CN109681252A - A kind of slip casting combination of steel rope device and construction method - Google Patents
A kind of slip casting combination of steel rope device and construction method Download PDFInfo
- Publication number
- CN109681252A CN109681252A CN201910045731.0A CN201910045731A CN109681252A CN 109681252 A CN109681252 A CN 109681252A CN 201910045731 A CN201910045731 A CN 201910045731A CN 109681252 A CN109681252 A CN 109681252A
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- Prior art keywords
- strand wires
- steel strand
- combination
- slip casting
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 115
- 239000010959 steel Substances 0.000 title claims abstract description 115
- 238000007569 slipcasting Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 238000004873 anchoring Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 10
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
-
- 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
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- 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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to underground coal mine large section roadway secondary supporting fields, specifically related to a kind of slip casting combination of steel rope device and construction method, combination of steel rope device, including guiding cap and steel strand wires, steel strand wires are fixed to be connected on the tail end of guiding cap, steel strand wires at least three, the fixed tail end for being connected to guiding cap of the head end of steel strand wires, that fixes on steel strand wires is equipped with multiple support frames, steel strand wires are divided into anchoring section and tensioning section, plastic flexible pipe is respectively installed in the tensioning section of steel strand wires, method includes drilling, combination cable wire is packed into hole, slip casting and tensioning and etc..Technical solution of the present invention can improve deeper inside rock stress state by using the slip casting combination of steel rope of the high-strength anchor cable composition of 4 12~20m of root long degree, and roadway surrounding rock is closely anchored at deep and is stablized on rock stratum；Then breaking surrounding rock consolidated by high-pressure slip-casting, increase country rock not holding any government official post bearing capacity.Finally, roadway surrounding rock is reduced because destroying caused by unstability, so that it is guaranteed that the stability in tunnel.
Description
Technical field
The invention belongs to underground coal mine large section roadway secondary supporting fields, and in particular to fill to a kind of slip casting combination of steel rope
It sets and construction method.
Background technique
Currently, after single anchor cable loading drilling is usually used, being injected using high pressure in coal mine down-hole tunnel field of reinforcement
Cement slurry.Pretightning force is applied to anchor cable after the solidification of slip casting section, makes the multidirectional compression of country rock, improves stress state, improves country rock
Resistance to deformation damage capability；Meanwhile combination of steel rope plays suspention and combination beam action, and unstable formation around tunnel is anchored at depth
Stablize in rock stratum in portion.Grouting reinforcement technique is broken country rock consolidation to be got up, using the crack in slurries filling country rock to change
Kind surrounding rock structure strengthens Surrounding Rock Strength and improves its mechanical property keeping enclosing steady to increase the bearing capacity of country rock not holding any government official post
It is qualitative.
As coal mining depth increases, crustal stress is gradually increased, and fully-mechanized mining equipment size is also gradually increased, after equipment enters well
Solution body component increases, and underground assembles difficulty and increases, and dedicated big cross section assembling chamber need to be created, especially for support resistance
10000KN assembles chamber width in 6m or more, so big section adds 800m with deep buried depth again, commonly with upper bracket
Support pattern has been unable to maintain that stability of the roadway, needs multiple supporting that can make stability of the roadway.
Summary of the invention
The main purpose of the present invention is to provide a kind of slip casting combination of steel rope device and construction method, with solve existing technology because
Roadway surrounding rock caused by anchor cable or grouting cable anchor anchorage depth are inadequate, anchor force is insufficient and deep rock stratum absciss layer, ultimately cause lane
The problem of road de-stabilise destroys.
To achieve the goals above, the present invention provides a kind of slip casting combination of steel rope device, including guiding cap and steel strand wires,
Steel strand wires are fixed to be connected on the tail end of guiding cap, and the steel strand wires have at least three, the fixed connection of the head end of steel strand wires
In the tail end of guiding cap, that fixes on steel strand wires is equipped with multiple support frames, and support frame is uniformly distributed along steel strand wires length direction, steel
Twisted wire is divided into anchoring section and tensioning section, and plastic flexible pipe, the head end of plastic flexible pipe are respectively installed in the tensioning section of every steel strand wires
It is fixed on steel strand wires using tied silk；Snorkel is provided between steel strand wires, snorkel is more slightly longer than steel strand wires；In tensioning section
Grouting Pipe is additionally provided between steel strand wires.
Further, the guiding cap includes tapered portion and cylindrical portion, and the tapered portion of guiding cap is head end, and cylindrical portion is tail
End.
Further, the anchoring depth of the steel strand wires is 2-2.3 times of tensioning segment length.
Further, the quantity identical as steel strand wires that support frame as described above includes center ring and is uniformly welded on center ring
Reinforcing bar, the reinforcing bar of steel strand wires and support frame fixed by tied silk.
A method of it is constructed using slip casting combination of steel rope device described in claim 1, comprising the following steps:
It drills in step 1, the lane wall between adjacent once supporting bar；
Combination of steel rope is placed in drilling by step 2, checks whether snorkel is unimpeded；
Step 3 is sealed hell, then injects the mixing slurry of cement and waterglass into drilling by Grouting Pipe；
Step 4 is stood after the completion of slip casting, is made even on the lane wall after solidification at injected hole and is installed anchor cable pallet, and to anchor cable into
Row tensioning.
Further, the diameter to drill in the step 1 is 75~94mm, and drilling depth is 12m~20m.
Further, the step 2 specifically: wash with water rock powder in hole, combination of steel rope is manually pushed into bottom hole, push
Exhaust pipe is not damaged in the process and covers the plastic flexible pipe in anchor element tensioning section, and combination of steel rope will check exhaust after being pushed into bottom hole
It whether unimpeded manages.
Further, it after the combination of steel rope promotes, is sealed around hell using cement slurry, snorkel and slip casting
The outer end indwelling of pipe is external in drilling；Cement uses 42.5 ordinary portland cements, and waterglass uses M=2.4~3.2, P=35-
45 ° of Be alkalinity waterglass, grouting pressure control stop slip casting in 4-8MP, when until slurries being discharged in exhaust pipe.
Further, the step 4 specifically: it is levelling and anchor cable pallet is installed around drilling after slip casting 7 days, then
Tensioning is carried out using jack pair combination of steel rope, tensioning should be grouped circulation by root and carry out, and the single final tensioning pretightning force of anchor cable is not
Less than 120KN.
Further, the anchor cable pallet is made of channel steel, and anchor cable pallet includes bottom plate and two side plates, anchor cable pallet
Bottom plate on be provided with anchor cable hole corresponding with combination of steel rope.
The beneficial effects of the present invention are: technical solution of the present invention is by designing a kind of combination of steel rope, by four steel strand wires
It is connected to guiding cap tail end simultaneously, substantially increases the stress intensity of combination of steel rope, it is soft to be set with plastics in the tail end of steel strand wires
Pipe, can effectively prevent steel strand wires, with damage caused by borehole friction, to be arranged between four steel strand wires in stretching process
There is snorkel, the inner end of snorkel is located at guiding cap tail end, the air in drilling can be discharged when slip casting, simultaneously
The instruction device that snorkel can also be completed as slip casting.
Technical solution of the present invention can be with by using the slip casting combination of steel rope of 4 12~20m of root long degree high-strength anchor cable composition
Improve deeper inside rock stress state, and roadway surrounding rock is closely anchored at deep and is stablized on rock stratum；Then pass through high pressure
Breaking surrounding rock is consolidated, increases country rock not holding any government official post bearing capacity by slip casting.Finally, reduce roadway surrounding rock because being destroyed caused by unstability, from
And ensure the stability in tunnel.
Detailed description of the invention
In the accompanying drawings:
Fig. 1 is combination of steel rope side structure schematic diagram of the invention；
Fig. 2 is support frame structure diagram of the invention；
Fig. 3 is support frame side structure schematic view of the invention；
Fig. 4 is construction location structural schematic diagram of the invention；
Fig. 5 is anchor cable tray structure diagram of the invention；
Fig. 6 is combined lockset structural schematic diagram of the invention；
In figure, 1 is guiding cap, and 2 be support frame, and 201 be center ring, and 202 be reinforcing bar, and 3 be steel strand wires, and 4 be snorkel, and 5 be modeling
Expect hose, 6 be Grouting Pipe, and 7 be combination of steel rope, and 8 be lane wall, and 9 be once supporting bar, and 10 be ditch, and 11 be side plate, and 12 be anchor cable
Hole, 13 be bottom plate, and 14 be anchor cable lock, and 15 be lockset hole.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
It should be noted that term " level-one " in description and claims of this specification and above-mentioned attached drawing, " two
Grade " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Term be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
As shown in figs 1 to 6, by taking four steel strand wires as an example, a kind of slip casting combination of steel rope device, including guiding cap 1 and steel are twisted
Line 3, steel strand wires 3 are fixed to be connected on the tail end of guiding cap 1, and guiding cap 1 includes tapered portion and cylindrical portion, the cone of guiding cap 1
Shape portion is head end, and cylindrical portion is tail end.Steel strand wires 3 have four, and what the head end of four steel strand wires 3 was fixed is connected to guiding cap 1
Tail end, that fixes on four steel strand wires 3 is equipped with multiple support frames 2, and support frame 2 is uniformly distributed along steel strand wires length direction, is connected
Two support frames 2 between be spaced 2m, steel strand wires 3 divide for anchoring section and tensioning section, cover respectively in the tensioning section of four steel strand wires 3
Equipped with plastic flexible pipe 5, the head end of plastic flexible pipe 5 is fixed on steel strand wires 3 using tied silk；Ventilation is provided between steel strand wires 3
Pipe 4, snorkel 4 are arranged in parallel with steel strand wires 3, and snorkel 4 is more slightly longer than steel strand wires 3；It is also set up between the steel strand wires 3 of tensioning section
There is Grouting Pipe 6.
In the present embodiment, the anchoring depth of steel strand wires 3 is 2-2.3 times of tensioning segment length, here in embodiment,
A length of 16 meters of steel strand wires, a length of 11m of the anchoring section of steel strand wires 3, the length of tensioning section is 5m.Support frame 2 includes 201 He of center ring
Four reinforcing bars 202 being uniformly welded on center ring 201, steel strand wires 3 and the reinforcing bar 202 of support frame are fixed by tied silk.
17.8~21.8mm of diameter of steel strand wires 3, length 12m~20m of steel strand wires 3, the length and diameter root of steel strand wires 3
Stablize rock stratum according to roadway surrounding rock property, apart from deep depending on.Combination of steel rope further includes an anchor rope supporting plate, and anchor rope supporting plate is used
Steel strand wires 3 are fixed after to 3 tensioning section tensioning of steel strand wires.
A kind of construction method of slip casting combination of steel rope device, including on step 1, the lane wall between adjacent once supporting bar
It is drilled using hydraulic drill rig；Once supporting bar is made of high strength resin bolt in step 1, is consolidated to tunnel shallow-layer palisades
Fixed, once supporting bar can only safeguard the shallow rock stratum within 4m, and the diameter to drill in step 1 is 75~94mm, drilling depth 12m
The quantity of~20m, drilling are set according to demand, and a drilling or two are arranged between adjacent once supporting bar under normal circumstances
Drilling.
Combination of steel rope is placed in drilling by step 2, checks whether snorkel is unimpeded；Specifically: wash with water hole Nei Yan
Powder, is manually pushed into bottom hole for combination of steel rope, and the plastics that exhaust pipe is not damaged during push and is covered in anchor element tensioning section are soft
Pipe, combination of steel rope will check whether exhaust pipe is unimpeded after being pushed into bottom hole.
Step 3 is sealed hell, then utilizes high-pressure injection pump, and cement and waterglass are injected into drilling
Mix slurry；Specifically: after combination of steel rope promotes, it is sealed around hell using cement slurry, snorkel and Grouting Pipe
Outer end indwelling is external in drilling；Cement uses 42.5 ordinary portland cements, and waterglass uses M=2.4~3.2, P=35-45 ° of Be
Alkaline waterglass, grouting pressure control stop slip casting in 4-8MP, when until slurries being discharged in exhaust pipe.
7 days are stood after the completion of step 4, slip casting, makes even on the lane wall after standing at injected hole and anchor cable pallet is installed, and benefit
Tensioning is carried out with jack pair anchor cable；Specifically: it is levelling and anchor cable pallet is installed around drilling after slip casting 7 days, then utilize
Jack pair combination of steel rope carries out tensioning, and tensioning should be grouped circulation by root and carry out, and the single final tensioning pretightning force of anchor cable is not less than
120KN。
Anchor cable pallet is made of channel steel, and anchor cable pallet includes bottom plate 13 and two side plates 11, the bottom plate 12 of anchor cable pallet
On be provided with anchor cable hole 12 corresponding with combination of steel rope, anchor cable lock 14 is installed on anchor cable pallet, anchor cable lock 14 is used for
Four steel strand wires after tensioning are fixed.
The application is described in detail above, it is used herein can principle and embodiment party of the specific case to the application
Formula is expounded, the description of the example is only used to help understand the method for the present application and its core ideas, meanwhile, it is right
In those of ordinary skill in the art, according to the thought of the application, change is had in specific embodiments and applications
Place, in conclusion the contents of this specification should not be construed as limiting the present application.
Claims (10)
1. a kind of slip casting combination of steel rope device, including guiding cap and steel strand wires, the fixed tail end for being connected to guiding cap of steel strand wires
On, it is characterised in that: the steel strand wires have at least three, the fixed tail end for being connected to guiding cap of the head end of steel strand wires, in steel
That fixes on twisted wire is equipped with multiple support frames, and support frame is uniformly distributed along steel strand wires length direction, and steel strand wires are divided into anchoring section and open
Section is drawn, plastic flexible pipe is respectively installed in the tensioning section of every steel strand wires, the head end of plastic flexible pipe is fixed on steel strand using tied silk
On line；Snorkel is provided between steel strand wires, snorkel is more slightly longer than steel strand wires；It is additionally provided between the steel strand wires of tensioning section
Grouting Pipe.
2. slip casting combination of steel rope device according to claim 1, it is characterised in that: the guiding cap includes tapered portion and column
The tapered portion in shape portion, guiding cap is head end, and cylindrical portion is tail end.
3. slip casting combination of steel rope device according to claim 1, it is characterised in that: the anchoring depth of the steel strand wires is
2-2.3 times of tensioning segment length.
4. slip casting combination of steel rope device according to claim 1, it is characterised in that: support frame as described above include center ring and
The reinforcing bar of the reinforcing bar of the even quantity identical as steel strand wires being welded on center ring, steel strand wires and support frame is fixed by tied silk.
5. a kind of utilize the method that slip casting combination of steel rope device is constructed described in claim 1, which is characterized in that including following
Step:
It drills in step 1, the lane wall between adjacent once supporting bar；
Combination of steel rope is placed in drilling by step 2, checks whether snorkel is unimpeded；
Step 3 is sealed hell, then injects the mixing slurry of cement and waterglass into drilling by Grouting Pipe；
Step 4 is stood after the completion of slip casting, is made even on the lane wall after solidification at injected hole and is installed anchor cable pallet, and to anchor cable into
Row tensioning.
6. the construction method of slip casting combination of steel rope device according to claim 5, it is characterised in that: bored in the step 1
The diameter in hole is 75~94mm, and drilling depth is 12m~20m.
7. the construction method of slip casting combination of steel rope device according to claim 5, which is characterized in that the step 2 is specific
Are as follows: rock powder in hole is washed with water, combination of steel rope is manually pushed into bottom hole, exhaust pipe is not damaged during push and is covered in anchor element
Plastic flexible pipe in tensioning section, combination of steel rope will check whether exhaust pipe is unimpeded after being pushed into bottom hole.
8. the construction method of slip casting combination of steel rope device according to claim 5, it is characterised in that: the combination of steel rope pushes away
It into rear, is sealed around hell using cement slurry, the outer end indwelling of snorkel and Grouting Pipe is external in drilling；Cement uses
42.5 ordinary portland cements, waterglass use M=2.4~3.2, P=35-45 ° of Be alkalinity waterglass, and grouting pressure is controlled in 4-
8MP stops slip casting when until slurries being discharged in exhaust pipe.
9. the construction method of slip casting combination of steel rope device according to claim 5, which is characterized in that the step 4 is specific
Are as follows: it is levelling and anchor cable pallet is installed around drilling after slip casting 7 days, then using the progress tensioning of jack pair combination of steel rope, open
Circulation should be grouped by root by, which drawing, carries out, and the single final tensioning pretightning force of anchor cable is not less than 120KN.
10. the construction method of slip casting combination of steel rope device according to claim 9, it is characterised in that: the anchor cable pallet
It is made of channel steel, anchor cable pallet includes bottom plate and two side plates, is provided on the bottom plate of anchor cable pallet corresponding with combination of steel rope
Anchor cable hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045731.0A CN109681252A (en) | 2019-01-17 | 2019-01-17 | A kind of slip casting combination of steel rope device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045731.0A CN109681252A (en) | 2019-01-17 | 2019-01-17 | A kind of slip casting combination of steel rope device and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109681252A true CN109681252A (en) | 2019-04-26 |
Family
ID=66193615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910045731.0A Pending CN109681252A (en) | 2019-01-17 | 2019-01-17 | A kind of slip casting combination of steel rope device and construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109681252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821537A (en) * | 2019-11-29 | 2020-02-21 | 淮矿西部煤矿投资管理有限公司 | Support method for fully-mechanized coal mining face pre-digging single-withdrawing channel |
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