CN110424948A - Evaluation method suitable for the detection of coal mine gas extraction borehole sealing quality - Google Patents
Evaluation method suitable for the detection of coal mine gas extraction borehole sealing quality Download PDFInfo
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- CN110424948A CN110424948A CN201910705259.9A CN201910705259A CN110424948A CN 110424948 A CN110424948 A CN 110424948A CN 201910705259 A CN201910705259 A CN 201910705259A CN 110424948 A CN110424948 A CN 110424948A
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- 238000007789 sealing Methods 0.000 title claims abstract description 67
- 238000000605 extraction Methods 0.000 title claims abstract description 51
- 238000011156 evaluation Methods 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 86
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000013441 quality evaluation Methods 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- E21B47/005—Monitoring or checking of cementation quality or level
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Quality & Reliability (AREA)
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- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention discloses a kind of evaluation methods suitable for the detection of coal mine gas extraction borehole sealing quality, are related to mining industry quality evaluation field, include the following steps: that S1 determines the grade scale of different type drilling assessment item；S2 calculates different evaluation project to sealing quality weighing factor；S3 evaluates drilling and sealing quality to be evaluated according to actual measurement situation；S4 carries out classification processing to drilling according to evaluation result.To targetedly improve drilling utilization efficiency, improve that index is scientific, comprehensive and operability.
Description
Technical field
The present invention relates to a kind of evaluation methods suitable for the detection of coal mine gas extraction borehole sealing quality, mainly relate to
And mining industry quality evaluation field.
Background technique
In control of coalmine gas field, coal is widely used in for the extraction measure of representative with layer-through drilling and concordant drilling
Under mine, these drillings directly influence the peace of gas control efficiency and extraction system as the source that coal mine gas is administered
Entirely.Coal mine down-hole drilling is often arranged in coal seam or rock stratum, and for length from tens meters to upper km, drilling construction cost is huge,
Such as lead to drilling short term failure after sealing of hole because sealing quality is bad, not only waste drilling construction cost, it is often more important that influences
Gas control efficiency, influence coal mine is taken out to dig to adopt and be taken over indirectly.Mine mostly uses single hole extraction concentration as evaluation sealing of hole matter at present
The sole criterion of amount, major technique disadvantage include: first is that divided rank is single, not clear enough, generally according only to a certain concentration value
It is good or bad to be divided into extracting result；Second is that extraction concentration is only the one of standard for reflecting sealing quality, it is practical to bore
When hole is increased income in extraction (high-order hole) or gas permeability of coal seam is poor, desorption effect is undesirable, single hole extraction concentration is often not satisfactory.Due to
The difference (having layer-through drilling to drill with concordant) for the type that drills is different with extraction source (coal seam characteristic and gas enrichment are variant),
Extraction concentration can not really reflect drilling and sealing quality as evaluation index, need a kind of index science, comprehensively, strong operability
Drilling and sealing quality evaluating method.
Summary of the invention
For the above the deficiencies in the prior art, the present invention proposes a kind of suitable for coal mine gas extraction borehole sealing of hole matter
The evaluation method of detection is measured, to targetedly improve drilling utilization efficiency, it is scientific, comprehensive and can operate to improve index
Property.
In order to achieve the above objectives, the technical scheme is that including the following steps: that S1 determines different type drilling evaluation
The grade scale of project；S2 calculates different evaluation project to sealing quality weighing factor；S3 is according to actual measurement situation to brill to be evaluated
Hole sealing quality is evaluated；S4 carries out classification processing to drilling according to evaluation result.
Preferably, step S1 determines underground coal mine difference using coal seam specificity analysis and a large amount of extraction data statistic analysis
The graded index of type drilling single hole assessment item, it is provided for each assessment item marking of the step S4 to drilling actual measurement to be evaluated
Reliable judging basis.
Preferably, the drilling of underground coal mine different type includes that layer-through drilling or concordant drill, different according to drilling kind,
Graded index is different, as the concentration graded index A of layer-through drilling is generally greater than the extraction scale B mono- of concordant drilling and concordant drilling
As be higher than layer-through drilling, its different corresponding index in exploiting field or working face according still further to arrangement drilling can also be more specific
It is some.
Preferably, the single hole assessment item includes: extraction concentration A, extraction scale B, attenuation coefficient C, abnormal phenomenon D,
A, B, C are weight graded index, and D is rejection index, and four projects can reflect drilling and sealing quality comprehensively, such as extraction concentration A master
Reflect drilling whether gas leakage or whether there is or not string hole, extraction scale B reflection drilling whether constructs in place, attenuation coefficient C reflection drilling
Sealing quality changes with time trend, and abnormal phenomenon D reflects the whether normal sealing of hole of drilling and sealing process.
Preferably, it is determined and is divided according to extraction concentration A, extraction scale B and attenuation coefficient C if sealing of hole process phenomenon without exception
Grade index vetos index if sealing of hole process has abnormal phenomenon, and sealing of hole process is the first step, directly vetos if any abnormal, such as just
Chang Ze scores to three assessment items of drilling to be evaluated according to evaluation index, this step is the leading step before marking evaluation
Suddenly.
Preferably, step S2 is commented using step analysis, expert opinion and experiential modification by deriving the single hole that S1 is proposed
Valence project obtains underground coal mine different type drilling evaluation calculation formula, this step master to the weighing factor of drilling and sealing quality
If determining that different drilling assessment items to the weight of drilling and sealing quality score, specifically drill for step S4 by all kinds of methods
It is given a mark according to assessment item to calculate sealing quality scoring and provide calculation formula.
Preferably, step S2 drilling evaluation calculation formula X=A* α+B* β+C* γ, α value 40-60%, β value 20-
40%, γ value 10-30%, and the sum of α, β and γ are 100%.
Preferably, step S3 is obtained to drilling to be evaluated by the single hole assessment item of actual measurement regular period according to step S1
To graded index determine score value, and then evaluate the sealing quality of the drilling, this step mainly describe to it is to be evaluated drill into
How the specific steps of row sealing quality evaluation marking, including index are surveyed, give a mark according to what.
Preferably, to drilling to be evaluated by the measured time 15 days, 30 days or 60 days, minute directly affects judge
Efficiency, time longer evaluation reliability is higher but workload increases, and is made by oneself by evaluation unit.
Preferably, step S4 chooses corresponding solution and arranges according to the drilling and sealing quality evaluation result that step S3 is determined
It applies, evaluation result is that effect is good or effect does not need preferably to handle, and evaluation result is that effective reinforcement is observed and according to subsequent
Observed result processing, evaluation result are that invalid drilling then needs sealing of hole again or adds work drilling processing.This step is to brill
The subsequent step of hole sealing quality evaluation can take different measure to drilling using unit according to different drilling evaluation results, weight
Point is that the drilling invalid to evaluation result is handled in time, it is ensured that the timely extraction of corresponding region coal gas avoids extraction dead space
It is up to standard that domain influences whole extraction.
It technical principle of the invention and has the beneficial effect that:
According to practical experience, single hole device in Gas extraction scale and attenuation coefficient are equally the important of reflection drilling and sealing quality
Comprehensive classification standard is introduced drilling and sealing quality standard by characterization parameter, therefore the grade scale thought based on statistical theory
Appraisal process, proposition form a kind of general drilling and sealing evaluating criterion of quality for being applicable in all types of drillings of underground coal mine, specifically
The criterion determined according to the present invention when mine application investigates weight and accurate evaluation can be realized in adjustment standards of grading, to be directed to
Property raising drill utilization efficiency.Index is more scientific, comprehensive, and simultaneously operable property is strong.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only it is of the invention wherein
Four width for those of ordinary skill in the art without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the drilling and sealing quality evaluation step of the embodiment of the present invention；
Fig. 2 is the specific implementation step of the determination different type drilling assessment item grade scale S1 of the embodiment of the present invention；
Fig. 3 is specific reality of the Calculation Estimation project to sealing quality weighing factor and derivation formula S2 of the embodiment of the present invention
Apply step；
Fig. 4 is the specific implementation that the progress sealing quality of the embodiment of the present invention is evaluated S3 and handled according to evaluation result
Step S4.
Specific embodiment
Below in conjunction with attached drawing, the technical solution in the present invention is clearly and completely described, it is clear that described
Embodiment is only presently preferred embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Embodiment
As shown in Figure 1, the present invention includes the following steps:
S1 determines the grade scale of different type drilling assessment item,
S2 calculates different evaluation project to sealing quality weighing factor；
S3 evaluates drilling and sealing quality to be evaluated according to actual measurement situation；
S4 carries out classification processing to drilling according to evaluation result.
As shown in Fig. 2, step S1 determines underground coal mine using coal seam specificity analysis and a large amount of extraction data statistic analysis
The classification of different type 4 single hole assessment items (extraction concentration A, extraction scale B, attenuation coefficient C, abnormal phenomenon D) of drilling refers to
Mark, the drilling of underground coal mine different type include that layer-through drilling or concordant drill.According to extraction if sealing of hole process phenomenon without exception
Concentration A, extraction scale B and attenuation coefficient C determine graded index, veto index if sealing of hole process has abnormal phenomenon.
As shown in figure 3, step S2, using step analysis, expert opinion and experiential modification, by 4 that derive S1 proposition
Single hole assessment item obtains underground coal mine different type drilling evaluation calculation formula: X=to the weighing factor of drilling and sealing quality
A* α+B* β+C* γ, α value 40-60%, β value 20-40%, γ value 10-30%, and the sum of α, β and γ are 100%.
As shown in figure 4, step S3,4 for passing through actual measurement regular period (15 days, 30 days or 60 days) to drilling to be evaluated
Single hole assessment item determines score value according to the graded index that step S1 is obtained, and then evaluates the sealing quality of the drilling.
Step S4 chooses corresponding solution, evaluation knot according to the drilling and sealing quality evaluation result that step S3 is determined
Fruit is that effect is good or effect does not need preferably to handle, evaluation result be it is effective reinforce observing and according to subsequent observed result at
Reason, evaluation result are that invalid drilling then needs sealing of hole again or adds work drilling processing.
Case history
Drilling and sealing evaluating criterion of quality is as follows to be determined according to mentioned above principle to certain energy investment group subordinate certain person coal mine:
The different evaluation project grading system table 1. layer-through drilling and concordant drill:
2. assessment item A, B, C are to sealing quality weighing factor:
Extraction concentration, extraction scale, the weight of three indexs of attenuation coefficient are respectively 50%, 30%, 20%, are thereby determined that
Comprehensive scores calculation formula: X=A*50%+B*30%+C*20%.
3. sealing quality scoring and corresponding grade as shown in the table below:
| Comprehensive scores | Grade |
| X≥80 | Effect is good |
| 60≤X < 80 | Effect is preferable |
| 40≤X < 60 | Effectively |
| X < 40 | In vain |
Technical characterstic
This technology core is to propose a kind of drilling and sealing quality evaluation system of multi objective, the listed power of above-mentioned case history
Weight and assessment item grade scale are evaluated Departmental organization by it and are modified in specific mine application, and do with EXCELL etc.
Public software application can greatly improve evaluation efficiency, reduce artificial error of quality appraisement, while can establish phase according to these standards using mine
The extraction management system and check standard system answered are used cooperatively.
The invention of this method is for reversing the current coal mine gas drainage field in China extensive metering judge and management mode
Act on it is huge, especially cooperation intelligent online measuring software can realize coal mine drilling accurate dynamic realtime regulation, using this hair
It is bright to carry out application in certain person coal mine of certain energy investment Group Co., Ltd subordinate and certain second coal mine, add up evaluation drilling
1100, after carrying out sealing pores again to wherein 168 failure drillings, average extraction concentration promotes 24%, average single hole
Extraction scale reaches 0.018m3/ min, and keep 60 days extraction altitude decay amplitudes less than 10%, sufficiently show present invention side
The practical value of method.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of evaluation method suitable for the detection of coal mine gas extraction borehole sealing quality, which is characterized in that including such as
Lower step:
S1 determines the grade scale of different type drilling assessment item；
S2 calculates different evaluation project to sealing quality weighing factor；
S3 evaluates drilling and sealing quality to be evaluated according to actual measurement situation；
S4 carries out classification processing to drilling according to evaluation result.
2. the evaluation method according to claim 1 suitable for the detection of coal mine gas extraction borehole sealing quality,
Be characterized in that: step S1 determines that underground coal mine different type is bored using coal seam specificity analysis and a large amount of extraction data statistic analysis
The graded index of hole single hole assessment item.
3. the evaluation method according to claim 2 suitable for the detection of coal mine gas extraction borehole sealing quality,
It is characterized in that, the drilling of underground coal mine different type includes that layer-through drilling or concordant drill.
4. the evaluation method according to claim 2 suitable for the detection of coal mine gas extraction borehole sealing quality,
Be characterized in that: the single hole assessment item includes: extraction concentration A, extraction scale B, attenuation coefficient C, abnormal phenomenon D.
5. the evaluation method according to claim 4 suitable for the detection of coal mine gas extraction borehole sealing quality,
It is characterized in that: determining that classification refers to according to extraction concentration A, extraction scale B and attenuation coefficient C if sealing of hole process phenomenon without exception
Mark, vetos index if sealing of hole process has abnormal phenomenon.
6. the evaluation method according to claim 2 suitable for the detection of coal mine gas extraction borehole sealing quality,
It is characterized in that: step S2, using step analysis, expert opinion and experiential modification, by the single hole assessment item for deriving S1 proposition
To the weighing factor of drilling and sealing quality, underground coal mine different type drilling evaluation calculation formula is obtained.
7. the evaluation method according to claim 6 suitable for the detection of coal mine gas extraction borehole sealing quality,
Be characterized in that: calculation formula X=A* α+B* β+C* γ, α value 40-60%, β value 20-40% is evaluated in step S2 drilling, and γ takes
Value 10-30%, and the sum of α, β and γ are 100%.
8. the evaluation method according to claim 6 suitable for the detection of coal mine gas extraction borehole sealing quality,
It is characterized in that: step S3, to drilling to be evaluated by the single hole assessment item of actual measurement regular period, point obtained according to step S1
Grade index determines score value, and then evaluates the sealing quality of the drilling.
9. the evaluation method according to claim 8 suitable for the detection of coal mine gas extraction borehole sealing quality,
It is characterized in that: to drilling to be evaluated by the measured time 15 days, 30 days or 60 days.
10. the evaluation method according to claim 8 suitable for the detection of coal mine gas extraction borehole sealing quality,
Be characterized in that: step S4 chooses corresponding solution according to the drilling and sealing quality evaluation result that step S3 is determined, evaluates
It as a result is that effect is good or effect does not need preferably to handle, evaluation result is that effective reinforcement is observed and according to subsequent observed result
Processing, evaluation result are that invalid drilling then needs sealing of hole again or adds work drilling processing.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577232A (en) * | 2020-05-21 | 2020-08-25 | 重庆市能源投资集团科技有限责任公司 | Coal mine underground fracturing control safety guarantee method |
| CN111861189A (en) * | 2020-07-16 | 2020-10-30 | 西山煤电(集团)有限责任公司 | Ground L-shaped drilling gas extraction engineering evaluation method on mining-induced fracture zone |
| CN112161587A (en) * | 2020-09-27 | 2021-01-01 | 西北工业大学 | Robot intelligent drilling and riveting operation online quality detection system and method |
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| CN111861189A (en) * | 2020-07-16 | 2020-10-30 | 西山煤电(集团)有限责任公司 | Ground L-shaped drilling gas extraction engineering evaluation method on mining-induced fracture zone |
| CN112161587A (en) * | 2020-09-27 | 2021-01-01 | 西北工业大学 | Robot intelligent drilling and riveting operation online quality detection system and method |
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