CN110439463A - Mined-out Area control injected hole pore-creating technique - Google Patents
Mined-out Area control injected hole pore-creating technique Download PDFInfo
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- CN110439463A CN110439463A CN201910702978.5A CN201910702978A CN110439463A CN 110439463 A CN110439463 A CN 110439463A CN 201910702978 A CN201910702978 A CN 201910702978A CN 110439463 A CN110439463 A CN 110439463A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/08—Measuring diameters or related dimensions at the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
Abstract
The invention discloses a kind of Mined-out Area control injected hole pore-creating techniques, comprising the following steps: Step 1: preparation of construction before drilling；Step 2: drill to goaf, it is specific as follows: 1, boring positioning；2, ensure hole deviation；3, drilling hole is away from, array pitch and Kong Xu；4, boring aperture and hole depth；5, wall-fixing method；6, drilling method；Step 3: the drilling to goaf is rinsed；And corresponding quality control method is formulated for drilling.Mined-out Area control injected hole pore-creating technique of the invention can be improved the forming accuracy for boring and making injected hole, to ensure going on smoothly for subsequent grouting process, provide basis to solve goaf geological problem.
Description
Technical field
The present invention relates to the based process and geological hazard control field of hydraulic engineering and corresponding engineering, in particular to a kind of
Mined-out Area control injected hole pore-creating technique and method of quality control.
Background technique
With greatly developing for national basis construction, comparison and choice and geological conditions become increasingly complex, and a large amount of mineral products
Exploitation is so that Goaf Area area is increasing.And it is interrogated to a series of environmental geotechnicals due to caused by gob collapse
Topic, such as land subsidence, road cracking, the decrease of cultivated land, often seriously affect the normal life of the people, great economy are caused to damage
It loses.
The experience for building engineering, especially hydraulic engineering on goaf both at home and abroad is seldom, and the construction experience of no maturation does not have
There are relevant Regulations and technical standard can refer to.Therefore, equipment, bore process, grouting process, grouting obstruction side are filled to brill
Formula etc. is tested, is studied, and research achievement is applied in Mined-out Area control engineering, has very important economic significance and society
It can meaning.
Summary of the invention
The purpose of the present invention is to provide a kind of Mined-out Area control injected hole pore-creating techniques, it more can accurately bore and make
Injected hole provides construction for subsequent grouting process and ensures.
Above-mentioned purpose of the invention has the technical scheme that
A kind of Mined-out Area control injected hole pore-creating technique, comprising the following steps:
Step 1: preparation of construction before drilling；
Step 2: drill to goaf, it is specific as follows:
S1, boring positioning: drilling hole location is according to design cloth hole principle, using total station and steel ruler setting-out, it is ensured that hole location deviation is not
Greater than 10cm, hole location label is carried out；
S2, ensure hole deviation: quadrupod is welded using heavy wall geological tube, quadrupod and drilling machine installation are connected, then vertical shaft is bored
All around four direction is controlled bar using horizontal ruler check, it is ensured that whole hole hole deviation is no more than 2 °；
S3, drilling hole are away from, array pitch and Kong Xu: major project fills the pitch-row of grout hole, array pitch uses 18m × 18m, points two in row
Sequence hole is constructed, according to the sequence grouting construction of II sequence after first I sequence；
Major project grout curtain is single row of holes construction, and grout curtain hole pitch-row uses 2.5m, the construction of three sequence holes is divided in row, according to
First after I sequence II sequence, III sequence again sequence grouting construction；
S4, boring aperture and hole depth: drilling open pore size preferably greater than two, whole hole aperture is differential, frequently with φ 130mm or φ
110mm, after being drilled into basement rock 5m, then variable diameter is that φ 89mm continues to creep into, until reaching hole termination depth；
Drilling hole, specifically to occur after significantly falling to bore phenomenon in boring procedure, continues drilling extremely as deep as to design hole depth requirement
Across 1~1.5m of seat earth, to ensure sufficiently to be disclosed by section is filled；
S5, wall-fixing method: drilling aperture is embedded to the protection casing of 108~127mm of φ to after going deep into basement rock 5m, quantitative to inject
The striaght cement slurries build-in pin of 0.5:1, anchorage length must not exceed basement rock segment length；
S6, drilling method: when bore operation, all drilling Unified numbers, and the construction order in each hole is indicated, drilling machine installation is smooth
After robust orthogonal, drilling construction should be by grouting procedure, and point sequence carries out；
Drilling method selection are as follows:
(1) loam layer drilling uses alloy bit, using bentonite slurry as circulation fluid retaining wall, middle and slow speed of revolution drilling；
(2) boulder bed drilling uses diamond thin-wall drill bit, using bentonite slurry as circulation fluid retaining wall, slow-speed of revolution drilling；
(3) rock section generally uses tunneling boring drill bit, long drill pipe, high speed drilling, using clear water as circulation fluid, does not have to halfway
It mentions and drills through core, reduce in drilling process plus drilling rod number, be greatly improved drilling efficiency；Meet the higher quartzy sandstone of intensity
When stratum, brill should be mentioned and use diamond thin-wall drill bit drilling instead；
Step 3: the drilling to goaf is rinsed.
By using above-mentioned technical proposal, grout hole is positioned within the scope of Mined-out Area control, according to coal measure strata situation system
Hole array pitch, the hole depth, aperture, hole deviation determined drilling method, and ensure to drill, so shaped grout hole can ensure subsequent filling
Sizing process is gone on smoothly, and provides basis to solve goaf geological problem.
The present invention is further arranged to: the preparation of step 1 is as follows:
S1, it builds operation platform: welding to form the biggish operation platform of supporting surface using channel steel or I-steel, by drilling machine and construction
Stage+module connection, drilling machine in place after operation platform bottom pad and consolidated；
S2, drilling device selection: the buried depth of coal mine gob is generally large, and coal measures body layer is complicated, and investment geology is bored in engineering
Machine, crawler type carry out produced on-site test with pipe drilling machine, down-the-hole drill and portable shallow bore hole drilling machine, are suitable for this work with selection
The drilling device on journey stratum, and suitable combination is selected according to Different Strata condition；
S3, drilling machine selection: the characteristics of being directed to goaf coal measures body layer, configuration alloy bit, diamond bit, tunneling boring close
Gold；Drilling rod is needed to select the different sizes such as φ 42mm, φ 50mm by actual borehole, using lock Threaded Connector Coupling.
By using above-mentioned technical proposal, go to be equipped with corresponding equipment and equipment for goaf coal measures body layer feature, with
Effectively overcome influence of the stratum to construction, to improve speed of application, reduces influence of the stratum to equipment or equipment service life.
The present invention is further arranged to: the flushing process of step 3 is as follows: the boring mud of loam layer, boulder bed passes through swelling
Outside the suspension effect band of native mud portals, it is discharged into being precipitated in mud overfall pond；Rock section is crept into using tunneling boring drill bit, is bored
The flow that clear water flushing liquor can be increased during hole, rock powder is gone out outside hole；It drills behind whole hole, does not mention brill and continue with pressure clear water
It rinses and is no less than 10min, the charges in rock fracture, gap are taken away, so that grout mixing increases when slip casting.
The present invention is further arranged to: in the S5 of step 1, while injecting striaght cement slurries, addition cement weight 1%~
3% accelerator accelerates the solidification of casing build-in cement grout.
The present invention is further arranged to: further including the quality control method for ensuring hole deviation, specifically such as in the S2 of step 1
Under,
(1) drilling machine is consolidated, the measure of castingin earth anchor fastening borer chassis is taken, is in drilling machine always in normal operation
Steady state；
(2) use reasonable drilling method and technical data, including accurately orient, control mechanical separator speed, without using be bent,
Sunken drilling rod；
(3) according to drilling situation, every 5m carries out an inclined hole measurement, understands drilling track in time.
The present invention is further arranged to: in the S2 of step 1, once discovery drilling is super inclined, being taken satisfactory after correcting as early as possible, is entangled
Inclined measure is as follows: base is stable, vertical shaft is in the right direction；Reinforce deviational survey frequency；Guiding facility is used when drilling variable diameter；Correct control
Drilling technology parameter processed, such as pressure, confluent, revolving speed；Reaming correction, drilling rod add guiding connector with righting drilling rod, lengthen drilling tool
It is oriented to, it is desirable that guiding making hole construction is done using lengthening drilling tool in the initial 20 meters of depth of aperture.
The present invention is further arranged to: further including the quality control method for ensuring pore-creating aperture, specifically in the S4 of step 1
It is as follows,
(1) drill bit that running check and replacement are worn in drilling；
(2) using old drill bit drilling when, its diameter is measured, it is ensured that the diameter of each more bit change is same or similar；
(3) it close to when whole hole section drilling, checks and replaces diameter drill bit drilling construction slightly bigger than normal and more intact.
The present invention is further arranged to: further including the quality control method for ensuring whole hole hole depth, specifically in the S4 of step 1
It is as follows,
(1) using steel wire as lining rope, plummet is fixed in one end, and the other end is connect with elevator, and every 5 meters are fixed a copper hoop and printed
Upper font size, while being checked using the qualified steel tape of inspection；
(2) it is measured simultaneously using two methods when measuring hole depth, i.e., remaining ruler on first measuring machine measures drilling rod and brill after trip-out
Have overall length, calculate whole hole hole depth, while to be measured again with plummet situations such as preventing in hole chip off-falling or collapse hole.
In conclusion the invention has the following advantages:
1, grout hole is positioned within the scope of Mined-out Area control, drilling method is formulated according to coal measure strata situation, and for drilling system
Fixed corresponding quality control method, to guarantee to bore the forming accuracy for making injected hole, with ensure subsequent grouting process it is smooth into
Row provides basis to solve goaf geological problem；
2, it goes to be equipped with corresponding equipment and equipment for goaf coal measures body layer feature, effectively to overcome stratum to the shadow of construction
It rings, to improve speed of application, reduces influence of the stratum to equipment or equipment service life.
Specific embodiment
Embodiment: a kind of Mined-out Area control injected hole pore-creating technique, including following process:
One, preparation of construction before drilling, preparation are as follows:
1, operation platform is built
It welds to form the biggish operation platform of supporting surface using channel steel or I-steel, drilling machine and operation platform installation is connected, bored
Machine in place after operation platform bottom pad and consolidated, to ensure construction stability requirement when operation.
2, drilling device selects
The buried depth of coal mine gob is generally large, and coal measures body layer is complicated, and geological drilling rig is put into engineering, and crawler type is bored with pipe
Machine, down-the-hole drill and portable shallow bore hole drilling machine carry out produced on-site test, are set with the drilling that selection is suitable for this engineering stratum
It is standby, and suitable combination is selected according to Different Strata condition.
3, drilling machine selects
The coal measures body layer successively Different Strata such as drill-through loess formation, boulder bed, rock section from top to down, features as poor geologic condition.For not
Alloy bit drilling can be used in the characteristics of with stratum, loess formation, and diamond bit drilling can be used in boulder bed, and rock section can be used
Tunneling boring drill bit drilling；Drilling rod is needed to select the different sizes such as φ 42mm, φ 50mm by actual borehole, using lock Threaded Connector Coupling.
Two, it drills to goaf, specific as follows:
1, boring positioning
Setting-out is measured according to the grout hole installation position of design requirement, it is ensured that hole location deviation is not more than 10cm, boring positioning
It uses equipment for total station and steel ruler, is used as position of opening after detection qualification is checked in management, carries out hole location label.
2, ensure hole deviation
Quadrupod is welded using heavy wall geological tube, quadrupod and drilling machine installation are connected, then to vertical shaft drilling rod all around four
A direction control is checked using horizontal ruler, it is ensured that vertical；Drillhole inclination survey is measured using KXP-1 type tester, to guarantee hole
To accurate, control measure are taken, it is ensured that whole hole hole deviation is no more than 2 °.
Specific hole deviation quality control method is as follows,
(1) drilling machine is consolidated, the measure of castingin earth anchor fastening borer chassis is taken, is in drilling machine always in normal operation
Steady state.
(2) reasonable drilling method and technical data are used, including is accurately oriented, is controlled mechanical separator speed, do not use
Bending, sunken drilling rod etc..
(3) according to drilling situation, can every 5m carry out an inclined hole measurement, understand drilling track in time.
Once taking satisfactory after correcting as early as possible, satisfactory after correcting is as follows it was found that drilling is super inclined:
Base is stable, vertical shaft is in the right direction；Reinforce deviational survey frequency；Longer drilling tool is used as far as possible；It to be used when drilling variable diameter
Guiding facility；The correctly drilling technologies parameter such as control pressure, confluent, revolving speed；Reaming correction, drilling rod add guiding connector to help
Positive drilling rod lengthens drilling tool and is oriented to, it is desirable that guiding making hole construction is done using lengthening drilling tool in the initial 20 meters of depth of aperture, because thus
The hole slope of hole depth influences whole hole hole slope maximum.
3, drilling hole is away from, array pitch and Kong Xu
Major project fills the pitch-row of grout hole, array pitch uses 18m × 18m, and a point two sequence holes are constructed in row, according to first I sequence
The sequence grouting construction of II sequence afterwards.
Major project grout curtain is single row of holes construction, and grout curtain hole pitch-row uses 2.5m, the construction of three sequence holes is divided in row,
According to first after I sequence II sequence, III sequence again sequence grouting construction.
4, boring aperture and hole depth
Boring aperture: open pore size preferably greater than two, whole hole aperture is differential, frequently with φ 130mm or φ 110mm, is drilled into basement rock
After 5m, then variable diameter is that φ 89mm continues to creep into, until reaching hole termination depth.
Drilling hole depth: reaching design hole depth requirement, specifically to occur in boring procedure after significantly falling to bore phenomenon, continues to bore
It proceeds to across 1~1.5m of seat earth, to ensure sufficiently to be disclosed by section is filled.
To ensure pore-creating aperture, following technical measures can be taken in construction:
(1) drill bit that running check and replacement are worn in drilling；
(2) using old drill bit drilling when, its diameter is measured, it is ensured that the diameter of each more bit change is same or similar；
(3) it close to when whole hole section drilling, checks and replaces diameter drill bit drilling construction slightly bigger than normal and more intact.
To ensure whole hole hole depth, following technical measures can be used in construction:
(1) using the steel wire of coefficient of dilatation very little as lining rope, the plummet of the fixed appropriate diameter in one end, the other end and elevator connect
It connects, every 5 meters are fixed a copper hoop and print upper font size, while being checked using the qualified steel tape of inspection.
(2) it is measured simultaneously using two methods when measuring hole depth, i.e., remaining ruler on first measuring machine measures drilling rod after trip-out
With drilling tool overall length, whole hole hole depth is calculated, while to be measured again with plummet situations such as preventing in hole chip off-falling or collapse hole.
5, wall-fixing method
Aperture drill to after going deep into basement rock 5m, is embedded to the protection casing (grout pipe can be doubled as) of 108~127mm of φ, it is quantitative to inject
The striaght cement slurries build-in pin of 0.5:1, anchorage length must not exceed basement rock segment length.For accelerate grout compartment drilling construction into
The accelerator of cement weight 1%~3% can be added in degree, accelerate the solidification of casing build-in cement grout.
6, drilling method
When bore operation, all drilling Unified numbers, and the construction order in each hole is indicated, after drilling machine installs smooth robust orthogonal,
Drilling construction should be by grouting procedure, and point sequence carries out.
Goaf drilling generally pass through from top to bottom loess formation, boulder bed, rock section (including bending band, fissure zone, inbreak
Band), for different stratum characteristics, following methods progress is can be used in drilling method:
(1) loess formation drilling uses alloy bit, using bentonite slurry as circulation fluid retaining wall, middle and slow speed of revolution drilling；
(2) boulder bed drilling uses diamond thin-wall drill bit, using bentonite slurry as circulation fluid retaining wall, slow-speed of revolution drilling；
(3) rock section generally uses tunneling boring drill bit, long drill pipe, high speed drilling, using clear water as circulation fluid, does not have to halfway
It mentions and drills through core, reduce in drilling process plus drilling rod number, be greatly improved drilling efficiency；Meet the higher quartzy sandstone of intensity
When stratum, brill should be mentioned and use diamond thin-wall drill bit drilling instead.
Three, bottom hole precipitating is rinsed
The boring mud of loam layer, boulder bed is portalled outer by the suspension effect band of bentonite slurry, into precipitating in mud overfall pond
Discharge；Rock section is crept into using tunneling boring drill bit, and the flow of clear water flushing liquor can be increased in boring procedure, rock powder is gone out hole
Outside；It drills behind whole hole, does not mention brill and continue to rinse no less than 10min with pressure clear water, by the charges band in rock fracture, gap
It walks, so that grout mixing increases when slip casting.
The hole of water is not returned in or aperture larger for drilling fluid loss, is to prevent from largely washing by water entering according to on-site actual situations
Tunnel repair is in the milk filling effect not in hole flushing.
Claims (8)
1. a kind of Mined-out Area control injected hole pore-creating technique, it is characterised in that: the following steps are included:
Step 1: preparation of construction before drilling；
Step 2: drill to goaf, it is specific as follows:
S1, boring positioning: drilling hole location is according to design cloth hole principle, using total station and steel ruler setting-out, it is ensured that hole location deviation is not
Greater than 10cm, hole location label is carried out；
S2, ensure hole deviation: quadrupod is welded using heavy wall geological tube, quadrupod and drilling machine installation are connected, then vertical shaft is bored
All around four direction is controlled bar using horizontal ruler check, it is ensured that whole hole hole deviation is no more than 2 °；
S3, drilling hole are away from, array pitch and Kong Xu: major project fills the pitch-row of grout hole, array pitch uses 18m × 18m, points two in row
Sequence hole is constructed, according to the sequence grouting construction of II sequence after first I sequence；
Major project grout curtain is single row of holes construction, and grout curtain hole pitch-row uses 2.5m, the construction of three sequence holes is divided in row, according to
First after I sequence II sequence, III sequence again sequence grouting construction；
S4, boring aperture and hole depth: drilling open pore size preferably greater than two, whole hole aperture is differential, frequently with φ 130mm or φ
110mm, after being drilled into basement rock 5m, then variable diameter is that φ 89mm continues to creep into, until reaching hole termination depth；
Drilling hole, specifically to occur after significantly falling to bore phenomenon in boring procedure, continues drilling extremely as deep as to design hole depth requirement
Across 1~1.5m of seat earth, to ensure sufficiently to be disclosed by section is filled；
S5, wall-fixing method: drilling aperture is embedded to the protection casing of 108~127mm of φ to after going deep into basement rock 5m, quantitative to inject
The striaght cement slurries build-in pin of 0.5:1, anchorage length must not exceed basement rock segment length；
S6, drilling method: when bore operation, all drilling Unified numbers, and the construction order in each hole is indicated, drilling machine installation is smooth
After robust orthogonal, drilling construction should be by grouting procedure, and point sequence carries out；
Drilling method selection are as follows:
(1) loam layer drilling uses alloy bit, using bentonite slurry as circulation fluid retaining wall, middle and slow speed of revolution drilling；
(2) boulder bed drilling uses diamond thin-wall drill bit, using bentonite slurry as circulation fluid retaining wall, slow-speed of revolution drilling；
(3) rock section generally uses tunneling boring drill bit, long drill pipe, high speed drilling, using clear water as circulation fluid, does not have to halfway
It mentions and drills through core, reduce in drilling process plus drilling rod number, be greatly improved drilling efficiency；Meet the higher quartzy sandstone of intensity
When stratum, brill should be mentioned and use diamond thin-wall drill bit drilling instead；
Step 3: the drilling to goaf is rinsed.
2. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the preparation of step 1
It works as follows:
S1, it builds operation platform: welding to form the biggish operation platform of supporting surface using channel steel or I-steel, by drilling machine and construction
Stage+module connection, drilling machine in place after operation platform bottom pad and consolidated；
S2, drilling device selection: the buried depth of coal mine gob is generally large, and coal measures body layer is complicated, and investment geology is bored in engineering
Machine, crawler type carry out produced on-site test with pipe drilling machine, down-the-hole drill and portable shallow bore hole drilling machine, are suitable for this work with selection
The drilling device on journey stratum, and suitable combination is selected according to Different Strata condition；
S3, drilling machine selection: the characteristics of being directed to goaf coal measures body layer, configuration alloy bit, diamond bit, tunneling boring close
Gold；Drilling rod is needed to select the different sizes such as φ 42mm, φ 50mm by actual borehole, using lock Threaded Connector Coupling.
3. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the flushing of step 3
Process is as follows: the boring mud of loam layer, boulder bed, is portalled by the suspension effect band of bentonite slurry outer, into mud overfall pond
Middle precipitating discharge；Rock section is crept into using tunneling boring drill bit, and the flow of clear water flushing liquor can be increased in boring procedure, rock powder is rushed
Portal outer；It drills behind whole hole, does not mention brill and continue to rinse no less than 10min with pressure clear water, by the filling in rock fracture, gap
Object is taken away, so that grout mixing increases when slip casting.
4. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the S5 of step 1
In, while injecting striaght cement slurries, the accelerator of cement weight 1%~3% is added, accelerates the solidifying of casing build-in cement grout
Gu.
5. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the S2 of step 1
In, it further include the quality control method for ensuring hole deviation, it is specific as follows,
(1) drilling machine is consolidated, the measure of castingin earth anchor fastening borer chassis is taken, is in drilling machine always in normal operation
Steady state；
(2) use reasonable drilling method and technical data, including accurately orient, control mechanical separator speed, without using be bent,
Sunken drilling rod；
(3) according to drilling situation, every 5m carries out an inclined hole measurement, understands drilling track in time.
6. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1 or 5, it is characterised in that: step 1
In S2, once discovery drilling is super inclined, take satisfactory after correcting as early as possible, satisfactory after correcting is as follows: base is stable, vertical shaft is in the right direction；Add
Strong deviational survey frequency；Guiding facility is used when drilling variable diameter；Correct control drilling technology parameter, such as pressure, confluent, revolving speed；
Reaming correction, drilling rod add guiding connector with righting drilling rod, lengthen drilling tool and are oriented to, it is desirable that use and add in the initial 20 meters of depth of aperture
Long drilling tool does guiding making hole construction.
7. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the S4 of step 1
In, it further include the quality control method for ensuring pore-creating aperture, it is specific as follows,
(1) drill bit that running check and replacement are worn in drilling；
(2) using old drill bit drilling when, its diameter is measured, it is ensured that the diameter of each more bit change is same or similar；
(3) it close to when whole hole section drilling, checks and replaces diameter drill bit drilling construction slightly bigger than normal and more intact.
8. a kind of Mined-out Area control injected hole pore-creating technique according to claim 1, it is characterised in that: the S4 of step 1
In, it further include the quality control method for ensuring whole hole hole depth, it is specific as follows,
(1) using steel wire as lining rope, plummet is fixed in one end, and the other end is connect with elevator, and every 5 meters are fixed a copper hoop and printed
Upper font size, while being checked using the qualified steel tape of inspection；
(2) it is measured simultaneously using two methods when measuring hole depth, i.e., remaining ruler on first measuring machine measures drilling rod and brill after trip-out
Have overall length, calculate whole hole hole depth, while to be measured again with plummet situations such as preventing in hole chip off-falling or collapse hole.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237010A (en) * | 2020-01-20 | 2020-06-05 | 中煤科工集团西安研究院有限公司 | Coal mine curtain grouting method |
| CN111411909A (en) * | 2020-04-23 | 2020-07-14 | 山东省煤田地质局第一勘探队 | Artificial wall building method for treating drilling engineering in coal mining subsidence area |
| CN111997685A (en) * | 2020-09-03 | 2020-11-27 | 中铁八局集团第三工程有限公司 | Construction method for highway to penetrate through coal seam goaf section |
| CN113530441A (en) * | 2021-07-16 | 2021-10-22 | 国家电网有限公司 | Control method for dam body drain hole precision |
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| CN113530441A (en) * | 2021-07-16 | 2021-10-22 | 国家电网有限公司 | Control method for dam body drain hole precision |
| CN113530441B (en) * | 2021-07-16 | 2022-08-23 | 国家电网有限公司 | Control method for dam body drain hole precision |
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