CN102701672A - Foam filling body for coal mine goaf filling and preparation filling method of foam filling body - Google Patents

Foam filling body for coal mine goaf filling and preparation filling method of foam filling body Download PDF

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Publication number
CN102701672A
CN102701672A CN2012101646996A CN201210164699A CN102701672A CN 102701672 A CN102701672 A CN 102701672A CN 2012101646996 A CN2012101646996 A CN 2012101646996A CN 201210164699 A CN201210164699 A CN 201210164699A CN 102701672 A CN102701672 A CN 102701672A
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CN
China
Prior art keywords
foam
filling
water
flyash
cement
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Pending
Application number
CN2012101646996A
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Chinese (zh)
Inventor
蔡为益
丁陈建
陶祥令
马金荣
李志永
刘辉
刘明
王琳
张洪乐
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Cumt Geotechnical Engineering & New Technology Development Co ltd
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Cumt Geotechnical Engineering & New Technology Development Co ltd
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Priority to CN2012101646996A priority Critical patent/CN102701672A/en
Publication of CN102701672A publication Critical patent/CN102701672A/en
Pending legal-status Critical Current

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Abstract

The invention provides a foam filling body for coal mine goaf filling and a preparation filling method of the foam filling body and belongs to the technical field of coal mine goaf filling and underground construction engineering. The foam filling body comprises the following ingredients in parts by weight: 60 to 70 parts of coal ash, 20 to 40 parts of cement, 20 to 45 parts of water, 0.2 to 0.6 parts of water reducing agents, 0.4 to 1.6 parts of coagulation accelerators and 0 to 20 parts of active agents, and the volume percentage ratio of foam to gelling slurry is 100-250 percent. The gelling slurry solidification time of the filling body is about 3 to 4 days, the single-axis stress intensity is 0.5 to 1.7MPa after 28 days, the apparent density is 650 to 940kg/m<3>, the pumpable time is 11 hours, and the heat conductivity is 0.255 to 0.376 W/(m.k). The foaling filling body can be used for the coal mine goaf filling and has the beneficial effects that the coal ash consumption of the foam filing body is obviously increased, the preparation is simple, the cost is lower, the functions of light weight, cracking resistance, heat insulation, seismic resistance and the like are realized, the on-site application prospects is wide, and obvious economic benefits are realized.

Description

A kind of foam that is used for the colliery bashing is filled out body and preparation placement method
Technical field
The present invention relates to a kind of foam that is used for the colliery bashing and fill out body and placement method, be applicable to that mainly filling and antidetonation layer are used in filling and the underground works of coal mine gob.
Background technology
China is a consumption of coal and big producing country, and secular coal mining forms large-area underground worked-out section.At present radical cure subsidence and adopting damage the most effectively method be exactly the worked-out section backfill.For a long time, the main both at home and abroad technology that adopts comprises dry filling, hydraulic sand filling and three kinds of methods of consolidated fill.Wherein after the method for consolidated fill worked-out section after the material gluing of consolidated fill intensity big; Significantly reduce raw-material use; Also can be used for burying dark, press big, weak-walled in thick above ore body, the use consolidated fill has become the inexorable trend of coal mine gob backfill.The used cement amount of tradition cement bond obturator is big, increases the cost of ton coal unit price.Reducing cement consumption and cost, is to seek the effective way that is applicable to the mine new type filling material.
The foam obturator has the convenience of conveying, good fluidity, low price, utilizes the mine tailing breeze of different gradation and cement to carry out proportioning, can keep certain intensity, can be used as a kind of novel obturator fully and in the coal mine gob backfill, uses.In recent years along with the increase of coal consumption amount; The output of flyash is high; These flyash are deposited in the good farmland, river course that we are becoming tight day throughout the year; Pollution to environment is quite big, adopts high volume fly ash concrete and produces flyash in great mixed amount foamed concrete, has realized " minimizing, innoxious, resource utilization " problem that flyash is used.Form the general layout that is the main body with " environmentally conscious materials ", so flyash in great mixed amount foam obturator is used for coal mine gob filling thereupon, not only has good social benefit, and have good economic benefit.
Summary of the invention
The present invention provides a kind of foam that is used for the colliery bashing to fill out body and preparation placement method thereof, adopts flyash in great mixed amount to produce flyash in great mixed amount foamed concrete, realizes " minimizing, innoxious, resource utilization " problem of flyash.
The present invention realizes with following technical scheme: a kind of foam that is used for the colliery bashing is filled out body, and the foam obturator comprises water, flyash, gelling material, extra material, promoting agent and foam, processes through stirring pulping; The weight part of each raw material is: flyash 60-70 part, cement 20-40 part, water 20-45 part, water reducer 0.2-0.6 part, setting accelerator 0.4-1.6 part, promoting agent 0-20 part, foam: be the per-cent 100-250% of gelling slurry volume;
Said cement is that strength grade is the silicate cement of 32.5 grades or 42.5 grades, and its performance meets the regulation of GB175-1999 " silicate cement, ordinary Portland cement ";
Said flyash is secondary or three grades of flyash, and its performance meets GB/T1596-2005 " flyash that is used for cement and concrete " regulation;
Said water reducer is a polycarboxylic acid high-performance water reducer;
Said setting accelerator is a sulfate-type;
Said whipping agent is a JT composite animal albumen whipping agent;
Said promoting agent is a gypsum;
Said water is normal drinking water or middle water;
The above-mentioned foam that is used for the colliery bashing is filled out body, and the weight part of each raw material of foam obturator is preferably: 65 parts in flyash, 35 parts of cement; 45 parts in water, 0.35 part of water reducer, 0.7 part of setting accelerator; 0 part of promoting agent, foam: the per-cent of gelling slurry volume is 100%.
The above-mentioned foam that is used for the colliery bashing is filled out the preparation placement method of body, comprises that pre-treatment of raw material, each compaction material store, the preparation of glued slurries reaches and mixes four steps of bubble slip casting:
(1) pre-treatment of raw material: flyash and cement are crossed standard sieve, in case caking wherein deposits at foam slurry; The standard sieve mesh is several to be selected according to particle diameter ability in the pumped slurry;
(2) each compaction material stores: take by weighing each raw material in proportion, store for use;
(3) glued slurries preparation: in stirrer, cement, flyash, water reducer and promoting agent are put into, mix adds water simultaneously in proportion to evenly, at the uniform velocity is stirred to evenly foam to be added;
(4) mix bubble slip casting: whipping agent mixes according to proportioning with water produces expanding foam solution, produces expanding foam solution according to the whipping agent of 1 volume and the water proportioning mixing of 50-60 volume; Through foaming machine, sealing foaming machine valve is opened the blebbing valve behind the feed liquor earlier, measures required foam volume with measurer with expanding foam solution; Stirrer is not shut down, and under whipped state, mixes bubble, and 30-50r/min adds 1/4 of total proportioning foam total amount under the low speed, and the gelling slurries are mixed even, and high speed 60-120r/min adding residue foam volume stirs 5-6min then, stirs and finishes to add setting accelerator in the preceding 1min; Behind the mixed bubble end of processing even gelling slurry is injected into coal mine gob through pumping and carries out filling.
Detect data presentation, obturator each item technical indicator of the present invention is following:
This fills out body gelling stereoplasm time 3-4d, and uniaxial compression intensity is 0.5-1.7MPa behind the 28d, apparent density 650-940kg/m 3But, pump time 11h, thermal conductivity 0.255-0.376W/ (mk).
The invention has the beneficial effects as follows: when the foam produced of preparation is filled out body and can significantly be increased the flyash consumption, realize functions such as lightweight, cracking resistance, insulation and antidetonation, product is reliable and stable.Especially in flyash output larger area, can gather materials on the spot, really realize " minimizing, innoxious, resource utilization " problem that flyash is used, rig-site utilization has a extensive future, and distinct economic is arranged.
Description of drawings
Fig. 1 is the schema that the present invention prepares filling.
Embodiment
Below in conjunction with accompanying drawing and one embodiment of the present of invention further detailed description method of the present invention and effect, but the invention is not restricted to this embodiment.
(1) raw material and each ingredients weight parts:65 parts in flyash, 35 parts of cement, 45 parts in water, 0.35 part of water reducer, 0.7 part of setting accelerator, 0 part of promoting agent, foam: the per-cent of gelling slurry volume is 100%.
Cement is that strength grade is the silicate cement of 32.5 grades or 42.5 grades, and its performance meets the regulation of GB175-1999 " silicate cement, ordinary Portland cement ";
Flyash is three grades of flyash, and its performance meets GB/T1596-2005 " flyash that is used for cement and concrete " regulation;
Water reducer is a polycarboxylic acid high-performance water reducer;
Setting accelerator is a sulfate-type;
Whipping agent is a JT composite animal albumen whipping agent;
Promoting agent is a gypsum;
Water is normal drinking water.
(2) preparation placement method:Undertaken by flow process shown in the accompanying drawing.
(1) pre-treatment of raw material: flyash and cement are crossed engineering and are used 4 mesh standard sieves, in case caking wherein deposits at foam slurry.
(2) each compaction material stores: measure the component of following parts by weight, flyash 60-70 part, cement 20-40 part, water 20-45 part, water reducer 0.2-0.6 part, setting accelerator 0.4-1.6 part, promoting agent 0-20 part; Starting material store for use.
(3) glued slurries preparation: in stirrer, cement, flyash, water reducer and promoting agent are put into, mix adds water simultaneously in proportion to evenly, at the uniform velocity is stirred to evenly foam to be added.
(4) mix bubble slip casting: whipping agent mixes according to proportioning with water produces expanding foam solution, produces expanding foam solution according to the whipping agent of 1 volume and the water proportioning mixing of 50-60 volume; Through foaming machine, sealing foaming machine valve is opened the blebbing valve behind the feed liquor earlier, measures required foam volume with measurer with expanding foam solution; Stirrer is not shut down, and under whipped state, mixes bubble, and 30-50r/min adds 1/4 of total proportioning foam total amount under the low speed, and the gelling slurries are mixed even, and high speed 60-120r/min adding residue foam volume stirs 5-6min then, stirs and finishes to add setting accelerator in the preceding 1min; Behind the mixed bubble end of processing even gelling slurry is injected into coal mine gob through pumping and carries out filling.
(5) after the filling of above-mentioned preparation slurries finishes, carry out the cyclical operation of (1), (2), (3), (4) according to field condition.
Detect data presentation, each item technical indicator is following:
This fills out about 3.5d of body gelling stereoplasm time, and uniaxial compression intensity is 0.9MPa behind the 28d, apparent density 790kg/m 3But, pump time 8h, thermal conductivity 0.276W/ (mk).

Claims (2)

1. a foam that is used for the colliery bashing is filled out body, it is characterized in that, the foam obturator comprises water, flyash, gelling material, extra material, promoting agent and foam, processes through stirring pulping; The weight part of each raw material is: flyash 60-70 part, cement 20-40 part, water 20-45 part, water reducer 0.2-0.6 part, setting accelerator 0.4-1.6 part, promoting agent 0-20 part, foam: be the per-cent 100-250% of gelling slurry volume;
Said cement is that strength grade is the silicate cement of 32.5 grades or 42.5 grades, and its performance meets the regulation of GB175-1999 " silicate cement, ordinary Portland cement ";
Said flyash is secondary or three grades of flyash, and its performance meets GB/T1596-2005 " flyash that is used for cement and concrete " regulation;
Said water reducer is a polycarboxylic acid high-performance water reducer;
Said setting accelerator is a sulfate-type;
Said whipping agent is a JT composite animal albumen whipping agent;
Said promoting agent is a gypsum;
Said water is normal drinking water or middle water;
A kind of foam that is used for the colliery bashing according to claim 1 is filled out body, and it is characterized in that: the foam obturator comprises water, flyash, gelling material, extra material, promoting agent and foam, processes through stirring pulping; The weight part of each raw material is: 65 parts in flyash, and 35 parts of cement, 45 parts in water, 0.35 part of water reducer, 0.7 part of setting accelerator, 0 part of promoting agent, foam: the per-cent of gelling slurry volume is 100%.
2. claim 1 or the 2 described foams that are used for the colliery bashing are filled out the preparation placement method of body, it is characterized in that, comprise that pre-treatment of raw material, each compaction material store, glued slurries preparation and mix four steps of bubble slip casting:
(1) pre-treatment of raw material: flyash and cement are crossed standard sieve, in case caking wherein deposits at foam slurry; The standard sieve mesh is several to be selected according to particle diameter ability in the pumped slurry;
(2) each compaction material stores: take by weighing each raw material in proportion, store for use;
(3) glued slurries preparation: in stirrer, cement, flyash, water reducer and promoting agent are put into, mix adds water simultaneously in proportion to evenly, at the uniform velocity is stirred to evenly foam to be added;
(4) mix bubble slip casting: whipping agent mixes according to proportioning with water produces expanding foam solution, produces expanding foam solution according to the whipping agent of 1 volume and the water proportioning mixing of 50-60 volume; Through foaming machine, sealing foaming machine valve is opened the blebbing valve behind the feed liquor earlier, measures required foam volume with measurer with expanding foam solution; Stirrer is not shut down, and under whipped state, mixes bubble, and 30-50r/min adds 1/4 of total proportioning foam total amount under the low speed, and the gelling slurries are mixed even, and high speed 60-120r/min adding residue foam volume stirs 5-6min then, stirs and finishes to add setting accelerator in the preceding 1min; Behind the mixed bubble end of processing even gelling slurry is injected into coal mine gob through pumping and carries out filling.
CN2012101646996A 2012-05-25 2012-05-25 Foam filling body for coal mine goaf filling and preparation filling method of foam filling body Pending CN102701672A (en)

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CN2012101646996A CN102701672A (en) 2012-05-25 2012-05-25 Foam filling body for coal mine goaf filling and preparation filling method of foam filling body

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2015007090A1 (en) * 2013-07-17 2015-01-22 中国矿业大学 Inorganic cured foam material for surface leaking stoppage in shallow coal seam mining areas and preparation method thereof
WO2015007104A1 (en) * 2013-07-17 2015-01-22 中国矿业大学 Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor
CN104743999A (en) * 2015-03-09 2015-07-01 沈阳化工大学 Dual-component mining foam paste filling material and preparation method thereof
CN105585295A (en) * 2015-12-22 2016-05-18 中交第一公路勘察设计研究院有限公司 Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material
CN108863215A (en) * 2018-06-21 2018-11-23 徐州中国矿大岩土工程新技术发展有限公司 Goaf paste body filling slurry and preparation method thereof
CN110256033A (en) * 2019-03-22 2019-09-20 山东科技大学 High porosity foam body and preparation method thereof for goaf coal spontaneous combustion prevention and treatment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101723622A (en) * 2008-10-28 2010-06-09 华鑫博越国际土木建筑工程技术(北京)有限公司 Foam tailings cemented filling material and manufacturing method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101723622A (en) * 2008-10-28 2010-06-09 华鑫博越国际土木建筑工程技术(北京)有限公司 Foam tailings cemented filling material and manufacturing method thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2592912C2 (en) * 2013-07-17 2016-07-27 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Inorganic cured foam material for stopping leaks on surface in area of coal production in shallow formation and preparation method thereof
WO2015007090A1 (en) * 2013-07-17 2015-01-22 中国矿业大学 Inorganic cured foam material for surface leaking stoppage in shallow coal seam mining areas and preparation method thereof
WO2015007104A1 (en) * 2013-07-17 2015-01-22 中国矿业大学 Coal ash solidification foam material used for prevention and treatment of spontaneous combustion of coal and preparation method therefor
RU2588588C2 (en) * 2013-07-17 2016-07-10 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Hardening foam material containing coal ash, for preventing coal self-ignition 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
CN104743999A (en) * 2015-03-09 2015-07-01 沈阳化工大学 Dual-component mining foam paste filling material and preparation method thereof
CN105585295A (en) * 2015-12-22 2016-05-18 中交第一公路勘察设计研究院有限公司 Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material
CN108863215A (en) * 2018-06-21 2018-11-23 徐州中国矿大岩土工程新技术发展有限公司 Goaf paste body filling slurry and preparation method thereof
CN108863215B (en) * 2018-06-21 2020-12-25 徐州中国矿大岩土工程新技术发展有限公司 Goaf paste filling slurry and preparation method thereof
CN110256033A (en) * 2019-03-22 2019-09-20 山东科技大学 High porosity foam body and preparation method thereof for goaf coal spontaneous combustion prevention and treatment
CN110256033B (en) * 2019-03-22 2021-07-30 山东科技大学 High-porosity foam for spontaneous combustion control of coal in goaf and preparation method thereof

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Application publication date: 20121003

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