CN106833568B - Early-strength mining hole sealing material - Google Patents
Early-strength mining hole sealing material Download PDFInfo
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- CN106833568B CN106833568B CN201710043018.3A CN201710043018A CN106833568B CN 106833568 B CN106833568 B CN 106833568B CN 201710043018 A CN201710043018 A CN 201710043018A CN 106833568 B CN106833568 B CN 106833568B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
Abstract
The invention relates to an early-strength mining hole sealing material which comprises the following components in parts by weight: 0.1 to 8 percent of inorganic salt early strength component, 0.1 to 0.8 percent of organic early strength component, 0.1 to 0.5 percent of water reducing component and the balance of cement clinker. The components are mixed according to the proportion, and the finished product can be obtained after uniform stirring and dispersion. The hole sealing material has an obvious early strength effect, the 1-day strength is 14.5MPa, the 3-day strength is 26.7MPa, the 7-day strength is 39.1MPa, the net slurry fluidity is greater than 200mm, the setting time is less than 500min, the pumping performance is not influenced while the early strength performance is improved, the hole sealing use requirements of mine gas drainage and deep hole blasting are completely met, the blasting waiting time is greatly shortened, and the hole sealing material is safer. And the material can be prepared in situ underground, and is non-toxic and pollution-free. The material of the invention can be used for sealing the drill hole in the coal mine gas extraction or deep hole blasting process, and can also be used for plugging other related cracks.
Description
Technical Field
The invention relates to a mining hole sealing material, in particular to an early-strength hole sealing material suitable for sealing a coal mine gas extraction drill hole.
Background
Coal is a main energy source in China, however, a plurality of disaster accidents are caused in the process of mining, gas outburst becomes an outburst problem of coal mine safety production, drilling extraction is always a basic means for coal mine gas control, a drill hole is generally sealed after the drill hole is drilled for the drilling extraction, the hole drilling and hole sealing are key parts, and the quality of hole sealing seriously affects the gas drainage effect.
The existing direct hole sealing technology for coal seam gas pressure measurement and extraction drill hole adopts organic materials or inorganic materials for sealing, and comprises manual clay hole sealing, mechanical cement mortar hole sealing and foamed polymer material hole sealing. Wherein, the clay hole sealing method has short hole sealing length, yellow mud becomes soft when meeting water, and the strength is difficult to reach the use requirement. The mechanical cement injection mortar hole sealing has the defects of low cement condensation speed, large self-contraction degree and serious water bleeding phenomenon, is caused by deeper and deeper coal mining depth and more complex geological conditions, and the early strength of the cement-based hole sealing material can not meet the requirements of coal bed permeability increase and gas drainage when facing high-temperature, high-humidity and high-corrosivity environments. Chinese patent CN101844902A discloses that the fast-setting high-strength expansive mine hole sealing material has good effects on low cost and high expansion rate (the maximum free expansion rate in 1 day can reach more than 10%). However, the sealing material has the defects of low early compressive strength (the consolidation strength reaches 3-4MPa in one day), long setting time and the like. Polyurethane and other organic foaming hole sealing materials react violently, a large amount of reaction heat is released, strong smell is generated, the reaction speed is too fast, the initial setting time is not adjustable, the hole sealing length is not easy to control, and the influence of the environmental temperature and the humidity is large. Chinese patent CN103724581A discloses a polyurethane gas hole sealing material for underground coal mine and a preparation method thereof, the material is prepared by compounding isocyanate, polyether glycol and water glass, and has the advantages of low viscosity, large expansion factor, good flame retardant property and the like. However, the hole sealing material has great elasticity and compressibility, and the foamed hole sealing material is difficult to form an effective supporting effect on a drilled hole, so that cracks are continuously generated around the drilled hole at a hole sealing section after hole sealing. Meanwhile, polyurethane is too sensitive to moisture and cannot be applied to coal beds with high water content, and the application range of the polyurethane is limited by expensive cost.
In view of the above reasons, the early strength type hole sealing material for mine is prepared aiming at the problems that the hole sealing material has low early compressive strength, overhigh cost, poor plasticity, greatly limited use environment and the like. At present, no report about the material is found in China.
Disclosure of Invention
The technical problem is as follows:
the invention provides a novel mining hole sealing material, which can greatly improve the early strength of the hole sealing material and has good fluidity and plasticity, so that the defects of difficult use requirement of the existing hole sealing material, long condensation time, difficult control of hole sealing length, low plasticity, overhigh cost and the like are overcome, and the hole sealing success rate is improved. The invention also solves the problem that the existing mine hole sealing material cannot be directly proportioned on site, and the hole sealing material is convenient to configure, simple and convenient to operate, low in material selection price, non-toxic, environment-friendly and pollution-free.
Technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that: the early-strength mining hole sealing material is characterized in that: the hole sealing material comprises an inorganic salt early strength component, an organic matter early strength component and a water reducing component, and the rest is cement clinker.
The early-strength mining hole sealing material is characterized by comprising the following raw materials in parts by weight:
0.1 to 8 percent of inorganic salt early strength component,
0.1 to 0.8 percent of organic early strength component,
0.1 to 0.5 percent of water reducing component.
Wherein, the inorganic salt early strength component is compounded by one or more of thiocyanate, fluoroaluminate and formate; the organic early-strength component is one or more of triethanolamine, triisopropanolamine, propylene glycol and urea; the water reducing component is one or more of naphthalene sulfonic acid series, polycarboxylic acid series and melamine series high-efficiency water reducing agents.
The early-strength mining hole sealing material is characterized in that: the thiocyanate is one or more of sodium thiocyanate, calcium thiocyanate and potassium thiocyanate.
The early-strength mining hole sealing material is characterized in that: the fluoroaluminate calcium fluoroaluminate.
The early-strength mining hole sealing material is characterized in that: the calcium fluoroaluminate is prepared by matching, uniformly mixing and grinding calcium carbonate, alumina and calcium fluoride according to the molar mass of 11:7:1, and calcining for one hour at 1250-1350 ℃.
The early-strength mining hole sealing material is characterized in that: the formate is one or more of sodium formate and calcium formate.
The early-strength mining hole sealing material is characterized in that: when in use, the components are mixed according to the proportion, and the finished product can be obtained after uniform stirring and dispersion. The early strength effect is obvious, the strength is 14.5MPa in 1 day, the strength is 26.7MPa in 3 days, the strength is 39.1MPa in 7 days, the fluidity is not less than 200mm, and the setting time is not more than 500 min. The method well ensures that the pumping performance and the setting time of the hole sealing material are not influenced while the strength of the hole sealing material is improved, and completely meets the use requirements of mine gas drainage and deep hole blasting.
The early-strength hole sealing material is characterized in that: the method can be used for sealing the drilled hole in the coal mine gas extraction or deep hole blasting process, and can also be used for plugging other related cracks.
Advantageous effects
By adopting the technical scheme, the material reacts with cement, so that the workability of the cement and the decomposition rate of dicalcium silicate and tricalcium silicate in clinker are improved, the growth of ettringite crystals is promoted, and the hydration reaction process is accelerated. The early strength of the cement-based grouting material is greatly improved, and the support effect of the hole sealing material on the drilled hole is favorably enhanced. All components of the material are sourced from commercially available materials, so that the material is convenient to obtain, low in price, environment-friendly and pollution-free. The purpose of the invention is achieved.
The material has obvious early strength effect, the strength of 14.5MPa in 1 day, the strength of 26.7MPa in 3 days and the strength of 39.1MPa in 7 days. The hole sealing method has the advantages that the use requirement of the drilled hole can be met in a short period after grouting, the good use effect can be achieved, the hole sealing quality is greatly improved, gas extraction is more durable and stable, and deep hole blasting is safer and more reliable.
The material has good pumping performance (the fluidity is more than 200mm), does not prolong the setting time (the setting time is less than 500min), can be prepared and applied on the underground site, is convenient and quick, and is non-toxic and pollution-free.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
Water: 40%, calcium thiocyanate: 0.2%, triethanolamine: 0.03 percent, polycarboxylic acid high-efficiency water reducing agent: 0.1 percent. The above materials are mixed and stirred uniformly for use. When in use, the prepared material and the portland cement clinker are stirred into slurry. The results are shown in Table 1.
Table 1 pore sealing material performance test results
As can be seen from Table 1, compared with the reference group, the fluidity of the experimental group is greatly improved, and the use requirement of long-distance hole sealing can be well met; the clotting time was slightly longer than the baseline group; the 1-day compressive strength is improved by 66 percent compared with the reference group, and the 7-day compressive strength is improved by 24 percent. All performance indexes of the material can completely meet the use requirements of hole sealing materials.
Example 2
Water: 40%, calcium thiocyanate: 0.1%, calcium fluoroaluminate: 4%, triethanolamine: 0.02 percent, polycarboxylic acid high-efficiency water reducing agent: 0.1 percent. The above materials are mixed and stirred uniformly for use. When in use, the prepared material and the portland cement clinker are stirred into slurry. The test results are shown in Table 2.
Table 2 pore sealing material performance test results
As can be seen from Table 2, the initial setting time of the experimental group is 443min, and the final setting time is 496 min; the fluidity was 213 mm; the 1-day compressive strength is 14.5MPa, the 7-day compressive strength is 39.1MPa, the 1-day compressive strength is improved by 99 percent compared with the reference group, and the 7-day compressive strength is improved by 38 percent.
Claims (3)
1. The early-strength mining hole sealing material is characterized in that: the composition comprises the following components in parts by weight:
0.1 to 8 percent of inorganic salt early strength component,
0.1 to 0.8 percent of organic early strength component,
0.1 to 0.5 percent of water reducing component,
the rest material is the cement clinker, and the rest material is the cement clinker,
wherein, the inorganic salt early strength component is compounded by thiocyanate and fluoroaluminate; the organic early-strength component is one or more of triethanolamine, triisopropanolamine, propylene glycol and urea; the water reducing component is one or more of naphthalene sulfonic acid series, polycarboxylic acid series and melamine series high-efficiency water reducing agents;
the thiocyanate is calcium thiocyanate;
the fluoroaluminate is calcium fluoroaluminate;
the calcium fluoroaluminate is prepared by matching, uniformly mixing and grinding calcium carbonate, alumina and calcium fluoride according to the molar mass of 11:7:1, and calcining for one hour at 1250-1350 ℃.
2. The early strength mining hole sealing material according to claim 1, characterized in that: when in use, the components are mixed according to the proportion, and the finished product can be obtained after uniform stirring and dispersion.
3. The early strength mining hole sealing material according to claim 1, characterized in that: the method is used for sealing the drilled hole in the coal mine gas extraction or deep hole blasting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043018.3A CN106833568B (en) | 2017-01-19 | 2017-01-19 | Early-strength mining hole sealing material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043018.3A CN106833568B (en) | 2017-01-19 | 2017-01-19 | Early-strength mining hole sealing material |
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| Publication Number | Publication Date |
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| CN106833568A CN106833568A (en) | 2017-06-13 |
| CN106833568B true CN106833568B (en) | 2020-10-20 |
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| CN201710043018.3A Active CN106833568B (en) | 2017-01-19 | 2017-01-19 | Early-strength mining hole sealing material |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107651905A (en) * | 2017-09-07 | 2018-02-02 | 安徽理工大学 | A kind of morning expands by force delaying type sealing material |
| CN108101483A (en) * | 2017-12-26 | 2018-06-01 | 阳泉煤业（集团）有限责任公司 | It is a kind of for early-strength cement base sealing material of gas pumping and preparation method thereof |
| CN108947351B (en) * | 2018-08-08 | 2021-08-24 | 安徽理工大学 | Early-strength mining sealing material |
| CN110043258B (en) * | 2019-05-29 | 2024-04-16 | 山东科技大学 | Mine upward-inclined ultra-deep hole fracturing method |
| CN110260740A (en) * | 2019-06-12 | 2019-09-20 | 黑龙江科技大学 | A kind of mining borehole high-efficient homogeneous aggregate cladding sealing material |
| CN110791264A (en) * | 2019-08-06 | 2020-02-14 | 安徽理工大学 | Hydrotalcite-excited coal ash early-strength mining hole sealing material |
| CN110683807A (en) * | 2019-08-06 | 2020-01-14 | 安徽理工大学 | Nano silicon nitride excited mineral admixture early strength type mining hole sealing material |
| CN113979706A (en) * | 2021-11-03 | 2022-01-28 | 安徽佳泰矿业科技有限公司 | Composite grouting reinforcement material and preparation method thereof |
| CN115849801A (en) * | 2022-11-17 | 2023-03-28 | 安徽理工大学 | Quercetin composite multi-element early strength agent type mining hole sealing material |
Citations (1)
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| CN104774600A (en) * | 2015-03-13 | 2015-07-15 | 中国石油集团渤海钻探工程有限公司 | Oil well cement low-temperature composite early-strong coagulation accelerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298664C (en) * | 2005-08-11 | 2007-02-07 | 长安大学 | Instant coagulant and mending agent for cement stabilized base |
| US7478675B2 (en) * | 2005-09-09 | 2009-01-20 | Halliburton Energy Services, Inc. | Extended settable compositions comprising cement kiln dust and associated methods |
| US7617870B1 (en) * | 2008-05-14 | 2009-11-17 | Halliburton Energy Services, Inc. | Extended cement compositions comprising oil-swellable particles and associated methods |
| CN101200354B (en) * | 2007-11-30 | 2010-06-23 | 苏州二建建筑集团有限公司 | Concrete super instant coagulant |
| CN103626435B (en) * | 2012-08-24 | 2016-08-17 | 山东优固新材料科技有限公司 | A kind of coal and rock inorganic filler enclosed material |
| CN102977869B (en) * | 2012-12-27 | 2014-11-12 | 重庆大学 | Underground high-pressure hydraulic fracturing hole sealing material for coal mine and hole sealing technology |
| CN103159440B (en) * | 2013-02-27 | 2015-07-29 | 同济大学 | Cement based ungauged regions wall-through hole plugging material and preparation method thereof and constructional method |
| CN103145368B (en) * | 2013-03-07 | 2014-04-09 | 北京新奥混凝土集团有限公司 | Early-strength water reducer for recycled aggregate concrete |
| CN104710128A (en) * | 2015-03-11 | 2015-06-17 | 东南大学 | Super early strength accelerator for portland cement concrete |
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- 2017-01-19 CN CN201710043018.3A patent/CN106833568B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104774600A (en) * | 2015-03-13 | 2015-07-15 | 中国石油集团渤海钻探工程有限公司 | Oil well cement low-temperature composite early-strong coagulation accelerator |
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