CN113187521A - Steel wire rope net hanging method based on yielding technology and auxiliary net hanging equipment - Google Patents
Steel wire rope net hanging method based on yielding technology and auxiliary net hanging equipment Download PDFInfo
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- CN113187521A CN113187521A CN202110369943.1A CN202110369943A CN113187521A CN 113187521 A CN113187521 A CN 113187521A CN 202110369943 A CN202110369943 A CN 202110369943A CN 113187521 A CN113187521 A CN 113187521A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title claims description 90
- 239000010959 steel Substances 0.000 title claims description 90
- 239000011435 rock Substances 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
- E21D11/406—Placing endless lining elements, e.g. from reels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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Abstract
The invention discloses a wire rope net hanging method and an auxiliary net hanging device based on yielding technology, wherein a homogeneous supporting ring body is constructed in a soft rock crushing area, the supporting ring body adopts multilayer high-strength anchor rods to be matched with a multi-spraying layer sealing layer, the multilayer high-strength anchor rods are uniformly placed in a roadway at different depths, each spraying layer is combined with the respective high-strength anchor rod, the outer end of each layer of high-strength anchor rod is hung with a mutually connected wire rope and sprayed with concrete to form the multi-spraying layer sealing layer, a relatively uniform rope net taking the wire rope as a rib is pressed under each layer of anchor rod pressure plate, discrete and scattered surrounding rocks are uniformly cemented through a multilayer tough concrete spraying layer structure highly closely attached to a rock surface, pressure stabilizing and retaining grouting are applied to uniformly cement the discrete and scattered surrounding rocks, the ring body with relatively uniform and greatly improved mechanical properties of the whole body is realized, and the combined density of the high-strength anchor rods in a unit rock body is increased, the range of the extrusion zone formed by the surrounding rock of the high-strength anchor rod is gradually reduced, and the minimum main stress in the extrusion zone is also gradually reduced.
Description
Technical Field
The invention relates to the technical field of roadway support, in particular to a wire rope net hanging method and auxiliary net hanging equipment based on a yielding technology.
Background
Along with the increase of the coal mining depth, the mine geological conditions become more complex, especially faults with different sizes cut, break and separate a well field, great difficulty is brought to mine mining, especially faults cause fracture section rock breakage, the difference of stress is increased, meanwhile, the fracture section is often communicated with water in a water-bearing layer in a coal seam top bottom plate to flow into the fracture section, so that the broken rock in the fracture section is transformed into argillization and even forms a water outlet channel, a plurality of difficulties are brought to normal construction of a mine, and in case of the condition that surrounding rock self-stability in soft, broken and discrete states is extremely poor, an anchor rod and a grouting anchor rod need to be uniformly implanted into the surrounding rock, a steel wire rope is used as a shin bone, the surrounding rock is constructed into a homogeneous supporting ring body through grouting and cementing reinforcement, and the whole bearing capacity of the surrounding rock is improved.
Disclosure of Invention
When the existing supporting mode faces surrounding rocks in soft, broken and discrete states, bedding, joints and faults in the surrounding rocks are difficult to be fully compacted, so that the strength of the surrounding rocks is insufficient, the steel wire net is hung in a manual mode, the consumed time is long, and the steel wire rope is difficult to be attached to the rock wall.
The technical scheme adopted by the invention is as follows:
a steel wire rope net hanging method based on yielding technology comprises the following steps:
a: after temporary support is carried out on a rough cross section formed after the excavation of the roadway, concrete needs to be sprayed for the first time, and the rock exposed on the working face is sprayed and sealed;
b: after primary spraying, driving a first-layer anchor rod into a rock body, wherein the row spacing between the anchor rods is 700 multiplied by 700mm, winding a steel wire rope around the anchor rod for one circle by using auxiliary net hanging equipment, fixing the steel wire rope at the tail end of the anchor rod, tightening the steel wire rope to be tightly attached to a layer surface, hanging the steel wire rope in sequence, mounting an anchor rod tray on the anchor rod, compacting the steel wire rope by using the anchor rod tray, fixing the anchor rod tray by using a nut, spraying grout for the second time, and covering the first-layer anchor rod to form a first-layer seal layer;
c: drilling second-level anchor rods, arranging the second-level anchor rods and the first-level anchor rods in a staggered mode, enabling the row spacing between the anchor rods to be 700 x 700mm, continuing to use auxiliary net hanging equipment to hang the steel wire rope, installing an anchor rod tray on the anchor rods, fixing the anchor rods by nuts, spraying cement for the third time, and covering the second-level anchor rods to form a second layer seal layer;
d: and (4) drilling a third-layer anchor rod, arranging the third-layer anchor rod, the first-layer anchor rod and the second-layer anchor rod in a staggered manner, hanging a steel wire rope by using auxiliary net hanging equipment, installing an anchor rod tray on the anchor rod, fixing the anchor rod tray by using a nut, spraying grout for the fourth time, and covering the third-layer anchor rod to form a third-layer seal layer.
Wherein, the same high-strength anchor rod of specification is all used to first level stock, second level stock and third level stock, different levels the degree of depth and the angle that the tunnel was put into to the high-strength anchor rod are all different, wire rope overlap joint length is not less than the stock interval to use two adjacent stocks of overlap joint as the standard, hang for the first time with hang for the second time the row spacing is 350mm X350 mm between the wire rope, hangs for the third time wire rope two are a set of, and the row spacing is 230mm X230 mm between two wire ropes of the same group, and the interval of every wire rope of group is 700mm, and hangs for the third time the wire rope is 115mm apart from the distance of the wire rope juncture that hangs for the first time and hang for the second time.
The invention also comprises a steel wire rope auxiliary net hanging device based on the yielding technology, which comprises a guide rail and a vehicle body, wherein the guide rail is installed at the bottom of a roadway, the vehicle body is arranged at the top of the guide rail, a rotating shaft is installed on the front surface of the vehicle body, an electric telescopic rod is installed on the side surface of the rotating shaft, an installation block is fixed at one end, far away from the rotating shaft, of the electric telescopic rod, an annular sliding groove and an insertion hole are formed in one side, facing the roadway, of the installation block, the insertion hole is located in a circular ring of the annular sliding groove, a rotating rod is installed inside the annular sliding groove, the rotating rod rotates around the annular sliding groove when working, the rotating rod has a telescopic function to adjust the length, a distance sensor is installed on the side surface of the installation block, and the distance sensor is used for detecting the distance from the installation block to the high-strength anchor rod.
The last surface mounting of installation piece has electronic slip table, L shape connecting rod is installed at the top of electronic slip table, solid fixed ring is installed to the one end that is close to the tunnel of L shape connecting rod, gu fixed ring is located the up end of dwang, reset spring, two are all installed to solid fixed ring's inner wall both sides reset spring's the one end of keeping away from solid fixed ring all is fixed with annular electromagnet.
The top of the vehicle body is provided with a support frame, the middle of the support frame is provided with a steel wire coil in a hanging mode, the outer side of the steel wire coil is wound with a steel wire rope, one end of the steel wire rope penetrates through the fixing ring, and the inner diameter of a ring formed by the annular electromagnets in the power-on working process is the same as the diameter of the steel wire rope.
The tail end of stock that excels in is provided with the stock tray, the through-hole has been seted up at the middle part of stock tray, the through-hole is used for the high-strength stock to insert, the tail end threaded connection of the stock that excels in has the nut to be used for fixed stock tray, the bulge that the middle part of stock tray had is used for fixed wire rope winding section.
The invention also comprises a use method of the steel wire rope auxiliary net hanging equipment based on the yielding technology, which comprises the following use steps:
1): the vehicle body moves to a position needing to hang a rope on the guide rail, stops at a proper position through a signal of the distance sensor, enables the installation block to be over against the high-strength anchor rod, enables a steel wire rope wound on a steel wire coil to penetrate through the fixing ring, and winds the steel wire rope on the high-strength anchor rod at the bottom of the roadway;
2): the starting motor drives the rotating shaft to rotate, the electric telescopic rod rotates to the next high-strength anchor rod, the high-strength anchor rod is aligned to the jack, the length of the electric telescopic rod is adjusted according to the change of the distance, the rotating rod is started to rotate in the annular sliding groove, meanwhile, the electric sliding table slides backwards, the fixing ring is driven to move backwards through the L-shaped connecting rod, and the rotating rod is convenient for winding the steel wire rope at the tail end of the high-strength anchor rod;
3): after the steel wire rope is wound, the rotating rod is contracted, the electric telescopic rod extends to enable the high-strength anchor rod to be inserted into the insertion hole, the steel wire rope wound on the high-strength anchor rod can be tightly attached to the inner wall of the roadway under the extrusion of the mounting block, the annular electromagnet is electrified to enable the annular electromagnet and the steel wire rope to be fixedly adsorbed, the steel wire rope is tensioned by the fixing ring in the process that the rotating shaft rotates towards the next high-strength anchor rod, then the annular electromagnet is powered off, and the annular electromagnet is pulled back to the original position by the reset spring;
4): repeating the steps, enabling the tail end of the high-strength anchor rod to be completely wound with the steel wire rope, aligning the through hole on the anchor rod tray to the high-strength anchor rod for mounting, fixing through the nut, enabling the winding section of the steel wire rope to be retracted into the protruding part of the anchor rod tray through tensioning of the auxiliary net hanging device, ensuring that the steel wire rope is tightly attached to the inner wall of the roadway, and improving the strength of the supporting layer.
Compared with the prior art, the invention has the following beneficial effects:
1. a homogeneous supporting ring body is constructed in a soft rock crushing area, the supporting ring body adopts multi-level high-strength anchor rods to be matched with a multi-spraying layer sealing layer, the multi-level high-strength anchor rods are uniformly placed in a roadway at different depths, each spraying layer is combined with a respective high-strength anchor rod, the outer end of each high-strength anchor rod is hung with a steel wire rope which is mutually connected and sprayed with concrete to form a multi-spraying layer sealing layer, a relatively uniform rope net taking steel wire ropes as tendons and bones is pressed under each layer of anchor rod pressure plate, and dispersed and scattered surrounding rocks are uniformly cemented by applying pressure stabilizing and pressure retaining grouting through a multi-layer tough concrete guniting layer structure highly closely attached to the rock surface, so that a supporting ring body with relatively uniform and greatly improved overall mechanical properties is realized, by increasing the combination density of the high-strength anchor rods in the unit rock body, the range of an extrusion zone formed by the surrounding rock of the high-strength anchor rods is gradually reduced, and the minimum main stress in the extrusion zone is also gradually reduced;
2. through the supplementary equipment of hanging net that sets up, the mode that hangs has replaced the manual work, a large amount of manpowers and time have been saved, and paste tight tunnel inner wall with wire rope, the intensity of supporting the layer has been improved, just to the stock that excels in through distance sensor control installation piece, start the dwang and make its at annular spout internal rotation, electronic slip table slides backward simultaneously, drive solid fixed ring retrodisplacement through L shape connecting rod, be convenient for the dwang with wire rope winding at the tail end of the stock that excels in, electric telescopic handle extension, the wire rope of winding on the stock that excels in, the extrusion that receives the installation piece can paste tight tunnel inner wall, circular electromagnet is electrified, it is fixed with wire rope absorption, in the rotation axis next pole pivoted in-process that excels in, gu fixed ring takes up wire rope, ensure that wire rope pastes tight tunnel inner wall, the intensity of a supporting layer has been improved.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a schematic structural diagram of the first screen hanging in the mine.
Fig. 3 is a schematic front view of the present invention in a mine.
Fig. 4 is a schematic cross-sectional view of the mounting block of the present invention.
Fig. 5 is another schematic cross-sectional view of the mounting block of the present invention.
Fig. 6 is a schematic view of the interior of the roadway after the work of the present invention is completed.
Fig. 7 is a cross-sectional schematic view of the anchor tray of the present invention.
In the figure: 1. a roadway; 2. a high-strength anchor rod; 3. a guide rail; 4. a vehicle body; 5. a support frame; 6. coiling the steel wire; 7. a rotating shaft; 8. an electric telescopic rod; 9. mounting blocks; 10. a distance sensor; 11. an annular chute; 12. rotating the rod; 13. a fixing ring; 14. a return spring; 15. an annular electromagnet; 16. a jack; 17. a wire rope; 18. an electric sliding table; 19. an L-shaped connecting rod; 20. an anchor rod tray; 21. a nut; 22. and a through hole.
Detailed Description
Example 1
As shown in fig. 1, a method for hanging a wire rope based on a yielding technology includes the following steps:
a: after temporary support is carried out on a rough cross section formed after excavation of the roadway (1), concrete needs to be sprayed for the first time, and the rock exposed on the working face is sprayed and sealed;
b: after primary spraying, a first-layer anchor rod is driven into a rock body, the row spacing between the anchor rods is 700 multiplied by 700mm, an auxiliary net hanging device is used for winding a steel wire rope (17) around the anchor rod for a circle, the steel wire rope (17) is fixed at the tail end of the anchor rod, the steel wire rope (17) is tightened to be tightly attached to the layer surface, the steel wire rope (17) is hung in sequence, an anchor rod tray (20) is installed on the anchor rod, after the steel wire rope (17) is tightly pressed and compacted by the anchor rod tray (20), the anchor rod tray (20) is fixed by a nut (21), secondary guniting is carried out, the first-layer anchor rod is covered, and a first-layer;
c: drilling second-level anchor rods, arranging the second-level anchor rods and the first-level anchor rods in a staggered mode, enabling the row spacing between the anchor rods to be 700 x 700mm, continuing to use auxiliary net hanging equipment to hang the steel wire ropes (17), installing an anchor rod tray (20) on the anchor rods, fixing the anchor rods by nuts (21), carrying out third-time guniting, and covering the second-level anchor rods to form a second-layer seal layer;
d: and (3) drilling a third-layer anchor rod, arranging the third-layer anchor rod and the first-layer anchor rod and the second-layer anchor rod in a staggered manner, hanging a steel wire rope (17) by using auxiliary net hanging equipment, installing an anchor rod tray (20) on the anchor rod, fixing the anchor rod tray by using a nut (21), spraying for the fourth time, covering the third-layer anchor rod, and forming a third-layer seal layer.
The first-level anchor rod, the second-level anchor rod and the third-level anchor rod all use high-strength anchor rods (2) with the same specification, the depth and the angle of the high-strength anchor rods (2) with different levels in a roadway (1) are different, the lap joint length of the steel wire ropes (17) is not less than the distance between the anchor rods, the two anchor rods which are adjacent in a lap joint mode are used as the standard, the row distance between the steel wire ropes (17) which are hung for the first time and the second time is 350mm multiplied by 350mm, the two steel wire ropes (17) which are hung for the third time are in one group, the row distance between the two steel wire ropes (17) in the same group is 230mm multiplied by 230mm, the distance between each steel wire rope (17) is 700mm, the distance between the steel wire rope (17) which is hung for the third time and the junction point of the steel wire ropes (17) which are hung for the first time and the second time is 115mm, the combination density of the high-strength anchor rods (2) in a unit rock body is increased by arranging the multi-level anchor rods, the distance between the high-strength anchor rods (2) is gradually increased, according to experience and relevant model tests, when the distance between the high-strength anchor rods (2) is smaller than 600mm, the surrounding rocks around the roadway (1) form a continuous extrusion zone, when the distance between the high-strength anchor rods (2) is 300-600 mm, the adjacent high-strength anchor rods (2) have obvious superposition action areas, from the mechanical point of view, the stress is the internal force acting on a unit area, the internal force is the force for resisting deformation generated among member molecules, as the density of the high-strength anchor rods (2) is increased, the sectional area of the high-strength anchor rods (2) is also increased in multiple, the stress acting on the high-strength anchor rods (2) is reduced in multiple, the function of the high-strength anchor rods (2) is more reflected, and simultaneously, as the combined density of the high-strength anchor rods (2) in a unit rock body is increased, the extrusion zones formed by the high-strength anchor rods (2) are fully and uniformly overlapped, so that the surrounding rock controlled by the periphery of the high-strength anchor rods (2) is highly and uniformly extruded, and the bedding, joints and faults in the surrounding rock are fully compacted under the cementing action of pressure stabilizing grouting to form a homogeneous surrounding rock ring body, and the strength of the surrounding rock is greatly improved.
By adopting the technical scheme: a homogeneous supporting ring body is constructed in a soft rock crushing area, the supporting ring body adopts multi-level high-strength anchor rods (2) to be matched with a multi-spraying layer sealing layer, the multi-level high-strength anchor rods (2) are uniformly placed into a roadway (1) at different depths, each spraying layer is combined with the respective high-strength anchor rods (2), the outer end of each high-strength anchor rod (2) is hung with a steel wire rope (17) which is mutually connected, concrete is sprayed to form the multi-spraying layer sealing layer, a relatively uniform rope net taking the steel wire rope (17) as a rib is pressed under each layer of anchor rod tray (20), discrete and scattered surrounding rocks are uniformly cemented through a multi-level tough concrete spraying layer structure which is highly and closely attached to a rock surface, pressure stabilizing and retention grouting are applied to uniformly cement the discrete and scattered surrounding rocks, the ring body with relatively uniform and greatly improved mechanical properties of the whole body is realized, and the combined density of the high-strength anchor rods (2) in a unit rock body is increased, the range of a compression zone formed by surrounding rocks of the high-strength anchor rod (2) is gradually reduced, and the minimum main stress in the compression zone is also gradually reduced.
Example 2
As shown in fig. 2-7, a wire rope auxiliary net hanging device based on yielding technology and a use method thereof, the wire rope auxiliary net hanging device comprises a guide rail (3) and a vehicle body (4) which are arranged at the bottom of a roadway (1), the vehicle body (4) is arranged at the top of the guide rail (3), a rotating shaft (7) is arranged on the front surface of the vehicle body (4), an electric telescopic rod (8) is arranged on the side surface of the rotating shaft (7), a mounting block (9) is fixed at one end of the electric telescopic rod (8) far away from the rotating shaft (7), an annular chute (11) and a jack (16) are arranged on one side of the mounting block (9) facing the roadway (1), the jack (16) is positioned in the annular of the annular chute (11), a rotating rod (12) is arranged inside the annular chute (11), the rotating rod (12) rotates around the annular chute (11) during working, the rotating rod (12) has a telescopic function to adjust the length, distance sensor (10) are installed to the side of installation piece (9), and distance sensor (10) are used for detecting the distance of installation piece (9) apart from high strength anchor rod (2), and the distance that high strength anchor rod (2) leaked outward is 30-50mm, and electric telescopic handle (8) its length of stretching out when twining wire rope (17) is greater than this distance, and length after electric telescopic handle (8) shrink is less than this distance when extrudeing one section after twining wire rope (17).
The upper surface mounting of installation piece (9) has electronic slip table (18), L shape connecting rod (19) are installed at the top of electronic slip table (18), solid fixed ring (13) are installed to the one end that is close to tunnel (1) of L shape connecting rod (19), gu fixed ring (13) are located the up end of dwang (12), reset spring (14) are all installed to the inner wall both sides of solid fixed ring (13), the one end of keeping away from solid fixed ring (13) of two reset spring (14) all is fixed with annular electromagnet (15).
Support frame (5) are installed at the top of automobile body (4), and the middle part of support frame (5) is hung and is installed steel wire book (6), and the outside winding of steel wire book (6) has wire rope (17), and solid fixed ring (13) are passed to the one end of wire rope (17), and its internal diameter of the ring that annular electromagnet (15) formed when circular telegram work is the same with wire rope (17) diameter, and the magnetism that annular electromagnet (15) produced after circular telegram is circular telegram can produce suction with between wire rope (17).
The tail end of stock (2) excels in is provided with stock tray (20), through-hole (22) have been seted up at the middle part of stock tray (20), through-hole (22) are used for stock (2) that excels in to insert, the tail end threaded connection of stock (2) that excels in has nut (21) to be used for fixed stock tray (20), the bulge that the middle part of stock tray (20) had is used for fixed wire rope (17) winding section, stock tray (20) adopt the thick steel sheet preparation of 6 ~ 8mm to form, prevent its brittle fracture with the steel sheet preparation, cause stock (2) that excels in to take off the anchor, lose the support anchor power of stock (2) that excels in and make stock (2) the air suspension that excels in, lose the key role of stock support, stock tray (20) diameter is greater than 120mm, stock tray (20) can compress tightly wire rope (17) fixedly through its bottom when nut (21) are fixed.
By adopting the technical scheme: through the auxiliary net hanging equipment, the manual hanging mode is replaced, a large amount of manpower and time are saved, the steel wire rope (17) is attached to the inner wall of the roadway (1), the strength of the supporting layer is improved, the installation block (9) is controlled to be right opposite to the high-strength anchor rod (2) through the distance sensor (10), the rotating rod (12) is started to rotate in the annular sliding groove (11), meanwhile, the electric sliding table (18) slides backwards, the fixing ring (13) is driven to move backwards through the L-shaped connecting rod (19), the steel wire rope (17) is conveniently wound at the tail end of the high-strength anchor rod (2) by the rotating rod (12), the electric telescopic rod (8) extends, the steel wire rope (17) wound on the high-strength anchor rod (2) is extruded by the installation block (9) to be attached to the inner wall of the roadway (1), the annular electromagnet (15) is electrified, and the annular electromagnet (15, in the process that the rotating shaft (7) rotates towards the lower high-strength anchor rod (2), the steel wire rope (17) is tensioned by the fixing ring (13), the steel wire rope (17) is ensured to be attached to the inner wall of the roadway (1), and the strength of the supporting layer is improved.
The invention is to say that the invention is a wire rope net hanging method and auxiliary net hanging equipment based on yielding technology, when in use, firstly, after temporary support is carried out on a rough cross section formed after excavation of a roadway (1), concrete needs to be sprayed for the first time, rock exposed on a working surface is sprayed and sealed, secondly, after the initial spraying, a first layer of anchor rods are driven into the rock, the row spacing between the anchor rods is 700 x 700mm, the wire rope (17) is wound around the anchor rods for a circle by using the auxiliary net hanging equipment, the wire rope (17) is fixed at the tail end of the anchor rods, the wire rope (17) is tightened to be tightly attached to a layer surface, the wire rope (17) is hung in sequence, an anchor rod tray (20) is installed on the anchor rods, after the wire rope (17) is tightly pressed and compacted by the anchor rod tray (20), the anchor rod tray (20) is fixed by a nut (21), secondary grouting is carried out, the first layer of anchor rods is covered to form a first layer sealing layer, and thirdly, drilling second-level anchor rods, wherein the second-level anchor rods are arranged in a staggered mode with the first-level anchor rods, the row spacing between the anchor rods is 700 multiplied by 700mm, the auxiliary net hanging equipment is continuously used for hanging the steel wire ropes (17), anchor rod trays (20) are installed on the anchor rods and are fixed through nuts (21), third-time guniting is carried out, the second-level anchor rods are covered, a second-layer seal layer is formed, finally, third-level anchor rods are drilled, the auxiliary net hanging equipment is used for hanging the steel wire ropes (17), the anchor rod trays (20) are installed on the anchor rods, the nuts (21) are used for fixing, fourth-time guniting is carried out, the third-level anchor rods are covered, and a third-layer seal layer is formed.
Claims (7)
1. A steel wire rope net hanging method based on yielding technology is characterized in that: the method comprises the following steps:
a: after temporary support is carried out on a rough cross section formed after the excavation of the roadway, concrete needs to be sprayed for the first time, and the rock exposed on the working face is sprayed and sealed;
b: after primary spraying, driving a first-layer anchor rod into a rock body, wherein the row spacing between the anchor rods is 700 multiplied by 700mm, winding a steel wire rope around the anchor rod for one circle by using auxiliary net hanging equipment, fixing the steel wire rope at the tail end of the anchor rod, tightening the steel wire rope to be tightly attached to a layer surface, hanging the steel wire rope in sequence, mounting an anchor rod tray on the anchor rod, compacting the steel wire rope by using the anchor rod tray, fixing the anchor rod tray by using a nut, spraying grout for the second time, and covering the first-layer anchor rod to form a first-layer seal layer;
c: drilling second-level anchor rods, arranging the second-level anchor rods and the first-level anchor rods in a staggered mode, enabling the row spacing between the anchor rods to be 700 x 700mm, continuing to use auxiliary net hanging equipment to hang the steel wire rope, installing an anchor rod tray on the anchor rods, fixing the anchor rods by nuts, spraying cement for the third time, and covering the second-level anchor rods to form a second layer seal layer;
d: and (4) drilling a third-layer anchor rod, arranging the third-layer anchor rod, the first-layer anchor rod and the second-layer anchor rod in a staggered manner, hanging a steel wire rope by using auxiliary net hanging equipment, installing an anchor rod tray on the anchor rod, fixing the anchor rod tray by using a nut, spraying grout for the fourth time, and covering the third-layer anchor rod to form a third-layer seal layer.
2. The yielding technology-based steel wire rope netting method according to claim 1, characterized in that: the first level stock, second level stock and third level stock all use the same high-strength stock of specification, different levels the degree of depth and the angle that the tunnel was put into to the high-strength stock are all different, wire rope overlap joint length is not less than the stock interval to use two stocks that the overlap joint is adjacent as the standard, hang for the first time and hang for the second time the row spacing is 350mm x 350mm between the wire rope, and the third time hangs wire rope two are a set of, and the row spacing is 230mm x 230mm between two wire ropes of the same group, and the interval of every wire rope is 700mm, and the third time hangs wire rope is 115mm apart from the distance of the wire rope juncture that hangs for the first time and hang for the second time.
3. The utility model provides a supplementary string net equipment of wire rope based on let and press technique, is including installing guide rail and the automobile body in the tunnel bottom, its characterized in that: the automobile body sets up the top at the guide rail, the rotation axis is installed in the front of automobile body, the side-mounting of rotation axis has electric telescopic handle, electric telescopic handle's the one end of keeping away from the rotation axis is fixed with the installation piece, annular spout and jack have been seted up towards one side in tunnel to the installation piece, the jack is located the ring of annular spout, the internally mounted of annular spout has the dwang, the dwang rotates around annular spout at the during operation, the dwang has flexible function in order to adjust length, the side-mounting of installation piece has distance sensor, distance sensor is used for detecting the distance of installation piece apart from the stock that excels in.
4. The yielding technology-based steel wire rope auxiliary net hanging equipment is characterized in that: the last surface mounting of installation piece has electronic slip table, L shape connecting rod is installed at the top of electronic slip table, solid fixed ring is installed to the one end that is close to the tunnel of L shape connecting rod, gu fixed ring is located the up end of dwang, reset spring, two are all installed to solid fixed ring's inner wall both sides reset spring's the one end of keeping away from solid fixed ring all is fixed with annular electromagnet.
5. The yielding technology-based steel wire rope auxiliary net hanging equipment is characterized in that: the top of the vehicle body is provided with a support frame, the middle of the support frame is provided with a steel wire coil in a hanging mode, the outer side of the steel wire coil is wound with a steel wire rope, one end of the steel wire rope penetrates through the fixing ring, and the inner diameter of a ring formed by the annular electromagnets in the power-on working process is the same as the diameter of the steel wire rope.
6. The yielding technology-based steel wire rope auxiliary net hanging equipment is characterized in that: the tail end of stock that excels in is provided with the stock tray, the through-hole has been seted up at the middle part of stock tray, the through-hole is used for the high-strength stock to insert, the tail end threaded connection of the stock that excels in has the nut to be used for fixed stock tray, the bulge that the middle part of stock tray had is used for fixed wire rope winding section.
7. The auxiliary steel wire rope netting device based on the yielding technology as claimed in any one of claims 3 to 6, wherein: the method also comprises the following steps:
1): the vehicle body moves to a position needing to hang a rope on the guide rail, stops at a proper position through a signal of the distance sensor, enables the installation block to be over against the high-strength anchor rod, enables a steel wire rope wound on a steel wire coil to penetrate through the fixing ring, and winds the steel wire rope on the high-strength anchor rod at the bottom of the roadway;
2): the starting motor drives the rotating shaft to rotate, the electric telescopic rod rotates to the next high-strength anchor rod, the high-strength anchor rod is aligned to the jack, the length of the electric telescopic rod is adjusted according to the change of the distance, the rotating rod is started to rotate in the annular sliding groove, meanwhile, the electric sliding table slides backwards, the fixing ring is driven to move backwards through the L-shaped connecting rod, and the rotating rod is convenient for winding the steel wire rope at the tail end of the high-strength anchor rod;
3): after the steel wire rope is wound, the rotating rod is contracted, the electric telescopic rod extends to enable the high-strength anchor rod to be inserted into the insertion hole, the steel wire rope wound on the high-strength anchor rod can be tightly attached to the inner wall of the roadway under the extrusion of the mounting block, the annular electromagnet is electrified to enable the annular electromagnet and the steel wire rope to be fixedly adsorbed, the steel wire rope is tensioned by the fixing ring in the process that the rotating shaft rotates towards the next high-strength anchor rod, then the annular electromagnet is powered off, and the annular electromagnet is pulled back to the original position by the reset spring;
4): repeating the steps, enabling the tail end of the high-strength anchor rod to be completely wound with the steel wire rope, aligning the through hole on the anchor rod tray to the high-strength anchor rod for mounting, fixing through the nut, enabling the winding section of the steel wire rope to be retracted into the protruding part of the anchor rod tray through tensioning of the auxiliary net hanging device, ensuring that the steel wire rope is tightly attached to the inner wall of the roadway, and improving the strength of the supporting layer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113863951A (en) * | 2021-09-16 | 2021-12-31 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway supporting technology based on stack dynamic pressure |
| CN114215562A (en) * | 2021-12-10 | 2022-03-22 | 黄健松 | Supporting device for spraying slurry on geogrid |
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| CN208294566U (en) * | 2018-03-16 | 2018-12-28 | 河北钢铁集团矿业有限公司 | A kind of high concentration tailing cemented filling metal mesh structure barricade |
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| AU3158789A (en) * | 1988-03-17 | 1989-09-21 | Beverley Anne Phillips | Fold-away transportable shelter-enclosure |
| CN202360119U (en) * | 2011-11-22 | 2012-08-01 | 淮北市平远软岩支护工程技术有限公司 | Soft rock roadway supporting structure with multiple spray layers of seal coats |
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| CN113863951A (en) * | 2021-09-16 | 2021-12-31 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway supporting technology based on stack dynamic pressure |
| CN113863951B (en) * | 2021-09-16 | 2024-02-09 | 平顶山天安煤业股份有限公司八矿 | Large-section roadway support technology based on superposition dynamic pressing |
| CN114215562A (en) * | 2021-12-10 | 2022-03-22 | 黄健松 | Supporting device for spraying slurry on geogrid |
| CN114215562B (en) * | 2021-12-10 | 2024-01-30 | 珠海建航建筑劳务有限公司 | Support device for spraying soil engineering grid |
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| CN113187521B (en) | 2023-11-10 |
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