CN112431625A - Embedded constant-resistance energy absorption device - Google Patents
Embedded constant-resistance energy absorption device Download PDFInfo
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- CN112431625A CN112431625A CN202011292581.2A CN202011292581A CN112431625A CN 112431625 A CN112431625 A CN 112431625A CN 202011292581 A CN202011292581 A CN 202011292581A CN 112431625 A CN112431625 A CN 112431625A
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- absorbing
- anchor rod
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 23
- 230000008093 supporting effect Effects 0.000 claims abstract description 64
- 238000005336 cracking Methods 0.000 claims abstract description 43
- 239000011435 rock Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 35
- 238000004873 anchoring Methods 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 230000002708 enhancing effect Effects 0.000 abstract description 7
- 239000006096 absorbing agent Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000003195 fascia Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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Images
Classifications
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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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
- E21D21/0093—Accessories
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to an embedded constant-resistance energy absorption device, which comprises an embedded supporting plate, a constant-resistance energy absorption component, a directional cracking gasket and a pre-tightening nut, wherein the embedded supporting plate is sleeved at the tail part of an anchor rod; the embedded supporting plate can transmit pre-tightening force applied to the anchor rod to the inside of the surrounding rock and can also transmit stress generated by deformation and damage of the surrounding rock to the anchor rod; the prefabricated grooves arranged on the constant-resistance energy-absorbing components vertically arranged are of a weak surface structure with constant breaking strength, so that the anchor rod (cable) can be guaranteed to provide constant supporting resistance to surrounding rocks in the whole supporting process, and the supporting effect of the anchor rod (cable) on deformation and damage of the surrounding rocks is greatly enhanced; the invention has the advantages of low cost, convenient processing and application and capability of obviously enhancing the supporting effect of the large-deformation roadway.
Description
Technical Field
The invention relates to the technical field of supporting engineering of mines, tunnels and the like, in particular to an embedded constant-resistance energy absorption device.
Background
Along with the recent resource exploitation and tunnel construction deep part, the stress of surrounding rock is remarkably increased, the deformation of the surrounding rock is remarkably increased, at the moment, supporting structures such as anchor rods with large deformation and yielding capacity are generally needed, and the supporting cost is undoubtedly remarkably increased due to the high production price of constant-resistance large-deformation anchor rods with good supporting effect; secondly, the existing anchoring devices with constant resistance and large deformation performance have shortcomings, and usually need to be additionally arranged at the tail part of an anchor rod and protrude out of the surface of surrounding rock, so that the tail part of the anchor rod leaks too long, the tail part of the anchor rod leaking too long increases the danger of the operating environment, and the related specifications also require that the leaking length cannot be too long, so that the deformation capacity of the devices is limited, and the anchoring devices cannot be well applied to supporting engineering under the condition of large-deformation surrounding rock; therefore, for enhancing the deformation and yielding capacity of the supporting structure and improving the control effect on the large-deformation roadway or tunnel surrounding rock, the embedded constant-resistance energy absorption device which is low in cost, convenient to process and apply and capable of remarkably enhancing the supporting effect of the large-deformation roadway is very necessary.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an embedded constant-resistance energy absorption device which is low in cost, convenient to process and apply and capable of obviously enhancing the supporting effect of a large-deformation roadway.
The purpose of the invention is realized as follows: the utility model provides an embedded constant resistance energy-absorbing device, it includes embedded layer board, constant resistance energy-absorbing component, directional crack gasket, pre-tightening nut that send, embedded layer board suit the afterbody at the stock, the inside vertical arrangement of embedded layer board has the constant resistance energy-absorbing component, directional crack gasket setting in the downside of the constant resistance energy-absorbing component in the outside, pre-tightening nut compress tightly the downside that sets up at directional crack gasket and threaded connection is on the stock.
The embedded layer board include arch layer board cap, constant resistance energy-absorbing component installation cavity, baffle and stock through-hole, the shape of arch layer board cap is the arch curved surface form, arch layer board cap compresses tightly the country rock department that sets up near anchor hole drill way, the embedding of constant resistance energy-absorbing component installation cavity is in the anchor hole, the pore wall in anchor hole is hugged closely to the outer wall of constant resistance energy-absorbing component installation cavity, the constant resistance energy-absorbing component install in constant resistance energy-absorbing component installation cavity, the one end that constant resistance energy-absorbing component installation cavity is close to arch layer board cap is opened, the other end of constant resistance energy-absorbing component installation cavity is provided with the baffle, is provided with the stock through-hole that is used for the stock to wear.
The constant-resistance energy-absorbing component comprises a sleeve, an inserting end, a matching end and a prefabricated groove, the two ends of the sleeve are respectively provided with the inserting end and the matching end, the prefabricated groove of a weak surface structure is uniformly arranged on the inner wall of the sleeve in advance, the inserting end is a sleeve wall of which the outer wall is milled, the matching end is a sleeve wall of which the inner wall is milled, the sum of the thicknesses of the inserting end and the matching end is the same as the wall thickness of the sleeve, and the adjacent constant-resistance energy-absorbing components are vertically arranged and combined in the matching end through the inserting end.
The baffle is provided with a limiting groove used for limiting the constant-resistance energy-absorbing member in the installation cavity of the constant-resistance energy-absorbing member, and the size of the limiting groove is matched with that of the matching end of the constant-resistance energy-absorbing member.
The axial length of the constant-resistance energy-absorbing members is 3-6cm, and the number of the constant-resistance energy-absorbing members is 3-8.
The directional cracking gasket comprises directional cracking teeth and a gasket curved surface structure, the number of the directional cracking teeth is the same as that of the prefabricated grooves of the constant-resistance energy-absorbing component, and the directional cracking teeth are compressed and aligned to be arranged in the prefabricated grooves through the pre-tightening nuts.
The pre-tightening nut comprises a pre-tightening nut cap, the pre-tightening nut cap is matched with a gasket curved surface structure of the directional cracking gasket, a pre-tightening nut internal thread is arranged inside the pre-tightening nut, and the pre-tightening nut internal thread is matched with the bolt body tail part thread of the anchor rod.
The use method of the embedded constant-resistance energy absorption device comprises the following steps:
step 1): drilling an anchoring hole for construction;
step 2): carrying out shallow reaming from the orifice of the anchor hole to form an anchor hole reaming section, wherein the length of the reaming is the same as the axial length of the mounting cavity of the constant-resistance energy-absorbing member, and the diameter of the reaming is the same as the diameter of the mounting cavity of the constant-resistance energy-absorbing member;
step 3): filling an anchoring agent cartridge into the anchoring hole, and driving the anchor rod to stir and mix the anchoring agent through a drilling machine to anchor the anchor rod;
step 4): the embedded supporting plate penetrates through the anchor rod through hole and is placed in the anchor hole expanding section to enable the arched supporting plate cap to be close to the surface of the surrounding rock;
step 5): sequentially sleeving the constant-resistance energy-absorbing member through the anchor rods in a mode that the inserting end is inserted into the matching end and then installing the constant-resistance energy-absorbing member into the installation cavity of the constant-resistance energy-absorbing member;
step 6): sleeving the positioning fracturing gasket on the anchor rod, and aligning the positioning fracturing teeth to the prefabricated grooves on the inner wall of the constant-resistance energy-absorbing member;
step 7): and (5) mounting a pre-tightening nut, and applying a pre-tightening force to complete anchor rod supporting construction.
The anchor rod can be replaced by an anchor cable or other supporting devices.
The invention has the beneficial effects that: according to the embedded constant-resistance energy absorption device, the embedded supporting plate is adopted, so that pre-tightening force applied to the anchor rod can be transmitted into surrounding rock, stress generated by deformation and damage of the surrounding rock can be transmitted to the anchor rod, and meanwhile, an installation space is provided for a constant-resistance energy absorption component; according to the invention, a plurality of vertically arranged constant-resistance energy-absorbing members are adopted, the constant-resistance energy-absorbing members are provided with the prefabricated grooves with weak surface structures, when the force reaches the breaking strength of the constant-resistance energy-absorbing members, the constant-resistance energy-absorbing members are broken from the positions of the prefabricated grooves, constant supporting resistance is provided for surrounding rocks in the whole process, and the supporting effect of the anchor rods on deformation and damage of the surrounding rocks is greatly enhanced; according to the invention, the directional cracking gasket and the pre-tightening nut are adopted, under the action of the pre-tightening nut, the directional cracking teeth of the directional cracking gasket can press the prefabricated groove of the constant-resistance energy-absorbing component, and the curved surface structure of the gasket of the directional cracking gasket is matched with the pre-tightening nut, so that the friction force in the pre-tightening force application process of the anchor rod can be reduced, and the pre-tightening force can be conveniently applied; the invention has the advantages of low cost, convenient processing and application and capability of obviously enhancing the supporting effect of the large-deformation roadway.
Drawings
Fig. 1 is a schematic diagram of an engineering application of an embedded constant-resistance energy absorber according to the present invention.
Fig. 2 is a schematic structural diagram of an embedded constant-resistance energy absorber according to the present invention.
FIG. 3 is a diagram of an arched fascia cap configuration for an embedded constant resistance energy absorber device of the present invention.
FIG. 4 is a cross-sectional view of an arched fascia cap of an embedded constant resistance energy absorber device of the present invention.
FIG. 5 is a top view of an arched fascia cap of an embedded constant resistance energy absorber device of the present invention.
FIG. 6 is a sleeve construction view of an embedded constant resistance energy absorber of the present invention.
FIG. 7 is a cross-sectional view of a sleeve of an embedded constant resistance energy absorber device of the present invention.
Fig. 8 is a structural view of an oriented crack pad of an embedded constant-resistance energy absorber according to the present invention.
Fig. 9 is a structure diagram of a pre-tightening nut of an embedded constant-resistance energy absorption device according to the present invention.
In the figure, the device comprises an embedded supporting plate 1, an embedded supporting plate 2, a constant-resistance energy-absorbing component 3, a directional cracking gasket 4, a pre-tightening nut 5, an arched supporting plate cap 6, a constant-resistance energy-absorbing component mounting cavity 7, a constant-resistance energy-absorbing component mounting cavity 8, an anchor rod through hole 9, a baffle plate 10, a limiting groove 11, a sleeve 12, a splicing end 13, a matching end 14, a prefabricated groove 15, directional cracking teeth 16, a gasket curved surface structure 17, a pre-tightening nut screw cap 18, a pre-tightening nut internal thread 19, an anchoring hole 20, an anchoring hole expanding section 21, an anchor rod 22, an anchoring rod body tail thread 23, an anchoring agent 24 and surrounding rock.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-9, an embedded constant-resistance energy-absorbing device comprises an embedded supporting plate 1, a constant-resistance energy-absorbing member 2, a directional cracking gasket 3 and a pre-tightening nut 4, wherein the embedded supporting plate 1 is sleeved at the tail of an anchor rod 21, the constant-resistance energy-absorbing member 2 is vertically arranged in the embedded supporting plate 1, the directional cracking gasket 3 is arranged at the lower side of the constant-resistance energy-absorbing member 2 at the outermost side, and the pre-tightening nut 4 is tightly pressed at the lower side of the directional cracking gasket 3 and is in threaded connection with the anchor rod 21.
The embedded supporting plate 1 comprises an arched supporting plate cap 5, a constant-resistance energy-absorbing member installation cavity 6, a constant-resistance energy-absorbing member installation cavity 7, a baffle 9 and an anchor rod through hole 8, the arched supporting plate cap 5 is in an arched curved surface shape, the arched supporting plate cap 5 is tightly pressed on a surrounding rock 24 near an orifice of an anchoring hole 19, pretightening force applied to the anchor rod 21 can be transmitted into the surrounding rock 24, meanwhile, stress generated by deformation and damage of the surrounding rock 24 can be transmitted to the anchor rod 21, the constant-resistance energy-absorbing member installation cavity 6 is embedded into the anchoring hole 19, the outer wall of the constant-resistance energy-absorbing member installation cavity 6 is tightly attached to the hole wall of the anchoring hole 19, the constant-resistance energy-absorbing member 2 is installed in the constant-resistance energy-absorbing member installation cavity 7, one end, close to the arched supporting plate cap 5, of the constant-resistance energy-absorbing member installation cavity 7 is opened, the other end of the constant-resistance energy-, the baffle 9 is provided with an anchor rod through hole 8 for the anchor rod 21 to penetrate through.
Constant resistance energy-absorbing component 2 include sleeve 11, grafting end 12, cooperation end 13 and prefabricated recess 14, the both ends of sleeve 11 are provided with grafting end 12 and cooperation end 13 respectively, evenly be provided with the prefabricated recess 14 of weak face structure on the inner wall of sleeve 11 in advance, from prefabricated recess 14 position department when guaranteeing constant resistance energy-absorbing component 2 destruction to destroy, grafting end 12 is the outer wall through the sleeve wall of milling, cooperation end 13 is the sleeve wall of inner wall through milling, the thickness sum of grafting end 12 and cooperation end 13 is the same with sleeve 11's wall thickness, adjacent constant resistance energy-absorbing component 2 inserts the interior vertical permutation and combination of cooperation end 13 through grafting end 12, realize the mutually supporting of a plurality of constant resistance energy-absorbing components 2.
The baffle 9 is provided with a limiting groove 10 for limiting the constant-resistance energy-absorbing member 2 in the constant-resistance energy-absorbing member installation cavity 7, the size of the limiting groove 10 is matched with that of the matching end 13 of the constant-resistance energy-absorbing member 2, the installed constant-resistance energy-absorbing member 2 and the constant-resistance energy-absorbing member installation cavity 7 are coaxial, and the situation that the position 2 of the constant-resistance energy-absorbing member is eccentric and the action effect of the constant-resistance energy-absorbing member is influenced is guaranteed.
The directional cracking gasket 3 comprises directional cracking teeth 15 and a gasket curved surface structure 16, the number of the directional cracking teeth 15 is the same as that of the prefabricated grooves 14 of the constant-resistance energy-absorbing component 2, the number of the directional cracking teeth 15 is three in the embodiment, and the directional cracking teeth 15 are pressed by the pre-tightening nuts 4 and are aligned to be arranged in the prefabricated grooves 14.
The pre-tightening nut 4 comprises a pre-tightening nut cap 17, the pre-tightening nut cap 17 is matched with a gasket curved surface structure 16 of the directional cracking gasket 3, friction force between the pre-tightening force and the pre-tightening force can be reduced in the applying process of the pre-tightening force of the anchor rod 21, applying of the pre-tightening force is facilitated, a pre-tightening nut internal thread 18 is arranged inside the pre-tightening nut 4, the pre-tightening nut internal thread 18 is matched with an anchor rod body tail thread 22, the maximum outer diameter of the pre-tightening nut 4 is smaller than the diameter of the constant-resistance energy-absorbing component mounting cavity 7, the pre-tightening nut 4 can enter the constant-resistance energy-absorbing component mounting cavity 7 after the constant-resistance energy-absorbing.
According to the embedded constant-resistance energy absorption device, the embedded supporting plate 1 is adopted, so that pre-tightening force applied to the anchor rod 21 can be transmitted into the surrounding rock 24, stress generated by deformation and damage of the surrounding rock 24 can be transmitted to the anchor rod 21, and meanwhile, an installation space is provided for the constant-resistance energy absorption component 2; according to the invention, a plurality of vertically arranged constant-resistance energy-absorbing members 2 are adopted, the constant-resistance energy-absorbing members 2 are provided with the prefabricated grooves 14 with weak surface structures, when the force intensity reaches the breaking strength of the constant-resistance energy-absorbing members 2, the constant-resistance energy-absorbing members 2 are broken from the positions of the prefabricated grooves 14, constant supporting resistance is provided for surrounding rocks 24 in the whole process, and the supporting effect of the anchor rods 21 on the deformation and the breakage of the surrounding rocks 24 is greatly enhanced; according to the invention, the directional cracking gasket 3 and the pre-tightening nut 4 are adopted, under the action of the pre-tightening nut 4, the directional cracking teeth 15 of the directional cracking gasket 3 can press the prefabricated grooves 14 of the constant-resistance energy-absorbing component 2, and the gasket curved surface structure 16 of the directional cracking gasket 3 is matched with the pre-tightening nut 17, so that the friction force in the pre-tightening force application process of the anchor rod 21 can be reduced, and the pre-tightening force is convenient to apply; the invention has the advantages of low cost, convenient processing and application and capability of obviously enhancing the supporting effect of the large-deformation roadway.
Example 2
As shown in fig. 1-9, an embedded constant-resistance energy-absorbing device comprises an embedded supporting plate 1, a constant-resistance energy-absorbing member 2, a directional cracking gasket 3 and a pre-tightening nut 4, wherein the embedded supporting plate 1 is sleeved at the tail of an anchor rod 21, the constant-resistance energy-absorbing member 2 is vertically arranged in the embedded supporting plate 1, the directional cracking gasket 3 is arranged at the lower side of the constant-resistance energy-absorbing member 2 at the outermost side, and the pre-tightening nut 4 is tightly pressed at the lower side of the directional cracking gasket 3 and is in threaded connection with the anchor rod 21.
The embedded supporting plate 1 comprises an arched supporting plate cap 5, a constant-resistance energy-absorbing member installation cavity 6, a constant-resistance energy-absorbing member installation cavity 7, a baffle 9 and an anchor rod through hole 8, the arched supporting plate cap 5 is in an arched curved surface shape, the arched supporting plate cap 5 is tightly pressed on a surrounding rock 24 near an orifice of an anchoring hole 19, pretightening force applied to the anchor rod 21 can be transmitted into the surrounding rock 24, meanwhile, stress generated by deformation and damage of the surrounding rock 24 can be transmitted to the anchor rod 21, the constant-resistance energy-absorbing member installation cavity 6 is embedded into the anchoring hole 19, the outer wall of the constant-resistance energy-absorbing member installation cavity 6 is tightly attached to the hole wall of the anchoring hole 19, the constant-resistance energy-absorbing member 2 is installed in the constant-resistance energy-absorbing member installation cavity 7, one end, close to the arched supporting plate cap 5, of the constant-resistance energy-absorbing member installation cavity 7 is opened, the other end of the constant-resistance energy-, the baffle 9 is provided with an anchor rod through hole 8 for the anchor rod 21 to penetrate through.
Constant resistance energy-absorbing component 2 include sleeve 11, grafting end 12, cooperation end 13 and prefabricated recess 14, the both ends of sleeve 11 are provided with grafting end 12 and cooperation end 13 respectively, evenly be provided with the prefabricated recess 14 of weak face structure on the inner wall of sleeve 11 in advance, from prefabricated recess 14 position department when guaranteeing constant resistance energy-absorbing component 2 destruction to destroy, grafting end 12 is the outer wall through the sleeve wall of milling, cooperation end 13 is the sleeve wall of inner wall through milling, the thickness sum of grafting end 12 and cooperation end 13 is the same with sleeve 11's wall thickness, adjacent constant resistance energy-absorbing component 2 inserts the interior vertical permutation and combination of cooperation end 13 through grafting end 12, realize the mutually supporting of a plurality of constant resistance energy-absorbing components 2.
The baffle 9 is provided with a limiting groove 10 for limiting the constant-resistance energy-absorbing member 2 in the constant-resistance energy-absorbing member installation cavity 7, the size of the limiting groove 10 is matched with that of the matching end 13 of the constant-resistance energy-absorbing member 2, the installed constant-resistance energy-absorbing member 2 and the constant-resistance energy-absorbing member installation cavity 7 are coaxial, and the situation that the position 2 of the constant-resistance energy-absorbing member is eccentric and the action effect of the constant-resistance energy-absorbing member is influenced is guaranteed.
The axial length of the constant-resistance energy-absorbing member 2 is 3-6cm, the constant-resistance energy-absorbing member 2 can be damaged and fall off, meanwhile, the constant-resistance performance of the constant-resistance energy-absorbing member 2 can be prevented from being influenced by overlarge axial size of the constant-resistance energy-absorbing member 2, and the number of the constant-resistance energy-absorbing members 2 is 3-8.
The directional cracking gasket 3 comprises directional cracking teeth 15 and a gasket curved surface structure 16, the number of the directional cracking teeth 15 is the same as that of the prefabricated grooves 14 of the constant-resistance energy-absorbing component 2, and the directional cracking teeth 15 are pressed and aligned in the prefabricated grooves 14 through the pre-tightening nuts 4.
The pre-tightening nut 4 comprises a pre-tightening nut cap 17, the pre-tightening nut cap 17 is matched with a gasket curved surface structure 16 of the directional cracking gasket 3, friction force between the pre-tightening force and the pre-tightening force can be reduced in the applying process of the pre-tightening force of the anchor rod 21, applying of the pre-tightening force is facilitated, a pre-tightening nut internal thread 18 is arranged inside the pre-tightening nut 4, the pre-tightening nut internal thread 18 is matched with an anchor rod body tail thread 22, the maximum outer diameter of the pre-tightening nut 4 is smaller than the diameter of the constant-resistance energy-absorbing component mounting cavity 7, the pre-tightening nut 4 can enter the constant-resistance energy-absorbing component mounting cavity 7 after the constant-resistance energy-absorbing.
The use method of the embedded constant-resistance energy absorption device comprises the following steps:
step 1): drilling an anchoring hole 19;
step 2): shallow reaming is carried out from the orifice of the anchor hole 19 to form an anchor hole reaming section 20, the length of the reaming is the same as the axial length of the constant-resistance energy-absorbing member mounting cavity 6, and the diameter of the reaming is the same as the diameter of the constant-resistance energy-absorbing member mounting cavity 6;
step 3): an anchoring agent cartridge is plugged into the anchoring hole 19, and the anchor rod 21 is driven by a drilling machine to stir and mix the anchoring agent 23 so as to anchor the anchor rod 21;
step 4): the embedded supporting plate 1 penetrates through an anchor rod 21 through an anchor rod through hole 8 and is placed on the anchoring hole expanding section 20, so that the arched supporting plate cap 5 is close to the surface of the surrounding rock 24;
step 5): sequentially sleeving the constant-resistance energy-absorbing member 2 into the constant-resistance energy-absorbing member installation cavity 7 through the anchor rods 21 in a mode that the inserting end 12 is inserted into the matching end 13;
step 6): sleeving the positioning cracking gasket 3 on the anchor rod 21, and aligning the positioning cracking teeth 15 to the prefabricated grooves 14 on the inner wall of the constant-resistance energy-absorbing member 2;
step 7): and (4) installing a pretightening nut and applying pretightening force to complete the supporting construction of the anchor rod 21.
According to the embedded constant-resistance energy absorption device, the embedded supporting plate 1 is adopted, under the action of the embedded supporting plate 1, acting force generated by deformation and damage of the surrounding rock 24 is transmitted to the anchor rod 21 from the surrounding rock 24, and as the anchor rod 21 is anchored in a stable rock stratum under the bonding action of the anchoring agent 23, the anchor rod 21 has the tendency of relative movement towards the inside of the surrounding rock 24; the invention adopts the constant-resistance energy-absorbing member 2 with higher strength, the constant-resistance energy-absorbing member 2 is sleeved in the embedded supporting plate 1 positioned at the tail part of the anchor rod 21, when the force reaches the breaking strength of the constant-resistance energy-absorbing member 2, the constant-resistance energy-absorbing member 2 is broken from the position of the prefabricated groove 14, when the prefabricated groove 14 of one constant-resistance energy-absorbing member 2 is broken and automatically separated, the adjacent constant-resistance energy-absorbing member 2 bears the function of breaking and energy-absorbing, and the operation is repeated until all the constant-resistance energy-absorbing members 2 are broken and separated, constant supporting resistance is provided for the surrounding rock 24 in the whole process, and the supporting effect of the anchor rod 21 on the deformation and damage of the surrounding rock 24 is greatly enhanced; the invention has the advantages of low cost, convenient processing and application and capability of obviously enhancing the supporting effect of the large-deformation roadway.
The size, number and the like of the embedded supporting plate, the constant-resistance energy-absorbing member and other structures are not limited to the parameters, and can be processed and adjusted according to specific needs, and any modification, equivalent replacement or improvement made within the principle of the invention shall be included in the protection scope of the invention.
Claims (9)
1. The utility model provides an embedded constant resistance energy-absorbing device which characterized in that: the energy-absorbing anchor rod comprises an embedded supporting plate, a constant-resistance energy-absorbing component, a directional cracking gasket and a pre-tightening nut, wherein the embedded supporting plate is sleeved at the tail of the anchor rod, the constant-resistance energy-absorbing component is vertically arranged in the embedded supporting plate, the directional cracking gasket is arranged on the lower side of the constant-resistance energy-absorbing component on the outermost side, and the pre-tightening nut is tightly pressed on the lower side of the directional cracking gasket and is in threaded connection with the anchor rod.
2. The embedded constant-resistance energy absorption device according to claim 1, wherein: the embedded layer board include arch layer board cap, constant resistance energy-absorbing component installation cavity, baffle and stock through-hole, the shape of arch layer board cap is the arch curved surface form, arch layer board cap compresses tightly the country rock department that sets up near anchor hole drill way, the embedding of constant resistance energy-absorbing component installation cavity is in the anchor hole, the pore wall in anchor hole is hugged closely to the outer wall of constant resistance energy-absorbing component installation cavity, the constant resistance energy-absorbing component install in constant resistance energy-absorbing component installation cavity, the one end that constant resistance energy-absorbing component installation cavity is close to arch layer board cap is opened, the other end of constant resistance energy-absorbing component installation cavity is provided with the baffle, is provided with the stock through-hole that is used for the stock to wear.
3. The embedded constant-resistance energy absorption device according to claim 1, wherein: the constant-resistance energy-absorbing component comprises a sleeve, an inserting end, a matching end and a prefabricated groove, the two ends of the sleeve are respectively provided with the inserting end and the matching end, the prefabricated groove of a weak surface structure is uniformly arranged on the inner wall of the sleeve in advance, the inserting end is a sleeve wall of which the outer wall is milled, the matching end is a sleeve wall of which the inner wall is milled, the sum of the thicknesses of the inserting end and the matching end is the same as the wall thickness of the sleeve, and the adjacent constant-resistance energy-absorbing components are vertically arranged and combined in the matching end through the inserting end.
4. The embedded constant-resistance energy absorption device according to claim 2, wherein: the baffle is provided with a limiting groove used for limiting the constant-resistance energy-absorbing member in the installation cavity of the constant-resistance energy-absorbing member, and the size of the limiting groove is matched with that of the matching end of the constant-resistance energy-absorbing member.
5. The embedded constant-resistance energy absorption device according to claim 1, wherein: the axial length of the constant-resistance energy-absorbing members is 3-6cm, and the number of the constant-resistance energy-absorbing members is 3-8.
6. The embedded constant-resistance energy absorption device according to claim 1, wherein: the directional cracking gasket comprises directional cracking teeth and a gasket curved surface structure, the number of the directional cracking teeth is the same as that of the prefabricated grooves of the constant-resistance energy-absorbing component, and the directional cracking teeth are compressed and aligned to be arranged in the prefabricated grooves through the pre-tightening nuts.
7. The embedded constant-resistance energy absorption device according to claim 1, wherein: the pre-tightening nut comprises a pre-tightening nut cap, the pre-tightening nut cap is matched with a gasket curved surface structure of the directional cracking gasket, a pre-tightening nut internal thread is arranged inside the pre-tightening nut, and the pre-tightening nut internal thread is matched with the bolt body tail part thread of the anchor rod.
8. The use method of the embedded constant-resistance energy absorption device according to claim 1, characterized in that: the method comprises the following steps:
step 1): drilling an anchoring hole for construction;
step 2): carrying out shallow reaming from the orifice of the anchor hole to form an anchor hole reaming section, wherein the length of the reaming is the same as the axial length of the mounting cavity of the constant-resistance energy-absorbing member, and the diameter of the reaming is the same as the diameter of the mounting cavity of the constant-resistance energy-absorbing member;
step 3): filling an anchoring agent cartridge into the anchoring hole, and driving the anchor rod to stir and mix the anchoring agent through a drilling machine to anchor the anchor rod;
step 4): the embedded supporting plate penetrates through the anchor rod through hole and is placed in the anchor hole expanding section to enable the arched supporting plate cap to be close to the surface of the surrounding rock;
step 5): sequentially sleeving the constant-resistance energy-absorbing member through the anchor rods in a mode that the inserting end is inserted into the matching end and then installing the constant-resistance energy-absorbing member into the installation cavity of the constant-resistance energy-absorbing member;
step 6): sleeving the positioning fracturing gasket on the anchor rod, and aligning the positioning fracturing teeth to the prefabricated grooves on the inner wall of the constant-resistance energy-absorbing member;
step 7): and (5) mounting a pre-tightening nut, and applying a pre-tightening force to complete anchor rod supporting construction.
9. An embedded constant-resistance energy absorption device according to claim 1 or 8, characterized in that: the anchor rod can be replaced by an anchor cable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011292581.2A CN112431625B (en) | 2020-11-18 | 2020-11-18 | Embedded constant-resistance energy absorption device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011292581.2A CN112431625B (en) | 2020-11-18 | 2020-11-18 | Embedded constant-resistance energy absorption device |
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| CN112431625A true CN112431625A (en) | 2021-03-02 |
| CN112431625B CN112431625B (en) | 2022-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934799A (en) * | 2022-07-26 | 2022-08-23 | 华北科技学院(中国煤矿安全技术培训中心) | Resistance-adjustable constant-resistance energy-absorbing anchor rod and using method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN205778962U (en) * | 2016-05-09 | 2016-12-07 | 辽宁工程技术大学 | A kind of constant-resistance pressure-relieving achor bar |
| CN111456784A (en) * | 2020-04-20 | 2020-07-28 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
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2020
- 2020-11-18 CN CN202011292581.2A patent/CN112431625B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN205778962U (en) * | 2016-05-09 | 2016-12-07 | 辽宁工程技术大学 | A kind of constant-resistance pressure-relieving achor bar |
| CN111456784A (en) * | 2020-04-20 | 2020-07-28 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934799A (en) * | 2022-07-26 | 2022-08-23 | 华北科技学院(中国煤矿安全技术培训中心) | Resistance-adjustable constant-resistance energy-absorbing anchor rod and using method thereof |
| CN114934799B (en) * | 2022-07-26 | 2022-10-04 | 华北科技学院(中国煤矿安全技术培训中心) | Resistance-adjustable constant-resistance energy-absorbing anchor rod and using method thereof |
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| CN112431625B (en) | 2022-10-28 |
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