NL2028205B1 - Controllable paste filling method for underground waste space based on coal-based solid waste - Google Patents
Controllable paste filling method for underground waste space based on coal-based solid waste Download PDFInfo
- Publication number
- NL2028205B1 NL2028205B1 NL2028205A NL2028205A NL2028205B1 NL 2028205 B1 NL2028205 B1 NL 2028205B1 NL 2028205 A NL2028205 A NL 2028205A NL 2028205 A NL2028205 A NL 2028205A NL 2028205 B1 NL2028205 B1 NL 2028205B1
- Authority
- NL
- Netherlands
- Prior art keywords
- paste
- coal
- filling
- solid waste
- concentration
- Prior art date
Links
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 239000002910 solid waste Substances 0.000 title claims abstract description 30
- 239000002699 waste material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000002309 gasification Methods 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims 2
- 238000007792 addition Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000008399 tap water Substances 0.000 claims 1
- 235000020679 tap water Nutrition 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000011358 absorbing material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000011084 recovery 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
- 239000011398 Portland cement Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000013461 design 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
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- 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 present invention discloses a controllable paste filling method for an underground waste space based on coal-based solid waste, and belongs to the field of paste filling for underground waste spaces. The controllable paste filling method for an underground waste 5 space based on coal-based solid waste includes preparing a coal-based paste, reserving a moving space for a filling device, constructing a filling and grouting space, adjusting the concentration and performing paste filling. A traditional paste filling device is upgraded, and secondary processing on a working surface is performed so that the concentration of the filling paste can be manually controlled, and the paste filling operation efficiency is improved, and a 10 coal-based solid waste material is reasonably used, so that not only is the environment protected, but also the performance of the filling material is effectively improved, and strategic support is provided for sustainable development of paste filling in the future.
Description
P100662NL00
BACKGROUND S Technical Field The present invention belongs to the field of paste filling for underground waste spaces, and specifically relates to a controllable paste filling method for an underground waste space based on coal-based solid waste. Related Art Underground waste spaces in mines and coal-based solid waste materials brought about by coal mining are two major disaster sources of mines, and a paste filling technology is an advanced technology which includes compounding of surface waste materials, cementing materials, water and the like to prepare a toothpaste-like slurry for backfilling and sealing of underground waste spaces in mines; the mining and filing costs are greatly reduced by paste filling, and the roof contact performance and integrity of filling bodies are great so that the ground pressure can be effectively controlled, and the safety level of mining activities can be improved. At present, paste filling and mining provide a safe and efficient way for recovery of mineral resources having features such as deep burying and broken roofs, and have unique advantages in terms of technology, economy, environmental protection and safety. However, since the concentration of a paste is uncontrollable in a traditional paste filling process, the paste filling efficiency is affected.
SUMMARY In view of the shortcomings of the prior art, the objective of the present invention is to provide a controllable paste filling method for an underground waste space based on coal- based solid waste, and the problem that the concentration of a filling paste in the prior art 1s uncontrollable is solved. The objective of the present disclosure can be achieved by the following technical solution: a controllable paste filling method for an underground waste space based on coal-based solid waste, comprising the following steps: step one: preparing a coal-based solid waste paste; step two: reserving a moving space for a filling device; step three: constructing a filling and grouting space; step four: adjusting the concentration: transporting the coal-based solid waste paste in a storage chamber to a working surface, and injecting the paste into the filling device for adjusting the concentration; and adding a water-absorbing material into the coal-based solid waste paste to increase the concentration of the paste; and step five: performing paste filling: operating the filling device to perform paste filling on the working surface. Further, the preparation concentration of the paste on the ground in step one should be 5%-15%, and the filling concentration in step five should be 75%-85%. Further, the water-absorbing material in step four is glass water. Further, the coal-based solid waste paste in step one includes, based on solid materials, 15%-30% of fly ash, 30%-40% of gasification slag, 20%-40% of furnace bottom slag, 10%- 25% of desulfurized gypsum and 10%-25% of cement and other additives. Beneficial effects of the present disclosure: the concentration of the filling paste can be controlled, and the paste filling operation efficiency is improved.
BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions in embodiments of the present disclosure or in the related art more clearly, the following briefly describes accompanying drawings required for describing the embodiments or the related art. Apparently, a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts. FIG. 1 is a schematic diagram for implementing a controllable paste filling method for an underground waste space based on coal-based solid waste according to the present invention; FIG. 2 is a side view for implementing a controllable paste filling method for an underground waste space based on coal-based solid waste according to the present invention; FIG. 3 is a schematic diagram of an internal structure of a filling device.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some of the embodiments of the present disclosure rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. A controllable paste filling method for an underground waste space based on coal-based solid waste includes the following steps:
Step one: a coal-based solid waste paste is prepared.
An appropriate coal-based solid waste filling material is selected for preparation on the ground according to properties of rock strata above a mine recovery working surface: the material, Portland cement and coal gangue are mixed and stirred, water is added to prepare a low-concentration paste, and then the paste is transported to a storage chamber in a mine.
The preparation concentration of the paste on the ground needs to be low, so as to facilitate long-distance transportation of the paste.
The following experiments are made for determining the preparation concentration value of the paste on the ground: 1) different concentrations of pastes are prepared on the ground: 5% concentration, 10% concentration, 15% concentration, 20% concentration and 25% concentration; and 2) horizontal conveying distances of different concentrations of pastes under pressurized conveying of a filling pump are measured and counted; and the experimental data are as follows: 3) it can be seen through analysis of the data that when the preparation concentration of the paste on the ground is 10%-15%, the horizontal conveying distance is the highest, and the transportation effect is better.
In the present embodiment, the coal-based solid waste paste includes, based on solid materials, 15%-30% of tly ash, 30%-40% of gasification slag, 20%-40% of furnace bottom slag, 10%-25% of desulfurized gypsum and 10%-25% of cement and other additives.
Step two: a moving space for a filling device is reserved.
In the present embodiment, as shown in FIG. 2, a controllable paste filling apparatus for an underground waste space based on coal-based solid waste includes a hydraulic support 3 and a filling device 6; and an enough moving space in an underground waste space 1 in a rear part is reserved for the filling device 6 by controlling the hydraulic support 3 to advance forward.
Step three: a filling and grouting space is constructed.
As shown in FIG. 1, a flexible film 2 is fixedly connected to the rear surface of the hydraulic support 3 and the flexible film 2 is used to cover the rear surface of the hydraulic support 3. When paste filling is performed on the underground waste space behind the hydraulic support 3, the flexible film 2 can effectively prevent the situation that the paste splashed on the surface of the hydraulic support 3 is difficult to remove.
Step four, the concentration is adjusted.
The coal-based solid waste paste in the storage chamber is transported to the working surface and injected into the filling device for adjusting the concentration; As shown in FIG. 3, the filling device 6 includes an inlet end 9, an outlet end 5, a water absorption storage tank 6-1 and a spiral drill rod 6-2; the water absorption storage tank 6-1 is located in the filling device 6, and a water-absorbing material is stored in the water absorption storage tank 6-1; the coal-based solid waste paste in the storage chamber enters the filling device 6 from the inlet end 9, and the water-absorbing material in the water absorption storage tank 6-1 and the paste are mixed and stirred with the spiral drill rods 6-2 to obtain a certain concentration of paste.
A loading top plate 7 is arranged at the upper end of the water absorption storage box 6- 1 and the loading top plate 7 is used to seal the upper end part of the water absorption storage box 6-1 to avoid the situation that air the water absorption storage box 6-1 and thus the water- absorbing material in the water absorption storage box loses effect. In addition, the water- absorbing material can be injected into the water absorption storage box 6-1 by opening the loading top plate 7.
In the present embodiment, water glass is used as the water-absorbing material to increase the concentration of the paste and improve the filling effect. Of course, the water absorbing material includes but is not limited to water glass, as long as a water absorption effect can be achieved, and the concentration of the paste can be increased.
Step five, paste filling is performed.
The coal-based solid waste paste in the storage chamber is connected to the inlet end 9 of the filling device 6, mixed with the water-absorbing material in the device in accordance with design requirements, and discharged from the outlet end 5 after the concentration of the paste is adjusted.
The lower end of the filling device 6 is provided with walking wheels 8 rolling on the working surface, the filling device 6 is pushed to one end of the working surface and slowly pulled when filling is performed until paste grouting and filling are completed in the entire space, and the device is recycled and used again after the working surface is advanced.
Before paste filling, the concentration of the paste is controlled so as to increase the concentration of the paste, and improve the strength of a paste filling material. The following experiments are made for determining the concentration value of the paste during filling: 1) different amounts of glass water are added into the paste to produce different concentrations of pastes: 75% concentration, 80% concentration, 85% concentration and 90% concentration; 5 2) uniaxial compressive strengths of different concentrations of paste filling test pieces are measured and counted; as shown in FIG. 4, obviously, the uniaxial compressive strengths of the paste filling test pieces are improved with ages; at 28 days of age, the strength of the paste filling material basically reaches a stable state; and when the concentration of the paste is 80%-85%, the uniaxial compressive strength of the paste filling test piece is the highest after 28 days, which can fully meet the paste filling and mining requirements of mines.
The foregoing displays and describes basic principles, main features of the present disclosure and advantages of the present disclosure. A person skilled in the art can understand that the present disclosure is not limited in the foregoing embodiments. Descriptions in the embodiments and this specification only illustrate the principles of the present disclosure. Various modifications and improvements are made in the present disclosure without departing from the spirit and scope of the present disclosure, and these modifications and improvements shall fall within the protection scope of the present disclosure.
Claims (4)
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2028205A NL2028205A (en) | 2022-07-06 |
| NL2028205B1 true NL2028205B1 (en) | 2022-09-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2028205A NL2028205B1 (en) | 2020-12-03 | 2021-05-12 | Controllable paste filling method for underground waste space based on coal-based solid waste |
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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211916B (en) * | 2011-03-25 | 2012-11-14 | 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 |
| CN103319123B (en) * | 2013-07-08 | 2015-01-07 | 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 |
| CA2958381A1 (en) * | 2017-02-17 | 2018-08-17 | Yen-Jui Ting | Paste for use in mining processes |
| 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 |
| CN108222938B (en) * | 2018-02-07 | 2020-01-03 | 西安科技大学 | Combined grouting filling mining method for large-inclination-angle coal seam goaf |
| 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 active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112431631A (en) | 2021-03-02 |
| FR3117107B3 (en) | 2022-11-18 |
| NL2028205A (en) | 2022-07-06 |
| FR3117107A3 (en) | 2022-06-10 |
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