CN102691288A - Technique for raising storage content of stockpiled tailing reservoir - Google Patents
Technique for raising storage content of stockpiled tailing reservoir Download PDFInfo
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- CN102691288A CN102691288A CN2012101604141A CN201210160414A CN102691288A CN 102691288 A CN102691288 A CN 102691288A CN 2012101604141 A CN2012101604141 A CN 2012101604141A CN 201210160414 A CN201210160414 A CN 201210160414A CN 102691288 A CN102691288 A CN 102691288A
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Abstract
The invention discloses a technique for raising storage content of stockpiled tailing reservoir, belonging to the mine tailing dam construction technology in the technical field of mining. In the technique, a proper dewatering and densifying construction technology is adopted to drain the water from a stockpiled tailing slurry with high water content, making the tailing slurry dense to become a solid self-supporting tailing soil with low water content, thereby vacating part of the storage capacity. And the subsequent tailing slurry is infused organizedly into different zones and layers to become the solid self-supporting tailing soil, thereby ultimately forming a solid self-supporting tailing stockpiling body with high compactness after constructing the tailing slurry layer by layer till the design height, and expanding storage capacity for the stockpiled tailing reservoir. By using the method, the stockpiled tailing slurry can be rapidly dewatered and densified to vacate bulk storage capacity for the stockpiling of the subsequent tailing slurry. Meanwhile, the tailing slurry can realize solid self-support stockpiling, improving stability, and the lateral force of the tailing slurry to a tailing dam is greatly reduced, raising safety for the tailing dam.
Description
Technical field
The present invention relates to a kind of raising and stored up the process of mine tailing stock reserves, the mill tailings Ba Dui that belongs in the mining technique field builds technology.
Background technology
Tailing dam is a dam formula building of accumulating the mud slag that discharges behind the hydraulic beneficiation, mainly stores up mine tailing mud or other industrial residues of discharging behind the mine ore dressing in the dam body, and very big effect is played in the protection and the improvement of mine environment.The mine tailing that ore dressing is discharged is the bigger thin mud of water content normally, adopts the pump picking device to put to the mine tailing stock through line transportation more.Along with the increasing of fluidised form mud volume of cargo in storage in the mine tailing storehouse, its horizontal force that tailing dam is applied is along with the increase exponentially of height of dam increases, so the tailing dam design height will be restricted, and promptly the capacity in mine tailing storehouse is restricted.After the mine tailing thin mud of depositing in the dam reaches design elevation, just must stop in the dam, to continue to inject mine tailing mud, otherwise will cause overflow dam or dam break, cause catastrophic consequence.
China is mineral products big countries, and a year discharging mine tailing amount has surpassed 1,000,000,000 tons at present, and is still increasing year by year.Be to guarantee the continuation exploitation of ore, behind the full storage capacity in mine tailing storehouse, the newly-built mine tailing of addressing storehouse again just.Yet because land resources is rare, environmental problem is outstanding, and the cost of investment increasing of new mine tailing storehouse is built in addressing, the mine tailing fed distance increases, and huge construction, freight will be born by ore deposit enterprise, cause the serious adverse effect to its development.
Summary of the invention
The present invention proposes the process that the mine tailing storage capacity has been stored up in a kind of raising in order to solve the problem that exists in the prior art, and the technological approaches of effective and safe is provided with cost of production for economizing the land resource.Existing mine tailing storehouse design concept is to regard mine tailing mud and the identical thing of water-based ability, i.e. fluid as basically; Therefore its storage is also the same with the storage of water, need construct dam body and form the mine tailing storehouse.In addition, based on above-mentioned theory, the injection of existing mine tailing mud is random.The mine tailing mud of fluidised form is to the horizontal thrust of storing up degree of depth exponent function relation of dam body generation with mine tailing mud, and this is the key factor that influences the tailing dam stability and safety.
The process of mine tailing stock reserves has been stored up in a kind of raising proposed by the invention; Mainly based on following new concept: mine tailing mud is different from water; Manage the water in the mine tailing mud is got rid of, make mine tailing mud be transformed into the compact earth of supporting oneself of low water content, then can eliminate the horizontal applied force that acts on the tailing dam greatly; And improve the bearing capacity of himself, thereby the unfavorable factor of the dam body stability and safety of eliminating the effects of the act.Simultaneously, because the eliminating of water in the mine tailing mud can be vacateed very big space, and then improve the memory space of mine tailing mud.Afterwards the follow-up injection that newly goes out mine tailing mud is managed; Change existing random injection way; Adopt in order and inject; Distinguish a layer vibration draining through managing burst in a organized way, ted and roll or method such as curing makes it to form the solid-state mine tailing soil that can support oneself, thereby the mode of storing flowable state mud in the storehouse is transformed into the banking system on mound mountain, improve the mine tailing memory space in mine tailing storehouse greatly.
The present invention proposes a kind of ability and improves the process of having stored up mine tailing stock reserves.Its basic skills is: adopt water in the high-moisture mine tailing mud that suitable draining density construction technology will store up to get rid of and make it closely knit, mine tailing mud is transformed into the solid-state self-support mine tailing soil of low water content, thereby vacates part storage capacity; Afterwards the mine tailing mud of follow-up injection is implemented to divide the injection in a organized way of section, layering,, make it also to become the mine tailing soil of solid-state self-support through branch section, layering draining, densification or curing to mine tailing mud.Successively heap is built to design height, finally forms the solid-state self-support tailings impoundment of highly dense solidity body, realizes having stored up the dilatation of mine tailing storehouse.
A kind of basic technical scheme that can improve the process of having stored up mine tailing stock reserves according to the invention is the grain compositions according to the mine tailing mud of storing up in the mine tailing storehouse, divides two kinds of situation to adopt following method:
When mine tailing mud is sand and clay mass percentage content when being not more than 30%, adopt the impact extrusion solid matter water conservancy project skill of shaking to storing up in the mine tailing mud in mine tailing storehouse.Utilize vibrating impacter to produce dither, the sand grains, the powder that are in unstable loose stacking states are sunk under the dither effect, arrange again and form dense packing; Cause sand, separated form water; After water was discharged, macro manifestations was vacateed larger volume storage capacity for the mine tailing mud compacted reality of shaking.To the new mine tailing mud of follow-up injection, then adopt burst to distinguish layer and inject in a organized way, make the new mine tailing mud of follow-up injection form closely knit solid-state self-support through vibration, compacted drainage technology and store up soil.
When mine tailing mud is silt or cohesive soil or sand but clay mass percentage content greater than 30% the time, adopt draining, hit close method construction technology storing up in the mine tailing mud in mine tailing storehouse, comprise vacuum preloading, hit close technology and hit solid matter water conservancy project skill.Vacuum preloading, hit close technology specifically: the vertical drainage passage is set in mine tailing mud; And the transverse drainage passage is set at mine tailing mud surface layer; Cover air-locked diaphragm seal then, use vacuum plant to bleed, make the inside and outside draught head that forms of diaphragm seal through the distributor pipe that has treatment hole; The tailings mud slurry produces discharging consolidation under the diaphragm seal thereby make; And then adopt and to hit decryption method and further promote soil body discharging consolidation, so with vacuum preloading with hit close two procedures multipass circulation, finally reach the effect that mine tailing mud discharging consolidation, volume greatly reduced, vacateed big volume storage capacity.Hitting solid matter water conservancy project skill is that the vertical drainage passage is set in mine tailing mud; And at the certain thickness sand-gravel cushion of mine tailing mud topping laying; Set vertical drainage passage and sand-gravel cushion form continuous drainage channel, adopt multipass to hit that decryption method makes mine tailing mud discharging consolidation, volume greatly reduces and vacate big volume storage capacity.For the new mine tailing mud of follow-up injection, then adopt burst to distinguish layer and inject in a organized way, through tedding, roll or curing process making the mine tailing mud of fluidised form change the mine tailing soil of solid-state self-support into, reach the solid-state requirement of storing up after successively filling.
The invention has the advantages that: this method can promote the rapid draining density of storing up mine tailing mud in the mine tailing storehouse; Can vacate big volume storage capacity and supply storing up of follow-up mine tailing mud; Simultaneously this method can realize that the solid-state self-support of mine tailing mud stores up; Stability strengthens, and reduces the lateral forces of mine tailing mud to tailing dam, the safety that has improved tailing dam simultaneously greatly.
Description of drawings
Fig. 1: the present invention has stored up mine tailing storehouse generalized section in the dilation process of mine tailing storehouse;
Fig. 2: the present invention has stored up mine tailing storehouse floor map in the dilation process of mine tailing storehouse.
Among the figure:
C-solid-state self-support mine tailing basic unit; E-section; F-spacer; G-newly go out mine tailing mud;
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The concrete steps of the process of mine tailing stock reserves have been stored up in a kind of raising of the present invention, are determined by the grain composition of mine tailing mud, describe below in conjunction with Fig. 1 and Fig. 2.
When the mine tailing mud of storing up is sand and clay mass percentage content when being not more than 30%, concrete steps are following:
The first step; The employing impact extrusion solid matter water construction technology of shaking is carried out draining density construction to storing up mine tailing mud; The dither that utilizes vibrating impacter to produce sinks the sand grains, the powder that are in unstable loose stacking states and arranges again, and the liter waterborne in the sand is discharged, and realizes sand, separated form water; The sand particle forms dense packing, reaches the effect of draining density.Select single-point to shake to dash or multiple spot shakes and dashes and the specification of vibrating impacter, power etc. according to the different qualities of sand.After above-mentioned draining density construction,, vacate big volume storage capacity with storing up the solid-state self-support mine tailing c of basic unit that the compacted back of mine tailing mud draining forms highly dense solidity.
Second step; Like Fig. 1 and Fig. 2; On the surface of the solid-state self-support mine tailing c of basic unit, carry out burst distinguish layer in a organized way management newly go out mine tailing mud g, the surface of the solid-state self-support mine tailing c of basic unit is divided into several sections e, the plane sizes of section e with store up day discharge capacity of height and determine by mine tailing mud; Flat shape can be an arbitrary shape, and the volume of each section e is advisable with the mine tailing mud that can store discharging in 1 ~ 3 day; Each section e is separated by spacer f each other; Spacer f height is by the highly decision of storing up of every layer of mine tailing mud; Be slightly larger than the height of storing up of every layer of mine tailing mud; Spacer f can be known technologies such as demarcation strip, template, separation mound, and the intensity of spacer f need satisfy the requirement of bearing newly to go out the lateral forces in the mine tailing mud g injection process.
The 3rd step will newly go out mine tailing mud g and fill with each section e, leave standstill after filling with 1 ~ 3 day; Concrete time of repose is looked the deposition velocity of mud particle and is decided; After treating that the draining of nature deposition is accomplished, adopt the compacted drainage construction technology of vibration to make the further draining of the post-depositional mine tailing mud of nature compacted, utilize repeatedly repeated vibrations mud of vibrating head or plate vibrator; Make the mud draining and the compacted reality of shaking, in each section e, form the solid-state self-support mine tailing soil of highly dense solidity respectively.
In the 4th step, after every layer the compacted completion of mine tailing mud draining, just can remove as the material of spacer f with demarcation strip, template.Can use rolling machine that solid-state self-support mine tailing soil is carried out last vibroroller cmpacting, close every layer the solid-state self-support mine tailing soil of further shaking is stored up with the branch section of the convenient slurry of one deck tailings mud down.So successively solid-state store up mine tailing soil to mine tailing storehouse design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity, realize having stored up the dilatation in mine tailing storehouse.
The close construction technology of the described impact extrusion of shaking comprises the single-point close construction technology of impact extrusion and the multiple spot close construction technology of impact extrusion of shaking of shaking, and the described single-point close construction technology of impact extrusion of shaking adopts a vibrating impacter to the mud close construction of impact extrusion of shaking exactly; The multiple spot close construction technology of impact extrusion of shaking is exactly to adopt vibrating impacter of the same type more than two, same specification to constitute jointly the close construction of impact extrusion of shaking of combination vibrating impacter each other, and multiple spot shakes, and impact extrusion is close breaks through Cheng Zhongke and cause soil resonance shaking, and strengthens compacted effect.Single-point and multiple spot shake the selection of the close construction technology of impact extrusion by the grain composition of sand and clay content decision.When sand is coarse sand, medium sand and fine sand and clay mass percentage content less than 10% the time, can adopt the single-point close technology vibroflotation construction of impact extrusion that shakes compacted with the draining that realizes mine tailing mud; When sand is flour sand, powder fine sand or clay mass percentage content greater than 10% during less than 30% sand, need to adopt the multiple spot close technology of impact extrusion or list, the multiple spot close technology process combined of the impact extrusion vibroflotation construction that shakes that shakes, realize that the draining of mine tailing mud is compacted.
When the mine tailing mud of having stored up is silt or cohesive soil or sand but clay mass percentage content greater than 30% the time, the concrete steps of mine tailing storehouse dilatation are following:
The first step; The vertical drainage passage is set in mine tailing mud; At mud topping laying horizontal drainage passage, each vertical drainage tunnel-shaped of horizontal drainage channel connection becomes drainage system simultaneously, then adopts vacuum preloading to realize discharging consolidation; Be specially: on the mud face, cover air-locked diaphragm seal; Distributor pipe through the band treatment hole uses vacuum plant to be bled in diaphragm seal and the space that mine tailing mud surface layer forms, make diaphragm seal inside and outside form draught head with the water in the mine tailing mud along level and the discharge of vertical drainage passage, finally make after the draining of mine tailing mud fixed.
Simultaneously in the process of vacuum preloading; Selected correct position on mine tailing mud surface layer adopts and hits the consolidation draining that close method further promotes mud, so with vacuum preloading with hit close two procedures multipass circulation; Interact, finally reach good discharging consolidation effect.Described vertical drainage passage adopts known manner such as sand drain or vertical drainage pipe to form; Described horizontal drainage passage adopts known manner formation such as horizontal drain pipe.
If described horizontal drainage passage is through forming at the certain thickness sand-gravel cushion of mine tailing mud topping laying one deck; Sand-gravel cushion is connected with the vertical drainage passage, then directly adopts the method for ramming to ram sand-gravel cushion and makes mine tailing mud discharging consolidation, volume compression and vacate big volume storage capacity.Behind above-mentioned discharging consolidation, stored up the solid-state self-support mine tailing c of basic unit that becomes highly dense solidity behind the mine tailing mud discharging consolidation, as shown in Figure 1, vacate big volume storage capacity.
Second step; On the surface of the solid-state self-support mine tailing c of basic unit, carry out burst distinguish layer in a organized way management newly go out mine tailing mud g: at first the surface with the solid-state self-support mine tailing c of basic unit is divided into several sections e; The plane sizes of section e is determined by mine tailing mud day discharge capacity, the dry speed degree of mine tailing mud draining with storing up height jointly, but the flat shape arbitrary shape; Each section e is separated by spacer f each other; Spacer f height is by the highly decision of storing up of every layer of mine tailing mud; Be slightly larger than the height of storing up of every layer of mine tailing mud; Spacer f can be demarcation strip, template, separation mound etc., and the intensity of spacer f need satisfy the requirement of the lateral forces of the mine tailing mud g that bears newly to go out into notes.
The 3rd step; To newly go out mine tailing mud g and fill with each section e successively; Left standstill after filling with 1 ~ 3 day, concrete time of repose is looked the deposition velocity of mud particle and decide, treat nature deposition draining completion after; Employing teds, compaction technology or curing process make the mine tailing mud of fluidised form change the mine tailing soil of solid-state self-support into, reaches the solid-state requirement of storing up after filling.
Ted, compaction technology is mud to be adopted to turn over repeatedly make it drying after the whole airing and reach the processes well known of carrying out grinding compacting behind the optimum moisture content again, curing process then is to adopt known technology in post-depositional naturally mud, to mix the stir technology of the direct solidified slip in back of an amount of curing compound.For every layer mine tailing mud discharging consolidation or the section e after solidify accomplishing, remove spacer f, roll, descend the section e of the mine tailing mud of one deck to store up simultaneously and proceed.So successively solid-state store up tailings mud to mine tailing design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity.
Describedly hit close method and comprise strong rammer, impact-rolling and three kinds of known technologies of vibroroller cmpacting; Hit the selection of close method according to the supporting capacity of tailing dam, mine tailing mud store up the degree of depth and permeance property determines jointly; If adopt strong ramming technology, the strong position of ramming, ram number and tamping energy and determine by the supporting capacity of mine tailing dam body.
The incorporation of curing compound determines that by newly go out the character index that mine tailing mud g need reach general volume scope is 5 ~ 30% of a mine tailing quality of mud fluid in the said curing process.
A kind of ability that the present invention proposes improves the process of having stored up mine tailing stock reserves; This method can promote the rapid draining density of storing up mine tailing mud in the mine tailing storehouse; Can vacate big volume storage capacity and supply storing up of follow-up mine tailing mud, simultaneously this method can realize that the solid-state self-support of mine tailing mud stores up, and stability strengthens; Reduce simultaneously the lateral forces of mine tailing mud to tailing dam, the safety that has improved tailing dam greatly.
Embodiment one
Certain full storage capacity bauxite gangue storehouse, 120 hectares of storehouse top surface area, tailing dam height of dam 25m, existing mine tailing mud day discharge value is 20,000 m
3, adopt method provided by the invention to increase mine tailing stock reserves.Concrete grammar is following:
This is expired, and mud has been stored up in storage capacity mine tailing storehouse because the time of storing up is shorter, though surperficial Free water drains basically, the average pore of mud is than still up to 1.2; Void ratio is bigger; Density is less, and bearing capacity is less, and mine tailing mud is that medium coarse sand and clay mass percentage content are 5%.Dilatation is carried out by following processing step in this mine tailing storehouse:
1. having stored up mine tailing mud in the mine tailing storehouse is that medium coarse sand and clay mass percentage content are lower than 10%; Adopt the single-point close construction technology of impact extrusion of shaking to carry out draining density construction to storing up mine tailing mud, the vibrating impacter model is that BL-75, power of motor are 75kW, and the dither that utilizes vibrating impacter to produce sinks the sand grains, the powder that are in unstable loose stacking states and arranges again; Liter waterborne in the sand is discharged; Realize sand, separated form water, the sand particle forms dense packing, reaches the effect of draining density.After above-mentioned draining density construction, store up the compacted back of mine tailing mud draining void ratio and dropped to 0.5, form the solid-state self-support mine tailing c of basic unit of higher compactness, vacate nearly 32% memory space.
2. on the surface of the solid-state self-support mine tailing c of basic unit, carry out burst district, layering, management newly goes out mine tailing mud g in a organized way; The surface of the solid-state self-support mine tailing c of basic unit is divided into 20 section e; The plane sizes of each section e is 6 hectares; Storing up is 1m highly, and flat shape is a rectangle, and the volume of each section is the mine tailing mud of storage discharging in 3 days; Each section e is separated as spacer f by slim steel form each other, and the template height is set to 1.1m.
3. will newly go out and leave standstill earlier 1 day after mine tailing mud g fills with section e; After treating that the draining of nature deposition is accomplished, adopt the compacted drainage technology of vibration that the draining of post-depositional naturally mine tailing mud is compacted, utilize the internal vibration rod of model ZX-70, frequency 200Hz repeatedly to shake repeatedly into mud; Make mud sandstone under the vibration force effect sink to piling up; Moisture content separates discharges, and realizes that the mud draining is compacted, finally forms the solid-state self-support mine tailing soil of highly dense solidity.
4. after every layer the compacted completion of mine tailing mud draining; Template pulls up dismounting on the spot; Use rolling machine that solid-state self-support mine tailing soil is carried out last vibroroller cmpacting afterwards, close every layer the solid-state self-support mine tailing soil of further shaking is stored up with the branch section of the convenient slurry of one deck tailings mud down.So successively solid-state store up mine tailing soil to mine tailing design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity, realize mine tailing storehouse dilatation.
Embodiment two
The bauxite gangue storehouse that certain is being stored up, 250 hectares of storehouse top surface area, tailing dam height of dam 30m, existing mine tailing mud day discharge value is 1.5 ten thousand m
3, adopt method provided by the invention to increase mine tailing stock reserves.Concrete grammar is following:
This has been stored up and has held the mine tailing storehouse and belong to and store up the mine tailing storehouse; Mine tailing mud is because also in discharging, so whole mine tailing water content of slurry is very high, the average pore ratio of mud is 1.8; Mine tailing mud can not directly bear construction machinery and personnel operation, and mine tailing mud belongs to cohesive soil.This mine tailing storehouse is undertaken by following processing step:
1. the vertical drainage pipe is set in mine tailing mud; Afterwards at the sand cushion of mud topping laying 40cm; Form the transverse drainage passage, cover air-locked diaphragm seal on it, use vacuum plant to bleed through being embedded in the distributor pipe that has treatment hole in the sand cushion; The inside and outside draught head that forms of diaphragm seal is discharged the water in the mud along drainage channel, finally realize the discharging consolidation of mine tailing mud.Mine tailing mud void ratio is reduced to after 1 after utilizing the vacuum preloading draining, when mud can bear the construction machinery load basically, adopts strong the rammer further to promote the sludge consolidating draining.When vacuum preloading is proceeded; Lay sand cushion in the mine tailing center, ram consolidation draining above that by force, so vacuum preloading and the strong two procedures multipass that rams are circulated with further promotion mud; Interact, finally reach good discharging consolidation effect.Behind above-mentioned discharging consolidation, mine tailing mud void ratio drops to 0.5, has stored up the solid-state self-support mine tailing c of basic unit that becomes highly dense solidity behind the mine tailing mud discharging consolidation, vacates 56% memory space.
2. on the surface of the solid-state self-support mine tailing c of basic unit, carry out burst distinguish layer in a organized way management newly go out mine tailing mud g; The surface of the solid-state self-support mine tailing c of basic unit is divided into 25 section e; The plane sizes of each section e is 10 hectares; Storing up is 0.3m highly, and flat shape is a rectangle, and the volume of each section is the mine tailing mud of storage discharging in 2 days; Each section e separates as spacer f with the plastics demarcation strip each other, and plastics demarcation strip height is set to 0.4m, and intensity need satisfy the effect of mine tailing mud lateral force.
3. will newly go out mine tailing mud g and fill with section e; Left standstill after filling with 2 days; After treating that the draining of nature deposition is accomplished; Utilization teds technology and earlier mud is turned over whole airing repeatedly, after dryness in the sun reaches optimum moisture content, adopts the vibrating roller press to carry out grinding compacting again, and mud finally forms the mine tailing soil of solid-state self-support.After every layer mine tailing mud discharging consolidation is accomplished, the plastics demarcation strip is removed, descend the branch section of the mine tailing mud of one deck to store up simultaneously and proceed.So successively solid-state store up tailings mud to mine tailing design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity.
Embodiment three
Certain full storage capacity iron ore mine storehouse, 80 hectares of storehouse top surface area, tailing dam height of dam 20m, existing mine tailing mud day discharge value is 1.2 ten thousand m
3, adopt method provided by the invention to increase storage capacity.Concrete grammar is following:
This is expired storage capacity mine tailing storehouse and has stored up mud behind the long period unhindered settling; The surface Free water drains; And the average pore of mud ratio is 0.8, and mine tailing mud void ratio is less, density is big, bearing capacity is bigger, and mine tailing mud belongs to fine sand and clay near 20%.This mine tailing storehouse successive is undertaken by following processing step:
1. this mine tailing mud is that fine sand and clay are near 20%; Adopt 3 close technologies of the impact extrusion of shaking to carry out draining density construction to storing up mine tailing mud; Utilize three models to produce dither and cause that mud resonance is arranged the loose soil body again for the vibrating impacter of 30kW for ZCQ-30, power of motor; Realize sand, separated form water, sand particle dense packing reaches the effect of draining density.After above-mentioned draining density construction, store up the compacted back of mine tailing mud draining void ratio and dropped to 0.4, form the solid-state self-support mine tailing c of basic unit of higher compactness, vacate 25% memory space simultaneously.
2. on the surface of the solid-state self-support mine tailing c of basic unit, carry out burst distinguish layer in a organized way management newly go out mine tailing mud g; The surface of the solid-state self-support mine tailing c of basic unit is divided into 11 section e; The plane sizes of each section e is 7.3 hectares; Storing up is 0.5m highly, and flat shape is irregularly shaped, and the volume of each section is the mine tailing mud of storage discharging in 3 days; Each section e builds into mound by basic unit's c tailings mud and separates each other as spacer f, and the mound height is set to 0.6m.
3. will newly go out and leave standstill earlier 2 days after mine tailing mud g fills with section e; After treating that the draining of nature deposition is accomplished; Adopt the compacted drainage technology of vibration that the draining of post-depositional naturally mine tailing mud is compacted, the external vibrator that utilizes frequency 100Hz is repeated vibrations mud repeatedly, makes mud sand, separated form water under the vibration wave effect; Sand is arranged and dense packing again, finally forms the solid-state self-support tailings mud of highly dense solidity.
4. after every layer the compacted completion of mine tailing mud draining, just descend the mine tailing mud burst district management of one deck to store up.So successively solid-state store up tailings mud to mine tailing design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity.
Embodiment four
Certain full storage capacity red mud storehouse, 200 hectares of storehouse top surface area, tailing dam height of dam 20m, existing mine tailing mud day discharge value is 10,000 m
3, adopt method provided by the invention to increase mine tailing stock reserves.Concrete grammar is following:
This expires the full storage capacity mud in storage capacity mine tailing storehouse behind long-time unhindered settling, and the mud void ratio is for being 0.9, and mine tailing red mud mud belongs to silty clay.This mine tailing storehouse successive is undertaken by following processing step:
1. diameter be set be 0.5 vertical sand drain as the vertical drainage passage in mine tailing mud; The sand-gravel cushion of mud topping laying 50cm is as transverse drainage passage UNICOM vertical drainage passage; Adopt hammer ram diameter 1.5m earlier; The rammer machine of tamping energy 1500KNm carries out the first pass hammering to mine tailing mud in the storehouse, rams dot spacing and is controlled at 3m, and every some rammer machine 6 hits; After the first pass hammering is accomplished, adopt hammer ram diameter 1.5m, tamping energy 2500KNm rams machine second time hammering is carried out in 500 * 500 zones, center, mine tailing storehouse, rams dot spacing and is controlled at 2m, and every some rammer machine 5 hits; After accomplishing above-mentioned ram for twice, use model YZ20H-1, the mine tailing soil after 30Hz vibratory roller vibroroller cmpacting is rammed frequently of shaking, through above-mentioned three steps hit solid matter water conservancy project skill, make mine tailing mud discharging consolidation, volume compression, vacate big volume storage capacity.Drop to 0.4 through mine tailing mud air space ratio behind the above-mentioned discharging consolidation, stored up the solid-state self-support mine tailing c of basic unit that becomes highly dense solidity behind the mine tailing mud discharging consolidation, vacate 26% memory space.
2. on the surface of the solid-state self-support mine tailing c of basic unit, carry out burst distinguish layer in a organized way management newly go out mine tailing mud g; The surface of the solid-state self-support mine tailing c of basic unit is divided into 50 section e; The plane sizes of each section e is 4 hectares; Storing up is 0.5m highly, and flat shape is a rectangle, and the volume of each section is the mine tailing mud of storage discharging in 2 days; Each section e separates as spacer f with mound each other, and the mound height is set to 0.5m, and intensity need satisfy the effect of mine tailing mud lateral force.
3. will newly go out mine tailing mud g and fill with the section, leave standstill after filling with 1 day, treat that the draining of nature deposition is accomplished after, adopt curing process with post-depositional naturally mine tailing slurry curing.Utilize lime and flyash as curing compound, the total volume of curing compound uses road-mixed machine that curing compound and mine tailing mud mix is even, until the curing tailings mud of the solid-state self-support of the final formation of mud for 10% of the mine tailing quality of mud fluid that adds.After every layer mine tailing slurry curing is accomplished, can descend the branch section curing of one deck tailings mud slurry to store up.So successively solid-state store up tailings mud to mine tailing design elevation after, can form the solid-state self-support tailings impoundment body of highly dense solidity.
Claims (8)
1. process that mine tailing stock reserves have been stored up in raising is characterized in that: the water in the mine tailing mud of the higher moisture that will store up is got rid of also makes it closely knit, is transformed into the solid-state self-support mine tailing soil than low water content, thereby vacates part storage capacity; Afterwards the mine tailing mud of follow-up injection is implemented to divide the injection of section, layering,, make it also to become the mine tailing soil of solid-state self-support through branch section, layering draining, densification or curing to mine tailing mud; Successively heap is built mine tailing soil to design height, finally forms solid-state self-support tailings impoundment body, realizes having stored up the dilatation of mine tailing storehouse.
2. the process of mine tailing stock reserves has been stored up in a kind of raising according to claim 1; It is characterized in that: when the mine tailing mud of the higher moisture of having stored up is that sand and clay mass percentage content are when being not more than 30%; Adopt the close technology of impact extrusion of shaking to storing up, utilize vibrating impacter to produce dither, the sand grains, the powder that are in unstable loose stacking states are sunk under the dither effect in the mine tailing mud in mine tailing storehouse; Again arrange and form dense packing; After sand, the separated form water water is discharged, the mine tailing mud compacted reality of shaking is vacateed part storage capacity; To the new mine tailing mud of follow-up injection, then adopt burst to distinguish layer and inject, make the new mine tailing mud of follow-up injection form closely knit solid-state self-support through vibration, compacted drainage technology and store up soil.
3. the process of mine tailing stock reserves has been stored up in a kind of raising according to claim 2; It is characterized in that: when sand is coarse sand, medium sand and fine sand and clay mass percentage content less than 10% the time, adopt the single-point close technology vibroflotation construction of impact extrusion that shakes compacted with the draining that realizes mine tailing mud; When sand is flour sand, powder fine sand or clay mass percentage content greater than 10% during less than 30% sand, adopt the multiple spot close technology of impact extrusion or list, the multiple spot close technology process combined of the impact extrusion vibroflotation construction that shakes that shakes, realize that the draining of mine tailing mud is compacted.
4. the process of mine tailing stock reserves has been stored up in a kind of raising according to claim 1; It is characterized in that: when the mine tailing mud of the higher moisture of having stored up is silt or cohesive soil or sand but clay volume content greater than 30% the time; Adopt vacuum preloading and hit close process combination construction and make the original debris storehouse vacate part storage capacity storing up in the mine tailing mud in mine tailing storehouse; Perhaps adopt separately and hit close technology, make the original debris storehouse vacate part storage capacity; For the new mine tailing mud of follow-up injection, then adopt burst to distinguish layer and inject, roll or curing process makes the new mine tailing mud of follow-up injection change the mine tailing soil of solid-state self-support into through tedding, reach the solid-state requirement of storing up after successively filling.
5. the process of mine tailing stock reserves has been stored up in a kind of raising according to claim 4, it is characterized in that: described vacuum preloading is constructed with hitting close process combination, specifically: the vertical drainage passage is set in mine tailing mud; And the transverse drainage passage is set at mine tailing mud surface layer; Cover air-locked diaphragm seal then, use vacuum plant to bleed, make the inside and outside draught head that forms of diaphragm seal through the distributor pipe that has treatment hole; Mine tailing mud produces discharging consolidation in the diaphragm seal thereby make; And then adopt and to hit close technology and further promote soil body discharging consolidation, so with vacuum preloading with hit close technology two procedures multipass circulation, reach mine tailing mud discharging consolidation; Described independent employing is hit close technology and is meant: the vertical drainage passage is set in mine tailing mud, and at mine tailing mud topping laying sand-gravel cushion, adopts multipass to hit close technology and make mine tailing mud discharging consolidation.
6. the process of having stored up mine tailing stock reserves according to claim 2 or 4 described a kind of raisings; It is characterized in that: described burst is distinguished layer and is injected and be meant at first solid-state self-support mine tailing basic unit is divided into some sections; New mine tailing mud injects in each section of first floor successively; After the new mine tailing mud of filling with in all sections all changes the mine tailing soil of solid-state self-support into, on the mine tailing soil of the solid-state self-support of first floor, carry out second layer construction.
7. the process of having stored up mine tailing stock reserves according to claim 2 or 4 described a kind of raisings; It is characterized in that: described burst is distinguished layer and is injected and be meant at first solid-state self-support mine tailing basic unit is divided into some sections; New mine tailing mud injects in each section of first floor successively; After the new mine tailing mud of filling with in each section changes the mine tailing soil of solid-state self-support successively into, on the mine tailing soil of solid-state self-support, carry out second layer construction, form stepped burst and distinguish layer injection form.
8. the process of mine tailing stock reserves has been stored up in a kind of raising according to claim 1; It is characterized in that: after every layer the compacted completion of mine tailing mud draining and forming the mine tailing soil of solid-state self-support, use rolling machine that solid-state self-support mine tailing soil is carried out last vibroroller cmpacting.
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| CN109797732A (en) * | 2018-12-30 | 2019-05-24 | 昆明理工大学 | A kind of tailing vacuum consolidation recovery device and stoping method |
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| CN112573842A (en) * | 2020-12-29 | 2021-03-30 | 中国水利水电第九工程局有限公司 | Method for preparing ingredients for cement production by using limestone mine tailing dolomite |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108915060A (en) * | 2018-07-09 | 2018-11-30 | 北京中岩大地科技股份有限公司 | A kind of dewatering of big scale of construction high-moisture low-permeability waste residue |
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| CN112573842A (en) * | 2020-12-29 | 2021-03-30 | 中国水利水电第九工程局有限公司 | Method for preparing ingredients for cement production by using limestone mine tailing dolomite |
| CN112573842B (en) * | 2020-12-29 | 2022-04-22 | 中国水利水电第九工程局有限公司 | Method for preparing ingredients for cement production by using limestone mine tailing dolomite |
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| CN102691288B (en) | 2015-05-13 |
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