CN1032378A - Slow down the method and the facilities and equipments thereof of bank surface subsidence - Google Patents
Slow down the method and the facilities and equipments thereof of bank surface subsidence Download PDFInfo
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- CN1032378A CN1032378A CN 87105090 CN87105090A CN1032378A CN 1032378 A CN1032378 A CN 1032378A CN 87105090 CN87105090 CN 87105090 CN 87105090 A CN87105090 A CN 87105090A CN 1032378 A CN1032378 A CN 1032378A
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Abstract
The present invention is a kind of method and facilities and equipments thereof of slowing down the back surface subsidence of mining, its method is to drill to the absciss layer transmission band of coal seam overlying rock on the corresponding face of land in goaf, consolidate the hole then, last to the space of absciss layer transmission band mesohigh stowing pulp, to reach the purpose of slowing down sinking, when filling, need to set up the slip casting station at well head.
Description
The present invention relates to " three times " (being under the building, under the railway, under the water body) production technique field in colliery, mainly be applicable to various exploitation methods, behind the underground coal mining, absciss layer transmission band in the overlying rock is carried out sold stowing, to slow down surface subsidence.
Underground coal mining has destroyed the balance of the original pressure in stratum, because the self gravitation of rock causes the activity of stope country rock, particularly the activity of coal seam overlying rock.This activity upwards develops gradually up to the face of land, from by the top board of working seam, has occurred the crooked zone of fracture (the inbreak zone of fracture), absciss layer transmission band, slow subsiding belt from bottom to up, causes surface subsidence, influences the safety of above ground structure and facility.All adopted certain methods for solving bank ground settlement problem both at home and abroad at present, but all desirable not to the utmost.Its way has: 1. keep somewhere the safeguard protection coal column when mining, or adopt " strip coating method " exploitation, to support, the delay coal amount of the method is many, has reduced the rate of extraction; 2. immediately with waterpower, wind-force filling is carried out in the goaf after mining, the method pack densification is poor, can only solve the mining problem of girdle, is to cause the super high seam mining problem can't solve to high seam.3. large tracts of land harmonic extraction, gradation extraction system are the face of land, exploiting field is evenly sunk and will to remain ground level, and difficulty is big in strict to condition of coal seam occurrence, technical, the management, can't generally promote.Finally have only the building on the face of land, bank is reinforced, keeped in repair or moves, cause heavy economic losses.
The objective of the invention is to develop a kind of corresponding face of land, method and facilities and equipments thereof that the coal seam overlying rock is carried out sold stowing, slows down surface subsidence in the goaf.
The main points of the inventive method are: the corresponding face of land in the bank, the hole of in the absciss layer transmission band of coal seam overlying rock, drilling, with pump filler is pressed into the space of absciss layer transmission band from boring then, realizes high pressure sold stowing, slow down with obstruction absciss layer transmission band to sink with the continuation of mantlerock.
In the scope between the position of boring sinker and pre-metering under the expectation maximum on the face of land, exploiting field move horizontally a little for a short time, and definite according to surface buildings in this scope and facility concrete condition.If be subjected to the restriction of surface structures, boring can be suitably to the direction dislocation of going up a hill.Maximum sinker and minimum level transfer point down by the surface deformation law in each mining area, according to related parameter is arranged, are tried to achieve by calculating and diagram method.If its maximum sinker down of horizontal coal seam and minimum level transfer point are just in the center in goaf, if inclined seam, then will be according to seam inclination, go down the hill to influence the angle, the parameters such as influencing angle, angle of maximum subsidence of going up a hill, obtain maximum sinker and minimum level transfer point down.
The distance of two adjacent borings can be 250-350m, and the depth H of boring should be less than or equal to the superincumbent stratum thickness H in coal seam
0Deduct the maximum height h of the water flowing fractured zone that forms after mining in the mining area
1With safety isolation strip depth of stratum h
2, i.e. H≤H
0-h
1-h
2Drilling depth need reach in the absciss layer transmission band, but can not contact the crooked zone of fracture, and safe isolation strip belongs to the part of absciss layer transmission band, is that part close with the crooked zone of fracture.The thickness of safe isolation strip will be determined desirable 50-150m according to the structure and the character of rock stratum.
When punching with rig, per 50 meters surveys gradient of once holing, every suitable distance, coring once so that grasp the data of overlying rock, when boring reaches desired depth, is taken out drilling tool and is carried out electrical measurement, records the diameter and the temperature of boring different depth.Bore diameter can be 160-170mm.Carry out cementing design according to above-mentioned data, the method of well cementation is: put into sleeve pipe earlier in boring, for guaranteeing the thickness of cementing concrete ring, casing diameter is to guarantee that sleeve pipe is vertical and occupy boring central authorities than the little 30-50mm of bore diameter, around sleeve pipe, be equipped with centralizer, flow for ease of cement paste, the sleeve pipe lower end will exceed one section than foot of hole.In the upper end of sleeve pipe well cementation wellhead installation (plug gives earlier and placing in the wellhead installation) is installed then, open the cement injection valve, 500# cement is made in the cement paste sprue bushing that proportion is 1.3-1.5, and grouting amount is by the annular space volume Q decision of cover tube outside, Q=KH π (R
2-r
2), in the formula, H is a drilling depth, and R is the mean radius of boring, and r is the sleeve pipe radius, and K is surplus rich coefficient.Because injecting cement slurry volume will be more than the annular space requirement, promptly K is taken as 1.1-1.2.When reaching the regulation injection rate, close and inject the cement paste valve, open and annotate the mud valve, make to have 60-70kg/cm
2In the mud sprue bushing of pressure, the plug that orders about in the sleeve pipe moves down, with the cement paste in the sleeve pipe, by the outer annular space of pipe lower end ascending pipe, treat that cement paste overflows after, close and annotate the mud valve, keep-up pressure health about 48 hours, open valve then and put pressure, remove wellhead installation, again descend drilling tool, behind some foreign material such as removing foot of hole plug and cement.By putting Grouting Pipe, Grouting Pipe is 1 with the ratio of casing diameter: 1.5-2.5 in sleeve pipe.The Grouting Pipe lower end grows 5-20m than sleeve pipe, have approximately in the Grouting Pipe lower end on the tube wall of 5m left and right sides length, along the axis direction row's of being provided with slurry outlet equably, adjacent two pitch-rows are from can be 500mm, the aperture is 8-10mm, and the lower end of pipe is an angle, helps the drainage of filler, keep away error chlorine T imperial mandate ㄗ sunrise and wish that the boundless and indistinct of the quiet father of the quiet dam of ┛ core humiliation rice father covers and offer the useless low normal of the useless low clear of the taking off meal Li of dam fierce ⒔ Li and put low straight hill myna Sha Rouge, the F of removing of reef squid in order that valve C, D and pipeline are formed.Circulating pipe system be when Grouting Pipe is blocked, change slurry stream to, be the measure that makes things convenient for that prevents and solve the plugging problem.
At well head fixed or portable slip casting station is set for implementing the inventive method.
Fixed slip casting station comprises storage ash field, conveyor storage tank, mud pit, mixer, agitator, slush pump, wellhead assembly etc., portable slip casting station, be many automobile combinations, slush pump, mixer, mud pit, agitator, water tank etc. can be annotated porous in a station all on automobile, and filler can be selected flyash or the clay etc. of granularity below 1mm for use, particularly utilize the flyash of steam power station, both reasonably handled waste residue, found the big filler of cheap amount again, killed two birds with one stone.Embodied " it is heavy to control to give up ".
The advantage of the inventive method: do not work but take measures on the ground coal seam overlying rock absciss layer band is carried out sold stowing in the mine down-hole, method of operating is simple and easy to do, effective, not limited by space, the time conditions of down-hole, do not disturb with production, safe and reliable, underground mining, aboveground filling, the exploitation filling is neglected neither, and can carry out synchronously.Do not need complicated technology equipment and superb operant level, be easy to grasp, cost is low, and facility is reusable, the utilization rate height, the economic benefit height, the inventive method compares with " strip-type " extraction system, when reaching identical surface deformation value, the rate of extraction can improve 30%, and production efficiency can improve 50%.Compare with " large tracts of land is coordinated the gradation exploitation " method, when reaching identical deformation values on ground, the tunnelling rate can reduce by one times, and the road maintenance rate can reduce 2-3 doubly, and production efficiency can improve more than 50%.Though the inventive method needs in the ground drilling hole, build the slip casting station, it is significant damaging moving, land subsidence reparations, fill out factor such as the build up fields economic benefit of comparing again with building.
Fig. 1 is the overlying rock section activity chart of bank;
Fig. 2 is a bank surface movement and deformation schematic diagram.
Among the figure, H
0Be the overlying rock gross thickness, M is a coal seam thickness, and a is the thickness of slow subsiding belt, b is the thickness of absciss layer transmission band, and c is the thickness of the crooked zone of fracture, and L is that goaf length δ is for moving towards to influence the angle, α is a seam inclination, and β is for going down the hill to influence the angle, and γ influences the angle for going up a hill, θ is an angle of maximum subsidence, and P is for giving the maximum sinker down of meter, and S is for giving meter minimum level deformation point, W(x) be the pre-index contour of surface subsidence, Wmax is that maximum sinking value is estimated on the face of land, u(x) estimates to move horizontally curve, h for the face of land
1Be the water flowing fractured zone maximum height that the back of mining forms, h
2For safety is isolated depth of stratum.
Fig. 3 is the well cementation schematic diagram;
Fig. 4 is the hole structure schematic diagram.Have among the figure: wellhead installation 1, pressure meter 2, plug 6, centralizer 3, sleeve pipe 4, cementing concrete slurry valve A, pressure mud valve B, cementing concrete ring 5.Grouting Pipe 7 Grouting Pipe bottom sieve apertures 8, grouting pipeline system 9, circulating pipe system 10 Grouting Pipe lower end angles 11.
Fig. 5 is a fixed well head slip casting station schematic diagram.
Fig. 6 is the back underground filling method of mining, overlying rock activity situation.
Fig. 7 is after mining, absciss layer band mud placement method, overlying rock activity situation.
The foregoing invention method in conjunction with fushun mining area surface deformation law and relevant laid down by embodiment, implement more than a year through fushun mining area, certification theory is realistic, effect is obvious, economic benefit is big.
Fig. 4 is that fushun mining area is implemented hole structure schematic diagram of the present invention; Drill when reaching in the absciss layer transmission band, be 330m, bore diameter 165mm with the domestic drilling drilling depth, overlap the steel pipe that effective diameter is 127mm, long 325m, Grouting Pipe diameter 73mm has a few row's sieve apertures on the length of pipe lower end 5m, every adjacent two pitch-row 500mm, aperture 10mm sets up fixedly slip casting station, conveyor 6KW at well (boring) mouth, agitator motor 6KW, slush pump are 80KW and 135KW.
The slip casting process is: open the valve E of grouting pipeline system (9) earlier, send attal (flyash) and water to mixer (14) by a certain percentage and evenly stir, the slurries of mixing fall into mud pit (17), and proportion is more than or equal to 1.2.For anti-precipitation, be provided with agitator (16) in the mud pit (17), stir once at regular intervals, the interior mud in pond (17) is used 30-50kg/cm by slush pump (18)
2Pressure enters in the space of absciss layer transmission band through grouting pipeline system (9), valve E.If Grouting Pipe (7) is blocked, just open the valve C of circulating pipe system (10), open the valve F of grouting pipeline system (9), valve-off E, slush pump (18) is pressed into sleeve pipe (4) with mud from valve F, by turning back to mud pit (17) through Grouting Pipe (7), valve C at the bottom of the hole, promptly handle the obstructing problem of Grouting Pipe (7).
Through fushun mining area continuous slip casting every day over one year, grouting pressure is by initial 80kg/cm
2Drop to 50kg/cm
2, be stabilized to 35kg/cm at last
2About, existing slip casting 20000m
3, fly ash in electric power plant 7000m wherein
3, water 13000m
3Above-mentioned sold stowing experiment, every month observation data cumulative statistics shows through the face of land, and face of land largest amount of subsidence is than estimating to reduce 50-60%, and maximum subsidence velocity slows down 70-80% than estimating, at underground coal mining scope 25700m
2, under the situation of coal seam thickness 27m, surplus the extraction coal 100 ten thousand tons, after the said method filling, above ground structure does not have damage, and is safety and sound.
Claims (10)
1, a kind of method of slowing down the bank surface subsidence is characterized in that punching in the absciss layer transmission band of coal seam overlying rock on the corresponding face of land of bank, with pump filler (mud) is pressed into the space of absciss layer transmission band from boring then.
2, in accordance with the method for claim 1, it is characterized in that the position of holing sinker and estimate that if limited by above ground structure, boring can be suitably to the direction dislocation of going up a hill in the scope between the minimum level transfer point under the expectation maximum on the face of land, exploiting field.
3, in accordance with the method for claim 1, it is characterized in that two distances between the adjacent boring can be 250-350m.
4, in accordance with the method for claim 1, it is characterized in that the depth H of holing should be less than or equal to the superincumbent stratum thickness H in coal seam
0Deduct the maximum height h of the water flowing fractured zone that forms behind the mine coal-cutting
1With safety isolation strip depth of stratum h
2, i.e. H≤H
0-h
1-h
2
5, in accordance with the method for claim 1, it is characterized in that the diameter of holing can be 160-170mm, the diameter of sleeve pipe (4) is than the little 30-50mm of bore diameter.
6, in accordance with the method for claim 1, when it is characterized in that solid boring, the first sleeve pipe (4) of in boring, packing into, sleeve pipe (4) is equipped with centralizer (3) on every side, sleeve pipe (4) lower end exceeds one section than foot of hole, in the upper end of sleeve pipe (4) well cementation wellhead installation (1) is installed then, (plug (6) gives and placing earlier in the wellhead installation), open cement injection valve A, to grout in the sleeve pipe (4), and when reaching the regulation injection rate, close and inject cement paste valve A, open and annotate mud valve B, have 60-70kg/cm
2The plug (6) that the mud of pressure orders about in the sleeve pipe (4) moves down, the cement paste that sleeve pipe (4) is interior is by the outer annular space of pipe (4) lower end ascending pipe, after treating that cement paste overflows ground, valve-off B, keep-up pressure health about 48 hours, open valve again and put pressure, remove wellhead installation (1), descend drilling tool to remove foreign material such as the boring plug (6) at the end, cement again.
7, in accordance with the method for claim 1, it is characterized in that inserting Grouting Pipe (7) in sleeve pipe (4), Grouting Pipe (7) is than the long 5-20m of sleeve pipe (4), and Grouting Pipe (7) is 1 with sleeve pipe (4) diameter ratio: 1.5-2.5.
8, according to claim 1,7 described methods, it is characterized in that having the tube wall upper edge axis direction of 5m left and right sides length to be provided with plasma discharge hole (8) uniformly approximately in Grouting Pipe (7) lower end, adjacent two holes (8) distance can be 500mm, and diameter is 8-10mm.
9, a kind of enforcement slows down the well head slip casting station of bank surface subsidence method, it is characterized in that the facility at this station comprises bedding plant (12), conveyor (13), mixer (14), water storage tank (15) agitator (16), mud pit (17), slush pump (19), submersible pump (20), wellhead assembly (21).
10,, it is characterized in that being equipped with on the wellhead assembly (21) grouting pipeline system (9), circulating pipe system (10) and C, D, E, F valve according to the described well head slip casting of claim 9 station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105090 CN1013605B (en) | 1987-09-26 | 1987-09-26 | Method and implements for retarding subsiding of earth surface above coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105090 CN1013605B (en) | 1987-09-26 | 1987-09-26 | Method and implements for retarding subsiding of earth surface above coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032378A true CN1032378A (en) | 1989-04-12 |
| CN1013605B CN1013605B (en) | 1991-08-21 |
Family
ID=4815179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105090 Expired CN1013605B (en) | 1987-09-26 | 1987-09-26 | Method and implements for retarding subsiding of earth surface above coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013605B (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165317B (en) * | 2006-10-16 | 2010-12-01 | 中国矿业大学(北京) | Filling device and method for filling down-hole goaf by same |
| CN101598032B (en) * | 2009-06-30 | 2012-07-11 | 北京国电华北电力工程有限公司 | Goaf grouting method for constructing extra-high voltage poles and towers |
| CN102705001A (en) * | 2012-05-25 | 2012-10-03 | 中国矿业大学 | Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock |
| CN103147758A (en) * | 2012-05-25 | 2013-06-12 | 中国矿业大学 | Coal mining rate control method matching with isolated grouting filling of mining overburden zone |
| CN103212334A (en) * | 2013-04-13 | 2013-07-24 | 淄博王煤矿业有限公司 | Self-service integrated equipment and process for preparing and conveying slurry material |
| CN103628912A (en) * | 2013-11-04 | 2014-03-12 | 葛洲坝集团基础工程有限公司 | Goaf management filling grouting construction method |
| CN103993882A (en) * | 2014-05-26 | 2014-08-20 | 中国矿业大学 | Method for replacing strip coal pillars by means of grouting in collapse area |
| CN104763466A (en) * | 2015-03-19 | 2015-07-08 | 中国矿业大学 | Method for detecting active diffusion radius of covered rock separation grouting filling slurry |
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| CN105240047A (en) * | 2015-09-16 | 2016-01-13 | 鞍钢集团矿业公司 | Filling reinforcement method for managing underground mined area of open-pit mine |
| CN107218078A (en) * | 2017-07-25 | 2017-09-29 | 福建永强岩土股份有限公司 | Filled for underground coal goaf and abandoned workings, the new technology of grouting filling |
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| CN108547657A (en) * | 2018-02-24 | 2018-09-18 | 煤炭工业济南设计研究院有限公司 | The assay method of integrated design is filled in a kind of underground coal mine selecting |
| CN108661705A (en) * | 2018-06-25 | 2018-10-16 | 山东科技大学 | Item adopts goaf quaternity comprehensive treatment construction method |
| CN109505599A (en) * | 2019-01-09 | 2019-03-22 | 淮南矿业(集团)有限责任公司 | It automates gang drill and considers system and method to be worth doing |
| CN110472273A (en) * | 2019-07-01 | 2019-11-19 | 中国矿业大学 | A kind of vertical absciss layer prediction technique of overlying strata |
| CN110552717A (en) * | 2019-05-27 | 2019-12-10 | 中铁十八局集团第四工程有限公司 | sand cobble stratum shield tunnel earth surface layering differential settlement space grouting settlement reduction method |
| CN111535297A (en) * | 2020-05-19 | 2020-08-14 | 河北建设勘察研究院有限公司 | Method for filling underground cavity of foundation rock stratum by filler grouting and hydraulic filling device |
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-
1987
- 1987-09-26 CN CN 87105090 patent/CN1013605B/en not_active Expired
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|---|---|---|---|---|
| CN101165317B (en) * | 2006-10-16 | 2010-12-01 | 中国矿业大学(北京) | Filling device and method for filling down-hole goaf by same |
| CN101598032B (en) * | 2009-06-30 | 2012-07-11 | 北京国电华北电力工程有限公司 | Goaf grouting method for constructing extra-high voltage poles and towers |
| CN102705001B (en) * | 2012-05-25 | 2014-08-20 | 中国矿业大学 | Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock |
| CN102705001A (en) * | 2012-05-25 | 2012-10-03 | 中国矿业大学 | Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock |
| CN103147758A (en) * | 2012-05-25 | 2013-06-12 | 中国矿业大学 | Coal mining rate control method matching with isolated grouting filling of mining overburden zone |
| CN103147758B (en) * | 2012-05-25 | 2014-12-10 | 中国矿业大学 | Coal mining rate control method matching with isolated grouting filling of mining overburden zone |
| CN103212334B (en) * | 2013-04-13 | 2014-12-24 | 淄博王煤矿业有限公司 | Self-service integrated equipment and process for preparing and conveying slurry material |
| CN103212334A (en) * | 2013-04-13 | 2013-07-24 | 淄博王煤矿业有限公司 | Self-service integrated equipment and process for preparing and conveying slurry material |
| CN103628912A (en) * | 2013-11-04 | 2014-03-12 | 葛洲坝集团基础工程有限公司 | Goaf management filling grouting construction method |
| CN103628912B (en) * | 2013-11-04 | 2016-05-11 | 中国葛洲坝集团基础工程有限公司 | The construction method of filling grouting is processed in a kind of goaf |
| CN103993882A (en) * | 2014-05-26 | 2014-08-20 | 中国矿业大学 | Method for replacing strip coal pillars by means of grouting in collapse area |
| CN104763466A (en) * | 2015-03-19 | 2015-07-08 | 中国矿业大学 | Method for detecting active diffusion radius of covered rock separation grouting filling slurry |
| CN104847404A (en) * | 2015-03-24 | 2015-08-19 | 中交一航局第四工程有限公司 | Construction technology of gob grouting method |
| CN105240047A (en) * | 2015-09-16 | 2016-01-13 | 鞍钢集团矿业公司 | Filling reinforcement method for managing underground mined area of open-pit mine |
| CN107313745A (en) * | 2017-07-18 | 2017-11-03 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of cementing method for crossing the intensive grouting and reinforcing coal bed gas well of many nodes in goaf |
| CN107218078A (en) * | 2017-07-25 | 2017-09-29 | 福建永强岩土股份有限公司 | Filled for underground coal goaf and abandoned workings, the new technology of grouting filling |
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| CN108547657A (en) * | 2018-02-24 | 2018-09-18 | 煤炭工业济南设计研究院有限公司 | The assay method of integrated design is filled in a kind of underground coal mine selecting |
| CN108547657B (en) * | 2018-02-24 | 2020-05-08 | 通用技术集团工程设计有限公司 | Analysis and evaluation method for coal mine underground mining, selecting and charging integrated design |
| CN108661705A (en) * | 2018-06-25 | 2018-10-16 | 山东科技大学 | Item adopts goaf quaternity comprehensive treatment construction method |
| CN109505599B (en) * | 2019-01-09 | 2024-01-23 | 淮南矿业(集团)有限责任公司 | Automatic drill chip removing system and method |
| CN109505599A (en) * | 2019-01-09 | 2019-03-22 | 淮南矿业(集团)有限责任公司 | It automates gang drill and considers system and method to be worth doing |
| CN110552717A (en) * | 2019-05-27 | 2019-12-10 | 中铁十八局集团第四工程有限公司 | sand cobble stratum shield tunnel earth surface layering differential settlement space grouting settlement reduction method |
| CN110472273A (en) * | 2019-07-01 | 2019-11-19 | 中国矿业大学 | A kind of vertical absciss layer prediction technique of overlying strata |
| CN110472273B (en) * | 2019-07-01 | 2021-04-16 | 中国矿业大学 | Overburden vertical separation layer prediction method |
| CN111535297A (en) * | 2020-05-19 | 2020-08-14 | 河北建设勘察研究院有限公司 | Method for filling underground cavity of foundation rock stratum by filler grouting and hydraulic filling device |
| CN114233378A (en) * | 2021-12-17 | 2022-03-25 | 中国十七冶集团有限公司 | Goaf self-walking drilling and grouting integrated equipment and installation and use method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1013605B (en) | 1991-08-21 |
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