CN102493840A - Method for filling underground spaces and system for filling underground spaces - Google Patents
Method for filling underground spaces and system for filling underground spaces Download PDFInfo
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- CN102493840A CN102493840A CN2011104200183A CN201110420018A CN102493840A CN 102493840 A CN102493840 A CN 102493840A CN 2011104200183 A CN2011104200183 A CN 2011104200183A CN 201110420018 A CN201110420018 A CN 201110420018A CN 102493840 A CN102493840 A CN 102493840A
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Abstract
The invention provides a method for filling underground spaces, which comprises steps of extracting sewage from an underground gasification cavity to be delivered into a settling basin to be purified; mixing the purified water with crushed solid pulping raw materials to form pulp; and filling the pulp into the underground spaces and drying the pulp. The invention further provides a system for filling underground spaces, which comprises a water pump, a settling basin, a water injection system and a pulp injection device, the water pump extracts sewage from an underground gasification cavity, the settling basin purifies the sewage, and is provided with a purified water outlet and a sewage inlet, purified water flows out via the purified water outlet, the sewage inlet is communicated with an outlet of the water pump, the water injection system is provided with a water delivery pipe, the water delivery pipe is provided with a water outlet and a water inlet communicated with the purified water outlet of the settling basin, the pulp injection device is provided with a material supply opening, a water supply opening and a delivery device, crushed solid pulping raw materials enter the material supply opening, the water supply opening is communicated with the water outlet, and pulp mixed by the solid pulping raw materials and the purified water is delivered to an underground space by the delivery device. On the one hand, risks of pollution of underground water are reduced, and on the other hand, risks that soil on the earth surface is polluted are reduced.
Description
Technical field
The present invention relates to a kind of method of filling the underground space, in order to fill the system of the underground space.
Background technology
In the underground coal gasification(UCG) process, along with the continuous development of burning face, underground meeting forms combustion dead zone, large-area coal seam; After gasifier operation perhaps closed stove, in the combustion dead zone the continuous circumference unreacted of heat meeting coal seam, thereby makes the coal seam that dry distillation reactor take place; Produce a large amount of tar and organic matter, these organic matters are brought in the combustion dead zone through infiltration around the coal seam, form underground sewage; Then have influence on underground reservoir, infiltration also can make the water in the aquifer polluted for a long time; The expansion of combustion dead zone also can cause the supporting intensity of upper strata rock top board to descend; Go down for a long time also can cause top board to subside; The water in aquifer leaks into the combustion dead zone and causes water pollution or put out by water just at operating gasification furnace on the one side; Can cause the depression on the face of land on the other hand, the upper strata surface structures is caused potential safety hazard.
In the underground gasification furnace running; Can produce a large amount of sewage; At present these sewage can directly be disposed to ground or carry out some simple processing after being extracted into ground through catch pits, but the secondary water after handling again still can not reach drinking water or safe water quality standard, and these water drain on every side in waters or the soil; Still can cause the pollution of waters or soil, influence the surrounding enviroment protection.
Prior art one: US4,323,122 pairs of pollutants have carried out extracting and have utilized; But this method only is applicable to the leakage of underground pollution thing or other to the less demanding situation of water content, and is inapplicable under the situation of a large amount of waters in underground gasification combustion dead zone, and a large amount of water causes underground gasification district temperature just at work to descend; Even can put flame front out by water; Of the influence of underground water burst can not be solved,, also Total Water will be reduced so not only will reduce organic content in the gasification zone to gasification furnace.
Prior art two: US4,832,122 have introduced a kind of underground water original position repair system, beat to the contaminated area and inject well and extraction well.Inject well and inject air, other gas or liquid, impel the volatile organic matter volatilization, discharge from extraction well then, filter to ground, burning, atmosphere diffuse.CN101381149A has introduced a kind of underground water original position repair system, and this technology is passed into combustion dead zone water bottom to hydrogen peroxide solution through discarded gasification furnace boring, and the phenols oxidation Decomposition in the water body is become carbon dioxide and water.But this original position recovery system can only reduce the volatile organic matter in the sewage; Further do not handle for other pollutants; And the existence of negative pressure can make upper water constantly leak into the combustion dead zone in the combustion dead zone; Pollutant also can move along with flowing of water, causes phreatic further pollution.
Prior art three: US5287926 has introduced the problems such as roof collapse of avoiding firing the dead zone to refuses such as combustion dead zone filling silt, slag, coal ash; But the half-edge coal seam that is filled in of solid pulping raw material is suitable for; Solid mineral can not cause and block up near the filler pipeline through fill up the combustion dead zone from sedimentation in horizontal coal seam, skewness in the combustion dead zone; Top board does not obtain strong supporting, so this technology can not comprehensively solve the problem of underground combustion dead zone top plate inbreak.
Prior art four: CN101021161A has introduced a kind of usefulness and has transported the earth-filling method in the goaf of mining system, mainly to the tunnel well-digging, in the tunnel, inserts mixed slurry through conveyance conduit; Through concussion slurry is evenly distributed, reaches the purpose of supporting roof after the drying, but this Technology Need is introduced water source on the ground in a large number; Make slurry become liquid form; Not only cause a large amount of wastes of ground drinking water, also can in the underground gasification system, introduce extra moisture, influence the carrying out of gasification.
Therefore, how to reduce environment pollution and surface subsidence influence, realize that the sustainable development of underground original position gasification becomes present emphasis and difficult point peripheral masses' productive life.
Summary of the invention
To the problem that exists in the correlation technique; The object of the present invention is to provide a kind of method of filling the underground space, in order to fill the system of the underground space; Can reduce the risk of groundwater pollution at least on the one hand, reduce the contaminated risk of surface soil on the other hand.
Be to realize above-mentioned purpose, the invention provides a kind of method of filling the underground space on the one hand, comprising: extract sewage from underground gasification combustion dead zone and send into the settling tank and purify; The water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; And slurry is packed into the underground space and carries out dried.
Preferably, the underground space and underground gasification combustion dead zone are the same space, and the sewage that extracts from underground gasification combustion dead zone is backfilled to this underground gasification combustion dead zone after becoming slurry; Perhaps, the underground space is the target fill area of isolating fully with underground gasification combustion dead zone, and the target fill area is underground goaf or another underground gasification combustion dead zone.
Preferably, be that the same space and underground gasification fire under the situation that is gasifying the dead zone in the underground space and underground gasification combustion dead zone, method also comprises: before filling paste, inject water uptake expansion material along the direction that deviates from flame zone in the underground combustion dead zone
Wherein, The water uptake expansion material that this edge deviates from the direction injection of flame zone in the underground combustion dead zone absorbs the sewage that underground gasification fires the dead zone; After water uptake expansion material expands and in underground combustion dead zone, is partitioned into the insulating space of isolating with flame zone, just in insulating space, carry out this slurry and fill.
Preferably, the inventive method also comprises: before carrying out this slurry filling and after injecting water uptake expansion material, the water after purifying is sent in the underground space water after the purification that the water uptake expansion material absorption infeeds and the sewage in the underground space.
Preferably, in carrying out the process that slurry fills, in injected hole, feed gas-pressurized off and on the slurry after the injection is evenly distributed in the underground space, wherein injected hole is: the perforate that penetrates the top board connection underground space of the underground space.
Preferably, feeding gas-pressurized off and on is: whenever at a distance from air blast half an hour once, the wind that is blasted is forced air in the process of filling paste.
Preferably, according to the step purge sewage that carries out successively as follows: sewage is carried out natural subsidence in settling tank, make organic oils, water and mud layering; Organic oils after the layering is discharged from settling tank; In settling tank, drop into magnesia and phosphoric acid and hydrophosphate, the mol ratio of magnesium, nitrogen, phosphorus is 1.3: 1: 1, and per three hours sampling and measuring ammonia nitrogen concentrations are more than 90% until ammonia nitrogen removal frank; Add strong oxidizer CIO
2, addition is phenol concentration (the phenol concentration in the waste water) and CIO
2Concentration ratio 1: 3.0-1: 3.5, per three hours sampling and measuring volatile phenol contents, phenol concentration clearance is more than 90% in sewage; Regulate the pH value of sewage, be 6.5-7.5.
Preferably, the time of natural subsidence is 1-2 hour.
Preferably, the solid pulping raw material of pulverizing is cement, sandy soil, broken spoil, polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.
Preferably, the solid pulping raw material of pulverizing is cement, sandy soil, broken spoil, polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation; Water uptake expansion material is polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.
Preferably, the slurry of the underground space supports the top board of the underground space after being dried.
Preferably, the underground space is in underground horizontal coal seam.
The present invention provides a kind of in order to fill the system of the underground space on the other hand, comprising: the suction pump that extracts sewage from underground gasification combustion dead zone; To the settling tank that sewage purifies, have treated water outlet that water flows out after supplying to purify and the sewage inlet that is communicated with the pump discharge of suction pump; Flood pattern with water pipeline, the water inlet that this water pipeline has delivery port and is communicated with the treated water outlet of settling tank; The slurry injection device has the inlet that solid pulping raw material that supply to pulverize gets into, the feed water inlet that is communicated with the delivery port of water pipeline and the solid pulping raw material and the composite slurry of purifying waste water is delivered to the conveyer in the underground space.
Preferably, the underground space is this underground gasification combustion dead zone, and system also comprises: the injected system of in underground gasification combustion dead zone, injecting water uptake expansion material; And with the aqueduct in the water introducing underground gasification combustion dead zone after purifying in the settling tank, water uptake expansion material absorbs from what aqueduct was introduced purifying waste water.
Preferably, conveyer is a helical conveyor.
Useful technique effect of the present invention is:
First; The present invention processes slurry with the solid pulping raw material of pulverizing after extracting the underground sewerage treatment in the underground gasification combustion dead zone; Say then to slurry to be filled into the underground space (target packing space), reduce the risk of groundwater pollution on the one hand, reduce the contaminated risk of surface soil on the other hand.
Second; The present invention carries out the sewage that extracts earlier the natural subsidence layering, removes organic oil, adds preparation to sewage clarification then; It has fully utilized the water technology of physics and chemistry, and is easy and simple to handle and effective, has avoided extensive biochemical treatment and expense that the cleaning equipment that produces is correlated with; And the settling tank floor space is little, and the water treatment cycle period is short.
The 3rd; The present invention processes slurry with purifying waste water of sewage generation in the settling tank and is filled into the underground space; Reduced on the one hand, reduced the purified water that settling tank the is discharged pollution that surface soil causes of being rivals in a contest of running on the other hand purify the correlative charges of generation once more from purifying waste water of settling tank.
The 4th; The present invention carries out drying to the slurry that is filled into the underground space; Comprised the for example comminuted solids pulping raw material of cement, sandy soil, broken spoil owing to form the raw material of slurry, therefore dried slurry plays support action to top board, avoids subsiding of top board to cause the sinking on the face of land on the one hand; Avoid negative pressure to make underground water flow into underground gasification combustion dead zone on the other hand, cause phreatic continuation to pollute.
The 5th; Be that the same space and this underground gasification combustion dead zone are when gasifying in target packing space and the underground gasification combustion dead zone of extracting sewage; The present invention fills water uptake expansion material along the direction that deviates from flame zone in the underground gasification combustion dead zone; Water uptake expansion material is blocked the part passage of the underground space after imbibition, this moment, water uptake expansion material was partitioned into the insulating space of isolating with flame zone in underground gasification combustion dead zone, in this insulating space, carried out slurry and injected; Realized when not influencing the place ahead flame face; The combustion dead zone at backfill flame zone rear makes the gasification in the underground gasification combustion dead zone and purifies and carries out simultaneously, has realized that the sustainability of underground gasification is carried out.
Description of drawings
Fig. 1 is the flow chart that the present invention fills the embodiment 1 of underground space method;
Fig. 2 is the flow chart that the present invention fills the embodiment 2 of underground space method.
The specific embodiment
The method that the present invention fills the underground space comprises: extract sewage from underground gasification combustion dead zone and send into the settling tank and purify; The water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; This slurry is packed into the said underground space and carries out dried.The described underground space is the target fill area, and this target fill area can be described underground gasification combustion dead zone, also can be another underground gasification combustion dead zone or the underground goaf that isolates fully with this underground gasification combustion dead zone.
[embodiment 1]
Below referring to accompanying drawing 1 embodiment 1 of the inventive method is described, in this embodiment 1, the target fill area is a same space with the underground gasification combustion dead zone of extracting sewage; And gasify in this underground gasification combustion dead zone; This moment, the inventive method comprised the steps: that the underground sewage that underground gasification is fired in the dead zone is extremely aboveground through sewage extraction line (catch pit or venthole) 7 extractings, transported settling tank 4 to through transport pipeline and purified, and contained a large amount of mud, organic oils and multiple hazardous trace elements in this sewage; Oil content 400-700mg/L wherein; Volatile phenol 1500-2000mg/L, ammonia nitrogen 600-900mg/L, pH value is about 9.Sewage to extracting out carries out purified treatment; Particularly; At first through 1-2 days natural subsidence, make organic oils, water and mud layering (one by one corresponding to oil reservoir, water layer, mud among Fig. 1) in the sewage, organic oils as shown in Figure 1 is at top layer; Get rid of organic oils through oil-drain pipe (being connected the oil drain out 103 of settling tank place), collect organic oils and wait for processing and utilizing again corresponding to organic oils; Second step, in settling tank, drop into magnesium compound and phosphoric acid and hydrophosphate in the sewage, the mol ratio of magnesium, nitrogen, phosphorus is 1.3: 1: 1, per three hours sampling and measuring ammonia nitrogen concentrations are more than 90% until ammonia nitrogen removal frank; In the 3rd step, add strong oxidizer CIO
2, addition is phenol concentration (phenol concentration in the sewage) and CIO
2Concentration ratio 1: 3.0-1: 3.5, per three hours sampling and measuring volatile phenol contents, phenol concentration clearance is more than 90% in sewage; In the 4th step, the pH value of adjusting sewage is 6.5-7.5.Through above processing procedure; Reclaim the organic oils in the sewage, solid impurities such as mud are deposited to the bottom, extract the pretreated water in middle part (water after promptly being cleaned in the settling tank again) through line transportation to slurry injection device; In the slurry injection device, be mixed into slurry with the solid pulping raw material of pulverizing; Then slurry being packed in this underground gasification combustion dead zone 3, in brief, is with carrying out original position backfill combustion dead zone after the sewerage treatment.For fear of the place ahead flame zone (Fig. 1 shows the flame front of the place ahead flame zone) that influences in the underground gasification combustion dead zone; At first inject imbibition property material to this underground combustion dead zone; Injection direction is flame zone (being combustion dead zone, rear direction) in the other direction; Can find out also that from Fig. 1 this injection direction is the direction that deviates from flame zone, it is to pass through pipeline at the well head 2 nearest apart from flame zone to inject imbibition property material, second step that Fig. 1 also shows; (this secondary water purification is from the water after being cleaned in the settling tank to spray into a small amount of secondary water purification through the rear well head 1 far away slightly apart from flame zone; Purifying waste water of slurry is identical with supporting), wait for for example 12-24 hour, treat that imbibition property material expands behind underground absorption combustion dead zone sewage and the secondary water purification that sprays into; Thereby block combustion dead zone part passage, be partitioned into the insulating space of isolating in this combustion dead zone with flame zone; The 3rd step; The sewage of handling is fully mixed with solid pulping raw materials such as the cement of pulverizing, sandstone; Pour into slurry injection device 5 and be backfilled to above-mentioned insulating space (this insulating space is the zone at flame zone rear in the underground gasification combustion dead zone among Fig. 1), in the process of backfill combustion dead zone, to well head 1 (this moment is as grouting port) feeding gas-pressurized intermittently through pressurization well head 1; Slurries can not blocked up at well head; Be evenly distributed in the combustion dead zone, feed gas-pressurized in the practical application discontinuous and can be: every slip casting air blast half an hour once, this wind that blasts can be that air also can be other gases.At last, through for example blasting gas such as air the slurries that inject are carried out drying, at dry rear enclosed gasification furnace, wherein the slurry top board that after being dried, supports the underground space prevents to subside.Obviously can find out that from Fig. 1 well head 2 is the perforates that penetrate this underground gasification combustion dead zone top plate, wherein also indicates subterranean coal with label 6, the soil pipe of purifying waste water and drawing of collecting oil pipe that organic oils uses, sewage in the settling tank being produced.
Comprised the step of purifying waste water in the settling tank being introduced underground gasification combustion dead zone in the foregoing description 1; But this step is not necessary; For example absorbing in the combustion dead zone sewage metapedes to form described insulating space when water uptake expansion material; Then this step can be omitted, otherwise then this step need be increased.Further, when in settling tank, sewage being carried out natural subsidence, the time also decides as the case may be, as long as can be with organic oils, water, mud layering.
In addition; Although what describe in the foregoing description 1 is that this underground gasification fires the situation of filling under the situation that is gasifying dead zone; But should be appreciated that; Underground gasification combustion dead zone method of the present invention for discarded also is suitable for, and does not just have the problem that influences flame zone in the underground gasification combustion dead zone, and can not have the step of dry slurry rear enclosed gasification furnace.
As a kind of optimal way, the underground gasification combustion dead zone that relates in the present embodiment 1 can be formed in the underground space in the horizontal coal seam.
[embodiment 2]
Below referring to accompanying drawing 2 embodiment 2 of the inventive method is described, different with embodiment 1 is:
(1) the target fill area is not a same space with the underground gasification combustion dead zone of extracting sewage in the present embodiment 2; In brief; Embodiment 2 extracts sewage from a underground gasification combustion dead zone; To after the sewerage treatment water purification after the sewage clarification being processed slurry, slurry is sent in another underground gasification combustion dead zone;
(2) and the target fill area also can be underground goaf, the underground goaf of for example taking the ore deposit outside the coal to form.
(3) step of injecting water uptake expansion material among the embodiment 1 can be adopted, also this step can be do not adopted.
Except that above-mentioned (1)-(3), embodiment 2 remainders are identical with embodiment 1, repeat no more here.
In embodiment 1 and 2; Obviously sewerage treatment all is to carry out in the outside of the underground gasification combustion dead zone of extracting sewage; No matter produce slurry or direct the introducing in the target fill area, used water is all from settling tank, purifying waste water by generation after wherein sewage is cleaned.The present invention does not purify purifying waste water once more.
To sum up, the inventive method obtains following useful technique effect:
First; The present invention processes slurry with the solid pulping raw material of pulverizing after extracting the underground sewerage treatment in the underground gasification combustion dead zone; Say then to slurry to be filled into the underground space (target packing space), reduce the risk of groundwater pollution on the one hand, reduce the contaminated risk of surface soil on the other hand;
Second; The present invention carries out the sewage that extracts earlier the natural subsidence layering, removes organic oil, adds preparation to sewage clarification then; It has fully utilized the water technology of physics and chemistry, and is easy and simple to handle and effective, has avoided extensive biochemical treatment and expense that the cleaning equipment that produces is correlated with; And the settling tank floor space is little, and the water treatment cycle period is short;
The 3rd; The present invention processes slurry with purifying waste water of sewage generation in the settling tank and is filled into the underground space; Reduced on the one hand, reduced the purified water that settling tank the is discharged pollution that surface soil causes of being rivals in a contest of running on the other hand purify the correlative charges of generation once more from purifying waste water of settling tank.
The 4th; The present invention carries out drying to the slurry that is filled into the underground space; Comprised the for example comminuted solids pulping raw material of cement, sandy soil, broken spoil owing to form the raw material of slurry, therefore dried slurry plays support action to top board, avoids subsiding of top board to cause the sinking on the face of land on the one hand; Avoid negative pressure to make underground water flow into underground gasification combustion dead zone on the other hand, cause phreatic continuation to pollute.
The 5th; Be that the same space and this underground gasification combustion dead zone are when gasifying in target packing space and the underground gasification combustion dead zone of extracting sewage; The present invention fills water uptake expansion material along the direction that deviates from flame zone in the underground gasification combustion dead zone; Water uptake expansion material is blocked the part passage of the underground space after imbibition, this moment, water uptake expansion material was partitioned into the insulating space of isolating with flame zone in underground gasification combustion dead zone, in this insulating space, carried out slurry and injected; Realized when not influencing the place ahead flame face; The combustion dead zone at backfill flame zone rear, making in the underground gasification combustion dead zone should be that gasification, purification, backfill are carried out simultaneously, has realized that the sustainability of underground gasification is carried out.
On the other hand, it is a kind of in order to fill the system of the underground space (target packing space) that the present invention also provides, and referring to Fig. 1 and Fig. 2, it comprises: the suction pump that extracts sewage from underground gasification combustion dead zone; To the settling tank 4 that sewage purifies, this settling tank 4 has treated water outlet 101 that supplies the water outflow of purification back and the sewage inlet 102 that is communicated with the pump discharge of this suction pump; The water inlet that flood pattern with water pipeline, this water pipeline have delivery port and be communicated with the treated water outlet 101 of settling tank; The slurry injection device has the inlet that solid pulping raw material that supply to pulverize gets into, the feed water inlet that is communicated with the delivery port of water pipeline and this solid pulping raw material and this composite slurry of purifying waste water is delivered to the conveyer in the underground space.This underground space is a same space with the underground gasification combustion dead zone of extracting sewage; Perhaps this underground space is the target fill area of isolating fully with the underground gasification combustion dead zone of extracting sewage, and the target fill area is underground goaf or another underground gasification combustion dead zone; And when relating to underground gasification combustion dead zone, it both can be that the space of discarding also can be the space of gasifying.
Can find out also that from Fig. 1 when the target packing space was the same space with the underground gasification combustion dead zone of extracting sewage, system of the present invention also comprised: the injected system of in this underground gasification combustion dead zone, injecting water uptake expansion material; And the water after purifying in the settling tank introduced aqueduct in this underground gasification combustion dead zone (draw purify waste water from the position of the soil pipe shown in Fig. 1), the water uptake expansion material of injection absorbs from purifying waste water of introducing of aqueduct and fires dead zone sewage.Can find out also that from Fig. 1 and Fig. 2 the conveyer of slurry injection device is preferably helical conveyor among the present invention.
The solid pulping raw material of all pulverizing that relate to of the present invention is: cement, sandy soil, broken spoil, polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.Related water uptake expansion material is: polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.
Device of the present invention can embodiment of the present invention method, and when implementing this method, obtained the corresponding techniques effect.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a method of filling the underground space is characterized in that, comprising:
Extract sewage sends into the settling tank and purifies from underground gasification combustion dead zone;
The water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; And
Said slurry is packed into the said underground space and carries out dried.
2. the method for the filling underground space according to claim 1 is characterized in that,
The said underground space and said underground gasification combustion dead zone are the same space, and the sewage that extracts from said underground gasification combustion dead zone is backfilled to this underground gasification combustion dead zone after becoming slurry; Perhaps,
The said underground space is the target fill area of isolating fully with said underground gasification combustion dead zone, and said target fill area is underground goaf or another underground gasification combustion dead zone.
3. the method for the filling underground space according to claim 1 is characterized in that,
In the said underground space and said underground gasification combustion dead zone is that the same space and said underground gasification fire under the situation that is gasifying the dead zone; Said method also comprises: before filling paste; Inject water uptake expansion material along the direction that deviates from flame zone in the said underground combustion dead zone; Wherein, Said water uptake expansion material absorbs the sewage in the said underground gasification combustion dead zone, after said water uptake expansion material expands and in said underground combustion dead zone, is partitioned into the insulating space of isolating with said flame zone, just in said insulating space, carries out described slurry and fills.
4. the method for the filling underground space according to claim 3 is characterized in that, also comprises:
Before carrying out described slurry filling and after injecting said water uptake expansion material, the water after the said purification is sent in the said underground space,
Wherein, said water uptake expansion material absorbs water and the sewage in the said underground space after the said purification that infeeds.
5. according to the method for each said filling underground space among the claim 1-4, it is characterized in that,
In carrying out the process that slurry fills, in injected hole, feed gas-pressurized off and on the slurry after the injection is evenly distributed in the said underground space,
Wherein said injected hole is: the top board that penetrates the said underground space is communicated with the perforate of the said underground space.
6. according to the method for the said filling underground space of claim 5, it is characterized in that,
The described gas-pressurized that feeds off and on is: whenever at a distance from air blast half an hour once, the wind that is blasted is forced air in the process of filling paste.
7. according to the method for each described filling underground space among the claim 1-4, it is characterized in that, according to the said sewage of step purge that carries out successively as follows:
Said sewage is carried out natural subsidence in settling tank, make organic oils, water and mud layering;
Organic oils after the layering is discharged from settling tank;
In said settling tank, drop into magnesia and phosphoric acid and hydrophosphate, the mol ratio of magnesium, nitrogen, phosphorus is 1.3: 1: 1, and per three hours sampling and measuring ammonia nitrogen concentrations are more than 90% until ammonia nitrogen removal frank;
Add strong oxidizer CIO
2, addition is phenol concentration and CIO in the sewage
2Concentration ratio 1: 3.0-1: 3.5, per three hours sampling and measuring volatile phenol contents, phenol concentration clearance is more than 90% in sewage;
Regulate the pH value of sewage, be 6.5-7.5.
8. the method for the filling underground space according to claim 6 is characterized in that, the time of said natural subsidence is 1-2 hour.
9. the method for the filling underground space according to claim 1; It is characterized in that the solid pulping raw material of said pulverizing is cement, sandy soil, broken spoil, polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.
10. according to the method for the claim 3 or the 4 described filling underground spaces, it is characterized in that,
The solid pulping raw material of said pulverizing is cement, sandy soil, broken spoil, polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation;
Said water uptake expansion material is polyacrylate, polyvinyl alcohol, polyoxygenated alkanes, inorganic polymer class, starch-grafted, carboxymethylated starch, organic phosphate starch, starch xanthate, cellulose graft, carboxy methylation cellulose, hydroxypropylation cellulose, the cellulosic combination in any of xanthogenation.
11. the method according to each said filling underground space among the claim 1-4 is characterized in that the slurry of the said underground space supports the top board of the said underground space after being dried.
12. the method according to each said filling underground space among the claim 1-4 is characterized in that, the said underground space is in underground horizontal coal seam.
13. the system in order to the filling underground space is characterized in that, comprising:
Extract the suction pump of sewage from underground gasification combustion dead zone;
To the settling tank that sewage purifies, have the treated water outlet of the water outflow after supplying to purify and the sewage inlet that is communicated with the pump discharge of said suction pump;
Flood pattern with water pipeline, the water inlet that this water pipeline has delivery port and is communicated with the treated water outlet of said settling tank;
The slurry injection device has the inlet that solid pulping raw material that supply to pulverize gets into, the feed water inlet that is communicated with the delivery port of said water pipeline and said solid pulping raw material and the said composite slurry of purifying waste water is delivered to the conveyer in the said underground space.
14. system according to claim 13 is characterized in that, the said underground space is described underground gasification combustion dead zone, and said system also comprises:
In said underground gasification combustion dead zone, inject the injected system of water uptake expansion material; And
Water after purifying in the said settling tank is introduced the aqueduct in the said underground gasification combustion dead zone, and said water uptake expansion material absorbs from what said aqueduct was introduced purifies waste water.
15., it is characterized in that said conveyer is a helical conveyor according to claim 13 or 14 described systems.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110420018.3A CN102493840B (en) | 2011-12-15 | 2011-12-15 | Method for filling underground spaces and system for filling underground spaces |
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| CN201110420018.3A CN102493840B (en) | 2011-12-15 | 2011-12-15 | Method for filling underground spaces and system for filling underground spaces |
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| CN102493840A true CN102493840A (en) | 2012-06-13 |
| CN102493840B CN102493840B (en) | 2014-03-19 |
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| CN103244178A (en) * | 2013-05-20 | 2013-08-14 | 中国矿业大学(北京) | Method for controlling diffusion and migration of underground gasification residual pollutants |
| CN104533339A (en) * | 2014-12-05 | 2015-04-22 | 新奥气化采煤有限公司 | Close method for underground coal gasification drill hole |
| CN104653166A (en) * | 2014-12-24 | 2015-05-27 | 新奥气化采煤有限公司 | Method for controlling water collection quantity in underground coal gasification process and underground coal gasification method |
| CN106126846A (en) * | 2016-06-30 | 2016-11-16 | 中国水利水电科学研究院 | A kind of analogy method of urban underground space water inlet |
| CN107313806A (en) * | 2017-08-09 | 2017-11-03 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification combustion space area backfill system and earth-filling method |
| CN108005632A (en) * | 2017-08-11 | 2018-05-08 | 新疆国利衡清洁能源科技有限公司 | Coal underground gasifying furnace and gasification process |
| CN108286455A (en) * | 2017-12-18 | 2018-07-17 | 固岩科技发展有限公司 | A kind of method of magnesium phosphate cement consolidated fill metal mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103244178A (en) * | 2013-05-20 | 2013-08-14 | 中国矿业大学(北京) | Method for controlling diffusion and migration of underground gasification residual pollutants |
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| CN107313806A (en) * | 2017-08-09 | 2017-11-03 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification combustion space area backfill system and earth-filling method |
| CN108005632A (en) * | 2017-08-11 | 2018-05-08 | 新疆国利衡清洁能源科技有限公司 | Coal underground gasifying furnace and gasification process |
| CN108286455A (en) * | 2017-12-18 | 2018-07-17 | 固岩科技发展有限公司 | A kind of method of magnesium phosphate cement consolidated fill metal mine |
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