CN106596174B - The closely horizontal long range coal sample pressure maintaining fixed point of underground coal mine is closed to take method - Google Patents
The closely horizontal long range coal sample pressure maintaining fixed point of underground coal mine is closed to take method Download PDFInfo
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- CN106596174B CN106596174B CN201611155209.0A CN201611155209A CN106596174B CN 106596174 B CN106596174 B CN 106596174B CN 201611155209 A CN201611155209 A CN 201611155209A CN 106596174 B CN106596174 B CN 106596174B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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Abstract
A kind of closely horizontal long range coal sample pressure maintaining fixed point of underground coal mine is closed to take method, and this method detects directional hole first with this nearly horizontal coal seam and finds out fluctuations rule in coal seam in sampling region, completes sample point and sampling directional hole design；Then segmentation, which is oriented drilling, ensures that directional hole is crept into along planned course to sample point, and recycling pressure maintaining enclosed sampling drilling tool is sampled drilling and coal sample pressure maintaining is taken, and takes until completing all sample point coal samples.This method takes full advantage of directional hole drilling track real-tune TT & C and over long distances drilling advantage and pressure maintaining closed sampling device pressure-resistant seal characteristic, both improved the closely horizontal coal sample in underground takes depth, sampling precision is accurately controlled again, realize the multiple spot sampling of single hole, it is closed more pressure maintaining to be carried out to the coal sample taken, avoid methane gas loss, it is ensured that the accuracy of coal-bed gas parameter testing provides accurate reference frame with assessment for mine construction design.
Description
Technical field
The present invention relates to the technical fields more particularly to a kind of nearly water of underground coal mine of safety of coal mines and coal field geology and exploration
Flat long range coal sample pressure maintaining fixed point is closed to take method.
Background technique
High methane, Gas Outburst mine coal production account for coal in China yield 30%, coal and gas prominent accident Shi Youfa
It is raw, very big threat is caused to mine safety production.Before carrying out methane drainage and utilization project to gas by engineering construction, need to take coal sample
Gas bearing capacity test is carried out, provides guidance for the rational design of gas drainage engineering；Meanwhile after gas drainage is administered, also need
Gas residual content test is carried out, to examine whether gas pumping effect meets related specification requirement.
Underground coal mine coal sample, which takes method mainly, at present has drilling cuttings sampling method, casing core sample method, wire line coring method, pressure wind to take
Core method and sealed coring method etc., have the following problems in operation and insufficient: 1. depth selection is shallower, and most deep is only 80m, can not
Meet advanced region Gas explosion burns measurement and evaluation needs；2. sampling precision is low, the tool of practical sample point is unable to control and measured
Body spatial position and and design sample point deviation；3. gas quick release in sampling process, sampling result distortion is obvious；4. one
A drilling can be only done a sample point sampling, and project amount is big and wastes.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, researching and designing go out a kind of closely horizontal long range coal sample pressure maintaining of underground coal mine and pinpoint the closed side of taking
Method, to overcome drawbacks described above.
Summary of the invention
The purpose of the present invention is to provide a kind of underground coal mine, closely horizontal long range coal sample pressure maintaining fixed point is closed takes method,
It can solve in the prior art the defects of depth selection is shallow, precision is low, result is easily distorted, the sampling of single hole single.
To solve the above problems, the invention discloses a kind of closely horizontal long range coal sample pressure maintainings of underground coal mine to pinpoint closed adopt
Take method, comprising the following steps:
Step 1: the track setting for sampling directional hole determines required sampling directional hole by detecting for sampling region,
The sampling directional hole rises and falls along coal seam to be extended, in close horizontally disposed, the sampling directional hole by casing hole section, orient hole section and
Hole section composition is sampled, described sleeve pipe hole section orients hole section behind aperture, described sleeve pipe hole section and sampling hole section successively replaces
Setting, described sleeve pipe hole section depth >=9m, and hole section diameter >=120mm is oriented, sampling hole segment length is 1.2~1.5m；
Step 2: sampling the casing hole section construction of directional hole, and using revolution counter-boring techniques construction step by step, and tripping in casing seals
Opening arrangement is connected behind hole；
Step 3: the orientation hole section construction of directional hole is sampled, drilling drilling trajectory and the control of planned course deviation are in 0.5m
Within, slush pump is opened after drilling to design sample point and uses big pump amount punching half an hour, and quickly proposes drilling tool in hole；
Step 4: the sampling hole section construction of directional hole is sampled, and carries out that coal sample pressure maintaining is closed to be taken；
Step 5: air tightness test samples successfully if detection is qualified, if detection is unqualified, repeats step 4 and takes again
Sample；
Step 6: the multiple pressure maintaining of single hole pinpoints enclosed sampling, repeats step 3 to step 5, to the coal sample of multiple sample points
Carry out that pressure maintaining is closed takes.
Wherein: also include following sub-step in step 1:
Step 1.1: the design of sample point parameter plane designs or is assessed according to mine construction needs, determines sample point plane
Coordinate parameters；
Step 1.2: detecting directional hole construction, directional hole is detected in construction in sampling region, finds out coal seam in sampling region
Fluctuations rule；
Step 1.3: the design of sample point parameter profile, according to detecting, the coal seam fluctuations that directional hole is found out are regular, determine
Sample point section coordinate parameters；
Step 1.4: sampling directional hole design, according to detecting coal seam fluctuations rule that directional hole is found out and sample point is flat
Face and sectional parameter, design sample directional hole track, it is ensured that sampling directional hole extends in coal seam, and successively by multiple sample points
It connects.
Wherein: also include following sub-step in step 4:
Step 4.1: will test qualified pressure maintaining enclosed sampling drilling tool decentralization, until opening slush pump after bottom hole and passing through sampling
Drilling rod supplies water to drilling and extremely returns out from aperture, it is ensured that without residue in coal sample cylinder；
Step 4.2: sampling hole section drilling, mud pumpage≤100L/min when drilling, drilling tool rotational speed is 50~
80r/min, rate of penetration are 0.2~0.3m/min；
Step 4.3: coal sample is closed, mud pumpage >=200L/min in closed process；
Step 4.4: coal sample is taken out.
Wherein: orienting the dip angle of hole and azimuth build angle rate≤0.3 °/m of hole section, rise and fall and extend along coal seam.
Wherein: the pressure maintaining enclosed sampling drilling tool is by ring bit, pressure maintaining closed sampling device, change silk catcher, auger
Bar and rotation water feeder are sequentially connected composition；Wherein ring bit internal diameter≤35mm, outer diameter≤108mm；Pressure maintaining enclosed sampling dress
It is provided with sampler barrel in setting, sampler barrel internal diameter is 3~5mm bigger than ring bit internal diameter, become silk catcher and sampling drilling rod inner hollow,
Internal diameter >=20mm.
By above structure it is found that the closely horizontal long range coal sample pressure maintaining fixed point of underground coal mine of the invention is closed to take method
It has the effect that
1, improve underground coal mine coal sample takes depth, can reach 600m or more, meets advanced region Gas explosion burns and surveys
Fixed and evaluation needs；
2, by directional hole with brill real-time track observing and controlling, it is ensured that deviation≤0.5m of practical sample point and design sample point,
Sampling precision is high, it is ensured that the authenticity of testing result；
3, it is closed that coal sample pressure maintaining can be carried out when sampling, reduces gas release, it is ensured that the accuracy of testing result is mine
Engineering design and assessment provide accurate reference frame；
4, the achievable multiple spot that drills repeatedly samples, and reduces project amount, saves sampling cost.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows that the closely horizontal long range coal sample pressure maintaining of underground coal mine of the invention pinpoints the closed signal for taking method
Figure.
Fig. 2 shows sampling directional hole schematic diagram of the invention；
Fig. 3 shows the schematic diagram of gastight sampling drilling tool of the present invention.
Appended drawing reference:
Casing hole section 1, sampling hole section 3, ring bit 4, pressure maintaining closed sampling device 5, coal sample cylinder 6, becomes orientation hole section 2
Silk catcher 7, sampling drilling rod 8, rotation water feeder 9.
Specific embodiment
Referring to Fig. 1 to Fig. 3, it is shown that the closely horizontal long range coal sample pressure maintaining of underground coal mine of the invention pinpoints the closed side of taking
Method.
As shown in Figure 1, the underground coal mine closely horizontal long range coal sample pressure maintaining fixed point is closed, to take method may include following
Step:
Step 1: the track setting for sampling directional hole determines required sampling directional hole by detecting for sampling region,
Wherein as shown in Fig. 2, the sampling directional hole rises and falls along coal seam extends, in close horizontally disposed, branched hole is preferably avoided, it is described
Sampling directional hole can be made of casing hole section 1, orientation hole section 2 and sampling hole section 3, wherein described sleeve pipe hole section 1 is attached close to aperture
Closely, it is orientation hole section 2 after described sleeve pipe hole section 1, is sampling hole section 3 after the orientation hole section 2, it is subsequent to orient hole section 2 and take
Sample hole section 3 is successively arranged alternately, wherein in specific setting, 1 depth of described sleeve pipe hole section >=9m, and orient 2 diameter of hole section >=
120mm, sampling 3 length of hole section is 1.2~1.5m, and orients the dip angle of hole of hole section 2 and azimuth build angle rate answers≤0.3 °/m,
It is arranged by those specific values, is not only able to achieve the extension that preferably rises and falls along coal seam, moreover it is possible to ensures the reasonability and standard sampled
True property.
Also include following sub-step in the step 1:
Step 1.1: the design of sample point parameter plane designs or is assessed according to mine construction needs, determines sample point plane
Coordinate parameters (i.e. eastern coordinate, northern coordinate).
Step 1.2: directional hole construction is detected, directional hole is detected in construction in sampling region, in drilling process, every 60~
Coal seam and top plate boundary line are detected to branched hole in 100m construction, until reaching projected depth；By the coal seam detected every time with
Top plate point of interface is sequentially connected using broken line, can be obtained coal seam and top plate boundary line, and the angle value of every section of broken line is not same district
Domain seam inclination, to find out fluctuations rule in coal seam in sampling region.
Step 1.3: the design of sample point parameter profile, according to detecting, the coal seam fluctuations that directional hole is found out are regular, determine
Sample point section coordinate parameters, i.e. elevation.
Step 1.4: sampling directional hole design, according to detecting coal seam fluctuations rule that directional hole is found out and sample point is flat
Face and sectional parameter, design sample directional hole track, it is ensured that sampling directional hole extends in coal seam, and successively by multiple sample points
It connects.
Step 2: the casing hole section 1 for sampling directional hole is constructed, and described sleeve pipe hole section 1 can be used turns round counter-boring techniques step by step
Construction, and opening arrangement is connected after tripping in casing sealing of hole, internal diameter >=135mm of described sleeve pipe.
Step 3: the orientation hole section 2 for sampling directional hole is constructed, the tripping in measurement while drilling directional tool into drilling, using multiple
It closes Technology of Directional Drilling to construct, in work progress, primary drilling drilling trajectory is measured every 3m using mining measurement while drilling device,
When drilling trajectory and planned course deviation are greater than permissible value, well straightening drilling is carried out, thus will drilling drilling trajectory and design rail
Mark deviation controls within 0.5m, and slush pump is opened after drilling to design sample point and uses big pump amount punching half an hour, then fastly
Speed mentions brill and exits measurement while drilling directional tool.
Step 4: sampling the sampling hole section construction of directional hole, and it is closed to carry out coal sample pressure maintaining by pressure maintaining enclosed sampling drilling tool
It takes, it may include below step by step:
Step 4.1: the decentralization of pressure maintaining enclosed sampling drilling tool can detect 6 pressure maintaining airtight performance of coal sample cylinder, after qualified that pressure maintaining is close
Close Sampling driller tripping in drilling；In decentralization process, if resistance is larger, Ying Kaiqi slush pump carries out revolution cleaning bottom of hole, until drilling tool arrives
Up to bottom hole；Open slush pump and supplied water to drilling to returning out from aperture by sampling drilling rod 8, it is ensured that in coal sample cylinder 6 without cinder after, remember
Record lower punching pump pressure.
Step 4.2: sampling hole section 3 is crept into.The ring bit 4 of pressure maintaining enclosed sampling drilling tool is pushed into the bottom hole that reclines, and
Mud pumpage is adjusted and reduced to≤100L/min, starts drilling machine with the speed rotary drilling bits of 50~80r/min, with 0.2~0.3m/
The speed of min is crept into forward, after drilling depth reaches 1.2~1.5m, is stopped drilling, is closed slush pump.
Step 4.3: coal sample closing.Removal rotates water feeder 9, is put into a ball into sampling 8 inner annular space of drilling rod,
The rubber bulb diameter is greater than 16mm, and is less than 24mm and samples the minimum value of 8 internal diameter of drilling rod, then loads onto rotation water feeder
9, and open slush pump, mud pumpage is adjusted to >=200L/min to sampling drilling rod 8 and is supplied water, ball is pushed to transport to bottom hole
It is dynamic；When ball enters pressure maintaining closed sampling device 5 and clogging water stream channel, slush pump pump pressure increases by 2~4MPa suddenly,
Coal sample is cut and is sealed in coal sample cylinder 6.Record pressure maintaining enclosed sampling drilling tool decentralization time, sampling hole section 3 are crept into detail
Time and coal sample off-period.
Step 4.4: coal sample is taken out.Slush pump is closed, brill is quickly mentioned, exits pressure maintaining enclosed sampling drilling tool, it is close to remove pressure maintaining
After closing sampler 5, coal sample cylinder 6 is taken out.
Step 5: air tightness test carries out air tightness test to the coal sample cylinder 6 of taking-up, if detection is qualified, samples successfully；
If detection is unqualified, step 4 sub-sampling again is repeated.
Step 6: single hole repeatedly pinpoints enclosed sampling.Step 3 is repeated to step 5, the coal sample of multiple sample points is carried out
Pressure maintaining is closed to be taken.
Slush pump rated pump pressure >=the 10MPa, pump amount are adjustable.
Referring to Fig. 3, pressure maintaining enclosed sampling drilling tool is by ring bit 4, pressure maintaining closed sampling device 5, change silk catcher 7, sampling
Drilling rod 8 and rotation water feeder 9 are sequentially connected composition；Wherein 4 internal diameters of ring bit≤35mm, outer diameter≤108mm；Pressure maintaining is closed to be taken
Sampler barrel 6 is provided in sampling device 5,6 internal diameter of sampler barrel is 3~5mm bigger than 4 internal diameter of ring bit, has pressure maintaining sealing function, takes
Sampler barrel does not turn round when sample is crept into；Become silk catcher 7 and sampling 8 inner hollow of drilling rod, internal diameter >=20mm.
It can be seen from the above content that the closely horizontal long range coal sample of underground coal mine of the invention pinpoints, pressure maintaining is closed to take method
Directional hole is detected first with this nearly horizontal coal seam and finds out fluctuations rule in coal seam in sampling region, completes sample point and sampling is fixed
It is designed to hole；Then segmentation, which is oriented drilling, ensures that directional hole is crept into along planned course to sample point, recycles pressure maintaining closed
Sampling driller is sampled drilling and coal sample pressure maintaining is taken, and takes until completing all sample point coal samples.This method makes full use of
Directional hole drilling track real-tune TT & C and over long distances drilling advantage and pressure maintaining closed sampling device pressure-resistant seal characteristic, were both improved
Underground closely horizontal coal sample takes depth, and accurately controls sampling precision, realizes the multiple spot sampling of single hole, more can be to adopting
The coal sample progress pressure maintaining taken is closed, avoids methane gas loss, it is ensured that the accuracy of coal-bed gas parameter testing is mine construction
Design provides accurate reference frame with assessment.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.
Claims (4)
1. a kind of closely horizontal long range coal sample pressure maintaining fixed point of underground coal mine is closed to take method, comprising the following steps:
Step 1: the track setting for sampling directional hole determines required sampling directional hole by detecting for sampling region, described to take
Sample directional hole rises and falls along coal seam to be extended, in close horizontally disposed, the sampling directional hole by casing hole section, orient hole section and sampling hole
Duan Zucheng, hole section is oriented behind aperture, described sleeve pipe hole section for described sleeve pipe hole section and sampling hole section is successively arranged alternately, institute
Casing hole section depth >=9m is stated, and orients hole section diameter >=120mm, sampling hole segment length is 1.2~1.5m, and it includes following sons
Step:
Step 1.1: the design of sample point parameter plane designs or is assessed according to mine construction needs, determines sample point plane coordinates
Parameter；
Step 1.2: detecting directional hole construction, directional hole is detected in construction in sampling region, finds out that coal seam rises and falls in sampling region
Changing rule；
Step 1.3: the design of sample point parameter profile, according to detecting, the coal seam fluctuations that directional hole is found out are regular, determine sampling
Point section coordinate parameters；
Step 1.4: sampling directional hole design, according to detect coal seam fluctuations rule that directional hole is found out and sample point plane and
Sectional parameter, design sample directional hole track, it is ensured that sampling directional hole extends in coal seam, and successively connects multiple sample points
Get up；
Step 2: the casing hole section construction of directional hole is sampled, using revolution counter-boring techniques construction step by step, and after tripping in casing sealing of hole
Connect opening arrangement；
Step 3: the orientation hole section construction of directional hole is sampled, drilling drilling trajectory and planned course deviation control within 0.5m,
Slush pump is opened after drilling to design sample point and uses big pump amount punching half an hour, and quickly proposes drilling tool in hole；
Step 4: sampling the sampling hole section construction of directional hole, and carry out that coal sample pressure maintaining is closed to be taken；
Step 5: air tightness test samples successfully if detection is qualified, if detection is unqualified, repeats step 4 sub-sampling again；
Step 6: the multiple pressure maintaining of single hole pinpoints enclosed sampling, repeats step 3 to step 5, carries out to the coal sample of multiple sample points
Pressure maintaining is closed to be taken.
2. pressure maintaining fixed point as described in claim 1 is closed to take method, it is characterised in that: in step 4 also comprising following son
Step:
Step 4.1: pressure maintaining enclosed sampling drilling tool being transferred, until opening slush pump after bottom hole and being supplied water by sampling drilling rod to drilling
It is extremely returned out from aperture, it is ensured that without residue in coal sample cylinder；
Step 4.2: sampling hole section drilling, mud pumpage≤100L/min when drilling, drilling tool rotational speed are 50~80r/
Min, rate of penetration are 0.2~0.3m/min；
Step 4.3: coal sample is closed, mud pumpage >=200L/min in closed process；
Step 4.4: coal sample is taken out.
3. pressure maintaining fixed point as described in claim 1 is closed to take method, it is characterised in that: orient dip angle of hole and the side of hole section
Parallactic angle build angle rate≤0.3 °/m rises and falls along coal seam and extends.
4. pressure maintaining as described in claim 1 fixed point is closed to take method, it is characterised in that: the pressure maintaining enclosed sampling drilling tool by
Ring bit, pressure maintaining closed sampling device, change silk catcher, sampling drilling rod and rotation water feeder are sequentially connected composition；It is wherein cyclic annular
Drill bit internal diameter≤35mm, outer diameter≤108mm；Sampler barrel is provided in pressure maintaining closed sampling device, sampler barrel internal diameter is bored than cyclic annular
The head big 3~5mm of internal diameter becomes silk catcher and sampling drilling rod inner hollow, internal diameter >=20mm.
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| CN111322009B (en) * | 2020-03-16 | 2021-04-23 | 陇东学院 | Downhole anti-orifice pressure-maintaining drilling method |
| CN112362371A (en) * | 2020-10-30 | 2021-02-12 | 山西晋煤集团技术研究院有限责任公司 | Method for verifying reliability of gas content determination by long-distance closed coring process |
| CN114441216A (en) * | 2021-12-22 | 2022-05-06 | 中煤科工集团西安研究院有限公司 | Dry-type closed sampling method for underground deep hole of coal mine |
| CN114659828B (en) * | 2022-03-18 | 2022-12-20 | 河南理工大学 | Fixed point pressure maintaining sampling device for coal mine underground coal seam gas content determination |
| CN114739726A (en) * | 2022-04-21 | 2022-07-12 | 淮南矿业(集团)有限责任公司 | Method and system for measuring coal seam remote gas content |
| CN114878226A (en) * | 2022-06-24 | 2022-08-09 | 郑州慧矿智能科技有限公司 | Coal seam drilling pressure maintaining and sampling device |
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