CN109707339A - A kind of method for sealing of coal column grouting and reinforcing - Google Patents
A kind of method for sealing of coal column grouting and reinforcing Download PDFInfo
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- CN109707339A CN109707339A CN201910032260.XA CN201910032260A CN109707339A CN 109707339 A CN109707339 A CN 109707339A CN 201910032260 A CN201910032260 A CN 201910032260A CN 109707339 A CN109707339 A CN 109707339A
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Abstract
The present invention provides a kind of method for sealing of coal column grouting and reinforcing, including three steps: being to be drilled injected hole first, then grouting pipeline is laid according to certain order of connection in injected hole, then slip casting biliquid is prepared according to a certain ratio, finally the slip casting biliquid prepared is injected inside injected hole by grouting pump and mixer, slip casting section i.e. between hole packer and injected hole aperture also just completes the mortar leakage prevention processing of the grouting and reinforcing process of coal column when injected hole aperture is full of slurries.The good airproof performance that injected hole aperture is enabled to using slip-casting hole-sealing method of the invention, when grouting pressure is big aperture will not spillage, anchor shaft anchor cable hole spillage frequency is greatly reduced；Grout mixing increases, and grouting amount is more, and consolidation effect is obvious；Operating procedure of the invention is simple, can significantly improve slip casting working efficiency, and the first slip casting steel pipe connected between hole packer and floral tube can effectively improve the injection hole sealing effect of coal column.
Description
Technical field
The invention belongs to the technical fields of grouting and reinforcing method for sealing, and in particular to a kind of sealing of hole side of coal column grouting and reinforcing
Method.
Background technique
With the construction of socialist modernization, the consumption of the coal in China energy is dramatically increased, and Coal Energy Source reserves fall sharply,
The especially reserves of shallow-layer coal mine and open coal mine are sharply reduced.In order to provide lasting coal resources, coal mine for national development
Deep mining starts the stage in the epoch of climbing up.With the in-depth of exploitation, various problems are also following, for example crustal stress is high, lane
The presence for the objective problems such as road large deformation, Floor Heave in Roadway be serious, brings acid test to coal mine deep well exploitation.
Drift support type is very crucial in coal mine deep well exploitation, keeps tunnel unimpeded using roadway support steady with country rock
It is fixed to be of great significance to construction of coal mine and production.In order to solve roadway support problem, composite support mode is come into being, such as
Middle coal newly collects the diligent Dong Kuang of mouth, and to take high stress suspension roof support-slip casting modification-hydraulic fracturing pressure release Collaborative Control technology compound
Support pattern.
Wherein during grouting support in composite support, the modified biliquid note of micro-nano Inorganic whisker is generallyd use
Pulp material is as grout material and traditional grouting pipeline paving mode.Traditional paving mode is usually the slip casting in injected hole
Steel pipe connects hole packer, and floral tube is connected after hole packer.Slip casting, injected hole, bolthole, anchor cable are carried out using this paving mode
Hole and coal seam spillage are serious, greatly reduce grouting and reinforcing efficiency.
Accordingly, it is desirable to provide a kind of be directed to the insufficient improved technology scheme of the above-mentioned prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of method for sealing of coal column grouting and reinforcing, at least to solve current slip casting side
Spillage caused by formula is serious, and grouting amount is inadequate, and slurries diffusion is insufficient, the problem of so as to cause grouting and reinforcing inefficiency.
To achieve the goals above, the invention provides the following technical scheme:
A kind of method for sealing of coal column grouting and reinforcing, the method for sealing the following steps are included:
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer, forms injected hole, grouting pipeline is laid in injected hole；In injected hole by
It is lower from being above connected with floral tube, the first slip casting steel pipe, hole packer and the second slip casting steel pipe, the company of floral tube and the first slip casting steel pipe in turn
The junction of the place of connecing, the junction of the first slip casting steel pipe and hole packer and hole packer and the second slip casting steel pipe is equipped with pipe collar,
For being tightly connected grouting pipeline；
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, slip casting biliquid includes two kinds, respectively the first slurries
With the second slurries, the first slurries are uniformly mixed with water for sulphate aluminium cement after processing and are prepared；Second slurries are after handling
Gypsum carries out being mixed to form mixture after lime and processing, and then mixture is uniformly mixed with water and is prepared；
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by grouting pump and mixer
In injected hole, this section of section of hole packer position to drilling orifice position is slip casting section, is infused in slip casting section
Slurry completes the grouting and reinforcing process of coal column when injected hole aperture is full of slurries；After the filling of slip casting biliquid, in 2~10min
Interior solidification, to play the sealing function to injected hole.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that the first slip casting steel pipe has one or more,
The quantity of first slip casting steel pipe is arranged according to the depth length of injected hole, and pipe collar is used between two neighboring first slip casting steel pipe
It is tightly connected.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that the depth of the injected hole is 4~10m.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that the first slip casting steel pipe and second note
The length for starching steel pipe is 1~2m.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that aluminium sulfate after the processing in step (2)
Cement is yellow material, and according to weight fraction meter, Huang material includes 90~110 parts of sulphate aluminium cement, 1~3 part of water-reducing agent, early strength agent
0.5~1 part by being uniformly mixed；
Preferably, the sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that sulphate aluminium cement is pressed with water after the processing
According to mass ratio 1:(0.6~1) it is uniformly mixed, it is prepared into first slurries.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that lime and institute after the processing in step (2)
State processing after gypsum be white material, according to weight fraction meter, white material include 10~15 parts of lime, 85~90 parts of gypsum, water-reducing agent 1~
3 parts, 0.5~1 part of early strength agent by being uniformly mixed；
Preferably, the lime and the gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm；
Preferably, after the processing after lime and the processing mixture of gypsum and water according to mass ratio 1:(0.6~1)
It is uniformly mixed, is prepared into second slurries.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that the first slurry in step (3) in injection injected hole
The amount of liquid and the second slurries is equal.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that one end of the hole packer is additionally provided with cotton yarn,
The hole packer is enclosed with cotton yarn at injected hole orifice end, prevents slurries when slip casting from crossing hole packer to injected hole depths stream
It is dynamic.
In the method for sealing of coal column grouting and reinforcing as described above, it is preferable that the length in slip casting section described in step (3) is not
Less than 2m.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
On the one hand the method for sealing of coal column grouting and reinforcing of the invention uses new-type pipe laying mode, on the other hand exist
Slip casting section between hole packer and injected hole aperture carries out grouting and reinforcing so that slip-casting hole-sealing method of the invention have it is as follows
Excellent effect:
1, grouting pipeline paving mode of the invention is different from traditional grouting pipeline paving mode, it has unique spy
Point, such as the good airproof performance in injected hole aperture, when grouting pressure is big aperture will not spillage, anchor shaft anchor cable hole spillage frequency significantly subtracts
It is few；
2, after using slip-casting hole-sealing method of the invention, grout mixing increases, and grouting amount is more, and consolidation effect is bright
It is aobvious；
3, operating procedure of the invention is simple, can significantly improve slip casting working efficiency, connect between hole packer and floral tube
First slip casting steel pipe can effectively improve the injection hole sealing effect of coal column, and the first slip casting steel pipe quantity is more, i.e., floral tube is apart from slip casting
Hole aperture is remoter, and injection hole sealing effect is better.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.Wherein:
Fig. 1 is the paving mode of the grouting pipeline of the embodiment of the present invention 1；
Fig. 2 is the paving mode of the grouting pipeline of the embodiment of the present invention 2；
Fig. 3 is the paving mode of the grouting pipeline of the embodiment of the present invention 3；
Fig. 4 is the paving mode of the grouting pipeline of reference examples 1 of the present invention；
Fig. 5 is the paving mode of the grouting pipeline of reference examples 2 of the present invention；
Fig. 6 is the paving mode of the grouting pipeline of reference examples 3 of the present invention.
In figure: 1, floral tube；2, the first slip casting steel pipe；3, hole packer；4, the second slip casting steel pipe；5, pipe collar.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.
The method for sealing of coal column grouting and reinforcing provided by the invention is broadly divided into three steps, is by slip casting hole drill first
It is good, grouting pipeline then is laid according to certain order of connection in injected hole, it is double then to prepare slip casting according to a certain ratio
Liquid is finally injected the slip casting biliquid prepared inside injected hole by grouting pump and mixer, i.e. hole packer and injected hole hole
Slip casting section between mouthful also just completes the mortar leakage prevention of the grouting and reinforcing process of coal column when injected hole aperture is full of slurries
Processing.
Grouting strengthening method of the invention is easy to operate, can effectively improve grouting pressure and grouting amount, so that slip casting is expanded
It dissipates range to increase, slip casting aperture good airproof performance, from hole packer position to injected hole orifice position, this slip casting section is filled
There is slip casting biliquid, the first slurries and the second slurries solidify in 2~10min, so that sealing function is played, it is next in progress
When slip casting works, slurries will not be squeezed out further along drilling.Spillage will not be generated while improving grouting pressure, so that anchor pole,
Anchor cable hole spillage frequency is greatly reduced, and improves the working efficiency of grouting and reinforcing.
A kind of method for sealing of coal column grouting and reinforcing provided by the invention, comprising the following steps:
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer 3, forms injected hole, grouting pipeline is laid in injected hole；In injected hole
By lower from being above connected with floral tube 1, the first slip casting steel pipe 2, hole packer 3 and the second slip casting steel pipe 4, floral tube 1 and the first slip casting in turn
The connection of the junction of steel pipe 2, the junction of the first slip casting steel pipe 2 and hole packer 3 and hole packer 3 and the second slip casting steel pipe 4
Place is equipped with pipe collar 5, for being tightly connected grouting pipeline.
Preferably, the first slip casting steel pipe 2 has an one or more, and the quantity of the first slip casting steel pipe 2 is according to the depth of injected hole
Length is arranged, using the connection sealing of pipe collar 5 between two neighboring first slip casting steel pipe 2.
Preferably, the depth of injected hole is 4~10m (such as 4m, 5m, 6m, 7m, 8m, 9m, 10m).
Preferably, the length of the first slip casting steel pipe 2 and the second slip casting steel pipe 4 is 1~2m (such as 1m, 1.5m, 2m).
Preferably, one end of hole packer 3 is equipped with cotton yarn, is enclosed with cotton yarn at injected hole orifice end in hole packer 3, prevents
Only slurries are crossed hole packer 3 and are largely flowed to injected hole depths when slip casting.
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, slip casting biliquid includes two kinds, respectively the first slurries
With the second slurries, the first slurries are sulphate aluminium cement after processing and water according to mass ratio 1:(0.6~1) (such as 1:0.6,1:
0.65,1:0.7,1:0.75,1:0.8,1:0.85,1:0.9,1:0.95,1:1) be uniformly mixed be prepared；Second slurries are place
Lime and gypsum after processing mix after reason, form mixture, then mixture and water are according to mass ratio 1:(0.6~1) (such as 1:
0.6,1:0.65,1:0.7,1:0.75,1:0.8,1:0.85,1:0.9,1:0.95,1:1) be uniformly mixed be prepared；
Preferably, sulphate aluminium cement is yellow material after processing, and according to weight fraction meter, Huang material includes sulphate aluminium cement 90
~110 parts (such as 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts), 1~3 part of water-reducing agent
(such as 1 part, 2 parts, 3 parts), 0.5~1 part of early strength agent (such as 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part) are by uniformly mixing
It forms；More preferably, sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm.
Preferably, lime and gypsum after processing are white material after processing, and according to weight fraction meter, white material includes lime 10~15
Part (such as 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts), 85~90 parts of gypsum
(such as 85.5 parts, 86 parts, 86.5 parts, 87 parts, 87.5 parts, 88 parts, 88.5 parts, 89 parts, 89.5 parts), 1~3 part of water-reducing agent (ratio
Such as 1 part, 2 parts, 3 parts), 0.5~1 part of early strength agent (such as 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part) by uniformly mixing and
At；More preferably, lime and gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm.
Sulphate aluminium cement, lime and gypsum in the present invention are commercial product.
Water-reducing agent in the present invention is one of naphthalene water reducer, melamine water-reducing agent and polycarboxylate water-reducer.
Early strength agent in the present invention is one of inorganic salts, Chlorates and aluminium sulfate class, such as sodium chloride, chlorination
Calcium, sodium sulphate, sodium metaaluminate, aluminum sulfate, sodium metasilicate etc..
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by grouting pump and mixer
In injected hole, this section of section of 3 position of hole packer to drilling orifice position is slip casting section, is infused in slip casting section
Slurry completes the grouting and reinforcing process of coal column when injected hole aperture is full of slurries；After the filling of slip casting biliquid, in 2~10min
Solidification in (such as 3min, 4min, 5min, 6min, 7min, 8min, 9min), to play the sealing function to injected hole.
Preferably, the amount for injecting the first slurries and the second slurries in injected hole is equal.
Preferably, the length in slip casting section is not less than 2m.
Embodiment 1
A kind of method for sealing of coal column grouting and reinforcing provided by the invention, comprising the following steps:
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer 3, forms 4m depth injected hole, grouting pipeline is laid in injected hole；In 4m
Injected hole in by lower successively connect the first slip casting of 1m of pipe collar 5,1 pipe collar 5,1 of steel pipe 2,1 of 1 1m floral tube 1,1 from upper
The second slip casting of 1m of pipe collar 5,2 of hole packer 3,1 steel pipe 4 of 0.4m, as shown in Figure 1；In hole packer 3 towards injected hole aperture side
To one end wrap up some cotton yarns, cotton yarn is wrapped in the outside of the pipe collar 5 of hole packer 3 and the connection of the second slip casting steel pipe 4, prevents from infusing
Slurries are crossed hole packer 3 and are largely flowed to injected hole depths when slurry, cannot play a role so as to cause hole packer 3.
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, the quality of the first slurries and the second slurries is equal, takes
Huang material 25Kg is added in pneumatic agitator, and water 15Kg is then added and is uniformly mixed according to quality material-water ratio 1:0.6, stirs 2min,
The first slurries are formed after mixing, and white material 25Kg is added in another pneumatic agitator, and water 15Kg is then added and also presses quality
It is uniformly mixed than 1:0.6, stirs 2min, form the second slurries after mixing；
Wherein yellow material is that sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm, then with sulphur aluminic acid
100 parts of salt cement, 2 parts of naphthalene system class water-reducing agent, 0.5 part of sodium metaaluminate early strength agent.By being uniformly mixed, that is, sulphur aluminic acid is added
Salt cement 25Kg, water-reducing agent 0.5Kg, early strength agent 0.125Kg.
Wherein white material is that lime and gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm, then lime 12.5
Part, 87.5 parts of gypsum, 2 parts of naphthalene system class water-reducing agent, 0.5 part of sodium metaaluminate early strength agent process are uniformly mixed, i.e. addition lime
3.125Kg, gypsum 21.875Kg, water-reducing agent 0.5Kg, early strength agent 0.125Kg.
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by grouting pump and mixer
In injected hole, this section of section of 3 position of hole packer to drilling orifice position is slip casting section, slip casting section in the present embodiment
For 2m, slip casting is carried out in slip casting section, when injected hole aperture is full of slurries, that is, completes the grouting and reinforcing process of coal column, note
Slurry stops；After grouting serous fluid filling, is solidified in 8min, to play the sealing function to injected hole, complete the slip casting of coal column
The mortar leakage prevention of reinforcing process is handled.
Embodiment 2
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer 3, forms 5m depth injected hole, grouting pipeline is laid in injected hole；In 5m
It is bottom-up in injected hole successively to meet the first slip casting of 1m of pipe collar 5,2 pipe collar 5,1 of steel pipe 2,1 of 1 1m floral tube 1,1 0.4m
The second slip casting of 1m of pipe collar 5,2 of hole packer 3,1 steel pipe 4, as shown in Figure 2；In hole packer 3 towards the one of injected hole aperture direction
Some cotton yarns are wrapped up at end, and cotton yarn is wrapped in the outside of the pipe collar 5 of hole packer 3 and the connection of the second slip casting steel pipe 4, slurry when preventing slip casting
Liquid is crossed hole packer 3 and is largely flowed to injected hole depths, cannot play a role so as to cause hole packer 3.
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, the quality of the first slurries and the second slurries is equal, takes
Huang material 25Kg is added in pneumatic agitator, and water 15Kg is then added and is uniformly mixed according to quality material-water ratio 1:0.6, stirs 2min,
The first slurries are formed after mixing, and white material 25Kg is added in another pneumatic agitator, and water 15Kg is then added and also presses quality
It is uniformly mixed than 1:0.6, stirs 2min, form the second slurries after mixing；
Wherein yellow material is that sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm, then with sulphur aluminic acid
100 parts of salt cement, 1 part of melamine class water-reducing agent, 0.5 part of aluminum sulfate early strength agent process are uniformly mixed, i.e. addition aluminium sulfate
Cement 25Kg, water-reducing agent 0.25Kg, early strength agent 0.125Kg.
Wherein white material is that lime and gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm, then lime 12.5
Part, 87.5 parts of gypsum, 1 part of melamine class water-reducing agent, 0.5 part of aluminum sulfate early strength agent process are uniformly mixed, i.e. addition lime
3.125Kg, gypsum 21.875Kg, water-reducing agent 0.25Kg, early strength agent 0.125Kg.
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by grouting pump and mixer
In injected hole, this section of section of 3 position of hole packer to drilling orifice position is slip casting section, slip casting section in the present embodiment
For 2m, slip casting is carried out in slip casting section, when injected hole aperture is full of slurries, that is, completes the grouting and reinforcing process of coal column, note
Slurry stops；After grouting serous fluid filling, is solidified in 7min, to play the sealing function to injected hole, complete the slip casting of coal column
The mortar leakage prevention of reinforcing process is handled.
Embodiment 3
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer 3, forms 6m depth injected hole, grouting pipeline is laid in injected hole；In 6m
It is bottom-up in injected hole successively to meet the first slip casting of 1m of pipe collar 5,3 pipe collar 5,1 of steel pipe 2,1 of 1 1m floral tube 1,1 0.4m
3,2 the second slip casting of 1m steel pipes 4 of hole packer, as shown in Figure 3；One is wrapped up in the one end in hole packer 3 towards injected hole aperture direction
A little cotton yarns, cotton yarn are wrapped in the outside of the pipe collar 5 of hole packer 3 and the connection of the second slip casting steel pipe 4, prevent slurries when slip casting from crossing envelope
Hole device 3 is largely flowed to injected hole depths, cannot be played a role so as to cause hole packer 3.
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, the quality of the first slurries and the second slurries is equal, takes
Huang material 25Kg is added in pneumatic agitator, and water 25Kg is then added and is uniformly mixed according to quality material-water ratio 1:1, stirs 2min, mixes
The first slurries are formed after closing uniformly, white material 25Kg is added in another pneumatic agitator, and water 25Kg is then added also in mass ratio
1:1 is uniformly mixed, and is stirred 2min, is formed the second slurries after mixing；
Wherein yellow material is that sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm, then with sulphur aluminic acid
100 parts of salt cement, 2 parts of polycarboxylic acids dehydragent, 1 part of aluminum sulfate early strength agent process are uniformly mixed, i.e. addition aluminium sulfate
Cement 25Kg, water-reducing agent 0.5Kg, early strength agent 0.25Kg.
Wherein white material is that lime and gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm, then lime 12.5
Part, 87.5 parts of gypsum, 2 parts of polycarboxylic acids dehydragent, 1 part of aluminum sulfate early strength agent process are uniformly mixed, i.e. addition lime
3.125Kg, gypsum 21.875Kg, water-reducing agent 0.5Kg, early strength agent 0.25Kg.
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by grouting pump and mixer
In injected hole, this section of section of 3 position of hole packer to drilling orifice position is slip casting section, slip casting section in the present embodiment
For 2m, slip casting is carried out in slip casting section, when injected hole aperture is full of slurries, that is, completes the grouting and reinforcing process of coal column, note
Slurry stops；After grouting serous fluid filling, is solidified in 10min, to play the sealing function to injected hole, complete the slip casting of coal column
The mortar leakage prevention of reinforcing process is handled.
Embodiment 4
Embodiment 4 the difference from example 2 is that, in step (1) laying of grouting pipeline be: in the injected hole of 5m by
Under from the upper hole packer 3 for successively meeting 1 1m floral tube 1,1,2,1 pipe collar of the first slip casting of 2m of pipe collar 5,1 steel pipe, 5,1 0.4m,
1 pipe collar, 5,1 the second slip casting of 2m steel pipe 4；Other steps are identical as step in embodiment 2, and details are not described herein.
Embodiment 5
Embodiment 5 and the difference of embodiment 3 be, in step (1) laying of grouting pipeline be: in the injected hole of 6m by
Under from upper successively connect the first slip casting of 2m of pipe collar 5,1 1m the first slip casting steel pipe of pipe collar 5,1 of steel pipe 2,1 of 1 1m floral tube 1,1
The second slip casting of 2m of pipe collar 5,1 of hole packer 3,1 steel pipe 4 of 2,1 0.4m；Other steps are identical as step in embodiment 3,
This is repeated no more.
Embodiment 6
Embodiment 6 and the difference of embodiment 3 be, in step (1) laying of grouting pipeline be: in the injected hole of 6m by
Under from upper successively connect the first slip casting of 2m of pipe collar 5,1 1m the first slip casting steel pipe of pipe collar 5,1 of steel pipe 2,1 of 1 1m floral tube 1,1
The second slip casting of 1m of pipe collar 5,2 of hole packer 3,1 steel pipe 4 of 2,1 0.4m；Other steps are identical as step in embodiment 3,
This is repeated no more.
Reference examples 1
The difference of reference examples 1 and embodiment 1 is that the laying of the grouting pipeline in step (1) is: in the injected hole of 4m
By lower from upper 1m the second slip casting steel pipe of pipe collar 5,1 of hole packer 3,1 for successively meeting 3 1m floral tubes, 1,1 pipe collar, 5,1 0.4m
4, as shown in Figure 4；Furthermore the hole-sealing grouting consolidation process in step (3) is omitted；Other steps are identical as step in embodiment 1,
Details are not described herein.
Reference examples 2
The difference of reference examples 2 and embodiment 2 is that the laying of the grouting pipeline in step (1) is: in the injected hole of 5m
By lower from upper 1m the second slip casting steel pipe of pipe collar 5,1 of hole packer 3,1 for successively meeting 4 1m floral tubes, 1,1 pipe collar, 5,1 0.4m
4, as shown in Figure 5；Furthermore the hole-sealing grouting consolidation process in step (3) is omitted；Other steps are identical as step in embodiment 2,
Details are not described herein.
Reference examples 3
The difference of reference examples 3 and embodiment 3 is that the laying of the grouting pipeline in step (1) is: in the injected hole of 6m
By lower from upper 1m the second slip casting steel pipe of pipe collar 5,1 of hole packer 3,1 for successively meeting 5 1m floral tubes, 1,1 pipe collar, 5,1 0.4m
4, as shown in Figure 6；Furthermore the hole-sealing grouting consolidation process in step (3) is omitted；Other steps are identical as step in embodiment 3,
Details are not described herein.
After grouting pipe in Examples 1 to 3 and reference examples 1~3 is laid, the slurries of Examples 1 to 3 grouting and reinforcing
After solidification, slip casting is carried out to grouting pipe by grouting pump and mixer, records slip casting time, spillage frequency, grouting amount, slip casting
Pressure, and its grout spreading range is surveyed, as a result as shown in table 1 below.
Consolidation effect after the different embodiments of table 1 and reference examples slip casting
Under the same slip casting time it can be seen from data in table 1, the slip-casting hole-sealing method of Examples 1 to 3 in the present invention
Spillage frequency can be greatly reduced, grouting amount is significantly improved, and expand grout spreading range, improves grouting pressure.Three groups of notes
Slurry hole spillage frequency in turn reduces 80%, 93%, 93%, and grouting amount successively improves 200%, 233%, 257%, diffusion half
Diameter in turn increases 20%, 43%, 50%.
In summary: grouting pipe paving mode and method for sealing in the present invention can significantly improve slip casting effect, right
During grouting pipe carries out slip casting, slurries will not be squeezed out further along drilling.Leakage will not be generated while improving grouting pressure
Slurry, so that anchor pole, anchor cable hole spillage frequency are greatly reduced, improves the working efficiency of grouting and reinforcing.
In addition, the effective distance of injection hole sealing is longer, sealing of hole effect is better, i.e. effective envelope of the slip casting section more than or equal to 2m
Hole depth, in slip casting injected hole aperture will not spillage, slip casting section is bigger, and the second slip casting steel pipe quantity is more, sealing of hole effect
Better.The the first slip casting steel pipe connected between hole packer and floral tube also can effectively improve the injection hole sealing effect of coal column, the first note
Slurry steel pipe quantity is more, i.e., floral tube is remoter apart from injected hole aperture, and grouting consolidation effect is better.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method for sealing of coal column grouting and reinforcing, which is characterized in that the method for sealing the following steps are included:
(1) laying of grouting pipeline
It is drilled according to the aperture of hole packer, forms injected hole, grouting pipeline is laid in injected hole；In injected hole by it is lower from
On be connected with floral tube, the first slip casting steel pipe, hole packer and the second slip casting steel pipe, the connection of floral tube and the first slip casting steel pipe in turn
The junction of place, the junction of the first slip casting steel pipe and hole packer and hole packer and the second slip casting steel pipe is equipped with pipe collar, uses
In sealed connection grouting pipeline；
(2) grouting serous fluid is prepared
After the laying for completing grouting pipeline, start to prepare slip casting biliquid, slip casting biliquid includes two kinds, respectively the first slurries and the
Two slurries, the first slurries are uniformly mixed with water for sulphate aluminium cement after processing and are prepared；Second slurries are lime after processing
It carries out being mixed to form mixture with gypsum after processing, then mixture is uniformly mixed with water and is prepared；
(3) sealing of hole
After the completion of the preparation of slip casting biliquid, the first slurries prepared and the second slurries are injected by slip casting by grouting pump and mixer
In hole, this section of section of hole packer position to drilling orifice position is slip casting section, and slip casting is carried out in slip casting section, to
When injected hole aperture is full of slurries, that is, complete the grouting and reinforcing process of coal column；After the filling of slip casting biliquid, coagulated in 2~10min
Gu to play the sealing function to injected hole.
2. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that the first slip casting steel pipe has one
A or multiple, the quantity of the first slip casting steel pipe is arranged according to the depth length of injected hole, two neighboring first slip casting steel pipe it
Between using pipe collar be tightly connected.
3. the method for sealing of coal column grouting and reinforcing as claimed in claim 1 or 2, which is characterized in that the depth of the injected hole
For 4~10m.
4. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that the first slip casting steel pipe and institute
The length for stating the second slip casting steel pipe is 1~2m.
5. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that the processing in step (2)
Sulphate aluminium cement is yellow material afterwards, and according to weight fraction meter, Huang material includes 90~110 parts of sulphate aluminium cement, water-reducing agent 1~3
Part, 0.5~1 part of early strength agent process are uniformly mixed；
Preferably, the sulphate aluminium cement is levigate by airflow milling, and grain diameter is D95≤10 μm.
6. the method for sealing of coal column grouting and reinforcing as claimed in claim 1 or 5, which is characterized in that sulphur aluminic acid after the processing
Salt cement is with water according to mass ratio 1:(0.6~1) it is uniformly mixed, it is prepared into first slurries.
7. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that the processing in step (2)
Gypsum is white material after lime and the processing afterwards, and according to weight fraction meter, white material includes 10~15 parts of lime, gypsum 85~90
Part, 1~3 part of water-reducing agent, 0.5~1 part of early strength agent process are uniformly mixed；
Preferably, the lime and the gypsum are levigate by airflow milling, and grain diameter is D95≤10 μm；
Preferably, after the processing after lime and the processing mixture of gypsum with water according to mass ratio 1:(0.6~1) mix
Uniformly, second slurries are prepared into.
8. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that inject injected hole in step (3)
In the first slurries and the second slurries amount it is equal.
9. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that one end of the hole packer is also set
There is cotton yarn, is enclosed with cotton yarn at injected hole orifice end in the hole packer, prevents slurries when slip casting from crossing hole packer to note
Starch the flowing of hole depths.
10. the method for sealing of coal column grouting and reinforcing as described in claim 1, which is characterized in that slip casting area described in step (3)
Between length be not less than 2m.
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| CN201910032260.XA CN109707339B (en) | 2019-01-14 | 2019-01-14 | Hole sealing method for coal pillar grouting reinforcement |
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| CN201910032260.XA CN109707339B (en) | 2019-01-14 | 2019-01-14 | Hole sealing method for coal pillar grouting reinforcement |
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| CN110630292A (en) * | 2019-10-24 | 2019-12-31 | 河南理工大学 | Hole sealing and grouting reinforcement device and method for fractured coal rock mass |
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