CN105545299A - Method for radon gas release concentration in-situ determination in underground different position coal rock beds - Google Patents
Method for radon gas release concentration in-situ determination in underground different position coal rock beds Download PDFInfo
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- CN105545299A CN105545299A CN201510893267.2A CN201510893267A CN105545299A CN 105545299 A CN105545299 A CN 105545299A CN 201510893267 A CN201510893267 A CN 201510893267A CN 105545299 A CN105545299 A CN 105545299A
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- radon
- coal rock
- radon gas
- rock layer
- determination
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/081—Obtaining fluid samples or testing fluids, in boreholes or wells with down-hole means for trapping a fluid sample
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/0875—Well testing, e.g. testing for reservoir productivity or formation parameters determining specific fluid parameters
Abstract
Provided is a method for radon gas release concentration in-situ determination in underground different position coal rock beds. The method comprises steps: determining underground different position coal rock beds for radon gas release concentration determination, and respectively numbering as L1 to Ln; automatically calibrating a determination coefficient of a continuous radon measurement instrument (7); fixedly arranging a cylindrical hollow rubber piston (3) on the end of a plastic flexible pipe (4), putting the cylindrical hollow rubber piston in an exploration drilling hole (2); when measuring the radon gas release concentration in the L1, recording data after measurement of each hour, continuously measuring for 3 hours, to record obtained three pieces of data respectively as C11, C12, and C13, taking the average value of the C11, C12, and C13 as the radon gas release concentration in the L1, recording as C1; measuring the L2, L3, and the like, Ln in sequence, and respectively recording the final measuring result as C2, C3, and the like, Cn. Using the method, radon gas release concentration determination of all position coal rock beds can be completed in the existing exploration drilling hole, interference on measuring results by size effect and external environment factors is eliminated, and field in-situ determination is actually realized.
Description
Technical field
The invention belongs to coal underground mining technologies field, to be specifically related in the coal rock layer of different layers position, a kind of underground radon gas and to separate out concentration in-situ determination method, be mainly applicable to the dark coal rock layer of China's western shallow-reserved and thickness in monolayer is greater than in different layers position, the underground coal rock layer of 0.5m.
Background technology
Radon gas is a kind of natural radioactive rare gas of colorless and odorless, is difficult to be therefore easily perceived by humans, and the long-term radon gas that sucks can bring injury to the health of people, and people are accustomed to claiming radon gas for " stealthy killer ".Radon is distributed widely in the earth's crust, and its activity is very strong, has good transfer ability under field conditions (factors), and it divided by outside gaseous form migration, can also descend water and soil water to move concomitantly with solubilised state in geological environment; Radon gas can migrate to earth's surface in the scope of down-hole at least about 400m from the coal rock layer of underground.Radon gas, upwards in transition process, can enter into mining face under mine and lane space, forms the radon gas of higher concentration.Underground coal mine radon concentration is about 10 times in ground environment, and down-hole Radon and its descendants exceedes several times even tens times of state health standards.Therefore, carry out Measurement accuracy to radon concentration in the coal rock layer of different layers position and seem particularly important, this is the important leverage ensureing underground labour's life and health safety.In addition, research both at home and abroad shows, all there will be Radon Anomaly phenomenon when the geological disaster such as earthquake, volcano occurs, and therefore, can be carried out the geological disaster detections such as earthquake by Radon monitor.Radon gas Detection Techniques as a kind of rising geophysical exploration method, to some degree for the prediction of the detection of mining overburden crack, the detection of colliery hidden geological tectonic, the detection of spontaneous combustion of coal seam primer sector and the coal rock dynamic disaster such as coal and gas prominent provides a kind of detection means having prospect.
Because radon has radioactivity, even if concentration is very little, also can be measured; It has again the physical chemistry of the earth character of inert gas simultaneously, namely can transmit and gather in microfissure or micropore, and this just provides foundation for carrying out radon gas detection on earth's surface.People, once by setting up Radon migration mathematical model, are deduced the Mathematical express formula separating out concentration along radon gas in the coal rock layer of different layers position, subterranean depth direction.In order to verify further and improve theory deduction result, just must separate out concentration to radon gas in the coal rock layer of different layers position, underground and measure.At present, separating out concentration determination mainly by choosing coal petrography sample at the scene for radon gas in the coal rock layer of different layers position, underground, then delivering to laboratory and measuring.Due to the impact of dimensional effect and outside environmental elements, thus cause final measurement and on-site actual situations difference comparatively large, more cannot to verify theory deduction result and perfect.
Summary of the invention
Radon gas in the coal rock layer of different layers position, a kind of underground is the object of the present invention is to provide to separate out concentration in-situ determination method, the method only need can complete radon gas in the coal rock layer of all layer positions and separate out the measurement of concentration in existing exploratory bore-hole, and dimensional effect and outside environmental elements can be eliminated to the interference of measurement result, can really realize on-the-spot in-site detecting.
For achieving the above object, the invention provides radon gas in the coal rock layer of different layers position, a kind of underground and separate out concentration in-situ determination method, step is as follows:
A. according to existing exploratory bore-hole position, work plane earth's surface, and in conjunction with work plane log sheet information, carry out different layers position, the underground coal rock layer that radon gas separates out concentration determination needed for determining, and be numbered L respectively from top to bottom
1~ L
n;
B. after opening Continuous Instrument for Radon work 1h, according to on-the-spot air pressure and humiture situation, the coefficient of determination of automatic calibration Continuous Instrument for Radon, to obtain measurement result accurately, has calibrated rear closedown Continuous Instrument for Radon;
C. cylinder type hollow rubber piston is fixedly set in by the centre bore on its upper surface on the termination of being with graduated plastic flexible pipe, and having the plastic flexible pipe termination of cylinder type hollow rubber piston to put into exploratory bore-hole in cover, the other end of described plastic flexible pipe is connected with micro-suction pump; Described cylinder type hollow rubber piston sidewall mid point is arranged with four small air inlet holes, and external diameter and the exploratory bore-hole aperture of cylinder type hollow rubber piston match, and the aperture of described centre bore and the external diameter of plastic flexible pipe match; Described micro-suction pump is connected with Continuous Instrument for Radon by rubber hose;
D. L is measured
1when radon gas in coal rock layer separates out concentration, by the soffit of rubber piston and L
1the lower boundary alignment of coal rock layer, after first opening micro-suction pump work 1h, and then opens Continuous Instrument for Radon and starts to measure, often measure 1h and record a determination data, altogether continuous measurement 3h, and three determination datas obtained are recorded as C respectively
11, C
12and C
13, get the average of three as L
1radon gas in coal rock layer separates out concentration, is designated as C
1;
E. according to steps d, L is measured successively
2, L
3l
n, and respectively final measurement is designated as C
2, C
3c
n, terminate until measure.
Preferably, the height of described cylinder type hollow rubber piston is 5 ~ 10cm, and described small air inlet hole aperture is 5mm.
Preferably, the aperture of described plastic flexible pipe is 10mm, and the aperture of described rubber hose is 5mm.
Preferably, the model of described Continuous Instrument for Radon is KJD-2000R.
Preferably, the working flow of described micro-suction pump is 1L/min.
Compared with prior art, the present invention is without the need to playing gun drilling from work plane earth's surface to underground again, only need can complete radon gas in the coal rock layer of all layer positions and separate out the measurement of concentration in existing exploratory bore-hole, and eliminate dimensional effect and outside environmental elements to the interference of measurement result, really achieve on-the-spot in-site detecting.The method can realize radon gas in the coal rock layer of all layer positions by cylinder type hollow rubber piston, micro-suction pump, Continuous Instrument for Radon and flexible pipe and separate out the measurement of concentration, whole process installing engineering amount is little, survey data obtains easily, and not by the restriction of the concrete mining conditions of underground coal mine, workable, cost is low, and efficiency is high, has practicality and generalization widely.
Accompanying drawing explanation
Fig. 1 is on-the-spot in-site detecting operating diagram of the present invention;
Fig. 2 is the structural representation of cylinder type hollow rubber piston in the present invention;
In figure: 1, work plane earth's surface, 2, exploratory bore-hole, 3, cylinder type hollow rubber piston, 4, plastic flexible pipe, 5, micro-suction pump, 6, rubber hose, 7, Continuous Instrument for Radon, 8, centre bore, 9, small air inlet hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As depicted in figs. 1 and 2, in the coal rock layer of different layers position, a kind of underground, radon gas separates out concentration in-situ determination method, comprises the following steps:
A. according to existing exploratory bore-hole 2 position, work plane earth's surface 1, and in conjunction with work plane log sheet information, carry out different layers position, the underground coal rock layer that radon gas separates out concentration determination needed for determining, and be numbered L respectively from top to bottom
1~ L
n;
B. opening Continuous Instrument for Radon 7 works after 1h, and according to on-the-spot air pressure and humiture situation, the coefficient of determination of automatic calibration Continuous Instrument for Radon 7, to obtain measurement result accurately, has calibrated rear closedown Continuous Instrument for Radon 7;
C. cylinder type hollow rubber piston 3 is fixedly set in by the centre bore 8 on its upper surface on the termination of being with graduated plastic flexible pipe 4, and having plastic flexible pipe 4 termination of cylinder type hollow rubber piston 3 to put into exploratory bore-hole 2 in cover, the other end of described plastic flexible pipe 4 is connected with micro-suction pump 5; Described cylinder type hollow rubber piston 3 sidewall mid point is arranged with four small air inlet holes 9, and external diameter and exploratory bore-hole 2 aperture of cylinder type hollow rubber piston 3 match, and the aperture of described centre bore 8 and the external diameter of plastic flexible pipe 4 match; Described micro-suction pump 5 is connected with Continuous Instrument for Radon 7 by rubber hose 6;
D. L is measured
1when radon gas in coal rock layer separates out concentration, by the soffit of rubber piston 3 and L
1the lower boundary alignment of coal rock layer, first opens micro-suction pump 5 and works after 1h, and then opens Continuous Instrument for Radon 7 and start to measure, and often measures 1h and records a determination data, altogether continuous measurement 3h, and three determination datas obtained are recorded as C respectively
11, C
12and C
13, get the average of three as L
1radon gas in coal rock layer separates out concentration, is designated as C
1;
E. according to steps d, L is measured successively
2, L
3l
n, and respectively final measurement is designated as C
2, C
3c
n, terminate until measure.
In order to record the concentration that in the coal rock layer of different layers position, radon gas is separated out more accurately, the height of described cylinder type hollow rubber piston 3 is 5 ~ 10cm, and described small air inlet hole 9 aperture is 5mm.
In order to make radon gas energy evenly stably at soft Bottomhole pressure, make measurement result more accurate, the aperture of described plastic flexible pipe 4 is 10mm, and the aperture of described rubber hose 6 is 5mm.
The model of described Continuous Instrument for Radon 7 can be KJD-2000R, RAD7, BY68-1027, HYB03-BH3212 or SLT-2000R; In order to reduce costs and be applicable to outdoor cryogenic conditions, the model of the Continuous Instrument for Radon 7 selected in the present invention is KJD-2000R.
In order to make radon gas energy evenly stably at soft Bottomhole pressure, make measurement result more accurate, the working flow of described micro-suction pump 5 is 1L/min.
Claims (5)
1. in the coal rock layer of underground different layers position, radon gas separates out a concentration in-situ determination method, it is characterized in that: comprise the following steps:
A. according to work plane earth's surface (1) existing exploratory bore-hole (2) position, and in conjunction with work plane log sheet information, carry out different layers position, the underground coal rock layer that radon gas separates out concentration determination needed for determining, and be numbered L respectively from top to bottom
1~ L
n;
B. after opening Continuous Instrument for Radon (7) work 1h, according to on-the-spot air pressure and humiture situation, the coefficient of determination of automatic calibration Continuous Instrument for Radon (7), to obtain measurement result accurately, has calibrated rear closedown Continuous Instrument for Radon (7);
C. cylinder type hollow rubber piston (3) is fixedly set in by the centre bore (8) on its upper surface on the termination of the graduated plastic flexible pipe of band (4), and being had by cover the plastic flexible pipe of cylinder type hollow rubber piston (3) (4) termination to put into exploratory bore-hole (2), the other end of described plastic flexible pipe (4) is connected with micro-suction pump (5); Described cylinder type hollow rubber piston (3) sidewall mid point is arranged with four small air inlet holes (9), external diameter and exploratory bore-hole (2) aperture of cylinder type hollow rubber piston (3) match, and the aperture of described centre bore (8) and the external diameter of plastic flexible pipe (4) match; Described micro-suction pump (5) is connected with Continuous Instrument for Radon (7) by rubber hose (6);
D. L is measured
1when radon gas in coal rock layer separates out concentration, by the soffit of rubber piston (3) and L
1the lower boundary alignment of coal rock layer, first open micro-suction pump (5) work 1h after, and then open Continuous Instrument for Radon (7) start measure, often measure 1h record a determination data, continuous measurement 3h altogether, and three determination datas obtained are recorded as C respectively
11, C
12and C
13, get the average of three as L
1radon gas in coal rock layer separates out concentration, is designated as C
1;
E. according to steps d, L is measured successively
2, L
3l
n, and respectively final measurement is designated as C
2, C
3c
n, terminate until measure.
2. in the coal rock layer of different layers position, a kind of underground according to claim 1, radon gas separates out concentration in-situ determination method, it is characterized in that: the height of described cylinder type hollow rubber piston (3) is 5 ~ 10cm, and described small air inlet hole (9) aperture is 5mm.
3. in the coal rock layer of different layers position, a kind of underground according to claim 1 and 2, radon gas separates out concentration in-situ determination method, and it is characterized in that: the aperture of described plastic flexible pipe (4) is 10mm, the aperture of described rubber hose (6) is 5mm.
4. in the coal rock layer of different layers position, a kind of underground according to claim 1 and 2, radon gas separates out concentration in-situ determination method, it is characterized in that: the model of described Continuous Instrument for Radon (7) is KJD-2000R.
5. in the coal rock layer of different layers position, a kind of underground according to claim 1 and 2, radon gas separates out concentration in-situ determination method, it is characterized in that: the working flow of described micro-suction pump (5) is 1L/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510893267.2A CN105545299B (en) | 2015-12-08 | 2015-12-08 | Concentration in-situ determination method is precipitated in radon gas in a kind of coal rock layer of underground different layers position |
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|---|---|---|---|
| CN201510893267.2A CN105545299B (en) | 2015-12-08 | 2015-12-08 | Concentration in-situ determination method is precipitated in radon gas in a kind of coal rock layer of underground different layers position |
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|---|---|
| CN105545299A true CN105545299A (en) | 2016-05-04 |
| CN105545299B CN105545299B (en) | 2018-10-02 |
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Cited By (8)
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| CN106569252A (en) * | 2016-10-28 | 2017-04-19 | 核工业北京地质研究院 | Method of correcting consistency of gamma total amount measurement type active carbon emanometer |
| CN106569253A (en) * | 2016-10-28 | 2017-04-19 | 核工业北京地质研究院 | Method for finely calibrating gamma total amount measurement type activated carbon radon measurement instrument |
| CN108152172A (en) * | 2017-12-04 | 2018-06-12 | 福建师范大学 | The measuring system and method for a kind of radon diffusion coefficient |
| CN108680467A (en) * | 2018-05-21 | 2018-10-19 | 南华大学 | The method of underground engineering in-site detecting radon diffusion coefficient and the radon production rate that can migrate |
| CN112098625A (en) * | 2020-09-05 | 2020-12-18 | 宁波弘宇检测有限公司 | Radon gas detection method |
| CN112709602A (en) * | 2020-12-16 | 2021-04-27 | 中国矿业大学 | Surrounding rock loosening ring measuring method based on radon gas evolution concentration |
| CN114114439A (en) * | 2020-08-26 | 2022-03-01 | 神华神东煤炭集团有限责任公司 | Automatic monitoring device and method for self-repairing condition of overburden mining-induced fracture |
| CN116429663A (en) * | 2023-06-08 | 2023-07-14 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569253A (en) * | 2016-10-28 | 2017-04-19 | 核工业北京地质研究院 | Method for finely calibrating gamma total amount measurement type activated carbon radon measurement instrument |
| CN106569252A (en) * | 2016-10-28 | 2017-04-19 | 核工业北京地质研究院 | Method of correcting consistency of gamma total amount measurement type active carbon emanometer |
| CN106569253B (en) * | 2016-10-28 | 2019-04-16 | 核工业北京地质研究院 | A kind of method of the total measurement type Activated Carbon Instrument for testing Radon of fine adjustment gamma |
| CN108152172B (en) * | 2017-12-04 | 2020-06-16 | 福建师范大学 | System and method for measuring radon diffusion coefficient |
| CN108152172A (en) * | 2017-12-04 | 2018-06-12 | 福建师范大学 | The measuring system and method for a kind of radon diffusion coefficient |
| CN108680467B (en) * | 2018-05-21 | 2020-07-10 | 南华大学 | Method for in-situ determination of radon diffusion coefficient and transportable radon generation rate in underground engineering |
| CN108680467A (en) * | 2018-05-21 | 2018-10-19 | 南华大学 | The method of underground engineering in-site detecting radon diffusion coefficient and the radon production rate that can migrate |
| CN114114439A (en) * | 2020-08-26 | 2022-03-01 | 神华神东煤炭集团有限责任公司 | Automatic monitoring device and method for self-repairing condition of overburden mining-induced fracture |
| CN112098625A (en) * | 2020-09-05 | 2020-12-18 | 宁波弘宇检测有限公司 | Radon gas detection method |
| CN112098625B (en) * | 2020-09-05 | 2022-10-25 | 宁波弘宇检测有限公司 | Radon gas detection method |
| CN112709602A (en) * | 2020-12-16 | 2021-04-27 | 中国矿业大学 | Surrounding rock loosening ring measuring method based on radon gas evolution concentration |
| CN112709602B (en) * | 2020-12-16 | 2021-10-29 | 中国矿业大学 | Surrounding rock loosening ring measuring method based on radon gas evolution concentration |
| CN116429663A (en) * | 2023-06-08 | 2023-07-14 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
| CN116429663B (en) * | 2023-06-08 | 2023-09-12 | 太原理工大学 | Device and method for measuring radon gas seepage rate in coal-rock medium |
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