Stowage mixture

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented at underground development of mineral deposits with stowing mined space. Stowage mixture contains, wt %: Portland cement or its milled clinker 1.4 - 13.68, milled zeolite rock 0.21-10.4, brine of 20÷105 g/l mineralisation, mainly of sodium chloride at temperature facilitating temperature of stowage mixture not below +15°C 14.9 - 26.96, fluidizing agent 0.01 - 0.3, filler - the rest. The invention is developed in dependant claims of the invention formula.

EFFECT: raised mobility and flowability of stowage mixtures, reduced shrinking at maintaining specified hardness, and reduced costs for nature conserving measures from negative effect of harmful salt saturated wastes of diamond extraction.

4 cl, 3 ex, 2 tbl

 

The invention relates to mining and can be used in underground mining with the mined-out space.

Known stowing mixture (SU 1320459 A1, E21F 15/00, publ. 30.06.1987,, bull. No. 24), including mixed in dry form cement clinker and aggregate-sand, to which add a pre-prepared solution of chloride and sodium sulfate, in the following ratio, wt.%:

cement- 6,55-to 7.59,
the sand- 77,31-79,73,
the sodium sulfate- 0,23-0,32,
sodium chloride- 0,15-0,20,
water- 13,34-14,58.

Mobility is known of the composition of the filling mixture is characterized by a slump Strasznie 10 see

A disadvantage of the known technical solution is low mobility and, as a consequence, the reduced fluidity in the developed space, which excludes the possibility of the formation of filling the array with a full repetition of the contours of spent ore body. Negative factors reduce intensive the industry of mining operations due to the need to eliminate nedozagruzki voids, formed during filling operations. Also known stowing mixture is characterized by low corrosion resistance of the composition in relation to natural mineralized waters or concentrated halogen containing species, due to the fact that products of the cement hardening is the free calcium oxide decomposing under the action of aggressive media, which results in the decomposition processes in the backfill array.

Also known compositions backfill mixtures containing 40-75% clay waste ozokerite raw and 25-60% clay-salt waste processing of potash ores with moisture content of 10-35%. Clay-salt waste processing of potash ores contain not only water-insoluble residue, moisture and salt in the form of chlorides of sodium, potassium, magnesium, with a predominance of sodium chloride, and waste ozokerite raw not only the chlorides of sodium and potassium, and sulfates of calcium and magnesium. The introduction of the filling mixture of fine waste ozokerite raw navigates them part of the brine from clay-salt waste potash ores with the formation of a strong enough connection (SU # 1476158 A1, E21F 15/00, publ. 30.04.1989, bull. No. 16).

When using the known composition are issues of rational use of the subsoil burial by the use for which the Lada goaf substances, attack on nature. But a disadvantage of the known technical solution is low mobility, low spreading in the developed space. Negative factors exclude the possibility of formation of filling the array with a full repetition of the contours of spent ore body, reduce the intensity of mining operations due to the need to eliminate nedozagruzki voids. Also known composition is characterized by low strength, significantly limiting its scope.

Closest to the technical essence and the achieved result is stowing mixture (SU 949210 A1, E21F 15/00, publ. 07.08.1982 year), including: Portland cement, aggregate such as sand, ground chalk, plasticizing additive - sulfide-yeast mash the RRT and water in the following ratio, wt.%:

Portland cement M 400- 14-15,
aggregate-sand- 52-63,
ground chalk- 5-15,
RRT- 0,02-0,04,
water- the rest.

Mobility stowing see the si is characterized by a slump Strasznie 10 see

Known composition is characterized by low corrosion resistance against mineralized waters or halogen and concentrated species, due to the fact that products of the cement hardening is the free calcium oxide decomposing under the action of aggressive media, which leads to destructive processes in the backfill array. The mobility and fluidity of known composition is not sufficient for it to spread filling mixture in the developed space with repeating contours of the ore body. For the safety of underground mining when using the known composition of the filling mixture is required to implement a number of additional technical measures for the elimination of nedozagruzki that reduces the intensity of mining. In addition, when using the known composition does not reduce the cost of environmental activities associated with the elimination of the negative impact on the nature of the brine aquifer is complex and containing halogen species, simultaneously extracted from the bowels in the process of mining on the number of fields.

The aim of the invention is to increase mobility, effective flowing property and corrosion resistance backfill mixes, while ensuring the required normative strength, reducing the cost of environmental measures from egatives aggressive concentrated waste.

This objective is achieved in that the filling mixture containing cement, ground component, a filler, a plasticizer additive and mixing water, as the latter contains having salinity 20÷105 g/l brine, mainly of sodium chloride, with a temperature that ensures the temperature of the filling mixture is not lower than +15°C, as the ground component - milled zeolite breed, as cement is Portland cement or ground Portland cement clinker, in the following ratio of components, wt.%:

Portland cement or ground clinker- 1,4-13,68,
ground zeolite rock- 0,21-10,4,
the specified brine- 14,9-26,96,
plasticizing additiveis 0.01 to 0.3,
the placeholder- the rest.

Moreover, these zeolitic rock and ground Portland cement clinker are characterized by residue on sieve No. 008 2-10%.

And the brine can be represented by a composition of natural brine and water, or halogen rocks and water.

Plasticizing additive can be represented leagues what sulfonato technical, additives "Lignospan B-1", "Lignospan B-2".

The most typical content of major cations and anions in natural brine, metehara-ocherskogo aquifer, g/l: CA+2- 1,5-1,8; Mg+2- 0,70-0,89; (Na++K+) - 37,00-39,16; Cl-- 57,20-59,20; SO4-2- 4,68-5,26; HCO3-- 0,084-0,22. Natural salinity brines varies from 85 to 105 g/L. the temperature of the subterranean brine in the natural environment of the underground aquifer varies from minus 0.5 to minus 1.7°C.

The thickness of halogen species in the host rocks of several kimberlite pipes ~200 m Halogen rocks are natural rock salt NaCl at 94-98%.

Zeolite breed fields", Hangaroo" are 75-95% of clinoptilolite and 5-25% quartz, feldspars, fragments of siliceous rocks, volcanic glass, biotite, clay and other breeds. The chemical composition of zeolite rocks of the Deposit "Hangaroo" includes the following oxides, wt.%: SiO2- 66-68; Fe2O3- 10-12; CaO - 2-4; MgO - 1-2; K2O+Na2O - 3-4. The content of soluble alumina - 7-10%, and soluble silica - 2-3%.

In terms of the high cost of Portland cement is preferred to use are filling mixture on the basis of local zeolitic rocks, significantly reducing the consumption of expensive Portland cement sludge is his ground clinker backfilling operations. In addition, zeolite rocks provide backfill arrays corrosion resistance to aggressive environments, such as natural brines (mineralization from 75 to 105 g/l) or halogen and concentrated the host rocks.

Experiments were carried out, and found that when used for mixing backfill mixtures of water, and brine with a salinity of from 20 to 105 g/l significantly improve the properties of the backfill mixes: achieving high mobility and fluidity of filling mixtures without loss of quality backfill mixes (decrease strength and increase shrinkage). In addition, under the action of brines activated properties of zeolitic rocks. Accommodation brines, which is the strongest electrolyte in the pore space of zeolite rocks contributes to the formation of ties with cement not only the surface layer of particles of zeolite, but also internal. In filling a mixture of activated zeolite breed intensively interact with the cement, and chloride salts contained in the brines, which is accompanied by a set of desired strength. This forms a stable crystal lattice, causing a decrease in the shrinkage of the filling mass. Hardened array is not indifferent to aggressive natural brines and halogen or concentrated together the surrounding rocks, and interacts positively with them. Due to the epitaxy of crystalline growths of zeolite-escolastica bookmarks containing halogen and concentrated species formed dense contact zone "tab - breed", which minimizes the vertical displacement of filling the array as a single element consisting of the set formed by filling arrays.

Obvious and the additional effect of the use of new technical solutions, due to the reduced costs of environmental measures related to the protection of the environment from the harmful effects of simultaneously extracted from the bowels natural brines and containing halogen species, since the latter is partially dumped in the developed space mines as part of the bookmark.

The temperature of the brine should ensure that the temperature of the prepared filling mixture is not lower than +15°C. This requirement is due to the following factors. The temperature of the massif on indigenous diamond deposits in Yakutia varies in depth from minus 2°C to +2°C. the temperature of the subterranean brine in the natural environment of the underground aquifer varies from minus 0.5 to minus 1.7°C. the temperature of the aggregates in the winter can drop to minus 30°C. the Brine before use should be warmed up, because primigenia temperature backfill mixes below +15°C self-heating filling mixture in the developed space is not sufficient to achieve the required normative strength of the backfill array. In particular, numerous thermal calculations and experience diamond mines in Yakutia it is proved that if the initial temperature of solid mixtures below +15°C should increase the consumption of expensive fuel elements (Portland or ground clinker) backfill mixes, depending on the actual temperature of the latter and the planned dates outcrops formed by filling mass (table 1), which is not economically feasible because the cost of fuel components is 60-85% of the cost of filling mixtures.

Table 1
The increase in the fuel consumption of the component (Portland cement or ground clinker) bookmarks depending on their initial temperature
Mix temperature, °CThe amount of the fuel component is additionally introduced into filling mixture, kg/m3under the terms of the achievement of standards of strength, sut
345678-10 11-1516-2021-28 and more
0907060504540302015
5454030302520201510
103025202015151055
15500000000

Ground zeolite rock and ground Portland cement clinker features resultsa residue on sieve No. 008 2-10%, as more coarse grind is accompanied by loss of strength bookmarks based on them (see table 2, compounds No. 9 - ground zeolite rocks with the residue on the sieve 15% and # 10 ground Portland cement clinker with the residue on the sieve 15% in comparison with the composition No. 6 sieve residue No. 008 - 10%). Finer grinding of zeolite rocks or ground Portland cement clinker (1% residue on sieve No. 008) is accompanied by increased needs of the filling mixture in the brine to achieve the required mobility, reduction of the effective flowing property and strength of bookmarks (see table 2, part No. 8 - powdered zeolite with the residue on the sieve No. 008 - 1%, composition No. 7 - ground Portland cement clinker with the residue on the sieve No. 008 - 1% and the composition of the No. 16 sieve residue No. 008 - 2%).

The brine can be represented by a composition of natural brine and water, or halogen rocks and water. In table 2 the compositions of No. 11 and No. 12 prepared on the brine salinity 105 g/l with the use of natural brine and halogen species, which are the host rocks of a number of kimberlite pipes. Properties of the obtained backfill mixes are identical.

The upper limit of salinity of the brine used in the manufacture of compositions for backfill mixes, limited to 105 g/L. If you exceed this limit there is loss of mobility backfill mixes for 0.5 hours, which is unacceptable for us what the conditions ensure transportable properties of backfill mixes and minimize nedozagruzki (see composition No. 27, table 2).

The lower limit of salinity of the used brine is limited to 20 g/l, since the reduction of this limit has a negative impact on the strength of bookmarks and increases shrinkage, see compositions No. 14 (salinity 10 g/l) and No. 13 (salinity of 20 g/l).

When exceeding the claimed content of the brine in the filling mixture (26,96%) increases shrinkage and reduces the strength of bookmarks (see table 2, composition No. 15 - the flow of brine 27,36% compared with composition No. 5 - consumption of brine 26,96%). The lower limit of the content of the brine by 14.9%, see No. 24) is limited by the condition of the poor mobility and effective flowing property of filling mixture (13,5%, see No. 25).

The upper the quantity of Portland cement or ground clinker (13,68%) is limited by the maximum desired strength bookmarks (to 10.1 MPa) based on the worst quality filler - fine sand (part 6). This strength is usually required in the most responsible part of the filling mass mates split drifts treatment benches. The lower the cement content in the inventive mixture of 1.4% (see table 2, composition No. 18) is limited by the condition of obtaining the minimum allowable strength bookmarks in arrays, not obrazuemyh treatment benches - 0.2 MPa. This strength is usually required for the formation of the filling mass, not found emich mine workings.

The upper limit in the inventive composition milled zeolitic rocks (the 10.40%) is limited by the condition of the increasing demand in brine to achieve the desired rheological parameters and, consequently, a slight decrease, not increase the strength of the bookmark with the increasing content of zeolite rocks (see table 2, part No. 16 - positive composition in comparison with the composition No. 17). The reason is that the pure powdered zeolite breed self-binding capacity does not possess. The lower limit of crushed zeolite rocks (0,21%, 18) is made on the condition of ensuring the corrosion resistance of backfill mixtures in relation to aggressive environments, natural brines and halogen species. The corrosion resistance coefficient is the ratio of the strength of the samples bookmarks at the age of 6 months when stored in the flowing brine (e.g., brine, metehara-ocherskogo aquifer) to the strength of the samples bookmarks at the age of 6 months when stored in water. A significant amount of experimental research [2] it is proved that the ratio of the corrosion resistance of structures backfill mixtures comprising zeolite breed is not less than 15% by weight of Portland cement or ground Portland cement clinker, the mixture is 0.81; the ratio of the corrosion resistance of compositions comprising zeolite rocks is at least 30% by weight of Portland cement or ground Portland cement clinker, is 1.11. And the ratio of the corrosion resistance bookmarks Portland cement and without milled zeolitic rocks lower than the claimed compositions - 0,73. Ground zeolite rocks bind to insoluble compounds soluble free calcium oxide formed during the hardening of Portland cement. The minimum amount of binder in the mixture is 1.4%, therefore, the minimum content of zeolitic rocks in the backfill mixture of 0.21%. This composition (No. 18, table 2) meets the other requirements for backfill mixtures - defined rheological and strength parameters and corrosion resistance.

At the dose of plasticizing agents in the composition of the filling mixture more than 0.3% (composition No. 23, table 2) reduced the strength of the bookmarks in comparison with the content of plasticizing agents in the claimed limit (see table 2, composition No. 22). At the dose of plasticizing agents in the composition of the filling mixture less than 0.01% (see table 2, composition No. 19) increases the consumption of brine and decreases the strength of the bookmarks in comparison with the content of the plasticizer in the mixture in the claimed limit (see table 2, composition No. 18). The plasticizer can be used: technical lignosulphonate (LST) - composition No. 4, Lignospan B-1 - composition No. 2, Lignospan B-2 - composition No. 3. Studies show that as plaster carousel supplements may apply and superplasticizers type "C-3". However, the influence of superplasticizer type "C-3" on the properties of backfill mixtures identical to the above additives, and their price is now higher. Marked not possible to recommend a superplasticizer for use in the present economic conditions, their use is not cost-effective.

Examples preparation for backfill mixes.

When receiving backfill mixtures can be used in a variety of fillers, for example: fine-grained sand deposits "Priceline"crushed diabase rock and crushed rock overburden. Fractional composition of aggregates (mm)used are shown in table 2 filling mixtures, wt.%:

a) fine-grained sand, wt.%: (more than 10) - 1,3; (5-10) - 1,0; (2,5-5) - 1,0; (1,25-2,5) - 0,5; (0,63-1,25) - 0,7; (0,315-0,63) - 9,5; (0,14-0,315) - 43,0; (less 0.14) - 43,0;

b) crushed diabase rocks, wt.%: (more than 10) - 5,0; (5-10) - 30,0; (2,5-5) - 7,7; (1,25-2,5) - 5,3; (0,63-1,25) - 5,0; (0,315-0,63) - 6; (0,14-0,315) - 10,6; (0,08- 0,14) - 9,0; (less than 0.08) - 21,4;

C) rock overburden, represented by limestone, dolomite, marl, siltstone and transitional differences between them, crushed and high in strength, wt.%: (more than 10) - 5,0; (5-10) - 10,0; (2,5-5) - 30,0; (0,14-2,5) - 35,0; (less 0.14) - 20,0.

The quality of the aggregate substantially affect the strength of the bookmark. In a series of positive influence on the strength of the bookmark placeholders are positioned after the ith follows: crushed diabase rocks; milled and enriched by the strength of the rock overburden; fine-grained sand deposits "Priceline". However, the complexity of the training and therefore the cost of these placeholders are positioned in the same way that predetermines the possibility of use in the manufacture of filling mixtures of all these fillers. The claimed range of the introduction of the filling ingredients allow the mixture to obtain the desired rheological and strength characteristics of any fill.

1. Zeolite-containing filling mixture on the basis of fine-grained sand.

Crushed zeolite rocks and Portland cement clinker is metered in a predetermined ratio dispensers continuous action and sent to the joint grinding using a dry method in a ball mill. The grinding of the ingredients is up to the fineness of grind, characterized by the residue on the sieve No. 008 - 2-10%. Ready-ground material sent to the silo for temporary storage. In the production process of filling mixture in the first continuous mixer is served fine sand, natural brine and water. Natural natural temperature of the brine from minus 0.5 to minus 1.7°C. the temperature of the natural brine and water must ensure that the temperature of the filling mixture at the outlet of the mixer of not less than +15 degrees. With the aim of gaining the desired temperature of the mixture in the winter brine (a mixture of natural brine and water) is heated to a temperature of +80...+95 degrees (with the aim of increasing its own temperature and thawing of frozen sand). Then sand with brine sent to the second continuous mixer, which dispense powdered zeolite rocks, ground Portland cement clinker of the feed hopper and the solution plasticizing agents (technical lignosulphonate THE 2455-002-00281039-00). In the production process of filling mixture are provided with specified properties: mobility and fluidity (on the device Attard - 19...22 cm). With the lack of effective flowing property and mobility of the mixture in the second mixer add water. The salinity of the brine fed to the filling mixture composition, - 20-105 g/L. Finished stowing the mixture is gravity fed through the pipeline in the mined-out area, where a free flowing contours produced ore body. Data on physical-mechanical indicators backfill mixtures on the basis of fine-grained sand are shown in table 2, the compounds 1-17. Thus formed in the developed space filling array repeats the contours of the ore body, provides intimate contact "filling the array is concentrated breed", corrosion resistance relative to soluble halogen containing species and local underground mineralized waters, which minimizes or completely eliminates work for the elimination of nedozagruzki.

2. Backfill mix, prepared according to the "mill"technology on the basis of crushed rocks.

Ground zeolite rocks dispensers continuous action is directed to the dry grinding method in a ball mill. Grinding is performed to the subtleties, characterized by the residue on the sieve No. 008 2-10%. Further, the material enters the ore mill, engaged in the grinding of materials by the wet method, which simultaneously dispense: Portland M 400, crushed rock, plasticizing additive in the dry state, and crushed halogen species in an amount to provide a salinity of brine from 20 to 105 g/L. the Process of grinding ingredients of filling mixture in the ore ball mill by the wet method is accompanied by a temperature increase of filling mixture under the influence of the energy of destruction of friction materials and ingredients in the grinding unit. As evidenced by the experience of the underground mine "Aikhal", in the manufacture of filling mixtures for "mill" technology at the output of ore mill temperature backfill mix is +15...+25°C. Grinding the ore mill is made up of fineness of grind, characterized by the residue on the sieve No. 008 not more than 75%, the halogen rocks dissolve completely in the water. The composition of the filling mixture provides its mobility and fluidity 19-21 see the Finished stowing the mixture is gravity fed through the pipeline in question developed ransta, where free flow ensures complete filling of manufacture. Data on physical-mechanical indicators of filling mixture, prepared according to the "mill" technology, are shown in table 2, the compounds 18-23. Thus formed filling the array to the contours of the ore body, provides intimate contact "filling the array is concentrated breed and corrosion resistance with respect to soluble halogen containing species and local underground mineralized waters, which minimizes or completely eliminates work for the elimination of nedozagruzki.

3. Production backfill mixes with aggregate base crushed and enriched by the strength of the overburden carbonate composition.

Rock overburden stockpiled in dumps of a number of mining companies, represented by limestone, dolomite, siltstone, marl and transitional differences. Heterogeneous rock overburden sent to bessarabow mill, where they samoistselyatsya wet method in brine with a salinity of from 20 to 105 g/l Brine may consist of natural brine aquifer complex and water or dissolved halogen species. The amount of brine should ensure that the ratio of W:T required for the smooth operation of the autogenous mills. The crushed product healthy lifestyles what is in the machine partial dehydration and further goes into the mixer, where is mixed with shredded using a dry method powdered zeolite rocks, plasticizing additive, Portland. From the continuous mixer is ready for backfill mixture, which is characterized by a given mobility and fluidity, through a pipeline by gravity is directed in the mined-out area where flowing free with the repetition of the contours of the ore body. When solidification is formed filling the array of dials to the desired strength (tensile strength under uniaxial compression) from 0.2 to 8 MPa, including the time of outcrop workings in the sides - not less than 0.7 MPa, and the adjacent roof height benches - from 2 to 8 MPa, depending on the span of exposure and the thickness of the carrier layer. Thus formed filling the array to the contours of the ore body, provides intimate contact "filling the array is concentrated breed and corrosion resistance with respect to soluble halogen containing species and local underground mineralized waters. In General, there were positive factors contribute to an increase in the intensity of mining operations because it eliminates the need for combat Nadzaladevi goaf. Data on physical-mechanical indicators backfill mixes with aggregate base crushed and enriched durable the STI overburden carbonate composition are shown in table 2, compounds 24-27.

A specific example of implementation No. 1. Temperature natural brines, metehara-ocherskogo aquifer - minus 1.7°C. the Temperature of frozen fine sand in the winter minus 30°C. in order to obtain the temperature of the prepared filling mixture of at least +15°C, supplied to the production technology of filling mixtures of brine (a mixture of natural brine and water) is heated in a special container to a temperature of 80°C. the heating Temperature is determined by the design decisions and confirmed by the experience of production backfill mixes on mine "International", as recorded in RTP [1]. The amount received in the manufacture of the filling mixture of brine regulated electric valves and flow meters. The first roller mixer dispensers continuous action is served fine sand. At the same time in the same mixer from the special capacity on the pipeline, equipped with a flow meter, served brine consisting of natural brine, metehara-ocherskogo underground aquifer and water in the ratio 50:50. Frozen sand is dispensed in a roll mixer dispensers continuous action. A mixture of sand and brine from the first roll of the mixer is sent to the second gravitational continuous mixer where it is mixed with powdered Portland CL is ncera, powdered zeolite rocks and mortar plasticizing agents (technical lignosulphonate THE 2455-002-00281039-00). The chemical composition of zeolite rocks includes the following oxides, wt.%: SiO2- 66-68; Fe2O3- 10-12; CaO - 2-4; MgO - 1-2; K2O+Na2O - 3-4. Fineness of grind of ground Portland cement clinker and ground zeolite species is characterized by the residue on the sieve No. 008 - 8%. The number of submitted materials is controlled by dosing continuous action and aged in per hour productivity filling complex 80 m3/H. With insufficient mobility and effective flowing property prepared filling mixture in the second mixer is added optionally a minor amount of water. While the salinity of the brine contained in the filling mixture, 50 g/L. Finished stowing mixture comprises, by weight.%:

ground portlandcement clinker- 5,80,
ground zeolite rock- 2,49,
brine salinity of 50 g/l- 25,41,
plasticizing additives (technical lignosulphonate)- 0,014,
- the rest.

Finished stowing mixture (composition No. 4, table 2) mobility and fluidity 19.5 cm on the device Attard characterized by the spreading angle 1°42", is directed by gravity through a pipeline in production with a slope of soil and roof 3 C, where it is formed carrier (high strength) part of the filling mass, thickness 2.5 m tensile strength under uniaxial compression bookmarks in 28 days - 2,2 MPa. Not less than 6 hours (solidification time is formed by the carrier of the layer) in the production served low-graded backfill mixture produced according to the above technology and includes:

ground Portland cement clinker- 3,83,
ground zeolite rock- 1,50,
brine salinity of 50 g/l- 25,69,
plasticizing additives (technical lignosulphonate)- 0,012,
aggregate (fine sand)- the rest.

The flow of filling mixture (composition No. 1, table 2) mobility and fluidity 19,0 cm on the device Attard syshestvyut to fill production. One day produce an additional supply of filling mixture in the production to fill under the roof framing. The ultimate strength in uniaxial compression of this composition ensures strength when exposed backfill array in Board production after 28 days 0.7 MPa, which corresponds to the regulatory requirements. Thus formed two-layer filling the array to the contours of the ore body that provides tight contact "filling the array is concentrated breed and corrosion resistance with respect to soluble halogen containing species and local underground mineralized waters, which minimizes or completely eliminates work for the elimination of nedozagruzki.

A specific example of implementation No. 2. Ball mill capacity 30 t/h dosing continuous action served on the dry grinding method of zeolite rocks. The chemical composition of zeolite rocks of the Deposit "Hangaroo" includes the following oxides, wt.%: SiO2- 66-68; Fe2O3- 10-12; Cao - 2-4; MgO - 1-2; K2O+Na2O - 3-4. The dry grinding method is to fineness, characterized by the residue on the sieve No. 008 - 5%. Ready-ground material sent to the silo for interim storage. In the preparation process of filling mixture in the ore ball mill, working wet-on-wet method, in the continuous the main mode dosed: ground zeolite rock Portland cement 400 M (grinding in cement plant), plasticizing additive - Lignospan B-2, crushed diabase rocks and crushed halogen species (the latter are a waste of diamond mining), wt.%:

Portland- 6,89,
ground zeolite rock- 2,95,
brine salinity 105 g/l- comprised 17.54,
plasticizing additive (Lignospan B-2)to 0.05,
aggregate (crushed diabase rocks)- the rest.

When this brine with a salinity of 105 g/l consists of dissolved halogen enclosing rocks - diamond mining waste. Halogen species 96% consist of rock salt NaCl, so any additional calculations to ensure the desired salinity of the brine is not required.

In the process all ingredients in ore ball mill is the mixing, grinding and thawing due to the energy of destruction, so filling mixture to have a temperature even in winter not below +15°C. And additional heated separately each isostasy backfill mixtures is not required. Finished stowing mixture (composition No. 20, table 2) mobility and fluidity 20.5 cm on the device Attard and the spreading angle of 1°48" gravity is sent through the pipeline in production with a slope of soil and roof 4 C, where it formed a supporting part (high strength) filling mass, thickness of 1.5 m tensile strength under uniaxial compression at this composition, IPA: 28 days of 4.3. Not less than 6 hours in the production served low-graded backfill mixture, including:

Portland cement M 400- 2,80,
ground zeolite rock- 1,50,
brine with a salinity of 105 g/l- 18,00,
plasticizing additive (Lignospan B-2)- 0,02,
aggregate (crushed diabase rocks)- the rest.

The flow of filling mixture and mobility and fluidity 21,0 cm on the device Attard exercise to fill formulation (composition No. 21, table 2). One day produce DataBlade generate the same structure to fill under the roof framing. The ultimate strength in uniaxial compression this is the composition ensures strength when exposed backfill array in Board production after 28 days 0.7 MPa, that complies with regulatory requirements. Formed in the developed space filling array (two layers) repeats the contours of the ore body, provides intimate contact "filling the array is concentrated breed and corrosion resistance with respect to soluble halogen containing species and local underground mineralized waters, which minimizes or completely eliminates work for the elimination of nedozagruzki.

A specific example of implementation No. 3. Ball mill capacity 30 t/h dosing continuous action is served on the dry grinding method zeolitic rock. The chemical composition of zeolite rocks of the Deposit "Hangaroo" includes the following oxides, wt.%: SiO2- 66-68; Fe2O3- 10-12; Cao - 2-4; MgO - 1-2; K2O+Na2O - 3-4. The dry grinding method is to fineness, characterized by the residue on the sieve No. 008 - 10%. Ready-ground material is fed into the silo for interim storage.

Carbonate rock overburden sent to bessarabow the mill where they are crushed by the wet method in brine salinity 105 g/l of Crushed product directed to the office of partial dehydration and further into the mixer where it is mixed with shredded using a dry method of zeolite breed solution plasticizing agents (Lignopan B1), what portlandcement. Stowing mixture comprises wt.%:

Portland cement M 400- 6,00,
ground zeolite rocks- 2,87,
brine salinity 105 g/l- 14,9,
plasticizing additive (Lignospan B-1)to 0.05,
aggregate (crushed carbonate rock overburden)- the rest.

The ultimate strength in uniaxial compression of this compound in 28 days to 6.2 MPa (composition No. 24, table 2). The flow of filling mixture and mobility and fluidity 19.5 cm on the device Attard and the spreading angle of 2°48" exercise before completing production to a height of 1.0 m (bearing part of the layer). Not less than 6 hours in production podaetsya the second portion of the filling mixture, composition, wt.%:

Portland cement M 400- 1,40,
ground zeolite rocks- 3,70,
brine salinity 105 g/l- the 14.90,
plasticizing additive (ignoran B-1) - 0,010,
aggregate (crushed carbonate rock overburden)- the rest.

One day produce DataBlade production to fill under the roof framing. The ultimate strength in uniaxial compression of this composition ensures strength when exposed backfill array height of 5 m in Board production after 28 days 0.8 MPa (composition No. 26, table 2), which corresponds to the regulatory requirements of filling an array in its curtain parts. Thus formed two-layer filling the array to the contours of the ore body, provides intimate contact "filling the array is concentrated breed and corrosion resistance with respect to soluble halogen containing species and local underground mineralized waters, which minimizes or completely eliminates work for the elimination of nedozagruzki.

Sources of information:

1. The regulation of technological processes in the conduct filling operations at the mine "International". Yakutniproalmaz, 2008.

2. Montanov A.N. The formation of the filling mass in the development of diamond deposits in permafrost. - M.: Mining book, 2005. - S. 597

1. Backfill mixture containing cement, ground component, the filler layer is icarousel additive and mixing water, characterized in that as the latter contains having salinity 20÷105 g/l brine, mainly of sodium chloride, with a temperature that ensures the temperature of the filling mixture is not lower than +15°C, as the ground component - milled zeolite breed, as cement is Portland cement or ground Portland cement clinker in the following ratio of components, wt.%:

Portland cement or ground clinker1,4-13,68
Ground zeolite rock0,21 is 10.4
The specified brine14,9-26,96
Plasticizing additive0.01 to 0.3
The placeholderRest

2. Backfill mixture according to claim 1, characterized in that the said zeolitic rock and ground Portland cement clinker are characterized by residue on sieve No. 008 2-10%.

3. Backfill mixture according to claim 1, characterized in that the brine is represented by the composition of natural brine and water, or halogen rocks and water.

4. Backfill mixture according to claim 1, characterized in that the plasticizing additive may be represented by the technical lignosulphonate the sky, "Lignospan B-1", "Lignospan B-2".



 

Same patents:

FIELD: mining.

SUBSTANCE: shaft pneumatic bridging comprises pneumatic shell, suspension unit, protective jacket, manometric and air-supply hoses, device for filling, control of excessive air pressure and its ejection, mount cord. At the same time pneumatic shell is arranged in the form of soft axisymmetric toroidal shell of rectangular section, inside of which there is sleeve arranged, and along its axis there is pipe mounted in with diametre that is less compared to sleeve. Besides pneumatic shell is separated into two equal parts by means of perforated web, upper end and its side surfaces are coated by loose-fitting meshy web with lap towards working zone of rise heading, upper end is made of synthetic high-module fibre of high strength.

EFFECT: improved operational reliability of shaft pneumatic bridging.

4 dwg

FIELD: mining.

SUBSTANCE: half-open course is arranged along chamber perimetre at the level of drilling crossdrift in interchamber pillars, and wooden lining is arranged in it as protruding with its dead part into stripped area of chamber. In discharge courses there are drain partitions installed, and hydraulic stowage finely dispersed material without binder is supplied through course into stripped chamber to the level of ventilation crossdrift. After drainage of water and setting of stowage massif from preserved half-open course along processed pillars there is a row of vertical and inclined wells drilled for the whole capacity of stowage massif, casing pipes are lowered from the surface of which into wells together with reinforcement rods, which protrude over the level of stowage massif. Afterwards the hardening solution is used to fill the following: at first, through wells - preserved half-open courses, then - the wells themselves, and lastly, upper part of chamber till its ceiling, which forms capping.

EFFECT: reduced consumption of binder.

5 dwg

Goaf stowing method // 2393355

FIELD: mining.

SUBSTANCE: method of goaf stowing during underground development of steeply dipping thick ore bodies involves bottom-upward excavation of inclined ore streaks 5 in horizontal layers up to 8 m wide with the inclination angle equal to angle of dip of ore body starting from the hanging side towards the lying side, ore breaking to the mine goaf of the bed, loading of the broken ore from the mine goaf, installation of insulating bulkheads on the bed flanks and filling of the mine goaf with hydraulic stowing mixture 2. Before the mine goaf is filled with hydraulic stowing mixture 2, there built near exposed surface of the adjacent inclined ore streak 6 is concrete retaining wall 1 with the thickness taken depending on the bed width and the specified strength of wall 1. After the rest part of the mine goaf is filled with hydraulic stowing mixture 2 and water is filtered, injection of hardening - cement-and-sand solution is performed to its upper part to the depth of 100…300 mm for movement of self-propelled machines along the filling surface 4.

EFFECT: invention will allow decreasing the flow rate of hardening stowing mixture owing to the construction of concrete retaining wall and reducing the prime cost of the mine production.

2 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented at coal mines during development edge and steeply pitching beds of coal by hydro-cutting. The procedure consists in exposing extraction field, in dividing it to extraction blocks, in leaving inter-block coal solids, in exposing extraction blocks with ventilation and accumulating crosscuts, in driving load handling slopes, ventilation furnaces and pulp furnaces, in dividing extraction blocks to stories, in driving story extraction drifts, and in mining stories of extraction blocks with a system of story hydro-cutting by passes along strike from story extraction drifts and facilitating rock falling in stripped area. Mining of stories is performed in a descending order. Exposure of extraction field is carried out at flanks with ventilation and accumulating crosscuts wherefrom coal is extracted from solids with the system of extraction; also stripped area is stowed with non-combustible fill; the solid functions as a protection for crosscuts forming a barrier solid. Block mining within ranges of an extraction pillar is performed successively starting from a mining block adjoining the formed barrier solid. Along the whole length of the extracting pillar inter-block coal solids are mined together with stories of adjacent mined extraction blocks.

EFFECT: increased safety of miners labour due to elimination of endogenous fires and increased efficiency owing to extraction of inter-block coal solids.

2 dwg

Stowing mixture // 2386035

FIELD: oil-and-gas production.

SUBSTANCE: stowing mixture contains, wt %: halite wastes of reprocessing of potassic ores 96.5-98.3, bonding agent - magnesia cement 1-2, lignosulfonate 0.7-1.5%.

EFFECT: achievement of required strength of backfilling at minimal content of bonding agent.

1 tbl, 1 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining industry, and namely to the method used for hydraulic filling of long single mine workings. It involves influence of retaining and filtering connection straps, installation of pulp pipeline, and supply of filling pulp. Water is drained via drain holes made in connection straps installed on the side opposite to the pulp supply. Filling pulp is supplied to the filled area via pulp pipeline with the holes made in lower part, which is attached to the roof of mine working throughout its length. The holes made at the beginning of the pipeline are equipped with petal valves.

EFFECT: increases the filling degree of the worked-out area in hard-to-reach sections.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention is related to mining industry, namely to method for preparation of stowing mix. Tails of dressing works are sent to several stowing complexes with application of hydraulic transport system, comprising working and drain branches. Tails are separated in each stowing complex into condensed product sent for preparation of stowing mix and lightened discharge. Working and drain branches of hydraulic transport system are separated. Tails from working branch are sent to each stowing complex, and lightened discharge is drained to drain branch. End part of working branch and beginning of drain branch in hydraulic transport system are joined by emergency bridge comprising stop valves. Each stowing complex newly added to system of hydraulic transport is duplicated with emergency bridge. System of hydraulic transport includes several separated working and drain branches, which service groups of stowing complexes that vary in number. Working and drain branches of hydraulic transport system for sending of tails to several groups of stowing complexes may be combined into headers.

EFFECT: provision of stable high quality of mines stowing, increased efficiency and safety of mining works, lower costs for preparation of stowing mix and transportation of dressing works tails in servicing of several mines.

7 cl, 8 dwg, 1 ex

FIELD: mining.

SUBSTANCE: invention refers to mining engineering and can be used during underground development of mineral deposits. Erection method of filling connection strap involves making of rock dike by laying as to width and height of the filling working of large rock pieces 1, on which there put is layer of finer rock or sand 2 with drain pipe 3 passed through rock dike. On rock dike there installed are pneumocylinders 4, which are forced outwards, between rock dike and roof of working by supplying to pneumocylinders 4 of compressed air with outward pressure which is more than limit value, at decrease of which pneumocylinders 4 are forced with backfill material 5 to the side of non-filled part of the working. Distance between rock dike and roof of working is determined by the ratio: amin<h<0.75amax, where: amin - minimum height of pneumocylinder 4 when in folded position till compressed air is supplied to it; h - distance between rock dike and roof of working; amax - size of pneumocylinder 4 after compressed air has been supplied to it.

EFFECT: increasing efficiency of filling operations.

1 cl, 1 dwg

FIELD: mining.

SUBSTANCE: invention is related to mining industry, namely to hardening fill mixtures. It includes filler, liquid sodium glass, gypsum, cement. Fill mixture is additionally supplemented with flocculant and martite-hematite iron ore, with the following ratio of mixture components: liquid sodium glass 20-22%; cement 1-2%; gypsum 1-2%; flocculant 0.002-0.004%; martite-hematite iron ore 1%; filler - the rest.

EFFECT: improved quality of technological properties of hardening fill mixture, reduced prime cost, increased bearing capacity of filled mass, reduced consumption of hardening solution and simplified technology of stripped area filling.

2 cl, 1 tbl

FIELD: mining.

SUBSTANCE: invention refers to mineral resource industry, namely to methods of protection of workings mainly at great depths and flat gradient of thick deposits in worked-out filling area and may be used during selective mining of thick deposits of highly valuable ore minerals. Method includes formation of secondary local zone of unloading by rock pressure in filling mass of worked-out area by means of balance bags and their filling with flexible material. Balance bags are performed during formation of filling mass in area of next working-out and as a flexible material layer of consolidating stowing is used which flexibility is enhanced as compared to the other layers.

EFFECT: improving of stability of workings formed in consolidating stowing mass.

7 cl, 4 dwg

Heavy concrete // 2393129

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for making concrete and can be used in making wall blocks and panels from the said blocks. The heavy concrete which is made from composite binder, coarse and fine filler and water contains a composite binder additive in form of magnesium silicate ore - wehrlite with the following ratio of components of the binder, in wt %: wehrlite 20, calcium sulphate dihydrate 3, portland cement clinker 77. The coarse filler used is crushed wehrlite and the fine filler used is dunite sand with the following ratio of components, in wt %: composite binder 16.0, dunite sand 34.0, crushed wehrlite 42.0, water 8.0.

EFFECT: increased strength of heavy concrete.

4 tbl, 4 ex

FIELD: construction.

SUBSTANCE: method for preparation of vermiculite heat-insulating composition includes mixing binder - portland cement with additives with dry components of filler - blown-out vermiculite and ground mineral fibre, besides binder is previously mixed with mixing water, then mixed with 25-30% of mixture of dry filler components, and in 20-30 minutes it is mixed with remaining part of dry filler components mix previously heated up to 80-85°C in 5-10 minutes, and produced heat-insulating composition is maintained for 15-20 minutes before application onto protected surface.

EFFECT: increased adhesion of vermiculite heat-insulating coating with protected surface and provision of its integrity in process of operation at exposure to high temperature.

1 cl, 2 tbl

FIELD: construction.

SUBSTANCE: mixture for soil-cement contains clay soil, binder - portland cement, chemical additive - ferment preparation "Dorzin" and water, %: clay soil - 78-83, portland cement - 4-8, "Dorzin" - 0.03-0.06, water - the rest.

EFFECT: increased strength, water resistance and frost resistance.

1 tbl, 1 ex, 1 dwg

FIELD: construction.

SUBSTANCE: invention may be used to make decorative concrete products and structures. Compound for preparation of concrete comprises the following components, wt parts: cement - 1, filler - 2.3-2.7, water - 0.4-0.6 and cyanic sludge of galvanic production that has been previously annealed at the temperature of 880-900°C - 0.05-0.15.

EFFECT: increased strength.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to construction industry and specifically to techniques of preparing compositions for fine-grained concrete mixtures. The mixture for making fine-grained concrete contains the following in kg/m3 of the mixture: portland cement 300-350; screenings from crushing quartzite sandstone with particle size not greater than 0.63 mm 1100-1300; the said mechanically activated quartzite sandstone screenings with specific surface area not less than 700 m2/kg 90-140; water - the rest.

EFFECT: increased strength of hardened cement paste.

1 ex

FIELD: technological processes.

SUBSTANCE: invention relates to industry of construction materials and may be used in production of artificial building stone by pressing method. In method for production of pressed artificial building stone by means of raw mix production by mixing of carbonate rocks crushing siftings - CRCS, Portland cement and water, further pressing at the pressure of 10-15 MPa and hardening in moist medium, CRCS, 15 minutes prior to mixing, is moistened by 1-3%-solution of hydrofluoric acid at the following ratio of components, wt %: Portland cement 20-50, CRCS 50-80, specified solution 12 of CRCS, water - 12 of Portland cement.

EFFECT: improved strength of artificial building stone.

1 tbl

FIELD: construction.

SUBSTANCE: invention can be used namely for ensuring tightness of joints in reinforced concrete tunnel blocks routed in conditions of non-aggressive ground water, as well as for performing waterproofing. Mixture for waterproofing and concreting tunnel linings includes portland cement without any additions with activity of not less than 25.0 MPa in 1 day, expanding sulfoaluminate component- mixture CaO:Al2O3:SO3 at molar ratio (3.1-3.5):(0.9-1.2):(2.2-2.6), fine cellulose fibre with fibres 0.03-1.0 mm long, copolymer of vinyl acetate and vinyl versatate, tartaric acid or its soluble salts and quartz sand with particle size of 0.1-2.5 mm, at the following component ratio, wt %: the above portland cement 45-50, mixture CaO:Al2O3:SO3 2.5-3.5, tartaric acid or its soluble salts 0.010-0.025, copolymer 0.2-0.5, cellulose fibre 0.1-0.2, quartz sand - the rest.

EFFECT: simplifying and reducing the process durability, increasing initial strength of concreting material obtained from mixture, increasing thixotropy of mixture and preventing it from being slipped from ceiling and vertical surfaces, improving its sanitary characteristics.

7 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: material for making inserts to jewellery contains the following, wt %: white portland cement 18-22, crushed wastes from processing mother-of-pearl 78-82 with water-to-cement ratio of 0.6-0.8.

EFFECT: improved machinability of material.

1 tbl

FIELD: construction industry.

SUBSTANCE: invention refers to construction materials, and namely to compositions and method of obtaining concretes and mortars. Mortar contains portland cement, fillers, complex and plasticising additives, tempering liquid. As tempering liquid, there used is structured liquid chosen of the group: fresh juice of new-mown grass, fresh juice of plants, and juice of new-gathered vegetables. Storage life of these materials shall not exceed 3 hours. Treatment method of mortar involves its tempering and laying in a mould.

EFFECT: increasing strength and cold resistance of concretes and mortars.

2 cl, 1 tbl, 2 ex

FIELD: construction engineering.

SUBSTANCE: invention concerns colour lime-sand plaster compositions used for interior finish. The colour lime-sand plaster composition contains, wt %: slaked lime 14-16, Portland cement 14-16, sand quartz 26-34, serpentine and/or malachite process waste 38-42.

EFFECT: improved quality of a plastered surface.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to clay-phosphate material and can be used in production of construction blocks in industrial in civil construction. Clay-phosphate material containing loam, iron-containing wastes of metallurgic production with residue on sieve No 008 7-11 wt %, containing iron (II) oxide 96 wt %, orthophosphoric acid with density 1.24-1.25 g/cm3, foundry wastes with residue on sieve No 008 10-12, containing wt %: SiO2 - 87.45, Al2O3 - 6.00, Fe2O3 - 1.05, FeO - 3.18, CaO - 0.92, MgO - 0.45, TiO2 - 0.12, SO3 - 0.26, K2O - 0.21, Na2O - 0.36, with the following ratio of components, wt %: loam 40-45, said iron-containing wastes - 6-8, said foundry wastes - 30-35, orthophosphoric acid with density 1.24-1.25 g/cm3 - the remaining part.

EFFECT: increase of strength with preservation of water-resistance.

1 tbl

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