CN101979837A - Method for improving strength of full-tailings filling body under low-temperature environment - Google Patents
Method for improving strength of full-tailings filling body under low-temperature environment Download PDFInfo
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- CN101979837A CN101979837A CN 201010268172 CN201010268172A CN101979837A CN 101979837 A CN101979837 A CN 101979837A CN 201010268172 CN201010268172 CN 201010268172 CN 201010268172 A CN201010268172 A CN 201010268172A CN 101979837 A CN101979837 A CN 101979837A
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Abstract
The invention discloses a method for improving strength of a full-tailings filling body under a low-temperature environment. The method comprises the following steps of: grading full tailings into graded tailings and overflow tailings; and heating the graded tailings to an expected temperature, mixing with the overflow tailings, making the mixed fillers reach the temperature of over 20 DEG C, and filling the mixed fillers into an underground goaf so as to improve the strength of the filling body. In the method, the problem that full-tailings filling cannot be performed in a low-temperature region or the filling body cannot reach the strength for safe mining is solved, the tailings storage on the earth surface is saved, a series of cost needed for constructing a tailings storeroom is reduced, the pollution on local natural environment is greatly reduced, the potential safety hazard of the tailings storeroom is eliminated or reduced, the strength of the stope filling body also can be improved, the ground collapse can be prevented or alleviated by filling the full tailings into the goaf, the mining operating environment is safer, the aim of protecting the environment is fulfilled, and good economic and social benefits are brought.
Description
Technical field
The invention belongs to the complete tailing-filled technical field of down-hole mining engineering, relate to a kind of method that improves complete tailing-filled body intensity based on low temperature environment down.
Background technology
In recent years, along with the appearance of a series of relevant laws and regulations in mining industry aspect, energy-saving and emission-reduction become the mining development Eternal Theme.And select factory's tailings is handled needs energy-saving and emission-reduction in the mining development especially a emphasis.To selecting factory's tailings to carry out the full tail filling in down-hole; realize zero-emission; to have following some advantage: can reduce face of land tailings storage capacity and amass or do not establish the mine tailing storehouse; significantly reduce pollution to local natural environment; eliminate or reduce the potential safety hazard in mine tailing storehouse, reduce fees paid for taking rural land to the mine tailing storehouse, maintenance expense, pollution charges etc., after full tailings charges into underground goaf; can prevent or alleviate surface subsidence, reach the purpose of protection environment.But under low temperature environment, as carry out tailing-filledly entirely in time below 10 ℃, according to former experimental data and related data, the intensity of obturation is low more than 50% than more than 20 ℃ the time, the intensity of obturation does not reach the mining safety requirement.So should guarantee to guarantee mining safety again under the situation that casting resin makes full use of, the intensity of obturation is improved, there is the problem that how to improve strength of filling mass between this.For this reason, we have invented a kind of new method that improves complete tailing-filled body intensity based on low temperature environment down.
Summary of the invention
The purpose of this invention is to provide the method that improves complete tailing-filled body intensity under a kind of low temperature environment, make strength of filling mass satisfy the safety requirements of mining technology regulation, realize zero-emission, overcome in the past at low temp area and can not carry out the shortcoming that complete tailing-filled or obturation does not reach safe mining intensity.
A kind of low temperature environment improves the method for complete tailing-filled body intensity down, it is characterized in that: earlier full tailings is carried out classification, become classified tailings and overflow tailings, then classified tailings is heated, after reaching desired temperature, mix with the overflow tailings again, the temperature of mixed filling material is reached charge into underground goaf more than 20 ℃, improve the intensity of obturation.Only heat classified tailings rather than heat full tailings and can save the energy, raise the efficiency; Utilize the waste heat of classified tailings that the thinner overflow tailings temperature of granularity is improved.
A kind of low temperature environment improves the method for complete tailing-filled body intensity down, it is characterized in that:, when classified tailings is heated, by water-tube boiler steam is heated, make the steam of generation have certain pressure, lead to the classified tailings storehouse by steam pipe and nozzle, this steam can replace the compressed air that the activation mortar is used, steam was emitted the latent heat of vaporization to the lower tailings of temperature with the water that is contained in the tailings before this in the sand storehouse, condense into saturation water, and then the cooling heat release is to a certain temperature that is higher than design temperature, this temperature is relevant to factors such as fine-graded proportioning and prevailing circumstances temperature with classified tailings, liberated heat and tailings and the water heat absorption that originally was contained in the tailings balance each other thus, and the temperature of last mortar is risen.
The inventive method has following advantage: it has solved can not carry out complete tailing-filled or obturation at low temp area and not reach the strength problem of safety mining, and the heating tailings is filled and can be improved the tailings flow velocity, makes strength enhancing.Having saved face of land tailings stores up; need build a series of expenses that the mine tailing storehouse produces; significantly reduced pollution, eliminated or reduced the potential safety hazard in mine tailing storehouse, reduced fees paid for taking rural land to the mine tailing storehouse, maintenance expense, pollution charges etc. local natural environment; can also improve the intensity of stope filling body; after full tailings charges into underground goaf, can prevent or alleviate surface subsidence, make the mining environment safer; reach the purpose of protection environment, produced good economic benefits and social benefit.
Description of drawings
Accompanying drawing is a classified tailings heating system schematic diagram in the inventive method.
The specific embodiment
Describe the embodiment of the inventive method below in detail:
The inventive method preferred implementation is: earlier full tailings is carried out classification, become classified tailings and overflow tailings, classified tailings concentration is 76%, and overflow tailings concentration is 54%～70%, carries out lectotype selection according to situations such as site environment temperature and experience then, the design heating system, casting resin is heated to classified tailings then, reach desired temperature after, mix with the overflow tailings again, make the temperature of mixed filling material reach 21 ℃ and charge into underground goaf, improve the intensity of obturation.For water steam heated last mortar, filling system need be established a combustion gas water-tube boiler 2.The steam jet 7 that the system of classified tailings heating is comprised feed pump 1, combustion gas water-tube boiler 2, steam pipework 3, air-introduced machine 4, steam collector 6, band one way valve, water becomes steam by 2 heating of combustion gas water-tube boiler after feed pump 1 supercharging, water vapour heats by 7 pairs of classified tailingses of steam jet of steam pipework 3, steam collector 6 and band one way valve, and 4 pairs of combustion gas water-tube boilers of air-introduced machine are smoked.When beginning to heat, by the heating of the 2 pairs of steam of combustion gas water-tube boiler, make the steam of generation lead to classified tailings storehouse 5, the nozzle 7 by steam collector 6 and band one way valve is with certain pressure, as (4.9～5.2) * 10
5Pa.Can emit by putting sandpipe 8 through the tailings of steam heating in the classified tailings storehouse 5.This steam can replace the compressed air that the activation mortar is used, steam was emitted the latent heat of vaporization to the lower tailings of temperature with the water that is contained in the tailings before this in the sand storehouse, condense into saturation water, saturated water temperature is 151.9 ℃, and then the cooling heat release is to a certain temperature that is higher than design temperature (for example 20 ℃) (this temperature is relevant to factors such as fine-graded proportioning and prevailing circumstances temperature with classified tailings), liberated heat and tailings and the water heat absorption that originally was contained in the tailings balance each other thus, and the temperature of last mortar is risen.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, then should be considered as belonging to the protection domain that claims that the present invention submits to are determined.
Claims (3)
1. a low temperature environment improves the method for complete tailing-filled body intensity down, it is characterized in that: earlier full tailings is carried out classification, become classified tailings and overflow tailings, then classified tailings is heated, after reaching desired temperature, mix with the overflow tailings again, the temperature of mixed filling material is reached charge into underground goaf more than 20 ℃, improve the intensity of obturation.
2. low temperature environment according to claim 1 improves the method for complete tailing-filled body intensity down, it is characterized in that: when classified tailings is heated, by water-tube boiler steam is heated, make the steam of generation have certain pressure, lead to the classified tailings storehouse by steam pipe and nozzle, this steam can replace the compressed air that the activation mortar is used.
3. low temperature environment according to claim 1 and 2 improves the method for complete tailing-filled body intensity down, it is characterized in that: the system to the classified tailings heating comprises feed pump (1), combustion gas water-tube boiler (2), steam pipework (3), air-introduced machine (4), steam collector (6), the steam jet (7) of band one way valve, water becomes steam by combustion gas water-tube boiler (2) heating after feed pump (1) supercharging, water vapour is by steam pipework (3), the steam jet (7) of steam collector (6) and band one way valve heats classified tailings, and air-introduced machine (4) is smoked to the combustion gas water-tube boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010268172 CN101979837A (en) | 2010-08-31 | 2010-08-31 | Method for improving strength of full-tailings filling body under low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010268172 CN101979837A (en) | 2010-08-31 | 2010-08-31 | Method for improving strength of full-tailings filling body under low-temperature environment |
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| CN101979837A true CN101979837A (en) | 2011-02-23 |
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| CN 201010268172 Pending CN101979837A (en) | 2010-08-31 | 2010-08-31 | Method for improving strength of full-tailings filling body under low-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837413A (en) * | 2017-01-26 | 2017-06-13 | 西安科技大学 | High temperature deep well goaf filling slurry cold-storage induction system and method |
| CN114033479A (en) * | 2021-10-20 | 2022-02-11 | 北京科技大学 | Device and method for improving strength of in-situ filling body by utilizing far infrared heating technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049115A1 (en) * | 1997-04-24 | 1998-11-05 | Sungeric International Inc. | High pulp density, fast setting and high early strength backfill method and material |
| CN1424275A (en) * | 2003-01-10 | 2003-06-18 | 中国矿业大学（北京校区） | Cementing materials for filling, slurry and preparing and filling processes |
| CN101219877A (en) * | 2008-02-03 | 2008-07-16 | 云南驰宏锌锗股份有限公司 | Mix mine tail sand-lead smelting slag plaster body preparing method |
| CN101469614A (en) * | 2007-12-27 | 2009-07-01 | 中国恩菲工程技术有限公司 | Filling apparatus and filling technique |
-
2010
- 2010-08-31 CN CN 201010268172 patent/CN101979837A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049115A1 (en) * | 1997-04-24 | 1998-11-05 | Sungeric International Inc. | High pulp density, fast setting and high early strength backfill method and material |
| CN1424275A (en) * | 2003-01-10 | 2003-06-18 | 中国矿业大学（北京校区） | Cementing materials for filling, slurry and preparing and filling processes |
| CN101469614A (en) * | 2007-12-27 | 2009-07-01 | 中国恩菲工程技术有限公司 | Filling apparatus and filling technique |
| CN101219877A (en) * | 2008-02-03 | 2008-07-16 | 云南驰宏锌锗股份有限公司 | Mix mine tail sand-lead smelting slag plaster body preparing method |
Non-Patent Citations (1)
| Title |
|---|
| 《中国矿业》 20010924 崔刚 充填模拟***及其自动控制初步方案 第10卷, 第05期 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837413A (en) * | 2017-01-26 | 2017-06-13 | 西安科技大学 | High temperature deep well goaf filling slurry cold-storage induction system and method |
| CN106837413B (en) * | 2017-01-26 | 2017-11-21 | 西安科技大学 | High temperature deep well goaf filling slurry cold-storage induction system and method |
| CN114033479A (en) * | 2021-10-20 | 2022-02-11 | 北京科技大学 | Device and method for improving strength of in-situ filling body by utilizing far infrared heating technology |
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Application publication date: 20110223 |