CN105464668A - Technology for controlling floor heave of soft rock roadway - Google Patents
Technology for controlling floor heave of soft rock roadway Download PDFInfo
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- CN105464668A CN105464668A CN201610030174.1A CN201610030174A CN105464668A CN 105464668 A CN105464668 A CN 105464668A CN 201610030174 A CN201610030174 A CN 201610030174A CN 105464668 A CN105464668 A CN 105464668A
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- Prior art keywords
- grouting
- roadway
- concrete
- soft rock
- bottom plate
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- 239000011435 rock Substances 0.000 title claims abstract description 61
- 238000005516 engineering process Methods 0.000 title abstract description 4
- 239000004567 concrete Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- 230000008093 supporting effect Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000007569 slipcasting Methods 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 210000004911 serous fluid Anatomy 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a technology for controlling a floor heave of a soft rock roadway. Coupling supporting is formed for a bottom plate of the soft rock roadway through multiple supporting methods of grouting cable anchors, inverted arch reinforced concrete ring beams and bottom plate concrete pouring. The technology includes the specific steps that 1, after deformation of surrounding rock of the soft rock roadway is stable, whole-section excavation is conducted on a bottom plate, and the excavation depth is 300 mm larger than the original design size; 2, arc-shaped grooves are excavated in the bottom plate of the roadway every other 2-3 m, the grooves are 1,000 mm far way from the bottom plate in the center of the roadway, and the sizes of the grooves are gradually reduced to 400 mm to the two sides; 3, three grouting anchor cables are driven into each arc-shaped groove, and bottom plate grouting is conducted through the grouting anchor cables; 4, C60 concrete is poured into the arc-shaped grooves, and protective layers with the thickness not smaller than 100 mm are formed; 5, after the grouting anchor cables are pressurized, C40 concrete is poured into the arc-shaped grooves and the bottom plate, and the original design size is achieved. The problem of repeated floor heave deformation and fracture generated after the soft rock roadway is excavated and supported can be effectively solved, repeated maintenance on the soft rock roadway is avoided, and high economic value is achieved.
Description
Technical field
The present invention relates to soft rock roadway support field, particularly relate to a kind of Control Technique of Soft Rock Roadway Floor Heave.
Background technology
The distortion of soft-rock tunnel is one of mining in soft rock mining main harm affecting Safety of Coal Mine Production, and end distension often accounts for more than 3/4ths of Deformation in Soft Rock Tunnel total amount.End distension distortion causes soft-rock tunnel section to reduce, and causes drift closure, affect tunnel and normally use, bring hidden danger to mine safety production time serious.
Country rock squeezing flow, rock expansion, the shearing changing of the relative positions, several mechanism compound action of compaction flexture are formed the end distension of soft-rock tunnel often.The scheme that present stage administers end distension mainly contains by various forms of high strong supportings such as baseboard anchor cable, base plate anchor pole, floor grouting, FLOOR ANCHOR.Many methods often working procedure are complicated and effect is poor, and the end distension of single anchor pole, slip casting often uncontrollable soft-rock tunnel, bring unnecessary trouble also can to repair of laneway process.
As patent 201210472254.4 discloses a kind of simple anchor note technique, this method is poor effect in the end distension of the soft-rock tunnel having ponding or back trickle at roadway floor is administered.Patent 200910030300.3 discloses the method for a kind of base angle anchor note control end distension, and the method only strengthens base angle, but ignores the reinforcing to floor rocks, produces little effect in practical engineering application.
Summary of the invention
The object of the invention is to, a kind of Control Technique of Soft Rock Roadway Floor Heave is provided, effectively can control the end distension of soft-rock tunnel, avoid tunnel constantly to reprocess because of the appearance of end distension phenomenon, ensure safety, the High-efficient Production in colliery, mining in soft rock mining.
Adopting following technical scheme for realizing above object the present invention, specifically comprising the steps:
First: soft-rock tunnel is according to after design size excavation, and base plate is in and opens wide not supporting state, after deformation of the surrounding rock in tunnel speed tends towards stability, every 10 meters is a unit, carry out full face excavation to roadway floor, cutting depth is compared with the dark 300mm of the former design size in tunnel, drift section width 4.5-5m.This process should note the release of pressure from surrounding rock, impels floor rocks crack to reach full growth, and ensures effective diffusion of slurries during slip casting;
Second: the roadway floor excavated, excavate an arcuate furrow, groove apart from the dark 1000mm of terrace at an end, is decremented to 400mm to roadway's sides, ditch groove width 600mm, spacing 2000-3000mm between groove center line and center line in center, tunnel;
3rd: after arcuate furrow digs by design, in arcuate furrow, set three grouting cable anchors, by grouting cable anchor to floor grouting.The cement paste that grouting serous fluid selects 42.5MPa Portland cement to prepare, water/binder ratio 0.6:1, in slip casting process, adds suitable quantity of water glass and controls running pulp amount.Choose the hollow grouting cable anchor of Φ 22mm × 6000mm, improve the stress of roadway floor deep wall rock, improve the resistance to overturning of roadway floor;
4th: by grouting cable anchor to after the slip casting of base plate deep wall rock, by the arched ribs that processes and stirrup colligation at the scene, arched ribs spacing 150mm, every layer 4 side by side, the vertical distance of lower floor's arched ribs distance roadway floor country rock is not less than 100mm, ensures that the exposed parts of grouting cable anchor passes from reinforcing bar hole in process of binding.In arcuate furrow, water C60 concrete, vibrate while water, reinforcing bar wraps up by concrete completely, and reinforcing bar periphery formed be not less than the thick topping of 50mm, rear anchor cable pallet is added to grouting cable anchor exposed parts after pressurize, pretightning force is not less than 120KN.Steel concrete is combined into steel concrete bearing-load arch, and by the prestressing force that grouting cable anchor applies, the bearing pressure transmitted is helped in effective carrying two, improves the stress of floor rocks;
5th: after grouting cable anchor has pressurizeed, to arcuate furrow and base plate pouring C40 concrete extremely former design size, mixing ratio by weight is cement: sand: stone=1:1.62:2.54, ground mixes, underground site adds water stirring, water/binder ratio is 0.37, adds the waterproof agent of concrete gross mass 1 ~ 2%.
The present invention has following beneficial effect:
(1) base plate deep wall rock adopts grouting cable anchor, effectively encloses crack, improves floor rocks stress, improve bearing capacity and the stability of floor rocks;
(2) baseplate reinforcing bar and concrete form arch ring beam of the anti-end, by means of the prestressing force that grouting cable anchor applies, form effective bearing-load arch, improve the stressed of country rock, improve the stability of floor rocks;
(3) the building of underplate concrete, has effectively completely cut off tunnel trickle, base plate ponding etc. to the erosion of base plate, destruction.
Accompanying drawing explanation
Fig. 1 is roadway grouting anchor cable, arch ring beam of the anti-end, underplate concrete section arrangement diagram;
Fig. 2 is the top view of end distension control program;
Fig. 3 is the location diagram of arch ring beam arched ribs of the anti-end and stirrup;
In figure, 1-roadway's sides, 2-terrace, 3-stirrup, 5-grouting cable anchor, 6-anchor cable pallet, 7-base plate, 8-concrete, 9-arched ribs.
Detailed description of the invention
The present invention adopts a kind of slip casting closed bottom wall-rock crack, arch ring beam of the anti-end improves floor rocks stress, improves the end distension integrated control method of country rock self bearing capacity, for realizing the effective control to Soft Rock Roadway Floor Heave.Concrete implementation step is as follows:
First: soft-rock tunnel is according to after design size excavation, and base plate is in and opens wide not supporting state, after deformation of the surrounding rock in tunnel speed tends towards stability, every 10m is a unit, full face excavation is carried out to roadway floor, cutting depth 300mm darker in terrace 2, drift section width 4.5-5m.This process should note the release of pressure from surrounding rock, impels floor rocks crack to reach full growth, and ensures effective diffusion of slurries during slip casting;
Second: the roadway floor excavated, excavate an arcuate furrow, groove apart from the dark 1000mm of terrace, is decremented to 400mm to roadway's sides, ditch groove width 600mm, spacing 2000-3000mm between groove center line and center line in center, tunnel;
3rd: after arcuate furrow digs by design, in arcuate furrow, set three grouting cable anchors 5, by grouting cable anchor 5 to floor grouting.The cement paste that grouting serous fluid selects 42.5MPa Portland cement to prepare, water/binder ratio 0.6:1, in slip casting process, adds suitable quantity of water glass and controls running pulp amount.Grouting cable anchor 5 chooses the hollow grouting cable anchor of Φ 22mm × 6000mm, and every root grouting cable anchor 5 coordinates 3 K2550 type water resistant Anchor Agents, improves the stress of roadway floor deep wall rock, improves the resistance to overturning of roadway floor;
4th: after the slip casting of grouting cable anchor 5 pairs of base plate deep wall rocks, by the arched ribs 9 that processes and stirrup 3 colligation at the scene, arched ribs spacing 150mm, every layer 4 side by side, lower floor's arched ribs 9 is not less than 100mm apart from the vertical distance of roadway floor 7, ensures that the exposed parts of grouting cable anchor 5 passes from reinforcing bar hole in process of binding.In arcuate furrow, water C60 concrete eight, vibrate while water, reinforcing bar wraps up by concrete eight completely, and is formed in reinforcing bar periphery and be not less than the thick topping of 50mm, adds pressurization after anchor cable pallet 6 to grouting cable anchor 5 exposed parts afterwards, and pretightning force is not less than 120KN.Reinforcing bar and concrete eight are combined into steel concrete bearing-load arch, and by the pretightning force that grouting cable anchor 5 applies, the bearing pressure passing to floor rocks is helped in effective carrying two, improves the stability of floor rocks;
5th: after grouting cable anchor has pressurizeed, to arcuate furrow and an end section pouring C40 concrete eight extremely former design size, mixing ratio by weight is cement: sand: stone=1:1.62:2.54, ground mixes, underground site adds water stirring, and water/binder ratio is 0.37, adds the waterproof agent of concrete gross mass 1 ~ 2%, improve the permeability resistance of underplate concrete, reduce the interference of extraneous water to floor rocks.
Base plate release during beginning, effectively facilitates the cranny development of floor rocks, and ensure that effective diffusion of slurries during the slip casting by grouting cable anchor 5 pairs of base plate deep wall rocks, slip casting encloses the crack of deep wall rock, improves the resistance to overturning of floor rocks.Arched ribs 9 and stirrup 3 form the bar construction of section as shown in Figure 3, arch ring beam of the anti-end is formed after this structure placing of concrete, by means of the pretightning force that grouting cable anchor 5 applies, this concrete collar tie beam effectively carries the pressure helping 1 to pass to base plate by two, improves the stress of floor rocks.
The enforcement of the program effectively can prevent Soft Rock Roadway Floor Heave, ensures that large end distension distortion can not occur in tunnel after supports of soft rock excavation, avoid tunnel repeat reprocess, reduce human and material resources and drop into, ensure safety, the High-efficient Production in colliery, mining in soft rock mining.
Claims (3)
1. a Control Technique of Soft Rock Roadway Floor Heave, is characterized in that, comprises the following steps:
(1) soft-rock tunnel is according to after design size excavation, and base plate is in and opens wide not supporting state, after deformation of the surrounding rock in tunnel speed tends towards stability, every 10m is a unit, carry out full face excavation to roadway floor, cutting depth is compared with the dark 300mm of the former design size in tunnel, drift section width 4.5-5m;
(2) roadway floor excavated, excavates an arcuate furrow, and groove apart from the dark 1000mm of terrace at an end, is decremented to 400mm to roadway's sides, ditch groove width 600mm, groove pitch 2000-3000mm in center, tunnel;
(3), after arcuate furrow digs by design, in arcuate furrow, three grouting cable anchors are set, by grouting cable anchor to floor grouting; The cement paste that grouting serous fluid selects 42.5MPa Portland cement to prepare, water/binder ratio 0.6:1, in slip casting process, adds suitable quantity of water glass and controls running pulp amount;
(4) after grouting cable anchor slip casting, by the arched ribs that processes and stirrup colligation at the scene, arched ribs spacing 150mm, every layer 4 side by side, lower floor's arched ribs is not less than 100mm apart from the vertical height of base plate, ensures that the exposed parts of grouting cable anchor passes from reinforcing bar hole in process of binding; In arcuate furrow, water C60 concrete, vibrate while water, reinforcing bar wraps up by concrete completely, and reinforcing bar periphery formed be not less than the thick topping of 50mm, rear anchor cable pallet is added to grouting cable anchor exposed parts after pressurize, pretightning force is not less than 120KN;
(5) after grouting cable anchor has pressurizeed, to arcuate furrow and base plate pouring C40 concrete extremely former design size, mixing ratio by weight is cement: sand: stone=1:1.62:2.54, ground mixes, underground site adds water stirring, water/binder ratio is 0.37, adds the waterproof agent of concrete gross mass 1 ~ 2%.
2. a kind of Control Technique of Soft Rock Roadway Floor Heave according to claim 1, is characterized in that, described grouting cable anchor selects the hollow grouting cable anchor of Φ 22mm × 6000mm.
3. a kind of Control Technique of Soft Rock Roadway Floor Heave according to claim 1, is characterized in that, described arched ribs selects Φ 20-22mm screw-thread steel, and divide two-layer up and down, 4 every layer, every root arched ribs spacing 150mm, is inserted in ready made stirrup; Φ 10mm screw-thread steel selected by stirrup, and ground makes in advance is processed into the rectangle that height × wide is 300 × 450mm, and stirrup and arched ribs infall adopt 14# iron wire and arched ribs colligation to fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610030174.1A CN105464668A (en) | 2016-01-18 | 2016-01-18 | Technology for controlling floor heave of soft rock roadway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610030174.1A CN105464668A (en) | 2016-01-18 | 2016-01-18 | Technology for controlling floor heave of soft rock roadway |
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| CN201610030174.1A Pending CN105464668A (en) | 2016-01-18 | 2016-01-18 | Technology for controlling floor heave of soft rock roadway |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476814A (en) * | 2017-09-28 | 2017-12-15 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction device and method |
| CN109083660A (en) * | 2018-08-22 | 2018-12-25 | 山东建筑大学 | Soft Rock Roadway (tunnel) road pucking based on armored concrete bottom beam administers supporting construction and method |
| CN109268017A (en) * | 2018-09-14 | 2019-01-25 | 中国矿业大学 | A method of control high stress breaking surrounding rock main entry pucking |
| CN110030014A (en) * | 2019-03-18 | 2019-07-19 | 辽宁工程技术大学 | A kind of Soft Rock Roadway Floor Heave allows pressure camber shell administering method |
| CN111502701A (en) * | 2020-04-24 | 2020-08-07 | 哈尔滨龙源河矿山机械技术开发有限公司 | Method for repairing deformed and damaged roadway and roadway structure thereof |
| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
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| CN102797486A (en) * | 2012-08-30 | 2012-11-28 | 中国矿业大学 | Fabricated grilling anti-invert method for treating pucking |
| CN103206224A (en) * | 2013-04-26 | 2013-07-17 | 山东科技大学 | Strong resistance and strong evasion floor heave governing construction method of high-stress large-deformation soft rock drift |
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| CN204253061U (en) * | 2014-06-06 | 2015-04-08 | 安徽理工大学 | The lining cutting of mine working three-dimensional bar frame antiarch |
| CN104533453A (en) * | 2014-12-12 | 2015-04-22 | 山东科技大学 | Substep dynamic coupling support method for roadway fault fracture zone |
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2016
- 2016-01-18 CN CN201610030174.1A patent/CN105464668A/en active Pending
Patent Citations (9)
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| CN101967983A (en) * | 2010-09-03 | 2011-02-09 | 安徽理工大学 | Method for over-dredging, anchoring, backfilling and controlling deep well rock roadway floor heave |
| CN202181908U (en) * | 2011-08-12 | 2012-04-04 | 中国矿业大学 | Expanding soft rock roadway waterproof supporting combined structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476814A (en) * | 2017-09-28 | 2017-12-15 | 滨州学院 | A kind of self-vibration jet grouted anchor bar integrated construction device and method |
| CN107476814B (en) * | 2017-09-28 | 2023-08-25 | 滨州学院 | Integrated construction equipment and method for self-vibration jet grouting anchor rod |
| CN109083660A (en) * | 2018-08-22 | 2018-12-25 | 山东建筑大学 | Soft Rock Roadway (tunnel) road pucking based on armored concrete bottom beam administers supporting construction and method |
| CN109268017A (en) * | 2018-09-14 | 2019-01-25 | 中国矿业大学 | A method of control high stress breaking surrounding rock main entry pucking |
| CN110030014A (en) * | 2019-03-18 | 2019-07-19 | 辽宁工程技术大学 | A kind of Soft Rock Roadway Floor Heave allows pressure camber shell administering method |
| CN111502701A (en) * | 2020-04-24 | 2020-08-07 | 哈尔滨龙源河矿山机械技术开发有限公司 | Method for repairing deformed and damaged roadway and roadway structure thereof |
| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
| CN113006817B (en) * | 2021-05-08 | 2023-06-20 | 上海应用技术大学 | Combined support structure capable of yielding and construction method thereof |
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