines 9, in order to block each channel 31, 33 wherecomponents A, B flow in the nozzle 5. Alternatively, one line 9 may be used for theblocking agent S, which line 9 connects to both channels 31, 33 as has been describedabove. According to a preferred embodiment four lines 9 are used; a first line for the firstcomponent A, a second line for the second component B, and a third and a fourth line forthe blocking agent S. For clarity reasons the invention will be explained below inaccordance with this embodiment, but with the understanding that fewer or more than fourlines 9 may be used.
The system 1 may further comprise a winding member 10 capable of supportingthe lines 9 in a winding manner, i.e. such that the lines are wound around a centre point ofthe winding member 10. The winding member 10 according to some embodiments hereinis shown in greater detail in Fig. 8a. The winding member 10 may e.g. be a hose reel. Thewinding member 10 stores the extra length of the lines 9 when the entire length of the line9 is not used. When the nozzle 5 is moved into the hole by the feeding device 7 thefeeding device 7 is pulling the lines 9 from the winding member 10. When the nozzle 5 isretracted from the hole, the winding member 10 may be turned by a motor (not shown)which winds the lines 9 on the winding member. The motor may e.g. be a hydraulic motor.The winding member 10 may have a swivel 81 arranged in the centre. The swivel mayhave connecting means for each of the lines 9, e.g. one connection means for each line 9leading the components A, B and one connection means for each line 9 leading theblocking agent S. Lines 9 may then lead from the swivel 81 to the sources of thecomponents and/or the blocking agent. Thereby there is no risk of the lines tangling in thewinding member 10 during operation.
The lines 9 may be arranged within an outer package 1§~1~ holding the lines 9together as shown in Fig 8a, Fig. 8b and Fig. 9b. This outer package 13-1- may be a hose or tube. The outer package 131%- may be made out of a material that is flexible but 24 preserves enough rigidity to be able to hold the weight of the nozzle 5 without bending.The material may e.g. be rubber, plastic, PEX tube, shrink tube etc. Fig. 9b illustrates howfour lines 9 may be arranged within the outer package 121. The outer package 124 maybe referred to as a transfer hose 11 and serves the purpose of supplying the componentsA, B and the blocking agent S to the nozzle 5. The outer package 124 further serves thepurpose of simplifying the manoeuvring of the nozzle 5 up and down in the rock hole,since it facilitates the gripping and feeding of the four lines 9 and the nozzle 5.Furthermore, the outer package 132% improves the stability of the nozzle 5 by being able tosupport the weight of the nozzle 5 as explained above, making it easier for the feeddevice 7 to make the nozzle 5 enter the rock hole. ln addition, the outer package 12-1-protects the lines 9 from damage during operation. The outer package 12-1- may comprisea number of first connectors 82 arranged to connect the lines 9 in the outer package 124to the nozzle 5. The outer package 1241 may further comprise a number of secondconnectors (not shown) arranged to connect the lines 9 in outer package 12-1 to the swivel81 in the winding member 10. The outer package 12-1- may alternatively be connecteddirectly to the nozzle 5 and the swivel 81. When the lines 9 are arranged in an outerpackage 124, the outer package 13-1 is wound on the winding member 10.
The feeding device 7 according to an embodiment herein is illustrated in greaterdetail in Fig. 9a. The feeding device 7 is adapted to move the nozzle 5 by interacting withat least one line 9 connected to the nozzle 5. ln Fig. 9a the feeding device 7 interacts withthe outer package 1,21- in order to move the nozzle 5 relative to the system 1 and/or the rig3. Thus, the feeding device 7 may interact indirectly with the lines 9 through the outerpackage 12-1. The feeding device 7 may comprise a number of feed rollers 91 adapted tomove the nozzle 5 relative to the system 1. The feeding device 7 may e.g. comprise twoor four feed rollers 91. According to the embodiment shown in Fig. 9a four feed rollers 91are used. Thereby a stable feeding device 7 is achieved which may move the nozzle 9 ina precise and robust manner. A sensor may be arranged to monitor the position of thenozzle 5 as well as the feeding speed. The sensor may e.g. be a sensor wheel. Thefeeding device 7 may also be arranged to inject a cable bolt into the rock hole after thehole has been filled with the component mixture. For this purpose, the feeding device 7may comprise separate feed rollers for the cable in order to feed the cable into the hole. Asensor may be used in the same manner as for the nozzle 5. Furthermore, a cablebending mechanism, a cable cutter as well as a push cylinder adapted to push the cable into the hole after being cut may be arranged on the feeding device 7 for this purpose.
The system 1 may furthermore comprise a means for performing a post insertiontreatment on the bolt. The post insertion treatment may perform one or more out of:vibrating the bolt, pulsating the bolt or rotating the bolt.
The post insertion means may thus e.g. comprise vibration means. The vibrationmeans may be arranged on the system 1. The vibration means causes the bolt to vibrateafter it has been inserted into the rock hole. By causing the bolt to vibrate is herein meantthat the bolt is caused to move continuously back and forth in the axial direction of the boltover a distance of 1-10 mm, preferably 1-5 mm, most preferably 1-2 mm. The vibrationmeans may e.g. be arranged in conjunction with the feeding device 7. The vibrationmeans may e.g. be the feed rollers 91 whereby the feed rollers 91 cause the bolt tovibrate after having inserted the bolt into the rock hole. Alternatively, the vibration meansis a dedicated vibration means solely designed to cause the vibration of the bolt.
The post insertion means may alternatively or additionally comprise pulsatingmeans. The pulsating means may be arranged on the system 1, e.g. in conjunction withthe feeding device 7. The pulsating means causes the bolt to pulse after it has beeninserted into the rock hole. By causing the bolt to pulse is herein meant that he bolt iscaused to move continuously back and forth in the axial direction of the bolt over adistance of 50-200 mm, preferably 50-150 mm, most preferably 80-120 mm. A typicalpulsating value may e.g. be 100 mm. Similarly to the vibrating case the feed rollers 91may be used to cause the bolt to pulse. Alternatively, a dedicated pulsating means maybe used.
The post insertion means may alternatively or additionally comprise a rotatingmeans Which may be arranged on the system 1, e.g. in conjunction with the feedingdevice 7. The rotating means causes the bolt to rotate. The rotation may exhibit an axis ofrotation which is parallel to the longitudinal axis of the bolt. The rotating means maycomprise a gripping means capable of gripping the bolt. After having gripped the bolt theentire rotating means may rotate in such a manner that the bolt is rotated. Alternatively,only the gripping means of the rotating means is rotated in order to cause the bolt torotate within the rock hole.
By rotating, vibrating and/or pulsating the bolt after it has been inserted into therock hole a better adherence of the mixture to the bolt may be achieved since the mixturemay reach all small holes and bends on the cable and thereby stick to the entire surfacearea of the bolt. This improves the attachment of the bolt to the rock and thereby the rock reinforcement. 26 A method for securing a bolt in a rock hole will now be described in conjunctionwith Fig. 10. The method steps that are optional are marked with dashed lines in the figures. The bolt may e.g. be a cable bolt.
The method steps that are described below may e.g. be performed by a controlunit in a known manner. The method may e.g. be performed by the system 1 described above. The system 1 may then be arranged on a rig 3 and comprise the control unit.
Fig. 10 illustrates an exemplifying method for securing a bolt in a rock hole. Themethod comprises: to place 1001 a nozzle 5 into the bottom of a rock hole, where thenozzle 5 is adapted for injecting the multi-component mixture into the rock hole. Themixture is adapted for securing a bolt in the rock hole. The nozzle 5 comprises the firstchannel 31 adapted to receive a first component A of the multi-component mixture andthe second channel 33 adapted to receive the second component B of the multi-component mixture. The nozzle 5 further comprises a third channel 55 adapted to receivea blocking agent S. The third channel 55 is connected to the first channel 31 such that theblocking agent S can be provided to the first channel 31 via the third channel 55. Thenozzle 5 further comprises a mixing member 23 adapted to mix the first A and the secondB component prior to injecting the mixture of the first A and the second B component intothe rock hole. The nozzle 5 further comprises an outlet 21 at a first end 22 of the nozzle 5adapted to inject the mixture of the first A and the second B component directly into therock hole.
The method further comprises: to inject 1002 the multi-component mixture into therock hole by providing the first A and the second B component of the multi-componentmixture into the first 31 and the second 33 channel of the nozzle 5 respectively.
The method further comprises: to provide 1003 the blocking agent S into the first31 and second 33 channel of the nozzle 5. The blocking agent S may be provided into thefirst 31 and/or second 33 channel of the nozzle 5 via the third channel 55. Alternatively,the nozzle 5 may comprise a fourth channel 56 adapted to receive the blocking agent S,wherein the third channel 55 is connected to the first channel 31 such that the blockingagent S can be provided to the first channel 31 via the third channel 55, and wherein thefourth channel 56 is connected to the second channel 33 such that the blocking agent Scan be provided to the second channel 33 via the fourth channel 56. The blocking agent Sis then provided into the first channel 31 via the third channel 55^.¿ channel 33 via the fourth channel 56. 27 The method further comprises: to, while injecting the multi-component mixture intothe rock hole, continuously move 1004 the nozzle 5 out of the rock hole by retracting thenozzle 5 from the bottom of the hole towards the entry of the hole.
The bolt may e.g. be a cable bolt. The step of continuously moving 1004 thenozzle 5 out of the rock hole may preferably be performed before the step of providing 1003 the blocking agent S into the first 31 and second 33 channel of the nozzle 5.
By following the above described method, the rock hole is filled with a multi-component mixture which will secure a bolt that is placed in the rock hole. Furthermore,the nozzle 5 is readied by extracting any lingering component A, B such that it may fill another rock hole with the mixture.
The method may further comprise: to insert 1005 a bolt into the rock hole.Thereby the bolt Will be secured in the rock hole when the mixture hardens. The rock will thus be reinforced by the bolt.
According to some embodiments the step of inserting 1005 the bolt into the rockhole is performed after the nozzle 5 has been completely removed from the rock hole.Thereby the nozzle 5 will not be hinder the bolt from accessing the rock hole.
According to some embodiments the step of providing 1003 the blocking agent Sis performed just before the nozzle 5 has been completely removed from the rock hole. ln the method described above, the rock hole is considered to have been alreadydrilled. This may also be part of the method. Thus, as a preliminary step the rock holemay be drilled 1000 by a drilling machine arranged on the rig 3.
The method may further comprise: to, after the step of inserting 1005 the bolt intothe rock hole, perform 1006 a post insertion treatment of the bolt inside the rock hole.
The post insertion treatment 1006 may comprise one or more of rotating, vibratingor pulsating the bolt.
By vibrating the bolt is herein meant that the bolt is moved continuously back andforth in the axial direction of the bolt over a distance of 1-10 mm, preferably 1-5 mm, mostpreferably 1-2 mm.
By pulsating the bolt is herein meant that the bolt is moved continuously back andforth in the axial direction of the bolt over a distance of 50-200 mm, preferably 50-150 mm, most preferably 80-120 mm. A typical distance may e.g. be 100 mm. 28 By rotating the bolt is herein meant that the bolt is rotated around an axis ofrotation. The axis of rotation may e.g. coincide with the longitudinal axis of the bolt.
By rotating, vibrating and/or pulsating the bolt after it has been inserted into therock hole a better adherence of the mixture to the bolt may be achieved since the mixturemay reach all small holes and bends on the cable and thereby stick to the entire surfacearea of the bolt. This improves the attachment of the bolt to the rock and thereby the rock reinforcement.
Even though the invention has been described in conjunction with a number ofexamples above, the description is only meant to illustrate inventive concepts and doesnot limit the scope of the invention. Terms such as “blocking agent”, “line” and “multi-component mixture” have for example been used throughout the description, butcorresponding entities, function and/or parameters could also have been used thatcomprise the features and/or characteristics that has been described in conjunction to the terms herein. The invention is defined by the attached patent claims.
Claims (9)
1. 29 CLAll\/IS _ A nozzle (5) for injecting a multi-component mixture into a rock hole, wherein the mixture is adapted for securing a bolt in the rock hole, the nozzle (5) comprising afirst channel (31) adapted to receive a first component (A) of the multi-componentmixture, a second channel (33) adapted to receive a second component (B) of themulti-component mixture, and a third channel (55) adapted to receive a blockingagent (S), wherein the third channel (55) is connected to the first channel (31)such that the blocking agent (S) can be provided to the first channel (31) via thethird channel (55), the nozzle (5) further comprising a mixing member (23) adaptedto mix the first (A) and the second (B) component prior to injecting the mixture ofthe first (A) and the second (B) component into the rock hole, the nozzle (5) furthercomprising an outlet (21) at a first end (22) of the nozzle (5) adapted to inject the mixture of the first (A) and the second (B) component directly into the rock hole. _ The nozzle (5) according to claim 1, wherein the third channel (55) is connected to the second channel (33) such that blocking agent (S) can be provided to the second channel (33) via the third channel (55). The nozzle (5) according to claim 1 comprising a fourth channel (56) adapted toreceive the blocking agent (S), wherein the fourth channel (56) is connected to thesecond channel (33) such that the blocking agent (S) can be provided to the second channel (33) via the fourth channel (56). _ The nozzle (5) according to claim 3, wherein the third channel (55) is connected to the first channel (31) upstream of the mixing member (23) and wherein the fourthchannel (56) is connected to the second channel (33) upstream of the mixingmember (23). _ The nozzle (5) according to any of the previous claims, wherein the first (31) and the second (33) channel are connected upstream of the mixing member (23). _ The nozzle (5) according to any of the previous claims, comprising a non-return valve (61) in each channel (31, 33, 55, 56). 10. 11. 1
2. 1
3. 1
4. 1
5. The nozzle (5) according to any of the previous claims, wherein the nozzle (5) has an elongated shape. The nozzle (5) according to any of the previous claims, wherein the nozzle (5)comprises a groove on the outer surface of the nozzle (5) arranged to receive a sealing package (62). The nozzle (5) according to any of the previous claims, comprising a respectiveinlet (24, 25, 52, 53), for each of the channels (31, 33, 55, 56) at a second end(26) of the nozzle (5) opposite the first end (22) of the nozzle (5), wherein each ofthe inlets (24, 25, 52, 53) comprises a connection means (29) for connecting a line(9) to the respective inlet (24, 25, 52, 53) wherein the channels (31, 33, 55, 56) are completely arranged within the outer walls of the nozzle (5). The nozzle (5) according to any of the previous claims, wherein the nozzle (5) isadapted to cooperate with a feeding device (7) capable of moving the nozzle (5) in and out of the rock hole. A system (1 ) for securing a bolt in a rock hole, comprising a nozzle (5) accordingto any of claims 1-10 and a feeding device (7) capable of moving the nozzle (5) relative to the system (1 ). The system (1) according to claim 11, wherein the feeding device (7) is adapted tomove the nozzle (5) by interacting with at least one line (9) connected to the nozzle (5). The system (1) according to any of claims 11-12, wherein the at least one line (9)_i_§aafle arranged within an outer package (12%) and wherein the feeding device (7) is arranged to interact with the outer package (124) to move the nozzle (5). The system (1) according to any of claims 11-13, wherein the feeding device (7) comprises four feed rollers (91) adapted to move the nozzle (5). The system (1) according to claim any of claims 11-14, comprising a first lineconnected to a source of a first component (A), a second line connected to a source of a second component (B), and a third and fourth line connected to a 1
6. 1
7. 1
8. 1
9. 20. 31 source of a blocking agent (S), wherein the first, second, third and fourth line arefurther connected to the first (31 ), second (33), third (55) and fourth (56) channel of the nozzle (5) respectively. The system (1) according to any of claims 11-15, further comprising a windingmember (10) for supporting the lines (9) in a winding manner and which windingmember (10) allow§ the lines (9) to unwind as the nozzle (5) is moved relatively to the system (1 ). A method for íniectinc; a muâtbcomponeiwt mixture into a rock hole. tlvherein the mixture äs adapted for securing a bolt in ligga rock hole, the method comprising: - placing (1001) a nozzle (5) according to any of claims 1-10 into the bottom of arock hole, - injecting (1002) a multi-component mixture into the rock hole by providing afirst (A) and a second (B) component of the multi-component mixture into thefirst (31) and the second channel (33) of the nozzle (5) respectively, and - providing (1003) a blocking agent (S) into the first (31) and/or second (33)channel of the nozzle (5), - while injecting the multi-component mixture into the rock hole continuouslymoving (1004) the nozzle (5) out of the rock hole by retracting the nozzle (5) from the bottom of the hole towards the entry of the hole. Nflšngt claim WA :nethocl for securing a bolt in a rock hole, fiï; mellhofj further-comprising: ~ šnåectlrta: a multkcomporterat mixture into a rock ltoie accordlrta: to clalm lï, tfxfhereäefi the rnâxlïure is adapted for securing a bolt in the rock hole; and - inserting (1005) a bolt into the rock hole. The method according to claim 18, wherein the step of inserting (1005) the boltinto the rock hole is performed after the nozzle (5) has been completely removed from the rock hole. The method according to any of the claims 17-19, wherein the step of providing(1003) the blocking agent (S) is performed just before the nozzle (5) has been completely removed from the rock hole. 32 21. The method according to any of the claims 18-19, further comprising, after thestep of inserting (1005) the bolt into the rock hole:- performing (1006) a post insertion treatment of the bolt, wherein the post5 insertion treatment comprises one or more out of vibrating the bolt, pulsating the bolt and rotating the bolt. 22. A rig adapted to secure a bolt in a rock hole comprising the system (1) accordingto any of claims 11-16.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1950866A SE543524C2 (en) | 2019-07-08 | 2019-07-08 | Nozzle, system and method for securing a bolt in a rock hole |
| CN202080045906.9A CN114096736B (en) | 2019-07-08 | 2020-07-03 | Nozzle, system and method for fastening a rock bolt in a rock bore |
| AU2020309463A AU2020309463A1 (en) | 2019-07-08 | 2020-07-03 | Nozzle, system and method for securing a bolt in a rock hole |
| EP20739790.2A EP3997308B1 (en) | 2019-07-08 | 2020-07-03 | Nozzle, system and method for securing a bolt in a rock hole |
| CA3142250A CA3142250A1 (en) | 2019-07-08 | 2020-07-03 | Nozzle, system and method for securing a bolt in a rock hole |
| PCT/SE2020/050708 WO2021006802A1 (en) | 2019-07-08 | 2020-07-03 | Nozzle, system and method for securing a bolt in a rock hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1950866A SE543524C2 (en) | 2019-07-08 | 2019-07-08 | Nozzle, system and method for securing a bolt in a rock hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1950866A1 SE1950866A1 (en) | 2021-01-09 |
| SE543524C2 true SE543524C2 (en) | 2021-03-16 |
Family
ID=71579651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1950866A SE543524C2 (en) | 2019-07-08 | 2019-07-08 | Nozzle, system and method for securing a bolt in a rock hole |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3997308B1 (en) |
| CN (1) | CN114096736B (en) |
| AU (1) | AU2020309463A1 (en) |
| CA (1) | CA3142250A1 (en) |
| SE (1) | SE543524C2 (en) |
| WO (1) | WO2021006802A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2021388973A1 (en) * | 2020-11-27 | 2023-07-13 | Construction Research & Technology Gmbh | Grout injection device and method for injecting grout into a longitudinal hole |
| AU2022266849A1 (en) * | 2021-04-27 | 2023-10-12 | Oka Rock Bolt Technologies Pty Limited | A drill head injection system for a self-drilling rock bolt assembly |
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|---|---|---|---|---|
| US3920223A (en) * | 1973-07-05 | 1975-11-18 | Wallace F Krueger | Plural component mixing head |
| WO2001057362A1 (en) * | 2000-02-01 | 2001-08-09 | Fosroc International Limited | Capsule feed system |
| US20070264088A1 (en) * | 2004-10-21 | 2007-11-15 | Archibald Richter | Method for Embedding Rock Anchors |
| US20180066519A1 (en) * | 2016-09-02 | 2018-03-08 | J-Lok Co. | Pumpable Resin System |
| WO2018231118A1 (en) * | 2017-06-14 | 2018-12-20 | Epiroc Rock Drills Aktiebolag | Arrangement and method for rock reinforcement |
| WO2019083430A1 (en) * | 2017-10-27 | 2019-05-02 | Epiroc Rock Drills Aktiebolag | Method and system for ensuring the quality of a multi-component mixture for rock reinforcment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4116368A (en) * | 1976-12-16 | 1978-09-26 | The United States Of America As Represented By The Secretary Of The Interior | Clog-free inorganic grout emplacement gun |
| DE3341283A1 (en) * | 1983-11-15 | 1985-05-23 | Artur Dr.H.C. 7244 Waldachtal Fischer | CONTAINER FOR INJECTING A BINDING AGENT FOR ANCHORING A FASTENING ELEMENT IN A HOLE |
| NO319141B1 (en) * | 2003-06-30 | 2005-06-20 | Fjerby As | Method and apparatus for anchoring rock bolts. |
| EP2232014A1 (en) * | 2007-12-21 | 2010-09-29 | Alminco Pty Ltd | Self drilling rock bolting |
| AU2009202836A1 (en) * | 2008-09-18 | 2010-04-08 | Peter Andrew Gray | An injection, sealing, valving and passageway system |
| DE102009043792B4 (en) * | 2009-09-30 | 2013-04-11 | Hilti Aktiengesellschaft | Two-component mortar compound and its use |
| EP3004547B1 (en) * | 2013-05-27 | 2018-03-21 | Oka Rock Bolt Technologies Pty Limited | A self-drilling rock bolt assembly and method of installation |
| SE541052C2 (en) * | 2015-09-30 | 2019-03-19 | Epiroc Rock Drills Ab | System and method for drilling plan generation, drilling rig, computer program and computer program product |
| SE540076C2 (en) * | 2016-04-12 | 2018-03-13 | Atlas Copco Rock Drills Ab | Method and apparatus for rock reinforcement |
| SE541882C2 (en) * | 2017-06-14 | 2020-01-02 | Epiroc Rock Drills Ab | Arrangement and method for rock reinforcement |
| US11156217B2 (en) * | 2017-11-10 | 2021-10-26 | J-Lok Co. | Hydraulic and control system for resin injection |
-
2019
- 2019-07-08 SE SE1950866A patent/SE543524C2/en unknown
-
2020
- 2020-07-03 CA CA3142250A patent/CA3142250A1/en active Pending
- 2020-07-03 WO PCT/SE2020/050708 patent/WO2021006802A1/en unknown
- 2020-07-03 EP EP20739790.2A patent/EP3997308B1/en active Active
- 2020-07-03 CN CN202080045906.9A patent/CN114096736B/en active Active
- 2020-07-03 AU AU2020309463A patent/AU2020309463A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3920223A (en) * | 1973-07-05 | 1975-11-18 | Wallace F Krueger | Plural component mixing head |
| WO2001057362A1 (en) * | 2000-02-01 | 2001-08-09 | Fosroc International Limited | Capsule feed system |
| US20070264088A1 (en) * | 2004-10-21 | 2007-11-15 | Archibald Richter | Method for Embedding Rock Anchors |
| US20180066519A1 (en) * | 2016-09-02 | 2018-03-08 | J-Lok Co. | Pumpable Resin System |
| WO2018231118A1 (en) * | 2017-06-14 | 2018-12-20 | Epiroc Rock Drills Aktiebolag | Arrangement and method for rock reinforcement |
| WO2019083430A1 (en) * | 2017-10-27 | 2019-05-02 | Epiroc Rock Drills Aktiebolag | Method and system for ensuring the quality of a multi-component mixture for rock reinforcment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114096736A (en) | 2022-02-25 |
| WO2021006802A1 (en) | 2021-01-14 |
| SE1950866A1 (en) | 2021-01-09 |
| EP3997308A1 (en) | 2022-05-18 |
| AU2020309463A1 (en) | 2021-12-02 |
| CN114096736B (en) | 2024-09-20 |
| CA3142250A1 (en) | 2021-01-14 |
| EP3997308C0 (en) | 2024-08-28 |
| EP3997308B1 (en) | 2024-08-28 |
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