CN114934798B - Device for enhancing performance of small-bore anchor rod hole-expanding resin anchoring body and working method - Google Patents
Device for enhancing performance of small-bore anchor rod hole-expanding resin anchoring body and working method Download PDFInfo
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- CN114934798B CN114934798B CN202210686761.1A CN202210686761A CN114934798B CN 114934798 B CN114934798 B CN 114934798B CN 202210686761 A CN202210686761 A CN 202210686761A CN 114934798 B CN114934798 B CN 114934798B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 146
- 239000011347 resin Substances 0.000 title claims abstract description 82
- 229920005989 resin Polymers 0.000 title claims abstract description 82
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 112
- 238000005553 drilling Methods 0.000 claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims description 62
- 239000010959 steel Substances 0.000 claims description 62
- 238000010008 shearing Methods 0.000 claims description 21
- 230000009471 action Effects 0.000 claims description 7
- 230000008093 supporting effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 48
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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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
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
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- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
A small-bore anchor rod hole-enlarging resin anchoring body performance enhancing device and a working method thereof comprise a drilling crushing member, a lifting-guiding stirring shearing-resisting member and a variable-diameter plugging member which are sequentially arranged from top to bottom at intervals, wherein the drilling crushing member is arranged at the upper end part of an anchor rod body and is positioned near the hole bottom of an anchoring hole, the lifting-guiding stirring shearing-resisting member is positioned in a hole-enlarging section of the anchoring hole and a lower area thereof, and the variable-diameter plugging member is positioned at an orifice of the anchoring hole; the distance between the drilling crushing member and the variable diameter type plugging member is designed anchoring length, is determined by the length and the quantity of the resin anchoring agent, and is generally 100-140cm. The invention well solves the problem of poor reaming and anchoring effects of the coal mine tunnel, ensures that the resin anchoring agent is uniformly and compactly filled in the whole reaming area to the maximum extent, and improves the comprehensive performance of the reaming and anchoring body of the anchor rod. The invention can be widely applied to the reaming and anchoring engineering of the laneway of the weak coal and rock mass and has remarkable economic and social benefits.
Description
Technical Field
The invention belongs to the technical field of coal mine roadway support, and particularly relates to a device for enhancing the performance of a small-aperture anchor rod hole-expanding resin anchoring body and a working method.
Background
Resin anchor bolt anchoring support is widely applied at home and abroad as a main form of coal mine underground roadway support, the anchoring performance of the resin anchor bolt anchoring support is generally poor for weak stratum coal rock, and most conventional anchoring supports cannot meet the requirements of anchor bolt anchoring support, so that the anchoring effect of a weak coal rock roadway is improved by methods of surrounding rock grouting, anchoring length increase, drill hole diameter increase, drill hole bottom reaming and the like. The method is widely popularized and applied in a coal mine underground site, the anchoring performance of an anchoring system plays a key role in supporting effect, and the stirring effect of the resin anchoring agent is closely related to the anchoring performance because the stirring of the resin anchoring agent is an important process in anchor rod anchoring engineering.
However, the traditional resin anchoring mode is still adopted for anchor rod reaming and anchoring at present, the resin anchoring agent cannot be effectively crushed and uniformly stirred, and particularly, the anchoring effect is poor in a reaming area. Therefore, a small-aperture anchor rod hole-expanding resin anchor body performance enhancing device is developed, a hole-expanding anchor body performance enhancing technology is provided, and important engineering and social significance is achieved for improving the hole-expanding anchoring quality of the anchor rod of the weak roadway.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a small-bore anchor rod hole-expanding resin anchoring body performance enhancing device and a working method thereof, which can avoid the problem of reduction of effective anchoring length caused by accumulation and unstirred reaction of partial resin anchoring agent due to enlarged hole-expanding area space, can effectively ensure that the resin anchoring agent is uniformly and compactly filled in the whole hole-expanding area and blocks the downward outflow of the resin anchoring agent, and can maximally ensure that the anchoring agent is uniformly and compactly arranged in the designed anchoring length and the anchor rod, the anchoring hole and the annular anchoring agent are centered, thereby greatly improving the anchor rod hole-expanding resin anchoring effect.
In order to solve the technical problems, the invention adopts the following technical scheme: a small-bore anchor rod hole-enlarging resin anchoring body performance enhancing device comprises an anchor rod body extending into and installed in an anchoring hole, wherein a drilling crushing member, a lifting-guiding stirring shearing-resistant member and a variable-diameter blocking member are sequentially arranged on the anchor rod body from top to bottom at intervals; the drilling crushing member, the lifting guide stirring shearing resistant member, the variable-diameter type plugging member and the anchor rod body are arranged on the same central line; the distance between the drilling crushing member and the variable diameter type plugging member is designed anchoring length, is determined by the length and the quantity of the resin anchoring agent, and is generally 100-140cm.
Creep into broken component and include the suit and bond in stock body upper end outside and first steel cylinder, first steel cylinder excircle is equipped with tooth form stirring helical blade, first steel cylinder lower extreme is uncovered, the upper end is equipped with the apron, apron upper surface center department is equipped with the screw rod, the screw rod upper end is sharp-pointed, the screw rod excircle is equipped with the auger drilling blade, the apron upper surface is equipped with three pole settings and three broken blades of spiral around screw rod circumference array, pole setting and broken blade interval arrangement of spiral, the pole setting is on a parallel with first steel cylinder central line, the outside is equipped with a plurality of stirring tooth along the even interval of direction of height in the pole setting, three fixed position circles that are located the broken blade top of spiral that are equipped with in pole setting upper end.
The tooth-shaped stirring helical blade is welded on the outer circle surface of the first steel cylinder, the cover plate is welded on the upper port of the first steel cylinder, the screw, the upright rods and the helical crushing blade are welded on the upper surface of the cover plate, the helical drilling blade is welded on the screw, and the positioning ring is welded at the upper ends of the three upright rods; the distance from the top of the positioning ring to the cover plate is 20mm, the diameter of the positioning ring is 28mm, the height of the screw rod is 20mm, the maximum rotary diameter of the spiral drilling blade is 14mm, the height of the spiral crushing blade is 15mm, the height of the first steel cylinder is 22mm, the diameter of the outer circle is 28mm, the length of a cavity in the first steel cylinder is 20mm, the diameter of the cavity is 24mm, and the rotation directions of the spiral crushing blade and the spiral crushing blade are both right-handed; the maximum rotary diameter of the spiral crushing blade is 26mm; the tooth-shaped stirring helical blade is a tooth-shaped thread structure which is spirally arranged upwards from the bottom of the first steel cylinder in a right-handed mode, and the thickness and the width of the tooth-shaped stirring helical blade are both 1mm.
Lead and rise stirring shear member and include the suit and bond at the outside second steel cylinder of stock body, second steel cylinder excircle is from last to being equipped with in proper order down and leading to rise stirring vane, the cylinder shell that shears and leading down and rise stirring vane, it rises stirring vane and leads down and rise stirring vane and be levogyration rectangle helicitic texture to lead, the cylinder shell excircle top-down that shears sets up the protruding ring type structure and the concave ring type structure that a plurality of interval was arranged, concave ring type structure surface evenly is equipped with a plurality of triangle-shaped blade along the circumferencial direction, triangle-shaped blade on every circumference forms a bent leaf disc turbine.
The height of the second steel cylinder is 60mm, the diameter of an outer circle is 29mm, the diameter of an inner hole is 24mm, and the thickness and the width of the upper guide lifting stirring blade and the lower guide lifting stirring blade are both 1mm; each bent blade disc turbine comprises 6 triangular blades, the distance between every two adjacent triangular blades is 15mm, the diameter of an outer circle of each bent blade disc turbine is 29mm, and the thickness of each triangular blade is 2mm.
The diameter-variable plugging component comprises a third steel cylinder which is sleeved and bonded outside the anchor rod body, an annular baffle plate is arranged at the lower end of the third steel cylinder, a T-shaped stirring helical blade is arranged on the upper portion of the excircle of the third steel cylinder, a lead-lifting helical blade is arranged on the lower portion of the excircle of the third steel cylinder, the T-shaped stirring helical blade is of a rectangular threaded structure which is arranged in a right-handed mode, the lead-lifting helical blade is of a rectangular threaded structure which is arranged in a left-handed mode, and one section of the excircle of the third steel cylinder between the lead-lifting helical blade and the T-shaped stirring helical blade is an irregular diameter-variable shell.
The height of the third steel cylinder is 50mm, the diameter of an outer circle is 29mm, the diameter of an inner hole of the third steel cylinder is 24mm, the thicknesses of the lead-rising helical blade and the T-shaped stirring helical blade are both 1.5mm, and the widths of the lead-rising helical blade and the T-shaped stirring helical blade are both 2mm.
A working method of a device for enhancing the performance of a small-aperture anchor rod hole-expanding resin anchoring body comprises the following steps:
(1) Drilling a reaming anchoring hole in the roadway according to the anchor rod reaming supporting technical parameters;
(2) Sequentially sleeving the variable-diameter plugging member and the lifting-guiding stirring shear-resistant member into a certain position of the anchor rod body according to the designed anchoring length to be bonded and fixed, and then sleeving and bonding the drilling crushing member at the end of the anchor rod body;
(3) Pricking the sharp part of the upper end of a screw rod at the top of the drilling and crushing component into the center of the bottom end of the resin anchoring agent, slightly rotating the anchor rod body to ensure that the top end of a spiral crushing blade just drills into the resin anchoring agent, and simultaneously fixing the excircle of the resin anchoring agent by a positioning ring and making the excircle of the resin anchoring agent concentric with the anchor rod body;
(4) Sending the resin anchoring agent into the orifice of the anchoring hole, starting an anchor rod drilling machine, driving the anchor rod to perform clockwise stirring drilling motion by using reasonable parameters, and synchronously drilling a crushing member, a lifting guide stirring shearing-resistant member and a variable-diameter plugging member to perform clockwise stirring drilling along with the anchor rod under the transmission action of the anchor rod body;
(5) Along with the continuous drilling of the anchor rod body, the resin anchoring agent is fully stirred and crushed by the drilling crushing member and moves towards the direction of the hole opening, the lifting stirring shearing-resistant member gradually enters the hole expanding area, and the resin anchoring agent in the hole expanding area is subjected to multi-stage diffusion stirring by the centrifugal force generated by the plurality of bent blade disc turbines; when the resin anchoring agent is transported to the bottom end of the lift-guiding stirring shear-resistant member, the resin anchoring agent is obliquely lifted and transported upwards along the circumference by the upper lift-guiding stirring blade and the lower lift-guiding stirring blade; the resin anchoring agent which reacts uniformly is fully filled in the hole expansion area and is firmly bonded with the hole wall to the maximum extent;
(6) After the anchor rod drills to the bottom of the hole, the resin anchoring agent moves downwards through the T-shaped stirring spiral blade of the variable-diameter plugging member and continuously plugs the downward outflow of the resin anchoring agent under the guiding action of the guiding spiral blade, the outer circle of the annular baffle plate is in sliding contact with the wall of the anchoring hole to ensure that the resin anchoring agent does not overflow, so that the drawing resistance annular ring is filled with the resin anchoring agent, the pulling resistance is improved, meanwhile, the variable-diameter plugging member is centered under the support of the annular baffle plate, the drawing resistance annular ring and the drilling hole are concentric, and the thickness of the formed anchoring body is uniform, so that the anchoring is finished;
(7) And (5) installing an anchor rod tray and pre-tightening a pre-tightening nut to perform pre-tightening to finish anchor rod anchoring work.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the invention has reliable principle, simple structure and easy preparation, can be widely applied to tunnel anchor rod reaming and anchoring engineering and has obvious engineering value.
2. The invention can design and ensure the effective anchoring length, and different designed anchoring lengths can be realized by adjusting the length between the cutting pick crushing stirring piece and the gradually-changed diameter screw rod plugging piece on the premise of 'three-diameter matching' of the anchor rod body, the anchoring hole and the resin anchoring agent cartridge.
3. The invention can effectively improve the reaming anchoring effect under the soft surrounding rock environment, and because the space of the reaming area has a plurality of sections and is enlarged, and the contact part of the end heads among a plurality of resin anchoring agent cartridges is free and unconstrained, the resin anchoring agent cartridges are easy to bend and overlap under the stirring and propelling action of the anchor rod, and are especially easy to accumulate at the multi-section reaming area and the hole wall crack, the invention ensures that the multi-section reaming area is filled with the resin anchoring agent with uniform stirring reaction by virtue of the unique structural characteristics, thereby not only improving the effective anchoring length, but also improving the anchoring force of the anchor rod and enhancing the shearing resistance of the anchor rod at the position.
4. Drilling a crushing member to crush and stir the resin anchoring agent, and transporting the resin anchoring agent downwards; the lifting guide stirring shear-resistant component is arranged according to the number of the reaming sections in the anchoring hole, and the rotation of the upper lifting guide stirring blade, the plurality of groups of bent blade disc turbines and the lower lifting guide stirring blade enables the resin anchoring agent to diffuse to the hole wall of the reaming section, so that the anchoring effect of the reaming section is improved; the variable-diameter plugging member can effectively and continuously plug the downward outflow of the resin anchoring agent, and the uniform and compact anchoring medicine in the designed anchoring length is ensured to the maximum extent.
5. The invention can effectively improve the anchoring force of the anchor rod and the bearing time of the peak intensity thereof, effectively control the deformation of the weak surrounding rock mass, and greatly ensure the safety of personnel and equipment in a tunnel or a tunnel.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the drilling fracturing member;
FIG. 3 is an enlarged view of a lead-up shear stirring member;
FIG. 4 is an enlarged view of the variable diameter occlusion member.
In the figure, the reference numbers are respectively 1-anchor rod body, 2-drilling crushing member, 3-lead-lift stirring shearing resistant member, 4-variable diameter type blocking member, 5-locating ring, 6-spiral drilling blade, 7-spiral crushing blade, 8-tooth-shaped stirring spiral blade, 9-first steel cylinder, 10-shearing resistant cylinder shell, 11-upper lead-lift stirring blade, 12-bent blade disc turbine, 13-second steel cylinder, 14-irregular variable diameter shell, 15-T-shaped stirring spiral blade, 16-lead-lift spiral blade, 17-third steel cylinder, 18-cover plate, 19-screw rod, 20-vertical rod, 21-stirring tooth, 22-lower lead-lift stirring blade, 23-annular baffle plate, 24-arc-shaped stirring strip and 25-shearing hole.
Detailed Description
As shown in fig. 1-4, the performance enhancing device for a small-bore anchor rod hole-enlarging resin anchoring body of the invention comprises an anchor rod body 1 extending into and installed in an anchoring hole, wherein the anchor rod body 1 is sequentially provided with a drilling crushing member 2, a leading and lifting stirring shearing-resistant member 3 and a variable-diameter blocking member 4 at intervals from top to bottom, the drilling crushing member 2 is arranged at the upper end part of the anchor rod body 1 and is positioned near the hole bottom of the anchoring hole, the number of the leading and lifting stirring shearing-resistant members 3 is consistent with the number of hole-enlarging sections in the anchoring hole, the leading and lifting stirring shearing-resistant members 3 are positioned in the hole-enlarging sections and the lower area of the anchoring hole, and the variable-diameter blocking member 4 is positioned at the orifice of the anchoring hole; the drilling crushing member 2, the lifting guide stirring shearing resistant member 3, the variable diameter type plugging member 4 and the anchor rod body 1 are arranged on the same central line; the distance between the drilling crushing member 2 and the variable diameter type blocking member 4 is designed anchoring length, and is determined by the length and the quantity of the resin anchoring agent, and is generally 100-140cm. The 1 excircle of stock body evenly is equipped with a plurality of arc stirring strip 24.
The drilling crushing component 2 comprises a first steel cylinder 9 which is sleeved and adhered to the outer portion of the upper end head of the anchor rod body 1, tooth-shaped stirring spiral blades 8 are arranged on the outer circle of the first steel cylinder 9, the lower end of the first steel cylinder 9 is open, a cover plate 18 is arranged at the upper end of the first steel cylinder, a screw 19 is arranged in the center of the upper surface of the cover plate 18, the upper end of the screw 19 is sharp, spiral drilling blades 6 are arranged on the outer circle of the screw 19, three vertical rods 20 and three spiral crushing blades 7 are arranged on the upper surface of the cover plate 18 in a circumferential array mode around the screw 19, the vertical rods 20 and the spiral crushing blades 7 are arranged at intervals, the vertical rods 20 are parallel to the central line of the first steel cylinder 9, a plurality of stirring teeth 21 are evenly arranged on the outer side of the vertical rods 20 at intervals in the height direction, and a positioning ring 5 located above the spiral crushing blades 7 is fixedly arranged at the upper ends of the three vertical rods 20. The spiral crushing blade 7 is provided with a shearing hole 25, so that the stirring effect on the resin anchoring agent can be improved.
The tooth-shaped stirring helical blade 8 is welded on the outer circle surface of the first steel cylinder 9, the cover plate 18 is welded on the upper end opening of the first steel cylinder 9, the screw rod 19, the upright rods 20 and the helical crushing blade 7 are welded on the upper surface of the cover plate 18, the helical drilling blade 6 is welded on the screw rod 19, and the positioning ring 5 is welded on the upper ends of the three upright rods 20; the distance from the top of the positioning ring 5 to the cover plate 18 is 20mm, the diameter of the positioning ring 5 is 28mm, the height of the screw rod 19 is 20mm, the maximum rotary diameter of the spiral drilling blade 6 is 14mm, the height of the spiral crushing blade 7 is 15mm, the height of the first steel cylinder 9 is 22mm, the diameter of the excircle is 28mm, the length of the inner cavity of the first steel cylinder 9 is 20mm, the diameter of the inner cavity of the first steel cylinder is 24mm, and the rotation directions of the spiral crushing blade 7 and the spiral crushing blade 7 are both right-handed; the maximum rotary diameter of the spiral crushing blade 7 is 26mm; the tooth-shaped stirring helical blade 8 is a tooth-shaped thread structure spirally arranged upwards from the bottom of the first steel cylinder 9 in a right-handed rotating mode, and the thickness and the width of the tooth-shaped stirring helical blade 8 are both 1mm.
Lead and rise stirring shear member 3 and bond at the outside second steel cylinder 13 of stock body 1 including the suit, second steel cylinder 13 excircle is from last to being equipped with in proper order down and leads to rise stirring vane 11, the cylinder shell 10 that shears and lead down and rise stirring vane 22, it leads to rise stirring vane 11 and leads down and rise stirring vane 22 and is levogyration rectangle helicitic texture to lead, the cylinder shell 10 excircle top-down that shears sets up the protruding ring type structure and the concave ring type structure that a plurality of interval arranged, concave ring type structure surface evenly is equipped with a plurality of triangle-shaped blade along the circumferencial direction, triangle-shaped blade on every circumference forms a curved leaf disc turbine 12.
The height of the second steel cylinder 13 is 60mm, the diameter of an outer circle is 29mm, the diameter of an inner hole is 24mm, and the thickness and the width of the upper guide lifting stirring blade 11 and the lower guide lifting stirring blade 22 are both 1mm; each bent blade disc turbine 12 comprises 6 triangular blades, the distance between every two adjacent triangular blades is 15mm, the diameter of an outer circle of each bent blade disc turbine 12 is 29mm, and the thickness of each triangular blade is 2mm.
The variable-diameter plugging member 4 comprises a third steel cylinder 17 which is sleeved and adhered to the outside of the anchor rod body 1, an annular baffle plate 23 is arranged at the lower end of the third steel cylinder 17, a T-shaped stirring helical blade 15 is arranged on the upper portion of the outer circle of the third steel cylinder 17, a lifting guide helical blade 16 is arranged on the lower portion of the outer circle of the third steel cylinder 17, the T-shaped stirring helical blade 15 is of a right-handed rectangular thread structure, the lifting guide helical blade 16 is of a left-handed rectangular thread structure, and one section of the outer circle of the third steel cylinder 17 between the lifting guide helical blade 16 and the T-shaped stirring helical blade 15 is an irregular variable-diameter shell 14.
The height of the third steel cylinder 17 is 50mm, the diameter of the excircle is 29mm, the diameter of the inner hole of the third steel cylinder 17 is 24mm, the thicknesses of the lead-rising spiral blade 16 and the T-shaped stirring spiral blade 15 are both 1.5mm, and the widths of the lead-rising spiral blade 16 and the T-shaped stirring spiral blade 15 are both 2mm.
A working method of a device for enhancing the performance of a small-aperture anchor rod hole-expanding resin anchoring body comprises the following steps:
(1) Drilling a reaming anchoring hole in the roadway according to the anchor rod reaming supporting technical parameters;
(2) Sequentially sleeving a variable-diameter plugging member 4 and a lifting-guiding stirring shear-resistant member 3 into the anchor rod body 1 at a certain position according to the designed anchoring length for bonding and fixing, and then sleeving and bonding a drilling crushing member 2 at the end of the anchor rod body 1;
(3) The sharp part of the upper end of a screw rod 19 at the top of the drilling crushing member 2 is pricked into the center of the bottom end of the resin anchoring agent, the anchor rod body 1 is slightly rotated, so that the top end of a spiral crushing blade 7 just drills into the resin anchoring agent, and meanwhile, the positioning ring 5 fixes the outer circle of the resin anchoring agent and is concentric with the anchor rod body 1;
(4) Sending the resin anchoring agent into the orifice of the anchoring hole, starting an anchor rod drilling machine, driving the anchor rod to perform clockwise stirring drilling motion by using reasonable parameters, and synchronously drilling the crushing member 2, the lifting guide stirring shearing-resistant member 3 and the variable-diameter plugging member 4 to perform clockwise stirring drilling along with the anchor rod under the transmission action of the anchor rod body 1;
(5) With the continuous drilling of the anchor rod body 1, the resin anchoring agent is fully stirred and crushed by the drilling crushing member 2 and moves towards the direction of the hole opening, the lifting stirring shearing-resistant member 3 gradually enters a hole expanding area, and the resin anchoring agent in the hole expanding area is subjected to multi-stage diffusion stirring by the centrifugal force generated by the plurality of bent blade disc turbines 12; when the resin anchoring agent is transported to the bottom end of the lift-guiding stirring shear component 3, the resin anchoring agent is obliquely lifted and transported upwards along the circumference by the upper lift-guiding stirring blade 11 and the lower lift-guiding stirring blade 22; the resin anchoring agent which reacts uniformly is filled in the hole expansion area and is firmly bonded with the hole wall;
(6) After the anchor rod drills to the bottom of the hole, the resin anchoring agent moves downwards through the T-shaped stirring spiral blade 15 of the variable-diameter plugging member 4 and continuously plugs the downward outflow of the resin anchoring agent under the guiding action of the guiding spiral blade 16, the outer circle of the annular baffle plate 23 is in sliding contact with the wall of the anchoring hole to ensure that the resin anchoring agent does not overflow, so that the drawing resistance annular ring is filled with the resin anchoring agent, the pulling resistance is improved, meanwhile, the variable-diameter plugging member 4 is centered under the support of the annular baffle plate 23, the drawing resistance annular ring is concentric with the drilled hole, and the thickness of the formed anchoring body is uniform, and the anchoring is finished;
(7) And (5) installing an anchor rod tray and pre-tightening a pre-tightening nut to perform pre-tightening to finish anchor rod anchoring work.
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 (7)
1. The utility model provides a small aperture stock reaming resin anchor body performance reinforcing means, is including stretching into the stock body of installing in the anchor hole, its characterized in that: the anchor rod body is sequentially provided with a drilling crushing member, a lifting guide stirring shearing-resistant member and a variable-diameter plugging member at intervals from top to bottom, the drilling crushing member is arranged at the upper end part of the anchor rod body and is positioned near the bottom of the anchoring hole, the number of the lifting guide stirring shearing-resistant members is consistent with that of the reaming sections in the anchoring hole, the lifting guide stirring shearing-resistant members are positioned in the reaming sections of the anchoring hole and the lower area of the reaming sections, and the variable-diameter plugging member is positioned at the orifice of the anchoring hole; the drilling crushing member, the lifting guide stirring shearing resistant member, the variable-diameter type plugging member and the anchor rod body are arranged on the same central line; the distance between the drilling crushing member and the variable-diameter plugging member is designed anchoring length, is determined by the length and the quantity of the resin anchoring agent, and is 100-140cm;
creep into broken component and include the suit and bond in stock body upper end outside and first steel cylinder, first steel cylinder excircle is equipped with tooth form stirring helical blade, first steel cylinder lower extreme is uncovered, the upper end is equipped with the apron, apron upper surface center department is equipped with the screw rod, the screw rod upper end is sharp-pointed, the screw rod excircle is equipped with the auger drilling blade, the apron upper surface is equipped with three pole settings and three broken blades of spiral around screw rod circumference array, pole setting and broken blade interval arrangement of spiral, the pole setting is on a parallel with first steel cylinder central line, the outside is equipped with a plurality of stirring tooth along the even interval of direction of height in the pole setting, three fixed position circles that are located the broken blade top of spiral that are equipped with in pole setting upper end.
2. The small-bore stock reaming resin anchoring body performance enhancing device of claim 1, characterized in that: the tooth-shaped stirring helical blade is welded on the outer circle surface of the first steel cylinder, the cover plate is welded on the upper end opening of the first steel cylinder, the screw, the upright rods and the helical crushing blade are welded on the upper surface of the cover plate, the helical drilling blade is welded on the screw, and the positioning ring is welded at the upper ends of the three upright rods; the distance from the top of the positioning ring to the cover plate is 20mm, the diameter of the positioning ring is 28mm, the height of the screw rod is 20mm, the maximum rotary diameter of the spiral drilling blade is 14mm, the height of the spiral crushing blade is 15mm, the height of the first steel cylinder is 22mm, the diameter of the outer circle is 28mm, the length of a cavity in the first steel cylinder is 20mm, the diameter of the cavity is 24mm, and the rotation directions of the spiral crushing blade and the spiral crushing blade are both right-handed; the maximum rotary diameter of the spiral crushing blade is 26mm; the tooth-shaped stirring helical blade is a tooth-shaped thread structure which is spirally arranged upwards from the bottom of the first steel cylinder in a right-handed mode, and the thickness and the width of the tooth-shaped stirring helical blade are both 1mm.
3. The small-bore stock reaming resin anchor body performance enhancing device of claim 2, characterized in that: lead and rise stirring shear member and include the suit and bond at the outside second steel cylinder of stock body, second steel cylinder excircle is from last to being equipped with in proper order down and leading to rise stirring vane, the cylinder shell that shears and leading down and rise stirring vane, it rises stirring vane and leads down and rise stirring vane and be levogyration rectangle helicitic texture to lead, the cylinder shell excircle top-down that shears sets up the protruding ring type structure and the concave ring type structure that a plurality of interval was arranged, concave ring type structure surface evenly is equipped with a plurality of triangle-shaped blade along the circumferencial direction, triangle-shaped blade on every circumference forms a bent leaf disc turbine.
4. The small-bore anchor rod reaming resin anchor body performance enhancing device of claim 3, wherein: the height of the second steel cylinder is 60mm, the diameter of the outer circle is 29mm, the diameter of the inner hole is 24mm, and the thickness and the width of the upper lead-lift stirring blade and the lower lead-lift stirring blade are both 1mm; each bent blade disc turbine comprises 6 triangular blades, the distance between every two adjacent triangular blades is 15mm, the diameter of an outer circle of each bent blade disc turbine is 29mm, and the thickness of each triangular blade is 2mm.
5. The small-bore anchor rod reaming resin anchor body performance enhancing device of claim 4, wherein: the diameter-variable plugging component comprises a third steel cylinder which is sleeved and bonded outside the anchor rod body, an annular baffle plate is arranged at the lower end of the third steel cylinder, a T-shaped stirring helical blade is arranged on the upper portion of the excircle of the third steel cylinder, a lead-lifting helical blade is arranged on the lower portion of the excircle of the third steel cylinder, the T-shaped stirring helical blade is of a rectangular threaded structure which is arranged in a right-handed mode, the lead-lifting helical blade is of a rectangular threaded structure which is arranged in a left-handed mode, and one section of the excircle of the third steel cylinder between the lead-lifting helical blade and the T-shaped stirring helical blade is an irregular diameter-variable shell.
6. The small-bore anchor rod reaming resin anchor body performance enhancing device of claim 5, wherein: the height of the third steel cylinder is 50mm, the diameter of an outer circle is 29mm, the diameter of an inner hole of the third steel cylinder is 24mm, the thicknesses of the lead-rising helical blade and the T-shaped stirring helical blade are both 1.5mm, and the widths of the lead-rising helical blade and the T-shaped stirring helical blade are both 2mm.
7. The working method of the small-aperture anchor rod hole-enlarging resin anchoring body performance enhancing device according to claim 6 is adopted, and is characterized in that: the method comprises the following steps:
(1) Drilling a reaming anchoring hole in the roadway according to the anchor rod reaming supporting technical parameters;
(2) Sequentially sleeving the variable-diameter plugging member and the lifting-guiding stirring shear-resistant member into a certain position of the anchor rod body according to the designed anchoring length to be bonded and fixed, and then sleeving and bonding the drilling crushing member at the end of the anchor rod body;
(3) Pricking the sharp part of the upper end of a screw rod at the top of the drilling and crushing component into the center of the bottom end of the resin anchoring agent, slightly rotating the anchor rod body to ensure that the top end of a spiral crushing blade just drills into the resin anchoring agent, and simultaneously fixing the excircle of the resin anchoring agent by a positioning ring and making the excircle of the resin anchoring agent concentric with the anchor rod body;
(4) Sending the resin anchoring agent into the orifice of the anchoring hole, starting an anchor rod drilling machine, driving the anchor rod to perform clockwise stirring drilling motion by using reasonable parameters, and synchronously drilling a crushing member, a lifting guide stirring shearing-resistant member and a variable-diameter plugging member to perform clockwise stirring drilling along with the anchor rod under the transmission action of the anchor rod body;
(5) Along with the continuous drilling of the anchor rod body, the resin anchoring agent is fully stirred and crushed by the drilling and crushing component and moves towards the direction of the orifice, the lifting stirring and shearing resisting component gradually enters a hole expanding area, and the resin anchoring agent in the hole expanding area is subjected to multistage diffusion stirring through the centrifugal force generated by the plurality of bent blade disc turbines; when the resin anchoring agent is transported to the bottom end of the lift-guiding stirring shear-resistant member, the resin anchoring agent is obliquely upwards transported along the circumference by the upper lift-guiding stirring blade and the lower lift-guiding stirring blade; the resin anchoring agent which reacts uniformly is fully filled in the hole expansion area and is firmly bonded with the hole wall to the maximum extent;
(6) When the anchor rod drills to the bottom of a hole, the resin anchoring agent moves downwards through the T-shaped stirring helical blade of the variable-diameter plugging member and continuously plugs the downward outflow of the resin anchoring agent under the lifting guiding action of the lifting guiding helical blade, the outer circle of the annular baffle is in sliding contact with the wall of the anchoring hole to ensure that the resin anchoring agent does not overflow, so that the drawing resistance annular ring is filled with the resin anchoring agent, the pulling resistance is improved, meanwhile, the variable-diameter plugging member is centered under the support of the annular baffle, the drawing resistance annular ring and the drill hole are concentric, and the thickness of a formed anchoring body is uniform, so that the anchoring is finished;
(7) And (5) installing an anchor rod tray and pre-tightening a pre-tightening nut to perform pre-tightening to finish anchor rod anchoring work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210686761.1A CN114934798B (en) | 2022-06-17 | 2022-06-17 | Device for enhancing performance of small-bore anchor rod hole-expanding resin anchoring body and working method |
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| CN101705831B (en) * | 2009-10-22 | 2011-10-19 | 武汉武大巨成加固实业有限公司 | Construction method for installing support rapidly by using rear chambering self-locking anchor rod |
| CN106437801B (en) * | 2016-11-25 | 2018-04-13 | 中国矿业大学 | A kind of expansible reaming anchoring-bolt and method for protecting support |
| CN207407748U (en) * | 2017-10-23 | 2018-05-25 | 山东建筑大学 | Can explosion reaming and automatic filling stratum vestibule allow pressure energy-absorbing anchoring support device |
| CN210317365U (en) * | 2019-07-11 | 2020-04-14 | 河南理工大学 | Repeated bag breaking and stirring assembly for resin anchoring agent |
| CN113482683B (en) * | 2021-07-14 | 2022-08-23 | 东北大学 | Anchor cable anchoring multi-stage synergistic stirring lift guiding assembly and working method thereof |
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