CN108374468B - Method for blocking damage of old flood drainage system of tailing pond - Google Patents
Method for blocking damage of old flood drainage system of tailing pond Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000000903 blocking effect Effects 0.000 title claims description 10
- 239000004576 sand Substances 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 210000004907 gland Anatomy 0.000 claims abstract description 13
- 238000009825 accumulation Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 62
- 239000004575 stone Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 22
- 239000004746 geotextile Substances 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 15
- 239000004115 Sodium Silicate Substances 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 6
- 239000011362 coarse particle Substances 0.000 claims description 5
- 239000008394 flocculating agent Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000000701 coagulant Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a novel method for breakage plugging of an old flood drainage system of a tailing pond, which comprises the steps of firstly constructing and arranging a reverse filtering gland (1) at the outlet part of the old flood drainage system (3); then, in a tailing accumulation dam of a tailing pond, drilling holes from a top plate (10) of an old flood drainage system structure to penetrate through the outer wall of the old flood drainage system (3) to a bottom plate (11) of the old flood drainage system structure by using a phi 89-110 drilling machine to form grouting holes (2) in the pond; and (3) carrying out pressurized pouring of comprehensive slurry on the grouting holes (2) in the warehouse, and plugging a leakage channel in the structure of the old flood drainage system (3). The invention can quickly play a role in draining water and preventing sand leakage at the outlet part of the old flood drainage system of the tailing pond, can form a large amount of block-shaped coagulants in the interior of the old flood drainage system of the tailing pond in a short time to plug a leakage channel, has high safety and reliability, is low in cost, does not generate other potential safety hazards in the later period, and can meet the plugging requirement after the old flood drainage system of the tailing pond is damaged.
Description
Technical Field
The invention belongs to the technical field of safe treatment of tailing ponds, and particularly relates to a method for plugging damaged parts of old flood drainage systems of tailing ponds, which is particularly suitable for the safe treatment of the tailing ponds with sand leakage and slurry leakage caused by the damaged old flood drainage systems during operation and use, so as to eliminate dangerous cases and recover the normal operation of the tailing ponds.
Background
The tailings pond is an important facility of a mine enterprise, is a high-level debris flow danger source formed by artificial accumulation, and can also be an environmental pollution source; tailings ponds are currently identified by regulations as one of the major sources of danger for non-coal mines; the flood drainage system is an important safety facility of the tailings pond, and the normal operation of the flood drainage system and the timely disposal of accidents have important practical significance for the safe operation of the tailings pond.
The tailings pond dammed by adopting the upstream tailings has low cost, and is currently adopted in a large scale in China. The dam body needs to be continuously increased in the use process of the upstream tailings pond, a plurality of sets of flood discharging systems are usually arranged according to a step shape in order to discharge flood in the pond, and old flood discharging systems need to be simultaneously closed when new flood discharging systems are started. Old drainage system is buried in the storehouse and the load that receives constantly increases along with the tailing storehouse is constantly increased, and drainage system shutoff engineering is because the operating space is narrow and small, professional construction team is less and engineering quality is checked and accepted the difficulty, so the damaged accident in later stage that domestic tailing storehouse at present caused because old drainage system shutoff is out of position often causes the sand leakage, leaks thick liquid accident, and then threatens tailing storehouse overall safety and causes the environmental pollution accident.
After a damaged accident occurs to the old flood drainage system of the tailing pond, the saturated tailing accumulation bodies in the pond continuously diffuse downstream along the flood drainage channel through the damaged parts under the action of pressure, the larger the damaged parts are flushed with time, the more the downstream leakage amount of the tailing accumulation bodies in the pond gradually increases, and the tailing accumulation bodies progress to the dam body part, so that serious safety and environmental protection accidents are induced. For the tailings pond with the damage accident of the old flood drainage system, the research and reliable method are adopted to safely and reliably carry out damage plugging in the shortest time, and the important significance is achieved in avoiding the influence of the accident on the safety of the tailings pond and the safety of people and property and environmental pollution caused by the accident on the downstream.
The existing blocking method for the old flood drainage system of the tailing pond after a damage accident has no system solution, and the main field disposal measures mainly comprise two types: one is to carry out a back filtering gland at the outlet part of the flood discharge system; and the other method is to put materials with certain volume, such as branch bundles, sand bags and the like, into the damaged part in the warehouse for blocking, so as to achieve the purpose of blocking the damaged part.
In practical application, the existing method for blocking the damaged accident of the old flood drainage system of the tailing pond has the following problems:
(1) no system provides a disposal method for the damage accident of the old flood drainage system of the tailing pond, and the emergency rescue time is usually delayed due to the fact that the scheme is not clear when the accident is actually disposed.
(2) The existing disposal measures can only solve the problem of temporary leakage stoppage, and have a certain negative effect on permanent plugging because of the poor durability of the thrown materials, so that the materialization safety cannot be realized.
Disclosure of Invention
The invention aims to provide a novel method for breakage and blockage of an old drainage system of a tailing pond, aiming at the technical defects of low reliability and durability, incapability of realizing essential safety and the like of the existing method for breakage and blockage of the old drainage system of the tailing pond, and the method is used for disposal when the closed and independent old drainage system of the tailing pond is broken, so that the requirements of emergency disposal and permanent blockage of the old drainage system of the tailing pond are met.
In order to achieve the purpose, the novel method for blocking the damaged tailing pond old flood drainage system is realized by adopting the following processes and steps:
1) and (3) plugging the outlet part of the old flood drainage system: firstly, constructing and arranging a reverse filtering gland at the outlet part of an old flood drainage system, and forming a permanent pressure carrier to ensure the stability of a side slope; the reverse filter gland comprises reinforced geotextile, a coarse sand layer, reinforced geotextile, a gravel layer, a crushed stone layer, a rock block layer and a gabion from inside to outside in sequence; the reinforced geotextile plays a role in reverse filtration and drainage, ensures the stability of a coarse sand layer and simultaneously cuts off the outward loss of fine particles in an old flood drainage system; the coarse sand layer is formed by laying coarse sand with the particle size of 0.35-2 mm, plays a role in reverse filtering and drainage and serves as a supporting body of the reinforced geotextile; the gravel layer is formed by paving gravels with the particle size of 20-40 mm, and the gravel layer can play a transition role between the coarse sand layer and the gravel layer to support a coarse sand body; the gravel layer is formed by paving broken stones with the particle size of 20-50 mm, and the gravel layer can play a transition role between the gravel layer and the block stone layer to prevent gravel displacement; the lump stone layer adopt the 50 ~ 150mm lump stone of particle size to lay and form, the lump stone layer can play the transition effect between rubble layer and gabion, prevents the rubble displacement.
The construction porosity of the gravel layer and the crushed stone layer is less than or equal to 22 percent, the construction porosity of the block stone layer is less than or equal to 25 percent, and the relative density of the coarse sand layer is 0.73-0.77, preferably 0.75.
2) Drilling and grouting operation inside old flood drainage system
The method comprises the following two steps:
step 1: in a tailing accumulation dam of a tailing pond, drilling holes from a top plate of an old flood drainage system structure to a bottom plate of the old flood drainage system structure by using a phi 89-110 drilling machine to penetrate through the outer wall of the old flood drainage system structure to perform hole exploration, and forming grouting holes in the pond;
step 2: after the internal conditions of the old flood drainage system structure are mastered through the step 1, a drill bit of a drilling machine is lifted to the top plate part of the old flood drainage system structure to perform pressurized filling of comprehensive slurry to a grouting hole in a warehouse, so that a leakage channel in the old flood drainage system structure can be plugged in a short time; the comprehensive slurry material is formed by mixing cement, tailings, water-soluble sodium silicate and an underwater undispersed concrete flocculating agent.
The tailings are graded coarse-particle tailings, and the mass of particles with the particle size larger than 0.5mm in the tailings exceeds 50% of the total mass.
The gabion is 1.0-2 m long and wide and 0.5-1 m high, the rubble stones are arranged in the gabion, and the PVC protective layer is coated on the surface of the steel wire of the gabion.
The Baume degree of the water-soluble sodium silicate is 38.4-48.3, and the mixing amount accounts for 3-4% of the cement amount; the underwater undispersed concrete flocculant is preferably a UWB-II type, and the doping amount accounts for 2-5% of the cement consumption.
Or: in the comprehensive slurry material, the mass ratio of water, cement, water-soluble sodium silicate and the underwater undispersed concrete flocculant is (1-0.6) to 1: (0.03-0.04): 0.02-0.05).
The specification of the reinforced geotextile is 450g/m2。
The novel method for blocking the damage of the old flood drainage system of the tailing pond has the following beneficial effects after adopting the technical scheme:
(1) the method can quickly play a role in draining water and preventing sand leakage at the outlet part of the old flood drainage system of the tailing pond, fine-particle natural aggregate can effectively perform reverse filtration and drainage, coarse-particle natural aggregate and the gabion can effectively cover a damaged opening part, so that the normal function of a reverse filtration structure is ensured, a permanent pressure carrier is formed, and the stability of a side slope is ensured.
(2) The method adopts cement, tailing, water-soluble sodium silicate and underwater undispersed concrete flocculant comprehensive slurry to fill the positions in the old flood drainage system of the tailing pond, can form a large amount of massive coagulants in a short time to plug leakage channels, and form effective strength in leakage spaces along with the time; the comprehensive slurry has a better flocculation effect underwater, can ensure that slurry materials do not disperse and separate underwater, and enhances the timeliness of the plugging body.
(3) The method conforms to the general principle of plugging and water stopping of the tailing pond of front retaining and rear discharging, realizes the synchronous completion of permanent plugging and slope pressing operation in the emergency plugging process, has high safety and reliability, is low in cost, does not generate other potential safety hazards in the later period, and can meet the plugging requirement after the old flood drainage system of the tailing pond is damaged.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a novel method for plugging damaged old drainage systems of a tailing pond according to the invention;
fig. 2 is a schematic structural diagram of a reverse filtering gland at the outlet part of an old flood drainage system in a new method for breakage and plugging of the old flood drainage system of a tailing pond according to the invention;
fig. 3 is a schematic layout of a grouting step 1 at an internal part of an old flood drainage system reservoir in the new method for sealing damage of the old flood drainage system of the tailing reservoir in the invention;
fig. 4 is a schematic layout diagram of the grouting step 2 at the internal part of the old drainage system reservoir in the new method for sealing the damaged old drainage system of the tailing reservoir.
The reference signs are: 1-a reverse filter gland; 2-grouting holes in the warehouse; 3-old flood drainage system; 4-reinforced geotextile; 5-coarse sand layer; 6-a gravel layer; 7-a rubble layer; 8-a block stone layer; 9-gabion; 10-top plate of old flood drainage system structure; 11-old drainage system structure bottom plate.
Detailed Description
For further description of the present invention, the following will explain in detail a new method for plugging damaged old drainage system of tailings pond with reference to the attached drawings and examples.
The invention discloses a method for plugging damaged old flood drainage systems of tailing ponds, which is completed in the research and implementation processes of national science fund projects (number: 51539006) by an inventor.
As shown in fig. 1 and shown in fig. 2, the cross-sectional structure of the method for plugging damaged old drainage systems of the tailing pond of the invention is schematically shown, and the following processes and steps are adopted in the novel method for plugging damaged old drainage systems of the tailing pond of the invention:
1) and (3) plugging the outlet part of the old flood drainage system: firstly, constructing and arranging a reverse filter gland 1 at an outlet part of an old flood drainage system 3, and forming a permanent pressure carrier to ensure the stability of a side slope; the reverse filtering gland 1 comprises a reinforced geotextile 4, a coarse sand layer 5, a reinforced geotextile 4, a gravel layer 6 and broken stones from inside to outside in sequenceA layer 7, a block stone layer 8 and a gabion 9; the specification of the reinforced geotextile 4 is 450g/m2The reinforced geotextile 4 plays a role in reverse filtration and drainage, ensures the stability of the coarse sand layer 5 and simultaneously cuts off the outward loss of fine particles in the old flood drainage system 3; the coarse sand layer 5 is formed by laying coarse sand with the particle size of 0.35-2 mm, and the coarse sand layer 5 plays a role in reverse filtering and drainage and serves as a support body of the reinforced geotextile 4; the gravel layer 6 is formed by paving gravels with the particle size of 20-40 mm, and the gravel layer 6 can play a transition role between the coarse sand layer 5 and the gravel layer 7 to support a coarse sand body; the gravel layer 7 is formed by paving broken stones with the particle size of 20-50 mm, and the gravel layer 7 can play a transition role between the gravel layer 6 and the block stone layer 8 to prevent gravel displacement; the stone block layer 8 is formed by paving stone blocks with the particle size of 50-150 mm, and the stone block layer 8 can play a transition role between the gravel layer 7 and the gabion 9 to prevent the gravel from moving; the length and the width of the gabion 9 are both 1.0-2 m and 0.5-1 m, the PVC protective layer is coated on the surface of the steel wire of the gabion 9, and the gabion 9 covers the outermost layer, so that the effect of integrally stabilizing the reverse filter gland structure can be achieved.
2) Drilling and grouting operation inside old flood drainage system
As shown in fig. 3, the arrangement schematic diagram of the grouting step 1 at the internal part of the old drainage system of the new method for sealing the damaged old drainage system of the tailing pond of the invention, and the arrangement schematic diagram of the grouting step 2 at the internal part of the old drainage system of the new method for sealing the damaged old drainage system of the tailing pond of the invention, which are shown in fig. 4, the drilling and grouting operations are performed in two steps:
step 1: in a tailing accumulation dam of a tailing pond, drilling holes from a top plate 10 of an old flood drainage system structure to penetrate through the outer wall of an old flood drainage system 3 to a bottom plate 11 of the old flood drainage system structure by using a phi 89-110 drilling machine to perform hole exploration operation, and forming grouting holes 2 in the pond;
step 2: after the internal condition of the old flood drainage system 3 structure is mastered through the step 1, a drill bit of a drilling machine is lifted to the top plate 10 of the old flood drainage system structure to perform pressurized grouting of comprehensive slurry on a grouting hole 2 in a warehouse, the comprehensive slurry can form a large amount of block-shaped concretes in a short time to plug a leakage channel in the old flood drainage system 3 structure, and effective strength is formed in a leakage space along with the time; the comprehensive slurry material is formed by mixing cement, tailings, water-soluble sodium silicate and an underwater undispersed concrete flocculating agent. The comprehensive slurry has a better flocculation effect underwater, can ensure that the cementing material does not disperse and separate underwater, and enhances the timeliness of the plugging body.
The tailings are graded coarse-particle tailings, and the mass of particles with the particle size larger than 0.5mm in the tailings exceeds 50% of the total mass; the Baume degree of the water-soluble sodium silicate is 38.4-48.3, and the mixing amount accounts for 3-4% of the cement amount; the underwater undispersed concrete flocculant is of a UWB-II type, and the doping amount accounts for 2-5% of the cement consumption.
Or: in the comprehensive slurry material, the mass ratio of water, cement, water-soluble sodium silicate and the underwater undispersed concrete flocculant is (1-0.6) to 1: (0.03-0.04) and (0.02-0.05).
The application of the novel method for sealing the damaged part of the old flood drainage system of the tailing pond shows that the method can quickly play a role in draining water and preventing sand leakage at the outlet part of the old flood drainage system of the tailing pond, fine-particle natural aggregate can effectively perform reverse filtration and drainage, coarse-particle natural aggregate and gabion can effectively cover the damaged part, the normal function of a reverse filtration structure is ensured, and a permanent pressure carrier is formed to ensure the stability of a side slope. The method adopts cement, tailing, water-soluble sodium silicate and underwater undispersed concrete flocculant comprehensive slurry to fill the positions in the old flood drainage system of the tailing pond, can form a large amount of massive coagulants in a short time to plug leakage channels, and form effective strength in leakage spaces along with the time; the comprehensive slurry has a better flocculation effect underwater, can ensure that slurry materials do not disperse and separate underwater, and enhances the timeliness of the plugging body. The method conforms to the general principle of plugging and water stopping of the tailing pond with front and rear baffles, realizes the synchronous completion of permanent plugging and slope pressing operation in the emergency plugging process, has high safety and reliability, is low in cost, does not generate other potential safety hazards in the later period, and can meet the plugging requirement after the old flood drainage system of the tailing pond is damaged.
Claims (7)
1. A method for blocking damage of an old flood drainage system of a tailing pond is characterized by comprising the following steps:
1) and (3) plugging the outlet part of the old flood drainage system: firstly, constructing and arranging a reverse filtering gland (1) at the outlet part of an old flood drainage system (3) and forming a permanent pressure carrier; the reverse filtering gland (1) comprises a reinforced geotextile (4), a coarse sand layer (5), a reinforced geotextile (4), a gravel layer (6), a gravel layer (7), a block stone layer (8) and a gabion (9) from inside to outside in sequence; the gravel layer is characterized in that the coarse sand layer (5) is formed by paving coarse sand with the particle size of 0.35-2 mm, the gravel layer (6) is formed by paving gravel with the particle size of 20-40 mm, the gravel layer (7) is formed by paving gravel with the particle size of 20-50 mm, and the block stone layer (8) is formed by paving block stones with the particle size of 50-150 mm;
2) drilling and grouting operation inside old flood drainage system
The method comprises the following two steps:
step 1: in a tailing accumulation dam of a tailing pond, a phi 89-110 drilling machine is adopted to drill a hole from a top plate (10) of an old flood drainage system structure to penetrate through the outer wall of an old flood drainage system (3) to a bottom plate (11) of the old flood drainage system structure to form a grouting hole (2) in the pond;
step 2: after the internal conditions of the structures of the old flood drainage system (3) are mastered through the step 1, a drill bit of a drilling machine is lifted to the top plate (10) of the structures of the old flood drainage system to perform pressurized filling of comprehensive slurry to a grouting hole (2) in a warehouse, and a leakage channel in the structures of the old flood drainage system (3) is plugged; the comprehensive slurry material is formed by mixing cement, tailings, water-soluble sodium silicate and an underwater undispersed concrete flocculating agent.
2. A method for blocking damage of an old flood drainage system of a tailing pond is characterized by comprising the following steps:
1) and (3) plugging the outlet part of the old flood drainage system: firstly, constructing and arranging a reverse filtering gland (1) at the outlet part of an old flood drainage system (3) and forming a permanent pressure carrier; the reverse filtering gland (1) comprises a reinforced geotextile (4), a coarse sand layer (5), a reinforced geotextile (4), a gravel layer (6), a gravel layer (7), a block stone layer (8) and a gabion (9) from inside to outside in sequence; the gravel layer is characterized in that the coarse sand layer (5) is formed by paving coarse sand with the particle size of 0.35-2 mm, the gravel layer (6) is formed by paving gravel with the particle size of 20-40 mm, the gravel layer (7) is formed by paving gravel with the particle size of 20-50 mm, and the block stone layer (8) is formed by paving block stones with the particle size of 50-150 mm;
2) drilling and grouting operation inside old flood drainage system
The method comprises the following two steps:
step 1: in a tailing accumulation dam of a tailing pond, a phi 89-110 drilling machine is adopted to drill a hole from a top plate (10) of an old flood drainage system structure to penetrate through the outer wall of an old flood drainage system (3) to a bottom plate (11) of the old flood drainage system structure to form a grouting hole (2) in the pond;
step 2: after the internal conditions of the structures of the old flood drainage system (3) are mastered through the step 1, a drill bit of a drilling machine is lifted to the top plate (10) of the structures of the old flood drainage system to perform pressurized filling of comprehensive slurry to a grouting hole (2) in a warehouse, and a leakage channel in the structures of the old flood drainage system (3) is plugged; the comprehensive slurry material is a mixture of water, cement, water-soluble sodium silicate and an underwater undispersed concrete flocculating agent.
3. The method for plugging the damaged old flood drainage system of the tailing pond according to claim 1, wherein the method comprises the following steps: the tailings are graded coarse-particle tailings, and the mass of particles with the particle size larger than 0.5mm in the tailings exceeds 50% of the total mass.
4. The method for plugging the damaged old flood discharge system of the tailing pond according to claim 1 or 3, wherein the method comprises the following steps: the gabion (9) is 1.0-2 m long and wide and 0.5-1 m high, and a pvc protective layer is coated on the surface of a steel wire of the gabion (9).
5. The method for plugging the damaged old flood drainage system of the tailing pond according to claim 4, wherein the method comprises the following steps: the Baume degree of the water-soluble sodium silicate is 38.4-48.3, and the mixing amount accounts for 3-4% of the cement amount; the underwater undispersed concrete flocculant is of a UWB-II type, and the doping amount accounts for 2-5% of the cement consumption.
6. The method for plugging the damaged old flood drainage system of the tailing pond according to claim 2, wherein the method comprises the following steps: the Baume degree of the water-soluble sodium silicate is 38.4-48.3; in the comprehensive slurry material, the mass ratio of water, cement, water-soluble sodium silicate and the underwater undispersed concrete flocculant is (1-0.6) to 1: (0.03-0.04) and (0.02-0.05).
7. The method for plugging the damaged old flood drainage system of the tailing pond according to claim 6, wherein the method comprises the following steps: the specification of the reinforced geotextile (4) is 450g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185378.1A CN108374468B (en) | 2018-03-07 | 2018-03-07 | Method for blocking damage of old flood drainage system of tailing pond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185378.1A CN108374468B (en) | 2018-03-07 | 2018-03-07 | Method for blocking damage of old flood drainage system of tailing pond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108374468A CN108374468A (en) | 2018-08-07 |
| CN108374468B true CN108374468B (en) | 2020-03-31 |
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| CN201473960U (en) * | 2009-09-09 | 2010-05-19 | 中国瑞林工程技术有限公司 | Tailing dam leakage plugging and reinforcing device |
| CN104452788A (en) * | 2014-12-08 | 2015-03-25 | 鞍钢集团矿业公司 | Method and device for blocking return water pipeline of tailing pond |
| CN104652492A (en) * | 2015-01-09 | 2015-05-27 | 中钢集团马鞍山矿山研究院有限公司 | Seepage draining system of tailing pond cohesive soil initial dam |
| CN105179011A (en) * | 2015-09-04 | 2015-12-23 | 金建工程设计有限公司 | Tunnel plugging facility and tunnel plugging method |
| WO2018014069A1 (en) * | 2016-07-19 | 2018-01-25 | Mark Robert Edmund Curtis | Sealing system for dam walls |
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| CN201473960U (en) * | 2009-09-09 | 2010-05-19 | 中国瑞林工程技术有限公司 | Tailing dam leakage plugging and reinforcing device |
| CN104452788A (en) * | 2014-12-08 | 2015-03-25 | 鞍钢集团矿业公司 | Method and device for blocking return water pipeline of tailing pond |
| CN104652492A (en) * | 2015-01-09 | 2015-05-27 | 中钢集团马鞍山矿山研究院有限公司 | Seepage draining system of tailing pond cohesive soil initial dam |
| CN105179011A (en) * | 2015-09-04 | 2015-12-23 | 金建工程设计有限公司 | Tunnel plugging facility and tunnel plugging method |
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Address after: 243000 Xitang Road, Ma'anshan Economic Development Zone, Anhui, No. 666 Co-patentee after: HUAWEI METAL MINERAL RESOURCE EFFICIENT RECYCLING UTILIZATION NATIONAL ENGINEERING RESEARCH CENTER Co.,Ltd. Patentee after: MAANSHAN Mine Research Institute Co.,Ltd. Address before: 243000 Xitang Road, Ma'anshan Economic Development Zone, Anhui, No. 666 Co-patentee before: HUAWEI METAL MINERAL RESOURCE EFFICIENT RECYCLING UTILIZATION NATIONAL ENGINEERING RESEARCH CENTER Co.,Ltd. Patentee before: SINOSTEEL MAANSHAN INSTITUTE OF MINING RESEARCH Co.,Ltd. |