CN111720149A - Mining anchor rope of cavity slip casting - Google Patents
Mining anchor rope of cavity slip casting Download PDFInfo
- Publication number
- CN111720149A CN111720149A CN202010711811.8A CN202010711811A CN111720149A CN 111720149 A CN111720149 A CN 111720149A CN 202010711811 A CN202010711811 A CN 202010711811A CN 111720149 A CN111720149 A CN 111720149A
- Authority
- CN
- China
- Prior art keywords
- pipe
- grouting
- hollow
- slip casting
- cavity
- 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.)
- Pending
Links
- 238000007569 slipcasting Methods 0.000 title claims description 19
- 238000005065 mining Methods 0.000 title claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 6
- 230000017105 transposition Effects 0.000 claims description 2
- 238000009955 starching Methods 0.000 claims 2
- 239000011440 grout Substances 0.000 abstract description 17
- 238000004873 anchoring Methods 0.000 abstract description 14
- 239000011347 resin Substances 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 230000008093 supporting effect Effects 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 239000002002 slurry Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a hollow grouting mine anchor cable which comprises a head steel pipe, a hollow steel strand, a plastic grout stopping pipe outer sleeve, a hollow hexagon nut, a grouting opening, a hexagon bolt, a grouting pipe, a grout stopping plug, a supporting plate and a mine anchor cable anchorage device, wherein a plurality of twisted hollow steel strands are fixed on the right side of the head steel pipe, the plastic grout stopping pipe is sleeved on the outer side of each hollow steel strand, the plastic grout stopping pipe outer sleeve is wrapped on the outer wall of each plastic grout stopping pipe, the hollow hexagon nut is welded at the right end of each hollow steel strand, a right port of each hollow hexagon nut is set as a grouting opening, the hexagon bolt is in threaded connection with the grouting opening, the grouting pipe is welded at the left side of the grouting opening, and the grout stopping plug is sleeved at the right part of each hollow steel strand. The invention has the characteristics of high strength, good plasticity, low relaxation value, good straightening property, strong wrapping force and integrity with resin anchoring agent and grouting liquid, and the like.
Description
Technical Field
The invention relates to a mine anchor cable, in particular to a hollow grouting mine anchor cable.
Background
In the coal face, roadway supports or single pillars are generally used for advance support, and when the roadways are irregularly arranged, if the roadway supports are used for support in advance, the roadway supports are not easy to retract when the working face is stubbled; if the single support is used in advance, the roadway is wide (4.2 m) and high (4.3 m), so that the labor intensity of workers is high and the risk coefficient is high when the single support is used. Aiming at the problem, a technology of replacing the traditional advanced support with a hollow grouting anchor cable is provided. The surface of each steel strand of the anchor cable has textures, a certain space is occupied, and meanwhile, grouting anchor cables of other models or processes are used underground, so that the grouting effect after slurry solidification is directly influenced because the grouting effect is poor, the supporting strength and the supporting effect cannot be achieved, and the grouting efficiency is reduced.
Disclosure of Invention
The invention aims to provide a hollow grouting mine anchor cable to solve the technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a mining anchor rope of cavity slip casting, includes that head steel pipe, cavity steel strand wires, plastics end the thick liquid pipe overcoat, cavity hexagon nut, slip casting mouth, hex bolts, slip casting pipe, end thick liquid stopper, layer board, mining anchor rope ground tackle, head steel pipe right side is fixed with the cavity steel strand wires of many transposition, the plastics end the thick liquid pipe has been cup jointed in the cavity steel strand wires outside, plastics end the thick liquid pipe overcoat that wraps up of thick liquid pipe outer wall has plastics end the thick liquid pipe overcoat, the welding of cavity steel strand wires right-hand member has cavity hexagon nut, cavity hexagon nut right-hand member mouth is established to the slip casting mouth, hex bolts and slip casting mouth threaded connection, the welding of slip casting mouth left side has the slip casting pipe, and the slip casting stopper cup joints in cavity steel strand wires right part of telling, the contact of slip casting stopper right-hand member has.
On the basis of the technical scheme, the surfaces of the hollow steel strands are smooth, and a sealed space is formed between every two adjacent hollow steel strands in a seamless mode through welding.
On the basis of the technical scheme, the grouting pipe is 5-8 cm and is communicated with the interiors of the hollow steel strands.
Compared with the prior art, the invention has the following advantages: compared with the existing grouting anchor cable, the invention has the characteristics of high strength, good plasticity, low relaxation value, good extension property, strong bond force with resin anchoring agent, no exposed slurry, the same integral supporting effect as reinforced concrete, the realization of integral anchoring of a top plate and the like, the grouting pipe omits a steel pipe the middle of which extends to a slurry outlet, reduces the production cost, increases the grouting material escaping space inside the hollow grouting anchor cable, has quick grouting and difficult grouting blockage, eliminates the possibility of generating air cavities and air holes during grouting, ensures that the anchoring slurry is filled in a drill hole, saves a special joint for an exhaust pipe and a grouting pipe, does not need to bind the grouting pipe, the exhaust pipe and block the grouting hole on site, and greatly simplifies the construction process.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention.
FIG. 2 is a sectional view showing the position of the grouting pipe according to the present invention.
In the figure: 1. the anchor comprises a head steel pipe, 2 hollow steel strands, 3 plastic grout stopping pipes, 4 plastic grout stopping pipe jackets, 5 hollow hexagon nuts, 6 grout injection ports, 7 hexagon bolts, 8 grout injection pipes, 9 grout stopping plugs, 10 supporting plates, 11 and a mining anchor rope anchorage.
Detailed Description
The invention is explained in further detail below with reference to the figures and the specific embodiments.
The mining anchor cable shown in the figures 1-2 has the characteristics of high strength, long anchoring length, capability of transmitting pre-applied tension to a rock stratum with a stable deep part and the like.
The structural composition of the hollow steel strand is as follows:
the dimensions and mechanical properties are given in the following table:
1. and selecting hollow grouting mine anchor cables with different lengths according to different coal seam thicknesses, and ensuring that the anchor cables penetrate into a stable rock stratum to be not less than 1.0 m.
2. Equipment and tools required by construction: the drilling machine comprises a jumbolter, a double-wing drill bit with the diameter of 32mm or 39mm, a stirring head, a tensioning jack, a cement paste stirrer and a cement paste grouting pump.
3. Construction process
The field use of the mining anchor cable can be divided into five main processes of ground preparation, drilling, anchoring of an anchoring section, tensioning and hole sealing and grouting.
a) Preparing the ground: according to the structure and the application, the following requirements are met in the transportation process of the hollow grouting anchor cable:
(1) during loading and unloading, the anchor cable is carefully and lightly placed so as to avoid damaging the tail part of the anchor cable and influencing grouting.
(2) The surface of the anchor cable is kept clean in the transportation process, the anchor cable is prevented from being stained with mud, ash, coal powder, oil and water to influence the bonding effect of the anchor cable, the resin anchoring agent and the grouting liquid, and the anchor cable grout outlet is prevented from being blocked by impurities.
b) Drilling: the drilling hole can be drilled by an anchor rod drilling machine or a light special anchor cable drilling machine, can be connected with a B19 or B22 drill rod, a phi 32mm or phi 39mm rotary drill bit is selected according to the specification of the anchor cable, and the drilling machine is kept not to move during drilling so as to prevent the situation that the axes of the drilling holes are not on the same straight line and bring difficulty to the installation of the anchor cable, and the process is similar to anchor rod drilling.
c) Anchoring: the method comprises the steps of sequentially feeding an ultrafast or quick resin anchoring agent and a medium-speed resin anchoring agent into a hole, gently feeding the resin anchoring agent into the bottom of the hole by using a hollow grouting mine anchor cable, connecting the anchor cable with a drilling machine by using a stirring connector, starting the drilling machine, stirring while propelling for 20-30 s, feeding the anchor cable into the bottom of the hole, stopping the drilling machine without dropping, waiting for 1-2 min, dropping the drilling machine, and unloading the stirring connector to finish the resin anchoring of the anchor cable.
d) And (3) expanding and pulling, namely curing the resin anchoring agent for 1 hour, then installing a grout stop plug, a supporting plate and a jig after curing, exposing the hole sealing device for about 100mm, hanging an expanding and pulling jack, opening a pump to stretch (seal) holes for the first time, stopping expanding and pulling after the grout stop plug is completely pressed into the drilled hole, checking whether the hole sealing condition is compact, otherwise, repeatedly stretching and sealing the holes by adding a steel pipe or a hard plastic pipe with a proper diameter until the hole sealing condition is compact, resetting the jack, opening the pump again to stretch for the second time, observing the reading of a pressure gauge, stopping stretching and detaching the jack when the designed tension is reached.
e) Grouting
(1) The grout is 42.5MPa ordinary Portland cement, the grout is prepared according to the water cement ratio of 0.4-0.5, 8-10% of cement grouting additive is added, and the grouting pressure is generally controlled at 0.8-0.9 MPa.
(2) During grouting, the screw plug at the tail part of the hollow grouting anchor cable is firstly detached, the grouting device is connected to the internal thread at the tail part of the anchor cable, the grouting device is slowly screwed, and then the grouting device is connected with a grouting pump through a grouting pipeline. When the grouting device (grouting quick connector) and the grouting pipeline are intact and the connection is reliable, grouting can be started.
(3) And (4) slowly opening the grouting pump for grouting, wherein the grouting speed is preferably low at the beginning, and the grouting pressure is controlled. When the pressure reaches the design pressure, the grouting pump is closed, then the stop valve at the tail part of the hollow grouting anchor cable is closed, the pipeline pressure relief valve is opened to relieve the pressure of the pipeline, then the grouting device at the tail part of the anchor cable is dismounted, and the plug at the tail part of the anchor cable is screwed up firmly.
(4) In the grouting process, when local leakage and leakage are found, grouting is stopped in time, and cotton yarns and the like are used for plugging. After grouting, the stop valve at the tail part of the hollow anchor cable can be opened until the grout is initially set.
(5) The slurry-eating amount of the anchor cable is observed in the grouting process, and if the slurry-eating amount is small, the slurry quality and the grouting quality are influenced, the tee-joint flow dividing device is used for dividing the slurry.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.
Claims (3)
1. The utility model provides a mining anchor rope of cavity slip casting, ends thick liquid pipe (3), plastics and ends thick liquid pipe overcoat (4), cavity hexagon nut (5), slip casting mouth (6), hexagon bolt (7), slip casting pipe (8), ends thick liquid stopper (9), layer board (10), mining anchor rope ground tackle (11) including head steel pipe (1), cavity steel strand wires (2), plastics, its characterized in that: head steel pipe (1) right side is fixed with cavity steel strand wires (2) of many transposition, cavity steel strand wires (2) outside has been cup jointed plastics and has been only starched pipe (3), plastics end starching pipe (3) outer wall parcel has plastics to end starching pipe overcoat (4), cavity steel strand wires (2) right-hand member welding has cavity hexagon nut (5), cavity hexagon nut (5) right-hand member mouth is established to slip casting mouth (6), hexagon bolt (7) and slip casting mouth (6) threaded connection, slip casting mouth (6) left side welding has slip casting pipe (8), and the stop of telling stopper (9) cup joints in cavity steel strand wires (2) right part, stop the contact of slip casting stopper (9) right-hand member has layer board (10), mining anchor rope ground tackle (11) are installed on layer board (10) right side.
2. The anchor cable for the hollow grouting mine according to claim 1, wherein: the surfaces of the hollow steel strands (2) are smooth, and a sealed space is formed between every two adjacent hollow steel strands (2) in a seamless mode through welding.
3. The anchor cable for the hollow grouting mine according to claim 1, wherein: the grouting pipes (8) are 5cm-8cm and are communicated with the interiors of the hollow steel strands (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711811.8A CN111720149A (en) | 2020-07-22 | 2020-07-22 | Mining anchor rope of cavity slip casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711811.8A CN111720149A (en) | 2020-07-22 | 2020-07-22 | Mining anchor rope of cavity slip casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111720149A true CN111720149A (en) | 2020-09-29 |
Family
ID=72573203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010711811.8A Pending CN111720149A (en) | 2020-07-22 | 2020-07-22 | Mining anchor rope of cavity slip casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111720149A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554921A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Hollow tensioning anchor rod surrounding rock reinforcing method |
| CN112554925A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Stretch-draw slip casting stock |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203430547U (en) * | 2013-09-02 | 2014-02-12 | 晋城宏圣科威矿用材料有限公司 | Bolting and grouting double-reinforcing mining anchor cable |
| CN103670467A (en) * | 2013-10-29 | 2014-03-26 | 淮南矿业(集团)有限责任公司 | Grouting anchor cable |
| CN104405423A (en) * | 2014-10-23 | 2015-03-11 | 山西晋城无烟煤矿业集团有限责任公司 | Mining grouting anchor rope |
| CN104674808A (en) * | 2015-02-28 | 2015-06-03 | 安徽理工大学 | Novel assembly type hollow grouting anchor bolt and construction method thereof |
| CN205206857U (en) * | 2015-12-21 | 2016-05-04 | 新泰惠众经贸有限公司 | Practical cavity slip casting anchor rope |
| CN209976560U (en) * | 2019-03-08 | 2020-01-21 | 山东焱鑫矿用材料加工有限公司 | Novel hollow grouting anchor cable |
| CN212642773U (en) * | 2020-07-22 | 2021-03-02 | 枣庄市顺翔科技发展有限公司 | Mining anchor rope of cavity slip casting |
-
2020
- 2020-07-22 CN CN202010711811.8A patent/CN111720149A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203430547U (en) * | 2013-09-02 | 2014-02-12 | 晋城宏圣科威矿用材料有限公司 | Bolting and grouting double-reinforcing mining anchor cable |
| CN103670467A (en) * | 2013-10-29 | 2014-03-26 | 淮南矿业(集团)有限责任公司 | Grouting anchor cable |
| CN104405423A (en) * | 2014-10-23 | 2015-03-11 | 山西晋城无烟煤矿业集团有限责任公司 | Mining grouting anchor rope |
| CN104674808A (en) * | 2015-02-28 | 2015-06-03 | 安徽理工大学 | Novel assembly type hollow grouting anchor bolt and construction method thereof |
| CN205206857U (en) * | 2015-12-21 | 2016-05-04 | 新泰惠众经贸有限公司 | Practical cavity slip casting anchor rope |
| CN209976560U (en) * | 2019-03-08 | 2020-01-21 | 山东焱鑫矿用材料加工有限公司 | Novel hollow grouting anchor cable |
| CN212642773U (en) * | 2020-07-22 | 2021-03-02 | 枣庄市顺翔科技发展有限公司 | Mining anchor rope of cavity slip casting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554921A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Hollow tensioning anchor rod surrounding rock reinforcing method |
| CN112554925A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Stretch-draw slip casting stock |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104481560B (en) | Back water-bearing layer administering method | |
| CN110939456B (en) | High-stress roadway combined ring body beam supporting structure and construction method thereof | |
| CN109882223A (en) | The method for carrying out segmenting slip casting using grouting cable anchor | |
| WO2018161649A1 (en) | Inclined shaft well wall concrete floor prestress loading apparatus | |
| CN212642773U (en) | Mining anchor rope of cavity slip casting | |
| CN109098742B (en) | A kind of list anchor focuses the steel tendon and its method for protecting support of formula full length fastening | |
| CN111720149A (en) | Mining anchor rope of cavity slip casting | |
| CN109268048B (en) | Construction method for improving grouting quality of hollow anchor rod of tunnel anchor | |
| CN105422128A (en) | Method for preventing goaf gas leakage in deep shaft gob-side entry driving | |
| CN111676969A (en) | Foundation pit bag type enlarged footing anchor cable supporting structure and construction method | |
| CN110629856A (en) | Inspection well leakage repairing support tool, back pressure grouting device and repairing method | |
| CN105221170A (en) | Breaking surrounding rock resin anchoring adds sleeve pipe total length cement paste anchor dispensing device and Bolting and grouting methods | |
| WO2019109701A1 (en) | Anchoring method employing multiple anchor bolts to simultaneously inject specific quantities of grout | |
| CN210562163U (en) | Prefabricated prestressed anchor rod piece | |
| WO2014146392A1 (en) | Paste fixed-length anchoring supporting method | |
| CN113738423B (en) | Coal mine tunnel ultrahigh-strength anti-bending shear anchor cable supporting device and supporting method | |
| CN106838463B (en) | The fastener inserts and usage of longitudinal overall stiffness after raising rectangular top plumber | |
| CN111828067A (en) | Expansion anchoring bolt for controlling roadway surrounding rock and using method thereof | |
| WO2024120158A1 (en) | Prefabricated tunnel prestressed anchor, production method and use method therefor | |
| CN205171547U (en) | Recoverable miniature stock wall | |
| CN204511371U (en) | Blender at the bottom of underground coal mine two fluid grouting hole | |
| CN213508499U (en) | Narrow and small space upward formula full length bonding anchor rope downthehole segmentation of formula ends thick liquid structure | |
| CN111502721A (en) | Joint roadway concrete joint supporting structure and construction method thereof | |
| CN204327134U (en) | A kind of prestressing force balance anchor cable | |
| CN207080240U (en) | The quick grouting device of hollow bolt in the range of applicable 360 ° |
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 |