Solidifying clinker-free stowing mix

FIELD: mining industry.

SUBSTANCE: invention is designed for use in development of minerals with systems involving filling mined-out space with solidifying stowing mix. The latter is composed of broken lime-containing binder in the form of active aluminosilicate material (5.6-33.2%) and fired carbonate rocks (1.0-16.7%), tempering water with phlegmatizer (10.6-27.5%), and filler. Carbonate rocks are fired at 900-1200°C, contain active calcium-magnesium oxides CaO+MgO at least 40% and not more than 9.1% based on the total weight of mix, which are broken to screen residue 0.08 mm not more than 15%. Active aluminosilicate material is fired marl or fired clay, or fired kimberlite ore concentration tails, or granulated blast furnace slag. Tempering water contains phlegmatizer in amounts found from formula [Ph] = (0.005-0.021)*Cr/Cw, where [Ph] amount of water in 1 L tempering water, kg; (0.005-0.021) coefficient taking into account proportion between phlegmatizer and fired carbonate rocks in mix; Cr amount of carbonate rocks in mix, kg; and Cw experimentally found consumption of tempering water with mix, L. When indicated amount of CaO+MgO in mixture is exceeded, CaO and MgO are converted into hydroxides by spraying with water in amount not higher than 20% of the weight of fired carbonate rocks (on conversion to active CaO+MgO). As carbonate rocks, host rocks of kimberlite deposits are used; as filler, sand and/or concentration tails, and/or broken aluminosilicate rock; and, as phlegmatizer, industrial-grade lignosulfonate or superplasticizer.

EFFECT: improved workability of mix and reduced cost.

5 cl, 4 dwg, 3 tbl

 

The invention relates to the mining industry and can be used in underground mining systems with mined-out space hardening filling mixture.

Known curing the mixture in the way bookmarks when descending extraction of minerals by benches that contains components in the following ratio, wt.%: sand and gravel - 68, cement - 10, LDC 1-7, water mixing - 15 (RF patent No. 2069765, E. 21 F 15/00, 1996, bull. No. 33).

A disadvantage of the known mixtures are the high cost of filling operations because of the high cost of cement and significant transportation costs for its delivery.

Known curing the mixture in the method of construction backfill array, including cement, fly ash and mixing water with a temperature of 20-50°With (author's certificate. The USSR №1199954, E. 21 F 15/00, 1995, bull. No. 47).

The disadvantages of the known filling mixture due to the high cost due to the use of its expensive part Portland cement and water heating, and high shrinkage deformations.

Known curing the mixture in the method of construction backfill array comprising an inert filler, water, warmed up to 16-40°and binder in the form of ground granulated slag with the addition of 15-20% by weight of binder quicklime (author's certificate. The USSR №1730471, E. 21 F 15/00, 1992, the Yul. No. 16).

A disadvantage of the known hardening filling mixture are its low technological properties : portability, spreading in the developed space, not enough satisfactory deformation properties - shrinkage and thermal deformation, and high cost due to the need of heat consumption for heating water.

Closest to the technical essence is hardening busslinjerna backfill mixture containing lime-containing binder in the form of active aluminosilicate material and calcined carbonate rocks, mixing water, phlegmatizer - technical lignosulphonate (lsls), filler and sulfadimethoxine breed (see RF patent № 2100615, 27.12.1997).

A disadvantage of the known hardening filling mixture are insufficient fluidity and high temperature deformation (the self-heating temperature reaches 100OS) .

The technical result of the invention is the improvement of technological properties of hardening filling mixtures, reducing the cost.

Achieved technical result of the fact that hardening busslinjerna backfill mixture containing the crushed lime-containing binder in the form of active aluminosilicate material and calcined carbonate rocks, mixing water, phlegmatizer, the aggregate function is fired at 900-1200° With carbonate rocks with the content of the active oxides of calcium and magnesium CaO+MgO in them not less than 40% and not more than 9.1 percent by weight of the specified backfill mix, crushed to the fineness of grind, characterized by the sieve residue of 0.08 mm, not more than 15%, as the active aluminosilicate material burnt marl or calcined clay or calcined tailings kimberlite ores, or granulated blast furnace slag and water mixing contains phlegmatizer in the amount determined by the formula: D=(0,005÷0,021)·CAnd/SIn,

where D is the number of phlegmatizer in 1 l of water mixing, kg,

(0,005÷0,021) - coefficient taking into account the proportion of phlegmatizer and these baked carbonate rocks in the composition of the filling mixture,

WithAnd- consumption of baked carbonate rocks in the composition of the filling mixture, kg,

WithIn- the experimentally determined flow rate of the mixing water in the composition of the filling mixture, l,

the ratio of the components of the filling mixture in the following, wt%:

active specified aluminosilicate material5,6-33,2
these baked carbonate rocks1,0-16,7
water mixing
with the specified amount of fluorescence is matsutaro 10,6-27,5
the placeholderrest

In addition, when exceeding the specified content of active CaO+MgO in the specified mixture was transferred Cao and MgO in the hydroxide spraying water in an amount of not more than 20% by weight of the above calcined carbonate rocks in terms of active CaO+MgO.

In addition, the carbonate rocks are the host rocks of kimberlite deposits.

In addition, as aggregate use sand and/or tailings, and/or crushed silica rock - tuff, and/or diabase rock, and/or carbonate rock.

In addition, as phlegmatizer mixture contains lignosulphonate technical - lsls or superplasticizer C-3 - a polycondensation product of naphthalenesulfonate and formaldehyde and lignosulfonate technical, taken in the ratio of 2:1.

To improve the technological properties backlinking backfill mixes: mobility, transportability, effective flowing property, elimination of shrinkage and thermal strains, as well as reducing the cost of filling mixtures is proposed to use as a lime-containing binder active aluminosilicate materials and calcined carbonate rocks after some training and provided treatment of the mixing water prior to being fed into the process to shift the air traffic management components phlegmatizer, that slows down the process of hydration of the lime-containing binder and provides temperature mode of filling mixture in the period of the regulatory process parameters directly in laying space.

As a material for obtaining a lime-containing binder are encouraged to use active aluminosilicate material containing oxide SiO2and Al2About3in the active form, the activity of which is caused by nature or are obtained in the process of heat treatment - annealing at temperatures that ensure the destruction of clay minerals adsorption and hydration water with the formation of hydroxoaluminates salt of metasilicic acid, easily disintegrating in water alkaline ions on Al2(HE)+2and SiO3-2the reaction is active towards Cao and MgO, and carbonate rocks, annealed at a temperature of 900-1200°With a view to their full decarbonization, i.e. transition of carbonates of Mg and CA oxides Cao and MgO. The content in the calcined carbonate rocks used in the production of bookmarks active Cao and MgO must be at least 40%. This is the most expensive component of the bookmark. Burn carbonate rocks, in which the content of active oxides is less than 40%, and 60% will be inert materials are not economically feasible.

Subtlety p the pier burnt carbonate rocks and aluminosilicate materials should be characterized by sieve residue of 0.08 mm, not more than 15%. Increasing the fineness of more than the proposed limit (sieve residue of 0.08 mm, not more than 15%) is not advisable due to the reduction of mobility backfill mixes. Insufficient grinding reduces the strength of the backfill mixes, as this will decrease the degree of contact of the active lime particles with active particles of aluminosilicate rocks.

To prevent thermal deformation cracking of the hardened filling mixture it is necessary to ensure the dissipation of filling mixtures no more than 100 kJ/kg and limit the degree of self heating backfill mixes from the hydration of calcined carbonate rocks up to 70°With (table 1). For this purpose, the content of the calcined carbonate rocks in terms of CaO+MgO active should be no more than 9.1 percent of the mass of the filling mixture. When exceeding the content of the calcined carbonate rocks in terms of CaO+MgO is active in the composition of the filling mixture, partially translate oxide of CA and Mg in the hydroxide, which has no dissipation, spraying them with water in an amount of not more than 20% by weight of the calcined carbonate rocks in terms of active CaO+MgO. The amount of heat filling mixture is calculated from the expression:

QC=(1050 AndAnd)/γC,

where QC- the dissipation of filling mixture, kJ/kg;

WithAnd- consumption of baked ka is beatnik rocks in the composition of the filling mixture, kg/m3,

A=0,4-1,0 - coefficient taking into account the proportional ratio of active Cao+MgO and sintered carbonate rocks,

γC- bulk filling mixture, kg/m3.

The experimental data (table 1) in this limit heat dissipation backfill mixes eliminated the appearance of curing shrinkage and thermal strains, which is an important technological parameter hardening bookmarks.

To make filling mixture transportable properties - mobility, maximum shear stress, effective flowing property (table 2), to increase the time of dissipation of filling mixture in the set of normative strength (table 3), it is proposed to slow down the hydration process annealed carbonate rocks, accompanied by intense heat and increase, through the use of the mixing water with phlegmatizer. Do not use for mixing backlinking backfill mixture of water without phlegmatizer. The phlegmatizer presents or lignosulfates technical (lsls), or lignosulfonate technical and superplasticizer C-3, taken in the ratio 1:2 respectively. The content of the phlegmatizer in water mixing is set based on the content of the calcined carbonate rocks in the backfill mixture according to the formula:

D(0,005-0,021) And/SIn,

where D is the number of phlegmatizer in 1 l of water mixing, kg,

of 0,005 0,021 - coefficient taking into account the proportion of phlegmatizer and burnt carbonate rocks in the composition of the filling mixture,

WithAnd- consumption of baked carbonate rocks (quicklime) in the composition of the filling mixture, kg,

WithIn- the experimentally determined flow rate of the mixing water in the composition of the filling mixture, l (determined at the stage of preliminary experiments).

The effectiveness of the phlegmatizer above and below this limit as moderator of the process of hydration of the calcined carbonate rocks decreases. With the introduction of phlegmatizer in the claimed limit the process of heat burned carbonate rocks slowed down (Fig 1, 2), which is reflected in the time of dissipation of filling mixture as a whole (figure 3). Specific consumption of phlegmatizer in water mixing is determined depending on the required time for mixing and transportation of backfill mixture (figure 2, 3). Table 3 presents the dynamics of the temperature of the filling mixture on lime-containing binder, been closed by water containing phlegmatizer (calorimetric method).

As a placeholder can be used any material, including waste from mining and processing is proizvodstva, suitable for use in obtaining backfill mixes.

The properties of the filling mixture should provide a sustainable mode of transportation from filling complex to lay the formulation, even laying in the developed space with repeating contours of the ore body and a set of desired strength at the specified time. While governed by the following technological parameters backfill mixes: sediment cone "Strasznie" 9,0-14,0 cm; ultimate shear stress of not more than 200 PA; factor stratification is not more than 1.3; setting not earlier than 2 hours after mixing; the spreading angle of not more than 7; yield less than 2%; the regulatory strength in terms of the mine must ensure that the requirements of 0.5 MPa and above. The upper level is presented by the field development systems in accordance with the strength of the artificial arrays at their outcrops.

The compositions of the backfill mixes, table 4, include the following components, wt%:

td align="left"> the placeholder
active aluminosilicate material5,6-33,2,
fired at 900-1200°With carbonate rocks
with a content of active CaO+MgO is at least 40%1,0-16,7,
water mixing with phlegmatizer10,6-27,5,
the rest of it.

Rational region introduction burnt carbonate rocks in the composition of the filling mixture is 1.0-16.7 per cent. When the content of the calcined carbonate rocks below the mentioned limit is not required self heating backfill mixes in the developed space, the strength of the tabs below 0.5 MPa, i.e. below all regulatory indicators (part 22 in table 4).

Introduction burnt carbonate rocks above the claimed limit leads to deterioration of the rheological performance of filling mixture - the mixture becomes thicker, loss of motion, the maximum shear stress exceeds the allowable rate (>200 PA) without increasing the strength of the filling mixture (composition 25 in table 4).

Active aluminosilicate materials play an important role in ensuring durability and providing the required rheological indices of filling mixture. Fine particles of active aluminosilicate materials, adsorption holding on its surface a considerable amount of water, creating a kind of "lubricant" for all components of the filling mixture, reducing the friction between them. Simultaneously adsorbed water plays the role of "lubrication" between the filling mixture and the wall of the pipeline. Occurs thixotropic effect, reduces the coefficient of wall friction and increase the flowability of filling mixture in the developed space. Adsorption water is held until the cessation of transportation of the mixture and the beginning of the reaction tumors with particles of oxides of magnesium and calcium.

The rational area of introduction of the active aluminosilicate material is 5.6-33,2% of the mass of the filling mixture. When the content is below this limit reduces the strength of the filling mixture. When the maximum allowable indicators burnt carbonate rocks in the composition of the filling mixture reducing the active aluminosilicate rocks below 5.6% of its weight does not provide the strength corresponding to the target (composition 14 in table 4). Exceeding this limit is impractical because it does not increase the strength of the filling mixture (composition 9 in table 4).

Rational mixing water with phlegmatizer in a mixture of 10.6-27,5% by weight of filling mixture. Wastage of water mixing with phlegmatizer negative impact on mobility and uniformity bookmarks (more than normal - appears the water segregation and stratification of the mixture), and on the strength of the filling mixture (composition 26 in table 4). The content of this component is below the proposed limit does not provide maximum mobility filling mixture as below 9.0 cm (32 in table 4).

The role of active aluminosilicate materials can play both on the nature of the active materials (eolit, tuff - compounds 1-14, 19-26, 29, 32-34 in table 4), and activated during the heat treatment of materials (clay - compounds 27 and 30 in table 4; the burnt marl - compounds 15-18 in table 4; calcined tailings - part 31 in table 4, as well as blast-furnace granulated slag composition 28 in table 4).

The temperature of the burning clays, marls and tailings is 700-850°C. When this occurs the complete destruction of the structure of clay minerals contained in the materials, and they are water-soluble compounds, which are reactive towards hydrates and oxides of calcium and magnesium contained in the calcined carbonate rocks.

Enlarged possible schemes preparation of filling mixture presents on figa-B. They are distinguished by the fact that option on figa as the active aluminosilicate materials filling mixture and filler use the same materials, for example tuff rocks. While grinding the active aluminosilicate materials and receipt of the filler is carried out in a single unit - ball mill type MSR h, grinding in the mill is carried out by a wet method. As the liquid medium is water mixing with phlegmatizer burnt carbonate rocks, because immediately after the mill, leaving her pulp is mesh from the active aluminosilicate rocks and mixing water with phlegmatizer is mixed in the mixer, for example WAH 009, with dry powdered calcined carbonate rocks (grinding is performed offline in a ball mill, for example, CM 1456A), containing oxides and hydrates of the oxides of calcium and magnesium in the correct (according to the factor to provide the required heat dissipation bookmarks) ratio.

In a variant on figb grinding the active aluminosilicate rocks and burnt carbonate rocks occurs on the dry method in a ball mill, for example, CM 1456A. Next, ground the product is fed into the continuous mixer, for example, SAT A, where it connects with the aggregates and mixing water with phlegmatizer. From the mixer the finished stowing mixture is directed into the mined-out area.

An example implementation.

The profitability of mining kimberlite pipes "Aikhal underground method is provided only if the cost of filling mixtures no more than 800 rubles per m3. Calculations established that the use of expensive imported Portland cement in the production of filling mixtures does not provide the specified level.

It is proposed to use backlinker filling mixture on the basis of local materials - carbonate rocks and aluminosilicate rocks (tuffs).

As raw materials were recommended to use local deposits of aluminosilicate and carbonate materials with stock carb is more breeds, limestone - Plot No. 52 - 1,4 million3, aluminosilicate materials, tuff - "Backfill" to 3.8 million3.

For flowsheet development in the project underground mine "Aikhal" proposed composition of the filling mixture, wt.%:

annealed at 1100°With carbonate rocks
with a content of active Cao+MgO 60%10,3,
active aluminosilicate rocks are tuffs26,15,
aggregate - tuff39,45,
water mixing with phlegmatizer (LST)24,10.

The number of lsls in 1l of water mixing is:

D=0,018×190/442=0,008 kg/L.

The process parameters are given composition backlinking filling mixture: mobility (cone Strasznie) - 14.5 cm, spreading on the device Attard - 18.0 cm, body weight mixture of 1.84 t/m3, the ultimate shear stress of 60 PA, the compressive strength when cured in conditions adapted to the conditions of the underground mine in 28 days - 5,22 MPa. Within 40 minutes after mixing the mixture were investigated its rheological parameters. Conclusion: transportable properties of the backfill mixture during this time is stored (see table 2).

Stowing mixture is prepared n the surface filling complex of baked calcareous materials (limestone), active aluminosilicate materials (tuff rocks) and mixing water with phlegmatizer, representing the technical lignosulphonate (lsls). Active aluminosilicate material and the filler are prepared in the same machine - ball mill MSR 3600×5000-on-wet method, the role of fluid in the grinding process does water mixing with phlegmatizer. Burnt carbonate rocks are crushed offline, in a ball mill CM A to fineness of grind, characterized by sieve residue of 0.08 mm is not more than 15%. Wet and dry material flow connected in the continuous mixer brand WAH 009. From the mixer the finished stowing mixture is sent to the pipeline, which is transported in a goaf.

The use of the proposed technical solution completely eliminates the consumption for filling operations imported expensive and partly hydratious during the long shipping and storage of Portland cement, and also allows you to provide high technological properties backlinking backfill mixes - transportability, flowability, dimensional stability, regulatory strength.

Table 1

The influence of the content of the calcined carbonate rocks within zakladach the th mixture at a temperature deformation of the backfill array (content of active CaO+MgO in the annealed carbonate rocks 87%)
The content of the calcined carbonate rocks in the composition of the filling mixture, kg/m3/ wt.% in terms of CaO+MgO activeThe temperature of the filling mixture, °The dissipation of filling mass, kJ/kgLinear expansion of the filling mass, mm/m (one day)Thermal cracks
120 /the 5.755,669,6+3,4No
160/7,461,284,2+16,1No
200 /9,170,0of 98.2+29,6No
240/10,977,0112,7+40,4Visually recorded

Table 2

The change in rheological properties of the filling mixture in time
Time after mixing, minRheological parameters
Mobility, cmFluidity, cmThe limiting shear stress, PA
1014,218,067
2013,6of 17.068
30 13,516,872
4013,016,085

Table 3.

Dynamics of change of the temperature of the filling mixture (phlegmatizer - LST:annealed carbonate rocks =0,005:1)
Time after mixing the filling mixture by mixing water with phlegmatizer, hour-minutesThe temperature of the filling mixture, °With, when it burned carbonate rocks, kg/m3
120160200
0-2522,9a 21.526,6
0-3528,726,431,3
0-4030,329,234,8
0-5531,532,140,2
1-1033,234,450,1
1-2533,237,563,0
1-4035,843,067,0
1-5545,650,068,3
2-1050,056,168,7
2-2551,9 to 59.670,0
2-4052,6of 60.570,0
2-5553,561,070,0
3-1054,361,2
3-2555,061,2
3-4055,261,2
3-5555,6
4-1055,2
4-2555,2

1. Hardening busslinjerna backfill mixture containing the crushed lime-containing binder in the form of active aluminosilicate material and calcined carbonate rocks, mixing water, phlegmatizer, filler, characterized in that it contains the burned when 900-1200°With carbonate rocks with the content of the active oxides of calcium and magnesium CaO+MgO in them not less than 40% and not more than 9.1 percent by weight of the specified backfill mix, crushed to the fineness of grind, characterized by the sieve residue of 0.08 mm, not more than 15%, as the active aluminosilicate material burnt marl or baked clay, or burned XB is texts enrichment kimberlite ores, or granulated blast furnace slag and water mixing contains phlegmatizer in the amount determined by the formula

D=(0,005÷0,021)·CAnd/SIn,

where D is the number of phlegmatizer in 1 l of water mixing, kg;

(0,005÷0,021) - coefficient taking into account the proportion of phlegmatizer and these baked carbonate rocks in the stowing mixtures;

WithAnd- consumption of baked carbonate rocks in the composition of the filling mixture, kg;

WithIn- the experimentally determined flow rate of the mixing water in the composition of the filling mixture, l;

the ratio of the components of the filling mixture in the following, wt%:

Active specified aluminosilicate material5,6-33,2
These baked carbonate rocks1,0-16,7
Water mixing with the specified number of phlegmatizer10,6-27,5
The placeholderRest

2. Hardening busslinjerna backfill mixture according to claim 1, characterized in that when exceeding the specified content of active CaO+MgO in the specified mixture was transferred Cao and MgO in the hydroxide spraying water in an amount of not more than 20% by weight of the above calcined carbonate powder is in terms of active CaO+MgO.

3. Hardening busslinjerna backfill mixture according to claim 1, characterized in that the carbonate rocks are the host rocks of kimberlite deposits.

4. Hardening busslinjerna backfill mixture according to claim 1, characterized in that as aggregate use sand and/or tailings, and/or crushed silica rock - tuff, and/or diabase rock, and/or carbonate rock.

5. Hardening busslinjerna backfill mixture according to claim 1, characterized in that as phlegmatizer it contains lignosulfonate technical - lsls or superplasticizer C-3 - a polycondensation product of naphthalenesulfonate and formaldehyde and lignosulfonate technical, taken in the ratio of 2:1.



 

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2 tbl

FIELD: mining industry.

SUBSTANCE: invention is designed for use in development of minerals with systems involving filling mined-out space with solidifying stowing mix. The latter is composed of broken lime-containing binder in the form of active aluminosilicate material (5.6-33.2%) and fired carbonate rocks (1.0-16.7%), tempering water with phlegmatizer (10.6-27.5%), and filler. Carbonate rocks are fired at 900-1200°C, contain active calcium-magnesium oxides CaO+MgO at least 40% and not more than 9.1% based on the total weight of mix, which are broken to screen residue 0.08 mm not more than 15%. Active aluminosilicate material is fired marl or fired clay, or fired kimberlite ore concentration tails, or granulated blast furnace slag. Tempering water contains phlegmatizer in amounts found from formula [Ph] = (0.005-0.021)*Cr/Cw, where [Ph] amount of water in 1 L tempering water, kg; (0.005-0.021) coefficient taking into account proportion between phlegmatizer and fired carbonate rocks in mix; Cr amount of carbonate rocks in mix, kg; and Cw experimentally found consumption of tempering water with mix, L. When indicated amount of CaO+MgO in mixture is exceeded, CaO and MgO are converted into hydroxides by spraying with water in amount not higher than 20% of the weight of fired carbonate rocks (on conversion to active CaO+MgO). As carbonate rocks, host rocks of kimberlite deposits are used; as filler, sand and/or concentration tails, and/or broken aluminosilicate rock; and, as phlegmatizer, industrial-grade lignosulfonate or superplasticizer.

EFFECT: improved workability of mix and reduced cost.

5 cl, 4 dwg, 3 tbl

FIELD: mining and underground building, particularly underground mining.

SUBSTANCE: method involves double-stage mineral deposit development; erecting artificial rock-and-concrete supports of previously cut primary chamber roof rock in at least two adjacent primary chambers; extracting secondary chamber resources; filling space defined by cut rock with hardening material mix. Mines for drilling and/or filling operations performing are arranged in deposit roof over or inside ore pillars of secondary chambers. Primary chamber roof rock is cut by well undercharge method. Hardening material mix is supplied via cross headings located between mine and cavities and/or via undercharged well sections remained after rock cutting operation.

EFFECT: increased safety and economical efficiency due to reduced number of drilling and filling mines or accompanying mineral excavation, possibility to use drilling and filling mines at secondary chamber development stage for ore cutting, venting and roof condition control.

5 cl, 3 dwg

FIELD: mining industry, particularly underground mineral mining with excavated space filling with hardening filling mix.

SUBSTANCE: method involves mixing grinded lime-containing binding agent, mixing water and filler; delivering the filling mix to area to be filled; filling mine space with the filling mix in several layers. The lime-containing binding agent is active silica-alumina material and burnt carbonate rock including at least 40% of active Cao+MgO. Above rock is grinded so that not more than 15% of grinded material remains on sieve having 0.08 orifice dimensions. Amount of the grinded burnt carbonate rock is selected so that active Cao+MgO is not more than 9.1% of filling mix mass. Water consumption for oxide Ca and Mg conversion in hydroxide is not more than 20% of burnt carbonate rock recalculated to active CaO+MgO. Retarder is added in mixing water in amount determined from R=(0.005-0.021)-Cr/Cw, where R is retarder content in 1 l of mixing water, kg; (0.005-0.021) is factor, which considers retarder-burnt carbonate rock ratio in the filling mix; Cr is burnt carbonate rock content in filling mix, kg; Cw is experimentally determined mixing water content in filling mix, l. Mine space filling rate is chosen from hardening time and self-heating degree of filing mass. The filling mix contains active silica-alumina material in amount of 5.6-33.2% by weight, carbonate rock burnt at 900-1200°C and containing active CaO+MgO of not less than 40% in amount of 1.0-16.7%, mixing water with retarder in amount of 10.6-27.5%, remainder is filler.

EFFECT: increased operational safety due to improved quality mine space filling, reduced costs and increased mine intensity.

6 cl, 4 tbl, 5 dwg

Fill mix // 2282724

FIELD: mining, particularly to develop valuable mineral deposits along with goaf filling.

SUBSTANCE: fill mix comprises quick lime, grinded blast furnace slag, filler, industrial lignosulphonate and water. The fill mix additionally comprises trisodiumphosphate. All above components are taken in the following amounts (% by weight): quick lime - 1.61-4.8, grinded blast furnace slag - 10.79-14.4, filler - 60.85-62.14, industrial lignosulphonate - 0.016-0.11, trisodiumphosphate - 0.124-0.35, remainder is water.

EFFECT: increased strength and crack-resistance of fill mix over the full fill body.

2 tbl

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