WO2021046585A1 - Backfilling process and composition - Google Patents
Backfilling process and composition Download PDFInfo
- Publication number
- WO2021046585A1 WO2021046585A1 PCT/ZA2020/050046 ZA2020050046W WO2021046585A1 WO 2021046585 A1 WO2021046585 A1 WO 2021046585A1 ZA 2020050046 W ZA2020050046 W ZA 2020050046W WO 2021046585 A1 WO2021046585 A1 WO 2021046585A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- backfill
- component
- water
- admixture composition
- slurry
- Prior art date
Links
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- 239000002002 slurry Substances 0.000 claims abstract description 38
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Classifications
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- 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
-
- 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
Definitions
- Backfilling in mining applications refers to a process of continuously filling the worked out void behind an advancing face.
- the material used for backfilling may include mine tailings that remain after separation of the valuable fraction of a mineral ore from the uneconomic fraction (gangue). Tailings are typically generated through crushing and grinding operations and may have a high proportion of particles with dimensions of a fraction of a millimeter.
- sealing component will be understood broadly and shall include a substance capable of reducing bleeding of water from a backfill material by a mechanism selected from the group consisting of water-absorption, water- adsorption, gelling, water-binding, water-holding, water-repellence, water-resistance, water reduction, flocculation, and acceleration.
- the backfill admixture composition may comprise components selected from the group consisting of a flocculating component, an adhesion promoting component, and a preservative component.
- the slurry may include a backfill binder.
- the binder may comprise a cementitious binder.
- a process for transporting mine waste residue comprising: generating a pumping mixture by: providing water: providing tailings derived from the mine; providing a backfill admixture composition as described in this specification; and mixing said water, said tailings and said backfill admixture composition; and pumping said pumping mixture through a pipe.
- the water, the tailings and the backfill admixture composition may be provided in first to third predetermined amounts respectively.
- the invention extends to a filling material comprising water, an aggregate, and a backfill admixture composition as described in this specification.
- the aggregate may comprise tailings derived from a mine.
- the filling material may include a backfill binder.
- the invention also provides a process for backfilling.
- the process may involve pumping a slurry to a backfill site or zone such as an underground mine stope and allowing it to set therein.
- the slurry may comprise water. It may comprise an aggregate it may comprise a binder. It may comprise a backfill admixture composition as described in this specification.
- the pumping aiding component may be selected based on its capability to control pumpability and flow of the slurry.
- the flocculating component may include a constituent selected from the group consisting of maleic anhydride copolymer, sodium salt of styrene, polyacrylamide, and poly(methacrylic acid). in exemplary variants of the process and composition, the flocculating component may include polyacrylamide.
- the preservative component may include a constituent selected from the group consisting of bactericides, fungicides, and insecticides.
- the bactericides may be selected from the group consisting of sodium benzoate, polyhalogenated phenols, benzalkonium chloride, and copper compounds.
- the fungicides may be selected from the group consisting of polyhalogenated phenols, copper acetoarsenite, and copper arsenate.
- the insecticides may include an emulsion of Dieldrin.
- the insecticides may include an insecticide for controlling termites.
- the preservative component may be selected based on its capability to control organisms which might otherwise contribute to the degradation of polymer-based emulsions and suspensions within the composition, caused by the presence of organism colonies present on or within the substrate and/or the cured or activated polymers. In use of the backfill admixture composition, the preservative component may extend the useful life of the backfill material.
- the balance of the backfill admixture composition may include an aqueous fluid, typically water. It will be appreciated that the composition water may, in use, be augmented by additional water provided as dilution water and/or seepage water.
- the backfill admixture composition may be formulated to be non-toxic and not exothermic, and to have limited or no reaction either to temperature or climatic conditions.
- the disclosed backfill admixture composition is referred to in the model as “SuperGel 265”.
- bleed or variations such as “bleeding” will be understood to include reference to processes selected from the group consisting of bleeding, exudation, sweating and seepage (typically of an aqueous fluid such as water);
- shotcrete accelerator will be understood to include reference to a curing accelerator formulated and marketed for use as an accelerator for shotcreting applications.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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ZA2019/05828 | 2019-09-04 | ||
ZA201905828 | 2019-09-04 |
Publications (1)
Publication Number | Publication Date |
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WO2021046585A1 true WO2021046585A1 (en) | 2021-03-11 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/ZA2020/050046 WO2021046585A1 (en) | 2019-09-04 | 2020-09-04 | Backfilling process and composition |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT202200012386A1 (en) * | 2022-06-10 | 2023-12-10 | Torino Politecnico | PROCEDURE FOR PREPARING A TWO-COMPONENT MORTAR, CALLED TWO-COMPONENT MORTAR AND USE OF SAID TWO-COMPONENT MORTAR |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5141365A (en) * | 1988-07-14 | 1992-08-25 | Fosroc International Limited | Backfilling in mines |
DE19501100A1 (en) * | 1995-01-16 | 1996-07-18 | Pro Mineral Ges | Setting regulator-contg. gypsum-based binder mixt. |
WO1998049115A1 (en) * | 1997-04-24 | 1998-11-05 | Sungeric International Inc. | High pulp density, fast setting and high early strength backfill method and material |
WO2001064556A1 (en) * | 2000-03-01 | 2001-09-07 | Hersol Manufacturing Laboratories Cc | Method of transporting slimes |
-
2020
- 2020-09-04 WO PCT/ZA2020/050046 patent/WO2021046585A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5141365A (en) * | 1988-07-14 | 1992-08-25 | Fosroc International Limited | Backfilling in mines |
DE19501100A1 (en) * | 1995-01-16 | 1996-07-18 | Pro Mineral Ges | Setting regulator-contg. gypsum-based binder mixt. |
WO1998049115A1 (en) * | 1997-04-24 | 1998-11-05 | Sungeric International Inc. | High pulp density, fast setting and high early strength backfill method and material |
WO2001064556A1 (en) * | 2000-03-01 | 2001-09-07 | Hersol Manufacturing Laboratories Cc | Method of transporting slimes |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT202200012386A1 (en) * | 2022-06-10 | 2023-12-10 | Torino Politecnico | PROCEDURE FOR PREPARING A TWO-COMPONENT MORTAR, CALLED TWO-COMPONENT MORTAR AND USE OF SAID TWO-COMPONENT MORTAR |
WO2023237657A1 (en) * | 2022-06-10 | 2023-12-14 | Politecnico Di Torino | Process for preparing a bicomponent mortar, said bicomponent mortar and use of said bicomponent mortar |
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