CN108825275B - Anchoring hole integrated drilling and reaming construction method - Google Patents
Anchoring hole integrated drilling and reaming construction method Download PDFInfo
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- CN108825275B CN108825275B CN201810534412.1A CN201810534412A CN108825275B CN 108825275 B CN108825275 B CN 108825275B CN 201810534412 A CN201810534412 A CN 201810534412A CN 108825275 B CN108825275 B CN 108825275B
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- 238000005553 drilling Methods 0.000 title claims abstract description 179
- 238000004873 anchoring Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 229910003460 diamond Inorganic materials 0.000 claims description 18
- 239000010432 diamond Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000008602 contraction Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The anchoring hole integrated drilling and reaming construction method comprises the following steps: (1) determining the position of a drilled anchoring hole in a planned region to be supported in a roadway; (2) assembling or connecting a drilling machine, a drill rod, a high-pressure water pipe and an integrated drilling and reaming device; (3) controlling the integrated drilling and reaming device to drill the determined position of the anchoring hole, stopping drilling after the drilling reaches the set depth, and reaming the hole bottom of the anchoring hole; the invention adopts the mode of regulating water pressure to respectively carry out the operations of drilling and reaming; the invention has the advantages of convenient operation, small volume, light weight, flexible and reliable technology, uniform drilling and reaming power source, stable reaming, easy recovery of cutters and realization of drilling and reaming at the same time, greatly improves the anchoring firmness of the anchor rod and ensures the safety of workers in underground operation.
Description
Technical Field
The invention belongs to the technical field of roadway support, and particularly relates to an anchoring hole integrated drilling and reaming construction method.
Background
The anchor rod is used for supporting the underground roadway and has the characteristics of simple structure, convenience in construction, strong adaptability and the like. In recent years, bolt support has become the main mode of roadway support, but the failure mode of the bolt in the engineering application of bolt support is mainly the slippage instability between the bolt and the hole wall when coal ash adhered to the hole wall or broken soft surrounding rock and the like are encountered in the support process and the anchoring process. Through tests and researches, reaming the hole bottom of the anchoring hole is one of means for solving the problem of slippage and instability of the anchor rod, so that the anchor rod can be firmly anchored with the hole wall of the anchoring hole through the injected anchoring agent, but no construction method for reaming the hole bottom while drilling the anchoring hole exists at present.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an anchoring hole integrated drilling and reaming construction method, which completes the drilling and reaming operation of an anchor rod by changing hydraulic power and utilizing the characteristics of a reaming machine, the reamed hole is a conical hole, the state that the anchor rod is stressed weakly in a common cylindrical hole is changed, the anchoring force of the anchor rod is increased, the problem of slippage and instability of the anchor rod and surrounding rock is effectively solved, and the method has important significance for underground safe operation.
In order to solve the technical problems, the invention adopts the following technical scheme: the anchoring hole integrated drilling and reaming construction method comprises the following steps:
(1) determining the position of a drilled anchoring hole in a planned region to be supported in a roadway;
(2) installing or connecting a drilling machine, a drill rod, a high-pressure water pipe and an integrated drilling and reaming device;
(3) controlling the integrated drilling and reaming device to drill the determined position of the anchoring hole, stopping drilling after the drilling reaches the set depth, and reaming the hole bottom of the anchoring hole;
(4) and after reaming is finished, the integrated drilling and reaming device is withdrawn from the anchoring hole, and drilling and reaming operations are finished.
Integral type drilling reaming device is including boring the reaming pole, drilling cutter and reaming cutter, the central line that bores the reaming pole sets up along the fore-and-aft direction, it is provided with external connection screw to bore the outer circumference of rear end of reaming pole, it offers the uncovered and columniform high pressure water cavity of front end with the axial to bore the reaming pole front end, it has seted up the water injection hole along the central line direction in the reaming pole to bore, the front end and the high pressure water cavity intercommunication in water injection hole, drilling cutter's rear end sliding connection is in high pressure water cavity, the reaming cutter evenly is provided with a plurality of along the circumferencial direction of boring the preceding terminal surface of reaming pole, the anterior inboard of reaming cutter cooperates with the circular cone surface roof pressure of drilling cutter.
The drilling tool is in a conical structure with a thick front part and a thin rear part, a plurality of first diamond tool bits are arranged on the front end face and the outer circumferential face of the front end part of the drilling tool, a water through hole is formed in the drilling tool in the vertical direction, a sliding seat connected to the inner wall of the high-pressure water chamber in a sliding mode is arranged at the rear end of the drilling tool, a spline groove is formed in the inner wall of the high-pressure water chamber in the axial direction, splines in sliding fit with the spline groove are uniformly arranged on the outer circumference of the sliding seat, and an annular retainer ring for limiting the.
The inner side face, the front end edge and the outer side face of each hole expanding cutter are provided with a plurality of second diamond cutter heads, the front end of each hole expanding cutter is hinged to the front end of the hole drilling and expanding rod through a pin shaft, the pin shaft is parallel to the tangential direction of the hole drilling and expanding rod, the inner side of the rear end of each hole expanding cutter is provided with a convex block located between the hole expanding cutter and the drilling cutter, an extension spring is arranged between the rear side of the convex block and an annular retainer ring, and under the action of the extension spring, the pin shaft is used as a hinge point, the inner side of the convex block is provided with a diamond wear-resistant layer, and the.
The specific process of the step (2) is as follows: the rear end of the drill rod is arranged on the power output end of the drilling machine, the high-pressure water pipe is connected with the rear end of the drill rod through the high-pressure rotary sealing joint, and the rear end of the drilling and reaming rod is inserted into the front end of the drill rod and is coaxially connected with the drill rod into a whole through threads.
The specific process of the step (3) is as follows: before drilling, the hole expanding cutter is in a contraction state under the action of the extension spring, and the inner side of the front end of the hole expanding cutter is in contact with the outer circumference of the front part of the hole expanding cutter; opening a valve on a high-pressure water pipe, starting a drilling machine, enabling high-pressure water to enter a water injection hole in a drilling and reaming rod through a water hole in a drill rod, enabling the high-pressure water to enter a high-pressure water cavity and then to be pressed against the rear side face of a sliding seat, and enabling the sliding seat of the drilling tool to be pushed forwards by the high-pressure water because the diameter of a water through hole in the drilling tool is much smaller than that of the high-pressure water cavity, so that the drilling tool extends forwards, and the sliding seat of the drilling tool is prevented from being separated from the high-pressure water cavity due to; the outer circumference of the drilling tool is of a cone structure with a thick front part and a thin rear part, the outer circumference of the drilling tool is always in top pressure contact with the lower part of the inner end of the lug under the action of the extension spring, the lug rotates backwards by taking the pin shaft as a central line along with the forward movement of the drilling tool, the hole expanding tool also rotates inwards by taking the pin shaft as a central line, and the rotating diameter of the hole expanding tool is always smaller than that of the drilling tool in the drilling process; meanwhile, the drilling machine drives the drill rod and the hole drilling and expanding rod to rotate at a high speed, the hole drilling and expanding rod drives the drilling tool to rotate through the matching of the spline and the spline groove, the first diamond tool bit at the front end of the drilling tool drills the roadway wall, and the drill rod stops moving forwards until the drill hole reaches the set depth; the water pressure is gradually reduced, because the pressure between the front end of the drilling tool and the hole bottom pushes the drilling tool to move backwards, the sliding seat at the rear end of the drilling tool moves backwards along the high-pressure water cavity, the outer conical surface of the drilling tool can drive the convex block arranged on the inner side of the lower end of the expanding tool to rotate forwards by taking the pin shaft as a central line, the stretching spring is further stretched, the expanding tool also rotates outwards by taking the pin shaft as the central line, the rotating diameter of the expanding tool is gradually increased, along with the reduction of the water pressure, the sliding seat of the drilling tool can be lowered to the rearmost part of the high-pressure water cavity, at the moment, the expanding tool is outwards opened to the maximum, the expanding diameter is also maximized, and the expanding tool and the second diamond tool bit on the expanding.
The specific process of the step (4) is as follows: after reaming is finished, water pressure is increased, the sliding seat is driven by high-pressure water in the high-pressure water cavity to move forwards in the high-pressure water cavity, the drilling tool also moves forwards, the outer diameter of the contact part of the convex block and the outer conical surface of the drilling tool is gradually reduced, the convex block rotates backwards by taking the pin shaft as the central line under the action of the tension spring, the reaming tool also rotates inwards by taking the pin shaft as the central line, the rotating diameter of the reaming tool is gradually reduced, a drill rod is pulled backwards until the rotating diameter of the reaming tool is smaller than or equal to the maximum drilling diameter of the drilling tool, the integrated drilling and reaming device is withdrawn from drilling, a valve on the high-pressure water pipe is.
The front end of the water injection hole and the rear end of the high-pressure water cavity are transited through a horn mouth with a big front and a small rear.
By adopting the technical scheme, the spline grooves are formed in the inner wall of the high-pressure water cavity along the axial direction, and the splines in sliding fit with the spline grooves are uniformly arranged on the outer circumference of the sliding seat, so that the axial sliding fit effect is achieved, and the effect that the drilling rod rotates to drive the drilling tool to rotate is achieved.
The diamond wear-resistant layer on the inner side of the lug is in top pressure fit with the outer conical surface of the drilling tool, the diamond wear-resistant layer can reduce the wear of the lug, the lug is driven to rotate forwards when the drilling tool moves backwards, and meanwhile, the extension spring is further extended. The bell mouth plays the role of reducing the water flow resistance and keeping the water pressure uniform to the pressure of the rear side surface of the sliding seat.
In conclusion, the invention has novel design and scientific principle, adopts the mode of regulating water pressure to respectively carry out the operations of drilling and reaming, and the water flow also has the function of discharging coal scraps and rock scraps in the drilling process from the annular gap between the wall of the drill hole and the drill reaming rod.
Drawings
FIG. 1 is a schematic structural view of an integrated borehole reaming apparatus according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a side view of the reamer tool of FIG. 1;
FIG. 4 is a schematic illustration of a drilling operation using the integrated hole reaming device;
FIG. 5 is a schematic representation of reaming with the integrated hole reaming device;
fig. 6 is a schematic illustration of the drill reaming after the integrated drill reaming device is withdrawn.
Detailed Description
As shown in fig. 1-6, the anchor hole integrated drilling and reaming construction method of the invention comprises the following steps:
(1) determining the position of a drilled anchoring hole in a planned region to be supported in a roadway;
(2) installing or connecting a drilling machine, a drill rod, a high-pressure water pipe and an integrated drilling and reaming device; the drilling machine, drill pipe, high pressure water pipe are not shown in the figure;
(3) controlling the integrated drilling and reaming device to drill the determined position of the anchoring hole, stopping drilling after the drilling reaches the set depth, and reaming the hole bottom of the anchoring hole;
(4) and after reaming is finished, the integrated drilling and reaming device is withdrawn from the anchoring hole, and drilling and reaming operations are finished.
Integral type drilling reaming device is including boring reaming pole 1, drilling cutter 2 and reaming cutter 3, the central line that bores reaming pole 1 sets up along the fore-and-aft direction, it is provided with external connection screw thread 17 to bore the outer circumference of rear end of reaming pole 1, it has seted up the uncovered and columniform high pressure water cavity 4 that is of front end to bore 1 front end coaxial direction, water injection hole 5 has been seted up along the central line direction in boring reaming pole 1, the front end and the high pressure water cavity 4 intercommunication of water injection hole 5, the rear end sliding connection of drilling cutter 2 is in high pressure water cavity 4, reaming cutter 3 evenly is provided with a plurality of along the circumferencial direction of the preceding terminal surface of boring reaming pole 1, the anterior inboard of reaming cutter 3 cooperates with the circular cone surface roof pressure of drilling cutter 2.
The appearance of the drilling tool 2 is a conical structure with a thick front part and a thin rear part, a plurality of first diamond tool bits 6 are arranged on the front end face and the outer circumferential face of the front end part of the drilling tool 2, a water through hole 7 is arranged in the drilling tool 2 along the vertical direction, a sliding seat 8 connected to the inner wall of the high-pressure water cavity 4 in a sliding manner is arranged at the rear end of the drilling tool 2, a spline groove 9 is arranged on the inner wall of the high-pressure water cavity 4 along the axial direction, splines 10 in sliding fit with the spline groove 9 are uniformly arranged on the outer circumference of the sliding seat 8, and an annular retainer ring 11 for limiting the position of the.
The inner side face, the front end edge and the outer side face of each hole expanding cutter 3 are provided with a plurality of second diamond cutter heads 12, the front end of each hole expanding cutter 3 is hinged to the front end of the hole drilling and expanding rod 1 through a pin shaft 13, the pin shaft 13 is parallel to the tangential direction of the hole drilling and expanding rod 1, the inner side of the rear end of each hole expanding cutter 3 is provided with a convex block 16 located between the hole expanding cutter 3 and the drilling cutter 2, a stretching spring 14 is arranged between the rear side of the convex block 16 and the annular retainer ring 11, the pin shaft 13 serves as a hinge point under the action of the stretching spring 14, the inner side of the convex block 16 is provided with a diamond wear-resistant layer, and the diamond wear-. The front end of the water injection hole 5 and the rear end of the high-pressure water cavity 4 are transited through a horn mouth 15 with a large front part and a small rear part. The flare 15 serves to reduce the resistance to water flow and to maintain a uniform pressure on the rear side of the slide 8.
The specific process of the step (2) is as follows: the rear end of a drill rod is arranged on the power output end of a drilling machine, a high-pressure water pipe is connected with the rear end of the drill rod through a high-pressure rotary sealing joint, the rear end of a drilling and reaming rod 1 is inserted into the front end of the drill rod and is coaxially and threadedly connected with the drill rod into a whole, and the drilling and reaming rod 1 is convenient to detach and install from the drill rod.
The specific process of the step (3) is as follows: before drilling is started, the hole expanding cutter 3 is in a contraction state under the action of the extension spring 14, and the inner side of the front end of the hole expanding cutter 3 is in contact with the outer circumference of the front part of the drilling cutter 2; opening a valve on a high-pressure water pipe, starting a drilling machine, enabling high-pressure water to enter a water injection hole 5 in a drilling and reaming rod 1 through a water hole in a drill rod, enabling the high-pressure water to enter a high-pressure water cavity 4 and then to press the rear side face of a sliding seat 8, and enabling the sliding seat 8 of the drilling tool 2 to be pushed forwards by the high-pressure water due to the fact that the diameter of a water through hole 7 in the drilling tool 2 is much smaller than that of the high-pressure water cavity 4, and enabling the sliding seat 8 of the drilling tool 2 not to be separated from the high-pressure water cavity 4 due to the blocking of an annular check ring 11; because the outer circumference of the drilling tool 2 is a cone structure with a thick front part and a thin rear part, under the action of the extension spring 14, the outer circumference of the drilling tool 2 is always in top pressure contact with the lower part of the inner end of the lug 16, the lug 16 rotates backwards with the pin shaft 13 as a central line along with the forward movement of the drilling tool 2, the hole expanding tool 3 also rotates inwards with the pin shaft 13 as a central line, and the rotating diameter of the hole expanding tool 3 is always smaller than that of the drilling tool 2 in the drilling process; meanwhile, the drilling machine drives the drill rod and the hole drilling and reaming rod 1 to rotate at a high speed, the hole drilling and reaming rod 1 drives the drilling tool 2 to rotate through the matching of the spline 10 and the spline 10 groove 9, the first diamond tool bit 6 at the front end of the drilling tool 2 drills a hole on the wall of the roadway, and the drill rod is stopped moving forwards until the drilled hole reaches a set depth; the water pressure is gradually reduced, because the pressure between the front end of the drilling tool 2 and the hole bottom pushes the drilling tool 2 to move backwards, the sliding seat 8 at the rear end of the drilling tool 2 moves backwards along the high-pressure water cavity 4, the outer conical surface of the drilling tool 2 drives the bump 16 arranged on the inner side of the lower end of the expanding tool 3 to rotate forwards by taking the pin shaft 13 as a central line, the stretching spring 14 is further stretched, the expanding tool 3 also rotates outwards by taking the pin shaft 13 as a central line, the rotating diameter of the expanding tool 3 is gradually increased, the sliding seat 8 of the drilling tool 2 can descend to the rearmost part of the high-pressure water cavity 4 along with the reduction of the water pressure, at this time, the expanding tool 3 is opened outwards to the maximum, the expanding diameter also reaches the maximum, and the expanding tool 3 and the second diamond tool bit 12 on the expanding tool 3 expand.
The specific process of the step (4) is as follows: after reaming is finished, water pressure is increased, high-pressure water drives the sliding seat 8 to move forwards in the high-pressure water cavity 4, the drilling tool 2 also moves forwards, the outer diameter of the contact part of the convex block 16 and the outer conical surface of the drilling tool 2 is gradually reduced, the convex block 16 rotates backwards by taking the pin shaft 13 as a central line under the action of the tension spring 14, the reaming tool 3 also rotates inwards by taking the pin shaft 13 as the central line, the rotating diameter of the reaming tool 3 is gradually reduced until the rotating diameter of the reaming tool 3 is smaller than or equal to the maximum drilling diameter of the drilling tool 2, the drill rod is pulled backwards, the integrated drilling and reaming device is withdrawn from drilling, a valve on the high-pressure water pipe is closed, and the drilling.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (3)
1. The anchor hole integrated drilling and reaming construction method is characterized by comprising the following steps of: the method comprises the following steps:
(1) determining the position of a drilled anchoring hole in a planned region to be supported in a roadway;
(2) installing or connecting a drilling machine, a drill rod, a high-pressure water pipe and an integrated drilling and reaming device;
(3) controlling the integrated drilling and reaming device to drill the determined position of the anchoring hole, stopping drilling after the drilling reaches the set depth, and reaming the hole bottom of the anchoring hole;
(4) after reaming is finished, the integrated drilling and reaming device is withdrawn from the anchoring hole, and drilling and reaming operations are finished;
the integrated drilling and reaming device comprises a drilling and reaming rod, a drilling cutter and a reaming cutter, wherein the central line of the drilling and reaming rod is arranged along the front-back direction, the outer circumference of the rear end of the drilling and reaming rod is provided with external connecting threads, the front end of the drilling and reaming rod is coaxially provided with a cylindrical high-pressure water cavity with an open front end, a water injection hole is formed in the drilling and reaming rod along the central line direction, the front end of the water injection hole is communicated with the high-pressure water cavity, the rear end of the drilling cutter is slidably connected in the high-pressure water cavity, the reaming cutter is uniformly provided with a plurality of reaming cutters along the circumferential direction of the front end surface of the drilling and reaming rod, and the inner side of the front part of;
the appearance of the drilling tool is a conical structure with a thick front part and a thin rear part, a plurality of first diamond tool bits are arranged on the front end surface and the outer circumferential surface of the front end part of the drilling tool, a water through hole is arranged in the drilling tool along the vertical direction, a sliding seat connected to the inner wall of the high-pressure water chamber in a sliding manner is arranged at the rear end of the drilling tool, a spline groove is arranged on the inner wall of the high-pressure water chamber along the axial direction, splines matched with the spline groove in a sliding manner are uniformly arranged on the outer circumference of the sliding seat, and an annular retainer;
the inner side surface, the front end edge and the outer side surface of each hole expanding cutter are provided with a plurality of second diamond cutter heads, the front end of each hole expanding cutter is hinged to the front end of the hole drilling and expanding rod through a pin shaft, the pin shaft is parallel to the tangential direction of the hole drilling and expanding rod, the inner side of the rear end of each hole expanding cutter is provided with a convex block positioned between the hole expanding cutter and the drilling cutter, an extension spring is arranged between the rear side of the convex block and the annular retainer ring, and under the action of the extension spring, the pin shaft is taken as a hinge point, the inner side of the convex block is provided with a diamond wear-resistant layer, and the;
the specific process of the step (2) is as follows: the rear end of the drill rod is arranged on the power output end of the drilling machine, the high-pressure water pipe is connected with the rear end of the drill rod through a high-pressure rotary sealing joint, and the rear end of the drilling and reaming rod is inserted into the front end of the drill rod and is coaxially and threadedly connected with the drill rod into a whole;
the specific process of the step (3) is as follows: before drilling, the hole expanding cutter is in a contraction state under the action of the extension spring, and the inner side of the front end of the hole expanding cutter is in contact with the outer circumference of the front part of the hole expanding cutter; opening a valve on a high-pressure water pipe, starting a drilling machine, enabling high-pressure water to enter a water injection hole in a drilling and reaming rod through a water hole in a drill rod, enabling the high-pressure water to enter a high-pressure water cavity and then to be pressed against the rear side face of a sliding seat, and enabling the sliding seat of the drilling tool to be pushed forwards by the high-pressure water because the diameter of a water through hole in the drilling tool is much smaller than that of the high-pressure water cavity, so that the drilling tool extends forwards, and the sliding seat of the drilling tool is prevented from being separated from the high-pressure water cavity due to; the outer circumference of the drilling tool is of a cone structure with a thick front part and a thin rear part, the outer circumference of the drilling tool is always in top pressure contact with the lower part of the inner end of the lug under the action of the extension spring, the lug rotates backwards by taking the pin shaft as a central line along with the forward movement of the drilling tool, the hole expanding tool also rotates inwards by taking the pin shaft as a central line, and the rotating diameter of the hole expanding tool is always smaller than that of the drilling tool in the drilling process; meanwhile, the drilling machine drives the drill rod and the hole drilling and expanding rod to rotate at a high speed, the hole drilling and expanding rod drives the drilling tool to rotate through the matching of the spline and the spline groove, the first diamond tool bit at the front end of the drilling tool drills the roadway wall, and the drill rod stops moving forwards until the drill hole reaches the set depth; the water pressure is gradually reduced, because the pressure between the front end of the drilling tool and the hole bottom pushes the drilling tool to move backwards, the sliding seat at the rear end of the drilling tool moves backwards along the high-pressure water cavity, the outer conical surface of the drilling tool can drive the convex block arranged on the inner side of the lower end of the expanding tool to rotate forwards by taking the pin shaft as a central line, the stretching spring is further stretched, the expanding tool also rotates outwards by taking the pin shaft as the central line, the rotating diameter of the expanding tool is gradually increased, along with the reduction of the water pressure, the sliding seat of the drilling tool can be lowered to the rearmost part of the high-pressure water cavity, at the moment, the expanding tool is outwards opened to the maximum, the expanding diameter is also maximized, and the expanding tool and the second diamond tool bit on the expanding.
2. The anchor hole integrated drilling and reaming construction method according to claim 1, characterized in that: the specific process of the step (4) is as follows: after reaming is finished, water pressure is increased, the sliding seat is driven by high-pressure water in the high-pressure water cavity to move forwards in the high-pressure water cavity, the drilling tool also moves forwards, the outer diameter of the contact part of the convex block and the outer conical surface of the drilling tool is gradually reduced, the convex block rotates backwards by taking the pin shaft as the central line under the action of the tension spring, the reaming tool also rotates inwards by taking the pin shaft as the central line, the rotating diameter of the reaming tool is gradually reduced, a drill rod is pulled backwards until the rotating diameter of the reaming tool is smaller than or equal to the maximum drilling diameter of the drilling tool, the integrated drilling and reaming device is withdrawn from drilling, a valve on the high-pressure water pipe is.
3. The anchor hole integrated drilling and reaming construction method according to claim 1, characterized in that: the front end of the water injection hole and the rear end of the high-pressure water cavity are transited through a horn mouth with a big front and a small rear.
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| CN201810534412.1A CN108825275B (en) | 2018-05-30 | 2018-05-30 | Anchoring hole integrated drilling and reaming construction method |
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| CN201810534412.1A CN108825275B (en) | 2018-05-30 | 2018-05-30 | Anchoring hole integrated drilling and reaming construction method |
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| CN109773230B (en) * | 2019-03-04 | 2021-05-04 | 诸暨迅超工业设计有限公司 | Hole expanding method for blind hole of machined workpiece |
| CN110284914B (en) * | 2019-07-17 | 2021-01-26 | 平安煤炭开采工程技术研究院有限责任公司 | Mixer and anchoring device |
| CN110657974A (en) * | 2019-09-30 | 2020-01-07 | 武大巨成结构股份有限公司 | Anti-pulling test method for anchor head of reaming self-locking anchor rod |
| CN117266752B (en) * | 2023-11-10 | 2024-04-26 | 广东建星建造集团有限公司 | Inertial built-in gear reaming anchor rod drill bit device |
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|---|---|---|---|---|
| CN2241223Y (en) * | 1994-11-03 | 1996-11-27 | 王玉 | Borehole enlarging machine |
| CN2242267Y (en) * | 1995-06-23 | 1996-12-11 | 郭允庄 | Hole formation device for composite changed section pile |
| JP2004177081A (en) * | 2002-11-29 | 2004-06-24 | Shimizu Corp | Disassembling method of refractory material of incinerator |
| JP2004204518A (en) * | 2002-12-25 | 2004-07-22 | Taisei Corp | Excavating device |
| CN203701974U (en) * | 2014-01-22 | 2014-07-09 | 江河(北京)水电防渗工程技术有限公司 | Rock reamer bit special for expanded-foot anchor rod |
-
2018
- 2018-05-30 CN CN201810534412.1A patent/CN108825275B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108825275A (en) | 2018-11-16 |
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Granted publication date: 20200717 |