CN104556917A - High-early-strength filling material for coal mine goaf - Google Patents
High-early-strength filling material for coal mine goaf Download PDFInfo
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- CN104556917A CN104556917A CN201410810478.0A CN201410810478A CN104556917A CN 104556917 A CN104556917 A CN 104556917A CN 201410810478 A CN201410810478 A CN 201410810478A CN 104556917 A CN104556917 A CN 104556917A
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- 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
The invention relates to a high-early-strength filling material for a coal mine goaf. The high-early-strength filling material is prepared from the following components in parts by weight: 10-20 parts of quick-hardening sulphate aluminate cement, 40-80 parts of coal ash, 150-200 parts of coal gangue particles, 1-3 parts of a content-available superplasticizer and 0.1-1 part of a thickener. The high-early-strength filling material is used for filling the coal mine goaf and is remotely pumped, and is high in strength increase speed and filling efficiency, low in filling cost, safe and environmentally friendly. An experiment shows that the early strength of the high-early-strength filling material is high and can reach 10.0MPa, and the compressive strength can reach 18.0MPa in the 28th day.
Description
Technical field
The present invention relates to a kind of coal mine gob filling material, be specifically related to a kind of early-strength type coal mine gob filling material.
Background technology
Coal resources are the first energy of China always, in AND ENERGY RESOURCES CONSUMPTION IN CHINA, account for about 70%, and within coming few decades, the energy structure general layout of China based on coal does not have larger change.At present.After coal adopts traditional coal winning technology to be exploited out; do not carry out the backfill in worked-out section; the rock stratum that such extraction is spatially covered loses and supports and move gradually in worked-out section, bend and destroy; thus cause land subsidence disaster, the destruction that subsidence brings has related to each side such as industry, agricultural, communications and transportation, environment protection, the eubiosis.
In recent years, along with people progressively deepen the understanding of environmental problem, the improvement of colliery mined-out region is also progressively strengthened.At present, domestic traditional governance model is mainly after coal mining subsidence area surely sinks and administers, i.e. coal mining subsidence area-recover damage-subsided land leaves unused-administers, and so not only brings huge difficulty to harnessing project, and control expense is also higher, cause heavy economical load.For the problems referred to above, the main solution of present coal industry in the process of mining, namely carries out backfill to worked-out section process, namely the mode of exploitation limit, limit backfill is adopted, and the backfilling material many employings exciting agent adopted, excite powder, the material of coal ash activity, this technological line also exists the problems such as compaction material strength development is slow, exciting agent unstable properties, final strength are low, the easy efflorescence of consolidation thing in actual application, and placement efficiency is low.Therefore, a kind of desirable goaf filling material is found and corresponding filling mining method is one of direction of following goaf filling production technique development.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can long distance pumping, gain in strength speed is fast, placement efficiency is high, filling expense is low, the early-strength type coal mine gob filling material of safety and environmental protection.
The technical scheme that the present invention solves the employing of its technical problem is: a kind of early-strength type coal mine gob filling material, be made up of the component with mass fraction: quick hardening sulphoaluminate cement 10 ~ 20 parts, 40 ~ 80 parts, flyash, coal gangue particle 150 ~ 200 parts, superplasticizer effective content 1 ~ 3 part, thickening material 0.1 ~ 1 part.
Further, described quick hardening sulphoaluminate cement is selected from 42.5 ~ 72.5 grades of highlight lines quick hardening sulphoaluminate cements.
Further, described flyash is thermal power generation plant by-products II level flyash.
Further, described coal gangue particle is the particle diameter obtained by coal mining by-product coal gangue crushing and screening is 3 ~ 8mm coal gangue particle.
Further, described superplasticizer is polycarboxylic superplasticizer.
Further, described thickening material is methyl cellulose ether, is mainly used in the stability improving slurry, prevents at generation sedimentation or excreting water phenomenon.
Preferably, a kind of constructional method of early-strength type coal mine gob filling material, be arranged in the stirring station near well head and 20 ~ 40 parts of mix and blends that add water by quick hardening sulphoaluminate cement, flyash, coal gangue particle, fluidizer, thickening material, obtained mixture carries out filling through Cemented filling to worked-out section by pumping equipment.
In order to accelerate mixing efficiency, preferably, in stirring station blending bunker, 5 minutes are mixed.
When necessary, mould also can be set to control filling scope.
The present invention adopts quick hardening sulphoaluminate cement and flyash as gelling material, and coal gangue particle as aggregate, and is aided with fluidizer and thickening material, and adding water to stir according to certain ratio forms mixture.Wherein, the gelling material of quick hardening sulphoaluminate cement and flyash compound has early powerful feature, and mixture intensity within 8 hours can be made to reach more than 50% of final strength; Coal gangue particle coal mining by-product coal gangue obtains through crushing and screening, thus can realize the recycling of solid waste; Fluidizer add the mobility that can improve mixture, thickening material add the viscosity that can increase mixture, improve the homogeneity of mixture, formed there is good fluidity, even non-settling mixture.
Main raw material of the present invention is flyash, coal gangue, and these two kinds of raw materials are closely-related industrial by-products with colliery.Therefore, the present invention also can reduce the cost of filling while consuming waste, produces huge environmental protection effect and economic benefit.Adopt early-strength type coal mine gob filling material and the constructional method of the present invention, mixture after filling can solidify generation intensity in 8 hours completely, and collapsible die assembly, realize filling and exploitation operation simultaneously, and work continuously, be independent of each other, with exciting agent, excite compared with powder, coal ash base compaction material, placement efficiency significantly promotes.
The early-strength type coal mine gob filling material of the present invention is used for the filling of coal mine gob, have can long distance pumping, gain in strength speed is fast, placement efficiency is high, filling expense is low, the feature of safety and environmental protection.Experiment proves, the early-strength type coal mine gob filling material early strength height of the present invention can reach 10.0MPa, and within 28 days, ultimate compression strength can reach 18.0MPa.
Embodiment
Be described in further detail the present invention below in conjunction with specific embodiment, following examples are not particularly limited to the present invention's formation.
Embodiment 1
Colliery early-strength type coal mine gob filling material, it consists of: 42.5 grades of highlight lines quick hardening sulphoaluminate cements 10 parts, 40 parts, thermal power generation plant by-products II level flyash, 3 ~ 8mm coal gangue particle 200 parts, polycarboxylic superplasticizer effective content 1 part, methyl cellulose ether 0.1 part, during use, amount of water is 20 parts, obtained uniform mixture.For goaf filling, its performance characteristics is as shown in table 1 after tested.
Embodiment 2
Colliery early-strength type coal mine gob filling material, it consists of: 52.5 grades of highlight lines quick hardening sulphoaluminate cements 15 parts, 60 parts, thermal power generation plant by-products II level flyash, coal gangue particle 175 parts, polycarboxylic superplasticizer effective content 2 parts, methyl cellulose ether 0.5 part, during use, amount of water is 30 parts, obtained uniform mixture.For goaf filling, its performance characteristics is as shown in table 1 after tested.
Embodiment 3
Colliery early-strength type coal mine gob filling material, it consists of: 62.5 grades of highlight lines quick hardening sulphoaluminate cements 20 parts, 80 parts, thermal power generation plant by-products II level flyash, coal gangue particle 150 parts, polycarboxylic superplasticizer effective content 3 parts, methyl cellulose ether 1 part, during use, amount of water is 40 parts, obtained uniform mixture.For goaf filling, its results of property is as shown in table 1 after tested.
Embodiment 4
Colliery early-strength type coal mine gob filling material, it consists of: 72.5 grades of highlight lines quick hardening sulphoaluminate cements 18 parts, 70 parts, thermal power generation plant by-products II level flyash, coal gangue particle 180 parts, polycarboxylic superplasticizer effective content 2.5 parts, methyl cellulose ether 0.8 part, during use, amount of water is 35 parts, obtained uniform mixture.For goaf filling, its results of property is as shown in table 1 after tested.
Table 1-embodiment 1-4 the performance test results
| Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Can flowing time | 105 minutes | 90 minutes | 60 minutes | 40 minutes |
| The collapsible die time | 8 hours | 6 hours | 5 hours | 4.5 hour |
| 8 hours intensity | 3.0MPa | 5.0MPa | 8.0MPa | 10.0MPa |
| 28 days ultimate compression strength | 5.0MPa | 10.0MPa | 15.0MPa | 18.0MPa |
Further describe in detail with in concrete enforcement of the present invention; disclose the preferred type of various compositions used; so that better, clearer description the present invention; but this detailed description does not form special restriction of the present invention; do not rely on these detailed information and adopt other general chemical materials of the technology of the present invention field; as long as it meets the above-mentioned restriction done each moiety title of the present invention, still belong to protection scope of the present invention.
Claims (6)
1. an early-strength type coal mine gob filling material, is characterized in that, is made up of the component with mass fraction: quick hardening sulphoaluminate cement 10 ~ 20 parts, 40 ~ 80 parts, flyash, coal gangue particle 150 ~ 200 parts, superplasticizer effective content 1 ~ 3 part, thickening material 0.1 ~ 1 part.
2. early-strength type coal mine gob filling material according to claim 1, is characterized in that, described quick hardening sulphoaluminate cement is selected from 42.5 ~ 72.5 grades of highlight lines quick hardening sulphoaluminate cements.
3. early-strength type coal mine gob filling material according to claim 1, is characterized in that, described flyash is thermal power generation plant by-products II level flyash.
4. early-strength type coal mine gob filling material according to claim 1, is characterized in that, described coal gangue particle is the particle diameter obtained by coal mining by-product coal gangue crushing and screening is 3 ~ 8mm coal gangue particle.
5. early-strength type coal mine gob filling material according to claim 1, is characterized in that, described superplasticizer is polycarboxylic superplasticizer.
6. early-strength type coal mine gob filling material according to claim 1, is characterized in that, described thickening material is methyl cellulose ether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410810478.0A CN104556917A (en) | 2014-12-22 | 2014-12-22 | High-early-strength filling material for coal mine goaf |
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| CN201410810478.0A CN104556917A (en) | 2014-12-22 | 2014-12-22 | High-early-strength filling material for coal mine goaf |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110718A (en) * | 2015-07-21 | 2015-12-02 | 山西商溢通建材科技有限公司 | High fly ash and coal gangue dry mixed guniting material for underground anchor net support |
| CN105152601A (en) * | 2015-09-28 | 2015-12-16 | 太原理工大学 | Preparation method of gangue base mine cemented filling 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 |
| 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 |
| CN107417228A (en) * | 2017-04-26 | 2017-12-01 | 四川大学 | A kind of high water conservation flyash high-water material of novel high-strength |
| CN109400080A (en) * | 2018-07-27 | 2019-03-01 | 中国矿业大学 | A kind of inorganic solidified flyash filler and preparation method thereof |
| CN111018443A (en) * | 2019-12-27 | 2020-04-17 | 中国矿业大学(北京) | Cemented filling material for coal mine and preparation method thereof |
| CN111439976A (en) * | 2020-02-21 | 2020-07-24 | 阳泉煤业（集团）有限责任公司 | High-water filling material for gob-side entry retaining for mine and preparation method thereof |
| CN115991591A (en) * | 2022-12-16 | 2023-04-21 | 太原理工大学 | Ecological high-ductility cement-based rapid repair material prepared from gangue solid waste and method |
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| JP2004189519A (en) * | 2002-12-10 | 2004-07-08 | Aise Twenty One:Kk | High early strength cement material for secondary product and cement formed secondary product |
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| CN101845966A (en) * | 2009-12-29 | 2010-09-29 | 中国恩菲工程技术有限公司 | Process for filling coal mine goaf |
| CN102603241A (en) * | 2012-03-26 | 2012-07-25 | 西安科技大学 | Coal mine goaf filling material made of gangue |
| CN103396066A (en) * | 2013-07-19 | 2013-11-20 | 北京东方雨虹防水技术股份有限公司 | Quickly-hardened type filling material as well as preparation method and application thereof |
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Patent Citations (5)
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| JP2004189519A (en) * | 2002-12-10 | 2004-07-08 | Aise Twenty One:Kk | High early strength cement material for secondary product and cement formed secondary product |
| CN101008315A (en) * | 2007-02-07 | 2007-08-01 | 邸建友 | Paste-like backfill technology used in coal cutting area and the paste-like thereof |
| CN101845966A (en) * | 2009-12-29 | 2010-09-29 | 中国恩菲工程技术有限公司 | Process for filling coal mine goaf |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110718A (en) * | 2015-07-21 | 2015-12-02 | 山西商溢通建材科技有限公司 | High fly ash and coal gangue dry mixed guniting material for underground anchor net support |
| CN105152601A (en) * | 2015-09-28 | 2015-12-16 | 太原理工大学 | Preparation method of gangue base mine cemented filling 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 |
| 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 |
| CN107417228A (en) * | 2017-04-26 | 2017-12-01 | 四川大学 | A kind of high water conservation flyash high-water material of novel high-strength |
| CN109400080A (en) * | 2018-07-27 | 2019-03-01 | 中国矿业大学 | A kind of inorganic solidified flyash filler and preparation method thereof |
| CN111018443A (en) * | 2019-12-27 | 2020-04-17 | 中国矿业大学(北京) | Cemented filling material for coal mine and preparation method thereof |
| CN111018443B (en) * | 2019-12-27 | 2021-03-16 | 中国矿业大学(北京) | Cemented filling material for coal mine and preparation method thereof |
| CN111439976A (en) * | 2020-02-21 | 2020-07-24 | 阳泉煤业（集团）有限责任公司 | High-water filling material for gob-side entry retaining for mine and preparation method thereof |
| CN115991591A (en) * | 2022-12-16 | 2023-04-21 | 太原理工大学 | Ecological high-ductility cement-based rapid repair material prepared from gangue solid waste and method |
| CN115991591B (en) * | 2022-12-16 | 2024-02-02 | 太原理工大学 | Ecological high-ductility cement-based rapid repair material prepared from gangue solid waste and method |
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Application publication date: 20150429 |