CN112832834A - High-strength and high-toughness support sealing layer technology for preventing rock mass from ejecting and sealing layer equipment - Google Patents
High-strength and high-toughness support sealing layer technology for preventing rock mass from ejecting and sealing layer equipment Download PDFInfo
- Publication number
- CN112832834A CN112832834A CN202110242156.0A CN202110242156A CN112832834A CN 112832834 A CN112832834 A CN 112832834A CN 202110242156 A CN202110242156 A CN 202110242156A CN 112832834 A CN112832834 A CN 112832834A
- Authority
- CN
- China
- Prior art keywords
- wire rope
- steel wire
- mine
- concrete
- rope net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 70
- 238000007789 sealing Methods 0.000 title claims abstract description 62
- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 113
- 239000010959 steel Substances 0.000 claims abstract description 113
- 239000004567 concrete Substances 0.000 claims abstract description 94
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000011378 shotcrete Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 53
- 239000007921 spray Substances 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 abstract description 7
- 238000011160 research Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
Landscapes
- 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)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a high-strength and high-toughness support sealing technology for preventing rock mass ejection and sealing equipment. According to the high-strength and high-toughness supporting and sealing technology and equipment for preventing rock mass ejection, steel wire rope grids which are hung are woven in a mine through anchor rod pressing buckles, the steel wire rope grids are combined to form the steel wire rope grids which take steel wire ropes as radial bones and are matched with the steel wire rope grids in the middle of a multi-layer concrete shotcrete layer, and the high-strength and high-strength steel wire rope grids which are highly closely attached to a rock surface and dense in shotcrete layers and the flexibility and the whole structure of the steel wire ropes are formed.
Description
Technical Field
The invention relates to the field of soft rock support, in particular to the field of high-strength and high-toughness support sealing technology and sealing equipment for preventing rock mass ejection.
Background
As is well known, the research work in the aspect of rock burst in China starts from coal seam water injection tests carried out by Chongqing university and Tianchi coal mines in 1978; subsequently, a plurality of research on ministry-level key scientific research projects are developed domestically, and certain experience is accumulated; in the middle of the 80 s, a monitoring system and a batch of instruments are introduced, an advanced technical foundation is laid for improving the research level, certain achievements are achieved in the aspects of national rock burst mechanism research, coal seam impact tendency evaluation, drilling cutting method research, development and application of a ground sound and micro-seismic system and the like in recent years by absorbing foreign advanced prevention and treatment technologies and scientific research ideas, coal seam water injection, pressure-relief blasting, pressure-relief drilling, induced blasting, top coal mining and the like are adopted in the rock burst in practice, but the effect in the practical supporting engineering is not very ideal, the key is that all the supporting modes aiming at the rock burst still belong to passive supporting with strong resistance and weak yielding, and the problems of tunnel supporting collapse and sudden large deformation when the rock burst occurs cannot be solved; secondly, the adopted support is complex in construction and high in roadway support cost, the repair of the roadway support after damage is more difficult, and the method is not an effective support technology under the rock burst environment, so that a high-strength flexible seal is developed, the roadway support is not damaged strongly during sudden rock burst, the phenomena of large deformation and collapse of the roadway are not generated, and the safety is ensured, so that a support seal technology and seal equipment with high strength and toughness for preventing rock mass ejection are provided,
in order to make the technology more practical and convincing, a series of experiments and industrial field tests are concentrated in a period of time, practice proves that a steel wire rope (6 branch rope) with the diameter of 18mm is disassembled into 2 strands, and the steel wire rope is pulled apart under the pulling force of 165kN when a tensioning experiment is carried out; 2 strands of steel wire ropes with the diameter of 15mm (5 ropes) are subjected to a tensioning experiment, and the steel wire ropes are broken under the tension of 125 kN; and 2 strands of steel wire ropes with the diameter of 12mm (4 minutes) are used for a tensioning experiment, and the steel wire ropes can be broken only by using the pulling force of 52kN, so according to practical demonstration results, in the implementation of high-strength flexible sealing construction, the steel wire ropes with the diameter of more than 18mm (more than 6 minutes) are usually selected as the ribs and bones of a sprayed layer.
In order to carry out scientific evaluation on effective rigidity and yield of a concrete spray layer with steel wire ropes as ribs, a whole-process field test is carried out, an expandable rubber cladding with the effective area of 0.41 square meter is clamped between a roadway wall and the concrete spray layer, the rubber cladding is pressurized by a small manual hydraulic pump to be expanded, a deflection value is measured by a dial indicator, small cracks appear when the deflection value reaches 0.5-0.8 mm, obvious cracks appear when the deflection value reaches 1.0-1.5 mm, the surface is completely damaged after the deflection value reaches 1.5-2.0 mm, however, when the concrete spray layer with the steel wire ropes as the ribs is used, no cracks and damage occur under the same pressure condition, and the final deflection value of the central part with the length of about 1250mm can reach 30 mm.
Disclosure of Invention
The invention mainly aims to provide a high-strength and high-toughness support sealing layer technology and sealing layer equipment for preventing rock mass from ejecting, and the problems in the background technology can be effectively solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a high-strength and high-toughness support sealing technology for preventing rock ejection comprises a concrete inner spraying layer, a plurality of concrete outer spraying layers, an outer steel wire rope net, an outer anchor rod, a spraying track, an inner anchor rod and an inner steel wire rope net which are arranged on the inner surface of a mine, wherein the concrete inner spraying layer is arranged on the outer side of the concrete outer spraying layer, the end parts of the upper ends of the outer anchor rod and the inner anchor rod are fixedly provided with press buckles, the inner bottom of each press buckle is provided with a buckle groove, the end parts of the bottom ends of the outer anchor rod and the inner anchor rod are fixedly provided with anchor rod tips, the middle part of each buckle groove is provided with a limiting groove, the surfaces of the outer steel wire rope net and the inner steel wire rope net are respectively provided with a woven buckle, the outer surface of the woven buckle is clamped and fixed with the limiting groove, the steel wire rope grids hung by the press buckles of the anchor rods are combined to form the multi-level concrete spraying layer with the outer steel wire, the outer steel wire rope net is tightly attached to the surface of the concrete outer spraying layer through the outer anchor rod and the pressing buckle, and the inner steel wire rope net is tightly attached to the surface of the concrete inner spraying layer through the inner anchor rod and the pressing buckle.
The further improvement of the invention is that the shapes of the outer steel wire rope net and the inner steel wire rope net are matched with the shape of the inner wall of the mine, the outer steel wire rope net and the inner steel wire rope net are both arranged in the mine, the outer steel wire rope net and the inner steel wire rope net are integrally formed by common steel bars, the outer anchor rods and the inner anchor rods are uniformly distributed on the inner wall of the soft rock mine, and the thickness of the concrete inner spray layer and the concrete outer spray layer is 100 mm.
The invention is further improved in that the outer steel wire rope net and the inner steel wire rope net are woven by steel wire ropes with the diameter of 18mm, and the longitudinal distance between the outer steel wire rope net and the inner steel wire rope net is 10-20 m.
The invention further improves the technology of the high-strength and high-toughness supporting sealing layer for preventing rock mass from ejecting, and comprises the following steps:
a: drilling the inner surface of a mine smoothly by using a rock drilling device, spraying concrete formed by mixing cement, sand, water and a certain proportion of additives by using air pressure by using a sealing device through a spray gun, carrying and attaching a wall surface in the air by using the force of the air so as to form a concrete inner spraying layer;
b: after the step A is finished, immediately laying an anchoring inner anchor rod after primary guniting, hanging an inner steel wire rope net, uniformly implanting the inner anchor rod into a concrete inner spraying layer and the inner wall of a mine, conveying the inner steel wire rope net integrally formed outside the mine into the mine, tightly attaching the inner steel wire rope net to the surface of the concrete inner spraying layer, clamping and fixing the outer surface of a braided buckle on the surface of the inner steel wire rope net with a limiting groove, and tightly attaching the inner steel wire rope net to the surface of the concrete inner spraying layer through the inner anchor rod and a pressing buckle;
c: and after the step B is finished, repeating the step A and the step B for a plurality of times, and sequentially hanging the outer steel wire rope net and the outer anchor rod on the outer surface of the concrete outer spraying layer to form a multi-layer concrete spraying layer with the outer steel wire rope net and the inner steel wire rope net as the radial ribs.
By the above-mentioned technique: the invention adopts anchor rod pressing buckle to weave the suspended steel wire rope grids in the mine, and the steel wire rope grids are combined into a steel wire rope grid which takes the steel wire rope as a radial bone and is matched with the steel wire rope grid in the middle of a multi-layer concrete guniting layer to form a high-strength and compact guniting layer and a flexibility and integral structure of the steel wire rope, wherein the high-strength and flexible sealing layer can provide a supporting unit with strong supporting resistance for a roadway and also can provide strong guarantee for the safe implementation of each subsequent supporting unit, on one hand, the injected grout is prevented from flowing outwards to keep the pressure, on the other hand, the high-strength and flexible sealing layer is combined with the surrounding rock to form a whole to provide radial force for the surrounding rock, so that the surrounding rock is restored to a three-way stressed state from a two-way stressed state, and when the rock burst is impacted, the supporting roadway is not damaged strongly, the phenomena of large deformation and collapse of.
The invention further improves the device, namely the high-strength and high-toughness supporting and sealing layer device for preventing rock mass from ejecting, the sealing equipment comprises a sealing vehicle body which moves on the injection track, a lifting cylinder is fixedly arranged in the middle of the upper surface of the sealing vehicle body, a supporting plate is fixedly arranged at the end part of the upper end of the lifting cylinder, a servo motor is fixedly arranged on the upper surface of the supporting plate, the output end of the servo motor is connected with a lifting rod in a transmission way, the upper end of the lifting rod is fixedly provided with a connecting plate, the middle part of the upper surface of the connecting plate is fixedly provided with a nozzle, the upper surface of the connecting plate and two sides of the nozzle are fixedly provided with side baffles, the upper surface of the side baffle is fixedly provided with a grinding plate, the radian of the grinding plate is matched with the inner radian of a mine, one opposite side of the two grinding plates is set to be wedge-shaped, and one opposite side of the two grinding plates is provided with a side cutter.
The invention has the further improvement that a fixing ring is fixedly arranged at the bottom of the lifting rod, the circle center of the fixing ring is superposed with the inner circle center of a mine, a diversion trench is formed in one side of each of the two side baffles, which faces each other, a recovery box is fixedly arranged at the bottom of the connecting plate, the output end of the diversion trench is communicated with the recovery box, and the output end of the servo motor is fixedly sleeved with the fixing ring.
The invention is further improved in that two sides of the seal vehicle body are arc-shaped, compression springs are fixedly arranged on two sides of the seal vehicle body, a protection plate is fixedly arranged at the upper end of each compression spring, a touch switch is fixedly arranged on the lower surface of each protection plate, and the output end of each touch switch is electrically connected with a servo motor, so that the vehicle body is protected, and repeated operation is completed.
The invention has the further improvement that the bottom of the seal vehicle body is rotatably connected with a bottom wheel, the bottom wheel rolls in the injection track, the front surface of the seal vehicle body is fixedly provided with a conveying pipe, and the output end of the conveying pipe is connected with a nozzle.
The invention has the further improvement that the controller is fixedly arranged on the front surface of the seal vehicle body, the output end of the controller is connected with the lifting rod, and the length of the lifting rod is matched with the radius of a mine.
By means of the structure: the invention uses the seal car body moving on the injection track of the mine, the lifting cylinder pushes the support plate to move up and down in the mine, the circle center of the fixed ring is positioned at the axle center of the arch mine, the lifting rod can extend and retract to make the device meet the mines of different sizes, the servo motor drives the nozzle and the lifting rod to rotate in the mine, so as to spray the inner surface of the mine uniformly, at the same time, the grinding plates matched with the radian of the mine are fixed on the two sides of the nozzle, so as to uniformly coat the concrete on the inner surface of the mine, the diversion groove arranged on the opposite side of the two grinding plates can recover the redundant concrete inside the mine, the side cutter can cut the raised stone blocks on the inner surface of the mine, so that the concrete is sprayed on the inner surface of the mine rapidly and uniformly, the condition that the sprayed concrete is easy to peel off and peel off is avoided, and the highly-tight rock, The compact high strength of the sprayed layer and the flexibility and the integral structure of the steel wire rope have better safety and creativity.
The invention further improves the high-strength and high-toughness supporting and sealing layer equipment for preventing rock mass from ejecting, and the using steps are as follows:
a: the sealing vehicle body is transported to the interior of the mine tunnel, the bottom wheel slides on the surface of the injection track, the conveying pipe is connected with external concrete production equipment, the controller controls the lifting cylinder to enable the circle center of the fixing ring to coincide with the inner circle center of the mine, meanwhile, the length of the lifting rod is matched with the radius of the mine, and a certain gap exists between the outer surface of the grinding plate and the inner wall of the mine tunnel;
b: after the step A is finished, the servo motor drives the lifting rod to rotate to drive the connecting plate, the nozzle, the side baffle and the grinding plate to integrally rotate, the nozzle sprays concrete to the inner wall of the mine, the grinding plate slides on the inner wall of the mine, meanwhile, the grinding plate matched with the radian of the mine is fixedly arranged on two sides of the nozzle, the concrete can be uniformly coated on the inner surface of the mine, the guide grooves arranged on one opposite sides of the two grinding plates can recover redundant concrete on the inner side of the mine, and the side cutter can cut off raised stones on the inner surface of the mine, so that the concrete is quickly and uniformly sprayed on the inner surface of the mine, the condition that the sprayed concrete is easy to peel off and peel off is avoided, and the high-density high-strength of a highly-close rock surface and a sprayed layer and the flexibility and the integral structure of a steel wire rope are further maintained;
c: after finishing step B, the lifter rotates a cycle after, and the lifter contacts with the surface contact of guard plate, extrudees the compression spring of guard plate and guard plate bottom, makes the touch switch of guard plate bottom and the side touch of seal automobile body, and then makes servo motor reversal, carries out the fast jet completely to the internal surface of mine way like this.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the anchor rod to press and buckle the steel wire rope grids which are woven and hung in the mine, the steel wire rope grids are combined into the steel wire rope grids which take the steel wire rope as the radial bone and are matched with the steel wire rope grids in the middle of the multi-level concrete guniting layer to form the high-strength and dense-layer high-strength steel wire rope and the whole structure, the high-strength and flexible sealing layer not only can provide a supporting unit with strong supporting resistance for a roadway, but also can strongly guarantee the safe implementation of the subsequent supporting units, on one hand, the injected grout is prevented from flowing outwards to keep the pressure, on the other hand, the high-strength and flexible sealing layer is combined with the, provides radial force for the surrounding rock to restore the surrounding rock from a two-way stress state to a three-way stress state, and can be used for providing radial force for the surrounding rock when rock burst occurs, the roadway support is not damaged strongly, the phenomena of large deformation and collapse of the roadway are not generated, the safety is ensured, and the method has better safety and creativity.
2. The invention uses the seal car body moving on the injection track of the mine, the lifting cylinder pushes the support plate to move up and down in the mine, the circle center of the fixed ring is positioned at the axle center of the arch mine, the lifting rod can extend and retract to make the device meet the mines of different sizes, the servo motor drives the nozzle and the lifting rod to rotate in the mine, so as to spray the inner surface of the mine uniformly, at the same time, the grinding plates matched with the radian of the mine are fixed on the two sides of the nozzle, so as to uniformly coat the concrete on the inner surface of the mine, the diversion groove arranged on the opposite side of the two grinding plates can recover the redundant concrete inside the mine, the side cutter can cut the raised stone blocks on the inner surface of the mine, so that the concrete is sprayed on the inner surface of the mine rapidly and uniformly, the condition that the sprayed concrete is easy to peel off and peel off is avoided, and the highly-tight rock, The compact high strength of the sprayed layer and the flexibility and the integral structure of the steel wire rope have better safety and creativity.
Drawings
Fig. 1 is a design schematic diagram of a high-strength and high-toughness supporting sealing layer technology for preventing rock mass ejection.
Fig. 2 is a working schematic diagram of the high-strength and high-toughness supporting sealing layer technology for preventing rock mass ejection and the sealing equipment.
Fig. 3 is a schematic cross-sectional view of the high-strength and high-toughness support seal technology for preventing rock mass ejection.
Fig. 4 is an enlarged schematic view of a high-strength and high-toughness supporting sealing layer technology for preventing rock mass from ejecting in fig. 3.
Fig. 5 is a schematic structural diagram of the anchor rod in the high-strength and high-toughness support sealing layer technology for preventing rock mass ejection.
Fig. 6 is a schematic diagram of connection between an anchor rod and a steel wire rope net in the high-strength and high-toughness support sealing technology for preventing rock mass ejection.
Fig. 7 is a schematic view of the overall structure of the high-strength and high-toughness supporting and sealing layer device for preventing rock mass from ejecting.
Fig. 8 is a partial structural schematic diagram of the high-strength and high-toughness supporting and sealing layer device for preventing rock mass ejection.
In the figure: 1. spraying a concrete inner layer; 2. spraying a concrete outer layer; 3. an outer wire rope mesh; 4. an outer anchor rod; 5. a jetting track; 6. an inner anchor rod; 7. an inner wire rope mesh; 8. pressing and buckling; 9. buckling grooves; 10. a bolt tip; 11. a limiting groove; 12. sealing the vehicle body; 13. a lifting cylinder; 14. a support plate; 15. a recycling bin; 16. a compression spring; 17. a protection plate; 18. a connecting plate; 19. a bottom wheel; 20. a delivery pipe; 21. a controller; 22. a servo motor; 23. a lifting rod; 24. a nozzle; 25. a side dam; 26. grinding a flat plate; 27. a side cutter; 28. a fixing ring; 29. a diversion trench; 301. and (5) weaving the flower buttons.
Detailed Description
In order to make the technical means, the original characteristics, the achieved objects and the functions of the present invention easy to understand, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The invention will be further illustrated with reference to specific embodiments.
Example 1
As shown in figures 1-8, a high-strength and high-toughness supporting and sealing layer technology for preventing rock ejection comprises a concrete inner spraying layer (1) positioned on the inner surface of a mine, a multi-layer concrete outer spraying layer (2), an outer steel wire rope net (3), an outer anchor rod (4), a spraying track (5), an inner anchor rod (6) and an inner steel wire rope net (7), wherein the concrete inner spraying layer (1) is arranged on the outer side of the concrete outer spraying layer (2), the end parts of the upper ends of the outer anchor rod (4) and the inner anchor rod (6) are respectively and fixedly provided with a press buckle (8), the inner bottom part of the press buckle (8) is provided with a buckle groove (9), the end parts of the bottom ends of the outer anchor rod (4) and the inner anchor rod (6) are respectively and fixedly provided with an anchor rod tip (10), the middle part of the buckle groove (9) is provided with a limiting groove (11), the surfaces of the outer steel wire rope net (3) and the inner steel wire rope net (7) are respectively provided with a braided buckle (301), and the outer surface of the braided buckle, anchor rod is pressed and is detained (8) establishment and hang the wire rope net of establishing, the combination becomes outer wire rope net (3) and interior wire rope net (7) and spouts the layer for the multi-level concrete of footpath bone, outer wire rope net (3) closely laminate the surface of spouting layer (2) outside the concrete through outer anchor rod (4) and pressure knot (8), interior wire rope net (7) closely laminate the surface of spouting layer (1) in the concrete through interior anchor rod (6) and pressure knot (8).
As an implementation mode in this embodiment, the shape of outer wire rope net (3) and interior wire rope net (7) and the shape phase-match of mine inner wall, outer wire rope net (3) and interior wire rope net (7) all set up inside the mine, outer wire rope net (3) and interior wire rope net (7) adopt ordinary reinforcing bar integrated into one piece, outer stock (4) and interior stock (6) evenly arrange the inner wall in the soft rock mine, the thickness that spouts layer (1) and concrete outer layer (2) in the concrete is 100 mm.
As an implementation mode in the embodiment, the outer steel wire rope net (3) and the inner steel wire rope net (7) are woven by steel wire ropes with the diameter of 18mm, and the longitudinal distance between the outer steel wire rope net (3) and the inner steel wire rope net (7) is 10-20 m.
As an implementation manner in this embodiment, a high-strength and high-toughness supporting sealing layer technology for preventing rock mass from ejecting includes the following steps:
a: drilling the inner surface of a mine smoothly by using a rock drilling device, spraying concrete formed by mixing cement, sand, water and a certain proportion of additives by using air pressure by using a sealing device through a spray gun, carrying in the air by using the force of the air, and attaching to a wall surface to form a concrete inner spraying layer (1);
b: after the step A is finished, after primary guniting, immediately laying an anchoring inner anchor rod (6), hanging an inner steel wire rope net (7), uniformly implanting the inner anchor rod (6) into a concrete inner spraying layer (1) and the inner wall of a mine, conveying the inner steel wire rope net (7) which is integrally formed outside the mine into the mine, tightly attaching the inner steel wire rope net (7) to the surface of the concrete inner spraying layer (1), clamping and fixing the outer surface of a braided buckle (301) on the surface of the inner steel wire rope net (7) with a limiting groove (11), and tightly attaching the inner steel wire rope net (7) to the surface of the concrete inner spraying layer (1) through the inner anchor rod (6) and a pressing buckle (8);
c: and after the step B is finished, repeating the step A and the step B for a plurality of times, and sequentially hanging the outer steel wire rope net (3) and the outer anchor rod (4) on the outer surface of the concrete outer spraying layer (2) to form a multi-layer concrete spraying layer with the outer steel wire rope net (3) and the inner steel wire rope net (7) as the radial ribs.
The embodiment can realize that: the invention adopts the anchor rod pressing buckle (8) to weave the steel wire rope grids which are hung in a mine, the steel wire rope grids are combined into the steel wire rope grids which take the steel wire rope as a radial bone and are matched with the steel wire rope grids in the middle of a multi-layer concrete guniting layer to form a high-strength and integrated structure which has high-density rock surface and compact guniting layer and the flexibility and the integrated structure of the steel wire rope, a high-strength flexible sealing layer not only can provide a supporting unit with strong supporting resistance for a roadway, but also can ensure the safe implementation of each subsequent supporting unit strongly, on one hand, the injected grout is prevented from flowing outwards to keep the pressure, on the other hand, the, provides radial force for the surrounding rock to restore the surrounding rock from a two-way stress state to a three-way stress state, and can be used for providing radial force for the surrounding rock when rock burst occurs, the roadway support is not damaged strongly, the phenomena of large deformation and collapse of the roadway are not generated, the safety is ensured, and the method has better safety and creativity.
Example 2
As shown in fig. 1-8, a high-strength and high-toughness supporting and sealing device for preventing rock mass from ejecting comprises a sealing vehicle body (12) moving on an injection rail (5), a lifting cylinder (13) is fixedly installed in the middle of the upper surface of the sealing vehicle body (12), a support plate (14) is fixedly installed at the end part of the upper end of the lifting cylinder (13), a servo motor (22) is fixedly installed on the upper surface of the support plate (14), a lifting rod (23) is connected to the output end of the servo motor (22) in a transmission manner, a connecting plate (18) is fixedly installed at the upper end of the lifting rod (23), a nozzle (24) is fixedly installed in the middle of the upper surface of the connecting plate (18), side baffles (25) are fixedly installed on the upper surface of the connecting plate (18) and positioned on two sides of the nozzle (24), a grinding plate (26) is fixedly installed on the upper surface of the side baffles (25), the radian of, the opposite sides of the two grinding plates (26) are arranged to be wedge-shaped, and the opposite sides of the two grinding plates (26) are provided with side cutters (27).
As an implementation mode in the embodiment, a fixing ring (28) is fixedly mounted at the bottom of a lifting rod (23), the circle center of the fixing ring (28) coincides with the inner circle center of a mine, flow guide grooves (29) are formed in one opposite sides of two side baffles (25), a recovery box (15) is fixedly mounted at the bottom of a connecting plate (18), the output end of each flow guide groove (29) is communicated with the recovery box (15), and the output end of a servo motor (22) is fixedly sleeved with the fixing ring (28).
As an implementation mode in the embodiment, the two sides of the seal layer vehicle body (12) are set to be arc-shaped, the compression springs (16) are fixedly mounted on the two sides of the seal layer vehicle body (12), the protection plates (17) are fixedly mounted at the upper ends of the compression springs (16), the touch switches are fixedly mounted on the lower surfaces of the protection plates (17), the output ends of the touch switches are electrically connected with the servo motor (22), and repeated operation is completed while the vehicle body is protected.
As an implementation mode in the embodiment, the bottom of the seal vehicle body (12) is rotatably connected with a bottom wheel (19), the bottom wheel (19) rolls in the spraying track (5), the front surface of the seal vehicle body (12) is fixedly provided with a conveying pipe (20), and the output end of the conveying pipe (20) is connected with a nozzle (24).
As an implementation mode in the embodiment, a controller (21) is fixedly installed on the front face of the seal layer vehicle body (12), the output end of the controller (21) is connected with a lifting rod (23), and the length of the lifting rod (23) is matched with the radius of a mine.
As an implementation manner in this embodiment, a high-strength and high-toughness supporting and sealing layer device for preventing rock mass from ejecting includes the following steps:
a: the sealing vehicle body (12) is transported to the interior of a mine tunnel, bottom wheels (19) slide on the surface of a jet track (5), a delivery pipe (20) is connected with external concrete production equipment, a controller (21) controls a lifting cylinder (13) to enable the circle center of a fixed ring (28) to coincide with the inner circle center of a mine, meanwhile, the length of a lifting rod (23) is matched with the radius of the mine, and a certain gap exists between the outer surface of a grinding plate (26) and the inner wall of the mine tunnel;
b: after the step A is finished, the servo motor (22) drives the lifting rod (23) to rotate, the whole body formed by the connecting plate (18), the nozzle (24), the side baffle (25) and the grinding plate (26) is driven to rotate, the nozzle (24) sprays concrete to the inner wall of the mine tunnel, the grinding plate (26) slides on the inner wall of the mine tunnel, meanwhile, the grinding plate (26) matched with the radian of the mine is fixedly arranged on the two sides of the nozzle (24) so as to uniformly coat the concrete on the inner surface of the mine, and the guide groove (29) arranged at one side of the two grinding plates (26) which faces each other can recover the redundant concrete at the inner side of the mine, the side cutter (27) can cut off the raised stone blocks on the inner surface of the mine, so that the concrete is quickly and uniformly sprayed on the inner surface of the mine, the condition that the sprayed concrete is easy to peel off and peel off is avoided, thereby maintaining the high strength of the high-density rock surface and the compact sprayed layer and the flexibility and the integral structure of the steel wire rope;
c: after the step B is completed, after the lifting rod (23) rotates for one period, the lifting rod (23) is in contact with the outer surface of the protection plate (17), the protection plate (17) and a compression spring (16) at the bottom of the protection plate (17) are extruded, a touch switch at the bottom of the protection plate (17) is made to touch the side surface of the seal car body (12), the servo motor (22) is made to rotate reversely, and therefore the inner surface of the mine way is rapidly and completely sprayed.
The embodiment can realize that: the invention uses a seal car body (12) moving on a jet track (5) of a mine, a lifting cylinder (13) pushes a support plate (14) to move up and down in the mine, the circle center of a fixed ring (28) is positioned at the axle center of an arch mine, a lifting rod (23) can stretch to enable the equipment to meet the mine with different sizes, a servo motor (22) drives a whole body formed by a nozzle (24) and the lifting rod (23) to rotate in the mine to uniformly spray slurry on the inner surface of the mine, grinding plates (26) matched with the radian of the mine are fixedly arranged on two sides of the nozzle (24) at the same time, the concrete can be uniformly coated on the inner surface of the mine, a diversion trench (29) arranged on one side opposite to the two grinding plates (26) can recover the redundant concrete on the inner side of the mine, and a side cutter (27) can cut off the convex stone on the inner surface of the mine, the concrete is quickly and uniformly sprayed on the inner surface of the mine, the condition that the sprayed concrete is easy to peel and peel is avoided, the high-strength property of high-density close rock surface and dense spraying layer and the flexibility and the integral structure of the steel wire rope are further maintained, and the safety and the creativity are better.
The invention is a high-strength and high-toughness supporting and sealing technology for preventing rock ejection and sealing equipment, when in use, firstly, rock drilling equipment is used for drilling the inner surface of a mine to be smooth, the sealing equipment is used for spraying concrete mixed by cement, sand, water and a certain proportion of admixture through a spray gun by utilizing air pressure, the concrete is pumped by the force of air and is conveyed and attached to the wall surface in the air to form a concrete inner spraying layer (1), furthermore, a sealing vehicle body (12) is conveyed to the interior of a mine, a bottom wheel (19) slides on the surface of a spraying track (5), a conveying pipe (20) is connected with external concrete production equipment, a controller (21) controls a lifting cylinder (13) to enable the circle center of a fixed ring (28) to coincide with the center of the mine, simultaneously, the length of an inner round rod (23) is matched with the radius of the mine, a certain gap exists between the outer surface of a grinding plate (26) and the inner wall of the mine, thirdly, a servo motor (22) drives a lifting rod (23) to rotate to drive the connecting plate (18), the nozzle (24), the side baffle (25) and the grinding plate (26) to integrally rotate, the nozzle (24) sprays concrete to the inner wall of the mine, the grinding plate (26) slides on the inner wall of the mine, meanwhile, the grinding plate (26) matched with the radian of the mine is fixedly arranged on two sides of the nozzle (24) and can uniformly coat the concrete on the inner surface of the mine, a diversion trench (29) arranged on one side, which is opposite to the two grinding plates (26), can recover the redundant concrete on the inner side of the mine, and a side cutter (27) can cut off the raised stones on the inner surface of the mine, so that the concrete is quickly and uniformly sprayed on the inner surface of the mine, the condition that the sprayed concrete is easy to peel off and peel off is avoided, and the high-density rock surface, the dense high strength of a sprayed layer and the flexibility and the integral structure of a steel wire rope, then, after the lifting rod (23) rotates for a period, the lifting rod (23) is in contact with the outer surface of the protection plate (17), the protection plate (17) and a compression spring (16) at the bottom of the protection plate (17) are extruded, a touch switch at the bottom of the protection plate (17) is in touch with the side surface of the seal coat vehicle body (12), and then a servo motor (22) is rotated reversely, so that the inner surface of the mine path is quickly and completely sprayed, an anchoring inner anchor rod (6) is immediately laid after primary slurry spraying, an inner steel wire rope net (7) is hung, the inner anchor rod (6) is uniformly implanted into a concrete inner spraying layer (1) and the inner wall of a mine, the inner steel wire rope net (7) integrally formed outside the mine is transported into the mine, the inner steel wire rope net (7) is tightly attached to the surface of the concrete inner spraying layer (1), the outer surface of a braided buckle (301) on the surface of the inner steel wire rope net (7) is fixedly connected with a limiting groove (11) in, interior wire rope net (7) are through interior stock (6) and press buckle (8) closely the laminating spout the surface of layer (1) in the concrete, and finally, repeated many times operation hangs outer wire rope net (3) and outer stock (4) in proper order and spouts the surface of layer (2) outside the concrete, and the multilayer concrete that the combination becomes outer wire rope net (3) and interior wire rope net (7) for the footpath bone spouts the layer.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a prevent high strength toughness's of rock mass ejection and strut seal technology which characterized in that: the concrete spraying device comprises a concrete inner spraying layer, a multi-layer concrete outer spraying layer, an outer steel wire rope net, an outer anchor rod, a spraying track, an inner anchor rod and an inner steel wire rope net which are positioned on the inner surface of a mine, wherein the concrete inner spraying layer is arranged on the outer side of the concrete outer spraying layer, the end parts of the upper ends of the outer anchor rod and the inner anchor rod are fixedly provided with press buckles, the inner bottom parts of the press buckles are provided with buckle grooves, the end parts of the bottom ends of the outer anchor rod and the inner anchor rod are fixedly provided with anchor rod tips, the middle parts of the buckle grooves are provided with limit grooves, the surfaces of the outer steel wire rope net and the inner steel wire rope net are provided with woven buckles, the outer surfaces of the woven buckles are clamped and fixed with the limit grooves, the anchor rod pressed buckles are woven and hung steel wire rope grids to form the multi-layer concrete spraying layer with the outer steel wire rope net and the inner steel wire rope net as radial ribs, and the outer steel wire rope net is tightly attached to the surface, the inner steel wire rope net is tightly attached to the surface of the concrete inner spraying layer through the inner anchor rod and the pressing buckle.
2. The high-strength and high-toughness supporting and sealing technology for preventing rock mass ejection according to claim 1, characterized in that: the shape of outer wire rope net and interior wire rope net and the shape phase-match of mine inner wall, outer wire rope net and interior wire rope net all set up inside the mine, outer wire rope net and interior wire rope net adopt ordinary reinforcing bar integrated into one piece, outer stock and interior stock evenly arrange the inner wall in soft rock mine, the thickness that spouts the layer in the concrete and spout the layer outside the concrete is 100 mm.
3. The high-strength and high-toughness supporting and sealing technology for preventing rock mass ejection according to claim 1, characterized in that: the outer steel wire rope net and the inner steel wire rope net are woven by steel wire ropes with the diameter of 18mm, and the longitudinal distance between the outer steel wire rope net and the inner steel wire rope net is 10-20 m.
4. The high-strength and high-toughness supporting and sealing layer technology for preventing rock mass ejection as claimed in claims 1-3, is characterized in that: the method comprises the following steps:
a: drilling the inner surface of a mine smoothly by using a rock drilling device, spraying concrete formed by mixing cement, sand, water and a certain proportion of additives by using air pressure by using a sealing device through a spray gun, carrying and attaching a wall surface in the air by using the force of the air so as to form a concrete inner spraying layer;
b: after the step A is finished, immediately laying an anchoring inner anchor rod after primary guniting, hanging an inner steel wire rope net, uniformly implanting the inner anchor rod into a concrete inner spraying layer and the inner wall of a mine, conveying the inner steel wire rope net integrally formed outside the mine into the mine, tightly attaching the inner steel wire rope net to the surface of the concrete inner spraying layer, clamping and fixing the outer surface of a braided buckle on the surface of the inner steel wire rope net with a limiting groove, and tightly attaching the inner steel wire rope net to the surface of the concrete inner spraying layer through the inner anchor rod and a pressing buckle;
c: and after the step B is finished, repeating the step A and the step B for a plurality of times, and sequentially hanging the outer steel wire rope net and the outer anchor rod on the outer surface of the concrete outer spraying layer to form a multi-layer concrete spraying layer with the outer steel wire rope net and the inner steel wire rope net as the radial ribs.
5. The sealing equipment used in the high-strength and high-toughness supporting sealing technology for preventing rock mass ejection according to claim 4 is characterized in that: the sealing equipment includes the sealing automobile body that moves on spraying the track, the upper surface middle part fixed mounting of sealing automobile body has the lift cylinder, the tip fixed mounting of the upper end of lift cylinder has the backup pad, the last fixed surface of backup pad installs servo motor, servo motor's output transmission is connected with the lifter, the upper end fixed mounting of lifter has the connecting plate, the upper surface middle part fixed mounting of connecting plate has the nozzle, the upper surface of connecting plate and the both sides fixed mounting that is located the nozzle have the side shield, the last fixed surface of side shield installs the dull and stereotyped mill, grind dull and stereotyped radian and the interior camber adaptation of mine, two grind dull and stereotyped relative one side and set up to carve the type, two grind dull and stereotyped opposite one side of mill and install the side cutter.
6. The high-strength and high-toughness supporting and sealing equipment for preventing rock mass ejection according to claim 5, is characterized in that: the bottom fixed mounting of lifter has solid fixed ring, gu fixed ring's the centre of a circle coincides with the interior centre of a circle of mine, two the guiding gutter has been seted up to the one side that faces mutually of side shield, the bottom fixed mounting of connecting plate has the collection box, the output and the collection box of guiding gutter switch on, servo motor's output and fixed ring are fixed to be cup jointed.
7. The high-strength and high-toughness supporting and sealing equipment for preventing rock mass ejection according to claim 5, is characterized in that: the both sides of seal automobile body set up to the arc, the both sides fixed mounting of seal automobile body has compression spring, compression spring's upper end fixed mounting has the guard plate, the lower fixed surface of guard plate installs touch switch, touch switch's output and servo motor electric connection.
8. The high-strength and high-toughness supporting and sealing equipment for preventing rock mass ejection according to claim 5, is characterized in that: the bottom of the seal car body is rotatably connected with a bottom wheel, the bottom wheel rolls in the injection track, the front fixed mounting of the seal car body is provided with a conveying pipe, and the output end of the conveying pipe is connected with a nozzle.
9. The high-strength and high-toughness supporting and sealing equipment for preventing rock mass ejection according to claim 5, is characterized in that: the front of the seal car body is fixedly provided with a controller, the output end of the controller is connected with a lifting rod, and the length of the lifting rod is matched with the radius of a mine.
10. The high-strength and high-toughness supporting and sealing equipment for preventing rock mass ejection according to any one of claims 5 to 9, is characterized in that: the use steps are as follows:
a: the sealing vehicle body is transported to the interior of the mine tunnel, the bottom wheel slides on the surface of the injection track, the conveying pipe is connected with external concrete production equipment, the controller controls the lifting cylinder to enable the circle center of the fixing ring to coincide with the inner circle center of the mine, meanwhile, the length of the lifting rod is matched with the radius of the mine, and a certain gap exists between the outer surface of the grinding plate and the inner wall of the mine tunnel;
b: after the step A is finished, the servo motor drives the lifting rod to rotate to drive the connecting plate, the nozzle, the side baffle and the grinding plate to integrally rotate, the nozzle sprays concrete to the inner wall of the mine, the grinding plate slides on the inner wall of the mine, meanwhile, the grinding plate matched with the radian of the mine is fixedly arranged on two sides of the nozzle, the concrete can be uniformly coated on the inner surface of the mine, the guide grooves arranged on one opposite sides of the two grinding plates can recover redundant concrete on the inner side of the mine, and the side cutter can cut off raised stones on the inner surface of the mine, so that the concrete is quickly and uniformly sprayed on the inner surface of the mine, the condition that the sprayed concrete is easy to peel off and peel off is avoided, and the high-density high-strength of a highly-close rock surface and a sprayed layer and the flexibility and the integral structure of a steel wire rope are further maintained;
c: after finishing step B, the lifter rotates a cycle after, and the lifter contacts with the surface contact of guard plate, extrudees the compression spring of guard plate and guard plate bottom, makes the touch switch of guard plate bottom and the side touch of seal automobile body, and then makes servo motor reversal, carries out the fast jet completely to the internal surface of mine way like this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110242156.0A CN112832834B (en) | 2021-03-04 | 2021-03-04 | High-strength and high-toughness support sealing method for preventing rock mass from ejecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110242156.0A CN112832834B (en) | 2021-03-04 | 2021-03-04 | High-strength and high-toughness support sealing method for preventing rock mass from ejecting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112832834A true CN112832834A (en) | 2021-05-25 |
| CN112832834B CN112832834B (en) | 2022-03-01 |
Family
ID=75934638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110242156.0A Active CN112832834B (en) | 2021-03-04 | 2021-03-04 | High-strength and high-toughness support sealing method for preventing rock mass from ejecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112832834B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374508A (en) * | 2021-07-20 | 2021-09-10 | 淮北市平远软岩支护工程技术有限公司 | Grouting device for high rock burst and using method |
| CN113586081A (en) * | 2021-09-03 | 2021-11-02 | 淮北市平远软岩支护工程技术有限公司 | Active dynamic repair method for double-truss roadway with high rock burst |
| CN114856662A (en) * | 2022-05-24 | 2022-08-05 | 中铁第五勘察设计院集团有限公司 | High-ground-stress interbedded soft rock tunnel anchor rod supporting structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235721A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
| KR20090019969A (en) * | 2007-08-22 | 2009-02-26 | 정병삼 | Construction formation of corrugated steel pipe using wire rope |
| 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 |
| CN103195441A (en) * | 2013-04-01 | 2013-07-10 | 平顶山天安煤业股份有限公司 | Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| CN103334779A (en) * | 2013-06-25 | 2013-10-02 | 淮北市平远软岩支护工程技术有限公司 | Method for constructing isotropic surrounding rock soft rock roadway support |
| CN104612727A (en) * | 2014-12-18 | 2015-05-13 | 淮北市平远软岩支护工程技术有限公司 | Large plate bottom supporting method for soft rock roadway |
| CN110939456A (en) * | 2019-12-05 | 2020-03-31 | 华亭煤业集团有限责任公司 | High-stress roadway combined ring body beam supporting structure and construction method thereof |
-
2021
- 2021-03-04 CN CN202110242156.0A patent/CN112832834B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090019969A (en) * | 2007-08-22 | 2009-02-26 | 정병삼 | Construction formation of corrugated steel pipe using wire rope |
| CN101235721A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
| 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 |
| CN103195441A (en) * | 2013-04-01 | 2013-07-10 | 平顶山天安煤业股份有限公司 | Supporting and reinforcing structure of coal mine tunnel and construction technology thereof |
| CN103334779A (en) * | 2013-06-25 | 2013-10-02 | 淮北市平远软岩支护工程技术有限公司 | Method for constructing isotropic surrounding rock soft rock roadway support |
| CN104612727A (en) * | 2014-12-18 | 2015-05-13 | 淮北市平远软岩支护工程技术有限公司 | Large plate bottom supporting method for soft rock roadway |
| CN110939456A (en) * | 2019-12-05 | 2020-03-31 | 华亭煤业集团有限责任公司 | High-stress roadway combined ring body beam supporting structure and construction method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374508A (en) * | 2021-07-20 | 2021-09-10 | 淮北市平远软岩支护工程技术有限公司 | Grouting device for high rock burst and using method |
| CN113586081A (en) * | 2021-09-03 | 2021-11-02 | 淮北市平远软岩支护工程技术有限公司 | Active dynamic repair method for double-truss roadway with high rock burst |
| CN114856662A (en) * | 2022-05-24 | 2022-08-05 | 中铁第五勘察设计院集团有限公司 | High-ground-stress interbedded soft rock tunnel anchor rod supporting structure |
| CN114856662B (en) * | 2022-05-24 | 2024-05-17 | 中铁第五勘察设计院集团有限公司 | High-ground-stress interbedded soft rock tunnel anchor rod supporting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112832834B (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112832834B (en) | High-strength and high-toughness support sealing method for preventing rock mass from ejecting | |
| CN105507927B (en) | Air bag inner model mobile formwork and Tunnel construction of shotcrete method | |
| CN110939457B (en) | Inflatable seismic isolation and reduction tunnel lining structure and construction method | |
| US9016378B2 (en) | Shale gas operation method | |
| CN103603676B (en) | A kind of scraper laneway support method | |
| CN110617069A (en) | Full-circle excavation construction method | |
| CN109403987B (en) | Shield end horizontal freezing and short steel box combined receiving device and construction method | |
| CN107218061A (en) | The tunnel monitoring supporting combined system and method for a kind of Coupled Rigid-flexible | |
| CN114109415A (en) | Construction method for disassembling tunnel of shield machine of non-expanding excavation chamber | |
| CN111119998A (en) | Underwater tunnel prevents gushing water installation fast | |
| CN108049890A (en) | A kind of suspension device and method for protecting support to empty lane | |
| CN210068178U (en) | Tunnel supporting lining with buffering performance | |
| KR100632978B1 (en) | The methods of continuous partial work for anold and timeworn sewer pipe | |
| CN110847240A (en) | Inspection well in roadway and construction method | |
| CN106401615A (en) | Highway tunnel supporting structure integrating initial lining steel arch and prestressed anchor rods and construction technology | |
| CN107700490B (en) | Gunite concrete makes up constructing structure and its construction method in advance between the stake of sand ovum stratum | |
| CN113339031A (en) | Roadway support process system under extremely soft stratum condition and construction method | |
| CN110318797B (en) | Coal face withdrawing device and using method thereof | |
| CN211646458U (en) | Inspection well in roadway | |
| CN110410132B (en) | Air leakage preventing process for reserving narrow coal pillars | |
| CN105834017B (en) | A kind of tunnel gunite concrete automatic nozzle and its perform method | |
| CN109695455B (en) | Method for receiving soil pressure balance shield in pure water | |
| CN115324607A (en) | New construction method for single shield TBM (Tunnel boring machine) of coal mine tunnel | |
| CN206360708U (en) | Cavern's shallow-layer landslide supporting construction under unfavorable geological condition | |
| CN204163762U (en) | A kind of filling in mine barricade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |