CN104314613A - Method for filling top-coal falling region of coal mine by chemical grouting - Google Patents
Method for filling top-coal falling region of coal mine by chemical grouting Download PDFInfo
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- CN104314613A CN104314613A CN201410425396.4A CN201410425396A CN104314613A CN 104314613 A CN104314613 A CN 104314613A CN 201410425396 A CN201410425396 A CN 201410425396A CN 104314613 A CN104314613 A CN 104314613A
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- Prior art keywords
- filled
- region
- filling
- nitrogen
- coal
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 239000003245 coal Substances 0.000 title claims abstract description 19
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 55
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 51
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 47
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 21
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 45
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 16
- 238000007569 slipcasting Methods 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000003818 cinder Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 229910001629 magnesium chloride Inorganic materials 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001569 carbon dioxide Substances 0.000 abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 5
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 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
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000002301 combined effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000003063 flame retardant Substances 0.000 abstract 1
- 239000011440 grout Substances 0.000 abstract 1
- 229920002521 macromolecule Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- 238000006701 autoxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
-
- 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
- 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
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a method for filling a top-coal falling region of coal mine by chemical grouting. The method comprises the following steps: (1) spraying a region to be filled with a chlorate solution; (2) filling the region to be filled with nitrogen; (3) filling a filled region with grout, wherein an atomized sodium hydrogen carbonate solution is simultaneously sprayed to the upper parts of cavity regions to be filled in the grouting process in the step (3). According to the method, coal is subjected to inert treatment by spraying the region to be filled with the chlorate solution before grouting, so that the combustibility of the coal is reduced; gas and oxygen collected in the cavity regions are removed by nitrogen, so that the acceleration of the natural oxidation process of coal bodies under the combined effect of grouting heat and oxygen is avoided; the atomized sodium hydrogen carbonate solution is sprayed to the upper parts of the cavity regions to be filled in the grouting process, so that the temperature of filling bodies can be further reduced; moreover, sodium hydrogen carbonate can neutralize acidic substances in the filling bodies and generate carbon dioxide, so that the flame-retardant effect is further achieved.
Description
Technical field
The invention belongs to colliery chemical grouting field of engineering technology, relate to the method for chemical grouting filling colliery caving place.
Background technology
Top, colliery often occurs that coal cinder comes off or caves in, and forms cavity at top, and the coal cinder near these cavities loses support, easily continues to be caving; On the other hand, due to gas density, comparatively air is light, easily in caving place inner accumulated, occurs the hidden danger of gas explosion; Therefore, must repair the cavity at top, colliery in time.Because colliery caving place volume is comparatively large, and position is special, is not suitable for carrying out sealing by conventional concrete and fills.
Macromolecule obturator adds appropriate crosslinking agent, stabilizing agent and curing compound by multiple macromolecular compound through composite, reacts the slabstock foam be prefabricated under given conditions.Macromolecule obturator is generally obtained by base-material and catalyst mix, immediately foams after base-material and catalyst mix, and undergoes rapid expansion is to 15 ~ 30 times of initial volume, and expanded foam got final product setting and hardening in 2 minutes.Compared with ordinary concrete, macromolecule obturator has that curing rate is fast, quality is light, easy construction, good moldability advantage, colliery and tunnel airtight, coal petrography is empty and the filling of cracks in coal seam obtains and extensively uses.
But, because macromolecule obturator batch mixing expansion process can release a large amount of heats, if heat can not distribute in time, very likely accelerate residual spontaneous combustion of float in cavity, or as combustibles such as timber in cavity of directly igniting, even cause gas explosion or burning in cavity, and then cause severe safety accident.
Therefore, be necessary the method taking new chemical grouting filling colliery caving place, to eliminate the potential safety hazard that conventional construction method exists.
Summary of the invention
In view of this, the object of the present invention is to provide the method for a kind of chemical grouting filling colliery caving place.
For achieving the above object, the invention provides following technical scheme:
The method of chemical grouting filling colliery caving place, comprises the following steps:
1), with chlorate solution spraying region to be filled;
2), nitrogen is filled with to region to be filled;
3), slurry is injected to fill area;
Wherein, step 3) in slip casting process, spray the mixed solution of vaporific sodium bicarbonate solution, sodium carbonate liquor or sodium carbonate and sodium acid carbonate on hole region top to be filled simultaneously.
Preferably, the concrete steps of chemical grouting filling colliery of the present invention caving place method are as follows:
A), pretreatment region to be filled, remove the unstable coal cinder of hole region;
B), chlorate solution conveyor tube, nitrogen carrier pipe and filling paste carrier pipe are stretched into hole region inside and the base plate being used for supporting filling paste is set in empty bottom;
C), open chlorate solution conveyor tube, drench region to be filled with chlorate solution;
D), close chlorate solution conveyor tube and open nitrogen carrier pipe, getting rid of other gas in cavity with nitrogen;
E), filling paste carrier pipe is opened, to hole region conveying filling paste;
F), step e) carry out while, utilize chlorate solution conveyor tube to spray vaporific sodium bicarbonate solution to hole region top;
G), stop passing into slurry behind the complete filling cavity region of slurry;
H), the mixed solution passing into nitrogen, sodium bicarbonate solution, sodium carbonate liquor or sodium acid carbonate and sodium carbonate is stopped.
Preferred as chemical grouting filling colliery of the present invention caving place method, step 1) described chlorate solution is sodium chloride solution, its mass concentration is 5 ~ 27.5%, and spray rate is 1 ~ 10L/min.
Another kind as chemical grouting filling colliery of the present invention caving place method is preferred, step 2) rated operating pressure is 0.2 ~ 0.6MPa when being filled with nitrogen, after hole region nitrogen gas concn is higher than 97%, start step 3).
As chemical grouting filling colliery of the present invention caving place method further preferably, the mass concentration of described sodium bicarbonate solution is 3 ~ 14.5%, sodium carbonate liquor 6.54 ~ 30.36%, and during spray, flow is 1 ~ 10L/min.
Beneficial effect of the present invention is:
The method of chemical grouting filling colliery of the present invention caving place, first used chlorate solution spraying region to be filled, carries out inerting disposal with chlorate to coal before slip casting, reduced its autoxidation tendency; First get rid of with nitrogen the gas and oxygen that hole region assembles before slip casting of the present invention, avoid slip casting heat to cause combustible or gas combustion or blast, also reduce further the possibility of coal and oxygen catalytic combustion; In slip casting process of the present invention, spray vaporific sodium bicarbonate solution on hole region top to be filled, after contacting with obturator, its aqueous solvent can be absorbed heat in a large number simultaneously, reduce obturation temperature, in addition, also there is hydrolysis rapidly in sodium bicarbonate solution, in and obturator in acidic materials, heat absorption is release of carbon dioxide also, this can reduce obturation temperature on the one hand further, and on the other hand, the carbon dioxide of release also plays fire retardation further.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the work progress schematic diagram of chemical grouting filling colliery of the present invention caving place method:
In figure: 1-chlorate solution conveyor tube (sodium bicarbonate solution carrier pipe), 2-nitrogen carrier pipe, 3-filling paste carrier pipe, 4-cavity, 5-base plate, 6-coal.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Following examples, by the method for open a kind of chemical grouting filling colliery caving place, comprise the following steps:
1), with chlorate solution spraying region to be filled;
2), nitrogen is filled with to region to be filled;
3), slurry is injected to fill area;
Wherein, step 3) in slip casting process, spray the mixed solution of vaporific sodium bicarbonate solution, sodium carbonate liquor or sodium acid carbonate and sodium carbonate on hole region top to be filled simultaneously.
Embodiment 1:
The method of the present embodiment chemical grouting filling colliery caving place as shown in Figure 1, comprises the following steps:
A), pretreatment region to be filled, remove the unstable coal cinder of hole region;
B), chlorate solution conveyor tube 1, nitrogen carrier pipe 2 and filling paste carrier pipe 3 are stretched into empty 4 intra-zones and the base plate 5 being used for supporting filling paste is set in empty bottom;
C), open chlorate solution conveyor tube 1, drench region to be filled with chlorate solution;
D), close chlorate solution conveyor tube 1 and open nitrogen carrier pipe 2, getting rid of other gas in cavity 4 with nitrogen;
E), filling paste carrier pipe 3 is opened, to hole region conveying filling paste;
F), step e) carry out while, utilize chlorate solution conveyor tube 1 to spray vaporific sodium bicarbonate solution to hole region top; (embodiment part only needs to write one)
G), stop passing into slurry behind the complete filling cavity region of slurry;
H), stop passing into sodium bicarbonate solution;
I), after slip casting completes, change the pressure that passes into of nitrogen into about 0.2MPa, then continue to pass into 30 minutes.
Wherein:
Step 1) described chlorate solution is sodium chloride solution, its mass concentration is 20%, and spray rate is 5L/min;
Step 2) rated operating pressure is 0.4MPa when being filled with nitrogen, when starting step 3 after hole region nitrogen gas concn 97%);
The mass concentration of described sodium bicarbonate solution is 10%, and during spray, flow is 2L/min.
The method of chemical grouting filling colliery of the present invention caving place, first used chlorate solution spraying region to be filled, carries out inerting disposal with chlorate to coal 6 before slip casting, reduced its autoxidation tendency; First get rid of with nitrogen the gas and oxygen that hole region assembles before slip casting of the present invention, avoid slip casting heat to cause hole region combustible or gas combustion or blast, also reduce further the tendentiousness of coal 6 and oxygen catalytic oxidation; In slip casting process of the present invention, spray vaporific sodium bicarbonate solution on hole region top to be filled, after contacting with obturator, its aqueous solvent can be absorbed heat in a large number simultaneously, reduce obturation temperature, in addition, also there is hydrolysis rapidly in sodium bicarbonate solution, in and obturator in acidic materials, heat absorption is release of carbon dioxide also, this can reduce obturation temperature on the one hand further, and on the other hand, the carbon dioxide of release also plays fire retardation further.
It should be noted that, step 1) sodium chloride solution mass concentration is 5 ~ 27.5%, spray rate is 1 ~ 10L/min; Step 2) rated operating pressure is 0.2 ~ 0.6MPa when being filled with nitrogen, after hole region nitrogen gas concn is higher than 97%, start step 3); The mass concentration of sodium bicarbonate solution is 3 ~ 14.5%, all can realize object of the present invention when flow is 1 ~ 10L/min during spray.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (5)
1. the method for chemical grouting filling colliery caving place, is characterized in that, comprise the following steps:
1), with chlorate solution spraying region to be filled;
2), nitrogen is filled with to region to be filled;
3), slurry is injected to fill area;
Wherein, step 3) in slip casting process, spray the mixed solution of vaporific sodium bicarbonate solution, sodium carbonate liquor or sodium carbonate and sodium acid carbonate on hole region top to be filled simultaneously.
2. the method for chemical grouting filling colliery caving place according to claim 1, it is characterized in that, concrete steps are as follows:
A), pretreatment region to be filled, remove unstable coal cinder in hole region;
B), chlorate solution conveyor tube, nitrogen carrier pipe and filling paste carrier pipe are stretched into hole region inside and the base plate being used for supporting filling paste is set in empty bottom;
C), open chlorate solution conveyor tube, drench region to be filled with chlorate solution;
D), close chlorate solution conveyor tube and open nitrogen carrier pipe, getting rid of other gas in cavity with nitrogen;
E), filling paste carrier pipe is opened, to hole region conveying filling paste;
F), step e) carry out while, utilize chlorate solution conveyor tube to spray vaporific sodium bicarbonate solution to hole region top;
G), stop passing into slurry behind the complete filling cavity region of slurry;
H), the mixed solution passing into nitrogen and sodium bicarbonate solution, sodium carbonate liquor or sodium acid carbonate and sodium carbonate is stopped.
3. the method for chemical grouting filling colliery caving place according to claim 1, is characterized in that: step 1) described chlorate solution is sodium chloride, magnesium chloride, Klorvess Liquid, its mass concentration is 5 ~ 27.5%, and spray rate is 1 ~ 10L/min.
4. the method for chemical grouting filling colliery caving place according to claim 1, is characterized in that: step 2) rated operating pressure is 0.2 ~ 0.6MPa when being filled with nitrogen, after hole region nitrogen gas concn is higher than 97%, start step 3).
5. the method for chemical grouting filling colliery caving place according to claim 1, is characterized in that: the mass concentration of described sodium bicarbonate solution is 3 ~ 14.5%, sodium carbonate liquor 6.54 ~ 30.36%, and during spray, flow is 1 ~ 10L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425396.4A CN104314613B (en) | 2014-08-26 | 2014-08-26 | The method of chemistry grouting filling colliery caving place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425396.4A CN104314613B (en) | 2014-08-26 | 2014-08-26 | The method of chemistry grouting filling colliery caving place |
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| Publication Number | Publication Date |
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| CN104314613A true CN104314613A (en) | 2015-01-28 |
| CN104314613B CN104314613B (en) | 2016-06-01 |
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| CN201410425396.4A Active CN104314613B (en) | 2014-08-26 | 2014-08-26 | The method of chemistry grouting filling colliery caving place |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989618A (en) * | 2017-04-26 | 2017-07-28 | 贵州理工学院 | Cooling system inside large volume goaf filling body |
| CN109404041A (en) * | 2018-09-18 | 2019-03-01 | 闫红世 | A kind of filling vehicle backfilling coal cutting roadway |
| CN111271117A (en) * | 2019-05-03 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Polymer foaming material for coal mine airtight filling |
| CN111268941A (en) * | 2019-05-03 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Novel organic polymer double-liquid type grouting material for coal mine reinforcing coal rock mass |
| CN111734474A (en) * | 2020-07-05 | 2020-10-02 | 中国矿业大学(北京) | Method and equipment for preventing and treating fire in high-caving area of coal mine by curing deoxidized clay foam |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989618A (en) * | 2017-04-26 | 2017-07-28 | 贵州理工学院 | Cooling system inside large volume goaf filling body |
| CN109404041A (en) * | 2018-09-18 | 2019-03-01 | 闫红世 | A kind of filling vehicle backfilling coal cutting roadway |
| CN111271117A (en) * | 2019-05-03 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Polymer foaming material for coal mine airtight filling |
| CN111268941A (en) * | 2019-05-03 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Novel organic polymer double-liquid type grouting material for coal mine reinforcing coal rock mass |
| CN111734474A (en) * | 2020-07-05 | 2020-10-02 | 中国矿业大学(北京) | Method and equipment for preventing and treating fire in high-caving area of coal mine by curing deoxidized clay foam |
| CN111734474B (en) * | 2020-07-05 | 2022-05-20 | 中国矿业大学(北京) | Method and equipment for preventing and controlling fire in high-emergence area of coal mine by curing deoxidized clay foam |
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| Publication number | Publication date |
|---|---|
| CN104314613B (en) | 2016-06-01 |
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