JP7413173B2 - Rock bolt driving vehicle and rock bolt driving method - Google Patents

Description

The present invention relates to a rock bolt driving vehicle and a rock bolt driving method for driving rock bolts in tunnel construction, mining shaft excavation, or reinforced soil work.

In the rock bolt driving process, rock bolts are driven into the peripheral wall of an excavated tunnel or mine using a rock bolt driving vehicle such as a drill jumbo or a rock bolt driving device. (For example, see Patent Document 1).

Japanese Patent Application Publication No. 5-311996 US-A1-2014/0112724

However, when driving rock bolts using a rock bolt driving vehicle such as a drill jumbo, the work of pouring grout such as mortar and inserting the rock bolts other than the drilling work is performed manually. Therefore, the worker must work near the rock bolt installation area where there is a risk of falling rocks.
On the other hand, there is also known an integrated rock bolt driving device that is capable of performing grout injection work and rock bolt insertion work in addition to drilling work (for example, see Patent Document 2). By using a rock bolt driving vehicle equipped with such an integrated rock bolt driving device, an operator can perform necessary driving work from a location away from the rock bolt driving section.

However, a rock bolt driving vehicle equipped with an integrated rock bolt driving device usually has a specification in which one rock bolt driving device is mounted on a truck. Therefore, in the case of such an integrated rock bolt driving device, until the drilling process of drilling the rock bolt insertion hole is completed, it is not possible to proceed to the next process, which is the grout injection process and the rock bolt insertion process. It becomes impossible.
Therefore, although it is possible for the operator to carry out the required rock bolt driving work from a location away from the rock bolt driving area, unlike the technology described in Patent Document 1 mentioned above, the worker can perform the necessary work for pouring grout such as mortar, etc. other than drilling work. There is a problem in that the efficiency of the pouring work is reduced compared to when the work and lock bolt insertion work are performed manually.

SUMMARY OF THE INVENTION The present invention has been made in view of these problems, and provides a rock bolt driving vehicle that can efficiently drive rock bolts without the worker approaching the rock bolt driving position. An object of the present invention is to provide a method for driving rock bolts.

In order to solve the above problems, a rock bolt driving vehicle according to one aspect of the present invention includes a truck and at least two rock bolt driving boom devices mounted on the left and right sides of the truck, The two rock bolt driving boom devices each include an extendable boom device and a rock bolt driving device mounted on the tip of the boom device via a mount device, and The device includes a drilling device having a rock drill for drilling a rock bolt insertion hole, a grout injection device capable of injecting grout into the rock bolt insertion hole, and a rock bolt insertion device capable of inserting a rock bolt into the rock bolt insertion hole. , the mounting device has a three-position switching mechanism capable of switching the reference axes of the drilling device, the grouting device, and the rock bolt insertion device coaxially with respect to the rock bolt insertion hole to be drilled. In addition, when a posture in which the telescopic axis of the boom device and the reference axis are parallel to each other along the front-rear direction of the truck is referred to as a standard posture, the drilling device, the grout injection device, and The lock bolt insertion device is characterized in that the reference axis of the lock bolt insertion device is mounted at a position offset toward the outside in the width direction of the truck with respect to the telescopic axis of the boom device.

Further, in order to solve the above problems, a rock bolt driving method according to one aspect of the present invention includes a method for driving a plurality of rock bolts on a peripheral wall surface of an excavated tunnel or a mine in order to stabilize the peripheral wall surface of the excavated tunnel or mine. The method is characterized in that the plurality of rock bolts are driven using a rock bolt driving vehicle according to one aspect of the present invention.

According to the present invention, at least two rock bolt driving devices are mounted on the trolley, and the two rock bolt driving devices include an extendable boom device and a boom device mounted at the tip of the boom device. , a drilling device having a rock drill for drilling a rock bolt insertion hole, a grout injection device capable of injecting grout into the rock bolt insertion hole, and a rock bolt insertion device capable of inserting a rock bolt into the rock bolt insertion hole. ing.
Therefore, the drilling work of the rock bolt insertion hole, the work of pouring grout, and the work of inserting the rock bolt can be performed simultaneously in parallel with each rock bolt driving device. Therefore, according to the present invention, the lock bolt can be efficiently driven without the worker approaching the lock bolt driving position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a rock bolt driving vehicle according to one aspect of the present invention, in which (a) is a plan view, (b) is a left side view, and (c) is a front view. FIG. 2 is a diagram illustrating a rock bolt driving operation performed by the rock bolt driving vehicle of FIG. 1, in which (a) is a plan view, (b) is a left side view, and (c) is a front view. FIG. 2 is an explanatory diagram of a drilling device, a grouting device, and a rock bolt insertion device installed in the rock bolt driving boom device of FIG. 1, in which (a) is a plan view thereof, (b) is a left side view, c) is a front view. 4 are perspective views (a) and (b) illustrating the operation of the rock bolt driving device installed in the rock bolt driving boom device of FIG. 3, and in each figure, an image of the turning operation is indicated by an arrow. .

An embodiment of the present invention will be described below with appropriate reference to the drawings. Note that the drawings are schematic. Therefore, it should be noted that the relationships, ratios, etc. between thickness and planar dimensions are different from those in reality, and the drawings also include portions where the relationships and ratios of dimensions are different.
In addition, the embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention. etc., are not limited to the embodiments described below.

As shown in FIG. 1, the rock bolt driving vehicle 100 of this embodiment includes a movable truck 1 having front and rear wheels 7, 8 and outriggers 9 for running. The bogie 1 is provided with an operator cabin 6 that can be raised and lowered at the upper part of the front side of the vehicle body, and a drive unit 2 is provided at the upper part of the rear side of the vehicle body.
The operator cabin 6 has an operation section (not shown) for performing necessary pouring work. In this embodiment, the necessary casting operations include drilling a rock bolt insertion hole, injecting grout into the rock bolt insertion hole, and inserting a rock bolt.

The truck 1 of this embodiment is equipped with two rock bolt driving boom devices 10L and 10R that project forward from the left and right sides of the front portion of the truck 1. The left and right boom devices 10L, 10R each have boom devices 3L, 3R of the same structure (but in opposite directions), and each boom 3 device L, 3R is configured to be able to rotate, raise and lower, and extend and contract.
In this embodiment, rock bolt driving devices 30L and 30R are mounted on the tips of the boom devices 3L and 3R, respectively, for the two rock bolt driving boom devices 10L and 10R.

In the example of this embodiment, two cage booms 12L and 12R are installed on the left and right sides of the upper part of the truck 1, and cages 13L and 13R are provided at the tips of each cage boom 12L and 12R, respectively. There is.
Here, in the rock bolt driving vehicle 100 of the present embodiment, each of the left and right rock bolt driving devices 30L, 30R performs operations such as drilling a rock bolt insertion hole H shown in FIG. 2, injecting grout, and inserting a rock bolt B. This is an integrated lock bolt driving device with left and right hands (symmetrical structure) that can carry out a series of processes.

Note that the left and right lock bolt driving boom devices 10L and 10R have basically the same configuration except that they have different left and right hands (left and right symmetrical structures), so the following description will refer to FIG. 3. , the left rock bolt driving boom device 10L will be illustrated and explained, and the right rock bolt driving boom device 10R will be explained in parentheses to indicate correspondence, and the description thereof will be omitted as appropriate. .
Specifically, as shown in FIG. 1, the left and right rock bolt driving boom devices 10L, 10R are equipped with a mount device 43 via a guide rotary 42 at the tip of each boom device 3L, 3R. 43, the above-mentioned integrated lock bolt driving devices 30L and 30R are mounted.

That is, each rock bolt driving boom device 10L, 10R is provided with the guide rotary 42 as a turning actuator for freely turning the mount device 43, and the lock bolt driving device 30L on the mount device 43, 30R can be moved to a predetermined spatial position within the tunnel T.
As shown in FIG. 3, the rock bolt driving devices 30L and 30R include a drilling device 20 having a rock drill for drilling a rock bolt insertion hole H, a grout injection device 31 capable of injecting grout such as mortar, and a rock bolt insertion hole H. It has a lock bolt insertion device 30 that can insert the lock bolt B into the bolt insertion hole H.

The mount device 43 includes a mount base 48 fixed to the guide rotary 42 side and a swing base 47 rotatably connected to the mount base 48 around a support shaft, as shown in FIG. , a multi-stage cylinder 46 that can be controlled in three positions and rotates the swing base 47 with respect to the mount base 48. The drilling device 20, the grouting device 31, and the lock bolt insertion device 40 are supported on a swing base 47.
The swing base 47 is rotated by a multi-stage cylinder 46 that can be controlled in three positions, so that the respective reference axes of the drilling device 20, grout injection device 31, and rock bolt insertion device 40 are aligned with the rock bolt insertion hole H to be drilled. On the other hand, a three-position switching mechanism that can switch coaxially is constructed.

Here, in each of the rock bolt driving boom devices 10L and 10R of this embodiment, as shown in FIG. When a posture in which the reference axes BLL and BLR of 30R are parallel to each other along the front-rear direction of the trolley 1 (parallel in plan view) is referred to as a "standard posture," in this standard posture, the mount device 43 The reference axes BLL and BLR of the rock bolt driving devices 30L and 30R are offset to the outside in the width direction of the trolley 1 by offset amounts DL and DR with respect to the telescopic axes CLL and CLR of each boom device 3L and 3R. Each is supported.

In other words, each rock bolt driving boom device 10L, 10R is in the above-mentioned standard posture, and the rock bolt driving device 30L, 30R at the tip of each boom device 3L, 3R is aligned with the telescopic axis CLL of the boom device 3L, 3R. , is "offset mounted" so that the reference axes BLL and BLR are located at positions offset outward in the vehicle width direction with respect to the CLR.
Furthermore, in the present embodiment, in the standard posture, the offset amounts DL and DR in the width direction are the same for the cages 13L and 13R when the cage booms 12L and 12R are in the standard posture parallel to the telescopic axes ALL and ALR of the cage booms 12L and 12R. Offset amounts DL and DR that do not interfere are ensured.

As shown in FIG. 3, the drilling devices 20 installed in the left and right rock bolt driving boom devices 10L, 10R are similar to those installed in a normal drill jumbo or the like.
That is, each drilling device 20 includes a respective guide shell 5D, a drifter 4D which is a rock drill mounted on the guide shell 5D, a bit 21, a rod 22, and the like.
A foot pad 23 and a centralizer 24 are respectively attached to the distal end side of the guide shell 5D. A known hydraulic drifter 4D is mounted on the guide shell 5D, and the guide shell 5D is fed along the reference axes BLL and BLR by the feeding mechanism 25 during drilling.

Each guide shell 5D is equipped with a drilling device 20 having a drifter 4D having the same structure as a rock drill for drilling a rock bolt insertion hole H. The punching device 20 is installed at a first switching position in a three-position switching mechanism using a mounting device 43.
Thereby, in the drilling device 20, the centralizer 24 at the tip of the guide shell 5D can support the tip of the rod 22 on the axis where the lock bolt insertion hole is to be drilled.
Then, the drilling device 20 transmits impact force and rotational force from the drifter 4D to the bit 21 via the rod 22, and also applies a feeding force to the drifter 4D with the feeding mechanism 25 to drill a lock bolt insertion hole. Drilling is possible along the reference axes BLL and BLR.

Further, as described above, the rock bolt driving device 30 installed in each rock bolt driving boom device 10L, 10R includes a grout injection device 31 and a rock bolt insertion machine 40. The grout injection device 31 and the rock bolt insertion machine 40 are installed at the tips of the boom devices 3L and 3R via the mounting device 43, and constitute a rock bolt driving device integrated with the drilling device 20.
As shown in FIG. 3, the mounting device 43 is equipped with a three-position switching mechanism rotatable by a multi-stage cylinder 46 that can control three positions. , the grout injection device 31 and the lock bolt insertion machine 40 are configured to be able to switch their operating states by positioning them at the positions of the reference axes BLL and BLR, respectively.

That is, the grout injection device 31 is installed at the second switching position in the three-position switching mechanism by the mount device 43. The grout injection device 31 includes an injection hose 32 and a moving mechanism (not shown), a pump, etc. that reciprocates the injection hose 32, and the movement mechanism inserts the injection hose 32 along the lock bolt insertion hole H. The grout (fixing agent) such as mortar or cement milk can be pumped into the injection hose 32 by driving the pump.

Furthermore, the lock bolt insertion device 40 is installed at the third switching position in the three-position switching mechanism by the mount device 43. The lock bolt insertion device 40 includes a driving device main body 41 including a guide shell 5M, a drifter 4M, a centralizer 44, etc., and a lock bolt supply device 50.
A lock bolt B is attached to the drifter 4M for pouring, and the impact force and rotational force are transmitted to the attached lock bolt B, and the feed mechanism 45 applies a feeding force to the drifter 4M to open the lock bolt insertion hole. Lock bolt B can be pushed in along H. Further, a lock bolt B is supplied to the drifter 4M by a lock bolt supply device 50.

The lock bolt supply device 50 is a lock bolt delivery mechanism having a configuration similar to that of a known rock bolt supply device, which is provided spaced apart from each other in the axial direction of the guide shell 5M on which the drifter 4M is mounted.
The lock bolt supply device 50 includes a magazine 51 that accommodates a plurality of lock bolts B, and a pair of lock bolt carriers 52. The magazine 51 is configured to be rotatable through a predetermined angle around a support shaft 53 by driving a magazine drive motor (not shown).

The pair of lock bolt carriers 52 have a grip/release mechanism and a drive mechanism (not shown), and are rotated by the drive mechanism to move the lock bolt B to the magazine 51 side and the drifter 4M side, respectively, and grip and release the lock bolt B. - The release mechanism constitutes a lock bolt delivery mechanism that delivers the lock bolt B housed in the magazine 51 to the drifter 4M side.

Next, a method for driving a rock bolt B using the above-mentioned rock bolt driving vehicle 100 will be explained.
When using the rock bolt driving vehicle 100 of this embodiment, the rock bolt driving vehicle 100 is first installed near the face K of the tunnel T, as shown in FIG. Then, the left and right rock bolt driving boom devices 10L, 10R of the rock bolt driving vehicle 100 are driven to position each rock bolt driving boom device 10L, 10R at a desired position with respect to the inner wall surface N of the tunnel T. Place it in
Next, the reference axes BLL and BLR of the drilling device 20 installed at the first switching position in the three-position switching mechanism by the mount device 43 are arranged on the drilling axis of the desired lock bolt insertion hole H. The lock bolt insertion hole H is drilled using the drilling device 20 of each lock bolt driving boom device 10L, 10R.

In the example of this embodiment, two rock bolt insertion holes H are drilled in parallel simultaneously on the left and right sides using the two drilling devices 20 of the rock bolt driving boom devices 10L and 10R arranged symmetrically. is possible.
When the drilling device 20 of each lock bolt driving boom device 10L, 10R completes drilling of the lock bolt insertion hole H to a predetermined depth, the mount device 43 is driven to the second switching position for driving each lock bolt. The reference axes BLL and BLR of the grout injection devices 31 of the boom devices 10L and 10R are moved, and the next grout injection operation is immediately started.

In the grout injection work, after aligning the reference axes BLL and BLR of the grout injection device 31 with the rock bolt insertion hole H, the grout injection device 31 is operated to feed grout from the injection hose 32, and the grout is fed into the rock bolt insertion hole H. Fill the inside with grout.
In the example of this embodiment, the grouting devices 31 of the two rock bolt driving boom devices 10L and 10R can perform grouting work at two locations simultaneously on the left and right in parallel.
When the filling of grout into the rock bolt insertion hole H is completed, next, the mount device 43 of each rock bolt driving boom device 10L, 10R is driven, and each rock bolt driving boom is moved to the third switching position. The reference axes BLL and BLR of the lock bolt insertion devices 40 of the devices 10L and 10R are positioned, and the next lock bolt insertion operation is immediately started.

In the lock bolt insertion work, the lock bolt B is taken out from the magazine 51 of the lock bolt supply device 50 attached to the lock bolt inserter 40 and loaded into the lock bolt inserter 40. Next, the lock bolt B is driven by driving the insertion mechanism of the lock bolt inserter 40 to apply a feeding force to the drifter 4M and pushing the lock bolt B along the lock bolt insertion hole.
In the example of this embodiment, two rock bolt inserting machines 40 of the rock bolt driving boom devices 10L and 10R are used to insert the rock bolt B along the lock bolt insertion hole at two locations simultaneously in parallel on the left and right sides. Work is possible.

Hereinafter, the above-mentioned series of rock bolt driving operations are continuously performed in parallel on the left and right for the required number of rock bolts B planned for the inner wall surface N of the mine. is completed.
Here, as disclosed in Patent Document 2, the conventional rock bolt driving device usually has a specification in which one rock bolt driving device is mounted on a truck.
On the other hand, if the rock bolt driving vehicle 100 of this embodiment is used, the cart 1 is equipped with at least two rock bolt driving boom devices 10L and 10R, so the rock bolt driving vehicle 100 of this embodiment is installed. If the driving vehicle 100 is used, the above-described series of rock bolt driving operations can be continuously performed simultaneously in parallel on the left and right sides. Therefore, the lock bolt B can be efficiently driven without the worker approaching the vicinity of the rock bolt B driving position.

In particular, in this embodiment, due to the above-mentioned "offset mounting", the two rock bolt driving boom devices 10L and 10R are able to operate the drilling device 20, the grout injection device 31, and the rock bolt insertion device 40 in the above-mentioned standard posture. The reference axes BLL and BLR are mounted at positions offset outward in the vehicle width direction with respect to the telescopic axes CLL and CLR of each boom device 3L and 3R.
Therefore, for example, as shown in FIG. 4 with an image of the turning/rotating operation indicated by arrows, the lock bolt driving devices 30L and 30R are rotated around the rotation axis of the guide rotary 42, and each boom device 3L, Even if the telescopic axes CLL and CLR of 3R and the reference axes BLL and BLR on the side of the rock bolt driving devices 30L and 30R intersect, each boom device 3L and 3R and the rock bolt driving devices 30L and 30R will not move. The two can be rotated without interfering with each other. Thereby, the reference axes BLL and BLR of the rock bolt driving devices 30L and 30R can be easily positioned at desired positions toward the continuous rock bolt driving positions on the shaft peripheral wall surface N.

Furthermore, as shown in the front view in FIG. 2(c), even when driving rock bolts near the ground contact surface of the rock bolt driving vehicle 100, each boom device is Since the rock bolt driving devices 30L and 30R can be positioned so as to protrude below 3L and 3R, construction can be performed near the ground surface without interfering with the ground surface with each boom device 3L and 3R. .
In addition, the offset amounts DL and DR in the width direction of the vehicle due to "offset mounting" will interfere with the cages 13L and 13R when the cage booms 12L and 12R are in the standard posture parallel to the telescopic axes, as described above. Offset amounts DL and DR that do not occur are secured.

Therefore, even when the cage booms 12L, 12R are extended and contracted along the longitudinal direction of the vehicle, interference between the lock bolt driving devices 30L, 30R and the cages 13L, 13R is prevented. Therefore, additional loading of lock bolts into the lock bolt driving devices 30L, 30R using the cages 13L, 13R and maintenance work can be easily performed.

As described above, according to the present embodiment, the left and right lock bolt driving devices 30L and 30R are configured to be left and right (symmetrical) with respect to the longitudinal direction of the vehicle, and each lock bolt is installed in the above reference position. The reference axes BLL and BLR of the pouring devices 30L and 30R are mounted at positions offset to the outside in the vehicle width direction with respect to the telescopic axes CLL and CLR of the left and right boom devices 3L and 3R. , it is possible to efficiently carry out construction in parallel on the left and right halves while avoiding interference between the rock bolt driving devices 30L and 30R and the boom devices 3L and 3R without the worker approaching the rock bolt driving position. , construction time can be shortened.

Note that the rock bolt driving vehicle and the rock bolt driving method using the same according to the present invention are not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. Of course there is.
For example, in the above embodiment, an example is shown in which at least two rock bolt driving boom devices 10L and 10R are mounted on the left and right sides of the trolley 1, but the invention is not limited to this, and for example, three or more rock bolt driving boom devices are provided. An installation boom device can be provided.

In the case where three lock bolt driving boom devices are provided, in addition to the left and right lock bolt driving boom devices 10L and 10R, a third boom device may be provided at the center of the front part of the truck 1. Furthermore, for example, in a case where four rock bolt driving boom devices are provided, two boom devices may be mounted on each side of the truck 1. Further, as long as at least two rock bolt driving boom devices 10L and 10R are provided, other devices can be adapted to various uses.

1 Dolly 2 Drive section 3L, 3R Boom device 4D Drifter (rock drill)
4M Drifter (Bolt insertion machine)
5D, 5M Guide shell 6 Operator cabin 7, 8 Wheel 9 Outrigger 10L Rock bolt driving boom device 10R Rock bolt driving boom device 12L, 12R Cage boom 13L, 13R Cage 20 Drilling device 21 Bit 22 Rod 23 Foot pad 24 Centra Riser 25 Feeding mechanism 30L, 30R Rock bolt driving device 31 Grout injection device 32 Injection hose 40 Rock bolt insertion device 41 Driving device main body 42 Guide rotary 43 Mounting device 44 Centralizer 45 Feeding mechanism 46 Multistage cylinder 47 Swing base 48 Mount base 50 Lock bolt supply device 51 Magazine 100 Lock bolt driving vehicle B Lock bolt H Lock bolt insertion hole T Tunnel K Face N Inner wall surface

Claims (4)

A truck, and at least two boom devices for driving rock bolts mounted on the left and right sides of the truck, the two boom devices for driving rock bolts each having an extendable boom device, and the boom device. and a rock bolt driving device mounted via a mount device on the tip of the
The rock bolt driving device includes a drilling device having a rock drill for drilling a rock bolt insertion hole, a grout injection device capable of injecting grout into the rock bolt insertion hole, and a rock bolt insertion device capable of inserting a rock bolt into the rock bolt insertion hole. a lock bolt insertion device;
The mount device has a three-position switching mechanism capable of switching the reference axes of the drilling device, the grout injection device, and the rock bolt insertion device coaxially with respect to the rock bolt insertion hole to be drilled, and the boom device When a posture in which the telescopic axis and the reference axis are parallel to each other along the front-rear direction of the trolley is called a reference posture, the drilling device, the grout injection device, and the lock bolt insertion device in the reference posture A rock bolt driving vehicle characterized in that the reference axis of the boom device is mounted at a position offset toward the outside in the width direction of the bogie with respect to the telescopic axis of the boom device. 2. The rock bolt driving vehicle according to claim 1, wherein the rock bolt driving devices mounted on the two rock bolt driving boom devices are configured to have opposite right and left sides. Cage booms are installed on the left and right sides of the upper part of the trolley, and a cage is provided at the tip of each cage boom,
The mount device interferes with the cage when the offset positions of the reference axes of the drilling device, the grout injection device, and the lock bolt insertion device are in the reference posture parallel to the telescopic axis of the cage boom. The rock bolt driving vehicle according to claim 1 or 2, wherein an offset amount that does not occur is ensured. A method of driving a plurality of rock bolts into a peripheral wall surface of an excavated tunnel or a mine in order to stabilize the peripheral wall surface, the method comprising:
A method for driving a rock bolt, the method comprising driving the plurality of rock bolts using the rock bolt driving vehicle according to any one of claims 1 to 3.

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