CN102492406A - Nanometer material for plugging coal mines - Google Patents
Nanometer material for plugging coal mines Download PDFInfo
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- CN102492406A CN102492406A CN2011104146206A CN201110414620A CN102492406A CN 102492406 A CN102492406 A CN 102492406A CN 2011104146206 A CN2011104146206 A CN 2011104146206A CN 201110414620 A CN201110414620 A CN 201110414620A CN 102492406 A CN102492406 A CN 102492406A
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- coal
- nanometer material
- plugging
- coal mines
- spray
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a nanometer material for plugging coal mines. The nanometer material consists of tricalcium aluminate, sodium nitrite, silicon dioxide, a propionate copolymerization solution, an adhesive and an additive. The nanometer material has a firm structure, is wide in application range and high in safety and can be used for anti-weathering coating of coal rocks of the coal mines, fissure filling, the cementation of loosened surrounding rocks, the anticorrosion of anchor belt nets of tunnels, the spraying and plugging of the surrounding rocks and the anti-oxidation spontaneous combustion of coal walls.
Description
Technical field
The present invention relates to a kind of coal mine roadway, especially relate to a kind of colliery shutoff nano material.
Background technology
At present, the main sprayed concrete of coal mine roadway, but through field observation and the research of decades, mainly there is following problem in sprayed concrete: (1) rebound of shotcrete amount is big, environment difference and cost are high; (2) trickle of sprayed concrete in can't the shutoff country rock; (3) sprayed concrete is bigger because of the coarse aggregate granularity, can't make it into as a whole in interior hole and the crack of filling country rock; (4) the sprayed concrete density is relatively poor; Simultaneously in process of setting, can produce a large amount of capillary gaps; Can't stop the intrusion of obnoxious flavoures such as deliquescence air, carbon monoxide, hydrogen sulfide and cl ions in the tunnel, cause spray-up not have effective preservative activity anchor band net; (5) during roadway support, because of wire netting and steel band promptly are close to country rock in the lining, the concrete layer of injection outside, in case surrouding rock deformation or danger stone move, wire netting and steel band are easy to split the spray-up merit, causes the concrete layer of injection not have support action; (6) coal road sprayed concrete and rib cohesive force are little, and spray-up weight is prone to become the load by wire netting and steel band suspension, thereby the deflection deformation that has increased wire netting and steel band causes spray-up not have supporting country rock and efflorescence prevention purpose; (7) behind the coal road sprayed concrete,, bigger to the ature of coal influence when working face extraction because of its thickness is bigger.
Summary of the invention
The objective of the invention is:, a kind of applied range, sound construction, colliery shutoff nano material that security is good are provided to the problem that prior art exists.
Technical scheme of the present invention is: shutoff nano material in colliery is made up of following material by weight percentage: tricalcium aluminate 30-40%, Sodium Nitrite 4-6%, silica 1 5-20%, propionic ester copolymer fluid 22-28%, tamanori 10-15%, additive 1-3%, process the high-precision ground and mixed of each component.
The invention has the beneficial effects as follows: the tricalcium aluminate aquation is rapid among the present invention, heat release big, it is fast to condense, and the rust inhibition of Sodium Nitrite is very strong, and it is stable with well that silicon-dioxide has very high hardness; Have good unreactiveness and heating power stability; The propionic ester copolymer fluid has excellent workability, each reasonable mixture ratio of components, and cost is low; Easy construction, excellent performance.Outstanding performance has: (1) density is high, it is fast to solidify, trickle and water exit in can the quick blocking roadway surrounding rock; (2) cohesive force is strong, reaches 13.84MPa with the cohesion of Q235 reinforcing bar, reaches 3.68MPa and 37.2MPa respectively with the cohesion of coal body and sandstone; (3) ultimate compression strength reaches 87.2MPa, is 4.36 times of C20 concrete crushing strength; (4) each item index of fire retardancy test meet the specifications GB-5464-85 requirement belongs to non-combustible material; (5) enclosing tunnel rapidly country rock been has promptly has been prevented and treated the loose damage that the country rock weathering brings, and has avoided the lax supporting intensity that brings of anchor pole exposed junction to descend again, has guaranteed effective control in tunnel; (6) hole crack or the loose damage in the filling country rock, can with country rock gluing fast together, make roadway surrounding rock form a stable carrying arch, can give full play to its self-supporting ability, this is that traditional whitewashing can't realize; (7) to after rib or the coal body spraying, effectively secluding air has prevented the coal oxidation spontaneous combustion; (8) pollution-free, the no dust of material, antistatic, anti-fire-retardant, construction environment good and operating efficiency is 12 times of traditional gunite material; (9) material do not have that resilience, consumption are few, easy construction, labour intensity, its cost is about 1/3 of a whitewashing cost.The present invention can be used for that the spraying of colliery coal petrography efflorescence prevention, crack are filled, loosening country rock is glued, tunnel anchor band net is anticorrosion, the shutoff of country rock trickle and the anti-oxidation spontaneous combustion of rib.
Embodiment
Embodiment 1: the present invention is made up of following material by weight percentage: tricalcium aluminate 37%, Sodium Nitrite (NaNO
2) 4.65%, silicon-dioxide (SiO
2) 18%, propionic ester copolymer fluid 25%, SG-909 tamanori 13.97%, each additive 1.38%, the high-precision ground and mixed of each component is processed.
Product operation instruction: the colliery shutoff nano material of processing and the water ratio in 1:0.45 is stirred in stirrer until mixing, will spray on the workplace through spraying machine.
Construction requirement: should adopt plastic cloth or waste woven bag that the equipment in the lane, pipeline and air duct are covered before (1) spraying; In order to avoid that slurries fall into is contaminated; Dispose instrument with some the danger stones or the coal cinder on country rock surface with long simultaneously, avoid being with mud jacking liquid to impact the back and fall phenomenons such as piece.(2) shower nozzle is from should being kept about 1m by spray plane when spraying, shower nozzle with receive spray plane to be miter angle, spray a segment distance towards the direction in tunnel earlier after, the other direction spraying one time towards the tunnel is later sprayed tight to guarantee the anchor band net back side again.(3) the spraying personnel should all fastly move shower nozzle, spray thick 2-5mm and even, avoid leaving the dead angle or spray not tight.(4) according to the different spray planes (lane group or top, lane) that receive, should suitably adjust shower nozzle slurries top hole pressure, its blast should >=0.5MPa.
Present embodiment through testing its performance is:
(1) neutral salt spray test: to Q235 reinforcing bar spraying 2mm, in case, behind 170kPa pressure, 96 hours the neutral salt spray test, take out sample and observe at microscopically, any corrosion sign does not appear in the Q235 reinforcing bar.(2) electrochemical test: the corrosion current that records sample is 0.192 μ A/cm
2, less than 0.2 μ A/cm
2, will have permanent preservative activity to tunnel anchor band net.(3) cohesion test: the cohesive force that records Q235 reinforcing bar and this nano material reaches 3.84MPa.Mechanics index of physics such as (4) resistance to compression, tension, toughness and cohesion are concrete 6 ~ 8 times of conventional spray.(5) according to test in place, coating thickness 2mm on roadway surrounding rock, per tour 4 people can spray 70m, satisfy the construction requirement of tunnel speedy drivage fully, and construction environment is good, and operating efficiency is concrete 13 times an of conventional spray.
Embodiment 2: the present invention is made up of following material by weight percentage: tricalcium aluminate 35%, Sodium Nitrite 6%, silicon-dioxide 20%, propionic ester copolymer fluid 22%, SG-909 tamanori 15%, additive 2%, the high-precision ground and mixed of each component is processed.Product operation instruction and construction requirement are identical with embodiment 1.
Embodiment 3: the present invention is made up of following material by weight percentage: tricalcium aluminate 40%, Sodium Nitrite 4%, silica 1 7%, propionic ester copolymer fluid 28%, SG-909 tamanori 10%, additive 1%, the high-precision ground and mixed of each component is processed.Product operation instruction and construction requirement are identical with embodiment 1.
Embodiment 4: the present invention is made up of following material by weight percentage: tricalcium aluminate 39%, Sodium Nitrite 5%, silica 1 5%, propionic ester copolymer fluid 26%, SG-909 tamanori 12%, additive 3%, the high-precision ground and mixed of each component is processed.Product operation instruction and construction requirement are identical with embodiment 1.
Embodiment 5: the present invention is made up of following material by weight percentage: tricalcium aluminate 36%, Sodium Nitrite 5%, silica 1 8%, propionic ester copolymer fluid 24%, SG-909 tamanori 15%, additive 2%, the high-precision ground and mixed of each component is processed.Product operation instruction and construction requirement are identical with embodiment 1.
Embodiment 6: the present invention is made up of following material by weight percentage: tricalcium aluminate 30%, Sodium Nitrite 6%, silica 1 9%, propionic ester copolymer fluid 27%, SG-909 tamanori 15%, additive 3%, the high-precision ground and mixed of each component is processed.Product operation instruction and construction requirement are identical with embodiment 1.
Claims (1)
1. colliery shutoff nano material; It is characterized in that; Form by following material by weight percentage: tricalcium aluminate 30-40%, Sodium Nitrite 4-6%, silica 1 5-20%, propionic ester copolymer fluid 22-28%, tamanori 10-15%, additive 1-3%, process the high-precision ground and mixed of each component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104146206A CN102492406A (en) | 2011-12-13 | 2011-12-13 | Nanometer material for plugging coal mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104146206A CN102492406A (en) | 2011-12-13 | 2011-12-13 | Nanometer material for plugging coal mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102492406A true CN102492406A (en) | 2012-06-13 |
Family
ID=46184270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104146206A Pending CN102492406A (en) | 2011-12-13 | 2011-12-13 | Nanometer material for plugging coal mines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102492406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912285A (en) * | 2014-03-27 | 2014-07-09 | 神华集团有限责任公司 | Coal mine roadway blocking method |
-
2011
- 2011-12-13 CN CN2011104146206A patent/CN102492406A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912285A (en) * | 2014-03-27 | 2014-07-09 | 神华集团有限责任公司 | Coal mine roadway blocking method |
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Application publication date: 20120613 |
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| WD01 | Invention patent application deemed withdrawn after publication |