Resin injection device, system and method, use of a resin injection system, an underground rock drilling machine, and

Abstract

Resin injection devices, systems, and methods, uses of resin injection systems, subterranean rock drilling rig, and rock anchor installation methods. The invention relates to a resin injection device (60) for an underground rock drilling machine (10), such as a roof jumbolter, anchor cable drilling machine or drill jumbo, having at least one rock drilling machine (12) with a flushing head (14). The invention proposes that the resin injection device (60) comprises an adapter unit (16), which is embodied as a flushing fluid and resin manifold (18), which adapter unit (16) is configured to be inserted directly between the flushing opening (20) of the (original) flushing head (14) and the flushing fluid supply line (22) of the underground rock drilling rig (10).

Description

Existing technology

[0001] The present invention relates to a resin injection device for an underground rock drilling rig according to claim 1, a resin injection system according to claim 23, an underground rock drilling rig according to claim 26, a resin injection system according to claim 27, a resin injection method according to claim 28, and a rock anchor installation method according to claim 29.

[0002] According to existing technology, there are various methods known for injecting resin into anchor holes in underground mine boreholes. However, these methods are often time-consuming (e.g., methods of inserting resin cartridges into newly drilled anchor holes) or expensive (e.g., methods of using hollow self-drilling anchors for resin injection).

[0003] The object of this invention is, in particular, to provide a method with advantageous features in terms of installation efficiency of resin-assisted rock anchors, for example, in underground mines. According to the invention, this object is achieved by the features of the independent claims, while advantageous embodiments and further developments of the invention can be obtained from the dependent claims.

[0004] Advantages of this application

[0005] The present invention relates to a resin injection device for underground rock drilling rigs, such as roof bolt drilling rigs or rock drilling rigs, the resin injection device having at least one rock drill (drifter) with a flushing head.

[0006] The proposed resin injection device includes an adapter unit implemented as a flushing fluid and resin manifold, configured for direct insertion between the flushing port of the (original) flushing head and the flushing fluid supply line of the underground rock drilling rig. This allows for advantageous features regarding the efficiency of resin-assisted rock anchor installation. Advantageously, the resin can be injected directly into newly drilled anchor holes via the drill rod of the rock drill, particularly without the need for hollow self-drilling anchors. Advantageously, all types of anchors or rock anchors (including full-material bolts) can be used with the proposed resin injection device. This can advantageously lead to a significant cost reduction. Furthermore, advantageously, any type of drill rig can be used with the proposed resin injection device. Advantageously, the flushing channel integrated into the drill rod can also be used as a resin injection channel without affecting the reliability of the underground rock drilling rig (particularly its rock drill). Furthermore, by using the proposed resin injection device, the original length of the drill, including the rock drill, can be advantageously maintained, which is particularly beneficial for roof anchor drilling rigs with fixed ceiling heights in underground mine tunnels or roadways. Additionally, by using the proposed resin injection device, the installation time for resin-assisted rock anchors can be significantly shortened.

[0007] Advantageously, an average installation time of less than 5 minutes, preferably even less than 3 minutes, can be achieved, especially compared to 12 minutes when using, for example, resin cartridges. Rock anchor installation is significantly faster than with resin cartridges, particularly because there is no need to switch between drilling equipment and cartridge insertion equipment before installing the rock anchor.

[0008] Underground rock drilling rigs can be implemented as roof bolters or roof bolting rigs, configured to drill holes and install roof support bolts (rock anchors) in the ceiling of underground mining tunnels. Underground rock drilling rigs can also be implemented as cable bolters, configured to drill holes in the ceiling and walls of underground mining tunnels and install cable bolts. Underground rock drilling rigs can also be implemented as drilling jumbos or drilling rigs, particularly deployed for drilling and blasting operations at the mine face. Such underground rock drilling rigs typically include one or more movable booms, particularly drilling booms. These booms can be configured to hold, concentrate, and / or operate drilling equipment, such as rock drills and / or drill strings / drill rods. Rock drills are particularly implemented as rock drilling rigs, preferably as hydraulic rock drilling rigs. The rock drill includes a flushing head, which is specifically configured to supply flushing fluid (e.g., water or air) to an integrated flushing channel of the drill string. The flushing operation is specifically configured to remove drill string dust from the borehole during or immediately after drilling operations. The flushing head is a standard OEM component. The flushing head is preferably integrally formed into the rock drill. The flushing head remains constant by the installation of a resin injection device. Specifically, for the application and / or installation of the resin injection device, no modification or alteration to the OEM flushing head of the rock drill is required. Specifically, for the application and / or installation of the resin injection device, no reinstallation of the drill string into the rock drill is required. Specifically, the term "configuration" is intended to mean specifically programmed, designed, and / or equipped. The fact that an object is configured for a particular function specifically means that the object satisfies and / or performs that particular function in at least one application and / or operating state.

[0009] Specifically, the resin injection device (preferably an adapter unit) is installed upstream of the flushing head. Preferably, the volume of the adapter unit is less than or equal to the volume of the flushing head. Preferably, the flow rate of the adapter unit is greater than or equal to the flow rate of the flushing head. Specifically, the flushing fluid and resin manifold includes a fluid chamber branching into multiple channels or openings, one or more of which are intended for resin flow, one or more of which are intended for flushing fluid flow, and one or more of which are intended for both resin flow and flushing fluid flow. At least one of the channels or openings of the flushing fluid and resin manifold is directly connected to the flushing port of the (OEM) flushing head. At least one of the channels or openings of the flushing fluid and resin manifold is directly connected to the flushing fluid supply line of the underground rock drilling rig. At least one of the channels or openings of the flushing fluid and resin manifold is directly connected to the first resin chemical supply line of the underground rock drilling rig. At least one of the channels or openings of the flushing fluid and resin manifold is directly connected to the second resin chemical supply line of the underground rock drilling rig. The two resin chemicals can come into contact with each other within the fluid chambers of the flushing fluid and resin manifold. Specifically, the mixing of the two resin chemicals triggers a resin hardening reaction. The flushing port of the (OEM) flushing head is preferably implemented as an inlet hole leading into the interior of the flushing head. The flushing fluid supply line is preferably implemented as a hose or pipe that provides a fluid connection to the flushing fluid supply (source, tank, or the like). The flushing fluid supply line is preferably a flushing fluid supply line.

[0010] Furthermore, it is proposed that the adapter unit is configured to be fixedly attached to the flushing head. This advantageously facilitates easy installation. Additionally, it advantageously ensures high operational safety. Preferably, the adapter unit is attached to the housing of the flushing head. Preferably, the adapter unit is attached to the outer periphery of the housing of the flushing head. In particular, the adapter unit is attached to the side surface of the flushing head, especially when viewed from the direction of the rotation axis of the rock drill. Specifically, the adapter unit is fixedly attached such that its outer surface contacts the outer (side) surface of the flushing head.

[0011] Furthermore, it is proposed that the resin injection device includes at least one connecting unit, such as a bolt or screw or a fluid line (hose), for establishing a fixed connection with the flushing head. This advantageously allows for safe and easy installation. The connecting unit is specifically formed separately from the manifold. Preferably, the connecting unit contacts both the manifold and the flushing head to establish the connection. Preferably, the connecting unit penetrates the manifold to establish the connection. Preferably, the connecting unit penetrates the housing of the flushing head to establish the connection. Alternatively, the connecting unit may only contact the outer surface of the flushing head.

[0012] If the connection unit is implemented as a banjo bolt or banjo screw, a particularly advantageous fixation between the manifold and the flush head can be achieved. In particular, this connection method offers high simplicity and a very small number of separate parts. Banjo bolts are, in particular, hollow bolts that allow fluid to transfer from their tip to lateral openings on their radial circumference. Banjo bolts can be implemented with or without threaded portions. The tip of a banjo bolt, having at least a fluid opening, is configured to reach the flush port of the (OEM) flush head, at least in the installed state. The lateral opening of the banjo bolt connects to the passageway or fluid chamber of the manifold. The banjo bolt is configured to penetrate the adapter unit.

[0013] If the connection unit is alternatively implemented as a hydraulic (hose) connector, high flexibility can be achieved, which can advantageously provide high flexibility and / or simplicity. The hydraulic connector includes a connecting element to be securely attached to the flushing head. Preferably, flushing fluid and resin chemicals can be transferred to the flushing head via an opening in the connecting element. Preferably, the hydraulic connector includes (particularly similar to a Banjo bolt) one or more openings on its radial circumference that connect the hydraulic (hose) connector to a passage or fluid chamber in the manifold.

[0014] Furthermore, it is suggested that the connecting unit is configured to guide the resin flow and flushing fluid flow from the adapter unit to the (original) flushing head. This advantageously enables the resin injection flushing head. Advantageously, a particularly simple construction can be achieved, requiring only a minimal number of individual components. Thus, the size and cost of the resin injection device can be advantageously kept low. The resin flow preferably comprises at least one resin chemical or a mixture of at least two resin chemicals. The resin chemical is preferably a liquid precursor chemical that, when mixed with each other, forms a cured synthetic resin. The resin chemical is preferably a synthetic resin chemical known to those skilled in the art. Preferably, the connecting unit, particularly a Banjo bolt or hydraulic (hose) connector, includes an internal flow channel through which the resin flow and flushing fluid flow are permitted, depending on the current configuration of the resin injection device. During flushing operations of the resin injection device / underground rock drilling rig, this internal flow channel is preferably traversed by the flushing fluid, and during resin grouting operations of the resin injection device / underground rock drilling rig, this internal flow channel is preferably traversed by the resin flow.

[0015] Furthermore, it is proposed that the connection unit includes mounting elements (e.g., threads) that are essentially identical to the standardized mounting elements of the flushing fluid supply line for underground rock drilling rigs. This advantageously facilitates particularly easy operation and installation. Preferably, no additional mounting adapter is required. In particular, for installing the resin injection device, it is only necessary to remove the conventionally installed flushing fluid supply line from the flushing head and then install the connection unit at the same interface where the flushing fluid supply line was installed. Moreover, the removed flushing fluid supply line can subsequently be installed at the inlet channel of the adapter unit / manifold.

[0016] If the adapter unit is configured for lateral attachment to the flushing head, space-saving installation can be advantageously achieved. This is especially true in confined underground mining environments where space is a critical factor.

[0017] Advantageously, the cantilever of the underground rock drilling rig, and in particular the overall length of the rock drill-drill assembly, can be preserved. Specifically, the flushing head includes a front side from which the drill string, and in the installed state, protrudes. The side to which the adapter unit is attached radially surrounds the drill string receiving area of ​​the flushing head relative to the longitudinal extension direction of the drill string receiving area / relative to the imaginary axis of rotation of the drill string within the flushing head.

[0018] Furthermore, exceptionally high operational safety can be achieved if the adapter unit does not come into contact with any other part of the rock drill besides the flushing head. Additionally, particularly easy installation and / or construction can be advantageously achieved.

[0019] Furthermore, it is proposed that the adapter unit, particularly the manifold, includes a first supply port for flushing fluid and a second supply port for resin chemicals. This advantageously enables the flushing head to be used as a (switchable) resin supplier. The first and second supply ports are separate from each other. The first and second supply ports preferably lead to separate channels in the manifold, both of which in turn lead to the fluid chamber of the manifold. The first supply port is preferably configured for connection to the flushing fluid supply line of the underground rock drilling rig. The second supply port is preferably configured for connection to the first resin chemical supply line or resin chemical supply line of the underground rock drilling rig.

[0020] Furthermore, it is proposed that the adapter unit, particularly the manifold, also includes a third supply port for a second resin chemical, specifically different from the first resin chemical. This advantageously enables the flushing head to be used as a (switchable) resin supplier. The third supply port is separate from the first supply port and also separate from the second supply port. The third supply port is preferably connected to a passage in the manifold that is separate from the other two supply ports and leads to the fluid chamber of the manifold. The third supply port is preferably configured for connection to a second resin chemical supply line or supply of the second resin chemical for an underground rock drilling rig. The resin chemical is preferably a liquid. The resin chemical preferably cures only when it comes into contact with each other.

[0021] It is also proposed that the adapter unit includes a connecting line fluidly connected to at least a first and a second supply port, and particularly to a third supply port. This advantageously enables the flushing head to be used as a (switchable) resin supplier. The connecting line of the adapter unit is particularly identical to the fluid chamber of the manifold. The connecting line preferably serves as a mixing line for mixing the resin chemicals with each other. Depending on the operating state of the resin injection device, the connecting line may deliver only flushing fluid or only resin chemicals.

[0022] Furthermore, it is proposed that the adapter unit includes (particularly a single) discharge port. This allows for advantageously easy switching between flushing and resin grouting operations. The discharge port is configured to discharge flushing fluid only during flushing operations of the rock drill / underground rock drilling rig. The discharge port is configured to discharge resin chemicals only during resin grouting operations of the underground rock drilling rig. Preferably, the adapter unit does not have any additional discharge ports. In particular, the discharge port is fluidly connected to the manifold connection line / fluid chamber.

[0023] If the discharge port also forms a mounting hole for the connecting unit (e.g., a Banjo bolt), a compact and simple construction can be advantageously achieved. In particular, during the installation of the resin injection device to the flushing head, the connecting unit (e.g., a Banjo bolt or a hydraulic coupling) passes through the discharge port from the side opposite to the side that contacts the flushing head in the installed state.

[0024] Furthermore, it is proposed that the direction in which the fluid, particularly a liquid, preferably a mixed resin chemical, flows out of the adapter unit is at least substantially perpendicular to the direction in which the fluid, particularly a liquid, preferably an unmixed resin chemical, flows into the adapter unit. This allows for an advantageously compact construction. Additionally, a particularly easy-to-operate resin injection device can be provided, and the supply port is easily accessible. The expression "substantially perpendicular" here specifically defines an orientation relative to a reference direction that forms an angle of 90° with the reference direction (especially when viewed in a plane), and the maximum deviation of this angle is particularly less than 8°, preferably less than 5°, and more preferably less than 2°.

[0025] Furthermore, it is proposed that the resin injection device includes at least one check valve configured to prevent backflow of liquid (especially resin chemicals) against the supply direction / against the direction of flow into the adapter unit. This advantageously achieves particularly high operational safety. Specifically, it advantageously prevents backflow of resin chemicals into the flushing fluid supply line. The check valve is preferably installed at one of the supply ports.

[0026] If a first check valve is installed at the first supply port and a second check valve at the second supply port, and preferably a third check valve at the third supply port, all possible backflow paths can be advantageously protected. Advantageously, high operational safety and / or high operational reliability can be achieved. The first check valve is preferably installed at least in a liquid-tight manner at the first supply port. The first check valve is particularly internally mounted to the adapter unit, preferably by screwing the first check valve into the internal thread of the first supply port of the adapter unit (especially the manifold). The second check valve is preferably installed at least in a liquid-tight manner at the second supply port. The second check valve is particularly internally mounted to the adapter unit, preferably by screwing the second check valve into the internal thread of the second supply port of the adapter unit (especially the manifold). The third check valve is preferably installed at least in a liquid-tight manner at the third supply port. The third check valve is particularly internally mounted to the adapter unit, preferably by screwing the third check valve into the internal thread of the third supply port of the adapter unit (especially the manifold). The check valves are preferably arranged separately from each other.

[0027] Furthermore, the check valve includes a (preferably spring-loaded) disc-shaped lift valve to implement the check mechanism. This allows for high operational safety and / or high operational reliability. A first side of the disc-shaped lift valve provides a first actuating surface for the check valve. A second side of the disc-shaped lift valve (opposite to the first side) provides a second actuating surface for the check valve. The check valve opens or closes depending on which side of the disc-shaped lift valve experiences a higher pressure. For example, if the pressure on the first side of the disc-shaped lift valve is greater, the lift valve is pushed in the closing direction, thereby preventing flow through the check valve. For example, if the pressure on the second side of the disc-shaped lift valve is greater, the lift valve is pushed in the opening direction, thereby allowing flow through the check valve. Preferably, the check valve includes a spring that is tensioned when the lift valve is actuated in the opening direction and relaxed when the lift valve is actuated in the closing direction, and vice versa. Preferably, the check valves are implemented in at least substantially the same manner. Preferably, the check valves are configured in a normally closed (NC) basic state.

[0028] Furthermore, it is proposed that a disc lift valve be arranged outside the flow line of the check valve. This advantageously achieves high operational safety and / or high operational reliability. This is particularly because it prevents flushing fluid (which in some cases may be very high salinity water) from entering the check valve, especially its flow line. Specifically, in check valves that occasionally or regularly transport resin chemicals, such high salinity water can cause scaling within the flow line of the check valve, leading to undesirable blockage of the lift valve, i.e., check valve failure. Specifically, the check valve is installed in the corresponding supply port of the adapter unit / manifold, wherein the lift valve faces away from the corresponding supply line / where the lift valve faces the interior of the manifold / fluid chamber / connecting line. Preferably, the check valve is not equipped with any closing ball or bulb. Specifically, the lift valves of the check valves installed in the second and third supply ports are configured to prevent flushing fluid from flowing into the corresponding resin chemical supply lines and the flow line of the check valve.

[0029] If the adapter unit is implemented as a single piece, particularly a monolithic component, a particularly simple, low-cost, and stable construction can be advantageously achieved. The term "single piece" is intended to specifically refer to material joining, for example, by welding and / or gluing processes, and is particularly advantageously formed, for example, by production from a single casting and / or by production in a single-component or multi-component injection molding process. However, monolithic components are preferably made from a single, complete piece.

[0030] Furthermore, the adapter unit, particularly the manifold, is made of a corrosion-resistant material. This advantageously allows for a long service life, especially in harsh underground mining environments. In particular, the material of the adapter unit (preferably the manifold) exhibits high corrosion resistance under high salinity conditions. The adapter unit (particularly the manifold) can be made, for example, of aluminum or stainless steel.

[0031] If the adapter unit can be installed into the underground rock drilling rig while maintaining the original drill string length, high applicability in confined mining tunnels can be advantageously achieved. In particular, the possibility of drilling vertical holes with the underground rock drilling rig to install roof anchors is not hindered at all by the resin injection device. "Drill string length" should be understood specifically as the total length of the drill string, including the drill bit, drill rod, and rock drill.

[0032] Furthermore, a resin injection system is proposed, comprising: a resin injection device, a rock drill with a flushing head, and a drill string with at least one integrated flushing channel, and / or an underground rock drilling rig, particularly a roof bolt drilling rig, cable bolt drilling rig, or drilling jumbo, incorporating the resin injection system. This allows for advantageous features regarding the efficiency of resin-assisted rock anchor installation. Advantageously, an average installation time of less than 5 minutes, preferably even less than 3 minutes, can be achieved. Furthermore, advantageous applicability in confined mining tunnel spaces is achieved. The integrated flushing channel of the drill string preferably runs through the center of the drill string along its longitudinal extension direction.

[0033] Furthermore, it is proposed that the flushing head includes at least one indicator orifice configured to indicate the presence of a fault condition (particularly a blockage and / or leakage). This advantageously enables high operational safety. Specifically, the indicator orifice is configured to provide a signal or indication when the internal flushing seal of the flushing head begins to fail, thereby completely stopping the supply of resin chemicals and preventing water from entering any hydraulic system of the rock drill and / or underground rock drilling rig. The signal or indication provided by the indicator orifice may be that flushing fluid leaks from the indicator orifice to the outside of the flushing head.

[0034] Furthermore, the use of a resin injection system and / or underground rock drilling rig is proposed for the resin grouting installation of all-material rock anchors (particularly different from self-drilling anchors). This advantageously enables particularly rapid, easy-to-set-up, and low-cost installation of all-material rock anchors.

[0035] Furthermore, a resin injection method for underground drilling rigs (e.g., roof bolt drilling rigs, cable drilling rigs, or rock drilling jumbos) is proposed. This method utilizes a rock drill with a flushing head, particularly via a resin injection device, wherein an adapter unit, implemented as a flushing fluid and resin manifold, is directly inserted between the flushing port of the underground rock drill's flushing head and the flushing fluid supply line, and preferably is fixedly attached to the flushing head. This allows for advantageous features regarding the efficiency of resin-assisted rock anchor installation. Advantageously, the resin can be injected directly into newly drilled anchor holes via the rock drill's rig, particularly without the need for hollow self-drilling anchors. Advantageously, all types of anchors or rock anchors (including all-material anchors) can be used with the proposed resin injection device.

[0036] Furthermore, a method for installing rock anchors, particularly via a resin injection device, is proposed. In a first step, a rock surface is drilled using a rock drill with a flushing fluid flowing through a flushing channel and toward the drill tip outlet under conditions of continuous or intermittent flushing. The rock drill includes a drill bit with at least one integrated flushing channel. In a second step, a resin mixture is introduced into the borehole via the flushing channel from the drill tip outlet, thereby filling the borehole. In a third step, the rock anchor is inserted into the resin-filled borehole. This provides advantageous features regarding the efficiency of resin-assisted rock anchor installation. Advantageously, all types of anchor bolts or rock anchors (including all-material anchor bolts) can be used with the proposed resin injection device. Advantageously, high installation speeds can be achieved.

[0037] The resin injection device, resin injection system, underground rock drilling rig, application of resin injection system, resin injection method, and installation method according to the present invention are not limited to the applications and embodiments described above. In particular, to achieve the functions described herein, the resin injection device, resin injection system, underground rock drilling rig, application of resin injection system, resin injection method, and installation method may include a number of corresponding elements and / or structural components and / or units and / or method steps that differ from the numbers mentioned herein. Attached Figure Description

[0038] Further advantages will become apparent from the description of the following figures, in which an exemplary embodiment of the invention is depicted. The figures, description, and claims contain combinations of multiple features. Those skilled in the art will also purposefully consider these features individually and will find further advantageous combinations.

[0039] It is shown below:

[0040] Figure 1 This is a schematic side view of an underground rock drilling rig with a resin injection system.

[0041] Figure 2 A schematic cross-sectional view of a modern rock drill, including a flushing head, used for underground rock drilling.

[0042] Figure 3 A schematic transparent top view of the resin injection device in a resin injection system.

[0043] Figure 4 A schematic transparent side view of the resin injection device.

[0044] Figure 5 This is a schematic exploded view of the resin injection device.

[0045] Figure 6 This is a schematic perspective view of a resin injection device, in which the adapter unit of the resin injection device is fixedly attached to the rinsing head.

[0046] Figure 7 This is a schematic flowchart illustrating the installation method of installing rock anchors via a resin injection device.

[0047] Figure 8a This is a schematic diagram of the first step of the installation method.

[0048] Figure 8b This is a schematic diagram of the first part of the second method step in the installation method.

[0049] Figure 8c This is a schematic diagram of the second part of the second method step in the installation method.

[0050] Figure 8d This is a schematic diagram of the third step in the installation method.

[0051] Figure 8e This is a schematic diagram of a rock anchor that has been fully installed using an installation method. Detailed Implementation

[0052] Figure 1 A schematic side view of an underground rock drilling rig 10 is shown. The underground rock drilling rig 10 is exemplarily embodied as a roof anchoring rig, which, among other features, is configured to install rock anchors 68 (also referred to as anchors) into the ceiling 86 of a mining tunnel. The underground rock drilling rig 10 includes a movable cantilever 80. The underground rock drilling rig 10 includes a resin injection system 58. The resin injection system 58 (specifically the underground rock drilling rig 10) includes a rock drill 12. The resin injection system 58 (specifically the underground rock drilling rig 10) includes a drill string 62. The rock drill 12 is configured to operate the drill string 62. The drill string 62 includes a drill rod 88 that is inserted into and rotated by the rock drill 12. The drill string 62 is hollow. The drill string 62 includes an integrated flushing channel 64 (see...). Figure 2 The rock drill 12 includes a flushing head 14. The flushing head 14 is configured to introduce flushing fluid (e.g., water, brine, or air) into an integrated flushing channel 64 of the drill string 62. The rock drill 12 is attached to the cantilever 80.

[0053] Figure 2 A cross-sectional view of a portion of a rock drill 12, including a flushing head 14, is shown schematically. Figure 2 The flushing head 14 shown is a standard, modern flushing head 14. Figure 2The flushing head 14 shown is the original flushing head 14. Figure 2 The flushing head 14 shown is a common OEM flushing head 14 found in many rock drills 12. The (original) flushing head 14 includes a flushing port 20. The flushing port 20 is implemented as a through-hole through the radial housing of the flushing head 14. The underground rock drill 10 includes a flushing fluid supply line 22. The flushing fluid supply line 22 is connected to a flushing fluid source or flushing fluid tank (not shown). The flushing fluid supply line 22 is configured to supply flushing fluid. Figure 2 In the standard configuration shown, the flushing fluid supply line 22 is connected to the flushing port 20 of the flushing head 14. Figure 2 In this embodiment, the intermediate component 90 serves as an adapter between the end of the flushing fluid supply line 22 and the flushing port 20. It is also conceivable to install the end of the flushing fluid supply line 22 directly without the intermediate component 90. The drill string 62 includes an inlet 92 that allows flushing fluid to flow from inside the flushing head 14 into the integrated flushing channel 64 of the drill string 62. The drill string 62 includes an outlet 94 at the opposite end of the integrated flushing channel 64, particularly at the tip of the drill string 62, through which the flushing fluid delivered by the integrated flushing channel 64 can be ejected. The integrated flushing channel 64 of the drill string 62 is not limited to delivering flushing fluid. Liquid resin or liquid resin chemicals may also be delivered by the integrated flushing channel 64 of the drill string 62.

[0054] The resin injection system 58 includes a resin injection device 60. Figure 3 A schematic transparent top view of the resin injection device 60 is shown. Figure 4 A transparent side view of the resin injection device 60 is shown schematically. Figure 5 An exploded view of the resin injection device 60 is shown schematically. The resin injection device 60 includes an adapter unit 16. The adapter unit 16 is implemented as a flushing fluid and resin manifold 18. The adapter unit 16 is configured to be directly inserted between the flushing port 20 of the (original) flushing head 14 of the underground rock drilling rig 10 and the flushing fluid supply line 22. (See again...) Figure 2 The adapter unit 16 essentially replaces Figure 2 The middleware 90. The adapter unit 16 is made of corrosion-resistant material. The adapter unit 16 is implemented as a single piece. The adapter unit 16 is implemented as an integral piece. The adapter unit 16 is made of metal (particularly aluminum).

[0055] Adapter unit 16 includes a first supply port 30. The first supply port 30 is configured as an inlet for flushing fluid. The first supply port 30 is configured to connect to an end of the flushing supply line 22 of the underground rock drilling rig 10. The first supply port 30 is connected to a first supply passage 84 of manifold 18. Flushing fluid is introduced into manifold 18 via the first supply passage 84. Adapter unit 16 includes a second supply port 32. The second supply port 32 is configured as an inlet for a first resin chemical. The second supply port 32 is configured to connect to an end of the first resin chemical supply line 96 of the underground rock drilling rig 10 or an external source. The second supply port 32 is connected to a second supply passage 98 of manifold 18. The (liquid) first resin chemical is introduced into manifold 18 via the second supply passage 98. Adapter unit 16 includes a third supply port 34. The third supply port 34 is configured as an inlet for a second resin chemical. The second resin chemical is different from the first resin chemical. When the first and second resin chemicals are mixed, the resin hardening process begins, causing the initially liquid resin chemicals to solidify within a short period of time (minutes to tens of minutes). A third supply port 34 is configured to connect to the end of the second resin chemical supply line 100 of the underground rock drilling rig 10 or an external source. The third supply port 34 connects to the third supply channel 102 of the manifold 18. The (liquid) second resin chemical is introduced into the manifold 18 via the third supply channel 102. Supply channels 84, 98, and 102 are implemented as orifices.

[0056] The adapter unit 16 includes a connecting line 36. The connecting line 36 is fluidly connected to a first supply port 30. The connecting line 36 is fluidly connected to a second supply port 32. The connecting line 36 is fluidly connected to a third supply port 34. The connecting line 36 forms a fluid chamber 82 of the manifold 18, connecting all supply channels 84, 98, 102 to a discharge channel 104 of the adapter unit 16. The adapter unit 16 includes a single discharge port 38. The discharge port 38 is configured for the outlet / discharge of fluid that has entered the connecting line 36 through one or more supply channels 84, 98, 102. In the flushing operation mode of the resin injection device 60, flushing fluid is discharged from the discharge port 38. In the resin grouting operation mode of the resin injection device 60, a mixture of a first resin chemical and a second resin chemical is discharged from the discharge port 38. The discharge port 38 is configured to connect to the flushing port 20 of the flushing head 14. The discharge port 38 is connected to the discharge channel 104 of the manifold 18. Fluid from connecting line 36 is discharged via discharge channel 104 and exits manifold 18. Discharge channel 104 is implemented as an orifice. Resin injection device 60 includes plug element 106 configured to close the orifice forming connecting line 36, isolating it from the outside (other than the aforementioned channels 84, 98, 102, 104). Plug element 106 is not specifically part of the integral adapter unit 16 / manifold 18. Adapter unit 16 defines an inflow direction 44 for fluids, particularly liquids, preferably unmixed resin chemicals and / or flushing fluids. Adapter unit 16 defines an outflow direction 42 for fluids, particularly liquids, preferably mixed resin chemicals and / or flushing fluids. The outflow direction 42 of adapter unit 16 is perpendicular to the inflow direction 44 of adapter unit 16.

[0057] The resin injection device 60 includes check valves 46, 50, and 52. The check valves are configured to prevent backflow of liquid against their supply direction 48. A first check valve 46 is installed at a first supply port 30. A second check valve 50 is installed at a second supply port 32. A third check valve 52 is installed at a third supply port 34. All three check valves 46, 50, and 52 are implemented identically. Check valves 46, 50, and 52 are screwed into corresponding supply channels 84, 98, and 102. Check valves 46, 50, and 52 include a lift valve 54 for implementing the check mechanism. The lift valve 54 is disc-shaped and spring-loaded. Check valves 46, 50, and 52 are normally closed check valves. Each check valve 46, 50, and 52 includes a valve seat 108. When the respective lift valve 54 of check valves 46, 50, and 52 is on its valve seat 108, the flow of fluid through the respective check valves 46, 50, and 52 is blocked. When the respective lift valve 54 of check valves 46, 50, and 52 is lifted off its valve seat 108, the flow of fluid through the respective check valves 46, 50, and 52 is permitted. Check valves 46, 50, and 52 are installed in their respective supply channels 84, 98, and 102 such that the lift valve 54 protrudes into the connecting line 36. Each of check valves 46, 50, and 52 includes a flow tube 56. External threads 110 for installing check valves 46, 50, and 52 by screwing them into their respective supply channels 84, 98, and 102 are cut into the flow tube 56. Supply channels 84, 98, and 102 each include an internal thread 112, which is configured to correspond to the thread 110 of check valves 46, 50, and 52. Fluid passing through check valves 46, 50, and 52 is conveyed through the corresponding flow tube 56. A lift valve 54 is disposed outside the flow tube 56 of the corresponding check valve 46, 50, and 52. The lift valve 54 is disposed in front of the flow tube 56 of the corresponding check valve 46, 50, and 52. A valve seat 108 is disposed at the inner end of the flow tube 56 of the corresponding check valve 46, 50, and 52.

[0058] The adapter unit 16 is configured to be fixedly attached to the flushing head 14. Figure 6 The resin injection device 60 is schematically shown, with its adapter unit 16 fixedly attached to the flushing head 14. The adapter unit 16 is configured for lateral attachment to the flushing head 14. The adapter unit 16 can be mounted to the underground rock drilling rig 10 in a manner that maintains the original drill bit length of its drill bit 62. The adapter unit 16 does not contact any other part of the rock drill 12 except for the flushing head 14. The flushing head 14 includes an indicator hole 66. The indicator hole 66 is configured to indicate the presence of a malfunction condition (particularly a blockage and / or leakage) of the flushing head 14 and / or the resin injection system 58.

[0059] The resin injection device 60 includes a connecting unit 24. The connecting unit 24 is configured to establish a fixed connection between the adapter unit 16 and the flushing head 14. The connecting unit 24 is implemented as a bolt, particularly a screw bolt. The connecting unit 24 is implemented as a Banjo bolt 26 (see...). Figure 3 , Figure 4 or Figure 5 Alternatively, the connecting unit 24 can also be implemented as a fluid line (hose). In this case, the connecting unit 24 can be implemented as a hydraulic connector. The connecting unit 24 (in particular the Banjo bolt 26) penetrates the adapter unit 16 (in particular the manifold 18).

[0060] The connecting unit 24 is configured to guide the resin flow and flushing fluid flow from the adapter unit 16 to the (original) flushing head 14. The connecting unit 24 (specifically the Banjo bolt 26) is partially hollow. The connecting unit 24 (specifically the Banjo bolt 26) provides an internal flow passage 118. The internal flow path of the connecting unit 24 leads from the connecting line 36 / fluid chamber 82 to the discharge port 38. The discharge port 38 (specifically the discharge passage 104) also forms a mounting hole for the connecting unit 24 (specifically the Banjo bolt 26).

[0061] The Banjo bolt 26 includes a bolt head 40. The bolt head 40 is configured to seal the discharge passage 104 and / or the mounting hole of the connecting unit 24 from a side 114 of the adapter unit 16 opposite to the side 116 of its contact flushing head 14 in the installed state. The bolt head 40 additionally includes a tool surface for applying an installation tool (e.g., a wrench). The Banjo bolt 26 includes one or more lateral inlet holes 120. The inlet holes 120 allow fluid to flow into the internal flow passage 118 of the Banjo bolt 26. The inlet holes 120 are arranged in the intermediate region of the longitudinal extension of the Banjo bolt 26. The inlet holes 120 of the Banjo bolt 26 are located in the region of the Banjo bolt 26 located inside the adapter unit 16 in the installed state. The inlet holes 120 of the Banjo bolt 26 are fluidly connected to the connecting line 36 / fluid chamber 82 in the installed state. The Banjo bolt 26 includes an end region 122 that protrudes from the adapter unit 16 in the installed state. The end region 122 is configured to be installed into the flush port 20 of the flush head 14 in the installed state. The connection unit 24 includes a mounting element 28 for installing the connection unit 24 into the flush head 14, particularly into the flush port 20 of the flush head 14. The mounting element 28 may be implemented as a threaded or press-fit element or the like. The mounting element 28 is substantially the same as the standardized mounting element 124 of the flushing fluid supply line 22 of the underground rock drilling rig 10 (see, for example...). Figure 2The same applies. The end region 122 of the Banjo bolt 26 includes an opening 126 of an integrated flow channel 118 through which fluid entering the flow channel 118 through the inlet hole 120 can flow out of the flow channel 118. The opening 126 allows fluid to flow out in a direction parallel to the longitudinal extension direction of the Banjo bolt 26, particularly in the outflow direction 42 of the adapter 16. The connecting unit 24 may be the only element that establishes a fixed connection between the resin injection device 60 and the flushing head 14. Alternatively, the resin injection device 60 may include additional connecting elements besides the connecting unit 24. Figure 3 and Figure 5 The adapter unit 16 shown exemplarily includes two additional mounting holes 128, which can be used with these additional connecting elements.

[0062] Figure 7 A schematic flowchart illustrating an installation method for installing a rock anchor 68 via a resin injection device 60 is shown. This installation method includes a resin injection method for an underground rock drilling rig 10, which uses the resin injection system 58 of the underground rock drilling rig 10 to perform resin grouting installation of the rock anchor 68. This installation method can be applied to all types of rock anchors 68. This installation method can be applied to all-material rock anchors 68. This installation method can be applied to rock anchors 68 that differ from self-drilling anchors. Figures 8a to 8e The key steps of the installation method are illustrated schematically.

[0063] In the first method step 70, a hole 72 is drilled in the rock surface 74 by the rock drill 12 of the underground rock drilling rig 10. The rock drill 12 includes a drill bit 62 having an integrated flushing channel 64. In the first method step 70, the hole 72 is drilled under conditions of continuous or intermittent flushing of the hole 72, during which flushing fluid flows through the integrated flushing channel 64 and flows to the outlet 94 at the tip of the drill bit 62 (see also...). Figure 8a During the first method step 70, check valves 50 and 52 installed at the second supply port 32 and the third supply port 34 are closed because the pressure of the flushing fluid in the connecting line 36 is greater than the pressure in the resin chemical supply lines 96 and 100. During the first method step 70, check valve 46 installed at the first supply port 30 is opened because the pressure of the flushing fluid in the flushing fluid supply line 22 is approximately greater than or equal to the pressure in the connecting line 36 and greater than the force with which the corresponding spring-loaded lift valve 54 is held on its valve seat 108. These pressure differences and the resulting setup state of the adapter unit 16 are achieved by controlling the pressure inside the three supply lines 22, 96, and 100 connected to the adapter unit 16.

[0064] In the second method step 76, the borehole 72 is subsequently filled with a mixture of two resin chemicals. This mixture of two resin chemicals is introduced into the drilled and flushed borehole 72 via a flushing channel 64 from the outlet 94 at the tip of the drill bit 62 (see also...). Figure 8b The switching from spraying flushing fluid to spraying a mixture of two resin chemicals is controlled by adapter unit 16 and by regulating the pressure inside the three supply lines 22, 96, and 100 connected to adapter unit 16. During second method step 76, check valves 50 and 52 installed at the second supply port 32 and the third supply port 34 open because the pressure of the respective resin chemicals in the resin chemical supply lines 96 and 100 is approximately greater than or equal to the pressure in the connecting line 36 and greater than the force with which the corresponding spring-loaded lift valve 54 is held on its valve seat 108. During second method step 76, check valve 46 installed at the first supply port 30 closes because the pressure of the flushing fluid in flushing fluid supply line 22 is less than the pressure in the connecting line 36. These pressure differences and the resulting setting state of adapter unit 16 are achieved by regulating the pressure inside the three supply lines 22, 96, and 100 connected to adapter unit 16. In the second method step 76, the drill bit 62 is slowly pulled out of the hole 72 while a mixture of two resin chemicals is continuously injected into the hole 72 until the hole 72 is completely or almost completely filled with the mixture (see [link to method]). Figure 8c ).

[0065] In the third method step 78, the rock anchor 68 is inserted into the resin-filled hole 72 (see...). Figure 8d During step 78 of the third method, drill string 62 does not eject fluid. All check valves 46, 50, and 52 of adapter unit 16 are closed because the pressure in all supply lines 22, 96, and 100 is less than the force required to hold the spring-loaded lift valve 54 of all check valves 46, 50, and 52 on its seat 108. This setup of adapter unit 16 is achieved by further regulating the pressure inside the three supply lines 22, 96, and 100 connected to adapter unit 16. Rock anchor 68 can be inserted using the same cantilever 80 of the underground rock drill 10 as when drilling hole 72, or by another second cantilever 80' of the underground rock drill 10. When rock anchor 68 is fully inserted into hole 72, the mixture of two resin chemicals cures.

[0066] In the fourth method step 130, the retaining plate 132 is attached to the portion of the installed rock anchor 68 protruding from the hole 72 (see...). Figure 8eThe retaining plate 132 can be secured by a nut 134 screwed onto the rock anchor 68. The retaining plate 132 can be used to install a net or wire mesh (not shown) onto the rock surface 74. The installation process of the rock anchor takes an average of less than five minutes, preferably about three minutes.

[0067] Figure Labels

[0068] 10 underground rock drilling rigs

[0069] 12 rock drills

[0070] 14 Rinse Head

[0071] 16 adapter units

[0072] 18 manifolds

[0073] 20 flushing ports

[0074] 22 supply pipelines

[0075] 24 connection units

[0076] 26 Banjo bolts

[0077] 28 mounting components

[0078] 30 supply ports

[0079] 32 supply ports

[0080] 34 supply ports

[0081] 36 connecting pipelines

[0082] 38 emission outlets

[0083] 40 bolt head

[0084] 42 outflow direction

[0085] 44 Inflow direction

[0086] 46 Check Valve

[0087] 48 Supply Direction

[0088] 50 check valve

[0089] 52 Check Valve

[0090] 54 lift valve

[0091] 56 flow tubes

[0092] 58 Resin Injection System

[0093] 60 Resin Injection Device

[0094] 62 Drilling Tools

[0095] 64 Flushing Channel

[0096] 66 indicator holes

[0097] 68 Rock Anchors

[0098] 70 Methods and Steps

[0099] 72 holes

[0100] 74 Rock Surface

[0101] 76 Methods and Steps

[0102] 78 Methods and Steps

[0103] 80 cantilever

[0104] 82 fluid chamber

[0105] 84 supply channels

[0106] 86 ceiling

[0107] 88 drill pipe

[0108] 90 Middleware

[0109] 92 entrance

[0110] 94 Exports

[0111] 96 supply pipeline

[0112] 98 supply channels

[0113] 100 supply pipeline

[0114] 102 Supply Channel

[0115] 104 emission channel

[0116] 106 plug element

[0117] 108 valve seat

[0118] 110 thread

[0119] 112 thread

[0120] 114 side view

[0121] 116 side view

[0122] 118 flow channels

[0123] 120 Inlet Hole

[0124] 122 end region

[0125] 124 mounting components

[0126] 126 opening

[0127] 128 mounting holes

[0128] 130 Methods and Steps

[0129] 132 retaining plate

[0130] 134 nuts.

Claims

1. A resin injection device (60) for use with an underground rock drilling rig (10), such as a roof bolt drilling rig, a cable drilling rig, or a rock drilling rig, said resin injection device (60) having at least one rock drill (12) with a flushing head (14), characterized in that, The adapter unit (16) is implemented as a flushing fluid and resin manifold (18), which is configured to be directly inserted between the flushing port (20) of the (original) flushing head (14) and the flushing fluid supply line (22) of the underground rock drill (10).

2. The resin injection device (60) according to claim 1, characterized in that, The adapter unit (16) is configured to be fixedly attached to the flushing head (14).

3. The resin injection device (60) according to claim 2, comprising at least one connecting unit (24), such as a bolt or screw or a fluid line (hose), for establishing a fixed connection with the flushing head (14).

4. The resin injection device (60) according to claim 3, characterized in that, The connecting unit (24) is implemented as a Banjo bolt (26).

5. The resin injection device (60) according to claim 3, characterized in that, The connecting unit (24) is implemented as a hydraulic connector.

6. The resin injection device (60) according to any one of claims 3 to 5, characterized in that, The connecting unit (24) is configured to guide the resin flow and rinsing fluid flow from the adapter unit (16) to the (original) rinsing head (14).

7. The resin injection device (60) according to any one of claims 3 to 6, characterized in that, The connection unit (24) includes a mounting element (28), such as a thread, which is substantially the same as the standardized mounting element (124) of the flushing fluid supply line (22) of the underground rock drilling rig (10).

8. The resin injection device (60) according to any one of claims 2 to 7, characterized in that, The adapter unit (16) is configured to be laterally attached to the flushing head (14).

9. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) does not come into contact with any other part of the rock drill (12) except for the flushing head (14).

10. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) includes a first supply port (30) for the flushing fluid and a second supply port (32) for the resin chemicals.

11. The resin injection device (60) according to claim 10, characterized in that, The adapter unit (16) also includes a third supply port (34) for a second resin chemical, which is particularly different from the first resin chemical.

12. The resin injection device (60) according to claim 10 or 11, characterized in that, The adapter unit (16) includes a connecting line (36) which is fluidly connected to at least the first supply port (30) and the second supply port (32), and particularly to the third supply port (34).

13. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) includes, in particular, a single discharge port (38).

14. The resin injection apparatus (60) according to any one of claims 3 to 7 and according to claim 13, characterized in that, The discharge port (38) also forms a mounting hole for the connection unit (24), such as the Banjo bolt (26).

15. The resin injection device (60) according to any one of the preceding claims, characterized in that, The outflow direction (42) of the fluid, particularly liquid, preferably mixed resin chemicals, from the adapter unit (16) is at least substantially perpendicular to the inflow direction (44) of the fluid, particularly liquid, preferably unmixed resin chemicals, into the adapter unit (16).

16. The resin injection device (60) according to any one of the preceding claims includes at least one check valve (46, 50, 52) configured to prevent liquid, particularly resin chemicals, from flowing back in the direction of supply (48).

17. The resin injection device (60) according to claim 10 or 11 and claim 16, characterized in that, A first check valve (46) is installed at the first supply port (30), a second check valve (50) is installed at the second supply port (32), and preferably a third check valve (52) is installed at the third supply port (34).

18. The resin injection device (60) according to claim 16 or 17, characterized in that, The check valves (46, 50, 52) include, preferably, spring-loaded disc-shaped lift valves (54) for implementing the check mechanism.

19. The resin injection apparatus according to claim 18, characterized in that, The lift valve (54) is arranged outside the flow pipe (56) of the check valve (46, 50, 52).

20. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) is implemented as a single piece, particularly an integral component.

21. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) is made of corrosion-resistant material.

22. The resin injection device (60) according to any one of the preceding claims, characterized in that, The adapter unit (16) can be installed at the underground rock drilling rig (10) while maintaining the original drill string length.

23. A resin injection system (58) having a resin injection device (60) according to any one of the preceding claims and the flushing head (14).

24. The resin injection system (58) according to claim 23 further includes the rock drill (12) having the flushing head (14) and the drill bit (62) having at least one integrated flushing channel (64).

25. The resin injection system (58) according to claim 23 or 24, characterized in that, The flushing head (14) includes at least one indicator hole (66) configured to indicate the presence of a fault condition, particularly a blockage condition and / or a leakage condition.

26. An underground rock drilling rig (10), particularly a roof bolt drilling rig, cable drilling rig or rock drilling jumbo, comprising a resin injection system (58) according to any one of claims 23 to 25.

27. Use of the resin injection system (58) according to any one of claims 23 to 25 and / or the underground rock drilling rig (10) according to claim 26 for resin grouting installation of all-material rock anchors (68), which are particularly different from self-drilling anchors.

28. A resin injection method for an underground drilling rig (10), such as a roof bolt drilling rig, a cable drilling rig, or a rock drilling rig, utilizing a rock drill (12) with a flushing head (14), particularly via a resin injection device (60) according to any one of claims 1 to 22, characterized in that, The adapter unit (16) is implemented as a flushing fluid and resin manifold (18), which is directly inserted between the flushing port (20) of the flushing head (14) and the flushing fluid supply line (22) of the underground rock drilling rig (10), and is preferably fixedly attached to the flushing head (14).

29. An installation method for installing rock anchors (68), particularly via a resin injection device (60) according to any one of claims 1 to 22, wherein, In the first method step (70), a hole (72) is drilled into the rock surface (74) by a rock drill (12) under conditions of continuous or intermittent flushing of the hole (72) using flushing fluid flowing through the flushing channel (64) and to the outlet (94) at the tip of the drill bit (62), the rock drill (12) comprising a drill bit (62) having at least one integrated flushing channel (64), wherein, in the second method step (76), the hole (72) is filled with a resin mixture introduced into the hole (72) from the outlet (94) at the tip of the drill bit (62) via the flushing channel (64), and wherein, in the third method step (78), the rock anchor (68) is inserted into the resin-filled hole (72).

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