CN102493840B - 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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- CN102493840B CN102493840B CN201110420018.3A CN201110420018A CN102493840B CN 102493840 B CN102493840 B CN 102493840B CN 201110420018 A CN201110420018 A CN 201110420018A CN 102493840 B CN102493840 B CN 102493840B
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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 ofly to fill the method for the underground space, in order to fill the system of the underground space.
Background technology
In Underground Coal Gasification Process, development along with burning face, undergroundly can form combustion dead zone, large-area coal seam, gasifier operation or close after stove, in combustion dead zone, heat is understood continuous circumference unreacted coal seam, thereby make coal seam that dry distillation reactor occur, produce a large amount of tar and organic matter, these organic matters are brought in combustion dead zone by coal seam infiltration around, form underground sewage, then have influence on underground reservoir, infiltration also can make the water in aquifer be polluted for a long time; The expansion of combustion dead zone also can cause the supporting intensity of upper strata rock top board to decline, go down for a long time also can cause top board to subside, in one side, the water in aquifer leaks and into combustion dead zone, causes water pollution or put out by water just at operating gasification furnace, can cause the depression on earth's surface on the other hand, upper strata surface structures is caused to potential safety hazard.
In underground gasification furnace running; can produce a large amount of sewage; these sewage can directly be disposed to ground or carry out some and simply process after catch pit is extracted into ground at present; but the intermediate water after processing again still can not reach drinking water or safe water quality standard; these water drain into around in waters or soil; or can cause the pollution of waters or soil, affect surrounding enviroment protection.
Prior art one: US4,323,122 pairs of pollutants have carried out extracting recycling, but this method is only applicable to that underground pollution thing is revealed or other to the less demanding situation of water content, inapplicable the in the situation that of a large amount of water in underground gasification combustion dead zone, a large amount of water causes underground gasification district temperature just at work to decline, even can put flame front out by water, the impact of underground water burst on gasification furnace can not be solved, so not only will reduce organic content in gasification zone, also total Water will be reduced.
Prior art two: US4,832,122 have introduced a kind of underground water original position repair system, beat Injection Well and extraction well to contaminated area.Injection Well injects air, other gas or liquid, impels volatile organic matter volatilization, then from extraction well, discharges, and filters, burning, atmosphere diffuse to ground.CN101381149A has introduced a kind of underground water original position repair system, and this technology is passed into combustion dead zone water bottom by discarded gasification furnace boring hydrogen peroxide, and the phenols oxidation Decomposition in water body is become to carbon dioxide and water.But this original position recovery system can only reduce the volatile organic matter in sewage, for other pollutants, further do not process, and in combustion dead zone, the existence of negative pressure can make upper water constantly leak into combustion dead zone, pollutant also can move along with flowing of water, causes the further pollution of underground water.
Prior art three: US5287926 has introduced the problems such as roof collapse of avoiding firing 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, can not be by fill up combustion dead zone from sedimentation at horizontal seam solid mineral, cause and block up at filler Near Pipelines, skewness in combustion dead zone, top board does not obtain strong supporting, so technique can not comprehensively solve the problem of underground combustion dead zone top plate inbreak.
Prior art four: CN101021161A has introduced a kind of use and has transported in the goaf of mining system earth-filling method, mainly to tunnel, dig a well, by conveyance conduit, in tunnel, insert mixed slurry, by concussion, slurry is evenly distributed, after being dried, reaches the object of supporting roof, but technique needs a large amount of water sources on the ground of introducing, make slurry become liquid form, not only cause a large amount of wastes of ground drinking water, also can in underground gasification system, introduce extra moisture, affect the carrying out of gasification.
Therefore, how to reduce environment pollution and the surface subsidence impact on periphery masses productive life, the sustainable development that realizes underground original position gasification becomes current Focal point and difficult point.
Summary of the invention
For the problem existing in correlation technique, the object of the present invention is to provide and a kind ofly fill the method for the underground space, in order to fill the system of the underground space, at least can reduce on the one hand the risk of groundwater pollution, reduce on the other hand the contaminated risk of surface soil.
For achieving the above object, the invention provides a kind of method of filling the underground space on the one hand, comprising: from underground gasification combustion dead zone extraction sewage, send into settling tank and purify; Water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; And slurry is packed into the underground space and is dried processing.
Preferably, the underground space and underground gasification combustion dead zone are the same space, and the sewage extracting from underground gasification combustion dead zone is backfilled to this underground gasification combustion dead zone becoming slurry; Or the underground space is the target fill area isolating completely with underground gasification combustion dead zone, target fill area is Goaf Area or another underground gasification combustion dead zone.
Preferably, in the underground space and underground gasification combustion dead zone, be that the same space and underground gasification fire under the situation gasifying dead zone, method also comprises: before filling paste, along the direction that deviates from Flame district, underground combustion dead zone, inject water uptake expansion material
Wherein, the water uptake expansion material that this edge deviates from the direction injection in Flame district, underground combustion dead zone absorbs the sewage that underground gasification fires dead zone, after water uptake expansion material expands and be partitioned into the insulating space of isolating with flame zone in underground combustion dead zone, just in insulating space, carry out this slurry filling.
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 to the water after the purification that water uptake expansion material absorption feeds and the sewage in the underground space.
Preferably, in carrying out the process of slurry filling, the slurry after passing into off and on gas-pressurized in injected hole and making to inject is uniformly distributed in the underground space, and wherein injected hole is: the top board that penetrates the underground space is communicated with the perforate of the underground space.
Preferably, passing into off and on gas-pressurized is: in the process of filling paste, every air blast half an hour once, the wind blasting is forced air.
Preferably, according to the step purge sewage carrying out successively as follows: sewage is carried out in settling tank to natural subsidence, make organic oils, water and mud layering; Organic oils after 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 every three hours sampling and measuring ammonia nitrogen concentrations, until ammonia nitrogen removal frank is more than 90%; Add strong oxidizer CIO
2, addition is phenol concentration (the phenol concentration in waste water) and CIO
2concentration ratio 1: 3.0-1: 3.5, every three hours sampling and measuring volatile phenol contents, until phenol concentration clearance is more than 90% in sewage; The pH value that regulates sewage, is 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 any combination 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 any combination 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 any combination of xanthogenation.
Preferably, the slurry of the underground space is lived the top board of the underground space in the rear support that is dried.
Preferably, the underground space is in underground horizontal seam.
The invention provides on the other hand a kind ofly in order to fill the system of the underground space, comprising: the suction pump that extracts sewage from underground gasification combustion dead zone; The settling tank that sewage is purified, has the treated water outlet flowing out for water after purifying and the sewage inlet being communicated with the pump discharge of suction pump; The 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; Slurry injection device, has the inlet entering for the solid pulping raw material of pulverizing, the feed water inlet being communicated with the delivery port of water pipeline and solid pulping raw material and the slurry being mixed into 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: to underground gasification, fire the injected system of injecting water uptake expansion material in dead zone; And the water after purifying in settling tank is introduced to the aqueduct in underground gasification combustion dead zone, water uptake expansion material absorbs purifying waste water of introducing from aqueduct.
Preferably, conveyer is helical conveyor.
Useful technique effect of the present invention is:
First, the present invention makes slurry with the solid pulping raw material of pulverizing after extracting the underground sewage processing in underground gasification combustion dead zone, then say to slurry and be filled into the underground space (target packing space), reduce on the one hand the risk of groundwater pollution, reduce on the other hand the contaminated risk of surface soil.
Second, the present invention first carries out the sewage of extraction natural subsidence layering, removes organic oil, then adds preparation to sewage clarification, it has fully utilized the water technology of physics and chemistry, easy and simple to handle and effective, the relevant expense of cleaning equipment of having avoided extensive biochemical treatment and having produced, and settling tank floor space is little, water treatment cycle period is short.
The 3rd, the present invention makes slurry by purifying waste water of sewage generation in settling tank and is filled into the underground space, reduced again purify the correlative charges of generation from purifying waste water of settling tank on the one hand, reduced on the other hand the purified water that settling tank the is discharged pollution that surface soil causes of being rivals in a contest of running in.
The 4th, the present invention is dried being filled into the slurry of the underground space, owing to forming the raw material of slurry, comprised for example comminuted solids pulping raw material of cement, sandy soil, broken spoil, therefore dried slurry plays support action to top board, avoid subsiding of top board to cause the sinking on earth's surface on the one hand, avoid on the other hand negative pressure to make underground water flow into underground gasification combustion dead zone, cause the continuation of underground water to pollute.
The 5th, at target packing space, be the same space with the underground gasification combustion dead zone of extracting sewage, and when gasifying in this underground gasification combustion dead zone, the present invention fills water uptake expansion material along the direction that deviates from underground gasification combustion Flame district, dead zone, water uptake expansion material is blocked the part passage of the underground space after imbibition, now water uptake expansion material is partitioned into the insulating space of isolating with flame zone in underground gasification combustion dead zone, in this insulating space, carry out slurry injection, realized when not affecting the place ahead flame face, the combustion dead zone at backfill flame zone rear, make the gasification in underground gasification combustion dead zone and purify to carry out simultaneously, having realized the sustainability of underground gasification carries out.
Accompanying drawing explanation
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: from underground gasification combustion dead zone extraction sewage, send into settling tank and purify; Water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; This slurry is packed into the described underground space and is dried processing.The described underground space is target fill area, and this target fill area can be described underground gasification combustion dead zone, can be also another underground gasification combustion dead zone or the Goaf Area isolating completely with this underground gasification combustion dead zone.
[embodiment 1]
The embodiment 1 of the inventive method is described referring to accompanying drawing 1 below, in this embodiment 1, target fill area is the same space with the underground gasification combustion dead zone of extracting sewage, and gasify in this underground gasification combustion dead zone, now the inventive method comprises the steps: that the underground sewage that underground gasification is fired in dead zone is extremely aboveground through sewage extraction line (catch pit or venthole) 7 extractings, by transport pipeline, transporting settling tank 4 to purifies, in this sewage, contain a large amount of mud, organic oils and multiple hazardous trace elements, oil content 400-700mg/L wherein, volatile phenol 1500-2000mg/L, ammonia nitrogen 600-900mg/L, pH value is in 9 left and right.The sewage of extracting out is carried out to purified treatment, particularly, first by the natural subsidence of 1-2 days, make organic oils, water and mud layering (one by one corresponding to oil reservoir, water layer, mud in Fig. 1) in sewage, organic oils as shown in Figure 1 is at top layer, by oil-drain pipe (being connected to settling tank place corresponding to the oil drain out 103 of organic oils), get rid of organic oils, collect organic oils and wait for processing and utilizing again; Second step drops into magnesium compound and phosphoric acid and hydrophosphate in sewage in settling tank, and the mol ratio of magnesium, nitrogen, phosphorus is 1.3: 1: 1, and every three hours sampling and measuring ammonia nitrogen concentrations, until ammonia nitrogen removal frank is more than 90%; The 3rd step, adds strong oxidizer CIO
2, addition is phenol concentration (phenol concentration in sewage) and CIO
2concentration ratio 1: 3.0-1: 3.5, every three hours sampling and measuring volatile phenol contents, until phenol concentration clearance is more than 90% in sewage; The 4th step, the pH value of adjusting sewage, is 6.5-7.5.By above processing procedure, reclaim the organic oils in sewage, the solid impurities such as mud are deposited to bottom, extract the pretreated water in middle part (water after being cleaned in settling tank again) and be delivered to slurry injection device by pipeline, in 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 after sewerage treatment, to carry out original position backfill combustion dead zone.For fear of the place ahead flame zone (Fig. 1 shows the flame front of the place ahead flame zone) affecting in underground gasification combustion dead zone, first to this underground combustion dead zone, inject water swellability material, injection direction is flame zone (being combustion dead zone, rear direction) in the other direction, from Fig. 1, also can find out that this injection direction is the direction that deviates from flame zone, it is that well head 2 nearest apart from flame zone injects water swellability material by pipeline that Fig. 1 also shows, second step, (this secondary water purification is from the water after being cleaned in settling tank by the rear well head 1 slightly far away apart from flame zone, to spray into a small amount of secondary water purification, purifying waste water of slurry is identical with supporting), wait for for example 12-24 hour, until water swellability material, after underground absorption combustion dead zone sewage and the secondary water purification that sprays into, expand, thereby block combustion dead zone part passage, in this combustion dead zone, be partitioned into the insulating space with flame zone isolation, the 3rd step, cement by the sewage of processing with pulverizing, the solid pulping raw materials such as sandstone fully mix, pour into slurry injection device 5 and be backfilled to above-mentioned insulating space (in Fig. 1, this insulating space is the region at underground gasification combustion rear, Flame district, dead zone) by pressurization well head 1, in the process of backfill combustion dead zone, to well head 1 (now as grouting port) intermittently pass into gas-pressurized, slurries can not blocked up at well head, be evenly distributed in combustion dead zone, intermittently passing into gas-pressurized in actual applications can be: every slip casting air blast half an hour once, this wind blasting can be that air can be also other gases.Finally, by the slurries that inject being dried such as blasting the gases such as air, at dry rear enclosed gasification furnace, the top board that wherein slurry is lived the underground space in the rear support that is dried prevents from subsiding.From Fig. 1, obviously can find out, well head 2 is the perforates that penetrate this underground gasification combustion dead zone top plate, wherein also with label 6, indicates subterranean coal, collects the oil pipe that organic oils uses, the soil pipe of purifying waste water and drawing that sewage in settling tank is produced.
Above-described embodiment 1 has comprised the step of purifying waste water in settling tank being introduced to underground gasification combustion dead zone, but this step is not necessary, for example, when water uptake expansion material is absorbing in combustion dead zone sewage metapedes to form described insulating space, can omit this step, otherwise need to increase this step.Further, while sewage being carried out to natural subsidence in settling tank, the time also determines as the case may be, as long as can be by organic oils, water, mud layering.
In addition, although what describe in above-described embodiment 1 is that this underground gasification fires the situation of filling under the situation gasifying dead zone, but should be appreciated that, for discarded underground gasification combustion dead zone method of the present invention, be also suitable for, just there is not the problem that affects underground gasification combustion Flame district, 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 relating in the present embodiment 1 can be formed in the underground space in horizontal seam.
[embodiment 2]
The embodiment 2 of the inventive method is described referring to accompanying drawing 2 below, as different from Example 1:
(1) in the present embodiment 2, target fill area is not the same space with the underground gasification combustion dead zone of extracting sewage, in brief, embodiment 2 extracts sewage from a underground gasification combustion dead zone, to after sewerage treatment, the water purification after sewage clarification being made to slurry, slurry is sent in another underground gasification combustion dead zone;
(2) and target fill area can be also Goaf Area, the Goaf Area of for example taking ore deposit outside coal to form.
(3) step of injecting water uptake expansion material in embodiment 1 can be adopted, also this step can be do not adopted.
Except above-mentioned (1)-(3), embodiment 2 remainders are identical with embodiment 1, repeat no more herein.
In embodiment 1 and 2, obviously sewerage treatment is all to carry out in the outside of extracting the underground gasification combustion dead zone of sewage, no matter produce slurry or directly introduce in target fill area, water used is all from settling tank, be cleaned purifying waste water of rear generation by sewage wherein.The present invention does not purify again to purifying waste water.
To sum up, the inventive method obtains following useful technique effect:
First, the present invention makes slurry with the solid pulping raw material of pulverizing after extracting the underground sewage processing in underground gasification combustion dead zone, then say to slurry and be filled into the underground space (target packing space), reduce on the one hand the risk of groundwater pollution, reduce on the other hand the contaminated risk of surface soil;
Second, the present invention first carries out the sewage of extraction natural subsidence layering, removes organic oil, then adds preparation to sewage clarification, it has fully utilized the water technology of physics and chemistry, easy and simple to handle and effective, the relevant expense of cleaning equipment of having avoided extensive biochemical treatment and having produced, and settling tank floor space is little, water treatment cycle period is short;
The 3rd, the present invention makes slurry by purifying waste water of sewage generation in settling tank and is filled into the underground space, reduced again purify the correlative charges of generation from purifying waste water of settling tank on the one hand, reduced on the other hand the purified water that settling tank the is discharged pollution that surface soil causes of being rivals in a contest of running in.
The 4th, the present invention is dried being filled into the slurry of the underground space, owing to forming the raw material of slurry, comprised for example comminuted solids pulping raw material of cement, sandy soil, broken spoil, therefore dried slurry plays support action to top board, avoid subsiding of top board to cause the sinking on earth's surface on the one hand, avoid on the other hand negative pressure to make underground water flow into underground gasification combustion dead zone, cause the continuation of underground water to pollute.
The 5th, at target packing space, be the same space with the underground gasification combustion dead zone of extracting sewage, and when gasifying in this underground gasification combustion dead zone, the present invention fills water uptake expansion material along the direction that deviates from underground gasification combustion Flame district, dead zone, water uptake expansion material is blocked the part passage of the underground space after imbibition, now water uptake expansion material is partitioned into the insulating space of isolating with flame zone in underground gasification combustion dead zone, in this insulating space, carry out slurry injection, realized when not affecting the place ahead flame face, the combustion dead zone at backfill flame zone rear, make in underground gasification combustion dead zone should be gasification, purify, backfill is carried out simultaneously, having realized the sustainability of underground gasification carries 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; The settling tank 4 that sewage is purified, this settling tank 4 has the treated water outlet 101 flowing out for water after purifying and the sewage inlet 102 being communicated with the pump discharge of this suction pump; The flood pattern with water pipeline, the water inlet that this water pipeline has delivery port and is communicated with the treated water outlet 101 of settling tank; Slurry injection device, has inlet, the feed water inlet being communicated with the delivery port of water pipeline entering for the solid pulping raw material of pulverizing and this solid pulping raw material and this slurry being mixed into of purifying waste water is delivered to the conveyer in the underground space.This underground space is the same space with the underground gasification combustion dead zone of extracting sewage; Or this underground space is the target fill area isolating completely with the underground gasification combustion dead zone of extracting sewage, and target fill area is Goaf Area or another underground gasification combustion dead zone; And when relating to underground gasification combustion dead zone, it can be both that discarded space can be also the space of gasifying.
From Fig. 1, also can find out, when target packing space is the same space with the underground gasification combustion dead zone of extracting sewage, system of the present invention also comprises: to this underground gasification, fire the injected system of injecting water uptake expansion material in dead zone; And the water after purifying in settling tank is introduced to the aqueduct (draw and purify waste water from the position of the soil pipe shown in Fig. 1) in this underground gasification combustion dead zone, the water uptake expansion material of injection absorbs purifying waste water and firing dead zone sewage of introducing from aqueduct.From Fig. 1 and Fig. 2, also can find out, in the present invention, the conveyer of slurry injection device is preferably helical conveyor.
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 any combination 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 any combination of xanthogenation.
Device of the present invention can be implemented method of the present invention, and has obtained corresponding technique effect when implementing this method.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (14)
1. a method of filling the underground space, is characterized in that, comprising:
From underground gasification combustion dead zone extraction sewage, send into settling tank and purify;
Water after purifying and the solid pulping raw material of pulverizing are mixed into slurry; And
Described slurry is packed into the described underground space and is dried processing,
Wherein, the described underground space and described underground gasification combustion dead zone are the same space, and the sewage extracting from described underground gasification combustion dead zone is backfilled to this underground gasification combustion dead zone becoming slurry; Or,
The described underground space is the target fill area isolating completely with described underground gasification combustion dead zone, and described target fill area is Goaf Area or another underground gasification combustion dead zone.
2. the method for the filling underground space according to claim 1, is characterized in that,
In the described underground space and described underground gasification combustion dead zone, be that the same space and described underground gasification fire under the situation gasifying dead zone, described method also comprises: before filling paste, along the direction that deviates from Flame district, described underground combustion dead zone, inject water uptake expansion material, wherein, described water uptake expansion material absorbs the sewage in described underground gasification combustion dead zone, after described water uptake expansion material expands and be partitioned into the insulating space of isolating with described flame zone in described underground combustion dead zone, just in described insulating space, carry out described slurry and fill.
3. the method for the filling underground space according to claim 2, is characterized in that, also comprises:
Before carrying out described slurry filling and after injecting described water uptake expansion material, the water after described purification is sent in the described underground space,
Wherein, the water after the described purification that described water uptake expansion material absorption feeds and the sewage in the described underground space.
4. according to the method for filling the underground space described in any one in claim 1-3, it is characterized in that,
In carrying out the process of slurry filling, the slurry after passing into off and on gas-pressurized in injected hole and making to inject is uniformly distributed in the described underground space,
Wherein said injected hole is: the top board that penetrates the described underground space is communicated with the perforate of the described underground space.
5. fill according to claim 4 the method for the underground space, it is characterized in that,
The described gas-pressurized that passes into is off and on: in the process of filling paste, every air blast half an hour once, the wind blasting is forced air.
6. according to the method for the filling underground space described in any one in claim 1-3, it is characterized in that, according to sewage described in the step purge of carrying out successively as follows:
Described sewage is carried out in settling tank to natural subsidence, make organic oils, water and mud layering;
Organic oils after layering is discharged from settling tank;
In described settling tank, drop into magnesia and phosphoric acid and hydrophosphate, the mol ratio of magnesium, nitrogen, phosphorus is 1.3:1:1, and every three hours sampling and measuring ammonia nitrogen concentrations, until ammonia nitrogen removal frank is more than 90%;
Add strong oxidizer CIO
2, addition is phenol concentration and CIO in sewage
2concentration ratio 1:3.0-1:3.5, every three hours sampling and measuring volatile phenol contents, until phenol concentration clearance is more than 90% in sewage;
The pH value that regulates sewage, is 6.5-7.5.
7. the method for the filling underground space according to claim 5, is characterized in that, the time of described natural subsidence is 1-2 hour.
8. the method for the filling underground space according to claim 1, it is characterized in that, the solid pulping raw material of described 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 any combination of xanthogenation.
9. according to the method for the filling underground space described in claim 2 or 3, it is characterized in that,
The solid pulping raw material of described 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 any combination of xanthogenation;
Described 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 any combination of xanthogenation.
10. according to the method for filling the underground space described in any one in claim 1-3, it is characterized in that, the slurry of the described underground space is stated the top board of the underground space in the rear support residence that is dried.
11. according to the method for filling the underground space described in any one in claim 1-3, it is characterized in that, the described underground space is in underground horizontal seam.
12. 1 kinds in order to fill the system of the underground space, it is characterized in that, comprising:
From underground gasification combustion dead zone, extract the suction pump of sewage;
The settling tank that sewage is purified, has the treated water outlet flowing out for the water after purifying and the sewage inlet being communicated with the pump discharge of described suction pump;
The flood pattern with water pipeline, the water inlet that this water pipeline has delivery port and is communicated with the treated water outlet of described settling tank;
Slurry injection device, have the inlet entering for the solid pulping raw material of pulverizing, the feed water inlet being communicated with the delivery port of described water pipeline and by described solid pulping raw material and described in the slurry being mixed into of purifying waste water be delivered to the conveyer in the described underground space
Wherein, the described underground space is described underground gasification combustion dead zone.
13. systems according to claim 12, is characterized in that, described system also comprises:
To described underground gasification, fire the injected system of injecting water uptake expansion material in dead zone; And
Water after purifying in described settling tank is introduced to the aqueduct in described underground gasification combustion dead zone, and described water uptake expansion material absorbs purifying waste water of introducing from described aqueduct.
14. according to the system described in claim 12 or 13, it is characterized in that, described conveyer is helical conveyor.
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