CN103450441A - Double-bag foaming component for sealing gas extraction holes of coal mines - Google Patents
Double-bag foaming component for sealing gas extraction holes of coal mines Download PDFInfo
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- CN103450441A CN103450441A CN201310321735XA CN201310321735A CN103450441A CN 103450441 A CN103450441 A CN 103450441A CN 201310321735X A CN201310321735X A CN 201310321735XA CN 201310321735 A CN201310321735 A CN 201310321735A CN 103450441 A CN103450441 A CN 103450441A
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- 238000005187 foaming Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 19
- 238000000605 extraction Methods 0.000 title abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 10
- -1 polymethylene isocyanate Polymers 0.000 claims abstract description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims abstract description 5
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003063 flame retardant Substances 0.000 claims abstract description 4
- 235000011187 glycerol Nutrition 0.000 claims abstract description 4
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 4
- 239000000661 sodium alginate Substances 0.000 claims abstract description 4
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007731 hot pressing Methods 0.000 claims description 27
- 238000012856 packing Methods 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 4
- 230000008719 thickening Effects 0.000 claims description 4
- 239000012745 toughening agent Substances 0.000 claims description 4
- ZEMPKEQAKRGZGQ-AAKVHIHISA-N 2,3-bis[[(z)-12-hydroxyoctadec-9-enoyl]oxy]propyl (z)-12-hydroxyoctadec-9-enoate Chemical compound CCCCCCC(O)C\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CC(O)CCCCCC)COC(=O)CCCCCCC\C=C/CC(O)CCCCCC ZEMPKEQAKRGZGQ-AAKVHIHISA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 3
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004088 foaming agent Substances 0.000 abstract 2
- 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 abstract 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 abstract 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 235000019438 castor oil Nutrition 0.000 abstract 1
- 239000004359 castor oil Substances 0.000 abstract 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 abstract 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 abstract 1
- 239000010954 inorganic particle Substances 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 235000019794 sodium silicate Nutrition 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 239000002562 thickening agent Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a double-bag foaming component for sealing gas extraction holes of coal mines, which relates to a foaming agent. According to the double-bag foaming component disclosed by the invention, PIMG, glycerin, castor oil, sodium alginate, sodium silicate, a delay catalyst, a foaming stabilizer, a foaming agent, a flame retardant, a strengthening agent and hydroxyethyl cellulose form a material A, polyaryl polymethylene isocyanate, inorganic particles and a thickening agent form a material B, and due to the reasonable compositions, a gas extraction hole achieves a good sealing effect; through two bags, the material A and the material B are respectively placed in a material bag A (2) and a material bag B (5), so that when in use, the double-bag foaming component disclosed by the invention can be conveniently fixed on a gas extraction pipe due to bundling holes, thereby ensuring that the double-bag foaming component disclosed by the invention does not fall off.
Description
[technical field]
The present invention relates to a kind of whipping agent, especially relate to two bag foaming components for a kind of coal mine gas drainage holes sealing of hole.
[background technology]
Known, coal is that archaeophyte is imbedded in the solid combustible mineral that the underground complex biological that has experienced up to a million years is chemical and physicochemical change forms gradually, exploitation for coal is changed into heavy mechanical equipment exploited gradually by original manual type, be rich in a large amount of gas in rock stratum due to coal, gas exists with unbound state and sorption state in coal body; So the gas in coal need to be carried out to extraction, in order to reduce or stop the security incident in coal mining.
The drainage method of gas is mainly: before the exploitation coal road driving in colliery, penetrate coal seam from floor rock tunnel drilling, insert gas drainage pipe in boring and will seal around aperture, then utilize gas drainage pipe through the negative pressure of pumping plant, Gas recovery to gas pot to be recycled, but gas drainage pipe is very important to the sealing around entrance after inserting coal seam, this work is as well-done, and the gas drainage effect is all right.Because extraction is ahead of driving, back production, make mining work reduce the gas threat; Given this how shutoff, the method for using and material are just determining whether safety in the later stage exploitation to be; The shutoff that at present commercially available resin and catalyzer can be applied to gas extraction hole preferably, but during shutoff due to material composition, hardness and plugging effect are not good enough.
[summary of the invention]
In order to overcome the deficiency in background technology, the invention discloses two bag foaming components for a kind of coal mine gas drainage holes sealing of hole, the present invention utilizes reasonable component to make gas extraction hole obtain preferably plugging effect, and the packing hole on bag can guarantee that the present invention can not come off.
For achieving the above object, the present invention adopts following technical scheme:
Two bag foaming components for a kind of coal mine gas drainage holes sealing of hole, comprise two kinds of component contents of A and B, wherein in A material composition, comprises " according to weight percent ":
Polytetrahydrofuran ethoxylated polyhydric alcohol 25～30%
Glycerine 16～20%
Viscotrol C 15～18%
Sodium alginate 7～10%
Water glass 8～12%
Delayed catalyst 0.5～1.5%
Suds-stabilizing agent 2～3%
Whipping agent 1～3%
Fire retardant 3～5%
Toughener 1～3%
Natvosol 6～10%;
In B material composition, comprise " according to weight percent ":
Poly methylene poly phenyl poly isocyanate 70～80%
Inorganic particulate 20～28%
Thickening material 0.5～2%;
The bag of A material, B material being put into to disjunctor is stand-by.
Two bag foaming components for described coal mine gas drainage holes sealing of hole, described bag four limits form the space that holds in bag by the hot pressing bar respectively, hot pressing bar middle part on bag four limits is provided with the hot pressing bar, make in bag to form two by the hot pressing bar at middle part and independently hold space, one of them holds space is the A pocket, and another holds space is the B pocket.
Two bag foaming components for described coal mine gas drainage holes sealing of hole, be respectively equipped with outward extending extension edge in the hot pressing bar outside of bag both sides, is interval with respectively a plurality of packing holes on two extension edges.
Two bag foaming components for described coal mine gas drainage holes sealing of hole, described bag is for two-layer up and down, the hot pressing bar that two-layer bag forms by hot pressing is divided into independently space of two of A pocket and B pockets by bag, the outside surface of two-layer bag is layer of polyethylene terephthalate, middle part is nylon layer, polyester aluminium plating membrane, and opposite face is polyethylene layer.
Owing to having adopted technique scheme, the present invention has following beneficial effect:
Two bag foaming components for coal mine gas drainage holes sealing of hole of the present invention, the present invention utilizes reasonable component to make gas extraction hole obtain preferably plugging effect, by two bags, A material and B material are put into respectively to the A pocket, the B pocket, during use, utilize rope or iron wire to penetrate the packing hole on bag two extension edges, the present invention is bundled on gas drainage pipe, utilize both hands to exert pressure to A pocket and B pocket, hot pressing bar between A pocket and B pocket just can separate, make A pocket and B pocket connect, then put into gas extraction hole, through A material and the B material mixed, start to expand until by the complete shutoff of gas extraction hole, due to the special construction of bag of the present invention, make the present invention be fixed on gas drainage pipe and can not come off, effectively overcome the drawback of prior art.
[accompanying drawing explanation]
Fig. 1 is two bag structural representation of the present invention;
In figure: 1, bag; 2, A pocket; 3, packing hole; 4, hot pressing bar; 5, B pocket.
[embodiment]
Can explain in more detail the present invention by the following examples, the present invention is not limited to the following examples, discloses purpose of the present invention and is intended to protect all changes and improvements in the scope of the invention;
Two bag foaming components for coal mine gas drainage holes sealing of hole of the present invention, comprise two kinds of component contents of A and B, wherein in A material composition, comprises " according to weight percent ":
Polytetrahydrofuran ethoxylated polyhydric alcohol 25～30%
Glycerine 16～20%
Viscotrol C 15～18%
Sodium alginate 7～10%
Water glass 8～12%
Delayed catalyst 0.5～1.5%
Suds-stabilizing agent 2～3%
Whipping agent 1～3%
Fire retardant 3～5%
Toughener 1～3%
Natvosol 6～10%;
In B material composition, comprise " according to weight percent ":
Poly methylene poly phenyl poly isocyanate 70～80%
Inorganic particulate 20～28%
Thickening material 0.5～2%;
The bag 1 of A material, B material being put into to disjunctor is stand-by.
Delayed catalyst in above-mentioned A material composition can select 8154, because 8154 have and postpone to blow outbreak use, cream time is increased, can make the porous plastics finished product remain long-time, can not decay, and the characteristics such as the foam perforate is better, effectively guaranteed that foaming component does not foam in moment;
The Main Function that wherein adds suds-stabilizing agent is the emulsifying capacity improved between component, they can be mixed each other more effectively, simultaneously can also be in foaming process, the hierarchy of control has suitable surface tension, produce good bubble grid structure, and then the stable growth of promotion foam, prevent foam contraction and cracking etc.;
The Main Function that wherein adds toughener is to increase amount of filler in resin treatment, also can improve after filler more than resin tensile strength 50 ℅ simultaneously, elongation at break is more than 50 ℅, shock strength can increase by 80%, has effectively guaranteed that foaming component carries out shutoff to gas extraction hole preferably after foaming;
It is to prevent the filler precipitation that the thickening material added in above-mentioned B material composition will act on, and has guaranteed preferably the foaming effect of foaming component etc.
Two bag foaming components for coal mine gas drainage holes sealing of hole described in 1 by reference to the accompanying drawings, described bag 1 four limits form the space that holds in bag 1 by hot pressing bar 4 respectively, must guarantee that compacting firmly when the hot pressing bar 4 on compacting four limits, avoid bag 1 in transportation, store or rub in process and break, hot pressing bar 4 middle parts on bag 1 four limits are provided with hot pressing bar 4, made by the hot pressing bar 4 at middle part that bag 1 is interior to be formed two and independently hold space, one of them holds space is A pocket 2, another holds space is B pocket 5, it is so firm that the hot pressing bar 4 that wherein middle part arranges can not be suppressed as four limits in pressing process, must realize by rubbing A pocket 2 and B pocket 5 breaks through hot pressing bar 4 very easily, and then the foaming component in A pocket 2 and B pocket 5 is merged, further described bag 1 is for two-layer up and down, the hot pressing bar 4 that two-layer bag 1 forms by hot pressing is divided into independently space of 5 two of A pocket 2 and B pockets by bag 1, the outside surface of two-layer bag 1 is layer of polyethylene terephthalate, middle part is nylon layer, the polyester aluminium plating membrane, opposite face is for ease of the polyethylene layer of hot melt, further in hot pressing bar 4 outsides of bag 1 both sides, be respectively equipped with outward extending extension edge, be interval with respectively a plurality of packing holes 3 on two extension edges.
It should be noted that the two bag applicant separate case application described in the present invention, therefore will not tire out and state at this.
Implement two bag foaming components for coal mine gas drainage holes sealing of hole of the present invention, utilize reasonable component to make gas extraction hole obtain preferably plugging effect, specific implementation method is: by two bags, A material and B material are put into respectively to A pocket, B pocket, during use, after fully mixing with B pocket 5 interior foaming components in A pocket 2, utilize rope or iron wire to penetrate the packing hole 3 on 1 liang of extension edge of bag, then the present invention is bundled on gas drainage pipe; Perhaps by the unmixing bag 1 of foaming component, directly be bundled on gas drainage pipe, then utilize both hands to exert pressure to A pocket 2 and B pocket 5, hot pressing bar 4 between A pocket 2 and B pocket 5 just can separate, make A pocket 2 and B pocket 5 connect, then put into gas extraction hole, start to expand until by the complete shutoff of gas extraction hole through A material and the B material mixed; Due to the special construction of bag 1 of the present invention, make the present invention be fixed on gas drainage pipe and can not come off, effectively overcome the drawback of prior art.
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article in order to disclose purpose of the present invention, currently think suitablely, still, it is emphasized that the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and invention scope.
Claims (4)
1. two bag foaming components for a coal mine gas drainage holes sealing of hole, it is characterized in that: described foaming component comprises A and two kinds of component contents of B, wherein in A material composition, comprises " according to weight percent ":
Polytetrahydrofuran ethoxylated polyhydric alcohol 25～30%
Glycerine 16～20%
Viscotrol C 15～18%
Sodium alginate 7～10%
Water glass 8～12%
Delayed catalyst 0.5～1.5%
Suds-stabilizing agent 2～3%
Whipping agent 1～3%
Fire retardant 3～5%
Toughener 1～3%
Natvosol 6～10%;
In B material composition, comprise " according to weight percent ":
Poly methylene poly phenyl poly isocyanate 70～80%
Inorganic particulate 20～28%
Thickening material 0.5～2%;
The bag (1) of A material, B material being put into to disjunctor is stand-by.
2. two bag foaming components for coal mine gas drainage holes sealing of hole according to claim 1, it is characterized in that: described bag (1) four limit forms the space that holds in bag (1) by hot pressing bar (4) respectively, hot pressing bar (4) middle part on bag (1) four limit is provided with hot pressing bar (4), make to form two in bag (1) by the hot pressing bar (4) at middle part and independently hold space, one of them holds space is A pocket (2), and another holds space is B pocket (5).
3. two bag foaming components for coal mine gas drainage holes sealing of hole according to claim 2, it is characterized in that: hot pressing bar (4) outside in bag (1) both sides is respectively equipped with outward extending extension edge, is interval with respectively a plurality of packing holes (3) on two extension edges.
4. according to two bag foaming components for the described coal mine gas drainage holes sealing of hole of claim 2 or 3, it is characterized in that: described bag (1) is for two-layer up and down, the hot pressing bar (4) that two-layer bag (1) forms by hot pressing is divided into independently space of (5) two of A pocket (2) and B pockets by bag (1), the outside surface of two-layer bag (1) is layer of polyethylene terephthalate, middle part is nylon layer, polyester aluminium plating membrane, and opposite face is polyethylene layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310321735XA CN103450441A (en) | 2013-07-29 | 2013-07-29 | Double-bag foaming component for sealing gas extraction holes of coal mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310321735XA CN103450441A (en) | 2013-07-29 | 2013-07-29 | Double-bag foaming component for sealing gas extraction holes of coal mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103450441A true CN103450441A (en) | 2013-12-18 |
Family
ID=49733306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310321735XA Pending CN103450441A (en) | 2013-07-29 | 2013-07-29 | Double-bag foaming component for sealing gas extraction holes of coal mines |
Country Status (1)
| Country | Link |
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| CN (1) | CN103450441A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479650A (en) * | 2014-11-17 | 2015-04-01 | 宿州市金鼎安全技术服务有限公司 | Mine use hole packer hole packing material |
| CN105890477A (en) * | 2014-10-17 | 2016-08-24 | 中铁十六局集团第四工程有限公司 | Water pressure composite quick blocking method applied in drilling and blasting |
| CN109370515A (en) * | 2018-10-24 | 2019-02-22 | 中国矿业大学 | A kind of mucus-type pore sealing agent mixed with graded particles and its preparation and use method |
| CN111748071A (en) * | 2020-06-29 | 2020-10-09 | 武汉瑞法医疗器械有限公司 | Hydrophilic polyurethane foam dressing and preparation method thereof |
| CN114478982A (en) * | 2022-03-03 | 2022-05-13 | 西安科技大学 | Liquid retarding hole sealing material and preparation method thereof |
| CN114608399A (en) * | 2022-03-28 | 2022-06-10 | 嵩县金牛有限责任公司 | Portable hole sealing method for mine tunneling blasting |
| CN115838468A (en) * | 2022-11-30 | 2023-03-24 | 山西天地王坡煤业有限公司 | A kind of polymer composite foam material for plugging drilling hole in mine and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352225A (en) * | 2011-07-04 | 2012-02-15 | 周福宝 | Powder for plugging air leaking crack |
| WO2013015245A1 (en) * | 2011-07-25 | 2013-01-31 | 株式会社イノアックコーポレーション | Polyurethane foam |
| CN103113865A (en) * | 2013-03-07 | 2013-05-22 | 中国矿业大学 | Delaying foaming-type polymer sealing material for mining |
-
2013
- 2013-07-29 CN CN201310321735XA patent/CN103450441A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352225A (en) * | 2011-07-04 | 2012-02-15 | 周福宝 | Powder for plugging air leaking crack |
| WO2013015245A1 (en) * | 2011-07-25 | 2013-01-31 | 株式会社イノアックコーポレーション | Polyurethane foam |
| CN103113865A (en) * | 2013-03-07 | 2013-05-22 | 中国矿业大学 | Delaying foaming-type polymer sealing material for mining |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105890477A (en) * | 2014-10-17 | 2016-08-24 | 中铁十六局集团第四工程有限公司 | Water pressure composite quick blocking method applied in drilling and blasting |
| CN105890477B (en) * | 2014-10-17 | 2019-02-05 | 中铁十六局集团第四工程有限公司 | A hydraulic composite fast plugging method for drilling and blasting |
| CN104479650A (en) * | 2014-11-17 | 2015-04-01 | 宿州市金鼎安全技术服务有限公司 | Mine use hole packer hole packing material |
| CN109370515A (en) * | 2018-10-24 | 2019-02-22 | 中国矿业大学 | A kind of mucus-type pore sealing agent mixed with graded particles and its preparation and use method |
| CN111748071A (en) * | 2020-06-29 | 2020-10-09 | 武汉瑞法医疗器械有限公司 | Hydrophilic polyurethane foam dressing and preparation method thereof |
| CN111748071B (en) * | 2020-06-29 | 2022-03-01 | 武汉瑞法医疗器械有限公司 | Hydrophilic polyurethane foam dressing and preparation method thereof |
| CN114478982A (en) * | 2022-03-03 | 2022-05-13 | 西安科技大学 | Liquid retarding hole sealing material and preparation method thereof |
| CN114608399A (en) * | 2022-03-28 | 2022-06-10 | 嵩县金牛有限责任公司 | Portable hole sealing method for mine tunneling blasting |
| CN114608399B (en) * | 2022-03-28 | 2023-09-08 | 嵩县金牛有限责任公司 | Portable hole sealing method for mine tunneling blasting |
| CN115838468A (en) * | 2022-11-30 | 2023-03-24 | 山西天地王坡煤业有限公司 | A kind of polymer composite foam material for plugging drilling hole in mine and preparation method thereof |
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Application publication date: 20131218 |