JP2018017110A - Method and work vehicle for drilling hole for rock bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a work vehicle for drilling a hole for a rock bolt, which enable the hole for the rock bolt to be drilled without a collapse of a peripheral wall of the hole drilled in a slope face.SOLUTION: A method for drilling a hole for a rock bolt includes: a rock bolt hole drilling step of drilling the hole for the rock bolt by using a drilling apparatus comprising a drilling machine having a bit attached to a tip part of a pipe-like casing rod; a hardener infilling step of infilling a hardener into a space between the hole for the rock bolt and the casing rod; a hardener hardening step of hardening the infilled hardener; and an extraction step of extracting the casing rod after the hardener hardening step.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rock bolt hole drilling method and a drilling work vehicle in which a lock bolt hole is drilled on a slope.

  Conventionally, as a drilling method and drilling device for a lock bolt hole in which a lock bolt hole is drilled on a slope, a drilling machine equipped with a double-pipe drilling machine in which an inner rod is provided in a casing rod is used. The lock bolt drilling process for forming the lock bolt drilling holes with the machine, and the casing rod and inner rod of the double-pipe drilling machine from the lock bolt drilling holes formed in the lock bolt drilling process Extracting mortar filling step of filling mortar into the extraction space from the casing rod or inner rod while extracting simultaneously, and inserting a reinforcing bar into the filling mortar before the mortar filled after this extraction mortar filling step is cured. A rock bolt formation method consisting of a rebar insertion process ”and“ an endless track that can travel even on steep slopes ” A work vehicle, a boom attached to the work platform of the work vehicle via a rotation device, a slide support base attached to the boom so as to be slidable in the left-right direction, and a slide support base attached to the slide support base A double-pipe drilling machine with a bit attached to the tip, which can form a rock bolt formation drilling hole of about 7m in the guide shell, and is detachably attached to this double-pipe drilling machine. A mortar supply device that can supply mortar into the extraction space from the bit of the double-pipe drilling machine, and a reinforcing bar attached to the slide support base is inserted into a drilling hole for a lock bolt filled with mortar. There is known a "drilling device characterized by comprising a reinforcing bar insertion device" (Patent Document 1).

  However, in such a lock bolt forming method and the like, the mortar is filled into the extraction space from the casing rod or inner rod while simultaneously removing the casing rod and the inner rod. Even if the peripheral wall collapses or there is a fragile portion (portion that collapsed during drilling) in the peripheral wall (hole wall) of the drilled hole, that portion could not be reinforced.

JP 2012-62656 A

  The present invention provides a lock bolt hole drilling method and a drilling work vehicle capable of drilling a lock bolt hole without collapsing the peripheral wall of the hole drilled in the slope in view of the above-described conventional drawbacks. The purpose is that.

  In order to achieve the above object, a method for drilling a hole for a lock bolt according to the present invention uses a hole drilling device provided with a hole drilling machine having a bit attached to a tip portion of a pipe-like casing rod. Rock bolt drilling step for drilling a hole, a curing agent filling step for filling a space between the lock bolt hole and the casing rod with a curing agent, and a curing agent curing for curing the filled curing agent And a sampling step of extracting the casing rod after the curing agent curing step.

  The drilling work vehicle of the present invention includes a work vehicle main body capable of moving a slope, a drilling device provided in the work vehicle main body for drilling a lock bolt hole, and a lock bolt hole. It is comprised with the hardening | curing agent supply apparatus which can supply a hardening | curing agent, and the said drilling apparatus can rotate the said casing rod and the drilling machine by which the bit was mounted | worn at the front-end | tip of a pipe-shaped casing rod. A casing rod rotating device is provided, and the curing agent supply device can fill the space between the lock bolt hole and the casing rod with the curing agent in a state where the casing rod is positioned in the lock bolt hole. .

As is clear from the above description, the present invention has the following effects.
(1) In each of the inventions according to claims 1 and 10, the space between the lock bolt hole and the casing rod can be filled with a hardener and the hole wall can be hardened with the hardener. Can be prevented from collapsing.
(2) Even when a part of the hole wall is about to collapse during drilling, when the space between the lock bolt hole and the casing rod is filled with the hardener, this part also has a hardener. Since it penetrates, the hole wall can be reinforced and more difficult to collapse.
(3) In each of the inventions according to claims 2 and 11, the same effects as in the above (1) to (2) can be obtained, and a curing agent cured by heat is filled, and the casing rod is rotated. Thus, the curing agent can be cured by applying frictional heat to the filled curing agent.
Therefore, the curing agent can be cured at an arbitrary timing.
(4) In the invention according to claim 3, the same effects as in the above (1) to (2) can be obtained, and the casing hole can be uniformly rotated over the entire hole wall by filling the curing agent. Can be filled with a curing agent.
(5) In each of the inventions according to claims 4 and 12, the same effects as the above (1) to (4) can be obtained and mortar can be easily filled.
(6) In each of the inventions according to claims 5 and 13, the same effects as in the above (1) to (5) can be obtained, and the hardener can be surely distributed over the entire hole wall. it can.
(7) In the inventions according to claims 6 to 9 and claims 14 to 16, the same effects as in the above (1) to (6) can be obtained.

1 to 8 are explanatory views showing a first embodiment of the present invention.
9 to 15 are explanatory views showing a second embodiment of the present invention.
16 to 18 are explanatory views showing a third embodiment of the present invention.
19 and 20 are explanatory views showing a fourth embodiment of the present invention.
Process drawing of 1st Embodiment. The side view of a drilling work vehicle. The side view at the time of slope driving. The longitudinal cross-sectional view of a casing rod and a bit. Explanatory drawing of the drilling process for rock bolts. Explanatory drawing of a hardening | curing agent filling process. Illustration of curing agent curing process Explanatory drawing of an extraction process. Process drawing of 2nd Embodiment. The side view of a drilling work vehicle. The side view at the time of slope driving. The longitudinal cross-sectional view of a casing rod, an inner rod, and a bit. Explanatory drawing of the drilling process for rock bolts. Explanatory drawing of a hardening | curing agent filling process. Explanatory drawing of an extraction process. Process drawing of 3rd Embodiment. The side view of a drilling work vehicle. The longitudinal cross-sectional view of a casing rod, an inner rod, and a bit. Process drawing of 4th Embodiment. Explanatory drawing of a hardening | curing agent filling process.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.
In the first embodiment for carrying out the present invention shown in FIGS. 1 to 7, reference numeral 1 denotes a method for drilling a lock bolt hole in which a lock bolt hole 3 is drilled on a slope 2 or the like.

  As shown in FIG. 1, the rock bolt hole drilling method 1 is a lock bolt hole drilling process 7 in which the lock bolt hole 3 is drilled by a drilling device 6 having a pipe-like casing rod 4. And a curing agent filling step 9 for filling the lock bolt hole 3 with a curing agent 8 (thermosetting curing agent) that can be cured by heat, and after this curing agent filling step 9, the filled curing agent 8 is cured. The curing agent curing step 10 to be performed and the extraction step 11 for extracting the casing rod 4 after the curing agent curing step 10 are configured.

  Further, as shown in FIG. 2, a drilling work vehicle 12 of the present invention used in the rock bolt hole drilling method 1 includes a work vehicle main body 13 capable of traveling on a slope 2, and the work vehicle main body 13. A drilling device 6 that can drill the lock bolt hole 3, a hardener supply device 14 that can supply a hardener 8 that is hardened by heat to the lock bolt hole 3, and a lock bolt. It is comprised with the mortar filling apparatus 16 which fills the mortar 15 in the hole 3 for use.

  The work vehicle main body 13 is provided with an endless track 17 that can travel even on a steep slope 2, and a work table 18 for installing the drilling device 6 is provided.

  A drilling device 6 is provided in a work table 18 of the work vehicle body 13, and the drilling device 6 is rotated in a horizontal direction by a hydraulic cylinder 19 provided at a front center portion of the work table 18. A rotating device 22 comprising: a boom 20 that rotates, and a rotating body 22a that is pivotally supported by a pivot pin 20a on a tip portion of the boom 20 and attached to a hydraulic cylinder 21 so that the tip portion rotates in the vertical direction; A guide shell 23 of about 7 m attached to the rotating body 22a of the rotating device 22 so as to be moved in the vertical direction by the hydraulic cylinder 21, and the guide shell 23 can be moved forward and backward via the forward / backward moving device 24. It is comprised with the drilling machine 25 attached.

  The drilling machine 25 is moved forward and backward along the guide shell 23 by a forward / backward moving device 24, a casing rod rotating device 27 fixed in front of the base plate 26, and the casing rod rotating. A casing rod 4 of about 7 m having a rear end connected to the rotating part of the device 27, a tip part rotatably supported by a support part 28 at the tip part of the guide shell 23, and a bit 29 attached to the tip part. Then, air or flushing water is supplied to the tip of the bit 29, and the air or flushing water and the cut material cut through the communication hole 29 a in the center of the bit 29 are passed through the internal passage 30 in the casing rod 4. The cleaning device 35 to be discharged to the outside, and the inside of the casing rod 4 by switching operation with the cleaning device 35 A curing agent supply device 9 for supplying the curing agent 8 from the passage 30, left and right winches 36 attached to both sides of the rear portion of the work table 18, and wires 37 of the left and right winches 36 are connected to the front portion of the work table 18. It is fixed to the left and right parts of the upper part of the steep slope 2 which is fixed via the wire guide members 38 provided on both sides, at least several times the width of the work table 18 or a part of the width of the work table 18. And an anchor 39.

  Further, in the present embodiment, a mortar filling device 16 is provided to fill the lock bolt hole 3 with the mortar 15 while performing the extraction step 11. The mortar filling device 16 can also be filled with the mortar 15 through the central through hole 29a of the bit 29 by passing through the internal passage 30 of the casing rod 4 by switching operation with the cleaning device 35 and the curing agent supply device 9.

  The curing agent 8 supplied by the curing agent supply device 9 is a thermosetting curing agent 8 that is cured by heat, and a mortar 15, a thermosetting resin, or the like can be used as the curing agent 8.

  In the rock bolt drilling step 7, first, as shown in FIG. 3, the drilling work vehicle 12 is positioned on the slope 2 and moved to the working position by the pulling force of the wire 37 of the winch 36 and the endless track 17. Thereafter, the guide shell 23 of the drilling device 6 is rotated by the rotating device 22 so that the drilling machine 25 is substantially perpendicular to the slope. Thereafter, the drilling machine 25 is moved in the direction of the slope by the forward / backward moving device 24, the casing rod 4 is rotated by the casing rod rotating device 27, and the slope 2 is fixed to the predetermined surface 2 by the bit 29 attached to the tip thereof. Drill to depth.

  At this time, air or flushing water is supplied from the inner passage 30 of the casing rod 4 to the tip of the bit 29, and the air or flushing water and the cut material cut out are discharged to the outside through the communication hole 29a in the center of the bit 29. Let

  As this bit 29, the one having a diameter larger than the diameter of the casing rod 4 is used. In the present invention, after the rock bolt drilling step 7 is performed, a part of the hole wall collapses, and the bit 29 is not caught even after the lock bolt hole 3 is reinforced by the hardener 8 in this state. It means that the diameter of the bit 29 is larger than the diameter of the casing rod 4 to the extent that it can be removed.

  Specifically, it is assumed that the diameter is about 0.5 to 10 mm larger. However, when the bit 29 is provided with a taper such that the connecting portion of the casing rod 4 and the bit 29 has a small diameter, the bit 29 Even if the maximum diameter is 10 mm or more larger than the diameter of the casing rod 4, it is sufficient that the bit 29 can be removed from the lock bolt hole 3 filled with the curing agent 8 without being caught. In the present embodiment, a taper having a maximum diameter of about 4 mm is used.

  By using the bit 29 having an outer diameter larger than that of the casing rod 4 as described above, a gap is generated between the casing rod 4 and the hole wall of the lock bolt hole 3. By filling the gap with the curing agent 8 in the curing agent filling step 9 described later, the curing agent 8 can be reliably applied (filled) to the entire inside of the hole wall.

  In the present embodiment, the endless track 17 is used as a traveling device that can be self-propelled, but a traveling device that uses tires may also be used.

  Moreover, although the endless track 17 (a traveling device capable of self-propelling) and the traction force of the winch 36 are combined, the slope 2 may be traveled using only one of them.

In the hardening agent filling step 9, the inside of the casing rod 4 is supplied from the hardening agent supply device 14 in a state where the hole is made in the rock bolt hole making step 7 (the casing rod 4 etc. is inside the lock bolt hole 3). The curing agent 8 is pumped through the passage 30 through the passage hole 29 a of the bit 29, and the curing agent 8 is supplied to the space between the casing rod 4 and the hole wall of the lock bolt hole 3.
After the hardening agent 8 is sufficiently filled in the space between the casing rod 4 and the hole wall of the lock bolt hole 3, air is supplied to the internal passage 30 of the casing rod 4, and the internal passage of the casing rod 4 is supplied. It is desirable to discharge the curing agent remaining at 30.

In the curing agent curing step 10, the casing rod 4 is rotated by the casing rod rotating device 27 after the curing agent 8 has spread over the entire hole wall. This rotation generates frictional heat, and the curing agent 8 is cured by the frictional heat. As a result, the entire hole wall is coated with the heat-curing curing agent 8, the hole wall is reinforced, and collapse of the hole wall can be prevented.
The extraction step 11 is a step of operating the forward / backward moving device 24 to extract the hole drilling machine 25 from the hole wall.

  In this embodiment, the mortar 15 is filled into the lock bolt hole 3 reinforced by the mortar filling device 16 at the same time as the removal. The reinforcing bars are inserted before the mortar 15 is cured.

  When the mortar 15 is not filled when the extraction step 11 is performed, after the hole drilling machine 25 is extracted, the mortar 15 is separately filled and a reinforcing bar is inserted.

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 9 to 20 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

  The second embodiment for carrying out the present invention shown in FIGS. 9 to 15 is mainly different from the first embodiment for carrying out the present invention in that a pipe-like casing rod 4 and the casing rod 4 are provided. Even with such a drilling work vehicle 12A, the book is provided with a drilling device 6A using a double-pipe drilling machine 25A provided with a pipe-shaped inner rod 5 disposed inside. Effects similar to those of the first embodiment of the drilling work vehicle for carrying out the invention can be obtained.

  The double-pipe type drilling machine 25A includes a base plate 26 that can be moved back and forth along the guide shell 23 by a forward / backward moving device 24, and a casing rod rotating device 27 fixed in front of the base plate 26. The rear end portion is connected to the rotating portion of the casing rod rotating device 27, the front end portion is rotatably supported by the support portion 28 at the front end portion of the guide shell 23, and the bit 29A is attached to the front end portion. The casing rod 4 is connected to the inner rod 5 inserted into the internal passage 30 in the casing rod 4 through the gap 30a and the bit 31 is attached to the tip portion, and the rear end portion of the inner rod 5 is connected. Further, an inner rod rotating device 33 provided with a striking device 32 fixed to the rear of the base plate 26, and the inner rod rotating device 33 and the casing. Air or flushing water is supplied to the tips of the bits 29 and 31 from the gap 30a between the casing rod 4 and the inner rod 5 between the rod rotating device 27 and the communication hole 31a at the center of the bit 31. A cleaning device 35 that discharges air or flushing water and the cut material to the outside through the internal passage 34 in the inner rod 5, and the casing rod 4 and the inner rod 5 by switching operation with the cleaning device 35. A hardener supply device 9 for supplying the hardener 8 from a gap 30a between the right and left winches 36 attached to both sides of the rear portion of the work table 18, and wires 37 of the left and right winches 36 are connected to the work table. Steep slopes that are fixed via wire guide members 38 provided on both sides of the front part of 18 The top of the left and right sites, is composed of an anchor 39 fixed to several times or ten times the width dimension portion in the width dimension of at least the worktable 18.

  Further, as shown in FIG. 9, a drilling method 1A for a rock bolt hole using this drilling work vehicle 12A includes a pipe-shaped casing rod 4 and a pipe-shaped inner rod disposed in the casing rod 4. 5A, a lock bolt hole drilling step 7A for drilling the lock bolt hole 3 with the hole drilling device 6A, and a hardener 8 (thermosetting hardener) curable by heat into the lock bolt hole 3. The curing agent filling step 9A for filling the curing agent, the curing agent curing step 10 for curing the filled curing agent 8 after the curing agent filling step 9A, and the casing rod 4 and the inner rod 5 are extracted after the curing agent curing step 10. Even if it is comprised with the extraction process 11A and it is such a drilling method 1A of the hole for lock bolts, the effect similar to the 1st form for implementing the said this invention is acquired.

  In the rock bolt drilling step 7A, the double-pipe type drilling machine 25A is moved in the slope direction by the forward / backward moving device 24, and the casing rod 4 and the casing rod 4 are moved by the casing rod rotating device 27 and the inner rod rotating device 33. The inner rod 5 is rotated, and the slope 2 is drilled to a predetermined depth by bits 29 and 31 attached to the tip portions thereof. At this time, air or flushing water is supplied from the gap 30a between the casing rod 4 and the inner rod 5 to the leading ends of the bits 29 and 31, and air or flushing water and cutting are supplied from the communication hole 31a in the center of the bit 31. The cut material is passed through the inner rod 5 and discharged to the outside.

In the hardener filling process 9A, the inner rod 5 is penetrated from the hardener supply device 14 in a state where the hole is drilled in the rock bolt hole drilling process 7 (the casing rod 4 is in the lock bolt hole 3). The hardening agent 8 is pressure-fed through the hole 34 through the communication hole 31 a of the bit 31, and the hardening agent 8 is supplied to the space between the casing rod 4 and the hole wall of the lock bolt hole 3.
At this time, it is desirable to provide a backflow prevention mechanism so that the curing agent 8 does not flow backward from the gap 30a between the casing rod 4 and the inner rod 5. For example, a mechanism or the like that pressurizes the gap 30a with air to prevent backflow can be considered.

  The extraction step 11 is a step of operating the forward / reverse movement device 24 to extract the double-pipe type drilling machine 25A from the hole wall.

  The third embodiment for carrying out the present invention shown in FIGS. 16 to 18 is mainly different from the second embodiment for carrying out the present invention in that the casing rod 4 is formed at the tip of the inner rod 5. A double tube having a bit 31A having a substantially same outer diameter as the outer diameter and having a through hole 40 communicating with the gap 30 between the casing rod 4 and the inner rod 5, and having no bit at the tip of the casing rod 4. In the point of using the drilling device 6B having the type of drilling machine 25B, the same working effect as that of the second embodiment for carrying out the present invention can be obtained even with such a drilling work vehicle 12B. .

  A plurality of the through holes 40 are formed at positions corresponding to the gaps 30 a between the casing rod 4 and the inner rod 5. In the present embodiment, five are formed.

  The main difference from the second embodiment for carrying out the present invention is that the air passes through the gap 30a between the casing rod 4 and the inner rod 5 and passes through the through hole 40 of the bit 31A. Alternatively, a lock for supplying flushing water to the tips of the bits 29 and 31, and allowing air or flushing water and the cut material to be cut through the inner rod 5 to be discharged to the outside through the communication hole 31a in the center of the bit 31A. The same effect as that of the first embodiment for carrying out the present invention can be obtained even in the rock bolt hole drilling method 1B in terms of the bolt hole drilling step 7B.

  The fourth embodiment for carrying out the present invention shown in FIGS. 19 and 20 is mainly different from the first embodiment for carrying out the present invention in that a curing agent 8A that is not thermosetting is used. The same effect as the first embodiment for carrying out the present invention can be achieved even in the drilling method 1C for such a lock bolt hole in that the curing agent filling step 9B and the curing agent curing step 10A are performed. Is obtained.

  In the curing agent filling step 9B in the present embodiment, the casing rod 4 is rotated in order to uniformly fill the space between the lock bolt hole 3 and the casing rod 4 with the curing agent 8A. By rotating the casing rod 4, the hardener 8 </ b> A is also supplied to a crack or the like generated in the hole wall when the lock bolt hole 3 is drilled, and the lock bolt hole 3 can be reinforced more reliably. .

  In addition, when the rock bolt hole 3 is easily broken, cracks occur in the hole wall of the lock bolt hole 3 in the drilling operation. After the casing rod 4 and the like are extracted from the lock bolt hole 3, the crack becomes large and the hole wall of the lock bolt hole 3 is broken. As in this embodiment, by rotating the casing rod 4 in the curing agent filling step 9B, the entire locking bolt hole 3 can be uniformly filled with the curing agent 8A, and the rotation also causes the curing agent 8A to move. The hardener 8A can be efficiently filled into the cracks generated in the hole wall.

  The casing rod 4 may be rotated while being filled with the curing agent 8A, or may be rotated after the curing agent 8A is sufficiently filled in the lock bolt hole 3.

Even when the thermosetting curing agent 8 is used, the curing agent filling step 9B may be performed by rotating the casing rod 4 to such an extent that heat is not applied to the curing agent 8.
In the curing agent curing step 10A, curing is performed not by frictional heat but by aging. At this time, the casing rod 4 may be rotated as appropriate so that the curing agent 8A does not cure when attached to the casing rod 4.

In the present embodiment, the drilling work vehicle according to any one of the first to third embodiments may be used as the drilling work vehicle.
In the embodiment of the present invention, the inner rod or the like has a length of about 7 m. However, the inner rod or the like may be short or a rod to which the rod can be added.

  Moreover, a hardening agent etc. may be filled from the clearance gap between a casing rod and an inner rod, and mortar may also be filled from this clearance gap.

INDUSTRIAL APPLICABILITY The present invention is used in the industry for manufacturing a drilling work vehicle that drills rock bolt holes or the like on the slope.

1, 1A, 1B, 1C: Method of drilling holes for rock bolts,
2: slope, 3: lock bolt hole,
4: casing rod, 5: inner rod,
6, 6A, 6B: Drilling device,
7, 7A, 7B: Rock bolt drilling process,
8, 8A: curing agent, 9, 9A, 9B: curing agent filling step,
10, 10A: curing agent curing step, 11, 11A: extraction step,
12, 12A, 12B: Drilling work vehicle, 13: Work vehicle body,
14: curing agent supply device, 15: mortar,
16: Mortar filling device, 17: Endless track,
18: Work table, 19: Hydraulic cylinder,
20: Boom, 21: Hydraulic cylinder,
22: Rotating device, 23: Guide shell,
24: Forward / backward movement device, 25, 25A, 25B: Drilling machine,
26: base plate, 27: casing rod rotating device,
28: support part, 29: bit,
30: Internal passage 31, 31A: Bit
32: striking device, 33: inner rod rotating device,
34: Internal passage, 35: Cleaning device,
36: winch, 37: wire,
38: Wire guide member, 39: Anchor,
40: Through hole.

Claims (17)

A lock bolt hole drilling step for drilling a lock bolt hole using a drilling device provided with a drilling machine having a bit attached to the tip of a pipe-like casing rod, the lock bolt hole and the casing It is composed of a curing agent filling step for filling the space between the rods with a curing agent, a curing agent curing step for curing the filled curing agent, and an extraction step for extracting the casing rod after the curing agent curing step. Drilling method for holes for rock bolts. The method of drilling a hole for a lock bolt according to claim 1, wherein the curing agent curing step applies heat to the curing agent by rotating the casing rod to cure the filled curing agent. . The method of drilling a hole for a lock bolt according to claim 1, wherein the curing agent filling step comprises filling the curing agent and rotating the casing rod. 4. The extraction step according to claim 1, wherein when the casing rod is extracted, the mortar is filled into a lock bolt hole from an internal passage of the casing rod. Of drilling holes for rock bolts. 5. The method for drilling a lock bolt hole according to claim 1, wherein the hardener passes through an internal passage of the casing rod and is filled into the lock bolt hole. 4. The drilling machine of the drilling apparatus is a double-pipe drilling machine in which a pipe-shaped inner rod is provided in a pipe-shaped casing rod. The drilling method of the hole for rock bolts of description. 7. The extraction step is performed while filling a lock bolt hole with mortar from a gap between the casing rod and the inner rod or an inner passage of the inner rod when the casing rod is extracted. A method for drilling a hole for a lock bolt as described in 1. The said hardening | curing agent passes through the clearance gap between this casing rod and the said inner rod, or the internal channel | path of an inner rod, and is filled in the hole for lock bolts, The Claim 6 characterized by the above-mentioned. Drilling method for holes for rock bolts. 9. The drilling method for a lock bolt hole according to claim 1, wherein the bit has a diameter larger than that of the casing rod. Work vehicle main body capable of moving the slope, a drilling device provided in the work vehicle main body for drilling a lock bolt hole, and a hardener supply capable of supplying a hardener to the lock bolt hole The drilling device comprises a drilling machine in which a bit is attached to the end of a pipe-shaped casing rod, and a casing rod rotating device capable of rotating the casing rod, and supplying the curing agent. The apparatus is capable of filling a space between the lock bolt hole and the casing rod with a hardener in a state where the casing rod is positioned in the lock bolt hole. The drilling work vehicle according to claim 10, wherein the curing agent is a curing agent that is cured by heat. The mortar filling device is further provided, and the mortar filling device can pass through the internal passage of the casing rod and fill the hole for the lock bolt with mortar. Hole work vehicle. The drilling work vehicle according to any one of claims 10 to 12, wherein the hardener passes through an internal passage of a casing rod and is filled into a hole for a lock bolt. The drilling machine of the drilling apparatus is a double pipe type drilling machine in which a pipe-shaped inner rod is provided in a pipe-shaped casing rod. The drilling work vehicle described. 15. The cutting according to claim 14, wherein when the casing rod is pulled out, the mortar is filled into a lock bolt hole from a gap between the casing rod and the inner rod or an inner passage of the inner rod. Hole work vehicle. The said hardening | curing agent passes through the clearance gap between this casing rod and the said inner rod, or the internal channel | path of an inner rod, and is filled in the hole for lock bolts, The Claim 14 or Claim 15 characterized by the above-mentioned. Drilling work vehicle. The rock bit hole drilling method according to any one of claims 10 to 16, wherein the bit has a diameter larger than that of the casing rod.

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