CN106007569B - A kind of method that coal mine filling lotion is prepared using biological material - Google Patents

A kind of method that coal mine filling lotion is prepared using biological material Download PDF

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CN106007569B
CN106007569B CN201610335922.7A CN201610335922A CN106007569B CN 106007569 B CN106007569 B CN 106007569B CN 201610335922 A CN201610335922 A CN 201610335922A CN 106007569 B CN106007569 B CN 106007569B
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powder
coal
coal mine
biological material
gangue
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CN106007569A (en
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戚庭野
宋凯歌
冯国瑞
刘国艳
杜献杰
郭育霞
白锦文
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Taiyuan University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries

Abstract

The invention discloses a kind of method that coal mine filling lotion is prepared using biological material, belong to cemented filling material technical field.This method includes：（1）Prepare biomass powder；（2）Handle gangue；（3）Coal gangue powder is mixed with biomass powder, flyash, obtains mixed powder particle；（4）By Na2SO4, quick lime and gypsum solid and mixed powder particle mixing and ball milling, obtain the admixture of fill paste；（5）Above-mentioned admixture is taken to be stirring evenly and then adding into water and conditioning agent with cement, thick, the fine aggregate of gangue, up to coal mine filling lotion.Biological material is added in fill paste by the present invention, improves the working performance and compression strength of material；While preserving the ecological environment, more sufficient cheap raw material is provided for coal mine filling exploitation, the performance of paste filling material is improved, reduces filling cost.

Description

A kind of method that coal mine filling lotion is prepared using biological material
Technical field
The present invention relates to a kind of method that coal mine filling lotion is prepared using biological material, belong to cemented filling material skill Art field.
Background technology
In recent years due to China's rate of economic development slows down and environmental pollution, government policy, green energy resource development and The influence of the factors such as coal resources import volume increase, makes society decline coal demand, and coal resources production capacity is superfluous, coal valency There is serious drop in lattice.But coal is still the main energy sources in China, and recent statistics are the results show that coal in China consumption in 2015 Still account for the 64% of total energy consumption proportion.How efficiently, environmental protection, the development coal production of safety are exploitation of coal resources mistakes The matter of utmost importance faced in journey.At the same time, " under three " of China's coal-mine underground（Building, railway, water body）Pressure coal amount be 137.9 hundred million tons, the 69% of overall pressure coal amount is accounted for, these greatly influence and constrain coal mining and industry development.
The development of paste filling material and the optimization of performance be the technology can smoothly implement and the weight efficiently gone into operation in it Weight.Paste body filling production technique is to optimize one or more fillers with water to combine, and is configured to have good stablize The paste body shape adhesive bond of property, mobility and plasticity, in gravity or applied force（Pump pressure）Conveyed under effect in the form of plug flow The process of packing job is completed to goaf, wherein filler is the basis of paste body filling, but the filler used at present Generally gangue, flyash, mine tailings, clinker and cement etc., these fillers are small due to carrying out source range, quantitatively It is difficult to the needs for meeting paste body filling, seriously constrains implementing in full for filling mining technology, therefore, finds one or more of next Source range is wide, cost is low, meet fill paste conveying and the filler of intensity requirement is filling mining urgent problem.
China is a large agricultural country, and crop genetic resource enriches.According to statistics, China's rice yield in 2015 is 2.08 hundred million Ton, cultivated area account for the 19% of the whole world.However, being continuously increased with farm output, agricultural wastes also increase therewith, according to Relevant report, agricultural stalk annual yield is up to 6,400,000,000 tons, in addition to small part is used for papermaking, sheet fabrication, most of stalk Resource is fallen into disuse or on-site incineration, not only landed property, while also produces a large amount of dusts and CO2, local environment is made Into serious destruction.Agricultural crop straw contains abundant cellulose, hemicellulose and lignin etc., its fibre structure is close, There are preferable toughness and tensile strength.Above property based on biomass straw, can mix in concrete improving its mechanics Performance, since it is internal in three-dimensional random distribution, when early stage is by crack caused by contraction strain, fiber can cross over microcrack Load is transmitted in region, improves inside concrete Stress Field Distribution, the kinetic energy consumption of increase crack extension, and then restraint crack expands Exhibition;At the same time when concrete bears external pull, internal plant fiber can provide drawknot tension, absorb concrete surface Stress at crack, and then improve the performance of resisting cracking and tensile property of concrete.Concrete and paste filling material are equally with water Mud is cementitious material, but biomass is rarely reported applied to paste filling material.Therefore, shadow of the biomass to concrete performance Ringing the development for biomass fill paste material has important reference value.
It is the trend of the times of following Coal Industrial in conclusion implementing the Green Mining Technology in colliery.Solid waste goods and materials Sourceization utilizes and prepares filler, it has also become the important development direction of the difference subject collaborative innovation such as mining, environment, material.
The content of the invention
The object of the present invention is to provide a kind of method that coal mine filling lotion is prepared using biological material, protecting ecology ring While border, more sufficient cheap raw material is provided for coal mine filling exploitation, the performance of paste filling material is improved, reduces Filling cost.
The present invention provides a kind of method that coal mine filling lotion is prepared using biological material, comprise the following steps：
（1）Prepare biomass powder：
The method wrapped to the biological material of collection using thin layer is pre-processed, i.e., to stalk surface, uniformly spray is matched somebody with somebody The mass concentration made is the sodium silicate aqueous solution of 3.8%-4.7%, is stirred in spray, ensures the uniform wet of raw material；So Afterwards, the stalk prewetted is put into mixer and be stirred, and thin layer is made in stirring thing natural curing 24-26 h and wraps up in shell straw Stalk, finally wraps up in the biomass powder that shell stalk is broken into below 1mm with vibrating screen by manufactured thin layer；
The biological material is included in the stalk of cereal in agricultural production process；Cereal include corn, wheat, rice, Soybean or sorghum；
（2）Handle gangue：
Coal shale in brick making is collected, and break process is carried out to gangue, with mesh is successively then 15mm, 5mm and 1mm Vibrating screen is sieved, and obtains coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm that particle diameter is 5 ~ 15mm；More than 15mm Particle return it into vibrating screen and re-start break process；
（3）By above-mentioned steps（2）In the obtained Coal gangue powder and step of below 1mm（1）Obtained biomass powder, Flyash mixes, and the quality proportioning of wherein each component is：
Biomass powder：43% ~ 53%,
Less than 1mm Coal gangue powders：15% ~ 25%,
Flyash：30%~35%；
Three be sufficiently mixed latter ball milling 25-30 minutes, the specific surface area of the mixed powder particle after ball milling should >= 325 m2/ kg,
（4）By Na2SO4, quick lime and gypsum solid and above-mentioned steps（3）Obtained mixed powder particle mixing and ball milling, its The quality proportioning of middle each component is：
Na2SO4：5% ~ 10%,
Mixed powder particle：62%~75%；
Quick lime solid：10%-19%
Gypsum solid：6%~13%；
Ball-milling Time is 25-70 minutes, specific surface area >=335m of gained superfine powder2/ kg, is fill paste Admixture；
（5）Take above-mentioned steps（4）Obtained admixture is stirring evenly and then adding into water with cement, thick, the fine aggregate of gangue And conditioning agent, the quality proportioning of wherein each component are：
Coarse aggregate：26%~36% ；
Fine aggregate：13%~23%；
Admixture：25%~40%；
Cement：5%~10%；
Water：10%~28%；
Conditioning agent：0.8%~5.2%；
Uniformly mixing, that is, obtain the coal mine filling lotion that mass concentration is 77% ~ 82%.
In the above method, the step（1）Humidity reaches the micro- moistening of material surface after pretreatment.
In the above method, the natural curing refers to：According to outside air temperature concrete material prepare after 3- Concrete is covered with straw screen or mat, reed mat, gunnysack, sawdust, wet soil and damp sand material in 12h, and often watering keeps moistening.
In the above method, the step（5）In cement be normal silicate 425# cement.
In the above method, the step（5）In conditioning agent be made of water-reducing agent, early strength agent, swelling agent and retarder.Into One step, the water-reducing agent is melamine high-efficiency water-reducing agent, early strength agent is calcium chloride, swelling agent be calcium oxide-calcium sulphoaluminate, Retarder is wooden calcium iodate, and the quality proportioning of each component is：
Melamine high-efficiency water-reducing agent：18%-32%
Calcium chloride：40%-55%
Calcium oxide-calcium sulphoaluminate：20%-35%
Wooden calcium iodate：0.7%-3.9%.
The biological material that the present invention uses is used as solid waste in itself, derives from a wealth of sources, cheap, and crops straw Containing abundant cellulose, hemicellulose and lignin etc. in stalk, its fibre structure is close, has the preferable toughness and tension strong Degree, can improve the performance of resisting cracking and tensile property of paste filling material；Biological material is added in fill paste, is improved The working performance and compression strength of material.
Beneficial effects of the present invention：
（1）Biological material is used as solid waste in itself, derives from a wealth of sources, and has widened the source of filling raw material, realizes Biological material prepares the utilization of coal mine paste filling material technology, reduces filling cost, is the complete of filling mining technology Implement to lay a good foundation in face；In addition biomass castoff is recycled, and solves biomass castoff to environment, soil Destruction；
（2）Because of the water absorption character of biomass fiber itself, discharge, improve inside it in paste filling material maintenance processes Structural constituent condition, reduces water translocation, reduces the porosity of paste filling material；
（3）Since the proportion of composing between gangue, flyash and different biomass has differences, and can be added by adjusting Add the proportionate relationship of each constituent of agent, so that the biomass paste filling material prepared has optimal mobility and power Characteristic is learned, suitable for different mining areas, and makes to enrich the obturation that is formed behind goaf and has and preferably connect top effect；
（4）Environmental pollution caused by the present invention can slow down solid waste discharge and boosting filling mining technology into Ripe conversion is simultaneously promoted, and is driven related industry fast-developing, is produced huge environmental benefit, Social benefit and economic benefit.
Embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiments.
Embodiment 1：
（1）Maize straw is collected as biological material, and the method for using thin layer to wrap it pre-processes, i.e., to Uniformly spray prepares the sodium silicate aqueous solution that mass concentration is 3.9% on the stalk surface of 2.5kg, stirs, ensures former in spray The uniform wet of material, then, the stalk prewetted is put into mixer and is stirred, and by 24 h systems of stirring thing natural curing Shell stalk is wrapped up in into thin layer, manufactured thin layer is finally wrapped up in into the biomass powder that shell stalk is broken into below 1mm with vibrating screen, is taken Biomass powder 2.2kg, while coal shale in brick making 10kg is collected, the mass ratio of the two is 1.1:5；
（2）To above-mentioned steps（1）The gangue of middle collection carries out break process, is then 15mm, 5mm and 1mm with mesh Vibrating screen sieved, obtain spoil particle diameter be 5 ~ 15mm coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm；Greatly Vibrating screen, which is returned it into, in the particle of 15mm re-starts break process；
（3）To step（2）Obtained particle diameter adds biomass powder, flyash in the Coal gangue powder less than 1mm, mixes Ball mill, which is sent into, after closing uniformly carries out ball milling, 25 minutes obtained specific surface area >=325m of ball milling2The mixed powder of/kg, wherein Coal gangue powder less than 1mm is 0.8kg, flyash 1.3kg, 2.2 kg of biomass powder；
（4）By 0.42kg Na2SO4Powder, 0.92kg calcium lime powders, 0.56kg land plasters and above-mentioned steps（3）Middle gained Mixed powder be mutually mixed ball milling, Ball-milling Time is 45 minutes, specific surface area >=335m of gained superfine powder2/kg；
（5）Take 1.5kg normal silicate 425# cement and 3.3kg fine aggregates obtained above, 5.9kg coarse aggregates and 6.2kg superfine powders are stirring evenly and then adding into 4.68kg water and 613g conditioning agents, and wherein conditioning agent is：159.38g melamine Amine high efficiency water reducing agent, 288.11g calcium chloride, 148.96g calcium oxide-calcium sulphoaluminate composite expanding agent, the wooden calcium iodates of 16.55g Composition, uniformly mixing, that is, obtain the coal mine filling lotion that mass concentration is 79%.
Embodiment 2：
（1）Wheat stalk is collected as biological material, and the method that wraps of use thin layer is pre-processed, i.e., to The stalk surface of 7kg uniformly sprays the sodium silicate aqueous solution that prepared concentration is 4.3%, is stirred in spray, ensures raw material Uniform wet and there is certain humidity, then, the stalk prewetted is put into mixer and be stirred, and stirring thing is natural Conserve 24 h thin layer has been made and wrap up in shell stalk, manufactured thin layer is finally wrapped up in into the life that shell stalk is broken into below 1mm with vibrating screen Material powder, takes biomass powder 2.5kg, while collects coal shale in brick making 10kg, and the mass ratio of the two is 1:4；
（2）To above-mentioned steps（1）The gangue of middle collection carries out break process, is then 15mm, 5mm and 1mm with mesh Vibrating screen sieved, obtain spoil particle diameter be 5 ~ 15mm coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm.Greatly Vibrating screen, which is returned it into, in the particle of 15mm re-starts break process；
（3）To step（2）Obtained particle diameter adds biomass powder, flyash in the Coal gangue powder less than 1mm, mixes Ball mill, which is sent into, after closing uniformly carries out ball milling, 25 minutes obtained specific surface area >=325m of ball milling2/ kg mixed powders, its is medium and small In the Coal gangue powder of 1mm be 0.85kg, flyash 1.65kg, biomass powder 2.5kg；
（4）By 0.49kg Na2SO4Powder, 0.82kg calcium lime powders, 0.49kg land plasters and above-mentioned steps（3）Middle gained Mixed powder be mutually mixed ball milling, Ball-milling Time is 45 minutes, specific surface area >=335m of gained superfine powder2/kg；
（5）Take 1.6kg normal silicate 425# cement and 2.85kg fine aggregates obtained above, 6.3kg coarse aggregates And 6.8kg superfine powders are stirring evenly and then adding into 5.12kg water and 613g conditioning agents, wherein conditioning agent is：159.38g trimerization Cyanamide high efficiency water reducing agent, 288.11g calcium chloride, 148.96g calcium oxide-calcium sulphoaluminate composite expanding agent, the wooden acid iodide of 16.55g Calcium forms, uniformly mixing, that is, obtains the coal mine filling lotion that mass concentration is 78%.
Embodiment 3：
（1）Rice rice husk is collected as biological material, and the method for using thin layer to wrap it pre-processes, i.e., to The stalk surface of 2.5kg uniformly sprays the sodium silicate aqueous solution that prepared concentration is 4.5%, is stirred in spray, ensures former material The uniform wet of material, then, the stalk prewetted is put into mixer and is stirred, and 24 h of stirring thing natural curing is made Thin layer wraps up in shell stalk, and manufactured thin layer finally is wrapped up in the biomass powder that shell stalk is broken into below 1mm with vibrating screen, takes this Biomass powder 2kg, while coal shale in brick making 10kg is collected, the mass ratio of the two is 1:5；
（2）To above-mentioned steps（1）The gangue of middle collection carries out break process, is then 15mm, 5mm and 1mm with mesh Vibrating screen sieved, obtain spoil particle diameter be 5 ~ 15mm coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm；Greatly Vibrating screen, which is returned it into, in the particle of 15mm re-starts break process；
（3）To step（2）Obtained particle diameter adds biomass powder, flyash in the Coal gangue powder less than 1mm, mixes Ball mill, which is sent into, after closing uniformly carries out ball milling, 25 minutes obtained specific surface area >=325m of ball milling2The mixed powder of/kg, wherein Coal gangue powder less than 1mm is 0.8kg, flyash 1.34kg, 2 kg of biomass powder；
（4）By 0.42kg Na2SO4Powder, 0.9kg calcium lime powders, 0.54kg land plasters and above-mentioned steps（3）Middle gained Mixed powder is mutually mixed ball milling, and Ball-milling Time is 45 minutes, specific surface area >=335m of gained superfine powder2/kg；
（5）Take 1.5kg normal silicate 425# cement and 3.3kg fine aggregates obtained above, 5.9kg coarse aggregates and 6kg superfine powders are stirring evenly and then adding into 4.53kg water and 549g conditioning agents, and wherein conditioning agent is：137.25g melamine High efficiency water reducing agent, 263.52g calcium chloride, one calcium sulphoaluminate composite expanding agent of 142.74g calcium oxide, the wooden calcium iodate groups of 5.49g Into uniformly mixing, that is, obtain the coal mine filling lotion that mass concentration is 79%.
Embodiment 4：
（1）Soybean, broomcorn straw are collected as biological material, and the method for using thin layer to wrap to it is located in advance Reason, i.e., uniformly spray the sodium silicate aqueous solution that prepared concentration is 4.7% to the stalk surface of 2.5kg, is stirred in spray, Ensure the uniform wet of raw material, then, the stalk prewetted is put into mixer and is stirred, and by stirring thing natural curing 24 h have been made thin layer and have wrapped up in shell stalk, and manufactured thin layer finally is wrapped up in the biomass that shell stalk is broken into below 1mm with vibrating screen Powder, takes biomass powder 1.6kg, while collects coal shale in brick making 10kg, and the mass ratio of the two is 4:25；
（2）To above-mentioned steps（1）The gangue of middle collection carries out break process, is then 15mm, 5mm and 1mm with mesh Vibrating screen sieved, obtain spoil particle diameter be 5 ~ 15mm coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm；Greatly Vibrating screen, which is returned it into, in the particle of 15mm re-starts break process；
（3）To step（2）Obtained particle diameter adds biomass powder, flyash in the Coal gangue powder less than 1mm, mixes Ball mill, which is sent into, after closing uniformly carries out ball milling, 25 minutes obtained specific surface area >=325m of ball milling2The mixed powder of/kg, wherein Coal gangue powder less than 1mm is 0.77kg, flyash 1.27kg, 1.6 kg of biomass powder；
（4）By 0.51kg Na2SO4Powder, 0.57kg calcium lime powders, 0.48kg land plasters and above-mentioned steps（3）Middle gained Mixed powder be mutually mixed ball milling, Ball-milling Time is 45 minutes, specific surface area >=335m of gained superfine powder2/kg；
（5）Take 1.3kg normal silicate 425# cement and 3.63kg fine aggregates obtained above, 5.6kg coarse aggregates And 5.2kg superfine powders are stirring evenly and then adding into 4.37kg water and 701g conditioning agents, wherein conditioning agent is：154.22g trimerization Cyanamide high efficiency water reducing agent, 343.49g calcium chloride, one calcium sulphoaluminate composite expanding agent of 178.25g calcium oxide, the wooden acid iodide of 25.04g Calcium forms, uniformly mixing, that is, obtains the coal mine filling lotion that mass concentration is 79%.
Shown according to experimental data content in table, add the strength of filling mass after biological material in the range of allowable strength With faint increase, the utility model filler adds biomass castoff, instead of the industrial chemistry material such as part of cement, protects Retaining ring border, while economize on resources with cost, beneficial to Safety of Coal Mine Production, effectively reduce subsidence after exploitation.

Claims (5)

  1. A kind of 1. method that coal mine filling lotion is prepared using biological material, it is characterised in that：Comprise the following steps：
    （1）Prepare biomass powder：
    The method wrapped to the biological material of collection using thin layer is pre-processed, i.e., to stalk surface, uniformly spray prepares Mass concentration be 3.8%-4.7% sodium silicate aqueous solution, while spray while stir, ensure the uniform wet of raw material；Then, will It is stirred in the stalk input mixer prewetted, and thin layer is made in stirring thing natural curing 24-26 h and wraps up in shell stalk, finally Manufactured thin layer is wrapped up in into the biomass powder that shell stalk is broken into below 1mm with vibrating screen；
    The biological material is the stalk of the cereal in agricultural production process；
    （2）Handle gangue：
    Coal shale in brick making is collected, and break process is carried out to gangue, then successively with the vibration that mesh is 15mm, 5mm and 1mm Sieved, obtain coarse aggregate, the fine aggregate of 1 ~ 5mm and the powder of below 1mm that particle diameter is 5 ~ 15mm；More than 15mm Grain returns it into vibrating screen and re-starts break process；
    （3）By above-mentioned steps（2）In the obtained Coal gangue powder and step of below 1mm（1）Obtained biomass powder, fine coal Ash mixing, the quality proportioning of wherein each component are：
    Biomass powder：43% ~ 53%,
    Less than 1mm Coal gangue powders：15% ~ 25%,
    Flyash：30%~35%；
    Three be sufficiently mixed latter ball milling 25-30 minutes, and the specific surface area of the mixed powder particle after ball milling answers >=325m2/ Kg,
    （4）By Na2SO4, quick lime and gypsum solid and above-mentioned steps（3）Obtained mixed powder particle mixing and ball milling, wherein respectively The quality proportioning of component is：
    Na2SO4：5% ~ 10%,
    Mixed powder particle：62%~75%；
    Quick lime solid：10%-19%
    Gypsum solid：6%~13%；
    Ball-milling Time is 25-70 minutes, specific surface area >=335m of gained superfine powder2/ kg, is the blending of fill paste Material；
    （5）Take above-mentioned steps（4）Obtained admixture is stirring evenly and then adding into water and tune with cement, thick, the fine aggregate of gangue Agent is saved, the quality proportioning of wherein each component is：
    Coarse aggregate：26%~36% ；
    Fine aggregate：13%~23%；
    Admixture：25%~40%；
    Cement：5%~10%；
    Water：10%~28%；
    Conditioning agent：0.8%~5.2%；
    Uniformly mixing, that is, obtain the coal mine filling lotion that mass concentration is 77% ~ 82%.
  2. 2. the method according to claim 1 that coal mine filling lotion is prepared using biological material, it is characterised in that：It is described Natural curing refer to：According to outside air temperature concrete material prepare after 3 ~ 12h straw screen or mat, reed mat, gunnysack, sawdust, Wet soil and damp sand material cover concrete, and often watering keeps moistening.
  3. 3. the method according to claim 1 that coal mine filling lotion is prepared using biological material, it is characterised in that：It is described Step（5）In cement be normal silicate 425# cement.
  4. 4. the method according to claim 1 that coal mine filling lotion is prepared using biological material, it is characterised in that：It is described Step（5）In conditioning agent be made of water-reducing agent, early strength agent, swelling agent and retarder.
  5. 5. the method according to claim 4 that coal mine filling lotion is prepared using biological material, it is characterised in that：It is described Water-reducing agent is melamine high-efficiency water-reducing agent, early strength agent is calcium chloride, swelling agent is calcium oxide-calcium sulphoaluminate, retarder is wood Matter calcium iodate, the quality proportioning of each component are：
    Melamine high-efficiency water-reducing agent：18%-32%
    Calcium chloride：40%-55%
    One calcium sulphoaluminate of calcium oxide：20%-35%
    Wooden calcium iodate：0.7%-3.9%.
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CN110330303B (en) * 2019-07-31 2022-03-29 河北充填采矿技术有限公司 Filling material and using method thereof
CN111207970B (en) * 2019-10-21 2022-11-08 江西理工大学 Method for improving tensile strength of full-tailing cemented filling body by using rice straws

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CN1424275A (en) * 2003-01-10 2003-06-18 中国矿业大学（北京校区） Cementing materials for filling, slurry and preparing and filling processes
CN102206096A (en) * 2011-04-13 2011-10-05 河北建筑工程学院 Multi-phase combined lightweight aggregate concrete and preparation method thereof
CN102234191A (en) * 2010-04-20 2011-11-09 山东科技大学 Early strength mine filling cementitious material
CN103449837A (en) * 2013-08-10 2013-12-18 安徽理工大学 Mining foam paste filling material prepared by utilizing synergistic foaming method and preparation method thereof
CN103979884A (en) * 2014-04-30 2014-08-13 太原理工大学 Method for preparing coal mine filling paste by utilizing waste concrete

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Publication number Priority date Publication date Assignee Title
CN1424275A (en) * 2003-01-10 2003-06-18 中国矿业大学（北京校区） Cementing materials for filling, slurry and preparing and filling processes
CN102234191A (en) * 2010-04-20 2011-11-09 山东科技大学 Early strength mine filling cementitious material
CN102206096A (en) * 2011-04-13 2011-10-05 河北建筑工程学院 Multi-phase combined lightweight aggregate concrete and preparation method thereof
CN103449837A (en) * 2013-08-10 2013-12-18 安徽理工大学 Mining foam paste filling material prepared by utilizing synergistic foaming method and preparation method thereof
CN103979884A (en) * 2014-04-30 2014-08-13 太原理工大学 Method for preparing coal mine filling paste by utilizing waste concrete

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