CN111593742B - Construction method for rectifying and improving tailing pond based on rubble silt squeezing method - Google Patents
Construction method for rectifying and improving tailing pond based on rubble silt squeezing method Download PDFInfo
- Publication number
- CN111593742B CN111593742B CN202010462609.6A CN202010462609A CN111593742B CN 111593742 B CN111593742 B CN 111593742B CN 202010462609 A CN202010462609 A CN 202010462609A CN 111593742 B CN111593742 B CN 111593742B
- Authority
- CN
- China
- Prior art keywords
- dam
- sub
- drainage
- stacking
- tailing pond
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The invention relates to the technical field of mine engineering, and discloses a construction method for rectifying and reforming a tailing pond based on a riprap sludge squeezing method, which is used for reforming an original tailing pond dam, and comprises the steps of performing segmental riprap blasting, flattening and rolling on an original stacking dam, compressing the density of the original dam body, enhancing the strength of the original dam body, additionally arranging a drainage body between a first sub-dam to be built and the final elevation of the original stacking dam, enhancing the drainage function, and draining water obtained by drainage through a dam abutment drainage ditch and a drainage blind ditch, so that the damage to the dam body caused by unsmooth drainage of accumulated water or the pollution to the surrounding environment caused by the fact that the accumulated water permeates through the dam body are avoided; then, stacking and reinforcing a first sub-dam and a second sub-dam, and restoring the volume of the original stacking dam through the stacking of the first sub-dam and the second sub-dam; the whole transformation method avoids a series of problems caused by rebuilding the tailing reservoir dam and effectively solves the problems existing in the original stacking dam.
Description
Technical Field
The invention relates to the technical field of mine engineering, in particular to a construction method for rectifying and reforming a tailing pond based on a rubble silt squeezing method.
Background
China is one of the countries with the largest quantity of tailing ponds and the largest storage amount of tailings in the world, in the past, most mines solve the problem of tailing discharge by newly building and expanding a ground tailing pond, and because the components in slag change and the different rock-soil components in the tailing pond are affected by accumulated water, the tailing pond built according to the original design requirements is not affected well, and the effective service life of the tailing pond is shortened; for example, the big-beam mining small black-clump of trees and white-clump black-clump tailing pond has the following problems: 1: the grain size of the warehousing tailings is fine (about 72 percent in a 200-mesh sieve), the grain composition is poor, the content of sticky grains is large, the tailings are not obviously layered, the strength of a sedimentary beach surface is low, and the safety of a dam body directly constructed by a tailings upstream method cannot meet the standard requirement easily; 2: under the current situation, the average gradient of a sedimentary beach is slowed down to a design value under the action of accumulated water and tailing sedimentation, and the sedimentary beach is not beneficial to the later sedimentation; 3: the permeability coefficient of the fine-particle tailings is small, and the water permeability of a dam body is poor; 4: the prior seepage drainage facility can not effectively drain and drain water due to the influence of silt, if a tailing pond is rebuilt, a large amount of land is occupied, and the existing environment, economy and policy are increasingly not suitable for rebuilding the tailing pond, and a new way must be found to effectively solve the problem.
Disclosure of Invention
The invention aims to provide a construction method for rectifying and reforming a tailing pond based on a riprap sludge squeezing method, which is used for solving the problems.
The invention is realized in the following way: a construction method for reforming a tailing pond based on a riprap sludge squeezing method is used for reforming an original tailing pond dam, and the tailing pond dam comprises the following steps: the system comprises an initial dam, a stack dam, a drainage system, a seepage interception dam, a flood drainage system and a warehouse peripheral flood interception ditch; the tailing pond is characterized by further comprising a tailing pond dam body which is subjected to a riprap sludge squeezing method, wherein the tailing pond dam body comprises a first sub-dam, a second sub-dam, a dam shoulder drainage ditch and a drainage blind ditch for penetrating excessive water on the ground surface, the first sub-dam and the second sub-dam are used for reinforcing a stacking dam, the dam shoulder drainage ditch is arranged at the combination position of the stacking dam and hillsides of a downstream waste rock slope, and a drainage facility is arranged in the tailing pond dam body; the construction method comprises the following steps:
s1: sorting and throwing the waste rocks required according to required amount;
s2: sequentially dumping waste rocks with the block diameter from large to small from the inner toe of the top of the stacking dam, wherein the dumping top elevation is the top height of the first sub-dam;
s3: pushing the dam body from the right side of the stacking dam to the left side of the dam body in sections, wherein the length of each section is about 5.0-10.0 m, and after the tailings are thrown and filled to expose 20.0-50.0 cm of tailings, flattening and rolling until the tailings are compacted;
S4: laying a stone material layer with smaller grain diameter on the top layer of the throwing filling for filling the gaps and continuously rolling until the surface is compact;
s5: arranging a layer of horizontal drainage bodies at the position, which is 50.0m away from the dam top every 5m, between the elevation of the first sub-dam top and the final elevation of the original stacking dam along the direction parallel to the axis of the dam, and leading the drainage bodies into a dam abutment drainage ditch through an embedded water guide pipe;
s6: piling up the dry tailings transported outside into a first sub-dam in a wide top sub-dam mode, wherein ribs are arranged in the first sub-dam;
s7: building a second sub-dam by using the dry tailings transported outside on the basis of the first sub-dam, wherein the second sub-dam comprises a flood season wide top sub-dam and an non-flood season normal sub-dam;
s8: arranging a drainage blind ditch on the left and the right of the reservoir area respectively according to the terrain and the field test operation condition;
s9: and (4) constructing a dilution pond at the upstream of the dam body of the tailing pond.
Furthermore, after the throwing filling is completed on the original stacking dam, the area of the dam crest of the first sub-dam is 1.5-2.0 times of the area of the dam crest of the same height of the original stacking dam, the waste rock is stone blocks which are not easy to weather, the softening coefficient is required to be not less than 0.75, the soaking compressive strength is not less than 20MPa, the soil content is less than 10.0%, and the particle size is 5-50 cm.
And further, the construction method further comprises a reinforcing area, wherein the reinforcing area is constructed after the step S4 and is positioned before the tailing beach surface forms a dam, and the reinforcing area comprises a tailing natural compaction area and a riprap compaction area.
Furthermore, a tailing naturally-compacting area is arranged 20m to 30m in front of the dam, and a stone-throwing and silt-squeezing area is arranged 25.0m to 60.0m in front of the dam.
Further, step S6 includes the following damming steps:
s61: after the completion of the stone throwing and the silt squeezing, the current situation tailings beach surface is subjected to sectional airing, one side is subjected to ore drawing, and the other side is subjected to airing;
s62: after the airing is finished, laying a layer of geotextile on the beach surface;
s63: piling up a first sub-dam by using the dry tailings transported outside, adopting a reinforced sub-dam type, and rolling after piling up to enable the first sub-dam to reach a medium density state, namely, the dry density is more than or equal to 1.45t/m3(ii) a The outer slope ratio of the first sub-dam after stacking is 1:2.0, and the inner slope ratio is 1: 1.5;
s64: after the first sub-dam is built, filling dry tailings at the inner slope position; filling dry tailings layer by layer, wherein the thickness of each layer is not more than 1.0 m;
s65: after the first sub-dam in each subarea is piled up and the dry tailings are filled, airing the beach surface of the other subarea, and repeating the procedures;
s66: and (5) covering soil for greening.
Furthermore, the first sub-dams are divided into multiple stages according to the height of 3.0-7.0 m, and the working platforms are reserved in sequence for the first sub-dams of each stage.
Further, the external slope ratio of the dam in the non-flood season is 1:2.0, and the internal slope ratio is 1: 1.5; the external slope ratio of the sub-dam in the flood season is 1:2.0, the internal slope ratio is 1:1.5, and the top width is 3-5 times of that of the sub-dam in the flood season.
And further, the system also comprises a third sub-dam, wherein the third sub-dam is arranged at the upper part of the second sub-dam, and the third sub-dam is built by adopting cyclone underflow tailings.
Furthermore, the seepage drainage body is of a sand and pebble wrapping type by geotextile, and the water guide pipe is DN100 waterproof HDPE pipe with the distance of 20.0m and the gradient of 3.0%.
Further, the drainage blind ditch in the step S7 respectively comprises geotextile, gravel, broken stone, HDPE drainage and seepage flower pipes and geotextile from top to bottom, a group of bamboo cage drainage seepage wells are arranged along the blind ditch direction at intervals of 25.0-45.0 m according to the terrain and field trial operation conditions, the drainage seepage wells are of cylindrical structures, the inner diameter is 1.0-3.0 m, and the height is gradually increased along with the increase of tailing accumulation elevation.
The invention has the beneficial effects that: the invention provides a construction method for rectifying and reforming a tailing pond based on a riprap sludge squeezing method, which comprises the steps of performing segmental riprap throwing, pushing and rolling on an original stacking dam, compressing the density of the original dam body, enhancing the strength of the original dam body, additionally arranging a drainage body between a first sub-dam to be built and the final elevation of the original stacking dam, enhancing the drainage function, draining drained water through a dam shoulder drainage ditch and a drainage blind ditch, and avoiding the damage to the dam body caused by the unsmooth drainage of accumulated water or the pollution to the surrounding environment caused by the permeation of the accumulated water through the dam body; then, a first sub dam and a second sub dam which are reinforced are built, and the volume of the original stacking dam is restored through the building of the first sub dam and the second sub dam; the whole transformation method avoids a series of problems caused by rebuilding the tailing reservoir dam and effectively solves the problems existing in the original stacking dam.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a construction method of a tailings pond, which is brought by the construction method of rectifying the tailings pond based on a rubble silt squeezing method provided by the invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Example (b):
referring to fig. 1, a construction method for reforming a tailings pond based on a rubble-free silt squeezing method is used for reforming an original tailings pond dam, and the tailings pond dam comprises: in the embodiment, the tailings pond takes peat-based plate rock lead-zinc ore tailings in the girder mining industry as an example, and it needs to be noted that in other tailings, if a transformation method of the tailings pond is not changed substantially, the tailings pond also falls into the transformation method.
In the embodiment, the peat rock lead-zinc ore tailings have a high content of fine particles, wherein the content of minus 325 meshes (less than 0.044mm) accounts for 45-52%, and the content of plus 200 meshes can be about 40% of coarse particles for damming. The content of fine particles is high, so that the content of sticky particles is high, tailing layering is not obvious, and the design requirement cannot be met; under the current situation, the average gradient of a sedimentary beach is slowed down to the original design value under the action of accumulated water and fine-grained tailings sedimentation, so that later-stage sedimentation is not facilitated; the permeability coefficient of the fine-particle tailings is small, so that the water permeability of the dam body is poor.
The original tailing pond dam is reformed by the reforming method, a tailing pond dam body which is processed by a riprap sludge squeezing method is added after the reforming, the tailing pond dam body comprises a first sub-dam, a second sub-dam, a dam shoulder drainage ditch and a drainage blind ditch for penetrating excessive water on the earth surface, the first sub-dam and the second sub-dam are used for reinforcing the stacking dam, the dam shoulder drainage ditch is arranged at the combination of the dam shoulders at the two sides of the stacking dam and the downstream waste rock slope and the hillside, and a drainage facility is arranged in the tailing pond dam body; through the stone throwing and silt squeezing, the bearing capacity of the foundation is improved, the foundation settlement is reduced, the drainage consolidation of the foundation is accelerated, a good bearing layer is provided for the follow-up damming, the construction method can be carried out in a partition mode with the ore drawing of a tailing pond, and the construction method specifically comprises the following steps:
1: firstly, classifying the broken stones (waste stones) according to the required throwing and filling, wherein the waste stones are difficult to effloresce, the softening coefficient is required to be not less than 0.75, the soaking compressive strength is not less than 20MPa, the soil content is less than 10.0%, the particle size is 5-10 cm, 10-30 cm and 30-50 cm; the waste rock used to reinforce the dam must ensure its strength and integrity after forming.
2: sequentially dumping and filling the waste rocks after the stacking from big to small from a position 10.0m away from the inner toe of the dam top of the stacking dam to avoid forming a vacant area, wherein the height of the dumping and filling top is the top height of the first sub-dam; it should be noted that the elevation adopts the height of the first sub-dam, so that the construction efficiency is increased while the zoning ore drawing is not influenced, the production economic benefit is ensured, and meanwhile, the tailing reservoir dam is reformed.
3: pushing the dam body from the right side of the stacking dam to the left side of the dam body in sections, wherein the length of each section is about 5.0-10.0 m, and after the tailings are thrown and filled to expose 20.0-50.0 cm of tailings, flattening and rolling until the tailings are compacted; the purpose of the sectional propulsion is as follows: 1: the zoning ore drawing is not influenced; 2: the construction can be repeated and orderly, namely, when the first section is solidified and maintained after the completion of the second section of construction, and the third section of construction is carried out in the same way, the first section can start the next procedure.
4: and laying a stone layer with smaller grain diameter on the top layer of the throwing filling layer for filling the joints and continuously rolling until the surface is compact. In order to further reinforce the first dam, a reinforcing area can be arranged after the step, the reinforcing area is positioned before the tailing beach surface forms the dam, and the reinforcing area comprises a tailing natural compaction area which is positioned 20-30 m in front of the dam and a rubble compaction area which is positioned 25.0-60.0 m in front of the dam. The integrity of the first sub-dam and the original stacking dam is further increased through the reinforcing area, and a settlement observation point can be arranged for determining whether the fine particles are completely fixed by the reinforcing area. The average displacement rate of the tailing sand naturally compacted region is required to be not more than 5mm/d for 5 days continuously in the vertical direction; the average displacement rate of the vertical direction of the rubble-throwing and silt-squeezing area for 5 continuous days is not more than 7 mm/d.
5: arranging a layer of horizontal drainage bodies at intervals of 5m between the elevation of the first sub-dam crest and the final elevation of the original stacking dam along the direction parallel to the axis of the dam at the position 50.0m away from the dam crest, and guiding the drainage bodies into a dam abutment drainage ditch through an embedded water guide pipe; specifically, the seepage drainage body is of a sand and gravel type wrapped by geotextile, the particle size d of the sand and gravel is 5-35 mm, and the soil content is less than 3%. The cross section of the seepage drainage body is rectangular, the width is 5.0m, the thickness is 500mm, a seepage drainage blind pipe with the inner diameter of 100mm is embedded in the middle of the seepage drainage body, the seepage drainage blind pipe is connected with a water guide pipe through a three-way pipe, and the arranged cobblestone can well reduce the permeability of fine particles on the premise of ensuring certain permeability; the aqueduct adopts a watertight pipe. Such as: DN100 waterproof HDPE pipe with the distance of 20.0m and the gradient of 3.0%; the arrangement of the seepage drainage body can accelerate the drainage consolidation of the tailing pile body, reduce the infiltration line to a certain extent and increase the burial depth of the infiltration line, is one of effective anti-seismic measures and is beneficial to increasing the stability of the dam body; it should be noted that the drainage body may also be used in other ways, such as: siphon wells, radiant wells, and mechanical drainage wells.
6: piling the dry tailings which are transported outside into a first sub-dam in a wide top sub-dam mode, arranging ribs in the first sub-dam, and building the dam by the tailings to accelerate drainage and consolidation of the tailings, improve mechanical strength of the tailings and ensure stability of the piled dam; it should be noted that the damming form is not limited, and the upstream method is adopted here to build the damming; in addition, the reinforcement can adopt soil body to lay geosynthetic materials at intervals or common slope reinforcement; the main functions of tailing reinforcement comprise the following points: (1) the strength of the reinforced tailings is improved, when the reinforced soil is under the action of vertical pressure, an axial force is generated in the lacing direction, so that the lateral deformation of the soil body is limited, namely the third principal stress of the soil body unit is increased, the soil body is damaged at the moment, larger first principal stress is needed, namely larger shearing force is needed, and the strength and the bearing capacity of the reinforced tailings are improved. (2) Through the reinforcement, the distribution of the internal stress field and the displacement field of the soil body is changed, the bearing capacity of the foundation is improved, and the uneven settlement is reduced, so that the stability of the side slope is improved. (3) The stretching resistance of the bar material and the pulling resistance generated by the friction action of the bar material and the soil body can increase the anti-slip torque of the soil strips and improve the anti-slip stability safety factor of the side slope. (4) The reinforcement has good water permeability, and through the reinforcement, the drainage consolidation of the reinforcement tailings is accelerated, and the shear strength of the reinforcement tailings is improved. (5) After the reinforcing materials are laid, the construction of the stacking and seepage draining facilities of the sub-dams is facilitated, and particularly the stacking construction of the wide top sub-dams in the flood season and the sand setting and ore drawing in front of the dams are facilitated.
It should be noted that the first sub-dam can be divided into multiple stages according to the height of 3.0m to 7.0m, a working platform is reserved in sequence for the first sub-dam of each stage, and in this embodiment, the first sub-dam is mainly one stage; specific damming steps include, but are not limited to, the following:
s61: after the completion of the stone throwing and the silt squeezing, the current situation tailings beach surface is subjected to sectional airing, one side is subjected to ore drawing, and the other side is subjected to airing;
s62: after the airing is finished, laying a layer of geotextile on the beach surface;
s63: piling up a first sub-dam by using the dry tailings transported outside, adopting a reinforced sub-dam type, and rolling after piling up to enable the first sub-dam to reach a medium density state, namely, the dry density is more than or equal to 1.45t/m3(ii) a The outer slope ratio of the first sub-dam after stacking is 1:2.0, and the inner slope ratio is 1: 1.5;
s64: after the first sub-dam is built, filling dry tailings at the inner slope position; filling dry tailings layer by layer, wherein the thickness of each layer is not more than 1.0 m;
s65: after the first sub-dam in each subarea is piled up and the dry tailings are filled, airing the beach surface of the other subarea, and repeating the procedures;
s66: covering soil for greening;
the area of the dam crest of the first sub-dam is 1.5-2.0 times of the area of the dam crest of the same height of the original stacking dam.
7: building a second sub-dam by using the dry tailings transported outside on the basis of the first sub-dam, wherein the second sub-dam comprises a flood season wide top sub-dam and an non-flood season normal sub-dam; likewise, the damming form of the second sub-dam is not particularly limited, but in the present embodiment, damming is performed by an upstream method; it should also be noted that: the non-flood season wide top sub-dam is a conventional sub-dam, and the flood season wide top sub-dam is an irregular sub-dam, so that the dam can be built before the flood season of each year, and can also be completed with the first sub-dam at one time; the external slope ratio of the dam in the non-flood season is 1:2.0, and the internal slope ratio is 1: 1.5; the external slope ratio of the sub-dam in the flood season is 1:2.0, the internal slope ratio is 1:1.5, and the top width is 3-5 times of that of the sub-dam in the flood season.
8: arranging a drainage blind ditch on the left and the right of the reservoir area respectively according to the terrain and the field test operation condition; and (3) removing redundant water through the drainage and seepage blind ditch, specifically, the width of the bottom of the cross section of the blind ditch is 2.0m, the height of the cross section of the blind ditch is 1.5m, and the blind ditch structure comprises geotechnical cloth, sand gravel, broken stone, HDPE drainage and seepage perforated pipe and geotechnical cloth from top to bottom. A group of bamboo cage drainage seepage wells are arranged at intervals of 30.0m along the blind ditch direction, the drainage seepage wells are of cylindrical structures, the inner diameter of each drainage seepage well is 2.0m, and the height of each drainage seepage well is gradually increased along with the increase of tailing accumulation elevation.
9: the method comprises the steps of building a dilution pond at the upstream of a dam body of a tailing pond, wherein tailings are firstly discharged into the dilution pond and then discharged into the tailing pond, and for the peat rock lead-zinc ore tailings in the girder mining industry, as long as the dilution ore drawing concentration reaches below 30%, a dry beach can be formed in the uninterrupted ore drawing process within 24 hours of actual production, and similarly, under other similar ore sources, the dilution pond is also needed to improve the grading sedimentation effect, namely the effectiveness of forming the dry beach; similarly, when diluted tailings with the concentration of 28% are discharged, the dam body side slope with the outer slope ratio of 1:2.0 and the inner slope ratio of 1:1.5 has a good grading sedimentation effect, and different flow rates have no great influence on the effect.
Specifically, a third sub-dam can be arranged at the upper part of the second sub-dam for later sustainability development, and the underflow tailings of the cyclone of the third sub-dam are dammed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A construction method for reforming a tailing pond based on a riprap sludge squeezing method is used for reforming an original tailing pond dam, and the tailing pond dam comprises the following steps: the system comprises an initial dam, a stacking dam, a drainage system, a seepage interception dam, a flood drainage system and a warehouse peripheral flood interception ditch; the tailing pond is characterized by further comprising a tailing pond dam body which is subjected to a riprap sludge squeezing method, wherein the tailing pond dam body comprises a first sub-dam, a second sub-dam, a dam shoulder drainage ditch and a drainage blind ditch for penetrating excessive water on the earth surface, the first sub-dam and the second sub-dam are used for reinforcing a stacking dam, the dam shoulder drainage ditch is arranged at the combination position of a dam shoulder and a hillside on the two sides of the stacking dam and a downstream waste rock slope, and a drainage facility is arranged in the tailing pond dam body; the construction method comprises the following steps:
S1: sorting and throwing the waste rocks required according to required amount;
s2: sequentially dumping waste rocks with the block diameter from large to small from the inner toe of the top of the stacking dam, wherein the dumping top elevation is the top height of the first sub-dam;
s3: pushing the dam body from the right side of the stacking dam to the left side of the dam body in sections, wherein the length of each section is 5.0-10.0 m, and flattening and rolling until the tailings are exposed to 20.0-50.0 cm after throwing and filling until the tailings are compacted;
s4: laying a stone material layer with smaller grain diameter on the top layer of the throwing filling for joint filling and continuously rolling until the surface is compact; constructing a reinforcing area before a dam is formed on the surface of the tailing beach, wherein the reinforcing area comprises a tailing natural compaction area and a riprap compaction area; the tailing naturally-compacted area is 20-30 m in front of the dam, and the riprap compaction area is 25.0-60.0 m in front of the dam;
s5: arranging a layer of horizontal drainage bodies at the position 50.0m away from the dam top of the first sub-dam at intervals of 5m between the elevation of the dam top of the first sub-dam and the final elevation of the original stacking dam along the direction parallel to the axis of the dam, and guiding the drainage bodies into dam abutment drainage ditches through pre-buried water guide pipes;
s6: piling up the dry tailings transported outside into a first sub-dam in a wide top sub-dam mode, wherein ribs are arranged in the first sub-dam;
s7: building a second sub-dam by using the dry tailings transported outside on the basis of the first sub-dam, wherein the second sub-dam comprises a flood season wide top sub-dam and an non-flood season normal sub-dam;
S8: arranging a drainage blind ditch on the left and the right of the reservoir area respectively according to the terrain and the field test operation condition;
s9: and (4) constructing a dilution pond at the upstream of the dam body of the tailing pond.
2. The construction method for reforming a tailing pond based on the riprap sludge squeezing method according to claim 1, wherein after the riprap filling is completed for the original stacking dam, the area of the dam crest of the first sub-dam is 1.5-2.0 times of the area of the dam crest of the original stacking dam at the same height, and the waste rocks are difficult to effloresce rocks, and the softening coefficient is required to be not less than 0.75, the soaking compressive strength is not less than 20MPa, the soil content is less than 10.0%, and the particle size is 5-50 cm.
3. The construction method for rectifying and improving the tailing pond based on the stone-throwing sludge squeezing method as claimed in claim 1, wherein the step S6 comprises the following damming steps:
s61: after the completion of the stone throwing and the silt squeezing, the current situation tailings beach surface is subjected to sectional airing, one side is subjected to ore drawing, and the other side is subjected to airing;
s62: after the airing is finished, laying a layer of geotextile on the beach surface;
s63: piling a first sub-dam by using the outward dry tailings, adopting a reinforcement sub-dam type, and carrying out rolling after piling to enable the first sub-dam to reach a medium density state, namely carrying out dry density higher than or equal to 1.45 t/m; the outer slope ratio of the first sub-dam after stacking is 1:2.0, and the inner slope ratio is 1: 1.5;
S64: after the first sub-dam is built, filling dry tailings at the inner slope position; filling dry tailings layer by layer, wherein the thickness of each layer is not more than 1.0 m;
s65: after the first sub-dam in each subarea is piled up and the dry tailings are filled, airing the beach surface of the other subarea, and repeating the procedures;
s66: and (5) covering soil for greening.
4. The construction method for rectifying and improving the tailing pond based on the rubble silt squeezing method according to claim 3, wherein the first sub-dams are divided into multiple stages according to the height of 3.0-7.0 m, and a working platform is reserved in sequence for the first sub-dams of each stage.
5. The construction method for rectifying and reforming the tailing pond based on the riprap sludge squeezing method according to claim 1, wherein the outer slope ratio of the sub-dam in the non-flood season is 1:2.0, and the inner slope ratio is 1: 1.5; the external slope ratio of the sub-dam in the flood season is 1:2.0, the internal slope ratio is 1:1.5, and the top width is 3-5 times of that of the sub-dam in the flood season.
6. The construction method for rectifying and improving the tailing pond based on the stone-throwing sludge squeezing method as claimed in claim 1, further comprising a third sub-dam, wherein the third sub-dam is arranged at the upper part of the second sub-dam, and the third sub-dam is built by adopting the underflow tailings of the cyclone.
7. The construction method for rectifying and reforming the tailing pond based on the riprap sludge squeezing method as claimed in claim 1, wherein the drainage body is in a sand and gravel wrapping type of geotextile, and the water guide pipe is DN100 waterproof HDPE pipe, the distance between the water guide pipes is 20.0m, and the gradient is 3.0%.
8. The construction method for rectifying and improving a tailing pond based on the riprap sludge squeezing method according to claim 1, wherein the drainage blind ditches in the step S8 respectively comprise geotextile, gravel sand, broken stone, HDPE drainage and seepage floral tubes and geotextile from top to bottom, a group of bamboo cage drainage and seepage wells are arranged along the blind ditches at intervals of 25.0 m-45.0 m according to the terrain and field trial operation conditions, the drainage and seepage wells are of cylindrical structures, the inner diameter is 1.0 m-3.0 m, and the height is gradually increased along with the increase of the stacking height of tailings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010462609.6A CN111593742B (en) | 2020-05-27 | 2020-05-27 | Construction method for rectifying and improving tailing pond based on rubble silt squeezing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010462609.6A CN111593742B (en) | 2020-05-27 | 2020-05-27 | Construction method for rectifying and improving tailing pond based on rubble silt squeezing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111593742A CN111593742A (en) | 2020-08-28 |
| CN111593742B true CN111593742B (en) | 2022-05-24 |
Family
ID=72186552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010462609.6A Active CN111593742B (en) | 2020-05-27 | 2020-05-27 | Construction method for rectifying and improving tailing pond based on rubble silt squeezing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111593742B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030888A (en) * | 2020-09-03 | 2020-12-04 | 铜源国际工程设计研究有限公司 | Fine particle tailing upstream type high-strength reinforced wide-top damming method and structure |
| CN114960551B (en) * | 2022-05-27 | 2023-06-06 | 武汉一冶建筑安装工程有限责任公司 | Processing method for local bank slope to generate superficial landslide |
| CN115144567B (en) * | 2022-09-01 | 2022-11-11 | 中国有色金属工业昆明勘察设计研究院有限公司 | Upstream type tailing dam accumulation surveying and stability evaluation method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696543A (en) * | 2014-11-25 | 2016-06-22 | 贵阳铝镁设计研究院有限公司 | Dam front drainage method for sub-dam building in red mud stacking area |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261076A (en) * | 2011-05-13 | 2011-11-30 | 重庆大学 | Method for reinforcing tailing accumulation dam by tip scroll-type geogrid |
| KR20130054782A (en) * | 2011-11-17 | 2013-05-27 | 김양기 | Reinforcing method for weak ground |
| CN204753514U (en) * | 2015-06-25 | 2015-11-11 | 中国水电建设集团港航建设有限公司 | Keep off mud overfall dam |
| CN106759388A (en) * | 2017-02-14 | 2017-05-31 | 贵阳铝镁设计研究院有限公司 | A kind of slurry dry method red mud storage yard constructs the method and its structure of fill dam |
| CN106759174B (en) * | 2017-02-14 | 2018-09-18 | 中钢集团马鞍山矿山研究院有限公司 | The method that superfine granule, upper reaches method Tailing dam construction prevent earthquake liquefaction unstable failure |
| CN110499814A (en) * | 2018-05-17 | 2019-11-26 | 南京梅山冶金发展有限公司 | The row for reducing saturation line of tailings pond buried depth seeps system layer method for arranging |
| CN208563526U (en) * | 2018-07-06 | 2019-03-01 | 中钢集团马鞍山矿山研究院有限公司 | It is a kind of for adjusting the integrating device of ardealite reservoir backwater |
| CN110132200B (en) * | 2019-05-07 | 2021-07-20 | 四川安信科创科技有限公司 | Tailing pond dry beach dynamic monitoring method and system based on Beidou and video identification |
-
2020
- 2020-05-27 CN CN202010462609.6A patent/CN111593742B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696543A (en) * | 2014-11-25 | 2016-06-22 | 贵阳铝镁设计研究院有限公司 | Dam front drainage method for sub-dam building in red mud stacking area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111593742A (en) | 2020-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111593742B (en) | Construction method for rectifying and improving tailing pond based on rubble silt squeezing method | |
| CN112921905B (en) | Construction method of initial dam suitable for upstream type tailing pond | |
| CN103953008B (en) | A kind of modified mixed dam being applicable to Tailings Dam | |
| CN109610435B (en) | Loess high fill valley foundation drainage structure and laying method thereof | |
| CN103882884A (en) | Anchor rope geogrid retaining structure and method for constructing same | |
| CN109024458B (en) | Construction method for landscape revetment and underwater seepage prevention of coal mining subsidence land | |
| CN103061327B (en) | Comprehensive water control technique for dump | |
| CN112709233A (en) | Mine waste rock and concentrated tailing cooperative disposal system and construction method | |
| CN111305211B (en) | Method for heightening and expanding capacity of ultrafine particle tailing pond with one-time dam construction by adopting midline method | |
| CN113107061A (en) | Stratum reconstruction method for near-urban abandoned strip mine | |
| CN106284205A (en) | Method for building dam by hydraulic flushing of tailings of mold bag edge stems | |
| CN113445396A (en) | High-fill road foundation filling construction method for high liquid limit soil road section | |
| CN111608140A (en) | Method for rectifying potential safety hazards in operation period of upstream type tailing pond | |
| CN110644427B (en) | Ecological protection structure of river bank slope under unfavorable geological conditions and dredging method | |
| CN111648383A (en) | Internal drainage method for loess high-fill side slope | |
| CN113605492A (en) | Three-dimensional protection and utilization method for strip mine water resources | |
| CN207469222U (en) | The pre-buried vacuum drainage system in reclamation by pumping filling area | |
| CN103046536B (en) | A kind of refuse dump integral harness measure being suitable for soft foundation | |
| CN212742576U (en) | Internal drainage structure of loess high fill side slope | |
| CN112282766B (en) | Treatment method for surface collapse pit caused by sudden water burst of tunnel | |
| CN212896290U (en) | Reinforced earth stone replacement and filling foundation structure of soft soil foundation | |
| CN211228563U (en) | Assembled groundwater drainage blind ditch drainage system that oozes | |
| CN210049321U (en) | Rainwater regulation instrument suitable for in park mountain forest environment | |
| CN111206598B (en) | Method for cooperatively utilizing construction waste in hillock landscaping project | |
| CN113123301A (en) | Partition structure of gravel soil core wall dam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |