CN112431631A - Coal-based solid waste-based goaf controllable paste filling method - Google Patents
Coal-based solid waste-based goaf controllable paste filling method Download PDFInfo
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- CN112431631A CN112431631A CN202011414141.XA CN202011414141A CN112431631A CN 112431631 A CN112431631 A CN 112431631A CN 202011414141 A CN202011414141 A CN 202011414141A CN 112431631 A CN112431631 A CN 112431631A
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- 239000003245 coal Substances 0.000 title claims abstract description 36
- 239000002910 solid waste Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000011358 absorbing material Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000005065 mining Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a goaf controllable paste filling method based on coal-based solid waste, and belongs to the field of goaf paste filling; a goaf controllable paste filling method based on coal-based solid waste comprises the following steps: preparing a coal-based paste, reserving a moving space of filling equipment, constructing a filling and grouting space, adjusting concentration and filling the paste; the traditional paste filling equipment is upgraded, secondary processing is carried out on a working face, the concentration of the filled paste can be manually controlled, the paste filling working efficiency is improved, coal-based solid waste materials are reasonably utilized, the environment is protected, the performance of the filling material is effectively improved, and the strategic support effect is realized on the sustainable development of paste filling in the future.
Description
Technical Field
The invention belongs to the field of goaf paste filling, and particularly relates to a goaf controllable paste filling method based on coal-based solid waste.
Background
The paste filling technology is an advanced technology for preparing toothpaste-like slurry by compounding surface waste materials, cementing materials, water and the like and carrying out backfill sealing on the underground goaf; the mining filling cost is greatly reduced due to the paste filling, and the roof contact performance and the integrity of the filling body are good, so that the ground pressure can be effectively controlled, and the safety level of mining activities is improved; at present, paste filling mining provides a safe and efficient way for mining mineral resources with the characteristics of deep burial, roof breaking and the like, and has the advantages of unique technology economy, environmental protection and safety; however, in the traditional paste filling process, the concentration of the paste is not controllable, so that the paste filling efficiency is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the purpose of the disclosure is to provide a goaf controllable paste filling method based on coal-based solid waste, and the problem that the concentration of the filling paste is uncontrollable in the prior art is solved.
The purpose of the disclosure can be realized by the following technical scheme: a goaf controllable paste filling method based on coal-based solid waste is characterized by comprising the following steps:
the method comprises the following steps: preparing coal-based solid waste paste;
step two: reserving a moving space of the filling equipment;
step three: constructing a filling grouting space;
step four: and (3) concentration adjustment: conveying the coal-based solid waste paste in the storage chamber to a working surface, and injecting the coal-based solid waste paste into filling equipment for concentration adjustment; adding a water absorbing material into the coal-based solid waste paste to increase the concentration of the paste;
step five: filling paste: and operating the filling equipment to fill the paste on the working surface.
Furthermore, the ground configuration concentration of the paste in the step one should be 5% -15%, and the filling concentration in the step five should be 75% -85%.
Further, the water absorbing material in the fourth step is glass water.
Further, the coal-based solid waste paste body in the step one comprises 15-30% of fly ash, 30-40% of gasified slag, 20-40% of furnace bottom slag, 10-25% of desulfurized gypsum and 10-25% of cement and other additives.
The beneficial effect of this disclosure: the concentration of the filling paste can be controlled, and the paste filling work efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a goaf controllable paste filling method based on coal-based solid waste, which is used for implementing the invention;
FIG. 2 is a side view of a goaf controllable paste filling method based on coal-based solid waste, which implements the invention;
FIG. 3 is a schematic view showing an internal structure of a filling apparatus;
FIG. 4 is a broken-line statistical chart of uniaxial compressive strength of paste-filled test pieces of different concentrations in this example.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
A goaf controllable paste filling method based on coal-based solid waste comprises the following steps:
step one, preparing coal-based solid waste paste;
selecting a proper coal-based solid waste filling material according to the lithology of the rock stratum above the mine stope face, and configuring on the ground: mixing with ordinary cement and coal gangue, stirring, adding water to prepare a low-concentration paste, and then conveying to an underground storage chamber;
the ground configuration concentration of the paste is required to be low, so that the paste is favorably conveyed in a long distance;
the following experiments were made for the ground configuration concentration value of the paste:
1) paste bodies with different concentrations are respectively prepared on the ground: 5%, 10%, 15%, 20% and 25% concentration;
2) measuring and counting horizontal conveyable distances of pastes with different concentrations under the condition of pressurizing and conveying of a filling pump; the experimental data are as follows:
3) analyzing the data to obtain: when the ground configuration concentration of the paste is 10% -15%, the horizontal conveyable distance is farthest, and the transmission effect is better;
in this embodiment, the coal-based solid waste paste comprises 15% to 30% of fly ash, 30% to 40% of gasified slag, 20% to 40% of furnace bottom slag, 10% to 25% of desulfurized gypsum, and 10% to 25% of cement and other additives.
Reserving a moving space of filling equipment;
in the embodiment, as shown in fig. 2, a device for controllably filling paste in a goaf based on coal-based solid waste comprises a hydraulic support 3 and a filling device 6, and a space for the movement of the filling device 6 after a sudden movement is left in the goaf 1 at the rear by controlling the hydraulic support 3 to advance.
Step three, constructing a filling grouting space;
as shown in fig. 1, a flexible film 2 is fixedly connected to the rear surface of the hydraulic support 3, the flexible film 2 is used for covering the rear surface of the hydraulic support 3, and when a gob behind the hydraulic support 3 is filled with paste, the flexible film 2 can effectively prevent the paste from sputtering on the surface of the hydraulic support 3 and being difficult to clean.
Step four, concentration adjustment;
conveying the coal-based solid waste paste in the storage chamber to a working surface, and injecting the coal-based solid waste paste into filling equipment for concentration adjustment;
as shown in fig. 3, the filling device 6 comprises an inlet end 9, an outlet end 5, a water absorption storage box 6-1 and a spiral drill rod 6-2, the water absorption storage box 6-1 is positioned inside the filling device 6, water absorption materials are stored in the water absorption storage box 6-1, coal-based solid waste paste in the storage chamber enters the filling device 6 from the inlet end 9, the water absorption materials inside the water absorption storage box 6-1 are mixed with the paste, and the paste with a certain concentration is obtained by stirring through the spiral drill rod 6-2;
the upper end of the water absorption storage box 6-1 is provided with a loading top plate 7, and the loading top plate 7 is used for sealing the upper end part of the water absorption storage box 6-1 so as to avoid the failure of the water absorption material in the water absorption storage box 6-1 caused by the air entering the water absorption storage box; in addition, the water absorbing material can be injected into the water absorbing storage box 6-1 by opening the loading top plate 7;
in this embodiment, the water-absorbing material uses water glass to increase the paste concentration and improve the filling effect, but the water-absorbing material includes, but is not limited to, water glass as long as the water-absorbing effect can be achieved and the paste concentration can be increased.
Step five, filling paste;
connecting the coal-based solid waste paste in the storage chamber with an inlet end 9 of a filling device 6, mixing the coal-based solid waste paste with a water-absorbing material in the device according to design requirements, and discharging the mixture from an outlet end 5 after adjusting the concentration of the paste;
the lower end of the filling device 6 is provided with a traveling wheel 8 which rolls on the working surface, the filling device 6 is pushed to one end of the working surface, filling and slowly pulling are carried out until paste grouting filling is completed in the whole space, and the recovery device is reused after the working surface is pushed.
Before the paste is filled, the concentration of the paste is controlled to increase the concentration of the paste, which is beneficial to improving the strength of a paste filling material; the following experiment was performed for the concentration value at the time of filling the paste:
1) adding different amounts of glass water into the paste to respectively prepare pastes with different concentrations: 75%, 80%, 85% and 90% concentration;
2) the uniaxial compressive strength of the paste filling test piece with different concentrations is measured and counted, as shown in fig. 4, obviously, the uniaxial compressive strength of the paste filling test piece increases with the age, and the strength of the paste filling material basically reaches a stable state at the age of 28 d;
when the concentration of the paste is between 80 and 85 percent, the uniaxial compressive strength of the paste filling test piece is the maximum after 28 days, and the requirements of mine paste filling and mining can be completely met.
The foregoing illustrates and describes the general principles, principal features, and advantages of the present disclosure. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims.
Claims (4)
1. A goaf controllable paste filling method based on coal-based solid waste is characterized by comprising the following steps:
the method comprises the following steps: preparing coal-based solid waste paste;
step two: reserving a moving space of the filling equipment;
step three: constructing a filling grouting space;
step four: and (3) concentration adjustment: conveying the coal-based solid waste paste in the storage chamber to a working surface, and injecting the coal-based solid waste paste into filling equipment for concentration adjustment; adding a water absorbing material into the coal-based solid waste paste to increase the concentration of the paste;
step five: filling paste: and operating the filling equipment to fill the paste on the working surface.
2. The controllable paste filling method for the goaf based on the coal-based solid waste, as claimed in claim 1, wherein the ground concentration of the paste in the first step is 10% -15%, and the filling concentration in the fifth step is 80% -85%.
3. The coal-based solid waste-based goaf controllable paste filling method according to claim 1, wherein the water absorbing material in step four is glass water.
4. The coal-based solid waste-based goaf controllable paste filling method as claimed in claim 1, wherein in step one, the coal-based solid waste paste comprises fly ash, gasified slag, furnace bottom slag and desulfurized gypsum, wherein the fly ash accounts for 15% -30% of the solid material, the gasified slag accounts for 30% -40%, the furnace bottom slag accounts for 20% -40%, the desulfurized gypsum accounts for 10% -25%, and cement and other additives account for 10% -25%.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414141.XA CN112431631A (en) | 2020-12-03 | 2020-12-03 | Coal-based solid waste-based goaf controllable paste filling method |
| NL2028205A NL2028205B1 (en) | 2020-12-03 | 2021-05-12 | Controllable paste filling method for underground waste space based on coal-based solid waste |
| FR2112844A FR3117107B3 (en) | 2020-12-03 | 2021-12-02 | Void zone controllable paste backfill method based on coal-based solid waste. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414141.XA CN112431631A (en) | 2020-12-03 | 2020-12-03 | Coal-based solid waste-based goaf controllable paste filling method |
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| Publication Number | Publication Date |
|---|---|
| CN112431631A true CN112431631A (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011414141.XA Pending CN112431631A (en) | 2020-12-03 | 2020-12-03 | Coal-based solid waste-based goaf controllable paste filling method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112431631A (en) |
| FR (1) | FR3117107B3 (en) |
| NL (1) | NL2028205B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901261B (en) * | 2021-01-28 | 2022-06-03 | 山西大学 | Coal gangue and fly ash mixed ecological filling method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211916A (en) * | 2011-03-25 | 2011-10-12 | 长安大学 | Paste filling material composition prepared from drift-sand and industrial solid waste |
| CN102230396A (en) * | 2011-05-31 | 2011-11-02 | 大连大学 | Filling method capable of exploring while filling coal mine goaf |
| CN103319123A (en) * | 2013-07-08 | 2013-09-25 | 李凤义 | Fly ash-based cemented filling material and preparation method thereof |
| CN106348713A (en) * | 2016-08-30 | 2017-01-25 | 北京玉锦资源与环境技术研究院（有限合伙） | Cementing filling material for co-processing copper-containing dangerous waste of mine and preparation method of cementing filling material |
| CN107857547A (en) * | 2017-12-05 | 2018-03-30 | 山西工程技术学院 | A kind of red mud sill for goaf filling |
| CN108222938A (en) * | 2018-02-07 | 2018-06-29 | 西安科技大学 | A kind of large-inclination-angle coal bed goaf combination grouting filling recovery method |
| WO2018148838A1 (en) * | 2017-02-17 | 2018-08-23 | Ting Yen Jui | Paste for use in mining processes |
| CN110668739A (en) * | 2018-07-03 | 2020-01-10 | 厦门紫金矿冶技术有限公司 | Tailing cemented filling material and preparation method thereof |
| CN111268992A (en) * | 2020-03-13 | 2020-06-12 | 河北建设勘察研究院有限公司 | Waste desulfurized gypsum-waste fly ash foundation backfill material and preparation method and application thereof |
-
2020
- 2020-12-03 CN CN202011414141.XA patent/CN112431631A/en active Pending
-
2021
- 2021-05-12 NL NL2028205A patent/NL2028205B1/en active
- 2021-12-02 FR FR2112844A patent/FR3117107B3/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211916A (en) * | 2011-03-25 | 2011-10-12 | 长安大学 | Paste filling material composition prepared from drift-sand and industrial solid waste |
| CN102230396A (en) * | 2011-05-31 | 2011-11-02 | 大连大学 | Filling method capable of exploring while filling coal mine goaf |
| CN103319123A (en) * | 2013-07-08 | 2013-09-25 | 李凤义 | Fly ash-based cemented filling material and preparation method thereof |
| CN106348713A (en) * | 2016-08-30 | 2017-01-25 | 北京玉锦资源与环境技术研究院（有限合伙） | Cementing filling material for co-processing copper-containing dangerous waste of mine and preparation method of cementing filling material |
| WO2018148838A1 (en) * | 2017-02-17 | 2018-08-23 | Ting Yen Jui | Paste for use in mining processes |
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Also Published As
| Publication number | Publication date |
|---|---|
| NL2028205A (en) | 2022-07-06 |
| FR3117107A3 (en) | 2022-06-10 |
| FR3117107B3 (en) | 2022-11-18 |
| NL2028205B1 (en) | 2022-09-20 |
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