CN203035203U - Pressure-isolating, permeating and cementing grouting device of borehole casing for roadway water-surrounded broken rock - Google Patents
Pressure-isolating, permeating and cementing grouting device of borehole casing for roadway water-surrounded broken rock Download PDFInfo
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- CN203035203U CN203035203U CN 201220736324 CN201220736324U CN203035203U CN 203035203 U CN203035203 U CN 203035203U CN 201220736324 CN201220736324 CN 201220736324 CN 201220736324 U CN201220736324 U CN 201220736324U CN 203035203 U CN203035203 U CN 203035203U
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Abstract
The utility model discloses a pressure-isolating, permeating and cementing grouting device of a borehole casing for a roadway water-surrounded broken rock. The pressure-isolating, permeating and cementing grouting device comprises a pressure-isolating expanding grouting device and a pressure-isolating permeating grouting tube which are combined together. Quick solidification materials are infused into the pressure-isolating expanding grouting device to enable expansion cloth to spread out to be pressed tightly against a hole wall of the borehole, so that disturbing damages caused by grouting pressure to a water-surrounded broken rock during a permeating grouting process are prevented, and roadway deformation even roadway collapses generated during the permeating grouting process are avoided; grouting is performed on a bare bore section through the permeating grouting tube, and grouting fluid is permeated into water-diverting cracks by the aid of grouting pressure; and after the pressure-isolating permeating grouting tube is taken out through a core tube, annular cementing material guard rings are formed in the borehole to protect the wall of the borehole and stop water permeation; and therefore, cementing quality of the borehole casing is guaranteed.
Description
Technical field
The utility model relates to a kind of down-hole drilling construction technology, be particularly related to a kind of tunnel broken water burst country rock borehole casing every pressing infiltration sealing grouting device, belong to technical fields such as geological prospectings such as mine, traffic tunnel, water conservancy and hydropower, water damage control, infrastructure.
Background technology
The coal mine test discharge water and the grouting for water blocking drilling construction in, because being subjected to the restriction of down-hole geology and tunnel environment and construction technical schemes, the perforate design attitude of holing often is in roadway surrounding rock crag water burst reduction stage.With this understanding, because roadway surrounding rock exists broken water burst, bring great difficulty for the sealing of borehole casing, the sealing mortality is very high.Reason be in the water burst broken rock to can be because of the grouting pressure disturbance in the sleeve pipe sealing grouting operation, destroy original just broken rock stratum, cause the distortion of tunnel broken country rock even wall caving, collapsing falls.Tunnel crag wall caving or collapse falls behind in case link up the deep geopressured aquifer, then can cause water burst even the gushing water in tunnel, brings threat to tunnel transportation and safety, is having a strong impact on mine production, and is improving anti-cost and the pressure of harnessing the river of mine.
Because roadway surrounding rock is in water burst and broken state, the method that adopts conventional shallow layer grouting reinforcement to construct formation slip casting water proof rock cap is difficult to prove effective, and when slip casting, grouting pressure also can disturbance destroy roadway surrounding rock, after the rock cap that blocks water forms, along with the minimizing of bleeder quantity, aquifer hydraulic pressure will raise gradually, is enough to destroy the rock cap that blocks water up to its pressure.When especially in the deep geopressured aquifer being carried out slip casting, the acting in conjunction of grouting pressure and hydraulic pressure often also can destroy the rock cap that blocks water, and causes the tunnel water burst again.The one of the main reasons of water burst appears in the slip casting process that Here it is or tunnel again after a period of time through grouting for water blocking.
The utility model content
The purpose of this utility model is exactly in order to address the above problem, provide a kind of tunnel broken water burst country rock internal drilling sleeve pipe every pressing infiltration sealing grouting device, the water burst reduction stage of isolating roadway surrounding rock, make the sealing grouting pressure to sleeve pipe be difficult to act on the water burst breaking surrounding rock, by slip casting, grouting pressure is acted on the intact rock, and make slurry infiltration enter into the interior water guide crack of intact rock, by slurry infiltration diffusion shutoff tunnel water burst, and reach safety and be lowered to sleeve pipe and guarantee the purpose of sleeve pipe sealing quality, it has and has solved the destruction of grouting pressure to the water burst breaking surrounding rock, has avoided the distortion of roadway surrounding rock and the advantage that collapses.
To achieve these goals, the utility model adopts following technical scheme:
Tunnel broken water burst country rock internal drilling sleeve pipe is every pressing infiltration sealing grouting device, it comprise and together every compression swelling slurry casting machine and osmotic grouting pipe; Also be referred to as every pressing the osmotic grouting device every compression swelling slurry casting machine and osmotic grouting pipe together;
Described every the compression swelling slurry casting machine comprise successively connect every compression swelling slurry casting machine Grouting Pipe joint, first pipe valve, first pressure meter, every compression swelling slurry casting machine end, every compression swelling slurry casting machine Grouting Pipe and plug, describedly be processed into the gingival cyst of mucous gland in the newborn button every compression swelling slurry casting machine Grouting Pipe two ends, described every the periphery of compression swelling slurry casting machine Grouting Pipe parcel one deck expansion cloth, the two ends of described expansion cloth are fixed on gingival cyst of mucous gland in the newborn by bandage and buckle, and what described expansion cloth was interior is provided with several spout holes every compression swelling slurry casting machine Grouting Pipe;
Described osmotic grouting pipe comprises osmotic grouting union, second pipe valve, second pressure meter that connects successively.
Describedly process with the PPR pipe every the compression swelling slurry casting machine, specification is S2, dn25mm * en2.5mm.
Described expansion cloth is the soft higher chemical fabric of density, and described chemical fabric length is than the long 2m of roadway surrounding rock zone of fracture thickness, and the width of described chemical fabric is 1.3 times of the boring girth, and described chemical fabric is long tubular.
The length of described gingival cyst of mucous gland in the newborn button is 300mm.
The effective PPR pipe of described osmotic grouting processes, and specification is S2, dn25mm * en2.5mm.
Tunnel broken country rock internal drilling sleeve pipe is every pressing infiltration sealing grouting device, and it also comprises corer, sleeve pipe, aperture stop grouting plug and grouting pump.
One end of described corer is provided with coring bit, and an other end of described corer connects reducing joint, described reducing joint jointed rod.
Described sleeve pipe one end splicing sleeve joint, described casing joint connects the 3rd pipe valve, described sleeve pipe peripheral solder casing stabbing board.Described casing stabbing board is used for guaranteeing that sleeve pipe is positioned at the center of boring, and plays the effect that increases the outside moving resistance of sleeve pipe.
Described aperture stop grouting plug is provided with the slip casting short tube, and an end of described slip casting short tube is connected with the 3rd pressure meter and the 4th pipe valve in turn.
Described grouting pump adopts the little pump amount of low pressure grouting pump, selects pneumatic slurry casting pump or electronic grouting pump.The model of described pneumatic slurry casting pump can be: ZBQ-27/1.5; The model of described electronic grouting pump can be: 3NB75/2-4.
Tunnel broken country rock internal drilling sleeve pipe mainly comprises following job step every pressing infiltration sealing grouting process:
In the described step 1, drilling depth will surpass the tunnel broken country rock and enter in the complete rock stratum 3m at least, detects will carry out the prevention hole wall in the drilling construction and fall piece, the work of caving in, assurance is every pressing the osmotic grouting device to be lowered to smoothly in the boring, and boring aperture will surpass two ranks of borehole casing diameter.
The concrete steps of described step 2 are as follows: every pressing the osmotic grouting device to send in the boring, make it to be positioned at the center of boring, and fix; Being connected by snap joint with Φ 19mm high-pressure rubber pipe every compression swelling slurry casting machine Grouting Pipe joint, and Φ 19mm high-pressure rubber pipe other end is connected with grouting pump; Open first pipe valve, start grouting pump, with grouting pump stir every compression swelling slurry casting machine quick-set through every compression swelling slurry casting machine Grouting Pipe joint, first pipe valve, in compression swelling slurry casting machine Grouting Pipe and spout hole are injected into the confined space that expansion cloth forms, along with the increase every compression swelling slurry casting machine quick-set of injecting, expansion cloth constantly swells, and expansion cloth tightly is pressed on the hole wall.Expansion cloth expand the back adapt to hole wall irregular surface and and hole wall combine closely; When grouting pressure reaches the grouting pressure setting value, stop slip casting, close first pipe valve and time with fixed attention; Frictional force between compression swelling slurry casting machine and hole wall is born the grouting pressure in the boring, and grouting pressure has been acted on the more complete rock stratum in deep; Described grouting pressure setting value is 1.5～2.0MPa; The time that described time is coagulated according to slip casting before to determining every the on-the-spot solidification experiments of compression swelling slurry casting machine quick-set.
The concrete steps of described step 3 are as follows: after the compression swelling slurry casting machine was waited the bundle that condenses, an end of osmotic grouting union connection Φ 19mm high-pressure rubber pipe, the other end of Φ 19mm high-pressure rubber pipe was connected with grouting pump; Open second pipe valve, start grouting pump, the injecting paste material slurries that stir are injected in the naked hole of boring by the osmotic grouting pipe, part injecting paste material slurries permeate diffusion towards periphery by the water guide crack in the more complete rock stratum of borehole wall, and shutoff water guide crack, another part injecting paste material slurries are then carried in the crag of tunnel superficial part country rock by water burst by the water guide crack and spread in the zone of fracture, when the slurry phenomenon appears running in zone of fracture in the crag, utilize and end paste-making method and end slurry; Stop slip casting when grouting pressure reaches ending standard, close second pipe valve and time with fixed attention; After time is condensed and restrainted, locate blocking every compression swelling slurry casting machine and osmotic grouting pipe in the aperture; Described ending standard is 2.0-3.0MPa.
Infiltration is filled into injecting paste material slurries in the zone of fracture of water guide crack and breaking surrounding rock condense after, rock crusher is taken up reinforcement effect, breaking surrounding rock is become the slip casting sealing with certain pressure-bearing and water-resisting ability adds solid.
The paste-making method that ends of described step 3 comprises two kinds:
Method one is regulated injecting paste material grout coordinate ratio parameter, shortens the setting time of injecting paste material slurries;
Method two adopts tiny aggregates such as adding a small amount of sawdust in the injecting paste material slurries, stops up bigger race slurry space, reaches the purpose of ending slurry.
The concrete steps of described step 4 are as follows: use the coring bit than the little two-stage of former boring aperture to creep into cleaning bottom of hole, drilling tool creeps into also taking out every compression swelling slurry casting machine and osmotic grouting pipe at the open-work in pressing the osmotic grouting device after the expansion; After the taking-up, form one in the hole by the reservation ring-type sealing collar that forms every compression swelling slurry casting machine quick-set concrement.
The reservation ring-type sealing collar that occurs in the described step 4 is used for having kept systematicness and the integrality of the internal drilling of roadway surrounding rock zone of fracture, and plays hole wall and the effect that blocks water safeguarded.
The concrete steps of described step 5 are as follows: use the drill bit with step 4 same diameter to continue to creep into the projected depth 0.5m place that exceeds sleeve pipe, be lowered to sleeve pipe in boring, and the sealing technology of borehole casing is routinely carried out sealing to sleeve pipe.
The sealing technology of the borehole casing of the routine of described step 5 is that example describes with the elevation angle, down-hole borehole casing sealing technology: fill in the aperture stop grouting plug in the annular gap of aperture place's sleeve pipe and boring, reserve the slip casting short tube in the stop grouting plug of aperture, the slip casting short tube outside connects the 3rd pressure meter and the 4th pipe valve successively, after connecting, open the 4th pipe valve and the 3rd pipe valve earlier, by the 4th pipe valve and slip casting short tube sprue bushing sealing slip liquid in boring and the sleeve pipe annular gap, sleeve pipe sealing slip liquid is migrated in the hole along sleeve pipe sealing material traffic direction, arrival hole baselap is crossed sleeve bottom and is entered sleeve pipe, flow out from casing joint and the 3rd pipe valve the back, after sleeve pipe sealing slip liquid flows out from the 3rd pipe valve, close the 3rd pipe valve, continue slip casting, after grouting pressure reaches design load, close the 4th pipe valve, wait and coagulate.
In the sleeve pipe sealing slip liquid grout of described step 5, sleeve pipe sealing slip liquid carries out filling and blocking to water guide crack in the disclosed hole wall rock of holing, to keep certain grouting pressure in the slip casting, make sleeve pipe sealing slip liquid can in the water guide crack, have certain diffusion length, to improve sleeve pipe sealing quality.Described grouting pressure generally is no more than 3.0MPa, and requires to determine according to crag integrated degree and slurry injection technique.
The concrete steps of described step 6 are as follows: after waiting the bundle that condenses, unload casing joint and the 3rd pipe valve, and clear up the material for sealing in clean casing joint and the 3rd pipe valve.In sleeve pipe, be lowered to drilling tool and carry out cleaning bottom of hole, the cleaning bottom of hole degree of depth arrives at the bottom of the boring hole, use the clear water wash boring, after rinsing well, mounting sleeve joint and the 3rd pipe valve again, and by the sleeve pipe water filling, carry out sleeve pipe sealing withstand voltage test, withstand voltage qualified after, lay down casing joint and the 3rd pipe valve, be lowered to drilling tool in the sleeve pipe and continue to creep into to earth formation deep.
The problem that should note in the utility model operation
(1) should first inspecting hole, detect out the thickness of back rock crusher band, position and the cranny development situation thereof of the complete country rock in the above deep of zone of fracture are carried out core drill in case of necessity and are advanced.
(2) be lowered to will surpass more than the thickness 2m of rock crusher band every compression swelling slurry casting machine length in the boring, should be able to effectively isolate zone of fracture, really play every the effect of pressing.
(3) expansion cloth is loose, expansion cloth will with tie every the compression swelling slurry casting machine, be processed into the gingival cyst of mucous gland in the newborn button-type every the position of compression swelling slurry casting machine binding expansion cloth.Leakage phenomenon must not appear in the binding part, after carrying out, will test before being lowered to boring, and when water injection test result did not have leakage when pressure reaches 1.5～2.0MPa, it was qualified to make every the compression swelling slurry casting machine.Otherwise forbidden to be lowered in the boring.
(4) will carry out field trial to used injecting paste material before the slip casting, obtain relevant parameter, described relevant parameter mainly refers to initial set and parameters such as final setting time, consolidation strength, to guarantee grouting quality and slip casting safety.
(5) grouting pump will guarantee to run well, and grouting pipeline will be accomplished to connect tight nothing and leak.
The supporting injecting paste material of the utility model is selected
Selection to supporting injecting paste material will be followed following principle: be convenient to buying, material source is extensive, low price, safety non-toxic, pollution-free, preparation and instillation process are simple, handling safety, the site operation personnel grasps easily, and consolidation strength and setting time are adjustable, and suitable engineering characteristic.
Quick hardening sulphoaluminate cement condenses soon because having, and early strength height (one day compressive strength can reach more than 70% of 28 days intensity) generally can produce higher intensity behind aquation 4-8h.Tie when hard volume do not shrink and slightly expand (microdilatancy), performances such as anti-sulfate attack.The important feature of sulphate aluminium cement is exactly rapid condensation, and the initial setting time, final setting time was earlier than 30min earlier than 15min.
As preferred injecting paste material of the present utility model, sulphate aluminium cement can be used to slip casting in compression swelling slurry casting machine expansion cloth, slip casting and to borehole casing sealing slip casting in the intact rock water guide crack.
In the on-the-spot preparation, the quick hardening sulphoaluminate cement of the qualified nothing caking of service property (quality), cement grade is 32.5R, and the control of cement paste preparation density range is at 1.3-1.5g/cm
3Between.
In the described step 2 in the compression swelling slurry casting machine sealing slip casting to select density for use be 1.5g/cm
3Cement paste;
Osmotic grouting will be according to field condition in the intact rock layer water guide crack in the described step 3, selection 1.3-1.5g/cm
3Between cement paste.The slip casting incipient stage is selected the less cement paste of density for use, when the tunnel broken country rock runs slurry when serious, can strengthen concentration of slurry gradually even add fines such as a certain amount of sawdust, reaches and only starches purpose;
It is 1.5g/cm that density is selected in the inner sleeve sealing slip casting of holing in the described step 5 for use
3Cement paste.
Grouting pump of the present utility model is selected
Because the slurries amount that slip casting and borehole casing sealing slip casting consume in compression swelling slurry casting machine expansion cloth is less, and the country rock compressive resistance is lower; And osmotic grouting requires slurry flow rate lower so that deposition is condensed in the intact rock water guide crack, therefore should select to use the little pump amount of low pressure grouting pump.Can select to use pneumatic slurry casting pump (such as ZBQ-27/1.5 pneumatic slurry casting pump) or electronic grouting pump (such as the 3NB75/2-4 grouting pump) according to on-the-spot power resources.
The beneficial effects of the utility model:
1, better solved a borehole casing sealing difficult problem under the back country rock water burst broken condition;
2, it has adopted every pressing penetration theory, grouting pressure in the sleeve pipe sealing is not acted directly on the water burst breaking surrounding rock, but act on the intact rock in deep, better solved the destruction problem of grouting pressure to the water burst breaking surrounding rock, avoided the distortion of roadway surrounding rock and collapsed;
3 and the infiltration by injecting paste material, shutoff the water guide crack, improved the sealing quality of sleeve pipe;
4, being processed into gingival cyst of mucous gland in the newborn every the position of the binding expansion cloth of compression swelling slurry casting machine buckles better fixed expansion cloth and plays the better seal effect.
Description of drawings
Fig. 1 (a) is every compression swelling slurry casting machine structure chart;
Fig. 1 (b) is osmotic grouting duct ligation composition;
Fig. 2 is every pressing osmotic grouting operating procedure figure;
Fig. 3 is that cleaning bottom of hole takes out in the boring every pressing osmotic grouting device operating procedure figure;
Fig. 4 is borehole casing slip casting sealing technological operation schematic diagram;
Wherein: 1 every compression swelling slurry casting machine Grouting Pipe joint, 2 first pipe valves, and 3 every compression swelling slurry casting machine end, 4 bandages, 5 every compression swelling slurry casting machine Grouting Pipe, 6 spout holes, 7 expansion cloth, 8 gingival cyst of mucous gland in the newborn buttons, 9 plugs, 10 first pressure meters, 11 osmotic grouting unions, 12 second pipe valves, 13 second pressure meters, 14 osmotic grouting pipes, 15 crags, 16 zone of fracture, 17 first water guide cracks, 18 more complete rock stratum, 19 naked holes, 20 expansion cloth, 21 every compression swelling slurry casting machine quick-set, 22 the 4th pipe valves, 23 drilling rods, 24 reducing joints, 25 corers, 26 reserve ring-type sealing collar, 27 coring bits, 28 every pressing osmotic grouting device, 29 casing joints, 30 sleeve pipes, 31 aperture stop grouting plugs, 32 slip casting sealing add solid, 33 country rocks, 34 sleeve pipe sealing slip liquid, 35 casing stabbing boards, 36 second water guide cracks, 37 sleeve pipe sealing material traffic directions, 38 annular gaps, 39 slip casting short tubes, 40 the 3rd pressure meters, 41 the 3rd pipe valves, 42 every the compression swelling slurry casting machine.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Tunnel broken water burst country rock internal drilling sleeve pipe is every pressing infiltration sealing grouting device, it comprise and together one every compression swelling slurry casting machine 42 and an osmotic grouting pipe 14; Also be referred to as every pressing osmotic grouting device 28 every compression swelling slurry casting machine 42 and osmotic grouting pipe 14 together.
Shown in Fig. 1 (a), described every compression swelling slurry casting machine 42 comprise successively connect every compression swelling slurry casting machine Grouting Pipe joint 1, first pipe valve 2, first pressure meter 10, every compression swelling slurry casting machine end 3, every compression swelling slurry casting machine Grouting Pipe 5 and plug 9, describedly be processed into the gingival cyst of mucous gland in the newborn button every compression swelling slurry casting machine Grouting Pipe 5 two ends, described every the periphery of compression swelling slurry casting machine Grouting Pipe 5 parcel one deck expansion cloth 7, the two ends of described expansion cloth 7 are fixed on gingival cyst of mucous gland in the newborn by bandage 4 and buckle on 8, are provided with several spout holes 6 every compression swelling slurry casting machine Grouting Pipe 5 in the described expansion cloth 7;
Shown in Fig. 2 (b), described osmotic grouting pipe 14 comprises osmotic grouting union 11, second pipe valve 12, second pressure meter 13 that connects successively.
Describedly process every compression swelling slurry casting machine 42 usefulness PPR pipes, specification is S2, dn25mm * en2.5mm.
Described expansion cloth 7 is soft higher chemical fabrics of density, and described chemical fabric length is than the long 2m of roadway surrounding rock zone of fracture 16 thickness, and the width of described chemical fabric is 1.3 times of the boring girth, and described chemical fabric is long tubular.
The length of described gingival cyst of mucous gland in the newborn button 8 is 300mm.
Described osmotic grouting pipe 14 usefulness PPR pipes process, and specification is S2, dn25mm * en2.5mm.
As shown in Figure 3, an end of described corer 25 is provided with coring bit 27, and an other end of described corer 25 connects reducing joint 24, described reducing joint 24 jointed rods 23.
As shown in Figure 4, described sleeve pipe 30 1 end splicing sleeve joints 29, described casing joint 29 connects the 3rd pipe valve 41, described sleeve pipe 30 peripheral solder casing stabbing boards 35.Described casing stabbing board 35 is used for guaranteeing that sleeve pipe 30 is positioned at the center of boring, and plays the effect that increases sleeve pipe 30 outside moving resistances.
Described aperture stop grouting plug 31 is provided with slip casting short tube 39, and an end of described slip casting short tube 39 is connected with the 3rd pressure meter 40 and the 4th pipe valve 22 in turn.
Described grouting pump adopts the little pump amount of low pressure grouting pump, selects pneumatic slurry casting pump or electronic grouting pump.The model of described pneumatic slurry casting pump can be: ZBQ-27/1.5; The model of described electronic grouting pump can be: 3NB75/2-4.
Tunnel broken country rock internal drilling sleeve pipe mainly comprises following job step every pressing infiltration sealing grouting process:
In the described step 1, drilling depth will surpass tunnel broken country rock 33 and enter in the more complete rock stratum 18 3m at least, detecting will carry out in the drilling construction prevents hole wall to fall piece, the work of caving in, assurance is every pressing osmotic grouting device 28 to be lowered to smoothly in the boring, and boring aperture will surpass two ranks of borehole casing 30 diameters.
As shown in Figure 2, the concrete steps of described step 2 are as follows: every pressing osmotic grouting device 28 and osmotic grouting pipe 14 to send in the lump in the boring, make it to be positioned at the center of boring, and fix; Being connected by snap joint with Φ 19mm high-pressure rubber pipe every compression swelling slurry casting machine Grouting Pipe joint 1, and Φ 19mm high-pressure rubber pipe other end is connected with grouting pump; Open first pipe valve 2, turn on pump with grouting pump stir every compression swelling slurry casting machine quick-set 21 through every compression swelling slurry casting machine Grouting Pipe joint 1, first pipe valve 2, in compression swelling slurry casting machine Grouting Pipe 5 and spout hole 6 are injected into the confined space that expansion cloth 7 forms, along with the increase every compression swelling slurry casting machine quick-set 21 of injecting, expansion cloth 7 constantly swells, and expansion cloth 7 tightly is pressed on the hole wall.Expansion cloth 7 expand the back adapt to hole walls irregular surface and and hole wall combine closely; When grouting pressure reaches the grouting pressure setting value, stop slip casting, close first pipe valve 2 and time and coagulate; Frictional force between compression swelling slurry casting machine 42 and hole wall is born the grouting pressure in the boring, and grouting pressure has been acted on the more complete rock stratum 18 in deep; Described grouting pressure setting value is 1.5～2.0MPa; The time that described time is coagulated according to slip casting before to determining every the on-the-spot solidification experiments of compression swelling slurry casting machine quick-set 21.
The concrete steps of described step 3 are as follows: after compression swelling slurry casting machine 42 was waited the bundle that condenses, an end of osmotic grouting union 11 connection Φ 19mm high-pressure rubber pipes, the other end of Φ 19mm high-pressure rubber pipe was connected with grouting pump; Open second pipe valve 12, open grouting pump, the injecting paste material slurries that stir are injected in the naked hole 19 of boring by osmotic grouting pipe 14, part injecting paste material slurries permeate diffusion towards periphery by the first water guide crack 17 in the more complete rock stratum 18 of borehole wall, and the shutoff first water guide crack, another part injecting paste material slurries are then carried diffusion in the zone of fracture 16 in the crag of tunnel superficial part country rock 33 by the first water guide crack 17 by water burst, and fixed formation slip casting sealing adds solid in zone of fracture 16; When the slurry phenomenon appearred running in zone of fracture in the crag 16, only utilizing, paste-making method ended slurry; Stop slip casting when grouting pressure reaches ending standard, close second pipe valve and time with fixed attention; After time is condensed and restrainted, locate blocking every compression swelling slurry casting machine 42 and osmotic grouting pipe 14, as shown in Figure 3 in the aperture; Described ending standard is 2.0-3.0MPa.
Infiltration is filled into injecting paste material slurries in the zone of fracture 16 of water guide crack and breaking surrounding rock 33 condense after, the zone of fracture 16 of country rock 33 is played reinforcement effect, breaking surrounding rock 33 is become the slip casting sealing with certain pressure-bearing and water-resisting ability adds solid 32.
The paste-making method that ends of described step 3 comprises two kinds:
Method one is regulated injecting paste material grout coordinate ratio parameter, shortens the setting time of injecting paste material slurries;
Method two adopts tiny aggregates such as adding a small amount of sawdust in the injecting paste material slurries, stops up bigger race slurry space, reaches the purpose of ending slurry.
As shown in Figure 3, the concrete steps of described step 4 are as follows: use the coring bit 27 than the little two-stage of former boring aperture to creep into cleaning bottom of hole, drilling tool creeps into also taking out every compression swelling slurry casting machine 42 and osmotic grouting pipe 14 at the open-work in pressing osmotic grouting device 28 after the expansion; After the taking-up, form one in the hole by the reservation ring-type sealing collar 26 that condenses and form every compression swelling slurry casting machine quick-set 21.
The reservation ring-type sealing collar 26 that occurs in the described step 4 is used for having kept systematicness and the integrality of 16 internal drillings of roadway surrounding rock 33 zone of fracture, and plays hole wall and the effect that blocks water safeguarded.
The concrete steps of described step 5 are as follows: use the drill bit with step 4 same diameter to continue to creep into the projected depth 0.5m place that exceeds sleeve pipe 30, be lowered to sleeve pipe 30 in boring, and the sealing technology of borehole casing routinely 30 is carried out sealing to sleeve pipe 30.
As shown in Figure 4, the sealing technology of the borehole casing 30 of the routine of described step 5 is that example describes with the elevation angle, down-hole borehole casing 30 sealing technologies: fill in aperture stop grouting plug 31 in the annular gap 38 of place, aperture sleeve pipe 30 and boring, reserve slip casting short tube 39 in the aperture stop grouting plug 31, slip casting short tube 39 outsides connect the 3rd pressure meter 40 and the 4th pipe valve 22 successively, after connecting, open the 4th pipe valve 22 and the 3rd pipe valve 41 earlier, by the 4th pipe valve 22 and slip casting short tube 39 sprue bushing sealing slip liquid 34 in boring and sleeve pipe 30 annular gaps 38, sleeve pipe sealing slip liquid 34 is migrated in the hole along sleeve pipe sealing material traffic direction 37, after arriving the hole baselap and crossing sleeve pipe 30 bottoms and enter sleeve pipe 30, sleeve pipe sealing slip liquid 34 flows out from casing joint 29 and the 3rd pipe valve 41, after sleeve pipe sealing slip liquid 34 flows out from the 3rd pipe valve 41, close the 3rd pipe valve 41, continue slip casting, after grouting pressure reaches design load, close the 4th pipe valve 22, wait and coagulate.
As shown in Figure 4, in sleeve pipe sealing slip liquid 34 slip castings of described step 5, filling and blocking is carried out in the second water guide crack 36 in the disclosed country rock 33 of 34 pairs of borings of sleeve pipe sealing slip liquid, to keep certain grouting pressure in the slip casting, make sleeve pipe sealing slip liquid 34 in the second water guide crack 36, have certain diffusion length, to improve sleeve pipe 30 sealing quality.Described grouting pressure generally is no more than 3.0MPa, and requires to determine according to crag 15 integrated degrees and slurry injection technique.
The concrete steps of described step 6 are as follows: after waiting the bundle that condenses, unload casing joint 29 and the 3rd pipe valve 41, and clear up the material for sealing in clean casing joint 29 and the 3rd pipe valve 41.In sleeve pipe 30, be lowered to drilling tool and carry out cleaning bottom of hole, the cleaning bottom of hole degree of depth arrives at the bottom of the boring hole, use the clear water wash boring, after rinsing well, mounting sleeve joint 29 and the 3rd pipe valve 41 again, open the 3rd pipe valve 41, and water fillings in the sleeve pipe 30, carry out sleeve pipe 30 sealing withstand voltage tests, withstand voltage qualified after, lay down casing joint 29 and the 3rd pipe valve 41, be lowered to drilling tool in the sleeve pipe 30 and continue to creep into to the bottom deep.
Embodiment:
Certain colliery put production run in March, 2010 into operation on October 16th, 2005.Designed productive capacity 2,400,000 t/a, the length of service is 52.4, is the hydrogeological conditions more complicated, is subjected to HTHP pore water and bump simultaneously and threatens more serious mine.In tunnelling or the working face mining, gushing water taking place often, poses a big pressure to mine drainage.
The normal fault that this ore deposit adhesive tape bord-up runs into a drop in driving be 2.2m, because back is mud stone at the tomography place, roof collapse, the bolt-spary supports mode is adopted with U-shaped canopy multilayer supporting, tunnel in the back.Footwall has an obvious issue, and water yield is 30m
3/ h.Through geological radar and bore detecting, roadway surrounding rock 33 water burst fragmentations, compressive resistance is extremely low, once causes tunnel local distortion in the slip casting, and deflection is up to 1.5cm.Showing that through hydrogeologic data the original hydraulic pressure in water burst aquifer is 6.5MPa, is 3.1MPa before the grouting for water blocking.
Through geological radar and the actual probe result that discloses of boring be: the cavity (analyze and be the space between roadway support layer and the rock stratum) about 1.2m is arranged more than the bolt-spary supports body, 1.2～4.5m scope is extremely broken mud stone layer, soaked by water burst for a long time, loosely organized, compressive resistance is low.Observing back has trickle in bulk, and trickle point distributes wider.Creep into middle borehole collapse, the bit freezing phenomenon is serious; 3.5m more than be siltstone and mud stone alternating layers, vertical cranny development, vertical crack includes water guide.Before implementing the utility model, once adopted water burst zone of fracture grouting and reinforcing is constituted the block water method of rock cap of slip casting, produce little effect, and occur back distortion, top board trickle point and water yield increase phenomenon in the Ceng Yinwei slip casting.
Adopt the utility model technology, 2 borings of successfully having constructed are respectively and annotate 1, annotate 2.
Annotating 1, annotating in 2 constructions, all by implementing every pressing osmotic grouting technology, boring safety is passed the water burst zone of fracture, and has guaranteed the sealing quality of borehole casing 30, for holing safety exposure aquifer and provide safety guarantee to aquifer slip casting.
Though above-mentionedly by reference to the accompanying drawings the specific embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (5)
1. tunnel broken water burst country rock internal drilling sleeve pipe is characterized in that every pressing infiltration sealing grouting device, it comprise and together every compression swelling slurry casting machine and osmotic grouting pipe; Described every the compression swelling slurry casting machine comprise successively connect every compression swelling slurry casting machine Grouting Pipe joint, first pipe valve, first pressure meter, every compression swelling slurry casting machine end, every compression swelling slurry casting machine Grouting Pipe and plug, describedly be processed into the gingival cyst of mucous gland in the newborn button every compression swelling slurry casting machine Grouting Pipe two ends, described every the periphery of compression swelling slurry casting machine Grouting Pipe parcel one deck expansion cloth, the two ends of described expansion cloth are fixed on gingival cyst of mucous gland in the newborn by bandage and buckle, and what described expansion cloth was interior is provided with several spout holes every compression swelling slurry casting machine Grouting Pipe; Described osmotic grouting pipe comprises osmotic grouting union, second pipe valve, second pressure meter that connects successively.
2. tunnel broken water burst country rock internal drilling sleeve pipe as claimed in claim 1 is characterized in that every pressing infiltration sealing grouting device, describedly processes with the PPR pipe every the compression swelling slurry casting machine.
3. tunnel broken water burst country rock internal drilling sleeve pipe as claimed in claim 1 is every pressing infiltration sealing grouting device, it is characterized in that, described expansion cloth is the soft higher chemical fabric of density, described chemical fabric length is than the long 2m of roadway surrounding rock zone of fracture thickness, the width of described chemical fabric is 1.3 times of the boring girth, and described chemical fabric is long tubular.
4. tunnel broken water burst country rock internal drilling sleeve pipe as claimed in claim 1 is characterized in that every pressing infiltration sealing grouting device the length of described gingival cyst of mucous gland in the newborn button is 300mm.
5. tunnel broken water burst country rock internal drilling sleeve pipe as claimed in claim 1 is characterized in that every pressing infiltration sealing grouting device the effective PPR pipe of described osmotic grouting processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736324 CN203035203U (en) | 2012-12-28 | 2012-12-28 | Pressure-isolating, permeating and cementing grouting device of borehole casing for roadway water-surrounded broken rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736324 CN203035203U (en) | 2012-12-28 | 2012-12-28 | Pressure-isolating, permeating and cementing grouting device of borehole casing for roadway water-surrounded broken rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035203U true CN203035203U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220736324 Expired - Fee Related CN203035203U (en) | 2012-12-28 | 2012-12-28 | Pressure-isolating, permeating and cementing grouting device of borehole casing for roadway water-surrounded broken rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035203U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758533A (en) * | 2014-01-06 | 2014-04-30 | 中国矿业大学 | High-low pressure integrated roadway grouting reinforcement method |
| CN105041341A (en) * | 2015-08-18 | 2015-11-11 | 山东大学 | Hole opening sealing device used for static pressure permeating rotary grouting of drill hole and using method thereof |
| CN106958433A (en) * | 2017-05-09 | 2017-07-18 | 中铁二十四局集团南昌铁路工程有限公司 | Move water treatment facilities and processing method in a kind of karst region |
| CN108729562A (en) * | 2018-06-08 | 2018-11-02 | 江苏省苏中建设集团股份有限公司 | A kind of waterproof plugging device |
| CN109209482A (en) * | 2018-10-11 | 2019-01-15 | 徐州中国矿大岩土工程新技术发展有限公司 | goaf grouting method and grouting device |
| CN111677448A (en) * | 2020-06-18 | 2020-09-18 | 中煤科工集团重庆研究院有限公司 | Variable-diameter casing hole-protecting drilling process for unstable stratum |
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2012
- 2012-12-28 CN CN 201220736324 patent/CN203035203U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758533A (en) * | 2014-01-06 | 2014-04-30 | 中国矿业大学 | High-low pressure integrated roadway grouting reinforcement method |
| CN103758533B (en) * | 2014-01-06 | 2015-12-30 | 中国矿业大学 | A kind of high-low pressure integratedization roadway grouting reinforcement means |
| CN105041341A (en) * | 2015-08-18 | 2015-11-11 | 山东大学 | Hole opening sealing device used for static pressure permeating rotary grouting of drill hole and using method thereof |
| CN106958433A (en) * | 2017-05-09 | 2017-07-18 | 中铁二十四局集团南昌铁路工程有限公司 | Move water treatment facilities and processing method in a kind of karst region |
| CN108729562A (en) * | 2018-06-08 | 2018-11-02 | 江苏省苏中建设集团股份有限公司 | A kind of waterproof plugging device |
| CN108729562B (en) * | 2018-06-08 | 2024-04-26 | 江苏国峰建设有限公司 | Waterproof plugging device |
| CN109209482A (en) * | 2018-10-11 | 2019-01-15 | 徐州中国矿大岩土工程新技术发展有限公司 | goaf grouting method and grouting device |
| CN111677448A (en) * | 2020-06-18 | 2020-09-18 | 中煤科工集团重庆研究院有限公司 | Variable-diameter casing hole-protecting drilling process for unstable stratum |
| CN111677448B (en) * | 2020-06-18 | 2022-01-28 | 中煤科工集团重庆研究院有限公司 | Variable-diameter casing hole-protecting drilling process for unstable stratum |
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Granted publication date: 20130703 Termination date: 20151228 |
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