CN114542149A - Underground roadway rock burst prevention supporting anchor cable - Google Patents
Underground roadway rock burst prevention supporting anchor cable Download PDFInfo
- Publication number
- CN114542149A CN114542149A CN202210447899.6A CN202210447899A CN114542149A CN 114542149 A CN114542149 A CN 114542149A CN 202210447899 A CN202210447899 A CN 202210447899A CN 114542149 A CN114542149 A CN 114542149A
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- Prior art keywords
- fixed
- anchor cable
- locking
- cylinder
- anchor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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 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
- E21D21/006—Anchoring-bolts made of cables or wires
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention discloses an underground roadway rock burst prevention support anchor cable which is used for intensively fixing a plurality of groups of anchor cables in a drill hole and an end fixing piece fixedly connected with the bottom of the left side of the drill hole; the device comprises a fixed cylinder embedded and coaxially fixed at the right end of a drill hole, a guide disc is coaxially embedded in a shell at the bottom of the left side of the fixed cylinder, the guide disc is in sealing connection with the fixed cylinder through a sealing gasket, a grouting box body is coaxially arranged at the disc surface of the right side of the guide disc, and the grouting box body is fixedly connected with the inner cylinder wall of the fixed cylinder through a J-shaped fixed plate; the energy-absorbing tensioning device is coaxially arranged in the fixed cylinder and comprises an energy-absorbing component for absorbing energy and tensioning the anchor cable axially and an inner tensioning component for radially tensioning and supporting; the outer tensioning assembly is coaxially arranged at the right end of the fixing barrel body, the right end of each group of anchor cables is separated, expanded and guided, and laid on the surface of the roadway, and the anchor cables corresponding to the adjacent drilled holes are connected and fixed through the adapting pressing fixing seat piece embedded into the inner wall of the roadway.
Description
Technical Field
The invention relates to the technical field of mining support, in particular to an underground roadway rock burst prevention support anchor cable.
Background
The rock mass is stretched by the anchor cable supporting structure, so that the elastic deformation potential energy instantaneously released by the rock mass is absorbed and resisted. In the conventional anchor cable supporting device, the structure is simple, the tensile strength of the support is reduced, the tensioning and adjusting performance of the anchor cable is poor, the anchor cable is easy to break and is loosened from the bottom of a drill hole, so that the absorption and the resisting strength of elastic deformation potential energy are low, and the stabilizing effect on a rock body is poor.
Accordingly, one skilled in the art provides a method of protecting a bolt in a downhole roadway against impact ground pressure to solve the problems set forth above in the background.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an underground roadway rock burst prevention supports anchor rope which characterized in that: it includes:
the anchor cables are multiple groups and are used for being fixed in the drill hole in a centralized mode;
the bottom of the left side of the drill hole is fixedly connected with an end fixing piece;
the grouting device comprises a fixed cylinder embedded and coaxially fixed at the right end of a drill hole, a guide disc is coaxially embedded in a shell at the bottom of the left side of the fixed cylinder, the guide disc is in sealing connection with the fixed cylinder through a sealing gasket, a grouting box body is coaxially arranged on the disc surface of the right side of the guide disc, and the grouting box body is fixedly connected with the inner cylinder wall of the fixed cylinder through a J-shaped fixed plate;
the energy-absorbing tensioning device is coaxially arranged in the fixed cylinder body and comprises an energy-absorbing component for absorbing energy and tensioning the anchor cable axially and an inner tensioning component for radially tensioning the support;
the outer tensioning assembly is coaxially arranged at the right end of the fixing barrel body, the right end of each group of anchor cables is separated, expanded and guided, and laid on the surface of the roadway, and the anchor cables corresponding to the adjacent drilled holes are connected and fixed through the adapting pressing fixing seat piece embedded into the inner wall of the roadway.
As a preferable technical scheme of the invention, the anchor cable part penetrating through the energy absorption assembly and the right end of the inner tensioning assembly is a profile anchor cable, and the profile anchor cable is guided into the outer tensioning assembly and has larger flexibility.
As a preferred technical solution of the present invention, the number of the anchor cables fixedly installed on the end fixing member in a concentrated manner is set to seven groups, six groups of the anchor cables are arranged outside in an equilateral hexagon, and a group of the anchor cables is arranged at the axis.
As a preferred aspect of the present invention, the energy absorber assembly includes:
the connecting ring cylinders are axially and equidistantly arranged and are internally embedded and fixed with locking cylinder pieces, each locking cylinder piece corresponds to each group of anchor cables one by one and locks and fixes the anchor cables, the outer ring walls of the connecting ring cylinders are fixed with connecting seats which are circumferentially arranged, the axially adjacent connecting seats are hinged and connected through splayed expansion and contraction rod pieces, and the top ends of expansion and contraction angles of each group of splayed expansion and contraction rod pieces are provided with clamping plate seats;
and a plurality of groups of annular clamping grooves are axially and tightly arranged on the inner wall of the fixed cylinder body, and the annular clamping grooves are correspondingly attached and clamped with the clamping plate seat.
As a preferable aspect of the present invention, the locking cylinder includes:
the left end part and the right end part of the locking cylinder are coaxially fixed with a connecting cylinder, and an elastic sliding net rack with a ring cylindrical structure is filled in the connecting cylinder;
the locking rods are hinged with a plurality of groups of locking rods which are linearly arranged in the axial direction and a plurality of groups of locking rods which are circumferentially arranged in the radial direction along the inner cylinder wall of the locking cylinder, the locking rods are all obliquely arranged towards one side of the surface of the roadway, each group of locking rods which are in the same axial plane and adjacent to each other are all connected through an inner extension spring, and the locking rods which are positioned at the leftmost end part and the rightmost end part of each group of locking rods in the same axial plane are all hinged with the corresponding left inner wall and the right inner wall of the locking cylinder through compression elastic rods;
the cable anchor is characterized in that the cable anchor is a rough anti-slip sleeve which is of a cylindrical structure and is sleeved on the outer wall of the anchor cable, the outer side wall of the rough anti-slip sleeve is fixedly provided with slip limiting rings which are arranged in an axial linear mode, the adjacent slip limiting rings and the locking rods are arranged alternately, and the annular surface of each slip limiting ring is an inclined annular surface.
As a preferable technical scheme of the invention, locking ring sheets are embedded on the rough anti-slip sleeves corresponding to the slip limiting rings.
As a preferable technical scheme of the invention, the inclined included angle between the slip limiting ring and the horizontal plane and the inclined included angle between the locking rod and the horizontal plane are 60 degrees.
As a preferred aspect of the present invention, the internal tension assembly includes:
the outer side of one end, far away from the clamping plate seat, of the T-shaped telescopic rod seat is sleeved with a slidable linking sliding ring, the upper end of the linking sliding ring is linked and connected with the lower end face of the sliding sleeve seat through a compression spring, and the left side and the right side of the guide disc II are symmetrically provided with a guide disc I sleeved outside the anchor cable;
the fixed seats are arranged into a plurality of groups, are respectively arranged in the middle of the inclined elastic rod in the splayed expansion rod piece and outside the first guide disc and are arranged in a circumferential arrangement manner, and are connected with the outer ring wall of the sliding ring and are arranged in a bilateral symmetry manner;
the first connecting rods are arranged into a plurality of groups, and the fixed seat on each group of inclined elastic rods is hinged with the fixed seat on the first guide disc on the corresponding side of the inclined elastic rod;
the second connecting rods are configured into a plurality of groups, and the fixing seats on the first guide disc are hinged with the fixing seats on the same plane and the same side of the first guide disc respectively;
the guide rods are arranged into a plurality of groups and penetrate through the first guide disc and the second guide disc in sliding connection, and the left end and the right end of each guide rod are embedded into the corresponding connecting cylinder on the corresponding side and are connected with the elastic sliding net rack.
As a preferred aspect of the present invention, the external tension assembly includes:
the hydraulic rods are arranged in a circumferential manner, a hexagonal guide frame is fixed at the output end of the right side of the hydraulic rods, a rotary tensioning wheel disc is arranged in the middle of the hexagonal guide frame, a fixed column for locking and fixing an axial anchor rope is installed on the tensioning wheel disc and close to the outer diameter of the fixed cylinder, a winding column for winding the axial anchor rope is installed at the inner diameter of the tensioning wheel disc, retention card cavities which are arranged in a circumferential manner are formed in the corresponding positions of the tensioning wheel disc and the hexagonal guide frame, and the radii of the retention card cavities and the fixed column are the same;
and the right end part of the fixed cylinder body and the hexagonal end part of the hexagonal guide frame are respectively provided with a pressing wheel set, the pressing wheel sets correspond to each group of anchor cables one to one, and the anchor cables are guided and clamped.
As a preferred technical scheme of the invention, the switching press-fixing seat pieces are arranged in a honeycomb-shaped equilateral hexagon and are used for connecting anchor cables led out from adjacent press wheel sets in the hexagonal guide frame and in the same plane in the same line and pressing and locking the anchor cables.
Compared with the prior art, the invention provides an underground roadway rock burst prevention support anchor cable, which has the following beneficial effects:
in the invention, the self-adaptive control structure is formed by combining the energy absorption component and the inner tensioning component in the energy absorption tensioning device, so that the forced stretching and retracting of the anchor cable are matched for buffering, energy absorption and tensioning, so that a safe and effective supporting effect is formed between the anchor cable and a rock body, the anchor cable in a well and the anchor cable on the surface of a roadway form an integrated stretching structure, the stress area of the surface of the roadway at one end of the fixed cylinder is increased, meanwhile, the situation that the pressure intensity of the area is forced to increase when the local smaller area of the surface of the roadway at one end of the fixed cylinder is subjected to the same tension force, the area is torn and the supporting point is collapsed is avoided, and a supporting frame body in a rhombic supporting shape is formed again by every two groups of splayed expansion and contraction rod pieces which are in central symmetry with the axial lead of the fixed cylinder, so that the stress uniformity and the controllable deformation of the supporting frame body are improved, therefore, elastic potential energy generated by stretching and pulling of the anchor cable in a better and more regular deformation adaptive mode is improved, the restoration capacity of the anchor cable is improved, and the anchor cable is prevented from being broken due to the fact that deformation quantity cannot follow the generation rate and the generation quantity of the elastic potential energy when the anchor cable is subjected to strong tensile force instantly.
Drawings
Fig. 1 is a schematic view of a support anchor cable structure according to the present invention;
FIG. 2 is an enlarged schematic view of a portion of the energy absorbing tensioner of the present invention;
FIG. 3 is a schematic view of the locking plate seat, a first connecting rod and a second connecting rod according to the present invention;
FIG. 4 is an enlarged view of the locking barrel of the present invention;
in the figure: 1. an end fixture; 2. an anchor cable; 21. a profile anchor cable; 3. fixing the cylinder; 4. a guide plate; 5. a gasket; 6. grouting the box body; 7. an energy-absorbing tensioner; 8. an energy absorbing assembly; 9. an inner tension assembly; 10. a hydraulic lever; 11. an outer tension assembly; 12. transferring and pressing the fixed seat piece; 13. a J-shaped fixing plate; 14. a pressing wheel group; 81. locking the barrel part; 82. connecting the ring cylinders; 83. a splayed expansion rod piece; 84. an outer extension spring; 85. a linking seat; 86. an annular neck; 87. a clamping plate seat; 91. a fixed seat; 92. a first guide disc; 93. a second guide disc; 94. a T-shaped telescopic rod seat; 95. a compression spring; 96. a first connecting rod; 97. a second connecting rod; 98. a guide bar; 111. a tensioning wheel disc; 112. fixing a column; 113. a winding connection column; 114. a retention clip cavity; 811. a locking cylinder; 812. a joining cylinder; 813. an elastic net frame; 814. a locking lever; 815. an inner tension spring; 816. compressing the elastic rod; 817. a rough anti-slip sleeve; 818. locking ring sheets; 819. the slip-limiting ring.
Detailed Description
Referring to fig. 1 to 4, the present invention provides a technical solution: an underground roadway rock burst prevention support anchor cable, comprising:
the anchor cables 2 are multiple groups, and are used for being intensively fixed in the drill hole; an end fixing piece 1 is fixedly connected to the bottom of the left side of the drill hole, a plurality of groups of anchor cables 2 are fixed in a concentrated mode through the end fixing piece 1, and then the end fixing piece 1 is conveyed to the bottom of the drill hole to be fixed with a rock stratum at the bottom of the drill hole;
the anchor cable fixing device comprises a fixing cylinder 3 embedded and coaxially fixed at the right end of a drill hole, a guide disc 4 is coaxially embedded in a left shell of the fixing cylinder 3, the guide disc 4 is in sealing connection with the fixing cylinder 3 through a sealing gasket 5, a grouting box body 6 is coaxially arranged on the right disc surface of the guide disc 4, the grouting box body 6 is in connection and fixation with the inner cylinder wall of the fixing cylinder 3 through a J-shaped fixing plate 13, and after the anchor cable 2 is fixed, solidification slurry is injected into the grouting box body 6, so that the anchor cable 2, the solidification slurry, the grouting box body 6, the J-shaped fixing plate 13 and the fixing cylinder 3 are in an integrated supporting structure;
the energy-absorbing tensioning device 7 is coaxially arranged inside the fixing cylinder 3, the energy-absorbing tensioning device 7 comprises an energy-absorbing component 8 for absorbing energy and tensioning the anchor rope 2 axially and an inner tensioning component 9 for radially tensioning and supporting, and the energy-absorbing component 8 and the inner tensioning component 9 are combined into a self-adaptive control structure, so that the tension and retraction generated by forcing the anchor rope 2 are matched for buffering, absorbing energy and tensioning, and a safe and effective supporting effect is formed between the anchor rope 2 and a rock body;
the coaxial outer tension assembly 11 of locating fixed barrel 3 right-hand member portion, the right-hand member portion to every group anchor rope 2 is separated and is expanded the direction outward and lay in the tunnel surface, and press solid seat spare 12 to link up fixedly through the switching of embedding tunnel inner wall with the anchor rope that corresponds in the adjacent drilling, thereby make anchor rope 2 stretch the structure with tunnel surface formation integral type inside the drilling, the increase is in the tunnel surface lifting surface area of fixed barrel 3 one end department, thereby avoid being located when the tunnel surface local less region of fixed barrel 3 one end department receives equal pulling force, thereby lead to the pressure in this region to be forced the increase, cause tearing and strut the subside of point to this region.
In this embodiment, the anchor cable portion penetrating through the energy absorbing assembly 8 and the right end of the inner tensioning assembly 9 is a profile anchor cable 21, and the profile anchor cable 21 is guided into the outer tensioning assembly 11 and has greater flexibility; thereby being convenient for lay the anchor rope on the surface of the roadway to form a supporting net.
In this embodiment, the number of the anchor cables 2 fixedly installed on the end fixing member 1 in a centralized manner is set to seven groups, six groups of the anchor cables are arranged outside in an equilateral hexagon, and a group of axis anchor cables is arranged in the axis, wherein the six groups of the anchor cables outside are used for spreading a supporting net on the surface of a roadway, and the axis anchor cables are used for fixing and pulling, so that the comprehensive supporting strength is further improved.
In this embodiment, the energy absorber assembly 8 includes:
three groups of linking ring cylinders 82 are axially and equidistantly arranged, locking cylinder pieces 81 are embedded and fixed in the linking ring cylinders 82, each locking cylinder piece 81 corresponds to each group of anchor cables 2 one by one and is locked and fixed to the anchor cables 2, linking seats 85 which are circumferentially arranged are fixed on the outer ring wall of each linking ring cylinder 82, axially adjacent linking seats 85 are hinged and connected through splayed expansion and contraction rod pieces 83, clamping plate seats 87 are installed at the top ends of expansion and contraction angles of each group of splayed expansion and contraction rod pieces 83, outer stretching springs 84 are installed on inclined elastic rod pieces in the splayed expansion and contraction rod pieces 83, and the outer stretching springs 84 are in stretching states at initial states, so that the splayed expansion and contraction rod pieces 83 have inward contraction trend acting forces to tighten the anchor cables; as a preferred embodiment, the initial included angle of the expansion and contraction angle of the splayed expansion and contraction rod member 83 is 120 °, and the number of the splayed expansion and contraction rod members 83 is even, so that every two groups of splayed expansion and contraction rod members 83 which are centrosymmetric with respect to the axis of the fixing cylinder 3 form a support frame body in a diamond support form again, and further the stress uniformity and deformation controllability of the support frame body are improved, thereby improving the elastic potential energy generated by adapting to the stretching of the anchor cable by better and more regular deformation, improving the restoration capability of the anchor cable, and avoiding the fracture of the anchor cable caused by the deformation quantity failing to follow the generation rate and the generation quantity of the elastic potential energy when the anchor cable is subjected to strong tensile force instantly;
a plurality of sets of annular clamping grooves 86 are formed in the inner wall of the fixed cylinder 3 in an axial direction, the annular clamping grooves 86 are correspondingly attached and clamped with the clamping plate seat 87, and the axial displacement of the clamping plate seat 87 is limited by the plurality of sets of annular clamping grooves 86 in the axial direction.
In this embodiment, the locking cylinder 81 includes:
a locking cylinder 811, the left and right ends of which are coaxially fixed with a connecting cylinder 812, the connecting cylinder 812 being filled with an elastic sliding net rack 813 with a ring-shaped structure;
the locking rods 814 which are axially linearly arranged in multiple groups and radially circumferentially arranged in multiple groups are hinged along the inner wall of the locking barrel 811, the locking rods 814 are all obliquely arranged towards one side of the surface of the roadway, the locking rods 814 which are axially in the same plane and adjacent to each other in each group are connected through an inner tension spring 815, and the locking rods 814 which are positioned at the leftmost end part and the rightmost end part in the axial same plane in each group are hinged with the corresponding left inner wall and the right inner wall of the locking barrel 811 through compression elastic rods 816;
the rough anti-slip sleeve 817 is of a cylindrical structure and is sleeved on the outer wall of the anchor cable 2, the slip limiting rings 819 which are axially and linearly arranged are fixed on the outer side wall of the rough anti-slip sleeve 817, the adjacent slip limiting rings 819 and the locking rod 814 are alternately arranged, and the annular surface of each slip limiting ring 819 is an inclined annular surface;
the outer end part of the locking rod 814 is spherical, so that after the locking rod 814 is contacted with the rough anti-skid sleeve 817, when the anchor cable drives the rough anti-skid sleeve 817 to move, the spherical surface of the end part of the locking rod 814 is in rotational sliding contact with the surface of the rough anti-skid sleeve 817, and further damage type contact caused by a plane friction mode is avoided, so that the reduction of the roughness coefficients of the locking rod 814 and the rough anti-skid sleeve 817 is avoided;
as a preferred embodiment, the rough anti-slip sleeve 817 is a wire barrel made of short steel wires twisted in a staggered manner, and is poured by solidified slurry, the diameter of the poured outer ring of the rough anti-slip sleeve 817 is slightly smaller than the outer diameter of the wire barrel so as to leave a wire head to form a rough surface so as to be in friction pressing with the spherical surface at the end part of the locking rod 814, and when the anchor cable is subjected to a large pulling force, the anchor cable has a displacement tendency of extending into the drilling direction, so that the pressing strength of the locking rod 814 on the rough anti-slip sleeve 817 is increased, the radial clamping strength of the anchor cable is synchronously improved, and the slip rate of the anchor cable is reduced.
In this embodiment, the locking ring 818 is embedded in each of the rough anti-slip sleeves 817 corresponding to the slip limiting rings 819, so as to improve the locking strength coaxial with the anchor cable and avoid dislocation and slippage.
In this embodiment, the angle between the slip-limiting ring 819 and the locking rod 814 and the horizontal plane is 60 °.
In this embodiment, the inner tension assembly 9 includes:
a second guide disc 93 which can axially slide is sleeved outside the anchor cable 2, a T-shaped telescopic rod seat 94 which can radially stretch and is fixedly arranged on the outer annular wall of the second guide disc 93 in a one-to-one correspondence manner with the position clamping plate seat 87 is fixed on the outer annular wall of the second guide disc 93, a sliding sleeve seat is arranged on the T-shaped telescopic rod seat 94, a slidable linking slide ring is sleeved outside one end, far away from the position clamping plate seat 87, of the T-shaped telescopic rod seat 94, the upper end of the linking slide ring is linked and connected with the lower end face of the sliding sleeve seat through a compression spring 95, a first guide disc 92 sleeved outside the anchor cable 2 is arranged on each of the left side and the right side of the second guide disc 93, and the first guide discs 92 are symmetrically arranged, so that a radially stretchable structure is formed, and the increase of the splayed expansion and contraction rod expansion angle caused when the anchor cable is stretched is avoided, so that the radial locking strength of the anchor cable is reduced;
the fixed seats 91 are arranged in multiple groups, are respectively arranged in the middle of the inclined elastic rod in the splayed expansion rod piece 83 and outside the first guide disc 92 and are arranged in a circumferential arrangement manner, and are connected with the outer ring wall of the sliding ring and are arranged in a bilateral symmetry manner;
the first connecting rods 96 are configured into a plurality of groups, and the fixed seat on each group of inclined elastic rods is hinged with the fixed seat on the first guide disc 92 on the corresponding side of the inclined elastic rod;
the second connecting rods 97 are configured into a plurality of groups, and are used for respectively hinging and connecting the fixed seat on the first guide disc 92 with the fixed seat 91 on the same plane and the same side of the first guide disc 92;
the guide rods 98 are arranged in multiple groups, penetrate through the first guide disc 92 and the second guide disc 93 and are connected in a sliding mode, and the left end and the right end of each guide rod 98 are embedded into the corresponding connecting cylinder 812 and are connected with the elastic sliding net rack 813;
through the transmission pushing of the second connecting rod 97 and the first connecting rod 96, the radial and axial locking strength of the anchor cable is enabled to be in a larger state in real time.
In this embodiment, the outer tension assembly 11 includes:
the hydraulic rods 10 are arranged in a circumferential manner, a hexagonal guide frame is fixed at the right-side output end of each hydraulic rod, a rotary tensioning wheel disc 111 is arranged in the middle of each hexagonal guide frame, a fixed column 112 for locking and fixing an axial anchor cable is mounted on the tensioning wheel disc 111 close to the outer diameter of the fixed barrel 3, a wrapping column 113 for wrapping the axial anchor cable is mounted on the inner diameter of the tensioning wheel disc 111, retention clamp cavities 114 are formed in the circumferential manner at corresponding positions of the tensioning wheel disc 111 and the hexagonal guide frame, and the radii of the retention clamp cavities and the fixed column 112 are the same; the anchor cable tension can be quickly regulated and controlled through the hydraulic rod 10, the anchor cable tension is simple and efficient, a gap formed between the anchor cable tension and the surface of the roadway is reserved, the surface of the roadway is enabled to form an anchor cable net area, the anchor cable in a drilled hole is buffered in a forced stretching mode, and the outline inclination angle of the outline anchor cable in the fixed cylinder 3 is 30 degrees;
and the right end part of the fixed cylinder 3 and the hexagonal end part of the hexagonal guide frame are respectively provided with a pressing wheel set 14, and the pressing wheel sets 14 correspond to each group of anchor cables one to one and guide and clamp the anchor cables.
In this embodiment, the adapting pressing and fixing seat members 12 are arranged in a honeycomb-shaped equilateral hexagon, and are used for joining, pressing, fixing and locking the anchor cables led out from the adjacent pressing wheel sets 14 in the hexagonal guide frame and in the same plane, so that the anchor cables in the drill holes and the anchor cable net on the surface of the roadway form an integral stress matching supporting structure, thereby improving the integral supporting strength of the anchor cable support.
In particular implementation, the method comprises the following steps:
s1: fixing a corresponding number of anchor cables on the end fixing piece, guiding the anchor cables into the drill hole, performing grouting fixation with the bottom of the drill hole, sequentially penetrating the outer side end of each anchor cable through the guide disc, the grouting box body and the energy-absorbing tensioning device, and performing tensioning fixation with the outer tensioning assembly;
s2: after the adjustment of the external tensioning component is finished, injecting solidification slurry into the grouting box body for solidification;
s3: the tensioning strength of the anchor cable on the right end side of the energy-absorbing tensioning device is regulated and controlled through the hydraulic rod, and meanwhile, the anchor cable on the surface of the roadway is fixedly collected through the transfer pressing fixing seat piece, so that the anchor cable on the surface of the roadway is made to be of a honeycomb-shaped hexagonal stretching structure, and the laying of the supporting anchor cable of the roadway is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention, and the technical solution and the inventive concept thereof should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides an underground roadway rock burst prevention supports anchor rope which characterized in that: it comprises the following steps:
the anchor cables (2) are multiple groups, and the anchor cables (2) are used for being intensively fixed in the drill hole;
the bottom of the left side of the drill hole is fixedly connected with an end fixing part (1);
the grouting device comprises a fixed cylinder (3) embedded and coaxially fixed at the right end of a drilling hole, a guide disc (4) is coaxially embedded in a left shell of the fixed cylinder (3), the guide disc (4) is hermetically connected with the fixed cylinder (3) through a sealing gasket (5), a grouting box body (6) is coaxially arranged on the right disc surface of the guide disc (4), and the grouting box body (6) is fixedly connected with the inner cylinder wall of the fixed cylinder (3) through a J-shaped fixing plate (13);
the energy-absorbing tensioning device (7) is coaxially arranged in the fixed cylinder body (3), and the energy-absorbing tensioning device (7) comprises an energy-absorbing assembly (8) for axially absorbing energy and tensioning the anchor cable (2) and an inner tensioning assembly (9) for radially tensioning and supporting;
the outer tensioning assembly (11) coaxially arranged at the right end part of the fixed cylinder body (3) separates the right end part of each group of anchor cables (2), expands the guide outwards and lays the anchor cables on the surface of a roadway, and the anchor cables corresponding to adjacent drill holes are connected and fixed through the adapting pressing fixed base piece (12) embedded into the inner wall of the roadway.
2. The underground roadway rock burst prevention support anchor cable of claim 1, wherein: the anchor cable part penetrating through the energy absorption assembly (8) and the right end of the inner tensioning assembly (9) is a profile anchor cable (21), and the profile anchor cable (21) is guided into the outer tensioning assembly (11) and has flexibility.
3. The underground roadway rock burst prevention support anchor cable of claim 1, wherein: the number of the anchor cables (2) which are fixedly installed on the end fixing piece (1) in a centralized mode is set to seven groups, six groups of the anchor cables are arranged outside in an equilateral hexagon mode, and a group of axis anchor cables are arranged on the axis.
4. The underground roadway rock burst prevention support anchor cable according to claim 1, wherein: the energy absorbing assembly (8) comprises:
the anchor cable connecting structure comprises three groups of connecting ring cylinders (82) which are axially arranged at equal intervals, locking cylinder pieces (81) are embedded and fixed in the connecting ring cylinders, each locking cylinder piece (81) corresponds to each group of anchor cables (2) one by one and is locked and fixed on the anchor cables (2), connecting seats (85) which are circumferentially arranged are fixed on the outer ring wall of each connecting ring cylinder (82), axially adjacent connecting seats (85) are hinged and connected through splayed expansion and contraction rod pieces (83), and clamping plate seats (87) are arranged at the top ends of expansion and contraction angles of each splayed expansion and contraction rod piece (83);
a plurality of groups of annular clamping grooves (86) are axially and tightly arranged on the inner wall of the fixed cylinder body (3), and the annular clamping grooves (86) are correspondingly attached and clamped with the clamping plate seat (87).
5. The underground roadway rock burst prevention support anchor cable as claimed in claim 4, wherein: the locking cartridge (81) comprises:
the locking device comprises a locking cylinder (811), wherein the left end and the right end of the locking cylinder are coaxially fixed with a connecting cylinder (812), and an elastic sliding net rack (813) with a ring-shaped structure is filled in the connecting cylinder (812);
the locking rods (814) which are axially and linearly arranged in multiple groups and radially and circumferentially arranged in multiple groups are hinged along the inner cylinder wall of the locking cylinder (811), the locking rods (814) are all obliquely arranged towards one side of the surface of the roadway, each group of locking rods (814) which are axially in the same plane and adjacent to each other are connected through an inner tension spring (815), and the locking rods (814) which are positioned at the leftmost end part and the rightmost end part of each group of locking rods (811) in the same axial plane are all hinged and connected with the corresponding left inner wall and the right inner wall of the locking cylinder (811) through compression elastic rods (816);
the anchor cable fixing device comprises a rough anti-slip sleeve (817) which is of a cylindrical structure and is sleeved on the outer wall of an anchor cable (2), wherein slide limiting rings (819) which are axially and linearly arranged are fixed on the outer side wall of the rough anti-slip sleeve (817), the adjacent slide limiting rings (819) and locking rods (814) are alternately arranged, and the annular surface of each slide limiting ring (819) is an inclined annular surface.
6. The underground roadway rock burst prevention support anchor cable of claim 5, wherein: locking ring sheets (818) are embedded in the rough anti-slip sleeves (817) corresponding to the slip limiting rings (819).
7. The underground roadway rock burst prevention support anchor cable of claim 5, wherein: the inclined included angle between the slip limiting ring (819) and the locking rod (814) and the horizontal plane is 60 degrees.
8. The underground roadway rock burst prevention support anchor cable of claim 5, wherein: the inner tensioning assembly (9) comprises:
a second guide disc (93) capable of axially sliding is sleeved outside the anchor cable (2), a T-shaped telescopic rod seat (94) capable of radially stretching and fixedly arranging corresponding to the clamping plate seat (87) one by one is fixed on the outer ring wall of the second guide disc (93), a sliding sleeve seat is arranged on the T-shaped telescopic rod seat (94), a slidable linking slide ring is sleeved outside one end, far away from the clamping plate seat (87), of the T-shaped telescopic rod seat (94), the upper end of the linking slide ring is linked and connected with the lower end face of the sliding sleeve seat through a compression spring (95), and a first guide disc (92) sleeved outside the anchor cable (2) is symmetrically arranged on the left side and the right side of the second guide disc (93);
the fixed seats (91) are arranged into a plurality of groups, are respectively arranged in the middle of the inclined elastic rod in the splayed expansion and contraction rod piece (83) and the outer part of the guide disc I (92) and are arranged in a circumferential arrangement manner, and are connected with the outer ring wall of the sliding ring and are arranged in a bilateral symmetry manner;
the first connecting rods (96) are configured into multiple groups, and the fixed seats on each group of inclined elastic rods are respectively hinged with the fixed seats on the corresponding side of the inclined elastic rods and positioned on the first guide disc (92);
the second connecting rods (97) are configured into a plurality of groups, and are used for respectively hinging and connecting the fixed seat positioned on the first guide disc (92) with the fixed seat (91) on the same plane and the same side of the first guide disc (92);
and the guide rods (98) are arranged into a plurality of groups, penetrate through the first guide disc (92) and the second guide disc (93) and are connected in a sliding mode, and the left end and the right end of each guide rod (98) are respectively embedded into the corresponding connecting cylinder (812) and are connected with the elastic sliding net rack (813).
9. The underground roadway rock burst prevention support anchor cable of claim 3, wherein: the outer tension assembly (11) comprises:
the hydraulic rods (10) are arranged in a circumferential manner, a hexagonal guide frame is fixed at the right-side output end of each hydraulic rod, a rotary tensioning wheel disc (111) is arranged in the middle of each hexagonal guide frame, a fixing column (112) for locking and fixing an axial anchor cable is arranged on the tensioning wheel disc (111) close to the outer diameter of the fixed barrel (3), a winding column (113) for winding the axial anchor cable is arranged on the inner diameter of the tensioning wheel disc (111), retention clamp cavities (114) are arranged in a circumferential manner and are arranged at corresponding positions of the tensioning wheel disc (111) and the hexagonal guide frame, and the radii of the retention clamp cavities (114) and the fixing columns (112) are the same;
and pressing wheel sets (14) are respectively arranged at the right end part of the fixed cylinder body (3) and the hexagonal end part of the hexagonal guide frame, and the pressing wheel sets (14) correspond to each group of anchor cables one to one and guide and clamp the anchor cables.
10. The rock burst prevention support anchor cable for the underground roadway according to claim 9, wherein: the switching pressing and fixing seat pieces (12) are arranged in a honeycomb-shaped equilateral hexagon and are used for connecting anchor cables led out from adjacent pressing wheel sets (14) which are positioned in the same plane in the hexagonal guide frame and are close to each other in the same plane in the same line and pressing, fixing and locking the anchor cables.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210447899.6A CN114542149A (en) | 2022-04-27 | 2022-04-27 | Underground roadway rock burst prevention supporting anchor cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210447899.6A CN114542149A (en) | 2022-04-27 | 2022-04-27 | Underground roadway rock burst prevention supporting anchor cable |
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