CN108266223A - The method that high-sulfur tailings prepares filling in mine material with Gobi aggregate - Google Patents
The method that high-sulfur tailings prepares filling in mine material with Gobi aggregate Download PDFInfo
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- CN108266223A CN108266223A CN201711350457.5A CN201711350457A CN108266223A CN 108266223 A CN108266223 A CN 108266223A CN 201711350457 A CN201711350457 A CN 201711350457A CN 108266223 A CN108266223 A CN 108266223A
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- tailings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a kind of methods that high-sulfur tailings and Gobi aggregate prepare filling in mine material, include the following steps：Classification processing crude tailings slurry, obtains underflow last mortar；By underflow last mortar deposition dehydrating, tailings is obtained, tailings is dried, obtain dry tailings；Dry tailings with Gobi aggregate is mixed, obtains mixed dry material；Mixed dry material is crushed, screen out first it is broken gather materials with second it is broken gather materials, stored；By first it is broken gather materials, second it is broken gather materials, cementing agent and water, sent by Mixture ratio of backfilling materials into blender, stirring is prepared into casting resin.The present invention solve the problems, such as to need in conventional method tailings storehouse deposit caused by sand pulping it is easily hardened, pulping is difficult；The volume expansion of obturation after filling is avoided, improves the intensity of phase before and after obturation, improves the stability of obturation；Save filling in mine cost；Improve filling quality.
Description
Technical field
The invention belongs to mining filling technique fields, and ore deposit is prepared more particularly to a kind of high-sulfur tailings and Gobi aggregate
The method of mountain casting resin.
Background technology
When mine does not allow surface subsidence or can not build tailing library facilities, formed after underground mining yield ores mined out
Area generally requires to be filled, and the casting resin that underground filling uses is usually the mode of crude tailings and cementing.
At present, it in filling in mine, generally requires and builds that tailings storehouse, rubble storehouse, cement bin, Filling Station workshop etc. are a variety of to be set
It applies, filling system investment is larger, and the construction period is longer.
In the prior art, it when preparing casting resin, is generally adopted by tailings and is first dehydrated pulping in tailings storehouse, be stirred for
Preparation method, but there are the following main problems for this preparation method：1. when mine tailings sulfur-bearing is high, clay content is often
Larger, desilting is easily hardened in a manner that sand pulping is deposited in above-mentioned tailings storehouse, pulping is difficult, lower sand density unevenness, and cleaning tailings storehouse is stranded
It is difficult and dangerous；2. in addition, when tailings sulfur-bearing is high, when grain size is thin, spalling and erosion can occur in filling slurry, cause
Obturation volume expansion, though moreover, obturation early strength increases normally, later strength, which can be begun to decline, to be even disintegrated, and is caused
Filling quality declines, and can not meet mining filling process, cause the raising of various costs.
When at present, using tailing-filled mine, for as above problem, often by cement amount is increased, to reduce high-sulfur
Proportion of the tailings in casting resin, so as to reduce the content of sulphur in casting resin, still, this mode increases cement use
Amount so that filling in mine cost greatly increases.Therefore, seek a kind of preparation of economic, efficient high-sulfur tailings filling in mine material
Method is highly desired to carry out high quality filling.
Invention content
Based on drawbacks described above, the purpose of the present invention is to provide a kind of cement consumption is few, manufacturing cost is low, filling effect is good
High-sulfur tailings and the Gobi aggregate method for preparing filling in mine material, this method solve tailings to deposit the easy plate of sand pulping in tailings storehouse
The problem of knot, pulping are difficult, lower sand density unevenness, and cleaning sand warehouse is difficult and dangerous；Avoid the volume of obturation after filling
Expansion improves the early strength of obturation, it is ensured that later strength, so as to improve the stability of obturation；Save ore deposit
Mountain filling cost, improves filling quality.
To achieve the above object, present invention employs following technical solutions：
According to an aspect of the present invention, high-sulfur tailings provided by the invention prepares the side of filling in mine material with Gobi aggregate
Method, which is characterized in that include the following steps：
Crude tailings slurry is classified, obtains underflow last mortar from factory is selected to send to cyclone by the classification processing of crude tailings slurry
With overflow tail mud, the overflow tail mud is transported back and described selects factory；
The underflow last mortar is sent to sedimentation basin deposition dehydrating, obtains tailings, the tailings is transported by the preparation of dry tailings
It is dried to tailings airing field, obtains dry tailings；
The dry tailings with Gobi aggregate is mixed, obtains mixed dry material by the preparation of mixed dry material；
The broken of mixed dry material, screening and storage, the mixed dry material is crushed, and screen out first it is broken gather materials and
Second it is broken gather materials, wherein, described first it is broken gather materials gather materials for the mixing of the dry tailings and the Gobi aggregate is broken, described second
It is broken gather materials gather materials for the broken of the Gobi aggregate；
The preparation of casting resin, by Mixture ratio of backfilling materials, by described first it is broken gather materials, described second it is broken gather materials, the cementing agent
And water is delivered in blender, stirring is prepared into casting resin.
In the present invention, before the preparation of casting resin, the Mixture ratio of backfilling materials is determined according to following steps, including：First
The experiment Gobi aggregate chosen from the Gobi aggregate and the experiment tailings chosen from the dry tailings are mixed to prepare
Filling aggregate is tested, then the experiment filling aggregate and cementing agent, water with a variety of ratios are mixed and tested, so that it is determined that
Filling aggregate and cementing agent and the Mixture ratio of backfilling materials of water.Wherein, the cementing agent is cement.
Preferably, it prepares experiment filling aggregate and specifically includes following steps：
(1) to the break process of the Gobi aggregate of selection, take selection a certain amount of Gobi aggregate be broken into wholegrain diameter≤
10mm's gathers materials, and specifically, is broken for No.1 experiment Gobi aggregate of the grain size less than 5mm and No. two examinations of grain size 5mm~10mm
Test Gobi aggregate；
(2) preparation of the experiment tailings, by a certain amount of tailings of selection by rolling, sieving is prepared into experiment tail
Sand；
(3) preparation of filling aggregate is tested, the experiment filling aggregate is according to experiment tailings：No.1 tests Gobi aggregate：
No. two experiment Gobi aggregate=4:5:1~5:4:1 weight ratio is mixed to get.
Preferably, when determining the proportioning of the experiment filling aggregate, cementing agent and water, first according to cement-sand ratio (cement with
The weight ratio of filling aggregate) it is made into a variety of batch mixings, then water is added to be configured to the filling slurry of various concentration each described batch mixing, so
Slump experiment and compressive strength test are carried out afterwards, finally select satisfactory Mixture ratio of backfilling materials；
It is highly preferred that can be first 1 according to cement-sand ratio:4、1:6、1:8、1:10、1:12 ratio is made into batch mixing, then will be every
The kind batch mixing adds water to be configured to the filling slurry that concentration can be 70%, 72%, 74%, 76%, 78%, 80% respectively, so
Afterwards, the filling slurry is subjected to slump experiment, the filling slurry is prepared into test block carries out 3d, 7d, 28d uniaxial compressive
Strength test chooses slump between 26~28cm, and intensity test result meets matching for mine filler design requirement
Than being used as Mixture ratio of backfilling materials.
In the classification processing step of crude tailings slurry, crude tailings slurry is classified from factory is selected to be pumped to cyclone, preferably
Ground, cyclone classification boundary are 30 μm, and 30 μm or more of underflow last mortar and the overflow tail mud less than 30 μm, institute are obtained after classification
Overflow tail mud is stated by factory being selected rationally to utilize described in water pump blowback.
In the preparation process of dry tailings, the underflow last mortar is sent to sedimentation basin and carries out deposition dehydrating, obtains tailings,
Preferably, tailings of the moisture content within 20% is obtained, the tailings is transported to tailings airing field dries, and obtains dry tail
Sand, it is preferable that obtain the dry tailings that moisture content is less than 10%；
Further, in the preparation of dry tailings, following steps are specifically included：The underflow tailings of high concentration after classification
Slurry is dehydrated in sedimentation basin natural subsidence, and dehydration to the tailings within moisture content 20% with forklift after sedimentation basin taking-up, is stacked
Dried to tailings airing field, dry to moisture content be less than 10% when, obtain dry tailings, then the dry tailings is transported to dagger-axe
Wall gather materials stockyard storage.
In the preparation process of mixed dry material, the dry tailings and the Gobi aggregate, preferably according to 1:1~1:2 ratio
Example mixing, obtains mixed dry material.
In the broken of mixed dry material, screening and storing step, following steps are specifically included：
By the mixed dry material by loading machine or other modes through spout to oscillating feeder feeding, broken by jaw
It is sent to impact breaker and is crushed by the first belt after broken crusher machine；
Vibrating screen is sent into after broken through the second belt again to be sieved, during screening, Vibration Screen separates grain size more than 10mm
Block, the block is back to impact breaker through third belt and is crushed again,
After broken, obtain grain size≤5mm first it is broken gather materials with the second of grain size 5mm~10mm it is broken gather materials, wherein, it is described
First it is broken gather materials be dry tailing and Gobi aggregate mixing it is broken gather materials, described second it is broken gather materials that be that gobi is broken gather materials, by described
One it is broken gather materials by the 4th belt export to finished bin store, by described second it is broken gather materials to be exported to finished bin by the 5th belt deposit
Storage.
Mixed dry material is combined what broken and vibrating screen sieved by the present invention by jaw crusher and impact breaker
Mode solves the problems, such as that high-sulfur tailings is hardened and cannot be directly used to filling.
In the preparation process of casting resin, specifically include：It is broken by first with forklift according to the Mixture ratio of backfilling materials of experiment gained
Gather materials, second it is broken gather materials, cementing agent and water are added in automatic gauge batch hopper after accurate weighing, first broken is gathered materials and
Two it is broken gather materials be delivered in blender by belt conveyor, cementing agent is transported to by screw(-type) feeder in blender, by water
By the way that in water pump pumps to blender, satisfactory casting resin is prepared into through strong stirring.
During filling, pass through filling borehole self-flowing pastefill to underground goaf.
The present invention is made by sieving the absolutely dry broken filling aggregate to gather materials obtained after matching bucket accurate dosing by automatic gauge
The mode of standby filling slurry so that pulping is efficient and convenient, and Mixture ratio of backfilling materials easily adjusts, and concentration is easy to control.
Advantageous effect：
The method that high-sulfur tailings of the present invention and Gobi aggregate prepare filling in mine material, has that cement consumption is few, manufacturing cost
Low, the advantages of filling effect is good.Casting resin prepared by this method is particularly suitable for the metal mine that tailings sulfur-bearing is high, particle is thin and adopts
Filling mine-out area.
Crude tailings using cyclone are starched and carry out cyclone classification by the present invention, obtain tailings of the particle in OK range, point
Underflow last mortar after grade is dried after deposition dehydrating by flowing to sedimentation basin certainly, is mixed into mix afterwards with Gobi aggregate and do
Material, then the mode of Convergency fracturing screening, avoid the construction in tailings storehouse and rubble storehouse, reduce filling in mine cost of investment, add
Fast filling system construction；Solve tailings in traditional approach need to be deposited in tailings storehouse caused by sand pulping it is easily hardened, pulping is difficult,
The problem of lower sand density unevenness, cleaning sand warehouse is difficult and dangerous；Improve the early strength of obturation, it is ensured that the later stage
Intensity so as to improve the stability of obturation, improves filling quality.
The present invention is filled by sieving the absolutely dry filling aggregate obtained, by automatic gauge with preparation after bucket accurate dosing
The mode of slurry ensure that the preceding later strength of casting resin water retention property, mobility and obturation, improve filling quality；
So that pulping is efficient and convenient, Mixture ratio of backfilling materials easily adjusts, and concentration is easy to control.
Description of the drawings
Fig. 1 is the pulverizing-screening system schematic diagram of mixed dry material in the present invention；
Fig. 2 is the flow chart that high-sulfur tailings of the present invention and Gobi aggregate prepare filling in mine material.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes：
As illustrated in fig. 1 and 2, the present invention provides a kind of method that high-sulfur tailings prepares filling in mine material with Gobi aggregate, should
Method includes the following steps：
Determine Mixture ratio of backfilling materials S100, prepare filling aggregate first, then determine the filling aggregate and cementing agent and
The Mixture ratio of backfilling materials of water；
Crude tailings slurry is classified, obtains underflow tail from factory is selected to send to cyclone by the classification processing S200 of crude tailings slurry
The overflow tail mud is transported back and described factory is selected rationally to utilize by mortar and overflow tail mud；
The underflow last mortar is sent to sedimentation basin deposition dehydrating, obtains tailings by the preparation S300 of dry tailings, by the tail
Sand is transported to the drying of tailings airing field, obtains dry tailings；
The dry tailings with Gobi aggregate is mixed, obtains mixed dry material by the preparation S400 of mixed dry material；
The broken of mixed dry material, screening and storage S500, the mixed dry material are crushed, and screen out the first broken collection
Material and second it is broken gather materials, wherein, described first it is broken gather materials gather materials for the mixing of the dry tailings and the Gobi aggregate is broken, it is described
Second it is broken gather materials gather materials for the broken of the Gobi aggregate；
The preparation S600 of casting resin, by described first it is broken gather materials, described second it is broken gather materials, the cementing agent and water, press
The Mixture ratio of backfilling materials, is delivered in blender, and stirring is prepared into casting resin.
In present embodiment, the Mixture ratio of backfilling materials is determined according to following steps, including：It first will be from the Gobi aggregate
The experiment Gobi aggregate of middle selection and the experiment tailings chosen from the dry tailings are mixed to prepare experiment filling aggregate, then
The experiment filling aggregate and cementing agent, water with a variety of ratios are mixed and tested, so that it is determined that filling aggregate and cementing agent
And the Mixture ratio of backfilling materials of water.
In Mixture ratio of backfilling materials step S100 is determined, experiment filling aggregate is first prepared, specifically includes following steps：
(1) it to the break process of the Gobi aggregate of selection, takes and wholegrain diameter is broken into a certain amount of Gobi aggregate of selection
≤ 10mm's gathers materials, and specifically, is broken for No. two of No.1 experiment Gobi aggregate of the grain size less than 5mm and grain size 5mm~10mm
Test Gobi aggregate；
(2) preparation of the experiment tailings, by a certain amount of tailings of selection by rolling, sieving is prepared into experiment tail
Sand；
(3) preparation of filling aggregate is tested, the experiment filling aggregate is according to experiment tailings：No.1 tests Gobi aggregate：
No. two experiment Gobi aggregate=4:5:1~5:4:1 weight ratio is mixed to get.
Further, in the present embodiment, the cementing agent is cement, determines the filling aggregate, cementing agent and water
It is first 1 according to cement-sand ratio (weight ratio of cement and filling aggregate) during proportioning:4、1:6、1:8、1:10、1:12 ratio is made into
A variety of batch mixings, then by each described batch mixing add water be configured to a concentration of 70%, 72%, 74%, 76%, 78%, 80% filling
Then slurry carries out slump experiment, and the filling slurry is prepared into test block and carries out the examination of 3d, 7d, 28d uniaxial compressive strength
It tests, finally chooses slump between 26~28cm, and intensity test result meets the proportioning of mine filler design requirement.
In the classification processing step S200 of crude tailings slurry, crude tailings slurry is classified from factory is selected to be pumped to cyclone,
Cyclone classification boundary is 30 μm, and 30 μm or more of underflow last mortar and the overflow tail mud less than 30 μm are obtained after classification, described
Overflow tail mud described in water pump blowback by selecting factory rationally to utilize.
In the preparation process S300 of dry tailings, by the underflow last mortar of the high concentration after classification in sedimentation basin natural subsidence
Dehydration by dehydration to the tailings within moisture content 20%, with forklift after sedimentation basin taking-up, is stacked to tailings airing field and is dried in the air
Shine, dry to moisture content be less than 10% when, obtain dry tailings, then the dry tailings is transported to the storage of Gobi aggregate stockyard.
In the preparation process S400 of mixed dry material, the dry tailings and the Gobi aggregate, according to 1:1~1:2 ratio
Example mixing, obtains mixed dry material.
In the broken of mixed dry material, screening and storing step 500, following steps are specifically included：
By the mixed dry material by loading machine or other modes through spout 1 to 2 feeding of oscillating feeder, pass through jaw
It is sent to impact breaker 6 and is crushed by the first belt 4 after crusher 3 is broken；
Vibrating screen 8 is sent into after broken through the second belt 7 again to be sieved, during screening, vibrating screen 8 screens out grain size and is more than
The block is back to impact breaker 6 through third belt 5 and crushed again by the block of 10mm,
After broken, obtain grain size≤5mm first it is broken gather materials with the second of grain size 5mm~10mm it is broken gather materials, wherein, it is described
First it is broken gather materials be dry tailing and Gobi aggregate mixing it is broken gather materials, described second it is broken gather materials that be that gobi is broken gather materials, by described
One it is broken gather materials by the 4th belt 9 export to finished bin store, by described second it is broken gather materials by the 5th belt (not shown) export to
Finished bin 10 stores.
In the preparation process S600 of casting resin, according to experiment gained Mixture ratio of backfilling materials, with forklift by first it is broken gather materials,
Second it is broken gather materials, cementing agent and water are added in automatic gauge batch hopper after accurate weighing, by first it is broken gather materials with it is second broken
Gather materials and be delivered in blender by belt conveyor, cementing agent is transported to by screw(-type) feeder in blender, water is passed through
In water pump pumps to blender, satisfactory casting resin is prepared into through strong stirring.
During filling, the casting resin being prepared is passed through into filling borehole self-flowing pastefill to underground goaf.
The method that the present embodiment prepares filling in mine material, pulping is efficient and convenient, and Mixture ratio of backfilling materials easily adjusts, and concentration is easily-controllable
System；Cement consumption is few, and manufacturing cost is low；Avoid the problem of easily hardened, pulping is difficult；It ensure that obturation early stage and later stage are strong
Degree, improves filling quality.
The preferred embodiment of the present invention is described above in association with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned specific embodiment is only schematical, is not restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, present inventive concept and scope of the claimed protection are not being departed from, can also made very
Multi-form, these all fall within the protection scope of the present invention.
Claims (10)
1. a kind of method that high-sulfur tailings prepares filling in mine material with Gobi aggregate, which is characterized in that include the following steps：
Crude tailings slurry is classified, obtains underflow last mortar from factory is selected to send to cyclone by the classification processing of crude tailings slurry；
The preparation of dry tailings, the underflow last mortar is sent to sedimentation basin deposition dehydrating, obtains tailings, and the tailings is transported to tail
Sand airing field dries, and obtains dry tailings；
The dry tailings with Gobi aggregate is mixed, obtains mixed dry material by the preparation of mixed dry material；
The broken of mixed dry material, screening and storage, the mixed dry material is crushed, and is screened out first and broken gathered materials and second
It is broken to gather materials, wherein, described first it is broken gather materials gather materials for the mixing of dry tailings and Gobi aggregate is broken, described second broken gathers materials for gobi
That gathers materials broken gathers materials；
The preparation of casting resin, by described first it is broken gather materials, described second it is broken gather materials, cementing agent and water, it is defeated by Mixture ratio of backfilling materials
Stirring is sent into blender to be prepared into casting resin.
2. the method as described in claim 1 for preparing filling in mine material, which is characterized in that before the preparation of casting resin, root
The Mixture ratio of backfilling materials is determined according to following steps, including：First by the experiment Gobi aggregate chosen from the Gobi aggregate and
The experiment tailings chosen from the dry tailings is mixed to prepare experiment filling aggregate, then by the experiment filling aggregate and glue
Knot agent, water are tested with the mixing of a variety of ratios, so that it is determined that filling aggregate and cementing agent and the Mixture ratio of backfilling materials of water.
3. the method as claimed in claim 2 for preparing filling in mine material, which is characterized in that determining Mixture ratio of backfilling materials step
In, it prepares the experiment filling aggregate and specifically includes following steps：
To the break process of the Gobi aggregate of selection, the Gobi aggregate of selection is taken to be broken for No.1 experiment dagger-axe of the grain size less than 5mm
No. two experiment Gobi aggregates that wall gathers materials with grain size 5mm~10mm；
The preparation of the experiment tailings, by the tailings of selection by rolling, experiment tailings is made in sieving；
The preparation of filling aggregate is tested, according to experiment tailings：No.1 tests Gobi aggregate：No. two experiment Gobi aggregate=4:5:1
~5:4:1 weight ratio is mixed with the experiment filling aggregate.
4. the method as described in claim 1 for preparing filling in mine material, which is characterized in that determining Mixture ratio of backfilling materials step
In, when determining the proportioning of the experiment filling aggregate, cementing agent and water, first a variety of batch mixings are made into, then will be every according to cement-sand ratio
The kind batch mixing adds water to be configured to the filling slurry of various concentration, then carries out slump experiment and compressive strength test, finally
Select Mixture ratio of backfilling materials.
5. the method as claimed in claim 4 for preparing filling in mine material, which is characterized in that the cement-sand ratio is 1:4、1:6、1:
8、1:10、1:12, a concentration of 70%, 72%, 74%, 76%, 78%, the 80% of the filling slurry.
6. the method as described in claim 1 for preparing filling in mine material, which is characterized in that handle step in the classification of crude tailings slurry
In rapid, the gradational boundary of the cyclone is 30 μm.
7. the method as described in claim 1 for preparing filling in mine material, which is characterized in that in the preparation process of dry tailings,
The underflow last mortar is sent to sedimentation basin and carries out deposition dehydrating, tailings of the moisture content within 20% is obtained, by the tailings
It is transported to tailings airing field to be dried, obtains the dry tailings that moisture content is less than 10%.
8. the method as described in claim 1 for preparing filling in mine material, which is characterized in that in the preparation process of mixed dry material
In, the dry tailings is with the Gobi aggregate according to 1:1~1:2 ratio mixing.
9. the method as described in claim 1 for preparing filling in mine material, which is characterized in that in broken, the screening of mixed dry material
And in storing step, following steps are specifically included：
The mixed dry material is broken through spout to oscillating feeder feeding by jaw crusher and impact breaker
It is broken；
It is sieved after broken through vibrating screen, block of the grain size screened out more than 10mm is back to impact breaker again
It is broken；
After broken, obtain grain size≤5mm first it is broken gather materials with the second of grain size 5mm~10mm it is broken gather materials, wherein, described first
It is broken gather materials be dry tailing and Gobi aggregate mixing it is broken gather materials, described second it is broken gather materials that be that gobi is broken gather materials, it is broken by described first
Gather materials with described second it is broken gather materials export respectively to finished bin store.
10. the method as claimed in claim 2 for preparing filling in mine material, which is characterized in that in the preparation process of casting resin,
According to the Mixture ratio of backfilling materials, by described first it is broken gather materials, described second it is broken gather materials, cementing agent and water are matched by automatic gauge
After hopper weighs, then it is delivered to stirring in blender respectively and prepares casting resin.
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