CN103591922B - Short range seam mining upper Seam Floor Failure degree of depth radon gas detection method - Google Patents
Short range seam mining upper Seam Floor Failure degree of depth radon gas detection method Download PDFInfo
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- CN103591922B CN103591922B CN201310613577.5A CN201310613577A CN103591922B CN 103591922 B CN103591922 B CN 103591922B CN 201310613577 A CN201310613577 A CN 201310613577A CN 103591922 B CN103591922 B CN 103591922B
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- 238000005065 mining Methods 0.000 title claims abstract description 52
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052704 radon Inorganic materials 0.000 title claims abstract description 44
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000003245 coal Substances 0.000 claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000010009 beating Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 9
- 230000006399 behavior Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010242 baoji Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Short range seam mining upper Seam Floor Failure degree of depth radon gas detection method, according to upper coal seam and the next coal seam spacing, in conjunction with upper working face of coal seam tilt length, determines required rectangular detection region; In upper seam mining process, in fixed rectangular detection region, diagonally arrange survey line in advance, then on every bar survey line, arrange measuring point respectively; Drilling in the upper seat earth rock stratum of Vertical dimension, each measuring point place, is then sealed in the air exhaust rod of emanometer in boring, and by rubber hose, air exhaust rod is connected to emanometer; Open emanometer to start to measure, each measuring point measures 3 hours, and measurement result is transferred in notebook computer and draw radon concentration change curve, in conjunction with concrete geologic condition, analyze upper seat earth rock mass mining-induced fissure evolution Feature, inverting can draw the upper Seam Floor Failure degree of depth.The method is workable, and data acquisition is easy, and efficiency is high, has practicality and generalization widely.
Description
Technical field
The present invention relates to a kind of Seam Floor Failure depth finding method, belong to coal mine underground production technique field, especially a kind of coal seam spacing h that is applicable to is short range seam mining upper Seam Floor Failure degree of depth radon gas detection method between 5.0 ~ 10.0m.
Background technology
In recent years, short range seam mining causes the great attention on mining circle gradually in China, its reason mainly contains two aspects: first, it is very large that proportion is deposited and exploited in the tax of China's contiguous seams, all there is the problem that contiguous seams (group) is exploited in most of mining area, as grand in Baoji, Datong District, great Tun, Gujiao City, Handan, the Huaibei, Huainan, Huozhou, well, open the mining areas such as Luan, tafelberg, Shuangyashan, waterside town, Western Hills, new river in Shangdong Province; Second, through extensive high tension coal mining for many years, make occurrence condition good coal seam, most of mining area reserves fewer and feweri, cause many mining areas subordinate's mine to face resource exhaustion and nervous situation is taken in production, therefore many mines are forced to the short range seam mining problem having to rethink in field with "nine squares".
For mutil-coal seam mining, when upper and lower coal seam spacing is larger, less on the next seam mining impact after upper seam mining, in actual production, Strata Behaviors in Longwall Mining Strata Behavior and conventional single coal bed are exploited substantially identical.But along with coal seam spacing be reduced to a certain degree time, the highly significant that influences each other exploited between upper and lower coal seam.Particularly when short range seam mining, damage and failure in various degree can be caused to the next roof (i.e. upper seat earth) after upper seam mining, and the section coal pillar left over after upper seam mining easily formed stress concentrate, and this stress will transmit to floor strata deep, cause the next roof structure and ambient stress that larger change occurs, show that strata behaviors is fairly obvious, bring great difficulty to the next coal mining roadway layout and supporting.At present, two kinds are mainly contained: one is after upper seam mining about short range seam mining experience, the next coal mining roadway is arranged again after roof caving is stable, plate destructing depth and leave over stress of coal pillar and concentrate caused impact after not taking into full account upper seam mining, the next coal mining roadway is caused to be arranged unreasonable, strata behaviors is violent, and roadway maintenance is very difficult; Another kind is upper and lower coal seam harmonic extraction simultaneously, and to avoid upper seam mining the floor damage to the influence of time effect of the next seam mining as far as possible, but on-the-spot actual tissue implementation difficulty is larger.Therefore, how quantitatively to grasp the short range seam mining upper seat earth damage and failure degree of depth accurately and effectively, for the next coal mining roadway position selection and supporting parameter are determined to provide foundation, become the Practical Project problem that short range seam mining is urgently to be resolved hurrily.
Current, the research means for the upper Seam Floor Failure degree of depth of short range seam mining mainly contains theory calculate, numerical simulation and field measurement.In theory calculate, due to relevant concrete geologic condition can be simplified in computation process, thus cause final calculation result to differ with on-site actual situations strengthening; In numerical simulation, because numerical model modeling parameters chooses comparatively difficulty, thus there is the phenomenon that truly cannot reflect on-the-spot reality; Actual measurement aspect at the scene, existing detection method exists and is subject to the shortcomings such as mining conditions restriction, causes passing judgment on result of detection whether accurate and effective, has had a strong impact on contiguous seams safety and high efficiency.
Radon (Rn) is a kind of chemical element, and its three kinds of common radioactive isotopes are
219rn,
220rn and
222rn, usually said radon refers to
222rn, has the half life period of 3.82 days.The common elemental form of radon is radon gas, be the mankind touch uniquely there is the heaviest radioactive inert gas, it is extensively present among the coal of occurring in nature, rock, soil and water.Under field conditions (factors), radon has stronger transfer ability.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 microporosity; This just provides foundation for utilizing radon gas to detect the short range seam mining upper seat earth rock mass mining-induced fissure damage and failure degree of depth.
Summary of the invention
Technical matters: the object of the invention is to provide a kind of reliable and effective short range seam mining upper Seam Floor Failure degree of depth radon gas detection method to overcome the deficiencies in the prior art part.
Technical scheme: short range seam mining of the present invention upper Seam Floor Failure degree of depth radon gas detection method:
A. according to upper coal seam and the next coal seam spacing h, in conjunction with upper working face of coal seam tilt length, required short range seam mining upper Seam Floor Failure degree of depth rectangular detection region is determined;
B. in upper seam mining process, diagonally arrange two surveys line in advance in fixed rectangular detection region, be then spaced a distance layout measuring point respectively on every bar survey line;
C. the diameter beating certain depth in the upper seat earth rock stratum of Vertical dimension, each measuring point place is the boring of 5cm, then the air exhaust rod of Continuous Instrument for Radon is sealed in boring, and is that the air exhaust rod at each measuring point place is connected to a Continuous Instrument for Radon by the rubber hose of 5mm respectively by diameter;
D. open Continuous Instrument for Radon to start to measure, each measuring point measures 3 hours, and measurement result is transferred in notebook computer by USB data line draw radon concentration change curve, after all measuring point measurements complete, according to the radon concentration change curve of measuring points all in rectangular detection region, in conjunction with concrete geologic condition, analyze upper seat earth rock mass mining-induced fissure evolution Feature, inverting can draw the upper Seam Floor Failure degree of depth.
Measuring point spacing distance on described every bar survey line is 50 ~ 60m; In the upper seat earth rock stratum of described Vertical dimension, the degree of depth of drilling is 50cm; Described Continuous Instrument for Radon is KJD-2000R Continuous Instrument for Radon.
Beneficial effect: the present invention is when the upper Seam Floor Failure degree of depth of detection short range seam mining, only need arrange measuring point in advance in fixed rectangular detection region, then in the upper seat earth rock stratum of Vertical dimension, drilling installs air exhaust rod, and utilize rubber hose that air exhaust rod is connected to Continuous Instrument for Radon, can in-situ measurement work be carried out.The method whole process installation work amount is little, and data acquisition is easy, and do not limit by the concrete mining conditions in down-hole, workable, cost is low, and efficiency is high, has practicality and generalization widely.
Accompanying drawing explanation
Accompanying drawing is on-the-spot radon gas detection operations schematic diagram of the present invention.
In figure: the upper coal seam of 1-; The next coal seam of 2-; The upper working face of coal seam of 3-; 4-rectangular detection region; 5-survey line; 6-measuring point; 7-air exhaust rod; 8-rubber hose; 9-Continuous Instrument for Radon; 10-USB data line; 11-notebook computer.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Short range seam mining of the present invention upper Seam Floor Failure degree of depth radon gas detection method, before carrying out on-the-spot radon gas detection operations, according to upper coal seam 1 and the next coal seam 2 spacing h, in conjunction with upper working face of coal seam 3 tilt length, determine plate destructing depth rectangular detection region, required short range seam mining upper coal seam 14.In the recovery process of upper coal seam 1, diagonally arrange two surveys line 5 in advance in fixed rectangular detection region 4, be then spaced a distance layout measuring point 6 respectively on every bar survey line 5, and measuring point 6 spacing distance on every bar survey line 5 is 50 ~ 60m.The diameter beating certain depth in each measuring point 6 place Vertical dimension upper coal seam 1 floor strata is the boring of 5cm, in the floor strata of Vertical dimension upper coal seam 1, the degree of depth of drilling is 50cm, then the air exhaust rod 7 of Continuous Instrument for Radon 9 is sealed in boring, and be that the air exhaust rod 7 at each measuring point 6 place is connected to a Continuous Instrument for Radon 9 by the rubber hose 8 of 5mm respectively by diameter, Continuous Instrument for Radon 9 is KJD-2000R Continuous Instrument for Radon.Open Continuous Instrument for Radon 9 to start to measure, each measuring point 6 measures 3 hours, and measurement result is transferred in notebook computer 11 by USB data line 10 draw radon concentration change curve, after all measuring points 6 have been measured, according to the radon concentration change curve of measuring points 6 all in rectangular detection region 4, in conjunction with concrete geologic condition, analyze upper coal seam 1 floor rock mining crack evolution feature, inverting can draw upper coal seam 1 plate destructing depth.
Claims (4)
1. short range seam mining upper Seam Floor Failure degree of depth radon gas detection method, is characterized in that:
A. according to upper coal seam (1) and the next coal seam (2) spacing h, in conjunction with upper working face of coal seam (3) tilt length, the upper coal seam of required short range seam mining (1) plate destructing depth rectangular detection region (4) is determined;
B. in upper coal seam (1) recovery process, diagonally arrange two surveys line (5) in advance in fixed rectangular detection region (4), be then spaced a distance layout measuring point (6) respectively on every bar survey line (5);
C. the diameter beating certain depth in each measuring point (6) the place upper coal seam of Vertical dimension (1) floor strata is the boring of 5cm, then the air exhaust rod (7) of Continuous Instrument for Radon (9) is sealed in boring, and is that the air exhaust rod (7) at each measuring point (6) place is connected to a Continuous Instrument for Radon (9) by the rubber hose (8) of 5mm respectively by diameter;
D. open Continuous Instrument for Radon (9) to start to measure, each measuring point (6) is measured 3 hours, and measurement result is transferred to drafting radon concentration change curve in notebook computer (11) by USB data line (10), after all measuring points (6) have been measured, according to the radon concentration change curve of all measuring points (6) in rectangular detection region (4), in conjunction with concrete geologic condition, analyze upper coal seam (1) floor rock mining crack evolution feature, inverting can draw upper coal seam (1) plate destructing depth.
2. short range seam mining according to claim 1 upper Seam Floor Failure degree of depth radon gas detection method, is characterized in that: measuring point (6) spacing distance on described every bar survey line (5) is 50 ~ 60m.
3. short range seam mining according to claim 1 upper Seam Floor Failure degree of depth radon gas detection method, is characterized in that: in the upper coal seam of described Vertical dimension (1) floor strata, the degree of depth of drilling is 50cm.
4. short range seam mining according to claim 1 upper Seam Floor Failure degree of depth radon gas detection method, is characterized in that: described Continuous Instrument for Radon (9) is KJD-2000R Continuous Instrument for Radon.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB201412352D0 (en) | 2014-07-11 | 2014-08-27 | Corentium As | Radon monitor |
| CN104360405B (en) * | 2014-12-02 | 2016-08-24 | 中国矿业大学 | A kind of composite geophysical methods of stope overlying strata dynamic moving feature |
| CN104832163B (en) * | 2015-05-20 | 2017-05-31 | 辽宁工程技术大学 | The dangerous monitoring method of bump in a kind of coal mine underground exploitation |
| CN107345484B (en) * | 2017-06-29 | 2019-10-15 | 中国矿业大学 | A kind of high seam lower leaf " mixing top plate " integrality detection and its control method |
| CN110610043B (en) * | 2019-09-10 | 2022-11-11 | 辽宁工程技术大学 | Method for calculating damage depth of inclined coal seam goaf bottom plate |
| 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 |
| CN114000919B (en) * | 2021-10-26 | 2023-05-05 | 中国矿业大学 | Reasonable distance determination method for advanced reinforcement support of working face stope roadway |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853555A (en) * | 2009-10-04 | 2010-10-06 | 樊铁山 | Method and system for monitoring spontaneous fire in early stage of coal bed by radon measuring method |
| CN201886019U (en) * | 2010-12-02 | 2011-06-29 | 中国矿业大学 | Solid-gas coupling integrated testing system for radon gas surface exploration overlying strata mining-induced fissures |
| CN102997886A (en) * | 2012-11-15 | 2013-03-27 | 内蒙古科技大学 | Monitoring method for remotely measuring and controlling damage depths of floor strata |
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| US8770306B2 (en) * | 2010-05-25 | 2014-07-08 | The Board Of Trustees Of The Leland Stanford Junior University | Inert gas injection to help control or extinguish coal fires |
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Patent Citations (3)
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| CN101853555A (en) * | 2009-10-04 | 2010-10-06 | 樊铁山 | Method and system for monitoring spontaneous fire in early stage of coal bed by radon measuring method |
| CN201886019U (en) * | 2010-12-02 | 2011-06-29 | 中国矿业大学 | Solid-gas coupling integrated testing system for radon gas surface exploration overlying strata mining-induced fissures |
| CN102997886A (en) * | 2012-11-15 | 2013-03-27 | 内蒙古科技大学 | Monitoring method for remotely measuring and controlling damage depths of floor strata |
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Inventor after: Zhang Wei Inventor after: Zhang Dongsheng Inventor after: Wu Lixin Inventor after: Wang Xufeng Inventor after: Xu Mengtang Inventor after: Wang Hongzhi Inventor before: Zhang Wei Inventor before: Zhang Dongsheng Inventor before: Wang Xufeng Inventor before: Xu Mengtang Inventor before: Wang Hongzhi |
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