CN107640940A - A kind of filler containing polypropylene fibre and its application in mining with stowing - Google Patents
A kind of filler containing polypropylene fibre and its application in mining with stowing Download PDFInfo
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- CN107640940A CN107640940A CN201710956682.7A CN201710956682A CN107640940A CN 107640940 A CN107640940 A CN 107640940A CN 201710956682 A CN201710956682 A CN 201710956682A CN 107640940 A CN107640940 A CN 107640940A
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Abstract
The invention belongs to filling in mine field of material technology, discloses a kind of application of cemented filling material containing polypropylene fibre in mining with stowing, and present invention also offers a kind of filler, including polypropylene fibre, cement, classification mine tailing and rod milling sand.The present invention also provides a kind of filling slurry, 0.5~1.5 part of polypropylene fibre, 260~327 parts of cement, 1065~1321 parts of mine tailing of classification, 0~203 part of rod milling sand, 484~578 parts of water, 6~12mm of fibre length, filling slurry mass concentration 73~77% after mixing.The incorporation of polypropylene fibre can be effectively improved that obturation cured strength is low in polypropylene fibre cemented filling material disclosed by the invention, problem easy to crack, improve compressive property, the break resistance of obturation, be the innovation of a filling in mine material.
Description
Technical field
The present invention relates to filling in mine field of material technology, and in particular to a kind of filler containing polypropylene fibre and its
Application in mining with stowing.
Background technology
As mineral resources are increasingly exhausted, safety that resources development and utilization constantly triggers, environmental problem, the method for mining by the way of filling by
Step turns into the main trend of mining development.After stope filling, the surrounding rock supporting of obturation and the pressure effect of control ground, to filler
Research and innovation propose higher requirement.
In addition, increasing bargh introduces the large-scale trackless equipments such as scraper, drill jumbo, stope life is being improved
While production capacity power and operating efficiency, performance to workbench obturation is it is also proposed that higher requirement.Bargh is satisfaction
Trackless equipment use condition, it has to the resistance to compression of obturation, tension and shearing strength are improved to increase cement consumption, but not
It is evitable to add filling cost, and the Resisting fractre ability raising effect to obturation is general.
A kind of to solve the above problems, fine tailings disclosed in the Chinese patent document of Application No. 201310035710.3
The binder materials of filling, the binder materials is by belite sulphoaluminate cement, gypsum, quick lime, slag differential, flyash
Deng composition, it is possible to increase the filling intensity of fine tailings, but obturation tensile property and cement consumption reduction problem are not made a search.
Fibrous material is a kind of flexible macromolecule synthetic material, and stability is good, has a variety of excellent properties such as crack resistance, corrosion resistance,
It is used for the cracking resistance for strengthening concrete under construction.Chinese patent document such as Application No. 201310702345.7 discloses
A kind of anti-crack concrete, the anti-crack concrete effectively inhibited because the reasons such as temperature, drying shrinkage are made using fibrous material as additive
Into concrete cracking phenomenon, but in terms of filling in mine, there has been no be used to fibrous material improve obturation mechanical property
Precedent.
The content of the invention
The technical problems to be solved by the invention are low for compression strength existing for mine filler, and cracking resistance is poor,
The problem of cement unit consumption is high, and Mine Tailings Utilization is low, the invention provides a kind of filler containing polypropylene fibre in mining with stowing
In application.By described filler, obturation compression strength, tensile property and shearing strength can be improved, reduces cement
Unit consumption, cost is reduced, improve Mine Tailings Utilization.
In order to solve the above technical problems, technical scheme provided by the invention is as follows：
A kind of application of the filler containing polypropylene fibre, it is applied to as filler in mining with stowing, it is described
Filler is also comprising cement and classification mine tailing.
In the technical field of the method for mining by the way of filling, it is fine that the present inventor originally adds polypropylene in mining filler
Dimension, can obtain the fiber filling material especially suitable for mining with stowing field.Research shows, described polypropylene fibre additive
In addition to it can strengthen filler for mine body compression strength, tensile property and shearing strength, cement unit consumption can be also reduced, filling is saved and uses
Cement cost.
Research shows, the selection of suitable polypropylene fibre, can further lift described filler and be filled in mining area
The application effect in field.
Preferably, described polypropylene fibre is pencil Monofilament polypropylene fibres；Fibre single thread length：6~12mm；It is fine
Tie up fracture strength：＞ 350Mpa；Fiber isotropic modulus：＞ 3.5Gpa.
Preferably, fiber filament diameter：18~20 μm；Fiber average linear density：0.85~0.96g/m3.In the parameter
Under scope, the performance of obtained filler is further lifted.
Further preferably, fibre single thread length is 9~12mm.Under the preferable fibre length, obtained obturation
Properties are more excellent, and help further to reduce cement unit consumption, ensure the good mobility of filling slurry；It is easy to construction to transport
It is defeated.
Most preferably, fibre single thread length is 9mm.
In the present invention, described filler also includes cement and mine tailing.
Preferably, the cement in the filler is PO 42.5R Portland cements.
Further preferably, the classification mine tailing in the filler is that Pb-Zn deposits beneficiation tailing obtains after being classified, filtering
Mine tailing, its grain density is 3.18g/cm3, infiltration coefficient 8.70E-04cm/s, size distribution d10=3.422 μm, d50=
35.42 μm, d90=124.9 μm, dmean=50.59 μm, nonuniformity coefficient Cu=14.01.Mine tailing and institute under the size distribution
Fiber, the synergy of cement stated are more preferable.
In the present invention, the weight ratio of each component of described filler is regulated and controled, contributes to further lifting to fill
The engineering effort of filling chock material.
Preferably, in described filler, the parts by weight of polypropylene fibre are 0.5~1.5 part, the parts by weight of cement
Parts by weight for 260~327 parts, classification mine tailing are 1065~1321 parts.
Preferably, rod milling sand is also included in described filler.Research is found, in described filler, is entered
One step adds rod milling sand, can be cooperateed with compositions such as polypropylene fibres, further lift compression strength, the tension of obtained obturation
The performances such as intensity, shearing strength.
Preferably, coarse aggregate of the described rod milling sand for Pb-Zn deposits barren rock after levigate.Further preferably, described rod
The grain density of frosted is 2.80g/cm3, infiltration coefficient 3.80E-03cm/s, size distribution d10=40.24 μm, d50=
131.8 μm, d90=371.1 μm, dmean=173.0 μm, nonuniformity coefficient Cu=3.98.
In described filler, the parts by weight of rod milling sand are less than or equal to 203 parts.Under the ratio range, contribute to
Improve obturation mechanical property.
Preferably, in described filler, the parts by weight of polypropylene fibre are 1 part, the parts by weight of cement are 265 parts,
The parts by weight for being classified mine tailing are 1189 parts, the parts by weight of rod milling sand are 132 parts.
In the present invention：In the application process of described filler, mixed again with water after each component of filler is mixed
Close, be configured to the filling slurry that mass concentration is 73~77%.
In described filling slurry, described mass concentration refers in slurry, solid portion (polypropylene fibre, cement and tail
The gross weight of ore deposit) mass percent that accounts in described slurry.
In actual application of the present invention, by polypropylene fibre that parts by weight are 0.5~1.5 part, parts by weight be 260~
The rod milling sand of classification mine tailing and parts by weight less than or equal to 203 parts that 327 parts of cement, parts by weight are 1065~1321 parts, again
Measure the water that part is 484~578 parts to mix, obtain described filling slurry, mining area is then fills up to by existing usual manner again
In.
As preferred：The filling slurry density is 2105~2144kg/m3。
As preferred：By described filling slurry using mine drop pipeline pump or self-flowing pastefill by way of carry out
Mining area filling construction.
The described filler containing polypropylene fibre provided by the invention, include each component of following mass fraction：It is poly-
0.5~1.5 part of tacryl, 260~327 parts of cement, 1065~1321 parts of mine tailing of classification, rod milling sand are less than or equal to 203 parts.
Preferable filler, the parts by weight of polypropylene fibre are 1 part, the parts by weight of cement are 265 parts, classification mine tailing
Parts by weight are 1189 parts, the parts by weight of rod milling sand are 132 parts.
Preferable filler, the polypropylene fibre are pencil Monofilament polypropylene fibres, and its physics, chemical property are such as
Under：
Fiber filament diameter：18~20 μm；
Fibre single thread length：6~12mm；
Fiber average linear density：0.85~0.96g/m3；
Fibrous fracture intensity：＞ 350Mpa；
Fiber isotropic modulus：＞ 3.5Gpa；
Resistant fiber acid-base value：It is high；
Preferably, the polypropylene fibre length is 9mm.
Preferable filler, the classification mine tailing are the mine tailing that Pb-Zn deposits beneficiation tailing obtains after being classified, filtering, its
Grain density is 3.18g/cm3, infiltration coefficient 8.70E-04cm/s, size distribution d10=3.422 μm, d50=35.42 μm,
d90=124.9 μm, dmean=50.59 μm, nonuniformity coefficient Cu=14.01.
Preferable filler, coarse aggregate of the rod milling sand for Pb-Zn deposits barren rock after levigate, its grain density are
2.80g/cm3, infiltration coefficient 3.80E-03cm/s, size distribution d10=40.24 μm, d50=131.8 μm, d90=371.1 μ
M, dmean=173.0 μm, nonuniformity coefficient Cu=3.98.
Present invention also offers a kind of filling slurry for mining with stowing, is obtained after being mixed by described filler and water
Arrive.
The described filling slurry for mining with stowing, the parts by weight of each composition are：0.5~1.5 part of polypropylene fibre, water
260~327 parts of mud, 1065~1321 parts of mine tailing of classification, 0~203 part of rod milling sand, 484~578 parts of water.
Further preferably, 1 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, water 529
Part.
Preferably, filling is ordinary tap water with water.
Preferably, the described filling slurry for mining with stowing, mass concentration is 73~77%.
Preferably, the described filling slurry for mining with stowing, density 2114kg/m3, mass concentration 75%.
Present invention also offers a kind of preparation method of the filling slurry for mining with stowing, comprise the following steps：
Step a, by polypropylene fibre, the cement that parts by weight are 260~327 parts, weight that parts by weight are 0.5~1.5 part
Part mixes to obtain compound for 1065~1321 parts of the rod milling sand of classification mine tailing, parts by weight less than or equal to 203 parts；
Step b, the water that parts by weight are 484~578 parts is added in the compound obtained in step a, is stirred, through inspection
Survey it is qualified after obtain filling slurry；
Step c, the filling slurry obtained in step b is entered using mine drop by way of pipeline pumping or self-flowing pastefill
The filling construction of row mining area.
A kind of preparation method being more highly preferred to of the present invention, comprises the following steps：
Step a, by 132 parts of 1 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, rod milling sand addition batch mixers
In be well mixed；
Step b, 529 parts of water is added in the compound obtained in step a, stirs in mixer, closes after testing
Polypropylene fibre filler is obtained after lattice；
Step c, the polypropylene fibre filler that will be obtained in step b, pipeline pump is passed through using mine drop during use
Send or the mode of self-flowing pastefill carries out filling construction.
The incorporation of polypropylene fibre can be effectively improved obturation in polypropylene fibre cemented filling material disclosed by the invention
Cured strength is low, problem easy to crack, improves compressive property, the break resistance of obturation.Use the fiber filling material
The shearing strength of obturation can be improved while resistance to compression, the tensile strength of obturation is improved, meet surrounding rock supporting, it is voltage-controlled
System and large-scale mine drill jumbo, scraper machine equipment service requirement.Every cubic metre of backfilling cement unit consumption is reduced, improves Tailings utilization
Rate, it is a filling in mine material innovation, there is extensive significance of application and promotional value.
Beneficial effect
For the present invention using polypropylene fibre as additive, cement is cementing agent, and it is filling aggregate to be classified mine tailing and rod milling sand, is added
Water be mixed evenly be made the high-strength filler of polypropylene fibre carry out the high intensity such as the Mine Stope first floor, glue surface and false lane will
Region is asked to fill.The addition of pencil Monofilament polypropylene fibres is internally formed the network structure of densification in obturation so that obturation
Class reinforced concrete structure is formed after solidification, obturation overall performance is strengthened, and obturation mechanical property is significantly improved.
Through experiment, polypropylene fibre adds 1 part, when length is 9mm by mass fraction, and under conditions of filling conveying is met, synthesis is examined
Consider material and cost of manufacture, obturation resistance to compression, tension, shear behavior, precipitation mud unit consumption enhancing effect are good.
After addition polypropylene fibre, not only effectively enhance the resistance to compression of obturation, tension,
Shear behavior, and backfilling cement unit consumption is effectively reduced, Mine Tailings Utilization is improved, reduces filling cost, part solves
Mine tailing builds storehouse emission problem, is advantageous to environmental protection.
In summary, the present invention can effectively improve obturation overall performance, be a filling in mine material technology innovation,
With extensive significance of application and promotional value.
Embodiment
With reference to specific embodiment to a kind of filler containing polypropylene fibre provided by the invention in mining with stowing
The technical scheme of application be described in further detail.But the invention is not limited in following examples.
Application of the filler containing polypropylene fibre of the present invention in mining with stowing is by polypropylene fibre, cement, divided
Level mine tailing, rod milling sand and water mix according to certain quality proportioning.Its preparation method is first by polypropylene fibre, water
Mud, classification mine tailing and rod milling sand, which are added in batch mixer, to be well mixed；Then water is added in compound, and is stirred in mixer
Uniformly, the filling slurry of the invention of system.The filling slurry of preparation is cast in Test block is made with 50mm × 50mm × 50mm cylinder and cube die trial, by test block in curing box
According to constant temperature (20 DEG C), constant humidity (95%) maintenance to regulation age (3 days, 7 days and 28 days), determine its compression strength respectively
(useTest block made of mould), tensile strength (useTried made of mould
Block) and shearing strength (using 50mm × 50mm × test block made of 50mm moulds).
Tests below such as non-specified otherwise, preparation, test block preparation and maintenance, the test of filler etc. is according to above-mentioned side
Method, condition are carried out.Non- addition polymerization tacryl in comparative example 1,1-1,1-2,2,2-1,2-2, the control group as the present invention.
Comparative example 1
The present invention's is as follows without polypropylene fibre filler quality proportioning：
319 parts of cement, 1150 parts of mine tailing of classification, 128 parts of rod milling sand, 532 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 1.
The performance measurement result of 1 comparative example of table 1
Comparative example 1-1
The present invention's is as follows without polypropylene fibre filler quality proportioning：
313 parts of cement, 1065 parts of mine tailing of classification, 188 parts of rod milling sand, 579 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 1-1.
Table 1-1 comparative example 1-1 performance measurement results
Comparative example 1-2
The present invention's is as follows without polypropylene fibre filler quality proportioning：
326 parts of cement, 1240 parts of mine tailing of classification, 65 parts of rod milling sand, 488 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 1-2.
Table 1-2 comparative example 1-2 performance measurement results
Analyze comparative example 1, comparative example 1-1 and comparative example 1-2 and understand that obturation compression strength, tensile strength and shearing resistance are strong
Degree increases and strengthened with Quality of filling body concentration.But when mass concentration reaches 77%, obturation mobile performance is poor.
Embodiment 1
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
1 part of polypropylene fibre, 319 parts of cement, 1150 parts of mine tailing of classification, 128 parts of rod milling sand, 532 parts of water.
Polypropylene fibre length 9mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 2.
The performance measurement result of 2 embodiment of table 1
Comparative example 1 and the experimental result of comparative example 1 are understood, after adding described polypropylene fibre, contribute to lifting anti-
Compressive Strength, tensile strength and shearing strength.
Comparative example 2
The present invention's is as follows without polypropylene fibre filler quality proportioning：
265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 3.
The performance measurement result of 3 comparative example of table 2
Comparative example 2-1
The present invention's is as follows without polypropylene fibre filler quality proportioning：
265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 3-1.
Table 3-1 comparative example 2-1 performance measurement results
Comparative example 2-2
The present invention's is as follows without polypropylene fibre filler quality proportioning：
265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Resistance to compression, tension and shearing strength test are carried out to the comparative example, as a result referring to table 3-2.
Table 3-2 comparative example 2-2 performance measurement results
Analyze comparative example 2, comparative example 2-1 and comparative example 2-2 and understand that obturation compression strength, tensile strength and shearing resistance are strong
Degree increases and strengthened with Quality of filling body concentration.But when mass concentration reaches 77%, obturation mobile performance is poor.
Embodiment 2
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
1 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Polypropylene fibre length 9mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 4.
The performance measurement result of 4 embodiment of table 2
Comparative example 2 and comparative example 2 are understood, add described polypropylene fibre, help to lift compression strength, tension
Intensity and shearing strength.In addition, comparative example 1 and comparative example 2 it was found that, reduce the usage amount of cement, intensity decline it is obvious, but
Found by comparative example 1 and embodiment 2, on the premise of cement consumption is reduced, by the addition of described polypropylene fibre, its
Every intensity is close to or the experimental result better than comparative example 1, experiment show, by adding polypropylene fibre, is reducing water
Mud consumption, still obturation can be kept to disclosure satisfy that obturation mechanical property requirements in the case of improving tailings dosage.
Embodiment 3
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
0.5 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Polypropylene fibre length 9mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 5.
The performance measurement result of 5 embodiment of table 3
Comparative example 2 and embodiment 3 are understood, in the case where reducing fiber addition, the compression strength of obturation, are resisted
Tensile strength and shearing strength have reduction, and obturation mechanical property is deteriorated.
Embodiment 4
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
1.5 parts of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Polypropylene fibre length 9mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 6.
The performance measurement result of 6 embodiment of table 4
Comparative example 2 and embodiment 4 are understood, are increased fiber addition, can be improved obturation compression strength, tensile strength
And shearing strength, but increase fiber consumption and improve fiber additive cost.
Embodiment 5
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
1 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Polypropylene fibre length 6mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 7.
The performance measurement result of 7 embodiment of table 5
Comparative example 2 and embodiment 5 are understood, after adjustment polypropylene fibre length is 6mm, its compression strength contrast fiber
Without significant change during length 9mm, but tensile strength and shearing strength reduce substantially, illustrate that increase fibre length is anti-disconnected in raising
It is obvious to split aspect effect.
Embodiment 6
The quality proportioning of filler containing polypropylene fibre of the present invention is as follows：
1 part of polypropylene fibre, 265 parts of cement, 1189 parts of mine tailing of classification, 132 parts of rod milling sand, 529 parts of water.
Polypropylene fibre length 12mm.
Resistance to compression, tension and shearing strength test are carried out to the embodiment, as a result referring to table 8.
The performance measurement result of 8 embodiment of table 6
Comparative example 2 and embodiment 6 are understood, after adjustment polypropylene fibre length is 12mm, the contrast of its compression strength is fine
There is enhancing without significant change, tensile strength and shearing strength when tieing up length 9mm, illustrating, which increases fibre length, is improving Resisting fractre side
Face effect is obvious.But fibre length is long to cause certain detrimental effect to filling mortar mobile performance, it is unfavorable for filling
Slurry pipeline transport.
Explanation embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the technology of this area
For personnel, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in
Within protection scope of the present invention.
Claims (10)
1. a kind of application of the filler containing polypropylene fibre, it is characterised in that be applied to mining with stowing as filler
In, described filler is also comprising cement and classification mine tailing.
2. the application of the filler containing polypropylene fibre as claimed in claim 1, it is characterised in that：Described polypropylene is fine
Tie up as pencil Monofilament polypropylene fibres, fibre single thread length：6~12mm；Fibrous fracture intensity：＞ 350Mpa；Fibrous elasticity mould
Amount：＞ 3.5Gpa.
3. the application of the filler containing polypropylene fibre as claimed in claim 2, it is characterised in that：Fiber filament diameter：
18~20 μm；Fiber average linear density：0.85~0.96g/m3。
4. the application of the filler containing polypropylene fibre as claimed in claim 1, it is characterised in that：It is described classification mine tailing be
The mine tailing that Pb-Zn deposits beneficiation tailing obtains after being classified, filtering, its grain density are 3.18g/cm3, infiltration coefficient 8.70E-
04cm/s, size distribution d10=3.422 μm, d50=35.42 μm, d90=124.9 μm, dmean=50.59 μm, heterogeneous system
Number Cu=14.01.
5. the application of the filler containing polypropylene fibre as claimed in claim 1, it is characterised in that：It is characterized in that：Institute
In the filler stated, the parts by weight of polypropylene fibre are 0.5~1.5 part, the parts by weight of cement are 260~327 parts, classification tail
The parts by weight of ore deposit are 1065~1321 parts.
6. the application of the filler containing polypropylene fibre as described in any one of Claims 1 to 5, it is characterised in that：It is described
Filler in also include rod milling sand.
7. the application of the filler containing polypropylene fibre as claimed in claim 6, it is characterised in that：The rod milling sand is lead
Coarse aggregate after zinc ore barren rock is levigate, its grain density are 2.80g/cm3, infiltration coefficient 3.80E-03cm/s, size distribution
For d10=40.24 μm, d50=131.8 μm, d90=371.1 μm, dmean=173.0 μm, nonuniformity coefficient Cu=3.98.
8. the application of the filler containing polypropylene fibre as claimed in claim 7, it is characterised in that：Described filler
In, the parts by weight of rod milling sand are less than or equal to 203 parts.
9. the application of the filler containing polypropylene fibre as described in any one of claim 1~8, it is characterised in that：Using
During, mixed again with water after each component of filler is mixed, it is 73~77% to be configured to mass concentration, density 2105
~2144kg/m3Filling slurry；
Described filling slurry is carried out into mining area filling by way of pipeline pumping or self-flowing pastefill using mine drop again to apply
Work.
A kind of 10. filler for implementing any one of claim 1~9 methods described.
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| CN112523801A (en) * | 2020-11-23 | 2021-03-19 | 中南大学 | Fiber woven mesh reinforced tailing solidification filling structure and filling process thereof |
| CN113603413A (en) * | 2021-07-16 | 2021-11-05 | 山西晟坤科技发展有限公司 | Concrete filling material for coal mine underground gob-side entry retaining and preparation method thereof |
| CN113816663A (en) * | 2021-09-30 | 2021-12-21 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Fiber-containing composite filler material and concrete member |
| CN114644488A (en) * | 2022-03-16 | 2022-06-21 | 金川集团股份有限公司 | Method for preparing metal ore cemented filling material by using mine solid waste |
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