CN109956712A - Continous way builds recycled aggregate filling coal mine gob system and technique - Google Patents

Continous way builds recycled aggregate filling coal mine gob system and technique Download PDF

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Publication number
CN109956712A
CN109956712A CN201910382245.8A CN201910382245A CN109956712A CN 109956712 A CN109956712 A CN 109956712A CN 201910382245 A CN201910382245 A CN 201910382245A CN 109956712 A CN109956712 A CN 109956712A
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China
Prior art keywords
building
subsystem
filling
filler
recycled aggregate
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Granted
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CN201910382245.8A
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Chinese (zh)
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CN109956712B (en
Inventor
王晓东
李建文
曹祖宝
刘小平
武博强
许刚刚
冯龙飞
朱世彬
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Xian Research Institute Co Ltd of CCTEG
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Xian Research Institute Co Ltd of CCTEG
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Publication of CN109956712A publication Critical patent/CN109956712A/en
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Classifications

    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/08—Filling-up hydraulically or pneumatically
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

A kind of continous way building recycled aggregate filling coal mine gob system and technique, expect that regeneration subsystem, cement and flying ash grout prepares subsystem, high dense fill material prepares subsystem, low concentration filler prepares subsystem, high dense fill material pumping filling subsystem and low concentration filler pump filling subsystem admittedly comprising building, by building, building recycled aggregate is made in material raw material admittedly, prepare Cement fly ash, filler preparation is carried out, the pumping filling in goaf is finally carried out；The present invention, which consolidates civil buildings, as a result, expects that formation granularity and the adjustable physico-mechanical properties of component ratio are stable without chemically active inertia regeneration civil engineering material after being moderately crushed.It, which can be used as engineering and gathers materials, is mixed with multiclass for the filler that goaf filling is administered with other engineering material, makes to build the engineering material that need to buy of recycled aggregate substitution part, realizes the multiple effect that the solid material of building recycles and reduces engineering material cost.

Description

Continous way builds recycled aggregate filling coal mine gob system and technique
Technical field
The present invention relates to the technical fields of goaf harnessing, more particularly to solve the problems, such as that the solid material of building is nowhere stacked, and will build Building solid material turns waste into wealth, and regrown material is used as the filler of goaf filling improvement, and injecting inside goaf prevents goaf A kind of continous way building recycled aggregate filling coal mine gob system and technique that top plate is collapsed or collapsed.
Background technique
China is coal big country, and coal resource distribution is extensive, with the exploitation to coal resources, is formed a large amount of mined out Area.Some above goafs are shanty town, with work of renovating shantytowns, leave the solid material of a large amount of building, such solid material of building is main For fired brick, armored concrete, contain a small amount of clay, accounting respectively may be about 65%, 30%, 5%, and big, disposition is tired with measuring The problems such as difficult.And coal mine gob filling harnessing project is generally required by the local or a large amount of cheap works of other places purchase Journey filler, such as sand, stone, flyash.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time The experience and achievement of related industry, researching and designing go out a kind of continous way building recycled aggregate filling coal mine gob system and work Skill, to overcome drawbacks described above.
Summary of the invention
The purpose of the present invention is to provide a kind of continous way building recycled aggregate filling coal mine gob system and techniques, can It is stable living without chemistry that civil buildings are consolidated into material formation granularity and the adjustable physico-mechanical properties of component ratio after being moderately crushed Property inertia regenerate civil engineering material.It, which can be used as engineering and gathers materials, is mixed with multiclass for goaf with other engineering material The filler administered is filled, makes to build the engineering material that recycled aggregate substitution part need to be bought, realizes that the solid material of building recycles With the multiple effect for reducing engineering material cost.
To solve the above problems, the invention discloses
By above structure it is found that continous way building recycled aggregate filling coal mine gob system of the invention and technique tool There is following effect:
1, it creatively combines cement and flying ash grout to be applied in the filling of coal mine gob in the solid material of building, realizes non- Often good environmental protection and economy function.
2, it is steady that civil buildings can be consolidated to material formation granularity and the adjustable physico-mechanical properties of component ratio after being moderately crushed It is fixed to regenerate civil engineering material without chemically active inertia, can be used as engineering gather materials be mixed with other engineering material it is more Class is used for the filler that goaf filling is administered, and makes to build the engineering material that recycled aggregate substitution part need to be bought, realization is built Build the multiple effect that solid material recycles with reduces engineering material cost.
3, filler is suitble to the demand in goaf, fully meets the requirement of goaf filling.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of continous way building recycled aggregate filling coal mine gob system of the invention.
Fig. 2 shows the top view of Fig. 1.
Appended drawing reference:
1- loading machine；2- oscillating feeder；3- jaw crusher；The first belt conveyor of 4-；5- double click type pulverizer；6- Second belt conveyor；7- vibrating screen；8- third belt conveyor；9- biaxial rneader；10- exports belt conveyor；11, Four belt conveyors；12, electric magnetic iron remover.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Referring to Fig. 1 and 2, it is shown that continous way building recycled aggregate of the invention fills coal mine gob system.
The continous way building recycled aggregate filling coal mine gob system includes at least building and expects regeneration subsystem, water admittedly Mud coal ash pulp prepares subsystem, filler prepares subsystem and filler pumping filling subsystem, the solid material of building Regeneration subsystem will be sent to filler after the solid material of building is handled and regenerated and prepare subsystem, the cement and flying ash grout It prepares after subsystem carries out Cement fly ash preparation and send to filler and prepare subsystem, the filler prepares subsystem System carries out high (low) concentration filler and prepares and send to filler pumping filling subsystem, the filler pumping filling The filling in subsystem progress goaf.
Wherein, it may include that high dense fill material prepares subsystem and low concentration filling that the filler, which prepares subsystem, Material prepares subsystem, the filler pumping filling subsystem may include high dense fill material pumping filling subsystem and Low concentration filler pumping filling subsystem.
Admittedly material regeneration subsystem may include excavator, loading machine 1, oscillating feeder 2, jaw crusher 3, electricity to the building Deironing device 12, double click type pulverizer 5 and vibrating screen 7, the excavator and hand fit and the solid material of building excavate and Pretreatment, wherein designed according to the stowage capacity of filling governing system, build a maximum demand of recycled aggregate per hour are as follows: 930t ÷ 20h=46.5t/h, excavator continuously pre-processes building, and material ability reaches 100t/h or more admittedly, and the loading machine 1 is more Platform and the responsible building that excavator is pre-processed and dug out expect to be delivered to oscillating feeder 2 admittedly, continuous after more loading machines cooperations Charging capacity reaches 100t/h or more, and the jaw crusher 3 is located at the output end of oscillating feeder 2 thus by oscillating feeder 2 material is crushed, and the feed ability of the oscillating feeder 2 reaches 100t/h or more, the charging of the jaw crusher 3 Mouth 500 × 750mm or more of size, maximum feed granularity 500mm or more, discharge gate 80~150mm of adjustable extent, handle energy Power 100t/h or more is equipped with the first belt conveyor 4 between the output end and double click type pulverizer 5 of the jaw crusher 3, and The electric magnetic iron remover 12 is located on the first belt conveyor 4, to operate except iron in material conveying, and the electromagnetism Iron remover 12 adapts to bandwidth 1000mm or more, specified to hang high 300mm or more, and magnetic field strength is 70mT or more, the double click type The feed gap dimension 400x600 or more of crusher 5, processing capacity 80t/h or more, the double click type pulverizer 5 and vibrating screen 7 it Between be equipped with the second belt conveyor 6, the sieve number of plies of the vibrating screen 7 is 3~4 layers, and sifting-bed inclination is 15~20 °, vibration frequency Rate is 740~970r/min, and processing capacity is 100t/h or more, wherein the material (preferable particle size that the vibrating screen 7 sifts out Less than 5mm) by third belt conveyor 8 supply filler prepare subsystem, the vibrating screen 7 fails the material sifted out (preferably greater than or equal to 5mm) is back to the first belt conveyor 4 by the 4th belt conveyor 11 and be crushed and sieve again.
Wherein, the first belt conveyor is 100t/h or more according to the conveying capacity after primary breakup, the after two-stage crushing Two belt conveyor conveying capacitys are 80t/h or more, and the conveying capacity of the 4th belt conveyor of feed back is 30t/h or more.
Wherein, the Cement fly ash prepares subsystem and stirs comprising batch plant, quantitative water supply installation, level-one Pond, second level stirring pool and delivery pump are mixed, the batch plant and quantitative water supply installation jointly supply slurry and water to one Grade stirring pool resupplies to the progress second level stirring of second level stirring pool after carrying out level-one stirring, then is supplied to filling by delivery pump Material prepares subsystem.
It may include biaxial rneader 9, pulp storage tank and stepless speed regulation screw pump that the high dense fill material, which prepares subsystem, The pulp storage tank main function is to store to prepare the slurries that subsystem pumps, and and composite additive by Cement fly ash It is mixed, capacity should reach 10m3More than, the stepless speed regulation screw pump carries out quantitative conveying, pump to cement and flying ash grout Send in pulp storage tank slurries to biaxial rneader 9, pumpability 30m3/ h or more, the stirring of the double-shaft horizontal blender 9 Ability reaches 60m3/ h or more.
It also may include output belt conveyor 10, the material of double-shaft horizontal blender 9 can be exported.
The high dense fill material filling subsystem is connected to high dense fill material and prepares subsystem, and it includes coagulations Soil pump and high concentration pumping line, the concrete pump stowage capacity reach 80m3/h or more, and maximum pump pressure reaches 16MPa or more, The flow velocity of the filler of the high concentration pumping line pumping is excessively high, and the hydraulic slope that slurry flowing needs to overcome is big, increases energy Amount consumption, flow velocity is too small, and stowage capacity is not able to satisfy production and needs or need to increase filling pipeline internal diameter.It is maximum in filling pump When stowage capacity, flow velocity of the filler in high concentration pumping line is 1.5m/s or so.
Filling system ability Qj=50m3/ h, according to the needs of filling system ability and the flowing velocity (1.5m/ of selection S), it is the high-pressure anti-wear seamless steel pipe of 125mm that high concentration pumping line, which selects internal diameter, and flowing velocity at this time is 1.13m/s.
It includes the level-one stirring pool and second level stirring pool set gradually that the low concentration filler, which prepares subsystem, described Level-one stirring tankage should reach 10m3More than, grout outlet is higher than second level stirring pool, and second level stirring tankage reaches 10m3With On.
The low concentration filler pumping filling subsystem includes Pulp pump and low concentration pumping line, the Pulp pump Pump discharge 80m3/ h or more；And low concentration pumping line particle precipitating in slurries in order to prevent, according to design stowage capacity 50m3/ Relationship between slurry flow velocity (m/s) and caliber (m) can be calculated in pipe in h are as follows:
According to formula, critical dropping velocity V can be calculatedL=4.99 × D0.5, VLIt should be less than v, therefore fill caliber D < 105mm, low concentration pumping line select internal diameter φ 80mm wear-resistant steel pipe, manage interior slurry flow rate 2.7m/s at this time.
Coal mine gob system is filled by building recycled aggregate with above-mentioned continous way, it is solid to efficiently solve earth's surface building Expect processing problem, and the goaf that underlie has obtained effective improvement.
The invention further relates to a kind of continous way building recycled aggregates to fill coal mine gob technique, and it includes following steps:
Step 1: expect that building recycled aggregate is made in raw material admittedly by building material regeneration subsystem admittedly and will build, i.e., it will building Admittedly material raw material are gathered materials by the filler that acquisition after being crushed is suitable for preparing different goaf conditions filling improvement, specific Process is as follows:
The raw material expected admittedly of building are carried out artificial+mechanical (i.e. excavator) combined type pretreatment by the first step, will wherein compared with Building is simultaneously tentatively expected that lumpiness is crushed to less than 500mm × 500mm × 500mm size by bigger material removal admittedly；
Second step, by treated, the solid material of building is packed into loading machine, and is quantitatively fed to primary breakup equipment (preferably jaw Formula crusher) carry out primary crushing；
Third step, the building after primary breakup is processed expect to be delivered to (the preferably double click type crushing of two-stage crushing equipment admittedly Machine) it is crushed, irony sundries in material is removed in transmission process (going for irony sundries is preferably carried out by electric magnetic iron remover Except)；
4th step, the building after two-stage crushing is processed expect to be delivered to screening plant (preferably vibrating screen) admittedly；
5th step, will screen out the building recycled aggregate greater than 5mm and be delivered to secondary breaker and carry out second-time breakage；
6th step will screen out the building recycled aggregate for being less than 5mm and be quantitatively transferred to filling material preparation system.
Step 2: subsystem being prepared by cement and flying ash grout and prepares Cement fly ash, can be provided according to proportion is quantitative Cement and flyash and water carry out level-one stirring and second level stirring, then send slurry to filling material preparation system.
Step 3: subsystem being prepared by filler and carries out filler preparation
(1) prepared by high dense fill material, i.e., is stirred cement and flying ash grout with building recycled aggregate and mixes, process It is middle that appropriate additive, the uniform high dense fill material of forming properties is added, the specific steps are as follows:
The first step starts agitation mixer (preferably biaxial rneader 9), and Cement fly ash is placed on storage slurry Pond quantitatively sprays into Cement fly ash and additive before building recycled aggregate falls into agitation mixer thereto；
Second step, building recycled aggregate continuous and quantitative are delivered in the feeding inlet of agitation mixer；
Third step, Cement fly ash, building recycled aggregate and additive stir in the storehouse of agitation mixer It is even, high dense fill material is formed, and push to discharge port.
(2) prepared by low concentration filler, i.e., Cement fly ash is mixed acquisition with building recycled aggregate, additive Low concentration filler, process flow are as follows:
Level-one stirring pool and second level stirring pool is arranged in the first step near construction material regeneration subsystem, and installation is stirred respectively Mix machine；
Second step starts the blender of level-one stirring pool and second level stirring pool, and Cement fly ash injection level-one is stirred Pond is mixed to certain liquid；
Third step, building recycled aggregate is progressively added in level-one stirring pool, is formed low concentration after being sufficiently stirred and is filled Filling chock material, and level-one stirring pool grout outlet is opened, slurries are emitted into second level stirring pool, low concentration is formed after being stirred and fills Filling chock material
Step 4: the pumping filling that filling subsystem carries out goaf is pumped by filler
(1) high dense fill material pumping filling is pressurizeed by concrete pump and passes through high concentration pumping line and mined out Area's vertical drilling hole is delivered to Goaf Area, the specific steps are as follows:
The first step is connected the orifice tube of concrete pump and vertical drilling hole by high concentration pumping line, and pumped in high concentration Exhaust valve is installed on the tube body of pipe；
Second step starts concrete pump, and it is wet first to pump clear water；
Third step, stops pumping clear water, and the high dense fill material that pumping is completed by the stirring that feed inlet enters works as slurry When liquid is discharged by exhaust valve, exhaust valve is closed；
4th step, record grouting amount and observation pump pressure in pumping procedure, in filling latter stage, pump pressure is gradually risen, and works as work Pressure is more than setting pressure and terminates slip casting when skyrocketing, while terminating stirring slurry；
5th step dismantles the attachment device of high concentration pumping line and orifice tube, starting pumping clear water operation, until high concentration Slurries discharge and water outlet in pumping line become clear water and terminate.
(2) low concentration filler pumping filling
Pulp pump is installed in second level stirring pool, Pulp pump is drilled by low concentration filler filling piping and goaf Orifice tube connection, opens Pulp pump, is adopted the pumping injection of low concentration filler by the filling piping of low concentration filler Dead zone.
Specifically, the project place is former by taking certain mine sinking land in coalmining areas comprehensive treatment and land development and utilization project as an example For shanty town, above ground structure is mostly 1~2 layer of brick mix structure or brick structure, and it is solid that building generates a large amount of buildings after dismounting Material, and since solid doses is big and disposition difficulty is piled up in ground.Through field investigation and calculating, the civil buildings on place are expected into admittedly Piece distribution, predominantly fired brick, armored concrete, contain a small amount of clay, and accounting respectively may be about 65%, 30%, 5%, have collection The middle good condition utilized.
The civil buildings of project place stockpiling expect that regeneration civil engineering material can be formed after moderately broken admittedly, granularity with Component ratio is adjustable, and it is without chemically active stable inert material which, which stablizes,.It can be used as work Journey, which is gathered materials, is mixed with multiclass for the filler that goaf filling is administered with other engineering material, realizes building recycled aggregate The engineering material that substitution part need to be bought realizes the multiple effect that the solid material of building recycles and reduces engineering material cost.Building Recycled aggregate is mixed with other engineering material can prepare multiclass for the filler that goaf filling is administered, filler characteristic It can be adjusted according to use condition.
When goaf is not yet caving completely or is suitable for using high concentration in operating condition of the high direction pore size greater than 50cm of hanging down Slurries filler filling, when between the abundant inbreak in goaf and inbreak balkstone high direction of hanging down aperture 5~50cm it Between when be suitable for using low concentration slurries filler fill, when between the abundant inbreak in goaf and inbreak balkstone in high direction of hanging down Aperture be less than crack in 5cm and Rock Bed_Seperated Zone other slurries preferably selected to fill.
Filling raw material are mainly made of water, cement, flyash, building recycled aggregate and additive, wherein cement, fine coal Ash is cementitious material, and building recycled aggregate is aggregate.
(1) water: grouting water Ying Fuhe " concrete water standard " (JGJ63-2006) requirement.
(2) cement: use strength grade for 32.5 cement, quality should meet " common portland cement " (GB175- 2007/XG1-2009) standard.When cement dampness or resting period are more than 3 months, should resample inspection.
(3) flyash: design should be met using three-level ash, quality " for the flyash in cement and concrete " (GB1596-2017) and " flyash concrete application technology specification " (GBT 50146-2014) standard requirements, and slurry should be met The requirement of liquid Site, specific gravity, fluidity, calculus rate and consolidating strength.
(4) it builds recycled aggregate: being prepared using the solid material of building in area is administered, mainly include broken brick, waste and old coagulation Soil and dregs, should not comprising house refuse and decoration garbage etc., to large-sized bamboo and wood material, plastic products, high intensity stone material, Ironware etc. should be rejected manually in advance.Reworked material maximum particle diameter should be less than 5mm, ultra-fine grain (cement, flyash and regenerated material The material part partial size < 0.075mm) it is no less than 20%.
(5) additive: with slow setting, water conservation, the compound additive for exciting filler performance, Ying Fuhe is " outside concrete Add agent application technology specification " (GB 50119-2013) requirement.
This programme middle and high concentration filler is by building recycled aggregate, flyash, cement, additive and water according to certain Proportion mixes together.Performance after conveying and filling in order to guarantee filler, the high dense fill material of preparation must expire It is enough lower actual conditions:
1) slump.In order to be conducive to Pipeline transport and its certain fluidity in goaf, high concentration material must reach Certain slump, to meet the requirement of filling system pipeline pumping and goaf filling, this programme middle and high concentration filler The slump is designed as between 240 ± 20mm, carries out appropriate adjustment according to erecting dense individual props and filling range.
2) water-retaining property.Lubricant layer in pumping procedure mainly by water, cement and flyash composition is in filler and pipe Lubricating action is played between (hole) wall.When pumping pressure be more than tube wall frictional resistance when, filler just along delivery pipe (channel) to Preceding movement.If filler good fluidity, water-retaining property is bad, will appear bleeding lamination in delivery pipe, so as to cause drop Low flow range or the problems such as cause plugging, plug-hole.Water-retaining property is the important indicator of filler transportation performance, is set in this programme Counting high dense fill material bleeding rate need to be less than 5%.
3) calculus rate.To improve once grouting to the pack completeness in cavity or crack, and reduction supplement Grouting engineering amount, originally The calculus rate that high dense fill material is designed in scheme is greater than 95%.
4) compression strength.According to related specification requirement, this programme design filler 28d uniaxial compressive strength is greater than 2MPa。
Comprehensively consider above-mentioned design objective and the factors such as technique complexity and economy, high concentration is cementing fills for design The match ratio of filling chock material.Water-cement ratio 1:0.7~0.8, cement: flyash=1:2~2.2, glue bone ratio (cement, flyash: building Recycled aggregate) 1:2.3~2.5, compound additive usage amount is cementitious material 2.5%.According to the proportion, every side's high concentration is cementing 505~530kg of water in material, 121~127kg of cement, 242~255kg of flyash, building expect 885~927kg (wherein: soil 44 admittedly ~46kg, 266~278kg of concrete, 575~603kg of brick), 9~9.5kg of compound additive.When construction, high dense fill material The mixing ratio of material can be actually adjusted according to scene.
Low concentration filler is consistent with high dense fill raw materials in the design, mainly expects ratio admittedly by reducing Example, is configured to the better slurries of mobility.Performance after conveying and filling in order to guarantee filler, the filler of preparation must Condition in detail below must be met:
1) volumetric concentration
Volumetric concentration is the percentage that material total volume accounts for slurry total volume admittedly, according to common apparatus performance test and this project Actual demand, slurry volume concentration should be not more than 40%.
2) calculus rate.
The volume of calculus of the calculus rate to condense formation after slurries bleed accounts for the percentage of the volume of virgin pulp liquid, should be greater than 80%.
3) compression strength.
Laboratory conserves 28d, test block pressure resistance intensity 2Mpa or more.
4) match ratio
Water-cement ratio=1:0.75~0.8, cement: flyash=1:1.8~1.9, glue bone ratio=1:1.0~1.2.Every side is low Concentration regeneration filling slurry material dosage 581~592kg of water, 151~166kg of cement, 284~308kg of flyash, build solid material 474~523kg of broken material (wherein: soil 24~26kg, concrete 142k~157g, 308~340kg of brick).When construction, low concentration The mixing ratio of filler can be actually adjusted according to scene.
Wherein, building expect admittedly regeneration subsystem, filler prepare subsystem, be pumped by subsystem be designed as it is fixed (since each subsystem can work independently, and the process combination of mostly equipment monomer, whole system or subsystem can also be moved Turn field).
Goaf filling governing system includes the solid material of building (comprising soil, brick and concrete), flyash, water using material The various materials such as mud, water, additive.The solid material of building is crushed first in workflow and forms regrown material, by flyash, water The materials such as mud, water, additive are mixed Cement fly ash is made in proportion, are stirred in proportion with building recycled aggregate It mixes to form filler.When goaf hollow volume is larger, high dense fill material is selected to be filled；Goaf hollow volume When smaller, low concentration slurry is selected to be filled.
According to goaf investigation result and Treatment design requirement, the goaf filling governing system based on building recycled aggregate Ability is designed as 50m3/ h, the specific dosage of a variety of materials is shown in Table 1 in the present embodiment.
1 highly concentrated cemented fill parameter summary sheet of table
It can be seen that the present invention has the advantages that
1, it creatively combines cement and flying ash grout to be applied in the filling of coal mine gob in the solid material of building, realizes non- Often good environmental protection and economy function.
2, it is steady that civil buildings can be consolidated to material formation granularity and the adjustable physico-mechanical properties of component ratio after being moderately crushed It is fixed to regenerate civil engineering material without chemically active inertia, can be used as engineering gather materials be mixed with other engineering material it is more Class is used for the filler that goaf filling is administered, and makes to build the engineering material that recycled aggregate substitution part need to be bought, realization is built Build the multiple effect that solid material recycles with reduces engineering material cost.
3, filler is suitble to the demand in goaf, fully meets the requirement of goaf filling.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.

Claims (10)

1. a kind of continous way building recycled aggregate fills coal mine gob system, includes at least building and expect regeneration subsystem, water admittedly Mud coal ash pulp prepares subsystem, high dense fill material prepares subsystem, low concentration filler prepares subsystem, high concentration Filler pumping filling subsystem and low concentration filler pumping filling subsystem, it is characterised in that:
It is described building admittedly material regeneration subsystem include excavator, loading machine, oscillating feeder, jaw crusher, electric magnetic iron remover, Double click type pulverizer and vibrating screen, the loading machine are more and are responsible for expecting to convey admittedly by the building that excavator is pre-processed and dug out To oscillating feeder, the jaw crusher is located at the output end of oscillating feeder to carry out brokenly the material of oscillating feeder It is broken, the first belt conveyor is equipped between the output end and double click type pulverizer of the jaw crusher, and the electromagnetism removes iron Device is located on the first belt conveyor, and the second belt conveyor, the vibration are equipped between the double click type pulverizer and vibrating screen The dynamic material sifted out supplies filler by third belt conveyor and prepares subsystem, and the vibrating screen fails the object sifted out Material is back to the first belt conveyor by the 4th belt conveyor and be crushed and sieve again.
2. continous way building recycled aggregate as described in claim 1 fills coal mine gob system, it is characterised in that: the water It includes batch plant, quantitative water supply installation, level-one stirring pool, second level stirring pool and defeated that mud pulverized fuel ash slurry, which prepares subsystem, Pump is sent, slurry and water are supplied to level-one stirring pool jointly, carry out level-one and stir by the batch plant and quantitative water supply installation It is resupplied after mixing to second level stirring pool and carries out second level stirring, then filler is supplied to by delivery pump and prepares subsystem.
3. continous way building recycled aggregate as described in claim 1 fills coal mine gob system, it is characterised in that: the height It includes biaxial rneader, pulp storage tank and stepless speed regulation screw pump that concentration filler, which prepares subsystem, and the pulp storage tank capacity reaches To 10m3More than, the stepless speed regulation screw pump carries out quantitative conveying to cement and flying ash grout, pumps in pulp storage tank slurries to double Axis blender.
4. continous way building recycled aggregate as described in claim 1 fills coal mine gob system, it is characterised in that: the height Concentration filler filling subsystem is connected to high dense fill material and prepares subsystem, and it includes concrete pumps and high concentration to pump Send pipe.
5. continous way building recycled aggregate as described in claim 1 fills coal mine gob system, it is characterised in that: described low It includes the level-one stirring pool and second level stirring pool set gradually that concentration filler, which prepares subsystem, and the level-one stirs tankage Reach 10m3More than, grout outlet is higher than second level stirring pool, and second level stirring tankage reaches 10m3More than.
6. a kind of continous way building recycled aggregate fills coal mine gob technique, characterized by comprising the steps of:
Step 1: expecting that building reworked material is made in raw material admittedly by building material regeneration subsystem admittedly and will build, i.e., it is former will to build solid material Material is gathered materials by the filler that acquisition after being crushed is suitable for preparing different goaf conditions filling improvement；
Step 2: subsystem being prepared by cement and flying ash grout and prepares Cement fly ash, can quantitatively provide cement according to proportion With flyash and water, level-one stirring and second level stirring are carried out, then send slurry to filling material preparation system；
Step 3: subsystem being prepared by high dense fill material and low concentration filler prepares subsystem and carries out filler Preparation；
Step 4: the pumping filling that filling subsystem carries out goaf is pumped by filler.
7. continous way building recycled aggregate as claimed in claim 6 fills coal mine gob technique, it is characterised in that: step 1 Detailed process it is as follows:
The raw material that building is expected admittedly are combined formula pretreatment by the first step, will wherein be removed compared with bigger material and will be built solid material Lumpiness is crushed to less than 500mm × 500mm × 500mm size；
Second step, by treated, the solid material of building is packed into loading machine, and is quantitatively fed to the progress primary crushing of primary breakup equipment；
Third step, the building after primary breakup is processed expects that being delivered to two-stage crushing equipment is crushed admittedly, in transmission process Except irony sundries in material；
4th step, the building after two-stage crushing is processed expect to be delivered to screening plant admittedly；
5th step, will screen out the building recycled aggregate greater than 5mm and be delivered to secondary breaker and carry out second-time breakage；
6th step will screen out the building recycled aggregate for being less than 5mm and be quantitatively transferred to filling material preparation system.
8. continous way building recycled aggregate as claimed in claim 6 fills coal mine gob system, it is characterised in that: the step Specific step is as follows for rapid 3 middle and high concentration filler preparation:
The first step starts agitation mixer, and Cement fly ash is placed on storage paddle pond, falls into and stirs in building recycled aggregate Cement fly ash and additive are quantitatively sprayed into thereto before mixing mixing apparatus；
Second step, building recycled aggregate continuous and quantitative are delivered in the feeding inlet of agitation mixer；
Third step, Cement fly ash, building recycled aggregate and additive stir evenly in the storehouse of agitation mixer, shape At high dense fill material, and push to discharge port.
9. continous way building recycled aggregate as claimed in claim 6 fills coal mine gob system, it is characterised in that: the step The process flow that in rapid 3 prepared by low concentration filler is as follows:
Level-one stirring pool and second level stirring pool are arranged near construction material regeneration subsystem, installs blender respectively for the first step；
Second step starts the blender of level-one stirring pool and second level stirring pool, and Cement fly ash is injected level-one stirring pool To certain liquid；
Building recycled aggregate is progressively added in level-one stirring pool, forms low concentration filling material after being sufficiently stirred by third step Material, and level-one stirring pool grout outlet is opened, slurries are emitted into second level stirring pool, form low concentration filling material after being stirred Material.
10. continous way building recycled aggregate as claimed in claim 6 fills coal mine gob system, it is characterised in that: described Specific step is as follows for step 4 middle and high concentration filler pumping filling:
The first step connects the orifice tube of concrete pump and vertical drilling hole by high concentration pumping line, and in high concentration pumping line Exhaust valve is installed on tube body；
Second step starts concrete pump, and it is wet first to pump clear water；
Third step, stop pumping clear water, pumping by feed inlet enters stirring completion high dense fill material, when slurries by When exhaust valve is discharged, exhaust valve is closed；
4th step, record grouting amount and observation pump pressure in pumping procedure, in filling latter stage, pump pressure is gradually risen, and works as operating pressure Terminate slip casting more than setting pressure and when skyrocketing, while terminating stirring slurry；
5th step dismantles the attachment device of high concentration pumping line and orifice tube, starting pumping clear water operation, until high concentration pumps Slurries discharge and water outlet in pipe become clear water and terminate；
And low concentration filler pumping filling is installs Pulp pump in second level stirring pool, Pulp pump passes through low concentration filling material Material filling piping is connect with goaf drill hole pipe, opens Pulp pump, will be low by the filling piping of low concentration filler Concentration filler pumping injection goaf.
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CN110561617A (en) * 2019-10-12 2019-12-13 长沙矿山研究院有限责任公司 Full-tailing slurry filling system with low density and high strength
CN110590222A (en) * 2019-10-12 2019-12-20 长沙矿山研究院有限责任公司 Filling method of low-density high-strength full-tailing slurry
CN110671147A (en) * 2019-10-31 2020-01-10 河南理工大学 Construction system and construction process for filling goafs of different scales by using waste concrete
CN110671147B (en) * 2019-10-31 2024-02-27 河南理工大学 Construction system and construction process for filling goafs of different scales by utilizing waste concrete
CN112248226A (en) * 2020-09-23 2021-01-22 中煤科工集团西安研究院有限公司 Paste filling material spiral continuous stirring device and paste material preparation method
CN113509995A (en) * 2021-07-28 2021-10-19 烟台杰瑞石油装备技术有限公司 Goaf filling equipment and goaf filling method
CN113509995B (en) * 2021-07-28 2023-11-17 烟台杰瑞石油装备技术有限公司 Goaf filling equipment and goaf filling method
CN114351743A (en) * 2021-12-02 2022-04-15 内蒙古平庄煤业(集团)有限责任公司 Method and device for preparing in-situ sand pebble impermeable material and constructing water-intercepting curtain

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