CN102691304A - Method for increasing mine tailing storage reserve based on designed storage capacity - Google Patents
Method for increasing mine tailing storage reserve based on designed storage capacity Download PDFInfo
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- CN102691304A CN102691304A CN2012101602517A CN201210160251A CN102691304A CN 102691304 A CN102691304 A CN 102691304A CN 2012101602517 A CN2012101602517 A CN 2012101602517A CN 201210160251 A CN201210160251 A CN 201210160251A CN 102691304 A CN102691304 A CN 102691304A
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Abstract
The invention discloses a method for increasing mine tailing storage reserve based on the designed storage capacity, which belongs to the field of increasing the storage capacity of a mine tailing storehouse. The method comprises the following steps: firstly, laying a layer of working face on original mine tailing slurry in a mine tailing storehouse, arranging a vertical drainage channel in the working face, and setting a horizontal drainage channel on the working face so as to discharge water in the original mine tailing slurry discharges through the vertical drainage channel and the horizontal drainage channel due to the dead weight of solidified tailing soil or tedded tailing soil subsequently stacked on the mine tailing slurry to turn the slurry into a self-supporting soil body with sufficient strength by drainage solidification; and secondly solidifying or tedding tailing slurry subsequently injected to turn the slurry into self-supporting tailing soil with sufficient strength and then stacking the tailing soil on the working face in layers till the final stacking height is achieved.
Description
Technical field
The invention belongs to the mining technique field, relate to dilatation field, mill tailings storehouse, be meant that specifically a kind of increase has reached the method for the mine tailing stock reserves of design storage capacity.
Background technology
Remaining a large amount of ore chips and powder are referred to as mine tailing behind the effective component extracting from ore, and the disposal of mine tailing normally is mixed and made into very rare mine tailing mud with these mine tailings and a large amount of water, then deposits to the appointed place through line transportation with pump.For depositing these fluidised form mud, need build a dam usually (being referred to as tailing dam) leaks to stop mud, forms the mine tailing storehouse.Because the mud of fluidised form can produce very big horizontal applied force to dam body, and this active force increases with the increase exponent function relation of height of dam, so the height of tailing dam will be restricted, and promptly the volume in mine tailing storehouse can be restricted.After the mine tailing mud of depositing in the mine tailing storehouse reaches design elevation, just must stop in the mine tailing storehouse, to continue to inject mine tailing mud, otherwise will cause overflow dam or dam break, thereby bring environment pollution or even life and property loss around giving.
In order to guarantee that ore extraction can proceed, just need to build new mine tailing storehouse.Yet because land resources is rare, mine tailing storehouse floor space is big, and therefore the investment of newly-built mine tailing storehouse is huge, and newly-built tailing dam usually can be away from the ore production base, thereby has increased substantially the conveying cost of mine tailing mud.
Summary of the invention
The present invention proposes a kind of method that can make the mine tailing storehouse that has reached design storage capacity increase the mine tailing memory space, can economize the land resource and cost of production.Its basic thought is that the mine tailing mud with fluidised form is transformed into the solid-state mine tailing that can support oneself soil, thereby significantly reduces mine tailing to the horizontal applied force of dam body in mine tailing the storehouse in, and improves the supporting capacity of himself, reaches the purpose of the capacity in raising mine tailing storehouse.Basic technical scheme is: for the mine tailing mud of new injection, pass through suitable cured or ted processing, make it to become the mine tailing soil body that can support oneself, Jiang Qidui builds existing mine tailing mud surface in the mine tailing storehouse.For original mine tailing mud in the mine tailing storehouse; The vertical drainage passage is set therein, at an upper portion thereof the horizontal drainage passage is set; Constitute the drainage system of a connection, under the action of gravity of the newly-increased mine tailing soil body, the moisture of this part mine tailing mud is discharged through drainage system; Realize discharging consolidation, make its mud transform into the hard soil body that to support oneself from fluidised form.This has weakened the horizontal applied force that original mine tailing mud acts on the original debris dam on the one hand, can bear the pressure that the mine tailing soil body that top increases newly produces on the other hand.
Increase provided by the invention has reached the method for the mine tailing stock reserves of design storage capacity, at first original mining tailing wasteland territory is divided into more than one mining tailing wasteland territory, then dilatation is carried out in each zone, and concrete grammar is following:
The first step is laid one deck work plane on the mine tailing mud surface in mining tailing wasteland territory.
Preferably, before laying work plane, lay one deck separation layer on the surface of mine tailing mud earlier, on separation layer, lay work plane then.
Second step was provided with the vertical drainage passage, and at the work plane upper surface horizontal drainage passage is set in the mine tailing mud in mining tailing wasteland territory, described vertical drainage passage and horizontal drainage channel connection collect in the pumped well place at last, and are communicated with pumped well; The external suction pump of described pumped well.
The 3rd step, on work plane, construct more than one storehouse lattice, the volume of said storehouse lattice can be stored the mine tailing mud of discharging in 1～3 day.
The 4th step, around the mining tailing wasteland territory, build template, the template height is identical with storehouse lattice height.
The 5th step, the mine tailing mud of follow-up injection is filled with the storehouse lattice successively, deposit and through the mud draw-out device mine tailing mud of post-depositional suitable moisture content is pumped to mud and curing compound mixing arrangement after 1 ~ 3 day.Look weather condition and the requirement of strength decision that heap is built the soil body is adopted cured or tedded processing it.For the mine tailing mud that adopts cured; Mine tailing mud mixes with curing compound in mud and curing compound mixing arrangement and stirs; Form and solidify mine tailing soil; Then will solidify mine tailing soil through transport and be delivered to paving system, the addition of described curing compound is preferably 3～30% of mine tailing mud mass percent; Ted the mine tailing mud of processing for employing, do not add curing compound, directly mine tailing mud is delivered to paving system through transport.
In the 6th step,, adopt paving system will solidify mine tailing soil layer-by-layer casting in template for the mine tailing mud that adopts cured; Ted the mine tailing mud of processing for employing; Adopt paving system with after mine tailing mud layer-by-layer casting is in template; Successively it is tedded the mine tailing soil that is reduced to suitable moisture content to moisture content; Be called and ted mine tailing soil, and then roll, make its moisture content and degree of compaction satisfy the requirement of the existing standard of building a dam.
The 7th step, returned for the 5th step, reach the height of storehouse lattice until the height of the mine tailing soil that fills (comprise and solidify mine tailing soil and ted mine tailing soil).
The 8th goes on foot, and increases the height of storehouse lattice, template and pumped well, returns for the 5th step, until reaching the final native design filled height of mine tailing.
The invention has the advantages that:
This method is through promoting the original mine tailing mud discharging consolidation in original mine tailing storehouse; And the mine tailing mud to follow-up injection is cured or teds processing; Reduced the horizontal applied force of original mine tailing mud on the one hand, improved the security and stability on original debris dam the original debris dam; On the other hand, can increase the storage capacity in mine tailing storehouse greatly, thereby prolong the service life in mine tailing storehouse, avoid the investment and the occupation of land in newly-built mine tailing storehouse, practice thrift land resources and cost of production.Its construction equipment is simple to operate, combination is flexible, operation is quick, and construction technology is succinctly efficient.
Description of drawings
Fig. 1 is a mining tailing wasteland provided by the invention territory dilatation sketch map;
Cure system and the paving system sketch map of Fig. 2 for adopting among the present invention;
Fig. 3 is the structural representation of the mud draw-out device that adopts among the present invention.
Among the figure:
A cured system; The B paving system; M mud and curing compound mixing machinery;
A storehouse lattice; B solidifies mine tailing soil; The original mine tailing of c storehouse; D original debris dam; The original mine tailing mud of e;
F horizontal drainage passage; G vertical drainage passage; The h pumped well; I coarse granule mine tailing j separation layer; The k template;
The m work plane; The mine tailing mud of the follow-up injection of n;
1 mud draw-out device; 2 foreign material screening devices; 3 curing compound Storage appts.s; 4 curing compound transports;
5 mud and curing compound mixing arrangement; 6 mud and curing compound stir and drawing mechanism; 7 transports;
8 spreaders;
The I motor; The II turning cylinder; The III carrier pipe.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The present invention provides a kind of increase to reach the method for the mine tailing stock reserves of design storage capacity; According to actual conditions (as: factors such as the density on original mine tailing mud e surface and bearing capacity, existing mine tailing storehouse flat shape, mine tailing mud day discharge capacity); Can original mine tailing storehouse c be divided into more than one mining tailing wasteland territory, for each mining tailing wasteland territory, successive carries out subsequent operation as follows; Realize increasing the mine tailing stock reserves that reached design storage capacity, concrete steps are following:
1. lay one deck work plane m on original mine tailing mud e surface earlier, to satisfy the needs of follow-up construction working, as shown in Figure 1.Its concrete technology is following:
Density and bearing capacity size according to the mine tailing mud on surface among original mine tailing storehouse c; The laying process of work plane m can be divided into following two kinds of situation: the zone that (1) is less for the density of original mine tailing mud e on original mine tailing storehouse c surface, bearing capacity can not satisfy the requirement of the bigger curing mine tailing soil b of the follow-up density that paves; Need to lay one deck separation layer j, sink among the less original mine tailing mud e of density to prevent the bigger curing mine tailing soil b of the follow-up density that paves on original mine tailing mud e surface.This separation layer j can be the goods that sheet material and/or geotextiles, the plastic woven cloth etc. by braidings such as bamboo and wood, straws satisfy requirement of strength.Employing is then extracted the part mine tailing mud that has deposited in original mine tailing storehouse c out with the mud draw-out device 1 identical device among the A of cured system; Add suitable curing compound; Successively pave after stirring on separation layer j surface; Form the thick curing mine tailing soil b layer of 0.5m ~ 1m, treat its sclerosis after, as work plane m.Intensity (curing compound volume), thickness that this layer solidifies mine tailing soil b depend on the supporting capacity on original mine tailing mud e surface and the size of follow-up working load, and thickness that layering paves and time are depended on the supporting capacity of original mine tailing mud e that original mine tailing storehouse c is surperficial and the strength developing speed of solidifying mine tailing soil b.(2) zone that the density for original mine tailing mud e on surface among original mine tailing storehouse c is big, bearing capacity can satisfy the requirement of the bigger curing mine tailing soil b of the follow-up density that paves; Can not lay separation layer j; Directly adopt the method identical with above-mentioned (1) to lay work plane m above that, the part mine tailing mud that is about to deposit in original mine tailing storehouse c is extracted out, adds suitable curing compound; Successively pave after stirring on original mine tailing mud e surface; Form the thick curing mine tailing soil b layer of 0.5m ~ 1m, treat its sclerosis after, as work plane m.
2. in original mine tailing mud e, vertical drainage passage g is set, this vertical drainage passage g can be an existing known mode such as plastic draining board (band), sand wick; At work plane m upper surface horizontal drainage passage f is set, this horizontal drainage passage f can be an existing known mode such as plastic draining board (band), flexible water drainage pipe, sand cushion; Set up a vertical tube as pumped well h in each mining tailing wasteland territory; Be advisable with carrying out that does not influence follow-up construction and the optimal design that satisfies drainage system as far as possible in the position of pumped well h; The material of pumped well h can adopt any material that satisfies construction requirement; Like cast iron, plastics, concrete etc., the height of pumped well h should be not less than the height of storehouse lattice a and can increase along with the increase of storehouse lattice a height; Vertical drainage passage g is communicated with horizontal drainage passage f; The unified at last pumped well h place that is pooled to; And be communicated with pumped well h, making the water among original mine tailing mud e, vertical drainage passage g is passed through in curing mine tailing soil b that increases newly on top or the action of gravity that teds mine tailing soil down; The horizontal drainage passage f that flows through is pooled to pumped well h place, then with suction pump it is extracted out.Vertical drainage passage g, horizontal drainage passage f, pumped well h and whole drainage system can be by existing known method design and construction.
3. around pumped well h, construct several storehouses lattice a, the plane sizes of storehouse lattice a and the day discharge capacity decision of height by mine tailing mud n, flat shape can be an arbitrary shape, the volume of each storehouse lattice a is advisable with the mine tailing mud n that can store follow-up injection in 1 ~ 3 day; The construction material of storehouse lattice a can adopt any material that satisfies requirement of strength, like concrete, curing mine tailing soil etc.
4. build a circle dam body around in each mining tailing wasteland territory as template k; Template k highly should be highly identical with storehouse lattice a; For template k; If template k is around building in original mine tailing storehouse, then the angle of the outer wall of template k and work plane m is with 30 ° ~ 90 ° be advisable (by the character decisions of the material of building template k), and the angle of inwall and work plane m is advisable with 90 °; If template k builds between the mining tailing wasteland territory, then the angle of template k and work plane m is advisable with 90 °.The construction material of template k can adopt any material that satisfies requirement of strength, like concrete, curing mine tailing soil etc.
5. the mine tailing mud n with follow-up injection fills with storehouse lattice a successively; The mine tailing mud n of follow-up injection shelves 1 ~ 3 day (time of shelving looks the deposition velocity of mud particle and decides); Treat the mine tailing mud that Free water is discharged becomes suitable moisture content (satisfy the mud draw-out device to the prerequisite of the requirement of mud flow degree under moisture content low as far as possible) after; The requirement of strength decision of looking weather condition and heap being built the soil body is cured it and handles or ted processing, teds processing and should be higher than 0 ℃ and illumination at temperature and adopt when sufficient.
If be cured processing; Then: the mine tailing mud of the suitable moisture content of process deposition among the lattice a of storehouse is pumped to mud and curing compound mixing arrangement 5 by the mud draw-out device 1 among the A of cured system; From curing compound Storage appts. 3, in mud and curing compound mixing arrangement 5, carry curing compound simultaneously through curing compound transport 4; Suitably the mine tailing mud of moisture content mixes with curing compound in mud and curing compound mixing arrangement 5 and stirs; Form and solidify mine tailing soil b, then will solidify mine tailing soil b and be delivered to paving system B through transport 7.The curing compound incorporation by solidify the character index decision that mine tailing soil b need reach, should be controlled at mass percent be suitable moisture content mine tailing mud 3 ~ 30%.
If ted processing; Then: the mine tailing mud of the suitable moisture content of process deposition among the lattice a of storehouse is pumped to mud and curing compound mixing arrangement 5 by the mud draw-out device 1 among the A of cured system; Do not add curing compound, directly the mine tailing mud of suitable moisture content is delivered to paving system B through transport 7.
6. for through the curing mine tailing of cured soil b, adopt paving system B that it press certain hour interval, certain thickness layer-by-layer casting in described template k; The mine tailing mud of the suitable moisture content of handling for uncured; Adopt paving system B with its press certain hour interval, certain thickness layer-by-layer casting in template k after; Adopt the existing known method that teds that it is tedded; After treating that its moisture content continues to be reduced to a certain degree (satisfying the water content requirement of current specifications to the soil body of building a dam); Obtain tedding mine tailing soil, adopt existing known method to roll until degree of compaction and satisfy the requirement of current specifications the soil body degree of compaction of building a dam to tedding mine tailing soil.
7. return step 5.; The mine tailing mud n that will fill with the follow-up injection of each storehouse lattice a successively shelves 1～3 day also through behind the cured A of system; The curing mine tailing soil b that obtains or the mine tailing mud of suitable moisture content are delivered to paving system B; And the mine tailing mud layer-by-layer casting that will solidify mine tailing soil b or suitable moisture content is built the height that highly reaches storehouse lattice a until solidifying mine tailing soil b or tedding the native heap of mine tailing in described template k.In the layer-by-layer casting process of the mine tailing mud that is cured mine tailing soil b or suitable moisture content; The time that lift height and each layer pave according to the discharging consolidation speed of original mine tailing mud e, mud day discharge capacity, the area in each mining tailing wasteland territory and quantity and the volume of storehouse lattice a confirm, must guarantee the requirement that bearing capacity that original mine tailing mud e increases because of discharging consolidation can satisfy the follow-up curing mine tailing soil b that paves or ted mine tailing soil.
8. increase the height of storehouse lattice a, template k and pumped well h; Repeat 5., 6., the step in 7.; Build height until curing mine tailing soil b that reaches final design or the heap that teds mine tailing soil, the final heap that solidifies mine tailing soil b or ted mine tailing soil is built height by solidifying mine tailing soil b or tedding character (severe, cohesion, the angle of internal friction) decision of mine tailing soil.
Cured system A (as shown in Figure 2) of step described in 5. mainly comprises: mud draw-out device 1, foreign material screening device 2, curing compound Storage appts. 3, curing compound transport 4, mud and curing compound mixing arrangement 5, mud and curing compound stir and drawing mechanism 6 and transport 7.Mud draw-out device 1 can adopt the existing known draw-out device that satisfies power requirement (as: pump picking device, draw-out device as shown in Figure 3 etc.), can extract to be delivered to mud and curing compound mixing arrangement 5 through the mine tailing mud of the suitable moisture content of deposition and with it in the lattice a of storehouse; Foreign material screening device 2 is sphere structure or the semiclosed stereochemical structures with sieve aperture (aperture is preferably and is not more than 5cm); Be positioned over the entrance that is positioned at storehouse lattice a in the mud draw-out device 1; Can the mine tailing mud mesoscale of the suitable moisture content that the extracts foreign material greater than sieve aperture be screened out, in order to avoid cause the pipeline blockage of subsequent technique; Curing compound Storage appts. 3 can be the just cylindrical shell of shapes such as tube, cylinder that satisfies the volume requirement, in order to deposit curing compound slurries or powder; Curing compound transport 4 can be carried the curing compound powder in the curing compound Storage appts. 3 through known technologies such as interior dress spiral propeller or compressed air; Or, the curing compound in the curing compound Storage appts. 3 is flowed to mud and curing compound mixing arrangement 5 through the curing compound slurries in known technologies such as the pumping installations conveying Storage appts. 3; The mine tailing mud of the suitable moisture content that mud and curing compound mixing arrangement 5 opened upper end reception mud draw-out device 1 enter and the curing compound of curing compound transport 4 inputs, the bottom has opening to connect mud and curing compound stirs and drawing mechanism 6; Be provided with the mechanical agitation sheet in mud and curing compound stirring and the drawing mechanism 6 and can mine tailing mud in mud and the curing compound mixing arrangement 5 and the abundant mix of curing compound be formed curing mine tailing soil b; Then will solidify mine tailing soil b through transport 7 and be transported to paving system B (as shown in Figure 2), transport 7 can adopt existing known transmission equipment and device, as, pumping installations, Pneumatic transmission equipment etc.
When not needing cured, suitably the mine tailing mud of moisture content directly passes through stirring of mud and curing compound and drawing mechanism 6 and carries assembling device 7 entering paving system B after mud draw-out device 1 gets in mud and the curing compound mixing arrangement 5.
Described paving system B can adopt known laying equipment and the device that meets the demands, as: belt conveyers 8 etc., its effect are that the mine tailing mud that solidifies mine tailing soil b or suitable moisture content is paved in template k.
A kind of increase of the present invention has reached the method for the mine tailing stock reserves of design storage capacity, and this method can promote the rapid discharging consolidation of original mine tailing mud e in the storehouse, the safety that has improved original debris dam d; And the mine tailing mud n through to follow-up injection is cured or teds processing, can increase the storage capacity in mine tailing storehouse greatly.Its construction equipment is simple to operate, combination is flexible, operation is quick, and construction technology is succinctly efficient.
Embodiment one
Certain is about to reach the bauxite gangue storehouse of design storage capacity, 100 hectares of storehouse top surface area, and original debris dam height of dam 30m, mine tailing mud day discharge value is 1.5 ten thousand m
3, adopt method provided by the invention to increase storage capacity.Concrete grammar is following:
Flat shape and easy construction according to original mine tailing storehouse c; Original mine tailing storehouse is divided into 4 mining tailing wasteland territories, the requirement that original mine tailing mud e surface density in each mining tailing wasteland territory is all less, bearing capacity can not satisfy the bigger curing mine tailing soil of the follow-up density that paves.For each mining tailing wasteland territory in mine tailing storehouse, successive carries out subsequent operation as follows:
1. lay the separation layer j of one deck at original mine tailing mud laminar surface earlier by the bamboo wood braiding; Then adopt the pump picking device to take out the original mine tailing mud of part e from this mining tailing wasteland territory, the slag of interpolation 10% (mass fraction) and the mixture of lime are as curing compound (mass ratio of slag and lime is 9:1), and the back that stirs is according to first floor 0.1m; Second layer 0.2m; The speed that the 3rd layer of 0.5m, every 7d lay one deck is laid on separation layer j surface, forms the thick curing mine tailing soil layer of about 0.8m; After treating its sclerosis, as follow-up work face m.
2. in original mine tailing mud e, plastic draining board is set as vertical drainage passage g; Plastic drain-pipe is set as horizontal drainage passage f on work plane m surface; Set up a vertical caliber 200mm at middle part, each mining tailing wasteland territory; The plastic pipe of high 2m is as pumped well h, and vertical drainage passage g is connected with horizontal drainage passage f, is pooled to pumped well h place and connection with it.
3. around pumped well h, construct 5 storehouse lattice a; According to the day discharge capacity and the subregion situation in mine tailing storehouse of mine tailing mud, getting each storehouse lattice a flat shape is that radius is 56m, and central angle is 72 ° fan-shaped; Storehouse lattice a highly is 2m, and the construction material of storehouse lattice a adopts and solidifies mine tailing soil.
4. build a circle dam as template k with solidifying mine tailing soil around in each mining tailing wasteland territory, template k height is 2m.
5. the mine tailing mud n with follow-up injection fills with storehouse lattice a successively, and mud was shelved 3 days, makes original moisture content be about 130% mine tailing mud and is deposited as to after moisture content is about 80% mud, adopts cured.By the mud draw-out device 1 among the A of cured system it is pumped to mud and curing compound mixing arrangement 5; The curing compound slag of mine tailing mud and 10% (mass fraction) and the mixture of lime (mass ratio of slag and lime is 9:1) mix in mud and curing compound mixing arrangement 5 and stir; Form to solidify mine tailing soil b, and will solidify mine tailing soil through transport 7 and be delivered to paving system B.
6. adopt paving system B will solidify mine tailing soil b by every layer of 40cm, every 30d paves in the template k of speed layer-by-layer casting described in 4. of one deck, and paving system B adopts belt conveyer 8.
7. return step 5., successively the mine tailing mud of each storehouse lattice a is handled in a manner described, build and highly reach storehouse lattice a height until solidifying mine tailing TubDui.
8. increase the height of storehouse lattice a, template k and pumped well h, repeat 5., 6., the step in 7., according to 45 ° slope angles successively upwards heap build, until 30m, for the curing mine tailing mound of final design is built height.
In the A of cured system: it is the pump picking device of 10KW that mud draw-out device 1 adopts power; It is the sphere structure of 5cm that foreign material screening device 2 adopts screen-aperture; It is 20m that curing compound Storage appts. 3 adopts volume
3Cylinder, in order to mixture (mass ratio of slag and lime the is 9:1) powder of depositing curing compound slag and lime; Curing compound transport 4 through interior dress spiral propeller with curing compound powder conveying to mud in the curing compound Storage appts. 3 and curing compound mixing arrangement 5; In mud and curing compound mixing arrangement 5, stir with pumping by mud draw-out device 1 that the mine tailing mud that comes mixes and stir with drawing mechanism 6 with curing compound, form the native b of curing mine tailing through mud; Then mixing mud is transported to mud paving system B through transport 7.Transport 7 adopts Pneumatic transmission equipment.
Embodiment two
Certain is about to reach the iron ore mine storehouse of design storage capacity, 150 hectares of storehouse top surface area, and original debris dam height of dam 38m, mine tailing mud day discharge value is 30,000 m
3, adopt method provided by the invention to increase storage capacity.Concrete grammar is following:
Flat shape according to existing mine tailing storehouse is divided into 3 mining tailing wasteland territories with the mine tailing storehouse, and original mine tailing mud e surface density in each mining tailing wasteland territory is all bigger, and bearing capacity can satisfy the requirement of the bigger curing mine tailing soil of the follow-up density that paves.Each regional successive is carried out subsequent operation as follows:
1. directly adopt the pump picking device to take out the original mine tailing mud of part e from this mining tailing wasteland territory; The Portland cement of interpolation 6% (mass percent) and the mixture of lime are as curing compound (mass ratio of Portland cement and lime is 9:1), and it is back according to first floor 0.2m to stir, second layer 0.5m; The speed that every 6d lays one deck is laid on original mine tailing mud e surface; Form the thick curing mine tailing soil layer of about 0.7m, treat its sclerosis after, as follow-up work face m.
2. in original mine tailing mud e, sand wick is set as vertical drainage passage g; Sand wick adopts the coarse granule sandstone that produces in the ore extraction process as packing material; Plastic drain is set as horizontal drainage passage f on work plane m surface; The cast iron pipe of setting up a vertical caliber 150mm, high 3m at middle part, each mining tailing wasteland territory is as pumped well h, and vertical drainage passage g is connected with horizontal drainage passage f, is pooled to the also connection with it of pumped well h place.
3. construct 3 storehouse lattice a around the pumped well h, according to day discharge capacity and the subregion situation in mine tailing storehouse of mine tailing mud, getting each lattice a plane, storehouse is that radius is the circle of 34m, and storehouse lattice a highly be 3m, and the construction material of storehouse lattice a adopts the native build of curing mine tailing.
4. build a circle dam as template k with concrete around in each mining tailing wasteland territory, template k height is 3m, and the angle of template k inwall and work plane is 90 degree.
5. the mine tailing mud n with follow-up injection fills with storehouse lattice a successively; Mud was shelved 1 day; Make original moisture content be about 60% mine tailing mud and be deposited as, it is cured handles or ted processings (tedding processing in 6 ~ August of every year) to after moisture content is about 40% mud.For the mine tailing mud that is cured processing; By the mud draw-out device 1 among the A of cured system it is pumped to mud and curing compound mixing arrangement 5; Mine tailing mud and curing compound mix in mud and curing compound mixing arrangement 5 and stir; Form to solidify mine tailing soil b, and will solidify the native b of mine tailing through transport 7 and be delivered to paving system B; Described curing compound is the mixture of Portland cement and lime, and wherein the mass ratio of Portland cement and lime is 8:2.For the mine tailing mud that teds processing, by the mud draw-out device 1 among the A of cured system it is pumped to mud and curing compound mixing arrangement 5, do not add curing compound, be that 40% slurry transportation is to paving system B with moisture content directly through transport 7.
6. for the curing mine tailing soil b that obtains through cured, adopt paving system B will solidify mine tailing soil b by every layer of 35cm, the speed layer-by-layer casting of every 20d laying one deck in 4., belong to template k in the mining tailing wasteland territory near the inwall place; Mine tailing mud for the uncured processing; Adopt paving system B by every layer of 15cm, the core in the template k of speed layer-by-layer casting in mining tailing wasteland territory, place of every 10d laying one deck then adopts excavator that it is tedded; After treating that its moisture content is reduced to 15%; Be called and ted mine tailing soil, adopt road roller to roll degree of compaction 97%.Paving system B adopts belt conveyer 8.
7. return step 5., successively the mine tailing mud of each storehouse lattice a is handled in a manner described, and cycle repeats carries out building and highly reaching storehouse lattice a height until solidifying mine tailing soil b or tedding the mine tailing mound.
8. increase the height of storehouse lattice a, template k and pumped well h, repeat 5., 6., the step in 7., according to 60 ° slope angles successively upwards heap build, until 25m, for final curing mine tailing mound is built height.
In the A of cured system: it is the pump picking device of 20KW that mud draw-out device 1 adopts power; Foreign material screening device 2 adopts the cube structure of screen-aperture 4cm; It is 6 * 6 * 6m that curing compound Storage appts. 3 adopts volume
3Side tube, in order to deposit the curing compound slurries; Curing compound transport 4 is delivered to mud and curing compound mixing arrangement 5 through pumping installations with the curing compound slurries in the curing compound Storage appts. 3; In mud and curing compound mixing arrangement 5, stir with pumping by mud draw-out device 1 that the mine tailing mud that comes mixes and stir with drawing mechanism 6 with curing compound, form the native b of curing mine tailing through mud; Then through transport 7 mixing mud is transported to mud paving system B, transport 7 adopts pumping installations.The curing compound slurries of above-mentioned employing are the mixture of Portland cement and lime, and wherein the mass ratio of Portland cement and lime is 8:2.
Embodiment three
Certain is about to reach the copper mining tailing storehouse of design storage capacity, 60 hectares of storehouse top surface area, and original debris dam height of dam 30m, mine tailing mud day discharge value is 0.9 ten thousand m
3, adopt method provided by the invention to increase storage capacity.Concrete grammar is following:
According to the density of the mine tailing mud on surface among original mine tailing storehouse c and the flat shape of bearing capacity size and original mine tailing storehouse c; The mine tailing storehouse is divided into 3 mining tailing wasteland territories; Wherein original mine tailing mud e surface density in 2 mining tailing wasteland territories is less; Its bearing capacity can not satisfy the requirement of the bigger curing mine tailing soil of the follow-up density that paves; Original mine tailing mud e surface density in 1 mining tailing wasteland territory is bigger, and bearing capacity can satisfy the requirement of the bigger curing mine tailing soil of the follow-up density that paves, and each mining tailing wasteland territory successive is carried out subsequent operation as follows:
1. for 2 less mining tailing wasteland territories of original mine tailing mud e surface density, lay one deck geotextiles as separation layer j on original mine tailing mud e surface earlier, then adopt mud draw-out device as shown in Figure 3 to take out the mine tailing mud that part has deposited from this mining tailing wasteland territory; The Portland cement of interpolation 8% and the mixture of gypsum are as curing compound (mass ratio of Portland cement and gypsum is 9:1); Stir the back according to first floor 0.2m, second layer 0.3m, the 3rd layer of 0.5m; The speed that every 8d lays one deck is laid on separation layer j surface; Form the thick curing mine tailing soil layer of about 1m, treat its sclerosis after, as follow-up work face m; For 1 bigger mining tailing wasteland territory of original mine tailing mud e surface density; Directly take out the original mine tailing mud of part from this mining tailing wasteland territory; The Portland cement of interpolation 5% (mass percent) and the mixture of gypsum are as curing compound (mass ratio of Portland cement and gypsum is 9:1), and it is back according to first floor 0.2m to stir, second layer 0.4m; The speed that every 5d lays one deck is laid on separation layer j surface; Form the thick curing mine tailing soil layer of about 0.6m, treat its sclerosis after, as follow-up work face m.
As shown in Figure 3; Described mud draw-out device comprises motor I, turning cylinder II and carrier pipe III, and the motor I drives the rotation of turning cylinder II, has the helical blade of protrusion on the turning cylinder II; The mine tailing mud that can drive suitable moisture content upwards promotes along the carrier pipe III; And being delivered to mud and curing compound mixing arrangement 5, there is opening at carrier pipe III two ends, in order to suck and output mine tailing mud.In the present embodiment: it is the motor of 10kw that the motor I adopts power; It is the axle of 80mm that the turning cylinder II adopts diameter, and the helical blade on it is wide be 120mm, the turning cylinder II and on the making of helical blade employing alloy steel; It is the cast iron pipe of 350mm that the carrier pipe III adopts diameter.
2. in original mine tailing mud e, plastic draining board is set as vertical drainage passage g; Sand cushion is set as horizontal drainage passage f on work plane m surface; Sand cushion adopts mine tailings to make; The plastic pipe of setting up a vertical caliber 90mm, high 1.5m at each zone middle part is as pumped well h, and vertical drainage passage g is communicated with horizontal drainage passage f, is pooled to the also connection with it of pumped well h place.
3. around pumped well h, construct 4 storehouse lattice a; According to the day discharge capacity and the subregion situation in mine tailing storehouse of mine tailing mud, getting each lattice a plane, storehouse is that central angle is 90 °, and radius is the fan-shaped of 52m; Storehouse lattice a highly is 1.5m, and the construction material of storehouse lattice a adopts and solidifies the build of mine tailing soil.
4. build a circle dam as template k with solidifying mine tailing soil around in each mining tailing wasteland territory, template k height is 1.5m.
5. the mine tailing mud n with follow-up injection fills with storehouse lattice a successively, and mud was shelved 2 days, makes original moisture content be about 100% mine tailing mud and is deposited as to after moisture content is about 70% mud, adopts cured.By the mud draw-out device 1 among the A of cured system it is pumped to mud and curing compound mixing arrangement 5; Mine tailing mud mixes with curing compound in mud and curing compound mixing arrangement 5 and stirs; Form to solidify mine tailing soil b, and will solidify mine tailing soil through transport 7 and be delivered to paving system B.
6. adopt paving system B will solidify mine tailing soil b and pave in the template k of speed layer-by-layer casting described in 4. of one deck by every layer of every 30d of 40cm, paving system B adopts belt conveyer 8.
7. return step 5., successively the mine tailing mud of each storehouse lattice a is handled in a manner described, and cycle repeats carries out building and highly reaching storehouse lattice a height until solidifying mine tailing TubDui.
8. increase the height of storehouse lattice a, template k and pumped well h, repeat 5., 6., the step in 7., according to 70 ° slope angles successively upwards heap build, until 40m, for final curing mine tailing mound is built height.
In the A of cured system: mud draw-out device 1 adopts mud draw-out device as shown in Figure 3; It is the sphere structure of 3cm that foreign material screening device 2 adopts screen-aperture; It is 15m that curing compound Storage appts. 3 adopts volume
3Cylinder, in order to the mix slurry of depositing curing compound Portland cement and gypsum as curing compound (mass ratio of Portland cement and gypsum is 9:1); Curing compound transport 4 is delivered to mud and curing compound mixing arrangement 5 through pumping installations with the mix slurry of curing compound Portland cement in the curing compound Storage appts. 3 and gypsum; In mud and curing compound mixing arrangement 5, stir with pumping by mud draw-out device 1 that the mine tailing mud that comes mixes and stir with drawing mechanism 6 with curing compound, form the native b of curing mine tailing through mud; Then mixing mud is transported to mud paving system B through transport 7.Transport 7 adopts Pneumatic transmission equipment.
Claims (6)
1. an increase has reached the method for the mine tailing stock reserves of design storage capacity, it is characterized in that: original mine tailing storehouse is divided into more than one mining tailing wasteland territory, operates as follows for each mining tailing wasteland territory:
The first step is laid one deck work plane on the mine tailing mud surface in mining tailing wasteland territory;
Second step was provided with the vertical drainage passage, and at the work plane upper surface horizontal drainage passage is set in the mine tailing mud in mining tailing wasteland territory, described vertical drainage passage and horizontal drainage channel connection collect in the pumped well place at last, and are communicated with pumped well; The external suction pump of described pumped well;
The 3rd step, on work plane, construct above storehouse lattice, the volume of said storehouse lattice can be stored the mine tailing mud of discharging in 1～3 day;
The 4th step, around each mining tailing wasteland territory, build template, the template height is identical with storehouse lattice height;
The 5th step, the mine tailing mud of follow-up injection is filled with the storehouse lattice successively, in the lattice of storehouse, deposit after 1 ~ 3 day and the mine tailing mud of post-depositional suitable moisture content is pumped to mud and curing compound mixing arrangement through the mud draw-out device, divide two kinds of situation to handle as follows:
If employing cured; Mine tailing mud mixes with curing compound in mud and curing compound mixing arrangement and stirs; Form and solidify mine tailing soil; Then will solidify mine tailing soil through transport and be delivered to paving system, the addition of described curing compound is 3～30% of a mine tailing mud mass percent;
Adopt if do not adopt cured to ted processing, then do not add curing compound, directly the mine tailing mud of suitable moisture content is delivered to paving system through transport.
In the 6th step, adopt paving system will solidify mine tailing mine tailing mud layer-by-layer casting native or suitably moisture content in template; Ted the mine tailing mud of processing for employing, adopt paving system after mine tailing mud layer-by-layer casting is in template, successively to its ted be reduced to suitable moisture content to moisture content after, form and ted mine tailing soil, roll again;
The 7th step, returned for the 5th step, reach the height of storehouse lattice until the curing mine tailing that fills soil or the height that teds mine tailing soil;
The 8th goes on foot, and increases the height of storehouse lattice, template and pumped well, returns for the 5th step, until reaching final curing mine tailing soil or tedding the native design filled height of mine tailing.
2. a kind of increase according to claim 1 has reached the method for the mine tailing stock reserves of design storage capacity; It is characterized in that: in the first step; Before laying work plane, lay one deck separation layer on the surface of mine tailing mud earlier, on separation layer, lay work plane then.
3. a kind of increase according to claim 1 has reached the method for the mine tailing stock reserves of design storage capacity; It is characterized in that: template in the 4th step; If template is around building in original mine tailing storehouse; 30 ° ~ 90 ° of the angles of the outer wall of template and work plane then, 90 ° of the angles of inwall and work plane; If template is to build between the mining tailing wasteland territory, 90 ° of the angles of template and work plane then.
4. a kind of increase according to claim 1 has reached the method for the mine tailing stock reserves of design storage capacity; It is characterized in that: the laying process of work plane is in the first step: employing is extracted the part mine tailing mud that has deposited in the mine tailing storehouse out with the mud draw-out device in the cured system, adds curing compound, stirs; Successively pave then on separation layer or original mine tailing mud surface; Form the thick curing mine tailing soil layer of 0.5m ~ 1m, treat its sclerosis after, as work plane.
5. a kind of increase according to claim 1 has reached the method for the mine tailing stock reserves of design storage capacity, and it is characterized in that: the height of pumped well is not less than the height of storehouse lattice and can increases along with the increase of storehouse lattice height.
6. a kind of increase according to claim 1 has reached the method for the mine tailing stock reserves of design storage capacity; It is characterized in that: the cured system comprises mud draw-out device, foreign material screening device, curing compound Storage appts., curing compound transport, mud and curing compound mixing arrangement, mud and curing compound stirring and drawing mechanism and transport, and the mud draw-out device extracts the mine tailing mud of the suitable moisture content that passes through deposition in the lattice of storehouse and it is delivered to mud and curing compound mixing arrangement; The foreign material screening device is positioned over the entrance that is positioned at the storehouse lattice of mud draw-out device; The curing compound Storage appts. is in order to deposit curing compound powder or slurries; The curing compound transport is used for carrying curing compound powder or slurries to the mud and the curing compound mixing arrangement of curing compound Storage appts.; The mine tailing mud that mud and curing compound mixing arrangement reception mud draw-out device enter and the curing compound of curing compound transport input, the bottom has opening to connect mud and curing compound stirs and drawing mechanism; Be provided with the mechanical agitation sheet in mud and curing compound stirring and the drawing mechanism and be used for mine tailing slurry and the abundant mix of curing compound mud and curing compound mixing arrangement; Then will solidify mine tailing soil and be transported to the mud paving system through transport.
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| CN112593528B (en) * | 2020-12-25 | 2022-05-17 | 洛阳理工学院 | Molybdenum ore tailing sand reinforcing and anti-leakage method and building structure thereof |
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| CN102691304B (en) | 2014-07-02 |
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