CN114470602B - Fire extinguishing material for shallow goaf of coal field fire zone and preparation method thereof - Google Patents
Fire extinguishing material for shallow goaf of coal field fire zone and preparation method thereof Download PDFInfo
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- CN114470602B CN114470602B CN202210192539.6A CN202210192539A CN114470602B CN 114470602 B CN114470602 B CN 114470602B CN 202210192539 A CN202210192539 A CN 202210192539A CN 114470602 B CN114470602 B CN 114470602B
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- 239000000463 material Substances 0.000 title claims abstract description 193
- 239000003245 coal Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 29
- 230000002265 prevention Effects 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 65
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 36
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 36
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 36
- 239000000378 calcium silicate Substances 0.000 claims description 36
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 36
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 28
- 239000004570 mortar (masonry) Substances 0.000 claims description 23
- 239000010881 fly ash Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 18
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 18
- 239000001110 calcium chloride Substances 0.000 claims description 18
- 235000011148 calcium chloride Nutrition 0.000 claims description 18
- 239000000292 calcium oxide Substances 0.000 claims description 18
- 235000012255 calcium oxide Nutrition 0.000 claims description 18
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 18
- 239000008119 colloidal silica Substances 0.000 claims description 18
- 239000004088 foaming agent Substances 0.000 claims description 18
- 235000011147 magnesium chloride Nutrition 0.000 claims description 18
- 239000011780 sodium chloride Substances 0.000 claims description 18
- 235000002639 sodium chloride Nutrition 0.000 claims description 15
- 239000005909 Kieselgur Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011049 filling Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a fire extinguishing material for a shallow goaf in a coal field fire zone and a preparation method thereof, wherein the fire extinguishing material comprises the following raw materials in parts by weight: 25-35 parts of loess, 8-12 parts of water, 25-50 parts of suspended sand particles, 10-20 parts of inorganic fire prevention and extinguishing material, 15-30 parts of fire extinguishing curing expansion material and 5-10 parts of high polymer solid fire extinguishing material; the fire extinguishing material prepared by the invention has better filling performance, flow performance and water retention performance, can quickly reduce the temperature of the fire area of the coal field and effectively prevent air from flowing, thereby preventing the fire extinguishing material from further burning in the shallow goaf of the fire area of the coal field, reducing the damage of the burning in the shallow goaf of the fire area of the coal field to the atmospheric environment, simultaneously saving the fire extinguishing material and reducing the fire extinguishing cost, and having remarkable social benefit and economic benefit for treating the shallow goaf of the fire area of the coal field.
Description
Technical Field
The invention relates to the technical field of fire extinguishing material preparation, in particular to a fire extinguishing material for a shallow goaf of a fire area of a coal field and a preparation method thereof.
Background
In Xinjiang Uygur autonomous region of China, which is one of the most serious regions in coal field fire burning region, coal bed fire burning exists in Jurassic strata. Along with the exploitation in recent years, the coal field goaf exists in more Xinjiang, which causes the spontaneous combustion phenomenon to be very easy to occur in the exploitation process, the ground is seriously collapsed, a large number of cracks are generated, great economic loss can be caused, and meanwhile, the ecological environment can be seriously damaged.
The common technical processes of fire prevention and extinguishment in the coal field comprise five technical processes of stripping, water injection, drilling, grouting, covering and the like. Grouting is one of main processes for preventing and treating fire areas of coal fields, grouting materials in the existing fire extinguishing engineering of the coal fields mainly comprise common slurry, foamed cement slurry and composite slurry, wherein the common slurry is a mixture of loess and water, the sand content of the loess needs to reach 25-30%, the particle size of sand needs to be between 1-2mm and other factors, so that the loess is difficult to select sites, and the ecological environment is easy to damage; the foaming cement slurry mainly comprises water and cement, and has the highest practicability in the fire extinguishing process of the coal field, but the cement solidification material has grouting resistance and is not suitable for the treatment of shallow goafs in the fire area of the coal field, so that the fire extinguishing effect of the shallow goafs in the fire area of the coal field is not ideal; the composite slurry is a grouting material with the best use effect at present, and realizes the oxygen insulation, temperature reduction and flame retardant effects of a shallow goaf in a fire zone of a coal field through the water content and the bonding characteristics of the material, but the existing method has relatively high cost and is difficult to popularize and use in a large number of areas. Therefore, the fire extinguishing material with good fire extinguishing effect and low preparation cost for the shallow goaf of the fire zone of the coal field is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a fire extinguishing material for a shallow goaf in a fire zone of a coal field and a preparation method thereof, so as to solve the problems of high preparation cost and non-ideal fire extinguishing effect of the grouting material prepared in the prior art.
The technical scheme for solving the technical problems is as follows: the fire extinguishing material for the shallow goaf of the fire area of the coal field comprises the following raw materials in parts by weight: 25-35 parts of loess, 8-12 parts of water, 25-50 parts of suspended sand particles, 10-20 parts of inorganic fire prevention and extinguishing material, 15-30 parts of fire extinguishing curing expansion material and 5-10 parts of high polymer solid fire extinguishing material.
The invention has the beneficial effects that: loess and water can form mud mortar, and suspended sand particles can increase the viscosity, water retention property and permeability of the mud mortar; the inorganic fire prevention and extinguishing material has oxygen insulation and fire extinguishing effects; the fire extinguishing curing expansion material has the functions of filling, stopping leakage and preventing collapse; the solid conversion that realizes water can be accelerated to polymer solid fire extinguishing material, blocks up the media crack, wraps up the high temperature coal body, isolated oxygen, when inorganic fire prevention and extinguishing material, the solidification expanded material of putting out a fire, during polymer solid fire extinguishing material adds the silt slurry simultaneously, produces the synergism between each component, not only can promote the performance of viscosity, water retentivity, permeability, also has certain adsorption to carbon monoxide simultaneously, can accelerate the speed of putting out a fire.
On the basis of the technical scheme, the invention can be further improved as follows:
further, the fire extinguishing material comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material, 23 parts of fire extinguishing curing expansion material and 8 parts of high polymer solid fire extinguishing material.
Furthermore, the particle size of the suspended sand particles is 1-2mm.
Further, the inorganic fire prevention and extinguishing material comprises the following components: calcium silicate, diatomaceous earth and colloidal silica.
The beneficial effect of adopting the further technical scheme is as follows: the calcium silicate has good fire resistance and strong heat insulation, and can prevent fire and retard flame; the diatomite has strong adsorbability and heat insulation, wide market application and low price; the colloidal silica has good fire resistance, can increase certain viscosity, and has the effect of isolating oxygen.
Further, the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:2.5-3.5:5.5-6.5.
Further, the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:3:6.
further, the fire extinguishing curing expansion material comprises the following components: calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide.
The beneficial effects of adopting the further technical scheme are as follows: the calcium silicate has good fire resistance and strong heat insulation, and can prevent fire and retard flame; the phosphogypsum has good cohesiveness, plasticity, heat insulation, fire resistance and stability; the quicklime has good fire resistance and drying property, and is wide in market applicability and low in price; the fly ash has stronger adsorptivity and dryness; the zinc powder foaming agent has strong pressure resistance, fast decomposability and good filling property, and can fill, stop leakage and prevent collapse; the aluminum hydroxide has good flame retardance, smoke generation is prevented, and toxic gases are adsorbed.
Further, the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:4.5-5.5:2.5-3.5:8-12:3.5-4.5:0.5-1.5.
Further, the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5:3:10:4:1.
further, the polymer solid fire extinguishing material comprises the following components: sodium chloride, magnesium dichloride and calcium dichloride; wherein the mass ratio of the sodium chloride to the magnesium dichloride to the calcium dichloride is 1:1.5-2.5:1.5-2.5.
The beneficial effect of adopting the further technical scheme is as follows: the sodium chloride is easy to dissolve in water, the decomposition is accelerated, and the stability is better; the magnesium dichloride has better curing property and can accelerate the curing conversion of water; the calcium dichloride has good freezing property and pressure resistance, and can accelerate the solidification conversion of water.
Further, the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the high molecular solid fire extinguishing material is 1:2:2.
the invention also provides a preparation method of the fire extinguishing material for the shallow goaf in the fire zone of the coal field, which comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(2) Adding inorganic fire-extinguishing material, fire-extinguishing solidification expansion material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for shallow goafs in the fire zone of the coal field.
The invention has the beneficial effects that: add the suspended sand granule after mixing loess and water, can make the suspended sand granule be in the suspension state for a long time, can increase the viscidity, the water retentivity and the permeability of mud mortar to when can avoiding carrying fire extinguishing material, the problem of pipeline jam.
The invention also provides application of the fire extinguishing material for the shallow goaf of the fire area of the coal field in fire extinguishing of the shallow goaf of the fire area of the coal field.
The invention has the following beneficial effects: the fire extinguishing material for the shallow goaf of the fire area of the coal field prepared by the invention is filled into the bottom plate of the shallow goaf of the fire area of the coal field through the sleeve, has better filling performance, flow performance and water retention performance, can quickly reduce the temperature of the fire area of the coal field, and effectively stops air flow, thereby preventing the shallow goaf of the fire area of the coal field from further burning, reducing the damage of the burning of the shallow goaf of the fire area of the coal field to the atmospheric environment, simultaneously saving the fire extinguishing material and reducing the fire extinguishing cost, and having remarkable social benefit and economic benefit for the treatment of the shallow goaf of the fire area of the coal field.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
Example 1:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material, 23 parts of fire extinguishing curing expansion material and 8 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire prevention and extinguishing material is 1:3:5; the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5:3:10:4:1; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the high molecular solid fire extinguishing material is 1:2:2.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high-molecular solid fire extinguishing material;
(3) Adding inorganic fire-extinguishing material, fire-extinguishing solidification expansion material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Example 2:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 25 parts of loess, 8 parts of water, 25 parts of suspended sand particles, 10 parts of inorganic fire prevention and extinguishing material, 15 parts of fire extinguishing curing expansion material and 5 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire prevention and extinguishing material is 1:2.5:5.5; the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:4.5:2.5:8:3.5:0.5; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the high molecular solid fire extinguishing material is 1:1.5:1.5.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and stirring uniformly to obtain mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high molecular solid fire extinguishing material;
(3) Adding inorganic fire-extinguishing material, fire-extinguishing solidification expansion material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Example 3:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 35 parts of loess, 12 parts of water, 50 parts of suspended sand particles, 20 parts of inorganic fire prevention and extinguishing material, 30 parts of fire extinguishing curing expansion material and 10 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire prevention and extinguishing material is 1:3.5:6.5; the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5.5:3.5:12:4.5:1.5; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the macromolecular solid fire extinguishing material is 1:2.5:2.5.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and stirring uniformly to obtain mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high molecular solid fire extinguishing material;
(3) Adding inorganic fire-extinguishing material, fire-extinguishing solidification expansion material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Comparative example 1:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material, 23 parts of fire extinguishing curing expansion material and 8 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:3:5; the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5:3:10:4:1; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the high molecular solid fire extinguishing material is 1:2:2.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Stirring loess, water and suspended sand particles uniformly to prepare mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high molecular solid fire extinguishing material;
(3) Adding inorganic fire-extinguishing material, fire-extinguishing solidification expansion material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Comparative example 2:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 23 parts of fire extinguishing curing expansion material and 8 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5:3:10:4:1; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the macromolecular solid fire extinguishing material is 1:2:2.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(2) Physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high molecular solid fire extinguishing material;
(3) And adding a fire extinguishing curing expansion material and a high polymer solid fire extinguishing material into the mud mortar, and uniformly stirring to obtain the fire extinguishing material for the shallow goaf of the fire zone of the coal field.
Comparative example 3:
a fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material and 8 parts of high polymer solid fire extinguishing material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:3:5; the mass ratio of sodium chloride, magnesium dichloride and calcium dichloride in the high molecular solid fire extinguishing material is 1:2:2.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and stirring uniformly to obtain mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing sodium chloride, magnesium dichloride and calcium dichloride to prepare a high molecular solid fire extinguishing material;
(3) Adding inorganic fire-extinguishing material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Comparative example 4
A fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material and 23 parts of fire extinguishing curing expansion material; wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:3:5; the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing curing expansion material is 1:5:3:10:4:1.
the preparation method of the fire extinguishing material for the shallow goaf of the fire zone of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(2) Physically mixing calcium silicate, diatomite and colloidal silica to prepare an inorganic fireproof material; physically mixing calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide to prepare a fire extinguishing curing expansion material;
(3) Adding inorganic fire-extinguishing material and fire-extinguishing solidifying expansion material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for the shallow goaf of the fire zone of the coal field.
Comparative example 5
A fire extinguishing material for a shallow goaf in a fire area of a coal field comprises the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 20 parts of fly ash, 10 parts of desulfurized gypsum, 10 parts of carbide slag and 2 parts of efficient dispersant.
The preparation method of the fire extinguishing material for the shallow goaf of the fire area of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(3) Adding fly ash, desulfurized gypsum, carbide slag and a high-efficiency dispersant into the mud mortar, and uniformly stirring to prepare the fire extinguishing material for the shallow goaf of the fire zone of the coal field.
Test examples
1. Flame retardancy
The fire extinguishing materials prepared in examples 1-3 and comparative examples 1-5 were subjected to an alcohol burner combustion test according to the test requirements related to the coal industry standard MT113-1995, and the ignition time, the flaming combustion time, and the flameless combustion time of the test specimens were used as indices to judge and evaluate the fire-retardant properties of the test specimens. The specific method comprises the following steps: and (3) putting the standard flame-retardant test sample in flame for burning, wherein the burning time of the sample is based on the burning of the sample, the shortest time is not less than 5s, and the longest time is not more than 90s, and after the sample is burnt, measuring the flaming burning time and the flameless burning time by using a stopwatch.
The results are shown in table 1, and it can be seen from table 1 that the average ignition time of the fire extinguishing material prepared by the invention is about 10s, the flameless combustion time is less than 5s, and is far lower than the combustion time in the flame retardant property specified by the standard of the safety production industry, which shows that the fire extinguishing material prepared by the invention completely meets the flame retardant property requirement of the fire extinguishing material in the shallow goaf of the coal field area, and simultaneously guarantees the fire protection purpose and the non-flammable characteristic of the fire extinguishing material.
2. Fluidity of the resin
The fire extinguishing materials prepared in examples 1 to 3 and comparative examples 1 to 5 were tested for fluidity of fire extinguishing materials using a cement slurry fluidity measuring device (a metal product having a truncated cone shape and a smooth inner wall without a contact seam) to verify the piping transportation ability. The specific detection method comprises the following steps: place the glass board on horizontal workbench, place survey device at glass board central authorities, glass board and survey device are inside all to be cleaned with wet cloth, then pour into the survey device with fire extinguishing material rapidly in, strike off and clear up the fire extinguishing material who spills over, in the experimentation, mention the survey device rapidly along vertical direction, observe the flow condition of fire extinguishing material on the glass board simultaneously, about 30s back, fire extinguishing material no longer diffuses on the glass board, at this moment, get straight chi and measure the flow diameter of fire extinguishing material, repeated cubic experiment, calculate the mean value of the flow diameter of fire extinguishing material, be the mobility of thick liquid promptly.
The test results are shown in table 1, and it can be seen from table 1 that the fluidity of the fire extinguishing material slurry prepared by the invention is greater than 20cm, which indicates that the fluidity is better, and the fire extinguishing material slurry can be smoothly transported to a fire area by adopting a pipeline during actual fire extinguishing.
3. Water retention rate
The fire extinguishing materials prepared in examples 1 to 3 and comparative examples 1 to 5 were tested for water retention by the following specific test methods: taking 10g of fire extinguishing material, detecting the water retention rate by using a thermogravimetric analyzer, setting the temperature to rise from 25 ℃ to 150 ℃, wherein the temperature rise rate is 3 ℃/min, recording the residual mass of the final fire extinguishing material, subtracting the mass of the fire extinguishing material after the experiment from the mass (10 g) of the fire extinguishing material before the beginning of the experiment to obtain the mass loss of the fire extinguishing material, and dividing the mass loss by the mass (10 g) of the fire extinguishing material before the beginning of the experiment to obtain the water retention rate.
The test results are shown in table 1, and it can be seen from table 1 that the fire extinguishing material prepared by the invention has a water retention rate of about 80%, which indicates that the fire extinguishing material has a good water retention rate, thereby effectively exerting a fire extinguishing effect when extinguishing fire.
TABLE 1 Performance parameters of fire extinguishing materials for shallow goafs in coal field fires
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A fire extinguishing material for a shallow goaf in a fire area of a coal field is characterized by comprising the following raw materials in parts by weight: 25-35 parts of loess, 8-12 parts of water, 25-50 parts of suspended sand particles, 10-20 parts of inorganic fire prevention and extinguishing material, 15-30 parts of fire extinguishing curing expansion material and 5-10 parts of high polymer solid fire extinguishing material;
the inorganic fire preventing and extinguishing material consists of the following components: calcium silicate, diatomaceous earth, and colloidal silica;
the fire extinguishing curing expansion material consists of the following components: calcium silicate, phosphogypsum, quicklime, fly ash, a zinc powder foaming agent and aluminum hydroxide;
the polymer solid fire extinguishing material comprises the following components: sodium chloride, magnesium dichloride and calcium dichloride; wherein the mass ratio of the sodium chloride to the magnesium dichloride to the calcium dichloride is 1:1.5-2.5:1.5-2.5;
the preparation method of the fire extinguishing material for the shallow goaf of the fire area of the coal field comprises the following steps:
(1) Mixing loess and water, adding the suspended sand particles, and uniformly stirring to obtain the mud mortar;
(2) Adding inorganic fire-extinguishing material, fire-extinguishing solidifying expanding material and high-molecular solid fire-extinguishing material into the mud mortar, and uniformly stirring to obtain the fire-extinguishing material for shallow goaf in fire zone of coal field.
2. The fire extinguishing material for the shallow goaf in the fire zone of the coal field as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 30 parts of loess, 10 parts of water, 40 parts of suspended sand particles, 15 parts of inorganic fire prevention and extinguishing material, 23 parts of fire extinguishing curing expansion material and 8 parts of high polymer solid fire extinguishing material.
3. The fire extinguishing material for the shallow goaf in the fire zone of the coal field as claimed in claim 1 or 2, wherein the particle size of the suspended sand particles is 1-2mm.
4. The fire extinguishing material for the shallow goaf in the fire zone of the coal field as claimed in claim 1, wherein the mass ratio of calcium silicate, diatomite and colloidal silica in the inorganic fire preventing and extinguishing material is 1:2.5-3.5:5.5-6.5.
5. The fire extinguishing material for the shallow goaf in the fire zone of the coal field as claimed in claim 1, wherein the mass ratio of calcium silicate, phosphogypsum, quicklime, fly ash, zinc powder foaming agent and aluminum hydroxide in the fire extinguishing solidified expanding material is 1:4.5-5.5:2.5-3.5:8-12:3.5-4.5:0.5-1.5.
6. Use of the fire extinguishing material for shallow goafs in a coal field fire according to any one of claims 1 to 5 for extinguishing fires in shallow goafs in a coal field fire.
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| CN112439152A (en) * | 2020-11-24 | 2021-03-05 | 赵建军 | Foaming filling reinforcing sealing material for coal field fire extinguishing grouting and application thereof |
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