CN102285772A - Coal-gangue processing method, coal-gangue foamed concrete and laneway backfilling method - Google Patents
Coal-gangue processing method, coal-gangue foamed concrete and laneway backfilling method Download PDFInfo
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- CN102285772A CN102285772A CN2011101062938A CN201110106293A CN102285772A CN 102285772 A CN102285772 A CN 102285772A CN 2011101062938 A CN2011101062938 A CN 2011101062938A CN 201110106293 A CN201110106293 A CN 201110106293A CN 102285772 A CN102285772 A CN 102285772A
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- coal gangue
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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
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Abstract
The invention discloses a coal-gangue processing method, coal-gangue foamed concrete produced by the method and a method for backfilling a mine laneway by utilizing the foamed concrete. The coal-gangue processing method comprises the following steps of: firstly crushing coal gangue into powders or granules; then mixing the coal-gangue powders or granules, cement and water to form a coal-gangue concrete slurry; then mixing the coal-gangue concrete slurry and foam to form a coal-gangue foamed-concrete slurry; and finally conveying the coal-gangue foamed-concrete slurry into the laneway needing to be backfilled to form a coal-gangue foamed-concrete filling body in the laneway after the slurry is coagulated. The laneway is backfilled by utilizing the coal-gangue foamed concrete, so that the accumulation and the discharge of the coal gangue are reduced, the nearby material taking of laneway backfill is realized, the non-blind-area dense filling of the laneway can be realized without mechanical tamping, and the safety of a mining area is improved. The coal-gangue foamed concrete disclosed by the invention can also be used for the filling of roadbeds, pipe bases, bridge foundations, high fills and the like.
Description
Technical field
The present invention relates to a kind of handle and the recycle method of coal gangue and product of this method production and uses thereof, specifically, the present invention relates to a kind of utilize the coal gangue method of producing foamed concrete and foamed concrete and the application of this foamed concrete in the mine laneway backfill of adopting this method to produce.
Background technology
In order to cut coal, must in rock mass or ore bed, dig the not tunnel on straight-through ground, after coal mining finished, these tunnels became the worked-out section; When underground mining, for the lifting of digging up mine, transportation, ventilation, draining, supply of power etc. also need digging laneway; These tunnels have level, vertical with tilt, and different.After the coal mining in a certain zone finished, in order to ensure mine safety, the tunnel (comprising the worked-out section) that must will form again gave backfill.Common way is to transport various packing materials in mine from ground, is used for the tunnel backfill.Owing to be subjected to the restriction of each side factors such as position, tunnel, direction, shape and operating environment, when the backfill tunnel, be difficult to carry out tamping operation, make the tunnel eakiness after the backfill, sedimentation phenomenon can appear, there is potential safety hazard.
Coal gangue be mine and the coal washing process in the solid waste that discharges, be a kind of lower with the carbon content of coal seam association in the coal-forming process, than the hard grey black look rock of coal.Common treatment process is that coal gangue is promoted to ground under mine, pushes away long-pending discharging to specified zone again, and in the course of time, the colliery has formed many big and small waste dumps.Waste dump not only takies a large amount of soils, and wherein contains tens kinds of elements such as sulphur, phosphorus, and atmosphere, water source, soil are polluted.The handling problem of these waste dumps has become one of major issue that troubles coal mining enterprise.
As previously mentioned, on the one hand, need transport packing material from ground in mine and be used for the tunnel backfill, there is potential safety hazard in the tunnel that backfill finishes because of eakiness; On the other hand, the coal gangue in the mine need be transported to ground and pile up discharging, not only land occupation, and contaminate environment.At foregoing problems, the report and the application that utilize coal gangue backfill mine laneway were once arranged, its earth-filling method comprises direct method and comminuting method.Direct method is directly to be filled in coal gangue in the mine laneway; Because it is block that coal gangue is, and when the backfill of tunnel, can't carry out tamping operation, cause filling the tunnel that finishes and have the eakiness phenomenon, and blocky coal gangue is difficult to enter some narrow zone in tunnel, cause filling insufficient, still have great potential safety hazard.Comminuting method, be to be filled in the tunnel after coal gangue is pulverized, owing to can't carry out tamping operation, and the colliery powder that is filled in the tunnel can't be bonded together, and causes filling the tunnel that finishes and has the eakiness phenomenon, and the coal gangue powder obturator in the tunnel is the loose sand shape, be easy to generate sedimentation and leakage, can't realize the completely filled in tunnel, have a strong impact on filling intensity, have great potential safety hazard.
Summary of the invention
Coal gangue is handled problems and mine laneway is filled problem in order to solve, the invention provides a kind of coal gangue treatment process, the coal gangue foamed concrete that utilizes this method to produce to serve many purposes, this coal gangue foamed concrete can be used in the backfill of mine laneway.
Coal gangue treatment process of the present invention comprises the steps:
(1) coal gangue is pulverized, formed coal gangue powder or particle;
(2) in coal gangue powder or particle that step (1) produces, add cement and water, fully stir, form the coal gangue concrete slurry;
(3) foamed system by foaming machine fully foams whipping agent with mechanical system, and with the coal gangue concrete slurry uniform mixing that foam and step (2) produce, forms coal gangue foamed concrete slurry.
Coal gangue treatment process of the present invention, in step (2), the weight percent of each component is: coal gangue powder or particle 20%--50%, cement 20%--50%, water 30%--60%.The preferred weight percent of each component is: coal gangue powder or particle 30%--50%, cement 20%--35%, water 30%--50%.The optimum weight per-cent of each component is: coal gangue powder or particle 40%, cement 25%, water 35%.
Whipping agent in the step (3) is to produce the employed whipping agent of common foamed concrete (being also referred to as foaming agent), such as metallic aluminium powder whipping agent, vegetable-protein whipping agent, animal protein foaming agent, sodium resinate class whipping agent, hydrolysis blood glue whipping agent, mahogany acid aluminium whipping agent etc., also can be mixtures two or more in them.The weight of used whipping agent is the 1%--10% of the coal gangue concrete slurry weight of step (2) generation, and preferred 2%--5% is as 3%.
Coal gangue treatment process of the present invention, the coal gangue foamed concrete slurry that step (3) produces promptly forms the coal gangue foamed concrete by the jet orifice ejection of foamed system after solidifying.
The invention provides a kind of coal gangue foamed concrete, this coal gangue foamed concrete contains coal gangue powder or particle, cement, water, and portion is formed with a large amount of foam holes within it.This coal gangue foamed concrete adopts following method to prepare: coal gangue is pulverized formed coal gangue powder or particle; In coal gangue powder or particle, add cement and water, fully stir, form the coal gangue concrete slurry; Foamed system by foaming machine fully foams whipping agent with mechanical system, and with foam and coal gangue concrete slurry uniform mixing, obtains coal gangue foamed concrete slurry; After coal gangue foamed concrete slurry solidifies, form the coal gangue foamed concrete.
Adopt coal gangue disposal methods coal gangue of the present invention can directly obtain coal gangue foamed concrete of the present invention.
Utilize the method in coal gangue foamed concrete backfill tunnel, comprise the steps:
(1) coal gangue is pulverized, formed coal gangue powder or particle;
(2) in coal gangue powder or particle that step (1) produces, add cement and water, fully stir, form the coal gangue concrete slurry;
(3) foamed system by foaming machine fully foams whipping agent with mechanical system, and with the coal gangue concrete slurry uniform mixing that foam and step (2) produce, forms coal gangue foamed concrete slurry;
(4) the coal gangue foamed concrete slurry that step (3) is produced is transported in the tunnel that needs backfill, promptly forms coal gangue foamed concrete obturator after coal gangue foamed concrete slurry solidifies in the tunnel.
In the method in aforementioned backfill tunnel, step (1) can be implemented in mine nearby.
In the method in aforementioned backfill tunnel, in step (4), can utilize concrete pump that coal gangue foamed concrete slurry is transported in the tunnel that needs backfill.
The present invention can obtain following beneficial effect: (1) proposes a kind of processing and recoverying and utilizing method of coal gangue, and the recoverying and utilizing method of coal gangue existing and that produce in the future is provided for coal mining enterprise; (2) coal gangue foamed concrete of the present invention can be used in roadbed, Guan Ji, abutment, high embankment, tunnel and other need fill the filling in location, need not mechanical tamping operation and can realize complete closely knit filling; (3) utilize coal gangue foamed concrete backfill mine laneway, need not coal gangue is transported to ground, realize handling nearby, reduce shipment and delivery cost, reduce the accumulation discharging of coal gangue, reduce land seizure, reduce and pollute, need not in mine, to transport the tunnel packing material, realize drawing materials nearby from ground, reduce shipment and delivery cost, and save packing material; (4) because of coal gangue foamed concrete slurry has good flowability, can flow to the All Ranges of mine laneway, the non-blind area filling is realized in the little and inner big zone of especially narrow, oral area, improves the integrity of filling, and eliminates safe hidden trouble; (5) the coal gangue foamed concrete has from filling and self-compacting ability, need not to carry out tamping operation, after the coal gangue foamed concrete solidifies, can in the tunnel, form stable, firm, closely knit obturator, sedimentation and leakage can not occur, eliminate safe hidden trouble; (6) because the coal gangue foamed concrete has light weight, and volume density is 300-1500kg/m3, is equivalent to about 1/5～1/10 of normal concrete, reduce that the tunnel ground is reached the pressure of body of wall on every side, improve security; (7) the coal gangue foamed concrete has crushing resistance, and ultimate compression strength is more than 1.2Mpa, and the tunnel after the backfill has the good pressure resistance energy, improves security; In addition, can also change ultimate compression strength by regulating its proportioning raw materials; (8) coal gangue foamed concrete slurry pumpability is good, can carry out long distance pumping, can be pumped to as required in the tunnel that needs to fill, and the operation injectability is strong, the mechanization degree height.
Embodiment
Below by embodiment, the coal gangue foamed concrete that coal gangue treatment process of the present invention, this method are formed and adopt the method for this coal gangue foamed concrete backfill mine laneway to be illustrated.
Embodiment 1
In mine, coal gangue is pulverized, formed the coal gangue powder; Coal gangue powder, cement, water are mixed and stirring according to 3: 4: 3 part by weight, form the coal gangue concrete slurry; Put into an amount of water and whipping agent in the foamed system of foaming machine, wherein the weight of whipping agent is 1% of coal gangue concrete slurry weight, and the foamed system by foaming machine adopts mechanical system fully to stir foaming, forms bubble solution; With aforementioned coal gangue concrete slurry and bubble solution uniform mixing and stirring, form coal gangue foamed concrete slurry; Adopt concrete pump that coal gangue foamed concrete mashing pump is delivered in the tunnel that needs backfill,, can flow to each corner in tunnel because coal gangue foamed concrete slurry has good flowability, fills certainly and self-compacting ability; After treating that coal gangue foamed concrete slurry solidifies, promptly in the tunnel, form closely knit coal gangue foamed concrete obturator.
Embodiment 2
In mine, coal gangue is pulverized, formed coal gangue particle; Coal gangue particle, cement, water are mixed and stirring according to 4: 3: 3 part by weight, form the coal gangue concrete slurry; Put into an amount of water and whipping agent in the foamed system of foaming machine, wherein the weight of whipping agent is 2% of coal gangue concrete slurry weight, and the foamed system by foaming machine adopts mechanical system fully to stir foaming, forms bubble solution; With aforementioned coal gangue concrete slurry and bubble solution uniform mixing and stirring, form coal gangue foamed concrete slurry; Adopt concrete pump that coal gangue foamed concrete mashing pump is delivered in the tunnel that needs backfill,, can flow to each corner in tunnel because coal gangue foamed concrete slurry has good flowability, fills certainly and self-compacting ability; After coal gangue foamed concrete slurry solidifies, promptly in the tunnel, form closely knit coal gangue foamed concrete obturator.
Embodiment 3
In mine, coal gangue is pulverized, formed the coal gangue powder; Coal gangue powder, cement, water are mixed and stirring according to 40: 25: 35 part by weight, form the coal gangue concrete slurry; Put into an amount of water and whipping agent in the foamed system of foaming machine, wherein the weight of whipping agent is 3% of coal gangue concrete slurry weight, and the foamed system by foaming machine adopts mechanical system fully to stir foaming, forms bubble solution; With aforementioned coal gangue concrete slurry and bubble solution uniform mixing and stirring, form coal gangue foamed concrete slurry; Adopt concrete pump that coal gangue foamed concrete mashing pump is delivered in the tunnel that needs backfill,, can flow to each corner in tunnel because coal gangue foamed concrete slurry has good flowability, fills certainly and self-compacting ability; After treating that coal gangue foamed concrete slurry solidifies, promptly in the tunnel, form closely knit coal gangue foamed concrete obturator.
Embodiment 4
In mine, coal gangue is pulverized, formed the coal gangue powder; Coal gangue powder, cement, water are mixed and stirring according to 3: 3: 4 part by weight, form the coal gangue concrete slurry; Put into an amount of water and whipping agent in the foamed system of foaming machine, wherein the weight of whipping agent is 5% of coal gangue concrete slurry weight, and the foamed system by foaming machine adopts mechanical system fully to stir foaming, forms bubble solution; With aforementioned coal gangue concrete slurry and bubble solution uniform mixing and stirring, form coal gangue foamed concrete slurry; Adopt concrete pump that coal gangue foamed concrete mashing pump is delivered in the tunnel that needs backfill,, can flow to each corner in tunnel because coal gangue foamed concrete slurry has good flowability, fills certainly and self-compacting ability; After treating that coal gangue foamed concrete slurry solidifies, promptly in the tunnel, form closely knit coal gangue foamed concrete obturator.
The present invention can also summarize with other specific forms without prejudice to spirit of the present invention or principal character.Above-mentioned embodiment of the present invention can only be thought can not limit the present invention to explanation of the present invention; claim has been pointed out technical scheme of the present invention and scope; therefore; in implication suitable and any modification in the scope, all will be understood that in the protection domain that is included in claim with the present invention.
Claims (13)
1. a coal gangue treatment process is characterized in that comprising the steps:
(1) coal gangue is pulverized, formed coal gangue powder or particle;
(2) in coal gangue powder or particle that step (1) produces, add cement and water, fully stir, form the coal gangue concrete slurry;
(3) foamed system by foaming machine fully foams whipping agent with mechanical system, and with the coal gangue concrete slurry uniform mixing that foam and step (2) produce, forms coal gangue foamed concrete slurry.
2. coal gangue treatment process according to claim 1 is characterized in that the weight percent of each component in the step (2) is: coal gangue powder or particle 20%--50%, cement 20%--50%, water 30%--60%.
3. coal gangue treatment process according to claim 2 is characterized in that the weight percent of each component in the step (2) is: coal gangue powder or particle 30%--50%, cement 20%--35%, water 30%--50%.
4. coal gangue treatment process according to claim 3 is characterized in that the weight percent of each component in the step (2) is: coal gangue powder or particle 40%, cement 25%, water 35%.
5. according to claim 1,2,3 or 4 described coal gangue treatment processs, it is characterized in that the described whipping agent of step (3) is metallic aluminium powder whipping agent, vegetable-protein whipping agent, animal protein foaming agent, sodium resinate class whipping agent, hydrolysis blood glue whipping agent or mahogany acid aluminium whipping agent, or wherein two or more mixtures.
6. coal gangue treatment process according to claim 5, the consumption that it is characterized in that the described whipping agent of step (3) are the 1%--10% of the coal gangue concrete slurry weight of step (2) generation.
7. coal gangue treatment process according to claim 6, the consumption that it is characterized in that the described whipping agent of step (3) are the 2%--5% of the coal gangue concrete slurry weight of step (2) generation.
8. coal gangue treatment process according to claim 7, the consumption that it is characterized in that the described whipping agent of step (3) are 3% of the coal gangue concrete slurry weight that produce of step (2).
9. coal gangue treatment process according to claim 1, it is characterized in that further comprising the steps: to make the jet orifice ejection of the coal gangue foamed concrete slurry of step (3) formation from foamed system afterwards in step (3), coal gangue foamed concrete slurry solidifies the back and forms the coal gangue foamed concrete.
10. a coal gangue foamed concrete contains cement and water, and its inside has a large amount of foam holes, it is characterized in that containing coal gangue powder or particle.
11. coal gangue foamed concrete according to claim 10 is characterized in that adopting following method preparation: coal gangue is pulverized formed coal gangue powder or particle; In coal gangue powder or particle, add cement and water, fully stir, form the coal gangue concrete slurry; Foamed system by foaming machine fully foams whipping agent with mechanical system, and with foam and coal gangue concrete slurry uniform mixing, obtains coal gangue foamed concrete slurry; After coal gangue foamed concrete slurry solidifies, form the coal gangue foamed concrete.
12. a method of utilizing coal gangue foamed concrete backfill tunnel is characterized in that comprising the steps:
(1) coal gangue is pulverized, formed coal gangue powder or particle;
(2) in coal gangue powder or particle that step (1) produces, add cement and water, fully stir, form the coal gangue concrete slurry;
(3) foamed system by foaming machine fully foams whipping agent with mechanical system, and with the coal gangue concrete slurry uniform mixing that foam and step (2) produce, forms coal gangue foamed concrete slurry;
(4) the coal gangue foamed concrete slurry that step (3) is produced is transported in the tunnel that needs backfill, promptly forms coal gangue foamed concrete obturator after coal gangue foamed concrete slurry solidifies in the tunnel.
13. the method for utilizing coal gangue foamed concrete backfill tunnel according to claim 12 is characterized in that utilizing in the step (4) concrete pump that the coal gangue foamed concrete slurry that step (3) produces is transported in the tunnel that needs backfill.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101062938A CN102285772A (en) | 2011-04-27 | 2011-04-27 | Coal-gangue processing method, coal-gangue foamed concrete and laneway backfilling method |
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| CN2011101062938A CN102285772A (en) | 2011-04-27 | 2011-04-27 | Coal-gangue processing method, coal-gangue foamed concrete and laneway backfilling method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478467A (en) * | 2014-11-24 | 2015-04-01 | 湖南科技大学 | Preparation method of coal gangue foam concrete |
| CN104591601A (en) * | 2015-01-23 | 2015-05-06 | 安徽理工大学 | Superpoly-gangue concrete and preparation method thereof |
| CN110436961A (en) * | 2019-05-31 | 2019-11-12 | 中国建筑股份有限公司 | Cell concrete, insulated compound trabs based on gangue and preparation method thereof |
| CN111117629A (en) * | 2019-12-16 | 2020-05-08 | 山西大学 | Coal gangue porous soil conditioner and preparation method thereof |
| CN111517704A (en) * | 2020-04-30 | 2020-08-11 | 河南工业和信息化职业学院 | Coal slime-based roadway bottom paving material and preparation method thereof |
| CN113173747A (en) * | 2021-05-11 | 2021-07-27 | 利辛县汝集镇南阳墙体材料有限公司 | Preparation method of environment-friendly sludge coal gangue concrete |
| CN113187540A (en) * | 2021-04-28 | 2021-07-30 | 华电宁夏灵武发电有限公司 | Backfill method for abandoned mine roadway |
| CN113955980A (en) * | 2021-10-19 | 2022-01-21 | 中国建设基础设施有限公司 | Preparation method of coal gangue-based fine particle filling material |
| CN114890731A (en) * | 2022-03-24 | 2022-08-12 | 江南大学 | Coal gangue foam concrete for filling and preparation method thereof |
-
2011
- 2011-04-27 CN CN2011101062938A patent/CN102285772A/en active Pending
Non-Patent Citations (1)
| Title |
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| 《中国优秀硕士学位论文全文数据库 工程科技II辑》 20080515 李德军 煤矸石泡沫混凝土的研究 第9-12页 1-12 , 第5期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478467A (en) * | 2014-11-24 | 2015-04-01 | 湖南科技大学 | Preparation method of coal gangue foam concrete |
| CN104591601A (en) * | 2015-01-23 | 2015-05-06 | 安徽理工大学 | Superpoly-gangue concrete and preparation method thereof |
| CN110436961A (en) * | 2019-05-31 | 2019-11-12 | 中国建筑股份有限公司 | Cell concrete, insulated compound trabs based on gangue and preparation method thereof |
| CN111117629A (en) * | 2019-12-16 | 2020-05-08 | 山西大学 | Coal gangue porous soil conditioner and preparation method thereof |
| CN111517704A (en) * | 2020-04-30 | 2020-08-11 | 河南工业和信息化职业学院 | Coal slime-based roadway bottom paving material and preparation method thereof |
| CN113187540A (en) * | 2021-04-28 | 2021-07-30 | 华电宁夏灵武发电有限公司 | Backfill method for abandoned mine roadway |
| CN113173747A (en) * | 2021-05-11 | 2021-07-27 | 利辛县汝集镇南阳墙体材料有限公司 | Preparation method of environment-friendly sludge coal gangue concrete |
| CN113955980A (en) * | 2021-10-19 | 2022-01-21 | 中国建设基础设施有限公司 | Preparation method of coal gangue-based fine particle filling material |
| CN114890731A (en) * | 2022-03-24 | 2022-08-12 | 江南大学 | Coal gangue foam concrete for filling and preparation method thereof |
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Application publication date: 20111221 |