CN108178597A - A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine - Google Patents
A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine Download PDFInfo
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- CN108178597A CN108178597A CN201711367494.7A CN201711367494A CN108178597A CN 108178597 A CN108178597 A CN 108178597A CN 201711367494 A CN201711367494 A CN 201711367494A CN 108178597 A CN108178597 A CN 108178597A
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- Prior art keywords
- early
- strong
- fast
- hard type
- cementitious material
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Classifications
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- 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
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of methods of early-strong-fast-hard type cementitious material consolidated fill metal mine.The method of this consolidated fill metal mine includes the following steps：1) preparation in place is filled；2) preparation of early-strong-fast-hard type gelling agent；3) preparation of dry blend；4) preparation of filling slurry；5) it fills.The present invention proposes to apply a kind of early-strong-fast-hard type cementitious material in the consolidated fill of metal mine.It is on duty that this method is not required to very important person in stowing operation, do not have to enter filling area in stowing operation, staff in ground support need to only be fed and pay attention to outside filling area observation exhaust outlet, it ensure that the safety in stowing operation, the placement method of the present invention can realize the requirement of high intensity in a relatively short period of time simultaneously, ensure mining efficiency.
Description
Technical field
The present invention relates to a kind of methods of early-strong-fast-hard type cementitious material consolidated fill metal mine.
Background technology
China is the production of mineral resources and consumption big country, and only non-coal mine just has more than 110,000, produces ore nearly 5,000,000,000 per year
Ton, annual value of production is more than 500,000,000,000 yuan.Mining is exploitation of mineral resources and the basis that utilizes, but mining is providing former material for the mankind
While material, ground surface environment is also inevitably destroyed.With the rapid development of industry, the demand of mineral products is increasing rapidly
Add, mineral resources are but in exhaustion increasingly, and safety, the environmental problem of resources development and utilization initiation are quite prominent, and most of China
Bargh's production scale is small, and technology falls behind, and production blindness, passivity are big, lead to mine environment severe exacerbation, to certainly
Right ecological environment and social and economic activities bring very big negative effect.Therefore, governmental authorities at all levels, environment and mining
Brainstrust is all realizing zero-emission for mining industry and is not destroying ground surface environment, reaches safe efficient, environmentally friendly and abundant recycling not
The target of renewable resource and effort, this requires not by trash discharge, in earth's surface, goaf is by timely and effective filling, not on ground
Table exploit casting resin, while will also safely, substantially effectively recycle mineral resources.Due to step essential in the method for mining by the way of filling
Suddenly it is that goaf is filled, provides integer support to country rock by obturation, control Ground pressure activity, provided for production ore
Working face, therefore, the method for mining by the way of filling is just increasingly by the attention of Mining At Home And Abroad circle and popularization, current coloured ore deposit both at home and abroad
Mountain, black mine or even coal mine all expand the application range of the method for mining by the way of filling in more research.
Consolidated fill is the core of the method for mining by the way of filling, it is by sand (including mineral dressing wastes, i.e. tailings), barren rock the like waste
It mixes a certain proportion of cementitious material and water forms the obturation with certain fluidity, stope is transported to by pipeline self
Goaf achievees the purpose that filling.It had both reduced tailings and barren rock to surface discharge, avoids pollution environment and occupies good farmland, again
Stope ground pressure can be efficiently controlled, safeguard Stope stability, avoid or reduce the geology calamities such as rock burst, gushing water, rock shifting, surface subsidence
Evil improves the production efficiency of ore, effectively recycles difficulty mining bed resource, is that buried, high-ground stress mining area and unstable rock are adopted
Field and the safely effectively mining methods of " under three " orebody mining first choice.
It in some minings, due to the difference of form of construction work, needs quickly to obtain a larger working face, study
Cement concrete of the exploitation with the performances such as hard, early strong, high-strength soon has important practical significance.Early-strength cement type at present
More, they reflect a problem jointly in the application, though here it is there is significant humidification to early anti pressured intension,
But the reduction of later stage compression strength can be led to, therefore, it is difficult to promote and apply in actual production.
Invention content
The purpose of the present invention is to provide a kind of methods of early-strong-fast-hard type cementitious material consolidated fill metal mine.
The technical solution used in the present invention is：
A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine, includes the following steps：
1) preparation in place is filled：Mining excavation scene is cleared up, is set at the hole of mining excavation and blocks barricade, in barricade
Top reserve drainage gas port, drainage gas port is built into drainage exhaust pipeline；
2) preparation of early-strong-fast-hard type gelling agent：By cement, flyash, miberal powder, quick lime, ardealite, bauxite, bromination
Sodium and water-reducing agent mixing, obtain early-strong-fast-hard type gelling agent；
3) preparation of dry blend：Classified tailings and early-strong-fast-hard type gelling agent in stirrer for mixing are stirred, are done
Batch mixing；
4) preparation of filling slurry：Dry blend and water in secondary mixer are mixed, obtain filling slurry；
5) it fills：Filling slurry is flowed automatically into mining excavation by filling pipeline, when the packed height of slurry reaches draining
During exhaust outlet, drainage exhaust pipeline is blocked, stops, for slurry, blocking filling pipeline.
In step 1), the width of barricade>50cm.
In step 1), the concrete that thickness is 4cm~6cm is smeared outside barricade.
In step 1), a diameter of 4cm~6cm of drainage gas port.
In step 2), early-strong-fast-hard type gelling agent is made of the raw material of following mass parts：35~45 parts of cement, 12~18 parts
Flyash, 15~20 parts of miberal powders, 5~10 parts of quick limes, 5~10 parts of ardealites, 5~10 parts of bauxites, 1~3 part of sodium bromide,
0.5~2 part of water-reducing agent.
In step 2), cement is Portland cement；Miberal powder is ground granulated blast furnace slag.
In step 2), water-reducing agent is lignin sulfonate water-reducing agent, naphthalene water reducer, melamine system water reducer, ammonia
At least one of base sulfonate based water reducer, fatty acid series water-reducing agent, poly carboxylic acid series water reducer.
In step 3), the mass ratio of classified tailings and early-strong-fast-hard type gelling agent is (28~32)：10.
In step 4), the solid content in filling slurry is 65wt%~75wt%.
In step 5), the outlet of filling pipeline is placed in the highest point of mining excavation.
The beneficial effects of the invention are as follows：
The present invention proposes to apply a kind of early-strong-fast-hard type cementitious material in the consolidated fill of metal mine.This method exists
It is on duty that very important person is not required in stowing operation, in stowing operation do not have to enter filling area, staff only need to ground support be fed and
Observation exhaust outlet is paid attention to outside filling area, ensure that the safety in stowing operation, while the placement method of the present invention can be with
The requirement of high intensity is realized in a relatively short period of time, ensures mining efficiency.
Specific embodiment
A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine, includes the following steps：
1) preparation in place is filled：Mining excavation scene is cleared up, is set at the hole of mining excavation and blocks barricade, in barricade
Top reserve drainage gas port, drainage gas port is built into drainage exhaust pipeline；
2) preparation of early-strong-fast-hard type gelling agent：By cement, flyash, miberal powder, quick lime, ardealite, bauxite, bromination
Sodium and water-reducing agent mixing, obtain early-strong-fast-hard type gelling agent；
3) preparation of dry blend：Classified tailings and early-strong-fast-hard type gelling agent in stirrer for mixing are stirred, are done
Batch mixing；
4) preparation of filling slurry：Dry blend and water in secondary mixer are mixed, obtain filling slurry；
5) it fills：Filling slurry is flowed automatically into mining excavation by filling pipeline, when the packed height of slurry reaches draining
During exhaust outlet, drainage exhaust pipeline is blocked, stops, for slurry, blocking filling pipeline.
Preferably, in step 1), the width of barricade>50cm.
Preferably, in step 1), the concrete that thickness is 4cm~6cm is smeared outside barricade.
Preferably, in step 1), a diameter of 4cm~6cm of drainage gas port.
Preferably, in step 2), early-strong-fast-hard type gelling agent is made of the raw material of following mass parts：35~45 parts of cement,
12~18 parts of flyash, 15~20 parts of miberal powders, 5~10 parts of quick limes, 5~10 parts of ardealites, 5~10 parts of bauxites, 1~3 part
Sodium bromide, 0.5~2 part of water-reducing agent.
Preferably, in step 2), cement is Portland cement.
Preferably, in step 2), miberal powder is ground granulated blast furnace slag.
Preferably, in step 2), flyash is two level F class flyash.
Preferably, in step 2), water-reducing agent is lignin sulfonate water-reducing agent, naphthalene water reducer, melamine series subtract
Aqua, at least one of sulfamate based water reducer, fatty acid series water-reducing agent, poly carboxylic acid series water reducer.
Preferably, in step 3), the mass ratio of classified tailings and early-strong-fast-hard type gelling agent is (28~32)：10.
Preferably, in step 4), the solid content in filling slurry is 65wt%~75wt%.
Preferably, in step 5), the outlet of filling pipeline is placed in the highest point of mining excavation.
Present disclosure is described in further detail below by way of specific embodiment.
Embodiment：
1st, the preparation in place is filled
By the discharge port of filling pipeline one end access secondary mixer, the other end is connected along mine and mining channel into need
The mining excavation to be filled, outlet are placed in the highest point of mining excavation；All useful articles, Ran Houyong are taken out in site clearing
Brick and cement are built a wall, and build the conduit into a diameter 5cm or so to drainage exhaust in the top position of barricade, it is empty to shut mining
The hole in area, the width of barricade cave in prevent backstop wall at least more than 50cm, smear the concrete of one layer of about 5cm thickness on the wall, increase
Add the anti-impact force of barricade and prevent water from oozing out.
2nd, the preparation of early-strong-fast-hard type gelling agent
By the cement of 42 mass parts, the flyash of 15 mass parts, the miberal powder of 18 mass parts, the quick lime of 7 mass parts, 7 matter
The water-reducing agent of the ardealite of amount part, the aluminium vanadine of 8 mass parts, the sodium bromide of 2 mass parts and 1 mass parts, which is added in blender, to be stirred
5~10 minutes, in 20~40r/min, airborne dust during preventing powder from stirring obtained the gelling of early-strong-fast-hard type for speed of agitator control
Agent.
Raw material used is described as follows：
Cement is common 42.5 cement of China Resources PO bought in the market.
Flyash is two level F class flyash.
Miberal powder is through crushing, screening gained, the ratio of chemical analysis and various composition for blast-furnace cinder：SiO2Content is
41.25wt%, CaO content 38.36wt%, content of MgO 7.43wt%, Al2O3Content is 11.22wt%, the oxide of S
Content is 1.32wt%, and other oxides account for 0.42wt%；The particle diameter distribution of blast-furnace cinder is：Grain size is less than 2.65 μm of particle
9wt% is accounted for, particle of the grain size less than 5.3 μm accounts for 35wt%, and particle of the grain size less than 7.55 μm accounts for 53wt%, and grain size is less than
10.71 μm of particle accounts for 65wt%, and particle of the grain size less than 26.62 μm accounts for 90wt%.
Quick lime is a kind of high calcium ash, and chemical analysis and ratio are：CaO content is 89.6wt%, and content of MgO is
5.75wt%, SiO2Content is 4.65wt%；Its particle diameter distribution is：Particle of the grain size less than 3.12 μm accounts for 10wt%, and grain size is small
40wt% is accounted in 5.35 μm of particles, particle of the grain size less than 6.83 μm accounts for 40wt%, and particle of the grain size less than 7.48 μm accounts for
60wt%, particle of the grain size less than 36.38 μm account for 90wt%.
Ardealite, particle diameter distribution are：Particle of the grain size less than 3.12 μm accounts for 10wt%, and grain size is less than 5.35 μm of particle
40wt% is accounted for, particle of the grain size less than 6.83 μm accounts for 40wt%, and particle of the grain size less than 7.48 μm accounts for 60wt%, and grain size is less than
36.38 μm of particle accounts for 90wt%.
Each chemical analysis ratio of bauxite is：SiO2Content is 8.17%, Al2O3Content is 85.07%, Fe2O3Content is
1.18%, TiO2Content is 3.76%, CaO content 0.24%, content of MgO 0.21%, K2O content is 0.44%；Bauxite
99.5% is accounted for by the ratio of 200 mesh grain sizes.
Technical grade sodium bromide of the sodium bromide for the production of Wujiang Xin Mao Chemical Co., Ltd.s, wherein bromination sodium content >=
99.6%, grain size is 200 mesh.
Water-reducing agent is melamine system water reducer.
3rd, the preliminary mixing of filling slurry
Early-strong-fast-hard type gelling agent by way of pumping is sent into vertical sand warehouse, classified tailings are pushed by bull-dozer
Sand warehouse by screw(-type) feeder, controls the revolution of screw(-type) feeder accurately to control classified tailings：The matter of early-strong-fast-hard type gelling agent
Amount is than being 3：1 adds in blender, opens blender, rotating speed 25r/min~40r/min is controlled, to prevent powder from being raised when stirring
Dirt, mixing time 10min.The discharge port of blender is opened to half discharge state, tentatively uniformly mixed dry blend is conveyed
To secondary mixer.
4th, secondary agitation
After dry blend after stirring evenly for the first time is conveyed into secondary mixer, by dry-mixed slurry：Water=7：3 mass ratio adds
Enter water, the slurry after water will be added quickly to stir, speed of agitator control is 40r/min-60r/min, quick to stir slurry 30s, is made
It is sufficiently mixed uniformly with water, while the discharge port of secondary mixer is opened, make the slurry being stirred pass through conveyance conduit into
Enter to need the goaf filled, since in this case, final pulp density is 70%, slurry can pass through defeated by gravity flow
Pipeline is sent to enter goaf, while it is also ensured that the Self-leveling of slurry, does not need to manpower intervention.
5th, the processing of discharge outlet
Due to the presence of barricade, the filling in goaf must be there are exhaust outlet mouth, and otherwise filling slurry is in the work of pressure
It can burst filling pipeline under.But when the height of filling reaches exhaust outlet, exhaust outlet outflow is crossed on the water meeting side in slurry, this
When block discharge duct, prevent slurry from pipeline opening flow out, be simultaneously stopped for slurry, goaf entrance is blocked, by it
Access gully.
6th, the cleaning of filling pipeline
After stopping feed, water supply is increased 2 times at secondary mixer, continues to stir, blender is cleaned out, prevented
Sealing mud consolidates, while water can largely enter filling pipeline, clean up main pipeline, in case next time, filling used.
The filling slurry that gained is prepared to embodiment is tested for the property.Commercially available 42.5 grades of normal silicate water is taken respectively
Mud (comparative example 1) and 42.5 grades of early-strength portland cements (comparative example 2) are as gelling agent, while the method system for pressing the present embodiment
The filling slurry of pairs of ratio, and carry out strength test with the filling slurry obtained by the present embodiment.The method of strength test according to
《GB/T50081-2016 standard for test methods of mechanical properties of ordinary concretes》, respectively intensity inspection was carried out at 3 days, 7 days and 28 days
It tests.As a result it proves：The concrete test block of comparative example 1 the intensity of 3 days, 7 days and 28 days be respectively 19.3MPa, 31.0MPa and
35.7MPa；The concrete test block of comparative example 2 the intensity of 3 days, 7 days and 28 days be respectively 21.6MPa, 33.2MPa and
36.8MPa；The concrete test block of the present embodiment is respectively 30.8MPa, 38.4MPa and 43.1MPa.As it can be seen that the present embodiment fills
Extender paste is higher than early-strength cement and plain edition cement in the intensity of 3 days, 7 days and 28 days.It is prepared by the present invention
Early-strong-fast-hard type cement can not only improve the compression strength of early stage, and the compression strength in later stage will not reduce.
The advantages of filling process of the present invention is that be not required to very important person in stowing operation on duty, does not have to enter filling in stowing operation
Area, staff need to only be fed in ground support and pay attention to outside filling area observation exhaust outlet, ensure that in stowing operation
Safety, while the present invention can realize continuous filling, ensure that pack effectiveness, advantageously ensure that the stabilization of stope ground pressure,
Reduce the probability of happening of geological disaster.
Claims (10)
- A kind of 1. method of early-strong-fast-hard type cementitious material consolidated fill metal mine, it is characterised in that：Include the following steps：1) preparation in place is filled：Mining excavation scene is cleared up, is set at the hole of mining excavation and blocks barricade, on the top of barricade Portion reserves drainage gas port, and drainage gas port is built into drainage exhaust pipeline；2) preparation of early-strong-fast-hard type gelling agent：By cement, flyash, miberal powder, quick lime, ardealite, bauxite, sodium bromide and Water-reducing agent mixes, and obtains early-strong-fast-hard type gelling agent；3) preparation of dry blend：Classified tailings and early-strong-fast-hard type gelling agent in stirrer for mixing are stirred, obtain dry blend；4) preparation of filling slurry：Dry blend and water in secondary mixer are mixed, obtain filling slurry；5) it fills：Filling slurry is flowed automatically into mining excavation by filling pipeline, when the packed height of slurry reaches drainage exhaust During mouth, drainage exhaust pipeline is blocked, stops, for slurry, blocking filling pipeline.
- 2. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 1), the width of barricade>50cm.
- 3. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 2, feature It is：In step 1), the concrete that thickness is 4cm~6cm is smeared outside barricade.
- 4. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 1), a diameter of 4cm~6cm of drainage gas port.
- 5. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 2), early-strong-fast-hard type gelling agent is made of the raw material of following mass parts：35~45 parts of cement, 12~18 parts of powder Coal ash, 15~20 parts of miberal powders, 5~10 parts of quick limes, 5~10 parts of ardealites, 5~10 parts of bauxites, 1~3 part of sodium bromide, 0.5 ~2 parts of water-reducing agents.
- 6. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 5, feature It is：In step 2), cement is Portland cement；Miberal powder is ground granulated blast furnace slag.
- 7. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 5, feature It is：In step 2), water-reducing agent is lignin sulfonate water-reducing agent, naphthalene water reducer, melamine system water reducer, amino sulphur At least one of hydrochlorate based water reducer, fatty acid series water-reducing agent, poly carboxylic acid series water reducer.
- 8. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 3), the mass ratio of classified tailings and early-strong-fast-hard type gelling agent is (28~32)：10.
- 9. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 4), the solid content in filling slurry is 65wt%~75wt%.
- 10. a kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine according to claim 1, feature It is：In step 5), the outlet of filling pipeline is placed in the highest point of mining excavation.
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| CN201711367494.7A CN108178597A (en) | 2017-12-18 | 2017-12-18 | A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine |
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| CN106746785A (en) * | 2017-02-03 | 2017-05-31 | 北京华德创业环保设备有限公司 | A kind of lower shrinkage early-strength filling in mine Binder Materials |
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| CN101864285A (en) * | 2010-06-13 | 2010-10-20 | 西南石油大学 | Deepwater cementing low-temperature early strength agent |
| CN102155261A (en) * | 2011-03-08 | 2011-08-17 | 北京科技大学 | Paste combined filling method utilizing solid wastes of mine |
| CN102557561A (en) * | 2011-11-23 | 2012-07-11 | 淄博乾耀固结材料有限公司 | High-performance sand-soil consolidation material, as well as preparation method and using method thereof |
| CN106278050A (en) * | 2016-08-19 | 2017-01-04 | 宁夏博大新型建材有限公司 | High-early (strength) cement base gelating material for prefabrication component |
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Application publication date: 20180619 |