CN108361002A - Drilling cement mortar hole sealing method for gas pressure test of large-depression-angle long-distance coal seam - Google Patents
Drilling cement mortar hole sealing method for gas pressure test of large-depression-angle long-distance coal seam Download PDFInfo
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- CN108361002A CN108361002A CN201810080731.XA CN201810080731A CN108361002A CN 108361002 A CN108361002 A CN 108361002A CN 201810080731 A CN201810080731 A CN 201810080731A CN 108361002 A CN108361002 A CN 108361002A
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- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 239000003245 coal Substances 0.000 title claims abstract description 39
- 239000011083 cement mortar Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 title claims description 45
- 239000004576 sand Substances 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920000742 Cotton Polymers 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000007569 slipcasting Methods 0.000 claims description 23
- 239000002002 slurry Substances 0.000 claims description 23
- 238000009530 blood pressure measurement Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 238000009955 starching Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 210000003097 mucus Anatomy 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a cement mortar hole sealing method for a large-depression-angle long-distance coal seam gas pressure test drill hole, and belongs to the technical field of coal mine safety production. The method designs two groups of baffle plates through two pressure measuring pipes, each group is formed by bundling and fixing a fixed baffle disc, a movable baffle disc and a rubber pad through iron wires, and the long-distance fixed-point plugging is carried out on the thick liquid by combining expanded cotton yarns and coarse sand bags, so that the problems of leakage and baffle plate burst of the thick liquid are solved; the problem that accumulated water in the drill hole is difficult to discharge is solved by inserting a grouting pipe into the drill hole in a bottom-up grouting mode; when secondary hole sealing is carried out, dry sand is blown in by compressed air, and the expanded cotton yarn and the accelerating agent are added into the hole opening section for stirring, so that the drilled hole is effectively blocked. The invention is a scientific, reliable, efficient and economic grouting hole sealing technology, can effectively carry out large-depression-angle long-distance hole sealing for coal bed gas pressure testing, ensures the accuracy of the coal bed gas pressure, has bright characteristics of convenient material source, simple processing and economic cost, is easy to master by workers, and can be widely popularized and used in coal mines.
Description
Technical field
The invention belongs to Safety of Coal Mine Production technical fields, and in particular to a kind of big angle of depression long range coal-bed gas pressure survey
Test boring cement mortar method for sealing.
Background technology
Coal mine gas is one of the principal element for causing mine safety accident, and coal-bed gas pressure is coal and gas prominent hair
Raw necessary power and necessary condition.The test of coal-bed gas pressure is New Built Mine, upgrading and extension plan, extends developing mine
Well, an important foundation sex work for producing mine, it arranges coal and gas prominent danger forecasting and reasonable protrusion-dispelling of working out
Shi Jun plays an important role.Therefore, Accurate Determining coal-bed gas pressure is highly important.
Currently, the method for test coal-bed gas pressure sealing of hole is broadly divided into capsule（Cushion rubber）- sealing mucus and slip casting two are big
Class, in order to accurately test the gas pressure of single coal bed, the general sealed borehole length of this two major classes is all not more than 20m.But for close
Apart from coal seam group, gas pressure or the pressure measurement position of opening distance across intermediate coal seam or seam test target coal seam are needed
Target coal seam farther out when, in order to accurately measure the gas pressure of target coal seam, rather than when comprehensive gas pressure, must be grown
Apart from sealing of hole, that is, blocked the intermediate coal seam drilled through or seam.
It is found by application live for many years, existing capsule（Cushion rubber）- sealing mucus and injection hole sealing technique, needle
To short distance, even less than 30m, hole sealing technology is ripe, is worked well, but general economic cost is higher, operational sequence
Complexity, worker are not easy to grasp, and for long range sealing of hole, the particularly greater than drilling of 50m, it is also necessary to solve clamper（Baffle）
Fixed point installation and fixation are not easy, while the problem of the internal water accumulation of angle of depression long drilled holes hole.Compared to capsule（Cushion rubber）- sealing mucus sealing of hole,
Water filling cement mortar sealing of hole, abbreviation injection hole sealing, required material are the common used material on coal mine, need not specially be bought, economical
Cost is relatively low, and operational sequence is also simple, and worker is easy to grasp.Based on this, for long range sealing of hole, especially high inclination-angle condition
Under, sealing of hole difficulty increases with the increase of length, with greater need for a kind of not only technically reliable, method for sealing easy to operate, also
It needs that its economic cost is low, convenient material drawing, then could more be widely used in coal mine, be truly realized " science, reliable, high
Effect, economy ".Therefore, it is very necessary to study big angle of depression long range coal-bed gas pressure testing bore holes cement mortar method for sealing.
Invention content
In order to solve existing long range sealing of hole, the present invention provides a kind of big angle of depression long range coal seam watt
This pressure test drills cement mortar method for sealing, not only " science, it is reliable, efficiently, it is economical ", going back emphasis, to solve the big angle of depression long
The technical barrier that the stifled slurry of distance drilling baffle fixed point and slip casting process mesoporous internal water accumulation are effectively discharged.
The technical scheme is that：A kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole side
Method includes the following steps：
1）It is φ 65~φ 95mm layer-through drillings from trepanning place to target coal seam construction diameter, drills through intermediate coal seam or coal
Line reaches 2~3m of target coal seam bottom plate and bores eventually, the ponding in cleaning drilling and hole slag；
2）Prefabricated certain length both ends have the pressure-measuring pipe and Grouting Pipe of silk mouth, and for connecting adjacent two pressure-measuring pipe or Grouting Pipe
Pipe fitting, it is spare；
3）Two pressure-measuring pipes are taken, are arranged respectively in the position for being close to baffle away from baffle is arranged at nozzle 40cm in every pressure-measuring pipe
Cotton yarn is expanded, cotton yarn grows 1~1.5m；It is pressure measurement tail pipe that sieve pore is processed on a pressure-measuring pipe wherein, in an other pressure-measuring pipe
On baffle to drilling hole bottom direction be arranged a length 50cm coarse sand bag, coarse sand bag diameter is the same as baffle diameter；
4）The pressure measurement pipe joint that aforementioned two are provided with baffle is connected, forms the pressure-measuring pipe with double baffles, first
It is sent into drilling, then prefabricated pressure measurement pipe joint is connected and is sequentially placed into drilling, keep pressure-measuring pipe total length super
Intermediate one layer of coal of lowest part or seam bottom plate at least 10m are crossed, or reaches the target coal seam top plate top positions 1~1.5m；To brill
During sending pipe in hole, pressure-measuring pipe is not pulled back and forth, after sending pipe to target location, then pulled at pressure-measuring pipe back and forth, made cotton
Yarn and coarse sand bag, which tighten, to be fixed, preferably until drawing is motionless；
5）Into drilling to send the identical method of pressure-measuring pipe to be sent into Grouting Pipe, it is to the baffle on pressure-measuring pipe to make Grouting Pipe total length
Retract the positions 2~3m；
6）Pressure-measuring pipe and Grouting Pipe are fixed in the outer tunnel that drills, after Grouting Pipe connects slip casting machine by slip casting high-pressure rubber pipe
The slip casting into drilling；Slip casting using constantly retreat in due course remove Grouting Pipe method carry out, i.e., according to injection slurries amount number,
Grouting Pipe is removed in due course, when removing Grouting Pipe, it is ensured that slip casting pipe end gos deep into cement mortar liquid level or less no less than 2m in hole, directly
It is largely flowed out from aperture completely to slurry night, first time sealing of hole is completed；
7）After interior institute's water filling cement mortar solidification shrinkage hole to be drilled, second of sealing of hole is carried out；
8）After the cement mortar solidification entirely to drill, mounting ball valve and pressure gauge can then start coal-bed gas pressure on pressure-measuring pipe
Test job.
High inclination-angle fixed point over long distances blocks, to process double baffles on two pressure-measuring pipes, combined expanded cotton yarn and thick
Sand pocket blocks slurry night；
The baffle is made of a fixed block plate, movable block plate and rubber cushion, and fixed block plate is welded on pressure-measuring pipe, in fixation
A movable block plate is arranged to drilling opening direction in block plate, and size is with fixed block plate, between fixed block plate and movable block plate
Rubber cushion is set, and rubber cushion size is 1.1 times of bore diameter, and cuts a seam every 120 ° on rubber cushion, cuts seam for totally three.
It is triangular in shape on the fixed block plate, movable block plate and rubber cushion to open three holes, for iron wire tie up fixed block plate,
Movable block plate and rubber cushion；
Step 6）When middle sealing of hole, slip casting constantly retreats the method for removing Grouting Pipe in due course using grouting mode from the bottom up
Carry out, with slurry continuous injection of the night from bottom hole, the ponding in drilling is also constantly discharged, according to injection slurries amount number,
Grouting Pipe is removed in due course, when removing Grouting Pipe, it is ensured that slip casting pipe end gos deep into cement mortar liquid level or less no less than 2m in hole, directly
It is largely flowed out from aperture completely to slurry night, first time sealing of hole is completed；
Step 7）In second of sealing of hole when, the solidification shrinkage situation of slurries in first observation drilling, first to drilling before contraction section grouting
The interior dry crude sand that at least about 1m long is blown into pressure wind, general 5~φ of the φ 8mm of coarse sand diameter, then pour into more sticky cement bonded sand
Slurry；It aperture 1m sections, in order to block drilling completely, stretches into stirring expansion cotton yarn and accelerator in hole with iron pipe and is blocked, most
Afterwards the whole plug-holes entirely to drill are completed after aperture area outside is whitewashed.
Beneficial effects of the present invention are：
1）The present invention is directed to big angle of depression long range coal-bed gas pressure testing bore holes, when prior art water filling cement mortar, on the one hand
Block pulp effect and hole internal water accumulation discharge critical issue cannot be efficiently solved, on the other hand its operating procedure is complicated, and worker is not easy
It grasps, a kind of basic problems such as raw material will specially be bought and price is not cheap, it is proposed that big angle of depression long range coal-bed gas pressure
Power testing bore holes cement mortar method for sealing.
2）Two groups of baffles of design, every group is made of a fixed block plate, a movable block plate and a rubber cushion again, then group
Expansion cotton yarn and coarse sand bag are closed, block pulp effect is good, effectively prevents the leakage of slurries and breaks through baffle.
3）The grouting mode from the bottom up of design efficiently solves drilling internal water accumulation over long distances and is not easy and cannot complete
Discharge problem, the sealing quality of guarantee.
4）Show that this method is a kind of injection hole sealing skill of " science, reliable, efficient, economy " by field application simultaneously
Art can be effectively performed the big angle of depression long range sealing of hole of coal-bed gas pressure test, ensure that the accurate survey of coal-bed gas pressure
Examination, distinct especially material source is convenient, and processing is simple, cost economy, and method is easy to worker's grasp, can be widely in coal
Mine is promoted the use of.
Description of the drawings
Fig. 1 is a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole schematic diagram；
Fig. 2 pressure-measuring pipe machining sketch charts；
Fig. 3 pressure measurement tail pipe machining sketch charts；
The fixed and movable block plate machining sketch charts of Fig. 4；
Fig. 5 rubber cushion machining sketch charts.
In figure：1-trepanning place；2-target coal seams；3-intermediate coal seams or seam；4-drillings；5-pressure-measuring pipes；6—
Grouting Pipe；7-fixed block plates；8-movable block plates；9-rubber cushions；10a-pressure measurement tail pipe；10b-pressure-measuring pipe（Band baffle）；11-
Sieve pore；12-expansion cotton yarns；13-coarse sand bags；14-cement mortar；15-cement mortar solidification shrinkage sections；16-ball valves；
17-pressure gauges；18-slip casting machines；19-slip casting high-pressure rubber pipes；20-holes；21-cut seam.
Specific implementation mode
Below in conjunction with the accompanying drawings, to a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole of the present invention
Method is described in further detail.
1）According to parameters such as the dip angle of hole of design, orientation, length, it is from trepanning place 1 to 2 construction diameter of target coal seam
φ 65~φ of φ 95mm drilling 4 passes through intermediate coal seam or seam 3, considers sediment factor, drilling 4 pass through target coal seam bottom plate 2~
3m is bored eventually, and pressure wind is accessed drilling rod, the ponding in preliminary cleaning drilling 4 and hole slag；
2）Since angle of depression dip angle of hole is big, hole spacing is long, and slip casting in order to prevent leaks and break through baffle, designs two groups of baffles,
Every group is made of 7, movable block plates 8 of a fixed block plate and a rubber cushion 9 again；
3）Pressure-measuring pipe 5 is processed into 2m mono- using the seamless galvanized iron conduits of 4 ＂, both ends processed filament mouth, and pipe fitting is used between pressure-measuring pipe 5
Connection.Two pressure-measuring pipes are taken, weld a fixed block plate 7 at pressure-measuring pipe 40cm respectively, block plate size is about bore diameter
80%~85%, one movable block plate 8 is set to drilling opening direction in fixed block plate 7, size is the same as fixed block plate.In fixed block plate
A rubber cushion 9 is designed between 7 and movable block plate 8, rubber cushion size is 1.1 times of bore diameter, and is cut every 120 ° on rubber cushion
One seam 21, cuts seam for totally three；It is triangular in shape on fixed block plate 7, movable block plate 8 and rubber cushion 9 to open three holes 20, it is used for iron wire
Tie up fixed block plate 7, movable block plate 8 and rubber cushion 9；
4）Two pressure measurement pipe joints for being welded with baffle connect, that is, constitute double baffles, be close to baffle respectively
Expansion cotton yarn 12 is bound in position with iron wire, and cotton yarn grows 1~1.5m.It is pressure measurement tail that sieve pore 11 is processed on a pressure-measuring pipe of front end
Pipe 10a, sieve pore 11 make a call to one group every 20cm, 90 ° of settings are intersected between two groups of sieve pores.To prevent slurry night leakage, in pressure-measuring pipe 10b
On baffle to drilling hole bottom direction be arranged a long 50cm coarse sand bag 13, general 5~φ of the φ 8mm of coarse sand diameter, sand pocket cloth
Common gauze as in mine, the generally same baffle dimensions of 13 diameter of coarse sand bag, both ends are banded in iron wire on pressure-measuring pipe 5；
5）By with double baffles pressure measurement tail pipe 10a and pressure-measuring pipe 10b be first sent into drilling 4, then by the pressure-measuring pipe 5 of 2m mono-
It is sequentially placed into drilling 4 with pipe fitting connection, when connecting pipe fitting, silk mouth need to be wound with raw material band, to ensure that junction seals
Effect.Pressure-measuring pipe total length requires more than intermediate coal seam or seam 3 bottom plate at least 10m, or reach 2 top plate top 1 of target coal seam~
1.5m position.During sending pipe into drilling 4, pressure-measuring pipe 5 is not pulled back and forth, after sending pipe to target location, then back and forth
Pressure-measuring pipe 5 is pulled at, so that expansion cotton yarn 12 and coarse sand bag 13 is tightened and fixes, preferably until drawing is motionless；
6）The big angle of depression drills over long distances, depend merely on pressure wind cannot Jiang Shui completely and the discharge of hole slag, the water in hole can directly affect
Cement mortar viscosity, and then influence sealing of hole effect.In order to solve this critical issue, design traditional grouting from top to bottom
Mode is changed to grouting mode from the bottom up, i.e., to send the same method of pressure-measuring pipe to be sent into Grouting Pipe 6, Grouting Pipe into drilling 4
6 are processed into 2m mono- using the seamless galvanized iron conduits of 4 ＂, and Grouting Pipe total length is to retract the positions 2~3m to first group of baffle；
7）Pressure-measuring pipe 5 and Grouting Pipe 6 are fixed in the outer tunnel that drills with tools such as iron wires, check pressure-measuring pipe 5 and Grouting Pipe 6
After plugging phenomenon, Grouting Pipe 6 starts the slip casting into drilling 4 after connecting slip casting machine 18 by slip casting high-pressure rubber pipe 19；Injection
Slurries are that cement, fine sand and accelerator of the label not less than 425 mix；Slip casting removes slip casting in due course using constantly retrogressing
The method of pipe carries out, and with slurry continuous injection of the night 14 from bottom hole, the ponding in hole is also constantly discharged, according to injection slurries amount
Number, in due course remove Grouting Pipe 6, remove Grouting Pipe 6 when, it is ensured that cement mortar liquid level or less is goed deep into 6 end of Grouting Pipe in hole
No less than 2m, until slurry night 14 largely flows out from aperture completely, first time sealing of hole is completed；
8）The solidification of cement bonded sand slurries will be shunk after slip casting, carry out second of sealing of hole.I.e. first time sealing of hole about for 24 hours after, observation
The solidification shrinkage situation of cement bonded sand slurries 14 in drilling 4, contraction section 15 are first blown at least about 1m into drilling 4 before being in the milk with pressure wind
Long dry crude sand, general 5~φ of the φ 8mm of coarse sand diameter, then more sticky cement mortar night is poured into until largely being flowed from aperture
Go out.For aperture 1m sections, in order to block drilling completely, stretches into stirring expansion cotton yarn and accelerator in hole with iron pipe and sealed
It is stifled, finally the whole plug-hole processes entirely to drill are completed after aperture area outside is whitewashed；
9）Second of sealing of hole about for 24 hours, i.e., after the solidification of the cement mortar that entirely drills, mounting ball valve 16 and pressure on pressure-measuring pipe 5
Table 17 can then start the test job of coal-bed gas pressure.
Certainly, the above is technical scheme of the present invention and unrestricted, it is noted that for the common of the art
For technical staff, without departing from the principle of the present invention, can to technical scheme of the present invention carry out it is several modification or
Person's equivalent replacement, these modifications or substitutions are also covered by the scope of the present invention.
Claims (5)
1. a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar method for sealing, which is characterized in that including with
Lower step：
1）From trepanning place（1）To target coal seam（2）Construction diameter is φ 65~φ 95mm layer-through drillings（4）, drilling（4）It passes through
Intermediate coal seam or seam（3）Reach target coal seam（2）2~3m of bottom plate is bored eventually, cleaning drilling（4）Interior ponding and hole slag；
2）Prefabricated certain length both ends have the pressure-measuring pipe and Grouting Pipe of silk mouth, and for connecting adjacent two pressure-measuring pipe or Grouting Pipe
Pipe fitting, it is spare；
3）Two pressure-measuring pipes are taken, are arranged respectively in the position for being close to baffle away from baffle is arranged at nozzle 40cm in every pressure-measuring pipe
Expand cotton yarn（12）, 1~1.5m of cotton yarn length；Wherein sieve pore is processed on a pressure-measuring pipe（11）For pressure measurement tail pipe（10a）, another
An outer pressure-measuring pipe（10b）On baffle to drilling hole bottom direction be arranged a length 50cm coarse sand bag（13）, coarse sand bag
（13）Diameter is the same as baffle diameter；
4）By aforementioned two pressure-measuring pipes for being provided with baffle（10a、10b）It is connected with pipe fitting, forming has double baffles
Pressure-measuring pipe is first sent into drilling（4）It is interior, then by prefabricated pressure-measuring pipe（5）It is connected with pipe fitting and is sequentially placed into drilling（4）
Interior, it is more than one layer of coal of intermediate lowest part or seam to make pressure-measuring pipe total length（3）Bottom plate at least 10m, or reach target coal seam（2）Top
The plate top positions 1~1.5m；During sending pipe into drilling, pressure-measuring pipe is not pulled back and forth, after sending pipe to target location,
It pulls at pressure-measuring pipe back and forth again, so that cotton yarn and coarse sand bag is tightened and fix, preferably until drawing is motionless；
5）To drilling（4）It is interior to send pressure-measuring pipe（5）Identical method is sent into Grouting Pipe（6）, it is to pressure measurement to make Grouting Pipe total length
Pipe（10b）On baffle retract the positions 2~3m；
6）By pressure-measuring pipe（5）And Grouting Pipe（6）It is fixed in the outer tunnel that drills, Grouting Pipe（6）Pass through slip casting high-pressure rubber pipe
（19）Connect slip casting machine（18）Backward drilling（4）Interior slip casting；Slip casting is carried out using the method for removing Grouting Pipe in due course is constantly retreated,
I.e. according to injection slurries amount number, remove Grouting Pipe in due course（6）, remove Grouting Pipe（6）When, it is ensured that Grouting Pipe in hole（6）
End gos deep into cement mortar liquid level or less and is no less than 2m, until slurry night（14）It is largely flowed out from aperture completely, first time sealing of hole is completed；
7）It is hole to be drilled（4）Interior institute's water filling cement mortar（14）After solidification shrinkage, second of sealing of hole is carried out；
8）After the cement mortar solidification entirely to drill, in pressure-measuring pipe（5）Upper mounting ball valve（16）And pressure gauge（17）Can then it start
The test job of coal-bed gas pressure.
2. a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole side according to claim 2
Method, every group of baffle is by a fixed block plate（7）, movable block plate（8）And rubber cushion（9）Composition；Fixed block plate（7）It is welded on pressure-measuring pipe
（5）On, in fixed block plate（7）To drilling opening direction, one movable block plate is set（8）, size is with fixed block plate, in fixation
Block plate（7）With movable block plate（8）Between rubber cushion is set（9）, rubber cushion size is 1.1 times of bore diameter, and on rubber cushion every
120 ° are cut a seam（21）, cut seam for totally three.
3. a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole side according to claim 2
Method, which is characterized in that the fixed block plate（7）, movable block plate（8）And rubber cushion（9）It is upper triangular in shape to open three holes（20）, use
Iron wire passes through three holes（20）Tie up fixed block plate（7）, movable block plate（8）And rubber cushion（9）.
4. a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole side according to claim 1
Method, which is characterized in that step 6）When middle sealing of hole, slip casting is constantly retreated using grouting mode from the bottom up and is removed note in due course
The method for starching pipe carries out, with slurry night（14）From the continuous injection of bottom hole, drilling（4）Interior ponding is also constantly discharged, according to
Inject slurries amount number, in due course remove Grouting Pipe 6, remove Grouting Pipe 6 when, it is ensured that cement is goed deep into 6 end of Grouting Pipe in hole
2m is no less than below Starch Level, until slurry night（14）It is largely flowed out from aperture completely, first time sealing of hole is completed.
5. a kind of big angle of depression long range coal-bed gas pressure testing bore holes cement mortar sealing of hole side according to claim 1
Method, which is characterized in that step 7）In second of sealing of hole when, first observation drilling（4）Interior slurries（14）Solidification shrinkage situation, grouting
Preceding elder generation is to drilling（4）The interior dry crude sand that at least about 1m long is blown into pressure wind, general 5~φ of the φ 8mm of coarse sand diameter, then pour into and compare
Sticky cement mortar；Aperture 1m sections, in order to block drilling completely, stirring expansion cotton yarn and accelerator in hole are stretched into iron pipe
It is blocked, finally completes the whole plug-holes entirely to drill after aperture area outside is whitewashed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810080731.XA CN108361002B (en) | 2018-01-28 | 2018-01-28 | Drilling cement mortar hole sealing method for gas pressure test of large-depression-angle long-distance coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810080731.XA CN108361002B (en) | 2018-01-28 | 2018-01-28 | Drilling cement mortar hole sealing method for gas pressure test of large-depression-angle long-distance coal seam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361002A true CN108361002A (en) | 2018-08-03 |
| CN108361002B CN108361002B (en) | 2020-10-02 |
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| CN201810080731.XA Active CN108361002B (en) | 2018-01-28 | 2018-01-28 | Drilling cement mortar hole sealing method for gas pressure test of large-depression-angle long-distance coal seam |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184672A (en) * | 2018-11-14 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | Coal seam depression angle drilling gas pressure measuring device and pressure measuring method |
| CN109441441A (en) * | 2018-11-15 | 2019-03-08 | 华北科技学院 | Seat earth multi-angle oblique bored grouting Analog Experiment for Discharges device and method under a kind of pressure-bearing influence of dynamic water |
| CN109469474A (en) * | 2018-12-05 | 2019-03-15 | 中国矿业大学(北京) | Based on the lower device and method for measuring multiple seam gas pressure simultaneously to layer-through drilling |
| CN110173231A (en) * | 2019-07-08 | 2019-08-27 | 中煤科工集团重庆研究院有限公司 | Long-distance downward drilling segmented compact hole sealing pressure measuring device and method |
| CN111927529A (en) * | 2020-09-11 | 2020-11-13 | 中煤科工集团重庆研究院有限公司 | Hole sealing device and external member for downlink pressure measurement drilling and use method of hole sealing device and external member |
| CN113107469A (en) * | 2021-05-06 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure by using underground long drill hole |
| CN113756742A (en) * | 2021-08-23 | 2021-12-07 | 山西兰花科创玉溪煤矿有限责任公司 | Secondary hole sealing method for coal mine underground gas drainage drill hole |
| CN114439412A (en) * | 2021-12-30 | 2022-05-06 | 陕西正通煤业有限责任公司 | Rapid hole sealing device and method for large-inclination 75 mm-diameter pressure measuring drill hole in well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184672A (en) * | 2018-11-14 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | Coal seam depression angle drilling gas pressure measuring device and pressure measuring method |
| CN109441441A (en) * | 2018-11-15 | 2019-03-08 | 华北科技学院 | Seat earth multi-angle oblique bored grouting Analog Experiment for Discharges device and method under a kind of pressure-bearing influence of dynamic water |
| CN109469474A (en) * | 2018-12-05 | 2019-03-15 | 中国矿业大学(北京) | Based on the lower device and method for measuring multiple seam gas pressure simultaneously to layer-through drilling |
| CN110173231A (en) * | 2019-07-08 | 2019-08-27 | 中煤科工集团重庆研究院有限公司 | Long-distance downward drilling segmented compact hole sealing pressure measuring device and method |
| CN111927529A (en) * | 2020-09-11 | 2020-11-13 | 中煤科工集团重庆研究院有限公司 | Hole sealing device and external member for downlink pressure measurement drilling and use method of hole sealing device and external member |
| CN111927529B (en) * | 2020-09-11 | 2022-03-25 | 中煤科工集团重庆研究院有限公司 | Hole sealing device and external member for downlink pressure measurement drilling and use method of hole sealing device and external member |
| CN113107469A (en) * | 2021-05-06 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure by using underground long drill hole |
| CN113107469B (en) * | 2021-05-06 | 2023-11-17 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure through underground long drilling |
| CN113756742A (en) * | 2021-08-23 | 2021-12-07 | 山西兰花科创玉溪煤矿有限责任公司 | Secondary hole sealing method for coal mine underground gas drainage drill hole |
| CN114439412A (en) * | 2021-12-30 | 2022-05-06 | 陕西正通煤业有限责任公司 | Rapid hole sealing device and method for large-inclination 75 mm-diameter pressure measuring drill hole in well |
| CN114439412B (en) * | 2021-12-30 | 2024-03-12 | 陕西正通煤业有限责任公司 | Quick hole sealing device and method for hole opening of underground large-dip-angle 75 mm-diameter pressure measurement drilling hole |
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