CN110953019A - Method for improving early strength of filling body by using microwave technology - Google Patents
Method for improving early strength of filling body by using microwave technology Download PDFInfo
- Publication number
- CN110953019A CN110953019A CN202010001100.1A CN202010001100A CN110953019A CN 110953019 A CN110953019 A CN 110953019A CN 202010001100 A CN202010001100 A CN 202010001100A CN 110953019 A CN110953019 A CN 110953019A
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- filling
- filling body
- microwave
- slurry
- early strength
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a method for improving the early strength of a filling body by utilizing a microwave technology, which comprises the steps of preparing filling slurry, conveying the slurry, supplying power and heating, fully and uniformly stirring tailings, cement and water in a stirring barrel in proportion, conveying the mixture to an underground filling goaf through a pipeline in a gravity self-flow conveying mode, starting a microwave heating device to heat the filling body after the filling is finished, and moving the filling body through a preset automatic working parameter adjusting device to heat the filling body in a layered and sectional manner. By microwave heating, the cement hydration reaction rate is accelerated, the curing time of the filling body is shortened, and meanwhile, free water molecules in capillary pores of the filling body can be rapidly removed from the internal structure of the filling body before the filling body is condensed, so that the filling body is subjected to plastic shrinkage, the capillary pores are collapsed, the microstructure is densified, and the early strength of the filling body is rapidly improved.
Description
Technical Field
The invention relates to a filling mining technology, in particular to a method for improving the early strength of a filling body by using a microwave technology.
Background
The development of mineral resources has an important promoting effect on the progress of the human society, the development and utilization of the mineral resources cannot be separated no matter in industrial development or infrastructure construction, with the exhaustion of shallow mineral resources, mining is gradually shifted to the development of deep resources, namely, open-pit mining is gradually shifted to underground mining, and through years of research and development, the following three underground mining methods are formed: caving, open field and filling. The traditional caving method or open stope method mining brings many problems while promoting economic development, and the filling mining method has the advantages of high recovery rate, small dilution, capability of effectively controlling stope ground pressure, high solid waste utilization rate and the like, so that the filling mining method becomes a mainstream method for developing deep resources of a current mine and is widely applied to a plurality of metal mines.
In the filling mining method, the cemented filling mining process is currently most widely applied at home and abroad. The cemented filling is a filling process that acquired and processed inert materials such as tailings and the like and cementing materials such as cement and the like are mixed and stirred with water to prepare cemented filling slurry, and then the cemented filling slurry is conveyed to a goaf in a pipeline pumping or gravity self-flowing mode to form a filling body with certain strength and integrity.
At present, the filling body has the problems of low solidification speed, long solidification time and the like.
Disclosure of Invention
The invention aims to provide a method for improving the early strength of a filling body by using a microwave technology, which utilizes the microwave heating principle to heat the filling body in a stope and improve the curing temperature of the filling body at the early curing stage so as to achieve the aims of accelerating the cement hydration reaction rate, shortening the curing time of the filling body and quickly improving the early strength of the filling body.
The purpose of the invention is realized by the following technical scheme:
the method for improving the early strength of the filling body by using the microwave technology comprises the following steps:
preparing slurry: preparing slurry by adopting a stirring barrel stirring mode, conveying the tailings, the cement and the water into the stirring barrel in proportion, and fully stirring for a period of time to prepare high-concentration homogeneous cemented filling slurry;
slurry conveying: opening a discharge port of the stirring barrel, putting the stirred filling slurry into a filling pipe, and conveying the slurry to the underground filling goaf by a gravity-fed conveying mode to form a filling body;
power supply and heating: the microwave power supply is provided through power supply equipment, a guide rail is paved on an underground transportation roadway, a microwave heating device is installed on the guide rail, and the filling body is heated in a layered and sectional manner.
According to the technical scheme provided by the invention, the method for improving the early strength of the filling body by using the microwave technology provided by the embodiment of the invention can realize heating maintenance of the filling body at the initial curing stage in a stope in a microwave heating mode, thereby achieving the purposes of shortening the curing time of the filling body and quickly improving the early strength of the filling body and ensuring the efficient operation of stoping work.
Drawings
Fig. 1 is a schematic process flow diagram of a method for improving early strength of a filling body by using a microwave technology according to an embodiment of the present invention.
Fig. 2 is a schematic field configuration diagram according to an embodiment of the present invention.
Fig. 3 is a schematic view of a microwave heating field according to an embodiment of the present invention.
In the figure:
1-cement silo, 2-filling water, 3-sand silo, 4-power supply, 5-stirring barrel, 6-earth surface, 7-cable, 8-filling pipeline, 9-guide rail, 10-filling body, 11-microwave heating device, 12-filling pipeline, 13-water filter pipe, 14-stope roof, 15-filling retaining wall, 16-mine pillar and 17-stope floor.
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention discloses a method for improving the early strength of a filling body by utilizing a microwave technology, which comprises the following preferred specific implementation modes:
the method comprises the following steps:
preparing slurry: preparing slurry by adopting a stirring barrel stirring mode, conveying the tailings, the cement and the water into the stirring barrel in proportion, and fully stirring for a period of time to prepare high-concentration homogeneous cemented filling slurry;
slurry conveying: opening a discharge port of the stirring barrel, putting the stirred filling slurry into a filling pipe, and conveying the slurry to the underground filling goaf by a gravity-fed conveying mode to form a filling body;
power supply and heating: the microwave power supply is provided through power supply equipment, a guide rail is paved on an underground transportation roadway, a microwave heating device is installed on the guide rail, and the filling body is heated in a layered and sectional manner.
In the slurry preparation process, the flow rates of tailings, cement and water and the discharge of the filling slurry are measured by a measuring device according to the scale of the filling preparation station and the difference of the equipment level.
The microwave heating device is automatic equipment, working parameters are set before starting, and when the microwave heating on the same part is over 3min, the microwave heating device automatically moves to the next part for continuous heating.
The microwave heating device generates microwaves by a magnetron, the microwaves are transmitted to the horn antenna through the rectangular waveguide, the horn antenna radiates outwards, and the waveguide is 42cm wide, 18cm high and 60cm long, and the horn antenna is 100cm wide, 100cm high and 80cm long.
The distance between the horn antenna of the microwave heating device and the filling retaining wall is 20 cm.
And a rotor is arranged in front of the microwave heating device.
The method is used for carrying out early heating maintenance on the filling body in the filling stope.
According to the method for improving the early strength of the filling body by using the microwave technology, the heating maintenance of the filling body at the initial curing stage can be realized in a stope in a microwave heating mode, so that the aims of shortening the curing time of the filling body and quickly improving the early strength of the filling body are fulfilled, and the efficient operation of the stope work is ensured.
The microwave heating in the invention has the following functions:
when microwave is applied to cement during hydration reaction, because the relative dielectric constant of water is higher than that of cement, energy is transferred from electromagnetic field to molecular bond of water to make molecular bond vibrate when microwave interacts with filling body component. Energy is transmitted in the filling body in a heat mode, the initial curing temperature of the filling body is increased, the hydration reaction of cement is accelerated, the solidification of the filling body is accelerated, and the solidification time is shortened.
Microwave energy is applied to the pack to rapidly remove free water molecules from the pack capillaries from the pack internal structure prior to setting of the pack, thereby plastically shrinking the pack, causing the capillaries to collapse and densify the microstructure, thereby increasing pack strength.
The specific embodiment is as follows:
as shown in fig. 1, 2 and 3, the tailings, the cement and the water are proportionally conveyed into a stirring barrel, and are fully stirred for a period of time to prepare high-concentration homogeneous cemented filling slurry; and then, opening a discharge port of the stirring barrel, putting the stirred filling slurry into a filling pipe, and conveying the filling slurry into the underground filling goaf in a gravity-flow conveying mode. In the process, the discharging of the tailings, the cement, the water and the filling slurry has corresponding metering modes, the instantaneous flow can be displayed in a control room, the instantaneous and accumulated flows can be continuously recorded, and the proportional control device can automatically adjust according to the preset flow and the proportion to keep the proportion stable.
Reasonable power supply equipment is selected to provide a microwave power supply; after filling, setting working parameters of the microwave heating device, starting the microwave heating device to heat the filling body, and moving to the next part to continue heating when the same part is subjected to microwave heating for more than 5 min. The rotor is arranged in front of the microwave heating device to achieve the purpose of dispersing microwaves, so that the filling body is uniformly heated in a layered and segmented manner.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for improving the early strength of a filling body by utilizing a microwave technology is characterized by comprising the following steps:
preparing slurry: preparing slurry by adopting a stirring barrel stirring mode, conveying the tailings, the cement and the water into the stirring barrel in proportion, and fully stirring for a period of time to prepare high-concentration homogeneous cemented filling slurry;
slurry conveying: opening a discharge port of the stirring barrel, putting the stirred filling slurry into a filling pipe, and conveying the slurry to the underground filling goaf by a gravity-fed conveying mode to form a filling body;
power supply and heating: the microwave power supply is provided through power supply equipment, a guide rail is paved on an underground transportation roadway, a microwave heating device is installed on the guide rail, and the filling body is heated in a layered and sectional manner.
2. The method for improving the early strength of a filling body by using the microwave technology as claimed in claim 1, wherein in the process of preparing the slurry, the flow rates of the tailings, the cement and the water and the discharge of the filling slurry are measured by a measuring device according to the scale of a filling preparation station and the equipment level.
3. The method for improving the early strength of the filling body by using the microwave technology as claimed in claim 2, wherein the microwave heating device is an automatic device, the working parameters are set before starting, and when the microwave heating on the same part exceeds 3min, the microwave heating device automatically moves to the next part to continue heating.
4. The method for improving the early strength of the filling body by using the microwave technology as claimed in claim 3, wherein the microwave heating device generates the microwave by a magnetron, the microwave is transmitted to the horn antenna through a rectangular waveguide, the microwave is radiated outwards by the horn antenna, the waveguide is 42cm wide, 18cm high and 60cm long, and the horn antenna is 100cm wide, 100cm high and 80cm long.
5. The method for improving the early strength of the filling body by using the microwave technology as claimed in claim 4, wherein the distance between the horn antenna of the microwave heating device and the filling retaining wall is 20 cm.
6. The method for improving the early strength of a filling body by using the microwave technology according to claim 5, wherein a rotor is installed in front of the microwave heating device.
7. The method for improving the early strength of the filling body by using the microwave technology according to any one of claims 1 to 6, which is used for carrying out early heating maintenance on the filling body in a filling stope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001100.1A CN110953019B (en) | 2020-01-02 | 2020-01-02 | Method for improving early strength of filling body by using microwave technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001100.1A CN110953019B (en) | 2020-01-02 | 2020-01-02 | Method for improving early strength of filling body by using microwave technology |
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| CN110953019A true CN110953019A (en) | 2020-04-03 |
| CN110953019B CN110953019B (en) | 2021-03-16 |
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| CN202010001100.1A Expired - Fee Related CN110953019B (en) | 2020-01-02 | 2020-01-02 | Method for improving early strength of filling body by using microwave technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114109489A (en) * | 2021-11-26 | 2022-03-01 | 安徽马钢矿业资源集团姑山矿业有限公司 | Heating device for increasing temperature of stope filling body and using method thereof |
| CN115054932A (en) * | 2022-08-19 | 2022-09-16 | 矿冶科技集团有限公司 | Concentrated full-tailing solidification and stockpiling system and method for carrying out concentrated full-tailing solidification and stockpiling by using same |
| CN115837393A (en) * | 2022-12-08 | 2023-03-24 | 东北大学 | High-sulfur tailing resource utilization system and method based on microwave desulfurization recovery and residual sulfur activated slag solidification |
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|---|---|---|---|---|
| CN1712379A (en) * | 2004-06-25 | 2005-12-28 | 中南大学 | Method and system for treating high sulfur contained tails as binding filler aggregates |
| CN103114871A (en) * | 2013-03-04 | 2013-05-22 | 刘永杰 | Extraction device and method utilizing microwave coal heating layer |
| CN103470303A (en) * | 2013-10-02 | 2013-12-25 | 黑龙江宏宇电站设备有限公司 | Mine filling system and filling method thereof |
| CN204352833U (en) * | 2014-11-19 | 2015-05-27 | 飞翼股份有限公司 | A kind of stirring system |
| CN105256787A (en) * | 2015-09-08 | 2016-01-20 | 西安科技大学 | Microwave heating and strengthening method for collapsible loess foundation |
| CN106065783A (en) * | 2016-07-20 | 2016-11-02 | 铜陵有色设计研究院 | Device for filling and using method thereof for extensive non-metal mine |
-
2020
- 2020-01-02 CN CN202010001100.1A patent/CN110953019B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712379A (en) * | 2004-06-25 | 2005-12-28 | 中南大学 | Method and system for treating high sulfur contained tails as binding filler aggregates |
| CN103114871A (en) * | 2013-03-04 | 2013-05-22 | 刘永杰 | Extraction device and method utilizing microwave coal heating layer |
| CN103470303A (en) * | 2013-10-02 | 2013-12-25 | 黑龙江宏宇电站设备有限公司 | Mine filling system and filling method thereof |
| CN204352833U (en) * | 2014-11-19 | 2015-05-27 | 飞翼股份有限公司 | A kind of stirring system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114033479B (en) * | 2021-10-20 | 2023-01-17 | 北京科技大学 | Device and method for improving strength of in-situ filling body by utilizing far infrared heating technology |
| CN114109489A (en) * | 2021-11-26 | 2022-03-01 | 安徽马钢矿业资源集团姑山矿业有限公司 | Heating device for increasing temperature of stope filling body and using method thereof |
| CN115054932A (en) * | 2022-08-19 | 2022-09-16 | 矿冶科技集团有限公司 | Concentrated full-tailing solidification and stockpiling system and method for carrying out concentrated full-tailing solidification and stockpiling by using same |
| CN115837393A (en) * | 2022-12-08 | 2023-03-24 | 东北大学 | High-sulfur tailing resource utilization system and method based on microwave desulfurization recovery and residual sulfur activated slag solidification |
| CN115837393B (en) * | 2022-12-08 | 2024-04-26 | 东北大学 | High-sulfur tailing recycling system and method based on microwave desulfurization recovery and residual sulfur excitation slag solidification |
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| CN110953019B (en) | 2021-03-16 |
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