CN111138097B - Filling material for filling mining - Google Patents

Filling material for filling mining Download PDF

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Publication number
CN111138097B
CN111138097B CN202010035183.6A CN202010035183A CN111138097B CN 111138097 B CN111138097 B CN 111138097B CN 202010035183 A CN202010035183 A CN 202010035183A CN 111138097 B CN111138097 B CN 111138097B
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parts
filling
filling material
paste
calcium
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CN111138097A (en
Inventor
赵庆民
施现院
柳成懋
刘春明
郭守刚
沈海东
李向阳
李明闯
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Shandong Kangge Energy Technology Co ltd
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Shandong Kangge Energy Technology Co ltd
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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
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
    • C04B7/19—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
    • 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
    • C04B28/08—Slag 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/48—Clinker treatment
    • C04B7/52—Grinding ; After-treatment of ground cement
    • 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
    • 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
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention discloses a filling material for filling mining, which is prepared from the following raw materials in parts by weight: 325 parts of cement; 34 parts of slag micro powder; 7 parts of calcium sulphoaluminate; 4 parts of calcium aluminate; 2 parts of calcium oxide; sodium carbonate accounts for 1 part. The filling material can be independently used or prepared into paste with fly ash and gangue, and the paste has the characteristics of good workability, low bleeding rate, suitability for pumping, short hardening time, high compressive strength after solidification and the like. The filling material can consume a large amount of coal gangue in coal mine filling mining operation, thereby achieving the purpose of changing waste into valuable.

Description

Filling material for filling mining
Technical Field
The invention relates to a filling material for filling and mining, which can be applied to underground filling, dam building, road paving and other projects.
Background
The filling is generally made of four filling raw materials of fly ash, cement, gangue and mine water which are mixed into a fluid with slump of 265-285mm according to a certain proportion, so that the fluid has better flowing property and safety performance of avoiding gangue segregation. However, in recent years, environmental protection inspection and control are strict, ammonia water is often added in the coal burning process of a power plant for denitration, so that the ammonia water taste of the fly ash is heavier, ammonia gas is released when the fly ash participates in paste proportioning, the paste curing temperature is lower due to endothermic reaction of the released ammonia gas, the paste solidification reaction is slower, the demolding and frame pulling time is delayed, the paste solidification frame pulling time generally exceeds 10 hours, and the filling efficiency is greatly reduced.
Disclosure of Invention
The invention provides a filling material for filling mining, which is added with a plurality of inorganic salts to neutralize ammonia water in fly ash, replaces cement in the traditional filling raw material, and has the characteristics of quick solidification and high strength.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a filling material, the filling material consisting of: 325 parts of cement, slag micropowder, calcium sulphoaluminate, calcium aluminate, calcium oxide and sodium carbonate, wherein the components in parts by weight are as follows: 325-55 parts of cement; 30-35% of slag micro powder; 5-10 parts of calcium sulphoaluminate; 3-5 parts of calcium aluminate; 1-3 parts of calcium oxide; 0.5-2 parts of sodium carbonate. The filling material is a powdery material with certain chemical activity and has the characteristics of fine granularity and good workability.
The further preferred scheme is as follows: 325 parts of cement; slag micropowder 34; calcium sulfoaluminate 7; calcium aluminate 4; 2 parts of calcium oxide; sodium carbonate 1.
The further preferred scheme is as follows: the filling material is powder, wherein the content of particles smaller than 0.045mm is not less than 67.03%. I.e. the screen allowance is 32.97%.
The further preferred scheme is as follows: the bulk density of the powder of the filler material was 0.81 KG/L.
A filling paste consists of the following components: the filling material, the fly ash, the gangue and the water comprise the following components in parts by weight: 155' 165 filler, 115-125 fly ash, 1100-1200 gangue and 400-500 water.
Further preferred embodiments: the components comprise, by weight, a filling material 160, fly ash 120, gangue 1160 and water 430.
The forming mechanism of the paste:
the filling material contains more active materials, has obvious effect with the fly ash and the gangue powder under the action of aqueous solution, mutually excites active substances to generate chemical reaction, and mutually adsorbs anions and cations to precipitate and form compact solid.
2R-+Ca2+＝CaR2
Al3++3OH-＝Al(OH)3
2H2O+SO4 2-+Ca2+＝CaSO4.2H2O
The invention has the beneficial effects that:
(1) the filling material is formed by adding a certain amount of inorganic salts such as calcium sulphoaluminate, calcium aluminate, calcium oxide, sodium carbonate and the like into fly ash and slag micropowder serving as base materials, has a certain chemical activity, and has the characteristics of fine granularity and good workability.
(2) The content of particles smaller than 0.045mm in the filling material is 67.03 percent, namely the screen allowance is 32.97 percent, the particle size of the powder meets the requirement of being viscous pasty slurry after being stirred with water, viscous waste rock particles can be well wrapped, the separation and sinking of the waste rock particles are prevented, and therefore the particle size condition required by filling can be met.
(3) The filling material has good activity, so that the demolding time of the paste prepared from the filling material, the cementing material, the gangue material and the mine water is 6 hours, the demolding time is short and is far shorter than that of common filling powder, the underground production requirement can be well met, and the filling efficiency is greatly improved.
(4) The filling material has a certain cementing effect and can be independently used in projects with low compression requirements. The preparation process has no special process and needs no heating and pressurizing.
Detailed Description
Example 1
The filling material is prepared from the following raw materials in parts by weight: 325 parts of cement; 34 parts of slag micro powder; 7 parts of calcium sulphoaluminate; 4 parts of calcium aluminate; 2 parts of calcium oxide; sodium carbonate accounts for 1 part. The filling material is treated by the processes of drying, grinding and the like to obtain high-fineness and high-activity powder. The content of particles smaller than 0.045mm in the powder is not lower than 67.03%, the particle size of the powder meets the requirement of being viscous pasty slurry after being stirred with water, viscous gangue particles can be well wrapped, and the gangue particles are prevented from being segregated and sinking. The bulk density of the powder of the filling material is 0.81KG/L, and belongs to medium-density powder. The filling material has a certain cementing effect and can be independently used in projects with low compression requirements. The compressive strength is not lower than 3MPa, no special process is needed in preparation, and heating and pressurizing are not needed.
Example 2
The filling material contains active ingredients, has obvious effect with the fly ash and the gangue powder under the action of aqueous solution, mutually excites active substances to generate chemical reaction, and mutually adsorbs anions and cations to precipitate and form compact solid.
2R-+Ca2+＝CaR2
Al3++3OH-＝Al(OH)3
2H2O+SO4 2-+Ca2+＝CaSO4.2H2O
The filling paste is prepared from the following components in parts by weight: 120 parts of fly ash; 1160 parts of gangue; 430 parts of water; 160 parts of filling materials. The technical indexes of the paste are tested by experiments:
1. determination of pumpable time
By measuring the slump of the paste at each time period, the initial slump is 270mm, the slump when the fluidity is relatively poor is 250mm, and the pumping time of the paste is measured to be 2.5 hours. Compared with the pumping time of 2 hours of paste prepared by the existing fly ash, the pumping time is slightly increased, more time is gained for mechanical failure of equipment during the process of stopping pumping, treating and filling, and the probability of pipe blockage is reduced. Meanwhile, the paste has good fluidity, the paste has a large diffusion area after slump, the diffusion radius is 280mm, the gangue is uniformly distributed, and the segregation phenomenon does not exist.
2. Determination of the demold time
And (3) filling a part of the paste which is just prepared into a plurality of moulds, performing trial mould removal after a period of time, and obtaining the mould removal time when the test block is not deformed after the paste in different time periods is removed. The paste was observed to be demolded for 6 hours. And the stripping time of the laboratory corresponds to the time of pulling the frame after the underground filling working surface is filled. The time for removing the mold is 6 hours, the time is short, the underground production requirement can be well met, and the next cycle of production can be organized by pulling the frame in time.
3. Testing of compressive Strength
Strength tests were performed on the formulation paste using KG03 material for different periods of time and compared to the strength of a 325 cement paste as follows:
Figure BDA0002365752650000041
Figure BDA0002365752650000051
as can be seen from the above table, the KG03 material is used to replace the current 325 cement filling, so that the compressive strength is greatly enhanced, and favorable conditions are created for the timely production of the pull frame in the well.
4. Determination of bleeding Rate
Through a bleeding test, the bleeding rate of the paste prepared by using the KG03 material is 0.74 percent, while the bleeding rate of the paste prepared by using the 325 cement is 1.15 percent, the bleeding rate is reduced, the paste is kept to be good in workability, the bleeding after filling is reduced, the paste top-contacting rate is improved, and the top plate can be better supported.
Compared with the commonly used 325 cement paste for proportioning, the filling material of the invention has more excellent performance and can better meet the filling requirement. Meanwhile, a large amount of waste rock is consumed, and the environmental pollution is reduced.

Claims (1)

1. The filling paste is characterized by comprising the following components: the composite material comprises a filling material, fly ash, gangue and water, wherein the weight parts of the components are as follows: filler material 160, fly ash 120, gangue 1160, water 430; the filling material consists of the following components: 325 parts of cement, slag micropowder, calcium sulphoaluminate, calcium aluminate, calcium oxide and sodium carbonate, wherein the components in parts by weight are as follows: 325 cement 52; slag micropowder 34; calcium sulfoaluminate 7; calcium aluminate 4; calcium oxide accounts for 2; sodium carbonate 1, wherein the filling material is in a powder shape; the content of particles smaller than 0.045mm in the filling material is not lower than 67.03%; the bulk density of the filler was 0.81 kg/L.
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CN111138097B true CN111138097B (en) 2022-04-22

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Publication number Priority date Publication date Assignee Title
CN112062497A (en) * 2020-08-05 2020-12-11 山东康格能源科技有限公司 Paste accelerator

Citations (7)

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CN103253915A (en) * 2013-05-22 2013-08-21 淄博矿业集团有限责任公司许厂煤矿 Preparation method of gangue-based paste filling material
CN103626452A (en) * 2013-11-15 2014-03-12 河北筑盛建材科技开发有限公司 Ultrahigh water filling material
CN104556885A (en) * 2015-02-10 2015-04-29 天津城建大学 Pumpable coal mine goaf backfilling material
CN105314944A (en) * 2015-10-15 2016-02-10 天地科技股份有限公司 Mining composite cementing material and mining filling material
CN106186961A (en) * 2016-07-21 2016-12-07 淄博矿业集团有限责任公司 A kind of colliery rubber solid material and spoil mastic thereof
CN106517940A (en) * 2016-11-04 2017-03-22 大同煤矿集团有限责任公司 Contiguous seam efficient filling material
CN107352907A (en) * 2017-07-28 2017-11-17 固岩科技发展有限公司 A kind of preparation method of colliery filling slurry

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Publication number Priority date Publication date Assignee Title
FR2830269B1 (en) * 2001-09-28 2004-07-09 Eurovia Man PROCESS FOR PREPARING A SELF-COMPACTING FILL, SELF-COMPACTING FILL AND THE USE THEREOF
CN102924010A (en) * 2012-10-19 2013-02-13 太原理工大学 Self-compaction filling paste body and preparation process thereof
CN106699078B (en) * 2016-12-20 2019-04-26 河南工程学院 A kind of coal mine early-strength low cost filler and its preparation method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103253915A (en) * 2013-05-22 2013-08-21 淄博矿业集团有限责任公司许厂煤矿 Preparation method of gangue-based paste filling material
CN103626452A (en) * 2013-11-15 2014-03-12 河北筑盛建材科技开发有限公司 Ultrahigh water filling material
CN104556885A (en) * 2015-02-10 2015-04-29 天津城建大学 Pumpable coal mine goaf backfilling material
CN105314944A (en) * 2015-10-15 2016-02-10 天地科技股份有限公司 Mining composite cementing material and mining filling material
CN106186961A (en) * 2016-07-21 2016-12-07 淄博矿业集团有限责任公司 A kind of colliery rubber solid material and spoil mastic thereof
CN106517940A (en) * 2016-11-04 2017-03-22 大同煤矿集团有限责任公司 Contiguous seam efficient filling material
CN107352907A (en) * 2017-07-28 2017-11-17 固岩科技发展有限公司 A kind of preparation method of colliery filling slurry

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