Swivel head, anchor rod striking unit and method

Abstract

A repositioning head, a rock bolting head and a method of providing a rock bolting anchor for a rock surface are disclosed. The repositioning head (16) is mounted to a front end of a drill feed beam (10) of a drilling unit (5) of a rock bolting head (4). The repositioning head comprises a repositioning element (34) provided with a drill rod clamping tool (36) and a resin feeding tool (29). The repositioning element is movable to selectively reposition the drill rod clamping tool and the resin feeding tool on a drilling line (28).

Description

Technical Field

[0001] This invention relates to an indexing head for a drilling unit in a rock anchor bolt head, and is intended for use when reinforcing rock surfaces.

[0002] The present invention also relates to an anchor bolt unit and method.

[0003] The scope of the invention is more specifically defined in the preamble of the independent claims. Background Technology

[0004] In mines, construction sites, and other work areas, it is necessary to reinforce rock surfaces to ensure the safety and suitability of these areas for their intended purpose. A common method for rock reinforcement is rock bolting. In this reinforcement system, several rock bolts are inserted into drilled holes and tensioned. This binds the rock strata together, reducing the risk of collapse. Resin material can be fed into the drilled holes before inserting and tensioning the rock bolts to further enhance the reinforcement. Typically, rock bolting is performed using a bolting machine, which includes a bolting head for drilling holes and feeding the rock bolts into them. The bolting head includes a rotation device for moving the drilling unit, the bolting unit, and the resin feeding device to align with the drill hole, allowing the desired reinforcement process to be performed. However, existing bolting heads have shown some drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide a novel and improved indexing head, anchor bolt machine, and method for rock reinforcement.

[0006] The indexing head according to the invention is characterized by the features of the feature portion of the first independent device claim.

[0007] The bolting machine according to the invention is characterized by the features of the feature portion of the second independent device claim.

[0008] The method according to the invention is characterized by the features and steps of the feature portion of the independent method claim.

[0009] One concept of the disclosed solution is that the drilling unit for rock anchor bolt heads includes an indexing head capable of performing dual operations (i.e., manipulating the drill rod and feeding resin). The indexing head is located at the front end of the drill feed beam of the drilling unit and includes a drill rod clamping tool for manipulating the drill rod via a first clamping surface and a second clamping surface. When manipulating the drill rod, the second clamping surface can be moved toward the first clamping surface via a clamping actuator. A resin feeding tool is also present for feeding resin material into the borehole drilled by the drilling unit. The indexing head also includes an indexing element movable relative to the body of the indexing head via at least one indexing actuator. The first clamping surface of the drill rod clamping tool and the resin feeding tool are both mounted to the indexing element and are movable together and simultaneously relative to the body. Thus, when the indexing actuator is actuated, the first clamping surface and the resin feeding tool can be selectively indexed to a predetermined operating position.

[0010] In other words, the indexing head has two tool configurations: a drill pipe clamping tool and a resin feed tool, which can be indexed one at a time from their resting position to a common operating position. When the common indexing element is moved, both the first clamping surface and the resin feed tool move simultaneously.

[0011] When the indexing head is mounted on the drill feed beam, the operating position is located on the drill line of the drilling unit. Therefore, in this paper, the operating position actually means the drill line. Of course, the drill line is aligned with the drilled hole.

[0012] One advantage of the disclosed solution is that the movement of the drill pipe clamping tool and the resin feed tool is easy and requires very little space. Furthermore, the movement length can be short and precise. Since the indexing movement occurs only in the indexing head, the drill feed beam can remain immovable during indexing. Therefore, the drill line of the drilling unit is always aligned with the borehole during drilling and resin feeding.

[0013] According to an embodiment, the indexing head is a separate, independent device or unit that can be installed onto the drill feed beam. The indexing head can then be removed and replaced as needed, and it can also be retrofitted to an existing drill feed beam.

[0014] According to an alternative embodiment, the indexing head is configured as an inseparable part of the drill feed beam.

[0015] According to an embodiment, the second clamping surface of the drill pipe clamping tool is located in the operating position and is movable toward the first clamping surface that has been rotated to the operating position. Then, the second clamping surface only requires a relatively short movement length.

[0016] According to an embodiment, the first clamping surface is a first jaw that is fixedly mounted relative to the indexing element. The second clamping surface is a second jaw and is coupled to a clamping actuator located in the operating position. The clamping actuator can move the second jaw toward the first jaw that has been indexed to the operating position. Thus, the first jaw is positioned opposite the second jaw.

[0017] In other words, when the clamping actuator is operated, the second jaw can move toward the first jaw, allowing it to clamp onto the drill pipe located on the drilling line (i.e., in the operating position). This prevents movement of the drill pipe and allows the screw-type coupling located between the extended drill pipes to be opened and engaged. Therefore, the drill pipe clamping tool has clamping capability and controllable clamping characteristics.

[0018] According to an embodiment, the first jaw is first moved to the operating position by an indexing actuator, and only after this position does the second jaw move toward the first jaw by a clamping actuator. Depending on the length of movement of the second jaw, the jaws can be used together as a guide or a clamping device for the drill pipe. Therefore, by controlling the clamping actuator, it is possible to select whether the drill pipe clamping device operates as a guide or as a clamp.

[0019] According to an embodiment, the drill pipe clamping tool has two operating features: a clamping feature and a guiding feature, wherein these operating features are selectable in response to the magnitude of a movement length of the second clamping surface toward the first clamping surface in the operating position. A clamping actuator is configured to move the second clamping surface a longer distance to press the drill pipe in the operating position against the first clamping surface via the second clamping surface, thereby providing the clamping feature, and is configured to move the second clamping surface a shorter distance to provide the guiding feature.

[0020] In the guiding feature, the first and second jaws are controlled to be positioned at a short distance from the outer surface of the drill pipe located on the drill line. Thus, the jaws do not physically contact the drill pipe and do not prevent rotation and longitudinal movement of the drill pipe relative to the indexing head. However, in the event that the drill pipe moves to the side for some reason, the jaws positioned closer to the drill pipe can provide guidance for the drill pipe during the drilling phase. Therefore, the drill pipe clamping tool has guiding capability and controllable guiding features.

[0021] According to an embodiment, the selection between the clamping feature and the guiding feature can be accomplished by controlling the force of the jaws contacting the outer surface of the drill pipe. Therefore, the operating feature of the drill pipe clamping tool can be selected in response to the magnitude of the force applied by the second clamping surface toward the first clamping surface in the operating position. Thus, the clamping actuator can move the second clamping surface with a larger force to press against the drill pipe, thereby pressing the drill pipe against the first clamping surface to provide the clamping feature. When the movement of the second clamping surface is accomplished with a smaller force, the guiding feature is provided.

[0022] In this embodiment, a guiding feature is provided by using only a limited force to press the jaws against the drill pipe, so that the drill pipe remains movable and drilling can be performed under good guidance.

[0023] According to an embodiment, the first and second jaws can be replaceable jaw elements made of a wear-resistant material (e.g., hardened steel). Both jaws include a contact surface with a curved shape corresponding to the outer surface shape of the drill pipe. Therefore, the jaws may include a semi-circular contact surface.

[0024] According to one embodiment, the clamping actuator is a hydraulic cylinder, and the second clamping surface is mounted to the free end of the piston rod of the hydraulic cylinder. Furthermore, the piston rod is oriented toward the operating position, whereby the piston rod can perform linear movement toward and from the operating position to move the second clamping surface to a clamping position and a guide position in response to the length of movement of the piston rod. Alternatively, the clamping feature and the guide feature are selected by the force generated by the clamping actuator.

[0025] According to an embodiment, the clamping actuator is a hydraulic cylinder, and it is mounted in a non-movable manner relative to the body of the rotary head. Therefore, depending on the operation of the clamping actuator, only the piston rod of the cylinder moves. Thus, the disclosed solution can have a simple and durable structure.

[0026] According to alternative embodiments, in some applications, the clamping actuator may also be mounted on the moving part, thereby being movable relative to the body of the indexing head.

[0027] According to an embodiment, alternatively, the clamping actuator is a hydraulic motor or an electric motor configured to move the second jaws via a suitable transmission element. Furthermore, in some solutions, the clamping actuator may also be an electric linear actuator.

[0028] According to an embodiment, the resin feeding tool includes a feed tube. In other words, when the resin feeding tool is positioned on the drill line (i.e., positioned at the operating position of the indexing head), resin material can be fed into the borehole through the central channel of the feed tube.

[0029] According to an embodiment, a resin feeding tool is configured to feed a resin cartridge into a borehole. The resin cartridge is filled with one or more resin materials or resin material components and is covered with a coating material. The cartridge can be injected into the borehole, for example, by a pneumatic fluid flow.

[0030] Because the tip of the feed tube will be positioned close to the opening of the drilled hole, there is no risk of the resin cartridge hitting the edge of the borehole and being crushed before it is inserted into the borehole. This ensures proper feeding of the resin material.

[0031] According to an embodiment, a resin feeding tool is configured to feed bulk resin material into a borehole. Thus, a feed pipe can be connected to a supply hose or supply line through which bulk resin material or resin material components can be supplied to the resin feeding tool.

[0032] According to an embodiment, the feed tube may be made of a rigid material (e.g., steel).

[0033] According to an embodiment, the resin tube can be a replaceable component that can be replaced when worn or damaged.

[0034] According to one embodiment, the feed tube includes a first straight section parallel to the drill line and a second inclined section oriented at an angle relative to the first section. The distal end of the second inclined section can be connected to a feed hose or a corresponding resin material supply line. The angled orientation of the second section provides more space and facilitates the feeding of resin material to the indexing head.

[0035] According to an embodiment, the resin feeding tool may include an actuator or feeding device for moving the front end of the feed tube closer to the opening of the borehole. The entire feed tube can then be moved axially, or alternatively, the feed tube may include an extendable structure actuated by the actuator. The advantage of this embodiment is that it further ensures the feeding of resin material into the borehole.

[0036] According to an embodiment, the feed tube can be partially inserted into the borehole through the aforementioned actuator to reach the desired point within the borehole for feeding resin material, or the feed tube can be inserted all the way to the bottom of the borehole.

[0037] According to an embodiment, the indexing actuator is a hydraulic cylinder. The advantage of using a hydraulic cylinder to move the indexing element is that it is a reliable and inexpensive actuator.

[0038] According to an embodiment, the indexing element is rotatable. Thus, the indexing element, together with the drill pipe clamping tool and the resin feed tool, can rotate relative to the main body to simultaneously index the drill pipe clamping tool and the resin feed tool via rotational movement generated by the indexing actuator. The advantage of this solution is that the rotation mechanism can be designed to be compact, and the indexing movement can be relatively short. Therefore, the operation of the indexing head can be reliable. The structure is also relatively simple and easy to manufacture.

[0039] According to one embodiment, the indexing element is a cam, which is arranged to rotate about a pivot and relative to the body via an indexing actuator. The cam can be rotated by a hydraulic cylinder serving as the indexing actuator. Alternatively, the cam can be rotated by a hydraulic motor or any other suitable hydraulic or electrically operable actuator.

[0040] According to an embodiment, the indexing element, together with the drill pipe clamping tool and the resin feeding tool, is arranged to be linearly movable relative to the body, thereby enabling the drill pipe clamping tool and the resin feeding tool to be indexed by the linear movement generated by the indexing actuator.

[0041] According to an embodiment, the linearly movable indexing element can be a plate, a slider, or a structure provided with a drill rod clamping tool and a resin feeding tool and movable along a guide surface arranged on the body.

[0042] According to an embodiment, the indexing element includes a thrust surface for pushing the drill pipe laterally away from the operating position in response to an indexing movement that moves the resin feed tool to the operating position. In other words, the thrust surface is configured to apply the indexing movement to the distal portion of the drill pipe located on the drill line. Thus, the drill pipe does not need to be pulled back on the drill feed beam; instead, the front end portion of the drill pipe can bend laterally, providing sufficient space for moving the resin feed tool to the operating position. This end of the drill pipe makes way for the resin feed tool. The advantage of this drill pipe bending feature is that the resin feed tool can be quickly placed into the operating position without moving the drilling unit or rock drill. Another advantage is that no separate actuator or pushing device is required, as the thrust surface is arranged to move together with the resin feed tool and utilizes the same indexing actuator.

[0043] According to an embodiment, the disclosed solution also relates to an anchor head for providing reinforced rock anchors to rock surfaces. The anchor head includes: a frame for supporting the anchor head and mountable to a boom of an anchor drilling machine; at least one drilling unit for drilling a borehole and including a drill feed beam and a rock drilling machine movable on the drill feed beam; at least one anchor bolt unit including an anchor bolt feed beam and an anchor bolt feeding device for inserting the rock anchor into the borehole and movable on the anchor bolt feed beam; a resin feeding device for feeding resin material into the drilled borehole; a device for manipulating a drill rod mountable to the rock drilling machine; and an indexing device for moving the drilling unit and the anchor bolt unit relative to the frame and for selectively aligning the drilling unit and the anchor bolt unit with the borehole. The anchor bolt head also includes an indexing head mounted at the distal end of the drill feed beam. The indexing head is an indexing head according to the features and embodiments disclosed herein, and includes a drill pipe clamping tool and a resin feed tool, both of which are mounted to the indexing element and configured to be selectively indexed to the drill line by at least one indexing actuator.

[0044] The advantage of the disclosed anchor bolt head configuration is that it eliminates the need to move the drilling unit between the drilling and resin feeding mechanisms. Furthermore, when the indexing head has three functions—drill rod guidance, drill rod clamping, and resin feeding—the overall structure of the anchor bolt head can be used more simply, compactly, reliably, and effectively.

[0045] According to an embodiment, the rock bolt head is intended for use in driving rock bolts and performing extended rock drilling in low-lying rock tunnels. Therefore, a drill rod manipulation tool is needed for manipulating the extended drill rod.

[0046] According to an embodiment, the disclosed solution also relates to a method for providing reinforced rock anchors to a rock surface. The method includes: performing a drilling phase, comprising drilling the rock surface using a drilling unit of an anchor head mounted to a rock anchoring machine; performing a resin feeding phase, comprising feeding resin material into the drilled hole using a resin feeding tool; performing a rock anchor insertion phase, comprising inserting the rock anchor into the drill hole using the anchor unit of the anchor head; maintaining the drill feed beam of the drilling unit on the drill line during the duration of the drilling phase and the resin feeding phase; and wherein the drilling phase is performed as extended drilling and includes manipulating a drill rod on the drill line using a drill rod clamping tool. The method further includes: implementing a movable indexing element comprising at least one clamping surface of the drill pipe clamping tool and the resin feed tool; moving the indexing element, the clamping surface, and the resin feed tool together via a common indexing actuator; and selecting which of the clamping surface and the resin feed tool is positioned on the drill line by means of the magnitude of the movement length of the indexing element.

[0047] According to an embodiment, the method further includes: providing a first clamping surface for the indexing element, and moving a second clamping surface toward the first clamping surface by a clamping actuator when the first clamping surface is indexed on the drill line; clamping the drill rod on the drill line by pressing the second clamping surface against the outer surface of the drill rod, thereby forcing the drill rod to abut against the first clamping surface provided on the indexing element; and selectively providing lateral guidance to the drill rod located on the drill line by positioning the second clamping surface at a distance from the outer surface of the drill rod, thereby positioning the drill rod between the first clamping surface and the second clamping surface without physical contact.

[0048] The disclosed embodiments described above can be combined to form a suitable solution having the desired features described above. Attached Figure Description

[0049] Some embodiments are described in more detail in the accompanying drawings, in which: Figure 1It is a schematic side view of a rock bolting machine equipped with a boom and bolt heads; Figure 2 This is a schematic diagram illustrating the processes related to rock reinforcement; Figure 3 This is a schematic side view of the anchor bolt head; Figure 4 yes Figure 3 A schematic top view of the anchor bolt head disclosed in the document; Figure 5 This is a schematic diagram of the drilling unit for drilling anchor bolt heads; Figure 6 and Figure 7 This is a schematic diagram showing a rotary head equipped with a rotatable rotary element; and Figure 8 and Figure 9 This is a schematic diagram showing a rotary head equipped with a linearly movable rotary element.

[0050] For clarity, the accompanying drawings illustrate some embodiments of the disclosed solution in a simplified manner. In the drawings, the same reference numerals denote the same elements. Detailed Implementation

[0051] Figure 1 A rock bolt driving machine 1 is disclosed, comprising a movable carrier 2 and at least one boom 3 mounted on the carrier 2. A rock bolt head 4 is mounted on the boom 3. The rock bolt head 4 includes a drilling unit 5 for drilling a borehole 6 and a rock bolt driving unit 7 for inserting a rock bolt 8 into the borehole 6. The drilling unit 5 and the rock bolt driving unit 7 are arranged to the rock bolt head 4 such that they can be rotated. First, the borehole 6 is drilled by the drilling unit 5, which includes a rock drill 9 movable on a drill feed beam 10 and equipped with a drill rod 11. When drilling is complete, resin material can be fed from a resin feed device 12 to the borehole 6 via a resin feed hose 13 or a conduit. After the resin feeding stage, the rock bolt head 4 is rotated, and the rock bolt driving unit 7 is moved to align with the borehole 6 so that the rock bolt 8 can be inserted. The rock bolt driving unit 7 includes a rock bolt feed beam 14 and a rock bolt feeding device 15 movable on the rock bolt feed beam 14. The rock bolt feeding device can push the rock bolt 8 into the borehole 6 and can perform pre-tensioning by tightening the tensioning screw of the rock bolt 8. The operation and work cycle of the rock bolt driving machine 1 and its rock bolt driving unit 4 can be automatically controlled under the control of the control unit CU, or can be manually controlled or assisted by the control unit CU.

[0052] Figure 1It is also disclosed that an indexing head 16, with features disclosed herein, is present at the front end of the drill feed beam 10. The indexing head 16 includes a drill pipe clamping tool for manipulating the drill pipe 11 and a resin feeding tool configured to receive resin material from the resin feed hose 13. Thus, the indexing device 16 is a multifunctional device configured to facilitate drilling and resin feeding.

[0053] Figure 2 The disclosed rock surface reinforcement 17 includes a drilling stage 18 performed by the drilling unit 5. Drilling can be an extension drill 19, thus requiring not only guiding the drill rod 20 but also clamping the drill rod 21 when connecting and disconnecting it. The drilling unit 5 is also provided with means for performing a resin feeding stage 22, for feeding resin cartridges 23 or bulk resin 24 into the drilled borehole. When the drilling stage 18 and resin feeding stage 22 are completed, a rock anchor insertion stage 25 is performed by the anchor bolt unit 7, for performing rock anchor bolt feeding 26 and tensioning 27.

[0054] Figure 3 An anchor bolt head 4 is disclosed, comprising a drilling unit 5, an anchor bolt unit 7, and an indexing head 16 located at the front end of a drill feed beam 10. A drill line 28 passes through a rock drill 9 and the indexing head 16. The drill line 28 is also referred to as the operating position of the indexing head 16, and the same reference numerals are used herein. The indexing head 16 includes a resin feed tool 29, which is provided with a resin feed tube 30 for receiving feed material and further guiding it to the borehole on the drill axis. The drill rod clamping and guiding device of the indexing head 16 is located in… Figure 3 Not visible in the middle. There also exists an anchor magazine 31 that can store several rock anchor bolts 8. In Figure 3 In this configuration, compartment 31 is a rotary compartment, but it can alternatively be a linear compartment. Furthermore, extended drill pipe can be stored in compartment 31, or alternatively, there can be another compartment or arrangement for storing drill pipe.

[0055] Figure 4 The anchor bolt head 4 is disclosed to be equipped with a rotation device for rotating the drilling unit 5 and the anchor bolt unit 7 relative to the rotary joint 32 by T1, so that one of the drilling unit 5 and the anchor bolt unit 7 can be moved to align with the borehole.

[0056] Figure 5 The drilling unit 5 is shown from an additional perspective. A manipulator 47 or a manipulator arm may be provided for manipulating the drill rod 11 when performing extended drilling.

[0057] Figure 6 The indexing head 16 is shown in the clamping position. Figure 7 The indexing head 16 is shown in the resin feeding position.

[0058] The indexing head 16 includes a body 33 and an indexing element 34 movable relative to the body 33 via an indexing actuator 35. The indexing head 16 also includes a drill pipe clamping tool 36 for clamping and guiding the drill pipe 11. The drill pipe clamping tool 36 includes a first clamping surface 37 and a second clamping surface 38. The second clamping surface 38 is movable toward the first clamping surface 37 via a clamping actuator 39. The clamping actuator 39 is a hydraulic cylinder 40. The first clamping surface 37 is mounted to the indexing element 34, and the second clamping surface 38 is mounted to the piston rod 41 of the hydraulic cylinder 40. The clamping actuator 39 is fixedly mounted to the body 33 and is located at a predetermined operating position 28 or drill line.

[0059] The indexing element 34 is a cam element T2 that can be rotated about a pivot 42 via a hydraulic cylinder 43 that serves as an indexing actuator 35. In addition to a first clamping surface 37, which is part of a drill pipe clamping tool 36, the indexing element 34 also includes a resin feeding tool 29. The resin feeding tool 29 includes a feed tube 30, which in… Figure 6 The diagram shows the feed tube 30 in a rest position, not aligned with the operating position 28. Instead, the drill pipe clamping tool 36 is rotated to the operating position 28, with the second clamping surface 38 moving toward the drill pipe 11. Depending on the length of movement of the second clamping surface 38 or the magnitude of the force generated by the clamping actuator, the drill pipe clamping tool 36 can provide lateral guidance to the drill pipe 11 or clamp the drill pipe 11. The magnitude of the force generated by the clamping actuator can be managed by one or more sensors.

[0060] exist Figure 7 In this process, the hydraulic cylinder 43, which serves as the indexing actuator 35, has performed its stroke outward and has rotated the indexing element 34 counterclockwise about the pivot 42. Consequently, the first clamping surface 37 of the drill pipe clamping tool 36 and the resin feeding tool 29 move together and simultaneously relative to the body 33. Therefore, the first clamping surface 37 and the resin feeding tool 29 can be selectively indexed to the operating position 28 by the indexing actuator 35.

[0061] Stroke management of hydraulic cylinder 43 can be performed by reaching each extreme position of the hydraulic piston, or by utilizing adjustable specific stops, or by using sensors to monitor and identify the movement of the piston rod. Other possible control principles can also be implemented.

[0062] The indexing element 34 also includes a thrust surface 44 for pushing the drill rod 11 away from the operating position 28 when the resin feeding tool 29 is indexed to the operating position 28. Thus, the drill rod 11 bends due to the rotational movement of the indexing element 34.

[0063] Figure 7It is also shown that the first clamping surface 37 may include a first jaw 45, and the second clamping surface 38 may include a second jaw 46. Jaws 45 and 46 may be replaceable components, and their facing surfaces may be shaped to correspond to the outer surface of the drill pipe 11.

[0064] Figure 8 and Figure 9 A transpose head 16 is disclosed, which is related to Figure 6 and Figure 7 The difference between the disclosed solution and the one in the present paper lies in the linear movement L of the indexing element 34. The operating principle is the same as... Figure 6 and Figure 7 The same applies. The indexing actuator 35, acting as a hydraulic cylinder 43, is connected to the indexing element 34 and can perform vertical movement to provide indexing for the drill pipe manipulator 36 and the resin feed tool 29. The indexing element 34 can be a slider provided with a first jaw 45 and a feed tube 30. The clamping actuator 39 can be oriented perpendicular to the linear movement direction L of the indexing element 34 and is arranged to move the second jaw 46.

[0065] exist Figure 9 In this position, hydraulic cylinder 43 retracts and indexing element 34 moves downward. The thrust surface 44 of indexing element 34 pushes drill rod 11 away from operating position 28, allowing resin feed tube 30 to replace it. Body 33 may include guide surfaces or elements for guiding the linear movement L of indexing element 34.

[0066] As can be seen, this linear movement scheme also utilizes a simple and compact structure. Furthermore, the movements of the indexing actuator 35 and the clamping actuator 39 can be short and easily controlled.

[0067] The accompanying drawings and related descriptions are intended only to illustrate the concept of the invention. The invention may vary within the scope of the claims in its details.

Claims

1. An indexing head (16) for a drilling unit (5) in a rock bolting head (4) of a rock bolting machine (1), the rock bolting machine (1) being configured to perform extended drilling (19) including manipulation of a drill rod (11), wherein the indexing head (16) comprises: The main body (33) can be installed at the front end of the drill feed beam (10) of the drilling unit (5); A drill rod clamping tool (36) is used to manipulate the drill rod (11) of a rock drill (9) that can be connected to the drilling unit (5), and includes a first clamping surface (37) and a second clamping surface (38), wherein the second clamping surface (38) is movable toward the first clamping surface (37) by a clamping actuator (39); as well as A resin feeding tool (29) is used to feed resin material into a drill hole (6) drilled by the drilling unit (5). in The indexing head (16) also includes an indexing element (34) that is movable relative to the body (33) by at least one indexing actuator (35); The first clamping surface (37) of the drill pipe clamping tool (36) and the resin feeding tool (29) are mounted to the indexing element (34) and are capable of moving together and simultaneously relative to the body (33), thereby allowing the first clamping surface (37) and the resin feeding tool (29) to be selectively indexed to the drill line (28) by the indexing actuator (35); and The second clamping surface (38) is located at the drill line (28) and is movable toward the first clamping surface (37) that is rotated to the drill line (28).

2. The indexing head according to claim 1, characterized in that, The first clamping surface (37) is a first jaw (45) mounted in a non-movable manner relative to the indexing element (34); The second clamping surface (38) is a second jaw (46) connected to the clamping actuator (39) located at the drill line (28); Furthermore, the clamping actuator (39) is configured to move the second jaw (46) toward the first jaw (45) which is rotated to the drill line (28) and thus opposite to the second jaw (46).

3. The indexing head according to claim 1 or 2, characterized in that, The drill pipe clamping tool (36) has two operating features: a clamping feature and a guiding feature, wherein the operating features can be selected in response to the magnitude of the movement length of the second clamping surface (38) toward the first clamping surface (37) at the drill line (28); The clamping actuator (39) is configured to move the second clamping surface (38) a longer distance so as to press the drill rod (11) located at the drill line (28) against the first clamping surface (37) via the second clamping surface (38), thereby providing the clamping feature, and the clamping actuator (39) is configured to move the second clamping surface (38) a shorter distance, thereby providing the guiding feature.

4. The indexing head according to claim 1 or 2, characterized in that, The drill pipe clamping tool (36) has two operating features: a clamping feature and a guiding feature, wherein the operating features can be selected in response to the magnitude of the force applied by the second clamping surface (38) toward the first clamping surface (37) located at the drill line (28); The clamping actuator (39) is configured to move the second clamping surface (38) with a larger force to press the drill rod (11) located at the drill line (28) against the first clamping surface (37) via the second clamping surface (38), thereby providing the clamping feature, and the clamping actuator (39) is configured to move the second clamping surface (38) with a smaller force, thereby providing the guiding feature.

5. The indexing head according to any one of claims 1-4, characterized in that, The clamping actuator (39) is a hydraulic cylinder (40); The second clamping surface (38) is mounted to the free end of the piston rod (41) of the hydraulic cylinder (40); The piston rod (41) is oriented toward the drill line (28), thereby being configured to perform linear movement toward and from the drill line (28) to move the second clamping surface (38) to the clamping position and the guide position in response to the length of movement of the piston rod (41) or the force generated by the clamping actuator (39).

6. The indexing head according to claim 5, characterized in that, The hydraulic cylinder (40) used as the clamping actuator (39) is mounted in a non-movable manner relative to the body (33) of the indexing head (16), and only the piston rod (41) is movable.

7. The indexing head according to any one of claims 1-6, characterized in that, The resin feeding tool (29) includes a feeding tube (30).

8. The indexing head according to any one of claims 1-7, characterized in that, The indexing actuator (35) configured to move the indexing element (34) is a hydraulic cylinder (43).

9. The indexing head according to any one of claims 1-8, characterized in that, The indexing element (34) is arranged together with the drill pipe clamping tool (36) and the resin feeding tool (29) to be rotatable (T2) relative to the body (33), whereby the drill pipe clamping tool (36) and the resin feeding tool (29) can be indexed by rotational movement generated by the indexing actuator (35).

10. The indexing head according to claim 9, characterized in that, The indexing element (34) is a cam, which is arranged to rotate (T2) about a pivot (42) and relative to the body (33) via the indexing actuator (35).

11. The indexing head according to any one of claims 1-8, characterized in that, The indexing element (34) is arranged together with the drill pipe clamping tool (36) and the resin feeding tool (29) to be linearly movable relative to the body (33), whereby the drill pipe clamping tool (36) and the resin feeding tool (29) can be indexed by linear movement (L) generated by the indexing actuator (35).

12. The indexing head according to any one of claims 1-11, characterized in that, The indexing element (34) includes a thrust surface (44) configured to push the drill rod (11) aside from the drill line (28) in response to an indexing movement that moves the resin feed tool (29) to the drill line (28).

13. An anchor head (4) for providing a reinforced rock anchor (8) for a rock surface, The anchor bolt head (4) mentioned above includes: A frame for supporting the bolt head (4) and capable of being mounted to the boom (3) of the bolt driving machine (1); At least one drilling unit (5) for drilling a borehole (6) and including a drill feed beam (10) and a rock drill (9) movable on the drill feed beam (10); At least one rock bolt unit (7) includes a rock bolt feed beam (14) and a rock bolt feeding device (15), the rock bolt feeding device (15) being used to insert the rock bolt (8) into the borehole (6) and being movable on the rock bolt feed beam (14); A resin feeding device for feeding resin material into the drilled hole (6); Device for manipulating the drill rod (11) that can be mounted to the rock drill (9); as well as A rotation device for moving the drilling unit (5) and the anchor bolt unit (7) relative to the frame, and for selectively aligning the drilling unit (5) and the anchor bolt unit (7) with the borehole (6). Its features are, The anchor bolt head (4) also includes an indexing head (16), which is installed at the far front end of the drilling feed beam (10); And the indexing head (16) is an indexing head according to any one of claims 1-12, and includes a drill pipe clamping tool (36) and a resin feeding tool (29), both of which are mounted to the indexing element (34) and configured to be selectively indexed to the drill line (28) by at least one indexing actuator (35).

14. A method for providing reinforced rock anchors (8) for rock surfaces, The method includes: The drilling phase (18) includes drilling a hole (6) on the rock surface by means of the drilling unit (5) of the anchor head (4) installed on the rock anchoring machine (1); Performing the resin feeding stage (22) includes feeding resin material into the drilled hole (6) using a resin feeding tool (29); Perform the rock anchor insertion stage (25), which includes inserting the rock anchor (8) into the borehole (6) through the anchor unit (7) of the anchor head (4); During the duration of the drilling phase (18) and the resin feeding phase (22), the drill feed beam (10) of the drilling unit (5) is kept on the drill line (28). The drilling phase (18) is performed as an extension drilling (19) and includes manipulating a drill rod (11) on the drill line (28) by means of a drill rod clamping tool (36); and the method further includes: A movable indexing element (34) is implemented, the movable indexing element (34) including at least one clamping surface (37) of the drill pipe clamping tool (36) and the resin feeding tool (29); The indexing element (34), the clamping surface (37), and the resin feeding tool (29) are all moved together by a common indexing actuator (35); And the size of the moving length of the indexing element (35) is used to select which of the clamping surface (37) and the resin feeding tool (29) is positioned on the drill line (28); Its features are, Includes: providing a first clamping surface (37) for the indexing element (34), and when the first clamping surface (37) is indexed onto the drill line (28), moving the second clamping surface (38) toward the first clamping surface (37) by a clamping actuator (39); The drill rod (11) is clamped onto the drill line (28) by pressing the second clamping surface (38) against the outer surface of the drill rod (11), thereby forcing the drill rod (11) against the first clamping surface (37) provided on the indexing element (34); and By positioning the second clamping surface (38) at a distance from the outer surface of the drill rod (11), the drill rod (11) on the drill line (28) is selectively provided with lateral guidance, whereby the drill rod (11) is located between the first clamping surface (37) and the second clamping surface (38) without physical contact.

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