CN114382521B - Sectional type large-deformation recyclable anchor rod and use method thereof - Google Patents
Sectional type large-deformation recyclable anchor rod and use method thereof Download PDFInfo
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- CN114382521B CN114382521B CN202210049399.7A CN202210049399A CN114382521B CN 114382521 B CN114382521 B CN 114382521B CN 202210049399 A CN202210049399 A CN 202210049399A CN 114382521 B CN114382521 B CN 114382521B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 96
- 239000011435 rock Substances 0.000 claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 7
- 238000004873 anchoring Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
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- 238000005065 mining Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 208000013201 Stress fracture Diseases 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
- 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
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
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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
- E21D21/008—Anchoring or tensioning means
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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
- E21D21/0086—Bearing plates
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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
- E21D21/0093—Accessories
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a sectional type large-deformation recoverable anchor rod and a use method thereof, and relates to the technical field of anchor rods, the sectional type large-deformation recoverable anchor rod comprises a sectional type self-drilling anchor rod and a positioning self-locking sleeve for self-locking and fixing in a rock, the sectional type self-drilling anchor rod is in threaded connection with the positioning self-locking sleeve, and the sectional type self-drilling anchor rod is sequentially sleeved with a first annular elastoplast body, an outer sleeve, a second annular elastoplast body, a rotating sleeve, a third annular elastoplast body and a limiting assembly which are mutually abutted in a direction gradually far away from the interior of the rock; the internal surface of rotatory sleeve can be dismantled with the sectional type from boring the stock and be connected, and the external surface of rotatory sleeve can be dismantled with the internal surface of outer sleeve and be connected, and spacing subassembly can be dismantled with the sectional type from boring the stock and be connected. The anchor rod has the triple functions of recoverability, large deformation and sectional installation, and has the characteristics of simple construction, quick anchoring effect, low cost, strong applicability, easy popularization and the like.
Description
Technical Field
The invention relates to the technical field of anchor rods, in particular to a sectional type large-deformation recyclable anchor rod and a using method thereof.
Background
Along with the decreasing of reserves of underground shallow energy and metal mineral resources, the mining depth is continuously increased, the faced mining environment and geological conditions are increasingly complex, in deep underground engineering, the broken surrounding rocks of some high ground stress areas are easy to deform and damage greatly, so that the deep high-stress roadway is difficult to support, and huge life and property losses are caused to constructors and production equipment. The problems are technical problems to be solved in the aspect of safe and efficient development of deep mineral resources in China. Meanwhile, with the development of underground space, the problem of environmental protection of underground space is increasingly emphasized.
In the field of underground engineering support, anchor rods are widely used due to the advantages of convenience in installation, simplicity and convenience in construction, low cost and the like, and anchor rod support technology is continuously improved and perfected along with the expansion of engineering application range and the increasing demand. The anchor rod mainly utilizes the special structures of the head part and the rod body and the tail supporting plate, or combines the surrounding rock and the stable rock body together by depending on the bonding effect to change the mechanical state of the surrounding rock, a whole and stable rock zone is formed around the roadway, and the combined action of the anchor rod and the surrounding rock is utilized to generate the suspension effect, the combined beam effect and the reinforcement effect, thereby achieving the purpose of maintaining the stability of the roadway.
With the use of a large number of anchor rods, great pressure is brought to the underground environment, and if the anchor rods are not recycled after the use period is over or the support function is invalid, not only can resources be wasted, but also metal pollution to the underground environment is caused; meanwhile, under the action of high stress at the deep part, the surrounding rock is easy to deform greatly, and if the surrounding rock is supported by only the anchor rod, the extending length of the surrounding rock is often insufficient and the surrounding rock is easy to break and fail. Finally, most of the existing integrated anchor rods cannot meet the use requirements of different anchor hole depths due to different supporting requirements.
Therefore, it is highly desirable to develop a sectional type anchor rod with large deformation and recoverable function to meet the development requirements of deep underground engineering.
Disclosure of Invention
The invention aims to provide a sectional large-deformation recyclable anchor rod and a using method thereof, which can be recycled after the service life is finished, reduce the pollution to underground space, can meet the large-deformation requirement of high-stress-fracture surrounding rock and can be installed in sections.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a bed body reactor, which comprises a sectional type self-drilling anchor rod and a positioning self-locking sleeve for self-locking and fixing in a rock, wherein the sectional type self-drilling anchor rod is in threaded connection with the positioning self-locking sleeve, and a first annular elastoplastomer, an outer sleeve, a second annular elastoplastomer, a rotating sleeve, a third annular elastoplastomer and a limiting assembly which are mutually abutted are sequentially sleeved on the sectional type self-drilling anchor rod along the direction gradually far away from the interior of the rock;
the outer sleeve is used for being connected with the rock wall can be dismantled, the internal surface of rotatory sleeve with the connection can be dismantled to the sectional type self-drilling stock, the surface of rotatory sleeve with the connection can be dismantled to the internal surface of outer sleeve, spacing subassembly with the connection can be dismantled to the sectional type self-drilling stock.
Furthermore, the positioning self-locking sleeve comprises a connecting part, an opening and closing part and a limiting steel thorn;
one end of the connecting part is in threaded connection with the sectional type self-drilling anchor rod, the other end of the connecting part is connected with the opening and closing part, and the opening and closing part is used for opening to be abutted against the rock under the pushing of the sectional type self-drilling anchor rod;
the limiting steel pricks are distributed on the outer surface of the connecting part and used for limiting the position of the connecting part relative to the rock.
Furthermore, the positioning self-locking sleeve further comprises a rubber lock cap, and the rubber lock cap is sleeved on the end part of the opening and closing part departing from the connecting part.
Further, the sectional type is from boring the stock and is included connector and a plurality of threaded connection's segmentation joint in proper order, is located one of tip the segmentation joint with the one end threaded connection of connector, the other end of connector with location auto-lock sleeve threaded connection.
Further, the segmented joint comprises a rod piece, a convex part, a concave part and a buckle;
the convex parts and the concave parts are respectively arranged at two ends of the rod piece, the convex parts extend into the concave parts on the adjacent segmented joints and are in threaded connection with the concave parts, or the convex parts extend into the end parts of the adjacent connectors and are in threaded connection with the connectors;
the concave surface of establishing the portion has the draw-in groove, the buckle connect in the member is equipped with the protruding one end of establishing the portion, the buckle is with adjacent on the segmentation connects the draw-in groove joint, perhaps the buckle is with adjacent the tip surface joint of connector.
Furthermore, one end of the connector in threaded connection with the positioning self-locking sleeve is provided with a self-drilling drill bit extending into the positioning self-locking sleeve.
Further, the inner surface of the rotating sleeve is threadedly connected to the rod in one of the segmented joints located outside the rock, and the outer surface of the rotating sleeve is threadedly connected to the outer sleeve.
Furthermore, the screwing direction of the thread on the inner surface of the rotating sleeve is the same as that of the thread on the convex arrangement part.
Further, the first, second and third annular elastoplasts are of different plasticity.
In a second aspect, the present invention provides a method for using a sectional type large-deformation recoverable anchor rod, which is applied to the sectional type large-deformation recoverable anchor rod, and includes:
drilling a hole on the rock to form a drilling section, reaming one end of the drilling section close to the rock surface to form a reaming section, and cleaning the drilling section and the reaming section;
connecting the sectional self-drilling anchor rod with the positioning self-locking sleeve;
advancing the positioning self-locking sleeve to a designated position;
sequentially mounting the first annular elastoplastomer, the outer sleeve, the second annular elastoplastomer and the rotary sleeve at the hole bottom of the reaming section, rotating the rotary sleeve to connect the rotary sleeve with the outer sleeve, and sequentially mounting a third annular elastoplastomer and the limiting assembly;
and rotating the sectional type self-drilling anchor rod to enable the sectional type self-drilling anchor rod to advance in the positioning self-locking sleeve, so that the positioning self-locking sleeve is self-locked and fixed in the rock by means of a self structure, and the application of pre-tightening force is completed.
The sectional type large-deformation recyclable anchor rod and the use method thereof provided by the invention can produce the following beneficial effects:
when the sectional type large-deformation recoverable anchor rod provided by the invention is used, the first annular elastic-plastic body, the second annular elastic-plastic body and the third annular elastic-plastic body can absorb energy released by deformation of surrounding rocks through compression deformation when the surrounding rocks are subjected to large deformation, and the whole anchoring structure is allowed to generate larger deformation to meet the large deformation requirement of high-stress rupture surrounding rocks. After the service life, dismantle spacing subassembly, third annular elastoplastomer, rotatory sleeve, second annular elastoplastomer, outer sleeve and first annular elastoplastomer, rotate the sectional type from boring the stock afterwards and make it and location auto-lock sleeve unblock, can in time take out the sectional type from boring the stock, the sectional type is from boring the stock and can be broken apart in sections, both can be with the material recovery of sectional type from boring the stock and recycle, can reduce the pollution to underground space again.
Compared with the prior art, the sectional type large-deformation recoverable anchor rod provided by the invention has the triple functions of recoverability, large deformation and sectional installation, has the characteristics of simple construction, quick anchoring effect, low cost, strong applicability, easiness in popularization and the like, and is suitable for the engineering fields of supporting and reinforcing soft rock slopes, deep foundation pits, mine roadways, deep underground engineering and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic illustration of a borehole provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of reaming provided by an embodiment of the present invention;
FIG. 3 is a schematic view of a segmented self-drilling anchor rod and positioning self-locking sleeve installation provided by an embodiment of the invention;
FIG. 4 is a schematic view of a sectional type large deformation retrievable anchor rod installation provided by an embodiment of the invention;
FIG. 5 is a schematic structural view of a positioning self-locking sleeve according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a segmented self-drilling bolt provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a segmented joint according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view A-A of FIG. 7;
FIG. 9 is a schematic structural diagram of a rotating sleeve according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view B-B of FIG. 9;
FIG. 11 is a schematic view of an outer sleeve according to an embodiment of the present invention.
Icon: 1-sectional self-drilling anchor rod; 11-a connector; 111-self drilling bits; 112-rod end threads; 12-a segmented joint; 121-a rod member; 1211-rotating thread; 122-raised portion; 123-a recessed portion; 124-buckling; 125-pins; 2-positioning the self-locking sleeve; 21-a connecting part; 211 — a first internal thread; 22-an opening and closing part; 23-limiting steel pricks; 24-rubber locking cap; 3-a first annular elastoplastomer; 4-an outer sleeve; 5-a second annular elastoplastomer; 6-rotating the sleeve; 61-rotating the groove; 62-a second thread; 7-a third annular elastoplastomer; 8-a limiting component; 81-a tray; 82-a limit nut; 9-drilling a hole section; 10-a reaming section.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The embodiment of the first aspect of the invention provides a sectional type large-deformation recoverable anchor rod, which comprises a sectional type self-drilling anchor rod 1 and a positioning self-locking sleeve 2 for self-locking and fixing in a rock, wherein the sectional type self-drilling anchor rod 1 is in threaded connection with the positioning self-locking sleeve 2, and the sectional type self-drilling anchor rod 1 is sequentially sleeved with a first annular elastoplastic body 3, an outer sleeve 4, a second annular elastoplastic body 5, a rotating sleeve 6, a third annular elastoplastic body 7 and a limiting assembly 8 which are mutually abutted in a direction gradually far away from the interior of the rock; the outer sleeve 4 is used for being connected with the rock wall can be dismantled, and the internal surface of rotatory sleeve 6 can be dismantled with sectional type self-drilling stock 1 and be connected, and the external surface of rotatory sleeve 6 can be dismantled with the internal surface of outer sleeve 4 and be connected, and spacing subassembly 8 can be dismantled with sectional type self-drilling stock 1 and be connected.
The sectional type large-deformation recoverable anchor rod can be applied to the engineering fields of supporting and reinforcing of soft rock side slopes, deep foundation pits, mine roadways and deep underground engineering, and the following application of the anchor rod to surrounding rocks of mines is specifically explained:
as shown in fig. 1 and 2, before the sectional type large deformation recoverable anchor rod is installed, drilling and reaming operations are required. Firstly, drilling a drilling section 9 on the surrounding rock; then, expanding a hole expanding section 10 at the end part of the drilling section 9 close to the rock wall, wherein the hole expanding section 10 is arranged for axially limiting one end of the first annular elastoplastic body 3; then, as shown in fig. 3, the sectional type self-drilling anchor rod 1 is in threaded connection with the positioning self-locking sleeve 2, and the positioning self-locking sleeve 2 is pushed to a designated position, wherein the designated position can be selected according to the supporting requirement; then, as shown in fig. 4, a first annular elastoplastomer 3, an outer sleeve 4, a second annular elastoplastomer 5 and a rotating sleeve 6 are sequentially arranged at the bottom of the hole of the reaming section 10, the inner surface of the rotating sleeve 6 is detachably connected with the sectional self-drilling anchor rod 1, the rotating sleeve 6 penetrates through the second annular elastoplastomer 5, and the outer surface of the rotating sleeve 6 is detachably connected with the outer sleeve 4; then, a third annular elastoplastic body 7 and a limiting assembly 8 are sequentially installed, and under the action of the limiting assembly 8, the third annular elastoplastic body 7 tightly presses the end face of the rotating sleeve 6; and finally, the sectional type self-drilling anchor rod 1 is rotated to enable the sectional type self-drilling anchor rod 1 to advance in the positioning self-locking sleeve 2, so that the positioning self-locking sleeve 2 is fixed in the rock in a self-locking mode, and the pre-tightening force is applied. After the service life of the sectional type self-drilling anchor rod 1 is finished, the limiting assembly 8 is firstly removed, then the sectional type self-drilling anchor rod 1 is rotated to be unlocked with the positioning self-locking sleeve 2, other structures except the positioning self-locking sleeve 2 are taken out, and the recovery of the device is completed.
Wherein, the arrangement of outer sleeve 4 can exert protection to reaming section 10 and prevent collapsing the hole, and outer sleeve 4 passes through bolt and nut to be fixed at the rock wall department. The first annular elastoplastic body 3, the second annular elastoplastic body 5 and the third annular elastoplastic body 7 are subjected to compression deformation to adapt to large deformation of the surrounding rock, and the second annular elastoplastic body 5 can bear impact on the outer sleeve 4 and the rotating sleeve 6 caused by initial deformation of the surrounding rock in a moment, so that thread dislocation between the first annular elastoplastic body and the second annular elastoplastic body is prevented.
Therefore, the embodiment realizes the recoverable function of the anchor rod by adopting the separated design of the sectional type self-drilling anchor rod 1 and the positioning self-locking sleeve 2, realizes the large-deformation yielding function by using the first annular elastoplastomer 3, the second annular elastoplastomer 5 and the third annular elastoplastomer 7, and has higher adaptability to the drilling holes with any depth under different working conditions by using the sectional type self-drilling anchor rod 1.
It should be noted that what is referred to as large deformation in the sectional large-deformation recoverable anchor rod is that the first annular elastoplastic body 3, the second annular elastoplastic body 5 and the third annular elastoplastic body 7 can all deform, and the deformation of the three is superposed to realize a large deformation effect.
The following is a detailed description of the positioning self-locking sleeve 2:
in some embodiments, as shown in fig. 5, the positioning self-locking sleeve 2 comprises a connecting portion 21, an opening and closing portion 22 and a limiting steel prick 23; one end of the connecting part 21 is in threaded connection with the sectional type self-drilling anchor rod 1, the other end of the connecting part 21 is connected with the opening and closing part 22, and the opening and closing part 22 is used for opening to abut against rocks under the pushing of the sectional type self-drilling anchor rod 1, so that the sectional type self-drilling anchor rod 1 is allowed to continuously drill, and the connecting part 21 is prevented from continuously following; the limiting steel pricks 23 are distributed on the outer surface of the connecting part 21, and the limiting steel pricks 23 are used for limiting the position of the connecting part 21 relative to the rock, namely, the connecting part 21 is anchored in the surrounding rock through the limiting steel pricks 23.
It will be appreciated that the drilling direction is from left to right in fig. 4, i.e. the split part 22 is designed to allow the sectional self-drilling bolt 1 to drill to the right while being pushed by the sectional self-drilling bolt 1 to open up against the surrounding rock and prevent the connecting part 21 from following the sectional self-drilling bolt 1 to move to the right under the influence of friction. The limiting steel pricks 23 can prevent the connection part 21 from retreating and rotating, and the matching opening and closing part 22 can realize the effect of self-locking and fixing the positioning self-locking sleeve 2 in the rock.
Specifically, as shown in fig. 5, the connecting portion 21 has a ring-shaped structure, the connecting portion 21 has a gradually decreasing outer peripheral dimension in a direction away from the sectional type self-drilling anchor 1, and an inner wall thereof has a first internal thread 211, and the first internal thread 211 is engaged with an end of the sectional type self-drilling anchor 1. Spacing thorn 23 orientation deviates from the direction extension of portion 22 that opens and shuts, and the contained angle between the periphery wall of spacing thorn 23 and connecting portion 21 is the acute angle.
In some embodiments, as shown in fig. 5, the positioning self-locking sleeve 2 further includes a rubber locking cap 24, the rubber locking cap 24 is sleeved on an end portion of the opening and closing portion 22 away from the connecting portion 21, and the rubber locking cap 24 can prevent the opening and closing portion 22 from being opened in advance in the anchor rod installation process, so as to facilitate installation of the positioning self-locking sleeve 2.
The rubber locking cap 24 is made of rubber, and has good elasticity and low strength. The opening and closing part 22 can overcome the elasticity of the rubber to open the rubber locking cap 24 under the pushing of the sectional type self-drilling anchor rod 1.
The segmented self-drilling bolt 1 is described in detail below:
in some embodiments, as shown in fig. 6, the segmented self-drilling anchor rod 1 comprises a connector 11 and a plurality of sequentially threaded segmented joints 12, one segmented joint 12 at the end is in threaded connection with one end of the connector 11, and the other end of the connector 11 is in threaded connection with the positioning self-locking sleeve 2.
The end of the connection head 11 has a rod end thread 112 connected to the first internal thread 211, and the connection head 11 can expand the open/close portion 22 when screwed into the connection portion 21. When the anchor rod is installed, each section joint 12 can be installed in a section mode, the adaptability of the anchor rod to the depth of an anchoring hole under different working conditions is improved, the weakening of the cross section of the anchor rod is reduced as much as possible, and the strength of the section type self-drilling anchor rod 1 is guaranteed to the maximum extent.
The first annular elastoplastic body 3, the outer sleeve 4, the second annular elastoplastic body 5, the rotating sleeve 6, the third annular elastoplastic body 7 and the limiting assembly 8 are sleeved on the plurality of segment joints 12. According to the length of the segment joint 12, the first annular elastic-plastic body 3, the outer sleeve 4, the second annular elastic-plastic body 5, the rotating sleeve 6, the third annular elastic-plastic body 7 and the limiting component 8 can be sleeved on one segment joint 12, and can also be sleeved on two or even three segment joints 12.
In some embodiments, as shown in fig. 6, one end of the connector 11, which is in threaded connection with the positioning self-locking sleeve 2, is provided with a self-drilling bit 111 extending into the positioning self-locking sleeve 2, the self-drilling bit 111 is used for pushing the opening and closing part 22 to open, and after the opening and closing part 22 is opened, the self-drilling bit 111 can be allowed to continue drilling and the positioning self-locking sleeve 2 is prevented from continuing following.
The number of the section joints 12 can be two, three, four, five, etc., and preferably, two or three of the section joints 12 are adopted.
In some embodiments, as shown in fig. 7, to ensure structural stability of the segmented self-drilling bolt 1, the segmented joint 12 includes a rod 121, a male portion 122, a female portion 123, and a snap 124.
Wherein, the protruding portion 122 and the recessed portion 123 are respectively disposed at two ends of the rod member 121. In two adjacent segmented joints 12, the convex portion 122 of one segmented joint 12 extends into the concave portion 123 of the other segmented joint 12 and is in threaded connection with the concave portion 123. The protruding portion 122 of the segmented joint 12 near the joint 11 extends into the end of the joint 11 to be screwed with the joint 11.
The connection relation can ensure stable and quick connection between each section joint 12 and between the section joint 12 and the connector 11, and effectively improves the construction efficiency.
In addition, the outer surface of the concave portion 123 has a slot, the buckle 124 is connected to the end of the rod 121 where the convex portion 122 is located, and the buckle 124 is clamped with the slot on the adjacent segmented joint 12, or the buckle 124 is clamped with the outer surface of the end of the adjacent joint 11. The arrangement of the buckle 124 limits the relative rotation between the subsection joints 12 and the connectors 11, thereby not only realizing the subsection installation function of the sectional type self-drilling anchor rod 1, but also ensuring the overall strength of the sectional type self-drilling anchor rod 1.
The connection between the catch 124 and the rod 121 may be in a variety of ways. For example: the buckle 124 is fixedly connected with the rod piece 121 through a pin 125, and the buckle 124 can be bent and then clamped into the clamping groove; or the buckle 124 is pivotally connected to the rod 121 through the rotating shaft, and the buckle 124 can be clamped into the clamping groove after rotating a certain angle, and certainly, in order to ensure that the buckle 124 is in the unfolding state in the natural state, a torsion spring is installed between the buckle 124 and the rod 121. Of course, other connection manners may be adopted between the buckle 124 and the rod 121, and for brevity, the details are not described herein.
In addition, the snaps 124 are preferably arranged in three.
In at least one embodiment, the number of the clips 124 is three, and three corresponding slots are provided on the recessed portion 123 and the outer wall of the connecting head 11.
As shown in fig. 8, the outer wall of the rod member 121 is provided with a rotary thread 1211, and the rotary thread 1211 is used for connecting with the rotary sleeve 6 and the limiting assembly 8.
The rotary sleeve 6 is specifically explained below:
the detachable connection between the rotary sleeve 6 and the segmented self-drilling anchor rod 1 and between the rotary sleeve 6 and the outer sleeve 4 can be achieved in various ways, such as threaded connection, clamping connection and the like.
In some embodiments, as shown in fig. 9, 10 and 11, the inner surface of the rotating sleeve 6 has a rotating groove 61, the rotating groove 61 is connected with a rotating thread 1211 in one of the segmented joints 12 located outside the rock, the outer surface of the rotating sleeve 6 has a second thread 62, and the second thread 62 is in threaded connection with the inner surface of the outer sleeve 4.
Specifically, the longitudinal section of the rotating sleeve 6 is T-shaped.
In some embodiments, the thread on the inner surface of the rotating sleeve 6 has the same direction as the thread on the raised portion 122, so that when the rotating sleeve 6 is screwed onto the segmented self-drilling anchor rod 1, the segmented joints 12 in the segmented self-drilling anchor rod 1 are not disengaged, and the segmented joints 12 are not disengaged from the connecting head 11.
Similarly, the thread direction of the inner surface of the rotating sleeve 6 is the same as the thread direction of the rod end thread 112.
In some embodiments, the first annular elastoplastic body 3, the second annular elastoplastic body 5 and the third annular elastoplastic body 7 have different plasticity in order to ensure that the segmented high-deformation recoverable anchor rod has better absorption of energy released by surrounding rock deformation.
Specifically, the first annular elastoplast body 3 has a modulus of elasticity and a compression limit both greater than those of the second annular elastoplast body 5 and the third annular elastoplast body 7, the second annular elastoplast body 5 having a modulus of elasticity and a compression limit both greater than those of the third annular elastoplast body 7. When the second annular elastoplastic body 5 and the third annular elastoplastic body 7 reach the compression limit and are no longer deformed, the first annular elastoplastic body 3 can still assume the yielding function.
In some embodiments, the stop assembly 8 comprises a tray 81 and a stop nut 82, the tray 81 being interposed between the stop nut 82 and the third annular elastoplastic body 7, the stop nut 82 cooperating with the rotary thread 1211.
The use state of the sectional type large-deformation recoverable anchor rod is described in detail as follows:
when the surrounding rock is deformed, the limiting steel pricks 23 on the positioning self-locking sleeve 2 at the bottom of the first drilling section 9 are automatically locked to prevent the sectional type self-drilling anchor rod 1 from being pulled out. When the sliding force between the rod end thread 112 and the first internal thread 211 is smaller than the sliding friction force, the entire device is only elastically deformed. When the sliding force between the rod end thread 112 and the first internal thread 211 is greater than the sliding friction force, the sectional type self-drilling anchor rod 1 starts to rotate, the opening and closing part 22 is continuously opened, the self-drilling drill bit 111 advances in a rock body in a self-drilling manner, the anchoring force is continuously improved, meanwhile, the sectional type self-drilling anchor rod 1 drives the rotating sleeve 6 to rotate in the outer sleeve 4, and the first annular elastoplastomer 3, the second annular elastoplastomer 5 and the third annular elastoplastomer 7 are extruded to generate deformation absorption. The stability of the whole device is ensured by the energy released by the deformation of the surrounding rock.
When the surrounding rock is greatly deformed and the rod end thread 112 completely enters the positioning self-locking sleeve 2, the sectional self-drilling anchor rod 1 and the rotating sleeve 6 do not rotate any more, at the moment, the second annular elastoplastic body 5 and the third annular elastoplastic body 7 reach the compression limit, and the first annular elastoplastic body 3 can still continue to deform to bear yielding.
After the service life of the sectional type self-drilling anchor rod 1 is finished, the limiting nut 82 is firstly removed, then the sectional type self-drilling anchor rod 1 is rotated to be unlocked with the positioning self-locking sleeve 2, and the tray 81, the third annular elastoplastic body 7, the rotary sleeve 6, the second annular elastoplastic body 5, the outer sleeve 4 and the first annular elastoplastic body 3 are taken out to finish the recovery of the device.
The embodiment of the second aspect of the invention provides a use method of a sectional type large-deformation recoverable anchor rod, which is applied to the sectional type large-deformation recoverable anchor rod provided by the embodiment of the first aspect of the invention and comprises the following steps:
drilling a hole on the rock to form a drilling section 9, reaming one end of the drilling section 9 close to the rock surface to form a reaming section 10, and cleaning the drilling section 9 and the reaming section 10;
connecting the sectional self-drilling anchor rod 1 with the positioning self-locking sleeve 2;
pushing the positioning self-locking sleeve 2 to a specified position;
sequentially installing a first annular elastoplastomer 3, an outer sleeve 4, a second annular elastoplastomer 5 and a rotary sleeve 6 at the hole bottom of the reaming section 10, rotating the rotary sleeve 6 to connect the rotary sleeve 4, and then sequentially installing a third annular elastoplastomer 7 and a limiting assembly 8;
the sectional type self-drilling anchor rod 1 is rotated to enable the sectional type self-drilling anchor rod 1 to advance in the positioning self-locking sleeve 2, so that the positioning self-locking sleeve 2 is self-locked and fixed in the rock by means of the self structure, and pretightening force is applied to the rock.
The use method of the sectional type large-deformation recyclable anchor rod provided by the second scheme of the invention has the advantages of simple operation steps, strong applicability and easy popularization, and is suitable for the engineering fields of supporting and reinforcing of soft rock slopes, deep foundation pits, mine roadways, deep underground engineering and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The sectional type large-deformation recoverable anchor rod is characterized by comprising a sectional type self-drilling anchor rod (1) and a positioning self-locking sleeve (2) for self-locking and fixing in a rock, wherein the sectional type self-drilling anchor rod (1) is in threaded connection with the positioning self-locking sleeve (2), and the sectional type self-drilling anchor rod (1) is sequentially sleeved with a first annular elastoplastomer body (3), an outer sleeve (4), a second annular elastoplastomer body (5), a rotating sleeve (6), a third annular elastoplastomer body (7) and a limiting assembly (8) which are mutually abutted in the direction of gradually keeping away from the interior of the rock;
the outer sleeve (4) is used for being connected with the rock wall is dismantled, the internal surface of rotatory sleeve (6) with the connection can be dismantled in sectional type self-drilling stock (1), the surface of rotatory sleeve (6) with the internal surface of outer sleeve (4) can be dismantled and be connected, spacing subassembly (8) with the connection can be dismantled in sectional type self-drilling stock (1).
2. The segmented large-deformation recoverable anchor rod according to claim 1, wherein the positioning self-locking sleeve (2) comprises a connecting part (21), an opening and closing part (22) and a limiting steel thorn (23);
one end of the connecting part (21) is in threaded connection with the sectional type self-drilling anchor rod (1), the other end of the connecting part (21) is connected with the opening and closing part (22), and the opening and closing part (22) is used for being opened to abut against the rock under the pushing of the sectional type self-drilling anchor rod (1);
the limiting steel pricks (23) are distributed on the outer surface of the connecting part (21), and the limiting steel pricks (23) are used for limiting the position of the connecting part (21) relative to the rock.
3. The segmented large-deformation recoverable bolt according to claim 2, wherein the positioning self-locking sleeve (2) further comprises a rubber locking cap (24), and the rubber locking cap (24) is sleeved on the end of the opening and closing part (22) away from the connecting part (21).
4. The segmented large deformation recoverable bolt according to claim 1, characterized in that the segmented self drilling bolt (1) comprises a connector (11) and a plurality of sequentially threaded segmented joints (12), one of the segmented joints (12) at the end being in threaded connection with one end of the connector (11), the other end of the connector (11) being in threaded connection with the positioning self locking sleeve (2).
5. The segmented large deformation retrievable rock bolt of claim 4, characterised in that the segmented joint (12) comprises a rod (121), a male (122), a female (123) and a snap (124);
the convex part (122) and the concave part (123) are respectively arranged at two ends of the rod piece (121), the convex part (122) extends into the concave part (123) on the adjacent segmented joint (12) and is in threaded connection with the concave part (123), or the convex part (122) extends into the end part of the adjacent connector (11) and is in threaded connection with the connector (11);
the concave surface of establishing portion (123) has the draw-in groove, buckle (124) connect in member (121) are equipped with the protruding one end of establishing portion (122), buckle (124) and adjacent on segmentation joint (12) the draw-in groove joint, perhaps buckle (124) and adjacent the tip surface joint of connector (11).
6. The segmented large-deformation recoverable bolt according to claim 4, characterized in that the end of the connector (11) in threaded connection with the positioning self-locking sleeve (2) has a self-drilling bit (111) which extends into the positioning self-locking sleeve (2).
7. A segmented high deformation retrievable rock bolt according to claim 5, characterised in that the inner surface of the rotating sleeve (6) is threadedly connected to the rod (121) in one of the segmented joints (12) located outside the rock, and the outer surface of the rotating sleeve (6) is threadedly connected to the outer sleeve (4).
8. The segmented large deformation recoverable bolt according to claim 7, wherein the thread on the inner surface of the rotating sleeve (6) has the same direction of rotation as the thread on the raised portion (122).
9. A segmented large deformation recoverable bolt according to any of claims 1 to 8, wherein the plasticity of the first annular elastoplastic body (3), the second annular elastoplastic body (5) and the third annular elastoplastic body (7) is different.
10. A use method of a sectional type large deformation recoverable anchor rod, which is applied to the sectional type large deformation recoverable anchor rod according to any one of claims 1 to 9, and comprises the following steps:
drilling the rock to form a drilling section (9), reaming one end of the drilling section (9) close to the rock surface to form a reaming section (10), and cleaning the drilling section (9) and the reaming section (10);
connecting the sectional self-drilling anchor rod (1) with the positioning self-locking sleeve (2);
advancing the positioning self-locking sleeve (2) to a specified position;
sequentially mounting the first annular elastoplastomer (3), the outer sleeve (4), the second annular elastoplastomer (5) and the rotary sleeve (6) at the bottom of the hole of the reaming section (10), rotating the rotary sleeve (6) to connect the rotary sleeve with the outer sleeve (4), and sequentially mounting a third annular elastoplastomer (7) and the limiting assembly (8);
and rotating the sectional type self-drilling anchor rod (1) to enable the sectional type self-drilling anchor rod (1) to advance in the positioning self-locking sleeve (2), so that the positioning self-locking sleeve (2) is self-locked and fixed in the rock by means of a self structure, and the application of pre-tightening force is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049399.7A CN114382521B (en) | 2022-01-17 | 2022-01-17 | Sectional type large-deformation recyclable anchor rod and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049399.7A CN114382521B (en) | 2022-01-17 | 2022-01-17 | Sectional type large-deformation recyclable anchor rod and use method thereof |
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| CN114382521B true CN114382521B (en) | 2022-09-06 |
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|---|---|---|---|---|
| WO2007059580A1 (en) * | 2005-11-24 | 2007-05-31 | Peter Andrew Gray | Self drilling rock bolt |
| CN103133026A (en) * | 2013-03-26 | 2013-06-05 | 安徽理工大学 | Novel expansion shell inverted wedge type grouting anchor rod |
| CN111255493A (en) * | 2020-02-18 | 2020-06-09 | 太原理工大学 | Connectable extension anchor rod capable of achieving segmented anchoring and mounting device thereof |
| CN111456779A (en) * | 2020-04-13 | 2020-07-28 | 中国矿业大学 | Impact-resistant energy-absorbing yielding anchor cable anchoring device and method thereof |
| CN111472823A (en) * | 2020-04-14 | 2020-07-31 | 中国矿业大学 | Large-deformation quantitative yielding anchor rod device and using method thereof |
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2022
- 2022-01-17 CN CN202210049399.7A patent/CN114382521B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007059580A1 (en) * | 2005-11-24 | 2007-05-31 | Peter Andrew Gray | Self drilling rock bolt |
| CN103133026A (en) * | 2013-03-26 | 2013-06-05 | 安徽理工大学 | Novel expansion shell inverted wedge type grouting anchor rod |
| CN111255493A (en) * | 2020-02-18 | 2020-06-09 | 太原理工大学 | Connectable extension anchor rod capable of achieving segmented anchoring and mounting device thereof |
| CN111456779A (en) * | 2020-04-13 | 2020-07-28 | 中国矿业大学 | Impact-resistant energy-absorbing yielding anchor cable anchoring device and method thereof |
| CN111472823A (en) * | 2020-04-14 | 2020-07-31 | 中国矿业大学 | Large-deformation quantitative yielding anchor rod device and using method thereof |
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| CN114382521A (en) | 2022-04-22 |
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