Rock bolt installation device and rock bolt installation method

Abstract

To provide a rock bolt driving device capable of driving a rock bolt even if a total length of the rock bolt driving device is almost the same as that of the rock bolt to be driven.SOLUTION: A rock bolt driving device 200 is arranged so as to align a magazine 6 and a guide shell 2 in parallel in a longitudinal direction in a state both are overlapped in a projected view from a side direction, and the guide shell 2 and the magazine 6 are connected on a tip of a boom 17 through a rotational mechanism. A rear bolt clamp 5 as a subsidiary driving part is attached on a driving machine body 14 on the guide shell 2. The rear bolt clamp 5 allows a rock bolt B to be held on a driving axis from its side direction in a subsidiary driving posture positioned at the driving axis by the drive of the rotational mechanism, and further, is configured to allow the rock bolt B to be driven along a bored hole in a middle part of a tip side of the rock bolt B through being fed forward together with the driving machine body 14 while holding the rock bolt B.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rock bolt driving device and a rock bolt driving method for driving rock bolts in tunnel construction, mine tunnel excavation, and reinforcement soil work. [Background technology]

[0002] In tunnel construction, mine tunnel excavation, and reinforcement soil work, rock bolts are driven for the purpose of reinforcing tunnels, tunnel walls, cut earth, etc. (See, for example, Patent Document 1). When driving rock bolts, long rock bolts are sometimes used and driven deep into thick, soft ground layers to provide greater stabilization.

[0003] Typically, in a rock bolt driving device, a rock bolt is loaded into a driving machine such as a drifter, and the rear end of the rock bolt is driven along the drilled hole by the driving machine to drive the rock bolt. For this reason, conventionally, the total length of a rock bolt driving device is roughly the "rock bolt length + driving machine length [driving machine body + rod + hose reel (≒ 1.5m to 2m)]". For example, when driving a 6m rock bolt, a rock bolt driving device with a total length of about 8m is used. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-65536 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, in the bench cut method, in which the tunnel excavation cross section is divided into upper and lower halves and the upper half section is excavated in advance, the overall length of the rock bolt driving device needs to be designed to fit within the upper half section and not interfere with the bench.

[0006] However, the thicker the soft ground layer, the longer the rock bolts will be, and the longer the overall length of the rock bolt installation device will be. This can cause the rock bolt installation device to interfere with the bench, making construction difficult.

[0007] Therefore, the present invention has been made with attention to such problems, and has an objective of providing a rock bolt driving device that is capable of driving rock bolts even if the total length is approximately the same as the length of the rock bolt to be driven, and a method of driving rock bolts using the same. [Means for solving the problem]

[0008] In order to solve the above problems, a rock bolt driving device according to one aspect of the present invention is a rock bolt driving device that is mounted on the boom tip of a rock bolt driving cart and drives a rock bolt into a drilled hole, and includes a magazine in which the rock bolts are stored, a guide shell that is arranged in parallel along the longitudinal direction of the magazine and within a range that overlaps with the magazine when projected in a direction perpendicular to the longitudinal direction, a rotation mechanism that individually selects the magazine and the guide shell and rotates them relative to the tip of the boom, and a drive mechanism that is mounted on the guide shell and is provided so as to be feedable back and forth along the longitudinal direction of the guide shell and drives the rock bolts stored in the magazine into the rock bolts on a driving axis line along the drilled hole. the driving machine body being configured to rotate the guide shell to position it in a main driving position in which the axis of the driving machine body is positioned on the driving axis along the drill hole, and a secondary driving position in which the secondary driving section is positioned on the driving axis, and the secondary driving section has a bolt clamping mechanism capable of holding the rock bolt from its side on the driving axis in the secondary driving position, and is configured to be able to drive up to a midpoint of the tip of the rock bolt along the drill hole by holding the rock bolt with the bolt clamping mechanism and feeding it forward together with the driving machine body.

[0009] In addition, in order to solve the above-mentioned problems, a method of driving a rock bolt according to one embodiment of the present invention is a method of driving a rock bolt in two stages along a drilled hole using a rock bolt driving device according to one embodiment of the present invention, and is characterized in that it includes an advancement step in which, in a state in which the rock bolt is in the secondary driving position, the secondary driving part drives the rock bolt along the drilled hole while holding up to a midpoint of the tip side of the rock bolt from the side with the bolt clamp, and after the advancement step, in a state in which the main driving position is taken, the driving machine main body drives the remaining portion of the rock bolt along the drilled hole while pressing the rear end of the rock bolt.

[0010] According to a rock bolt driving device according to one aspect of the present invention, a guide shell is provided at the tip of a boom via a pivot mechanism, and the pivot mechanism can pivot the guide shell between a main driving position and a secondary driving position. A secondary driving section is attached to the driving machine body, and in the secondary driving position, the secondary driving section can drive the rock bolt up to the middle of the tip side along the drilled hole by holding the rock bolt on the driving axis from the side with a bolt clamp and feeding it forward together with the driving machine body.

[0011] In other words, according to the present invention, by providing a so-called two-stage concrete driving mechanism, in the secondary concrete driving position, the rock bolt and the driving machine body are not arranged in series as in the normal case, but are arranged in parallel in an overlapping state, and the rock bolt can be driven along the drill hole up to the middle of the tip side. Therefore, according to the present invention, an empty space can be secured behind the rock bolt whose tip side has been pushed into the drill hole up to the middle part. As a result, according to the present invention, the driving machine body can be rotated to the main casting position by the rotational movement of the pivoting mechanism, and then the driving machine body can be positioned in the empty space behind the rock bolt, and the remaining rear end portion of the rock bolt that has been cast partway can be cast along the drilled hole while pressing against the rear end of the rock bolt by the feed movement of the driving machine on the casting axis.

[0012] Furthermore, according to a method of driving a rock bolt according to one embodiment of the present invention, the driving of the rock bolt can be completed by a "two-stage progressive" method in which, using a rock bolt driving device according to one embodiment of the present invention, the driving device body is rotated on the driving axis in the main driving position into the empty space behind the rock bolt that was pushed axially forward in the first-stage forward feed step in the secondary driving position, and then further advanced axially in the second-stage backward feed step. Therefore, according to one aspect of the rock bolt driving method of the present invention, by pushing a single rock bolt into a drilled hole using a two-stage progressive driving process, construction can be performed using a rock bolt driving device having a total length approximately the same as the length of the rock bolt. Effect of the Invention

[0013] As described above, according to the present invention, even in construction using the bench cut method, rock bolts can be cast as long as there is space in the longitudinal direction approximately equal to the length of the rock bolt to be cast. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is an explanatory diagram of an embodiment of a rock bolt driving device according to one aspect of the present invention. [Diagram 2] FIG. 1 is an explanatory diagram showing a main part of one embodiment of a rock bolt driving device according to one aspect of the present invention in a separated state. [Diagram 3] FIG. 2 is an explanatory diagram of the construction procedure (step 1) using the rock bolt driving device of this embodiment. [Figure 4] FIG. 2 is an explanatory diagram of the construction procedure (step 2) using the rock bolt driving device of this embodiment. [Diagram 5] FIG. 2 is an explanatory diagram of the construction procedure (step 3) using the rock bolt driving device of this embodiment. [Figure 6] FIG. 4 is an explanatory diagram of the construction procedure (step 4) using the rock bolt driving device of this embodiment. [Figure 7] FIG. 4 is an explanatory diagram of the construction procedure (step 5) using the rock bolt driving device of this embodiment. [Figure 8]FIG. 11 is an explanatory diagram of the construction procedure (step 6) using the rock bolt driving device of this embodiment. [Figure 9] FIG. 11 is an explanatory diagram of the construction procedure (step 7) using the rock bolt driving device of this embodiment. [Figure 10] FIG. 11 is an explanatory diagram of the construction procedure (step 8) using the rock bolt driving device of this embodiment. [Figure 11] FIG. 11 is an explanatory diagram of the construction procedure (step 9) using the rock bolt driving device of this embodiment. [Figure 12] FIG. 2 is an explanatory diagram of the construction procedure (step 10) using the rock bolt driving device of this embodiment. [Figure 13] FIG. 2 is a comparative explanatory diagram between a conventional rock bolt driving device (a) and an embodiment of a rock bolt driving device according to one aspect of the present invention (b). [Figure 14] 1A and 1B are schematic diagrams showing the driving operation state of a rock bolt driving cart equipped with a rock bolt driving device according to one embodiment of the present invention and a rock bolt driving cart equipped with a conventional rock bolt driving machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the drawings are schematic. Therefore, it should be noted that the relationship and ratio between thickness and planar dimensions are different from the actual ones, and the drawings include parts where the relationship and ratio of dimensions are different from each other. Furthermore, the embodiments described below are merely examples of devices and methods for embodying the technical ideas of the present invention, and the technical ideas of the present invention do not limit the materials, shapes, structures, arrangements, etc. of the components to the embodiments described below.

[0016] As shown in Figures 1 and 2, the rock bolt driving device 200 of this embodiment has the magazine 6 and the guide shell 2 arranged in parallel so that they overlap in the longitudinal direction, and the total length L of the rock bolt driving device 200 is approximately the same as the length of the rock bolt B to be driven.

[0017] More specifically, in the rock bolt driving device 200 of this embodiment, a cylindrical support housing 17h is provided at the tip of a boom 17 of a rock bolt driving cart (see reference numeral 100 in FIG. 14). A rotating shaft 17j that is coaxially fitted into the support housing 17h is supported in parallel with the driving axis CL, and the base of the swing bracket 8 is provided on this rotating shaft 17j so as to be rotatable coaxially.

[0018] The swing bracket 8 is mounted with a guide shell 2 and an anchoring material injection device 15. The guide shell 2 is arranged in parallel along the longitudinal direction of the magazine 6 and within a range that overlaps with the magazine 6 when viewed in a projection perpendicular to the longitudinal direction. A hose reel 11 is mounted on the guide shell 2 near the rear end thereof, and a driving machine body 14 is mounted thereon so as to be slidable along the guide shell 2.

[0019] The driving machine body 14, like a normal drifter, is capable of feeding and moving back and forth along the longitudinal direction of the guide shell 2, and is capable of driving a rock bolt B stored in a magazine 6 while pressing the rear end of the rock bolt B on the driving axis CL along the drilling hole.

[0020] In addition, a mount 7 is provided at the tip of the boom 17, with the base end coaxially supported by a rotation shaft 17j of the swing bracket 8 and capable of rotating around the axis of the rotation shaft 17j by the expansion and contraction of the swing cylinder 13. A magazine 6 is attached to the tip of the mount 7 in parallel with the concrete pouring axis CL.

[0021] The magazine 6 is structured so that a plurality of lock bolts B can be loaded at intervals in the circumferential direction. The magazine 6 is supported at its center coaxially with a rotation support housing 7h that is parallel to a rotation axis 17j, and is rotatable about its central axis in response to the drive of an actuator 12 for rotating the magazine.

[0022] The magazine 6 and the mount 7 are connected to the tip of the boom 17 via a rotating shaft 17j so as to be rotatable about the axis of the rotating shaft 17j by the extension and contraction of the swing cylinder 13. A lock cylinder 18 is attached to the base end of the mount 7 as an individual selection means so that its rod can be extended and contracted along the axial direction of the rotating shaft 17j, and it is possible to selectively fix or release the support housing 17h of the boom 17 and the mount 7 according to the extension and contraction of the rod of the lock cylinder 18.

[0023] On the other hand, the swing bracket 8 is provided with a lock cylinder 19 as an individual selection means capable of extending and retracting its own rod along the axial direction of the pivot shaft 17j, and the lock cylinder 19 rod can be extended or retracted to selectively fix or release the support housing 17h of the boom 17 to the swing bracket 8. In other words, the guide shell 2 can be selectively fixed or released to the boom 17 according to the extension or retraction of the rod of the lock cylinder 19.

[0024] In this embodiment, a rotation mechanism is provided that includes a swing cylinder 13 and an individual selection means using the two lock cylinders 18 and 19, and that individually selects the guide shell 2 and the magazine 6 and rotates them relative to the tip of the boom 17 around the axis of the rotation shaft 17j in response to the extension and contraction of the swing cylinder 13.

[0025] Here, a rear bolt clamp 5 is provided axially rearward of the guide shell 2 and protrudes from the side of the driving machine body 14 as a bolt clamping mechanism on the rear side of the guide shell 2 . The rear bolt clamp 5 is attached to a carriage 20 that moves the driving machine body 14 back and forth, and is arranged so that it can rotate integrally with the driving machine body 14 at a position on the driving axis CL by driving the above-mentioned rotation mechanism, and can slide on the guide shell 2 integrally with the driving machine body 14.

[0026] In particular, in this embodiment, the rotation mechanism is configured to rotate the guide shell 2 to position it in a main casting position in which the axis of the casting machine body 14 is positioned on the casting axis CL, and a secondary casting position in which the secondary casting section is positioned on the casting axis CL.

[0027] In this secondary driving position, the rear bolt clamp 5 is a secondary driving section (bolt clamp mechanism) at the rear that protrudes from the side of the driving machine body 14 toward the magazine 6 so as to be able to grip and release the rock bolt B from its side. In this embodiment, the rear bolt clamp 5 is configured to be able to drive the rock bolt B up to the middle of its tip side along the drilled hole by being fed forward together with the driving machine body 14.

[0028] Furthermore, a front bolt clamp 4 is mounted on the swing bracket 8 as a bolt clamp mechanism further forward than the guide shell 2, at a position axially forward of the front ends of the guide shell 2 and the magazine 6. The front bolt clamp 4 is capable of independently rotating about the pin 3 as an axis by the drive of an actuator 9 for rotating the front bolt clamp which is coaxially arranged on the tip side of the rotating shaft 17j.

[0029] The front bolt clamp 4 is provided so as to be rotatable between a front secondary concrete driving position located on the concrete driving axis CL and a retracted position retracted from the concrete driving axis CL by driving the actuator 9. In the front secondary concrete driving position, the front bolt clamp 4 serves as a secondary concrete driving part (bolt clamp mechanism) at the front that is provided protruding toward the magazine 6 side so as to be able to grip the lock bolt B from its side and release it.

[0030] Next, a rock bolt driving process using the rock bolt driving device 200 will be described with reference to Figs. 3 to 12 as appropriate. When driving a rock bolt, first, the rock bolt driving device 200 is fixed in place with the foot pad 21 at the tip so that the driving axis CL of the rock bolt driving device 200 is coaxial with the rock bolt insertion hole (also called the "drilled hole") in the wall surface inside the tunnel.

[0031] Next, as shown in Fig. 3, the boom 17 and the guide shell 2 are connected and fixed to each other by a lock cylinder 19 (see Fig. 2). In this state, the fixing material injection device 15 is disposed so as to be located on the casting axis CL, so the fixing material injection device 15 is operated to move the fixing material injection tube 16 forward and backward from the injection port side of the front bolt clamp 4 to inject the fixing material into the lock bolt insertion hole (Step 1).

[0032] Next, as shown in Figure 4, the actuator 9 for rotating the front bolt clamp is driven to rotate the front bolt clamp 4 towards the bolt clamp side to assume the front secondary concrete pouring position. Furthermore, the swing cylinder 13 is extended to rotate the magazine 6 to a position where it is coaxial with the axis of the gripping / release position of the rear bolt clamp 5 with its gripping part open (the concrete pouring axis CL in the secondary concrete pouring position).

[0033] Once the magazine 6 has been rotated to the gripping / release position, the opening / closing cylinder of the rear bolt clamp 5 is driven in the gripping direction to grip the rock bolt B on the casting axis CL (step 2). In addition, the front bolt clamp 4 is opened to release the front portion from gripping the rock bolt B.

[0034] Next, as shown in Figure 5, the driving machine body 14 is fed forward to advance the rear bolt clamp 5 attached to the driving machine body 14 to a position just before the rear holder 6r of the magazine 6, thereby executing an advance step (step 3) in which the rock bolt B is sent axially forward on the driving axis CL.

[0035] Next, the boom 17 and the magazine 6 are connected and fixed to each other by a lock cylinder 18 (see FIG. 2). After that, the opening and closing cylinder of the front bolt clamp 4 is driven in the gripping direction to close the front bolt clamp 4 and fix the lock bolt B from the side on the driving axis CL, and then the rear bolt clamp 5 is opened to release the grip of the lock bolt B at the rear.

[0036] 6, the swing cylinder 13 is retracted to move the driving machine body 14 away from the magazine 6 to the opposite side, and then the driving machine body 14 is moved backward to the rear end of the guide shell 2 by the rearward feed movement of the driving machine body 14. At this time, the front bolt clamp 4 is held in a position where it grips the rock bolt B on the driving axis CL (step 4).

[0037] 7, the swing cylinder 13 is extended and the driving machine body 14 is rotated to a position where the center of the rod 10 at the tip of the driving machine body 14 coincides with the rear end position of the lock bolt B on the driving axis CL (step 5). Next, the boom 17 and the guide shell 2 are connected and fixed to each other by the lock cylinder 19 (see FIG. 2).

[0038] Furthermore, the swing cylinder 13 is retracted to move the magazine 6 away from the driving machine body 14 on the casting axis CL, and then, as shown in Figure 8, the front bolt clamp 4 is opened to release the gripping state, and the driving machine body 14 is advanced along the guide shell 2 by a forward feed movement until the tip portion of the rod 10 of the driving machine body 14 is positioned in front of the front bolt clamp 4, thereby executing a rear feed process in which the rock bolt B is sent out axially forward on the casting axis CL (step 6).

[0039] Next, as shown in Fig. 9, the actuator 9 (see Fig. 2) is driven to rotate the front bolt clamp 4 to a retracted position to avoid the lock plate and the like at the rear end of the rock bolt B. Thereafter, the driving machine body 14 is further advanced by a forward feed movement, and the rear end of the rock bolt B is pushed forward in the axial direction on the driving axis CL until it reaches the inner periphery wall surface of the tunnel, thereby completing the driving of the rock bolt B (step 7).

[0040] Next, as shown in Figure 10, the driving machine body 14 is retracted to the rear end of the guide shell 2 by a rearward feed movement (step 8). Next, as shown in Figure 11, the swing cylinder 13 is extended to rotate the magazine 6 towards the rear bolt clamp 5. Also, the actuator 9 for rotating the front bolt clamp (see Figure 2) is driven to rotate the front bolt clamp 4 to a position just before the magazine 6 (step 9).

[0041] Next, as shown in Figure 12, the boom 17 and the magazine 6 are connected and fixed to each other by the lock cylinder 18 (see Figure 2). Next, the swing cylinder 13 is retracted to move the magazine 6 away from the driving machine body 14. After that, the magazine 6 is rotated by the magazine rotation actuator 12, and the next lock bolt B is set at the delivery position.

[0042] The actuator 9 for rotating the front bolt clamp is driven to rotate the guide part of the front bolt clamp 4 so that it faces the injection port of the fixing material injection device 15 relative to the driving axis CL of the next rock bolt insertion hole (step 10). By the above steps, it becomes possible to drive rock bolt B using a rock bolt driving device 200 with a total length approximately equal to the length of rock bolt B.

[0043] Next, the effects of the rock bolt driving device 200 of this embodiment and the method of driving a rock bolt B using the same will be described. As described above, when driving rock bolts, in a thick, weak ground layer, a long rock bolt may be used and driven deep in order to further stabilize the ground.

[0044] In this case, as shown in Figure 13(a), in a conventional rock bolt driving device 200P, a rock bolt B of the required length is loaded into a driving machine 1P such as a drifter on the driving axis, and the rear end of the rock bolt B is pushed along the drilled hole by the driving machine 1P in a one-step pushing process to drive the rock bolt B. Therefore, as shown in the figure, the total length Lp of a conventional rock bolt driving device 200P is approximately "rock bolt length La + driving machine length Lb [driving machine body + shank rod + hose reel length (≒ 1.5m to 2m)]". For example, when driving a 6m rock bolt B, the work will be performed using a rock bolt driving device 200P with a total length Lp of approximately 8m.

[0045] In particular, in the bench cut method, in which the tunnel excavation cross section is divided into upper and lower halves and the upper half cross section is excavated in an advanced manner, as shown in Figure 14(a), in tunnel T, the total length L of the rock bolt driving device 200 must be set to a length that fits within the upper half cross section of the face K and to a size that does not interfere with the bench Be.

[0046] However, the thicker the soft ground layer, the longer the rock bolt length becomes. Therefore, in the conventional rock bolt driving device 200P, as shown in FIG. 14(b), a rock bolt driving device 200P with a total length Lp longer than that of the rock bolt B is required.

[0047] Therefore, in the conventional rock bolt installation device 200P, the rock bolt installation device 200P may interfere with the bench Be, making it difficult to perform construction using the bench cut method. Note that FIG. 1B shows an image in which the rear end portion of the rock bolt installation device 200P interferes with the bench Be.

[0048] In contrast, in the rock bolt driving device 200 of this embodiment, as shown again in Figure 13(b), the magazine 6 and the driving machine 1 are arranged parallel to the longitudinal direction of the rock bolt B and overlap when projected in a direction perpendicular to the longitudinal direction.

[0049] Furthermore, in the rock bolt driving device 200 of this embodiment, the guide shell 2 and the magazine 6 are rotatably connected to the boom 17, and front and rear bolt clamps 4, 5 are provided as secondary driving units. In particular, the driving machine body 14 on the guide shell 2 is provided with a rear bolt clamp 5 as a secondary driving unit.

[0050] The rear bolt clamp 5 is driven by a pivoting mechanism to hold the rock bolt B on the casting axis CL from its side in a secondary casting position positioned on the casting axis CL, and by gripping the rock bolt B and feeding it forward together with the casting machine body 14, the rock bolt B can be cast along the drilled hole up to the middle part of the tip side.

[0051] As a result, according to the rock bolt driving device 200 of this embodiment, the rock bolt B can be advanced in two stages by sequentially moving the rotatably connected guide shell 2 and magazine 6, as well as the front and rear bolt clamps 4 and 5, which are stacked in parallel in the longitudinal direction of the rock bolt B, in the specified order described above, over the axial length Lb of the driving machine 1.

[0052] In other words, in the rock bolt driving device 200 of this embodiment, the rock bolt B and the driving machine 1 are not arranged in series as shown in Figure 13(a), but are arranged in parallel along the longitudinal direction of the rock bolt and are arranged so that they overlap in a projected view.Therefore, in the above-mentioned two-stage forward advance process (mainly processes 1 to 3), the driving machine 1 is rotated to the empty space behind the rock bolt B that has been pushed axially forward, and then in the two-stage backward advance process (mainly processes 4 to 7), the driving machine 1 is moved further forward in the axial direction to complete the driving of the rock bolt B.

[0053] Therefore, according to the rock bolt driving device 200 of this embodiment and the method of driving a rock bolt using the same, one rock bolt B is pushed in through a series of driving processes with two-stage progressive feeding, making it possible to perform construction using the rock bolt driving device 200, which has a total length approximately equal to the length of the rock bolt B. In particular, the rock bolt driving device 200 of this embodiment employs a feed mechanism with a simple structure that allows for "two-stage progressive feeding", which is advantageous in terms of reducing the weight and manufacturing costs of the device.

[0054] As described above, according to the rock bolt driving device 200 of this embodiment and the method of driving a rock bolt using the same, the rock bolt is pushed in in two steps through a series of driving processes using the above-mentioned two-stage progressive driving, making it possible to carry out construction using a rock bolt driving device having a total length approximately the same as the length of the rock bolt. Incidentally, the rock bolt driving device according to the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0055] 1. Concrete casting machine 2 Guide Shell 3-pin 4 Front bolt clamp (secondary concrete casting section: bolt clamp mechanism) 5 Rear bolt clamp (secondary concrete casting section: bolt clamp mechanism) 6 Magazine 7 Mount 8 Swing Bracket 9 Actuator (for rotating the front bolt clamp) 10 Rod 11 Hose reel 12 Actuator (for rotating magazine) 13 Swing Cylinder 14 Concrete driving machine body 15 Fixing agent injection device 16 Adhesive injection tube 17. Boom 18 Lock cylinder (individual selection means) 19 Lock cylinder (individual selection means) 20 Carriage 21 Foot Putt 100 Rock bolt installation cart 200 Rock bolt installation device B Rock bolt K Face T-Tunnel CL Pouring axis

Claims

1. A rock bolt installation device that is equipped at the boom tip of a rock bolt installation cart and installs a rock bolt into a drilled hole, A magazine in which the lock bolts are stored; guide shells arranged in parallel along a longitudinal direction of the magazine and within a range overlapping with the magazine when viewed in a projection view in a direction perpendicular to the longitudinal direction; a rotation mechanism that individually selects the magazine and the guide shell and rotates them relative to the tip portion of the boom; A driving machine body that is mounted on the guide shell and can be moved back and forth along the longitudinal direction of the guide shell and can drive the rock bolt stored in the magazine while pressing the rear end of the rock bolt on a driving axis along the drill hole; At least a secondary casting section attached to the casting machine body; Equipped with The pivot mechanism is configured to pivot the guide shell so as to position the main casting posture in which the axis of the casting machine body is positioned on the casting axis along the drill hole, and the secondary casting posture in which the secondary casting section is positioned on the casting axis. The secondary driving section has a bolt clamp mechanism capable of holding the rock bolt on the driving axis from the side in the secondary driving position, and is configured to drive the rock bolt up to the middle of the tip side of the rock bolt along the drilled hole by feeding the rock bolt forward together with the driving machine body while gripping the rock bolt with the bolt clamp mechanism. A rock bolt driving device characterized by the above.

2. The rotation mechanism includes: a support housing provided at the tip of the boom along the longitudinal direction and supporting a rotation shaft therein; a mount that rotatably connects the magazine to the support housing about a pivot axis of the support housing; a swing bracket that connects the guide shell to the support housing so as to be rotatable about a rotation axis of the support housing; a lock cylinder for the magazine, which is an individual selection means for selecting the magazine, and which is provided so as to selectively fix or release the support housing and the mount in accordance with the extension or contraction of its rod; An individual selection means for selecting the guide shell, which is a lock cylinder for the guide shell that is equipped so as to selectively fix or release the support housing and the swing bracket according to the extension and contraction of its own rod; a swing cylinder which rotates the magazine or the guide shell selected by the two individual selection means around the axis of the rotation shaft of the support housing in response to the extension and contraction of its rod; The rock bolt driving device according to claim 1, further comprising:

3. The secondary casting section is A rear bolt clamp is disposed on the driving machine body so as to extend from the side of the driving machine body toward the magazine side, and is rotated together with the driving machine body on the guide shell by a rotational action of the rotation mechanism to be positioned in the secondary driving position, and is provided so as to be able to grip and release the lock bolt on the rear side of the lock bolt in the secondary driving position; a front bolt clamp that is disposed forward of the guide shell and that is configured to be capable of being rotated by a rotational action of its own rotation mechanism to be positioned in a front secondary casting position located on the casting axis and a front retracted position retracted from the casting axis, and that is configured to be able to grip and release the lock bolt in front of the lock bolt in the front secondary casting position; as the bolt clamp mechanism, In the secondary installation position, the front bolt clamp is set to the front secondary installation position, and the rear bolt clamp holds the rear side of the rock bolt from the side of the rock bolt while the feed movement of the installation machine body allows the installation machine to install the rock bolt along the drilled hole up to the middle part of the tip side of the rock bolt, A rock bolt driving device as described in claim 1 or 2, wherein in the main driving position, the front bolt clamp is in the front retracted position, and the remaining rear end portion of the rock bolt that has been driven to the intermediate portion by the forward feed movement of the driving machine body can be driven along the drilled hole while pressing the rear end of the rock bolt.

4. Using the rock bolt installation device according to any one of claims 1 to 3, A method for installing a rock bolt in two steps along a drilled hole, comprising: A forwarding process in which, in the secondary casting position, the secondary casting section holds the rock bolt from the side up to a midpoint on the tip side with the bolt clamp mechanism while casting the rock bolt along the drilled hole; After the forwarding step, in the main casting posture, the remaining portion of the rock bolt is pressed from the rear end of the rock bolt by the driving machine body while driving the bolt along the drilled hole; A method for driving a rock bolt, comprising:

5. The method for driving a rock bolt as described in claim 4, wherein the advancement process drives the rock bolt along the drill hole for a length at least equal to or greater than the axial length of the driving machine body that overlaps with the magazine when projected in a direction perpendicular to the longitudinal direction of the magazine at the tip side of the rock bolt.

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