CN104847346A - Coal spontaneous combustion gas marker acquiring device for goaf - Google Patents
Coal spontaneous combustion gas marker acquiring device for goaf Download PDFInfo
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- CN104847346A CN104847346A CN201510300743.5A CN201510300743A CN104847346A CN 104847346 A CN104847346 A CN 104847346A CN 201510300743 A CN201510300743 A CN 201510300743A CN 104847346 A CN104847346 A CN 104847346A
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- Prior art keywords
- voltage tube
- goaf
- spontaneous combustion
- pipes
- coal spontaneous
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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
Abstract
The invention discloses a coal spontaneous combustion gas marker acquiring device for a goaf. The coal spontaneous combustion gas marker acquiring device comprises high-pressure pipes (1) arranged along an oxidation and heating zone and the air return shaft direction, the high-pressure pipes (1) are axially and fixedly connected by connecting casings (4), the middle of each high-pressure pipe (1) is provided with a detector pipe (2) communicated with the inside of the high-pressure pipe (1), a plurality of binding pipes (3) connected with an air sucking pump are arranged in the high-pressure pipes (1), the other ends of the binding pipes (3) extend into the detector pipes (2) and the ends of the binding pipes (3) are fixed at the ends of the detector pipes (2) by fixing clamps (7). The coal spontaneous combustion gas marker acquiring device is resistant to high pressure and high in strength, the pipeline is protected from cracking by rock mass collapse of the goaf, and bending can meet actual arrangement needs within a certain radius; the high-pressure pipes are rubber pipes and are resistant to high temperature and anti-ageing, service lives of the high-pressure pipes are prolonged, oxidation and corrosion under the action of high-temperature smoke and water steam can be prevented, and the coal spontaneous combustion gas marker acquiring device is durable and has excellent structure stability.
Description
Technical field
What the present invention relates to is a kind of beam tube collector and method, particularly relates to gas collecting device in underground goaf, ore deposit.
Background technology
Gas analysis got by the pre-buried beam tube in underground goaf, ore deposit is the research Residual coal in goaf oxidation regularity of distribution, determines the Main Means of work plane spontaneous combustion in goaf " three bands " distribution.At present, China's overwhelming majority mine goaf utilizes vacuum air pump that sample gas is evacuated to ground by pre-buried beam tube, utilizes the situation of change of chromatography gas composition.To the early prediction of heterogeneous goaf fire and the identification of fire hazard degree.But find in practice, the beam tube line part of gas beam tube monitoring system and measuring point place circuit design become whole system and to break down maximum parts.Because beam tube is outward water pipe precaution, its pipeline number is more, circuit is long, beam tube shunt case and snap joint is more, for plastic material and caliber is less, the easy ponding of beam tube line, laying dust cause beam tube line plugging fault, even occur blocking; More commonly coal and rock inbreak or mechanical collision make steel pipe destroy, cause beam tube line to leak air, even cause the open circuit of pipeline pressure break, can draw through practical test and similarity simulation experiment data at present, goaf coal and rock inbreak stress, about about 5Mpa, maximumly reaches 7Mpa.At present, to this situation also comparatively not effective alarm mechanism and maintenance measure, cause beam tube monitoring system for gases in coal mine testing result inaccurate, affect practicality and the reliability of beam tube monitoring system for gases in coal mine.At present, layout mostly layout at upper and lower crossheading in goaf, an inner still blind area, goaf, causes partial interior high temperature dot cannot detect formation hidden danger, causes monitoring not form all-dimensional multi-angle.To sum up, deficiency can be summarized as:
(1) its intensity of water pipe precaution is poor and without pliability, difficult in maintenance, and ore deposit pressure and the easy pressure break beam tube of erecting dense individual props coal and rock cause gas leakage, or directly pounds disconnected pipeline and cause short circuit;
(2) measuring point probe place circuit design is unreasonable, and easy ponding, coal and rock dust easily enter, and is difficult to remove after entering; Affect gas transport to detect.
(3) monitoring point, goaf is arranged unreasonable, does not realize goaf omnibearing stereo multi-angle monitoring.
Summary of the invention
The object of the invention is to provide mine goaf coal spontaneous combustion index gas harvester, and it can solve problem existing in background technology effectively.
In order to solve problem existing in background technology, it comprises the high-voltage tube 1 arranged along in goaf oxidation intensification band and direction, return aircourse, axially be connected and fixed by splicing sleeve 4 between described high-voltage tube 1, the middle part of each high-voltage tube 1 is provided with the probe pipe 2 be connected with its inside, several beam tube 3 be connected with negative pressure taking device of air is provided with in described high-voltage tube 1, the other end of this beam tube 3 extends in each probe pipe 2, and the end of described beam tube 3 is fixed near the end of probe pipe 2 by fixing card 7.
Described probe pipe 2 is connected with high-voltage tube 1 by threeway 5 or bipass 8, and described threeway 5 or bipass 8 are fixed on the inwall in goaf respectively by reinforcing anchor pole 6, and wherein, bipass 8 is positioned at the outermost end of high-voltage tube 1.
One end of described high-voltage tube 1 is frustro-pyramidal structure, its conical surface is provided with the outside draw-in groove 10 of a few equidistant arrangement, the other end of described high-voltage tube 1 is provided with inner draw-in groove 9, inside draw-in groove 9 snap-fit engagement that splicing sleeve 4 and upper saves high-voltage tube 1 is passed in one end that described high-voltage tube 1 is provided with outside draw-in groove 10, the inside of described splicing sleeve 4 is provided with internal thread, and described high-voltage tube 1 adjacent one end be arranged near outside draw-in groove 10 is provided with the external screw thread 11 coordinated that to spin with female connector pipe 4 internal thread.
Described probe pipe 2 entirety is U-shaped structure.
Described negative pressure taking device of air is at least one that automatic negative-pressure aspiration pump or Manual negative pressure are bled in air bag.
Owing to have employed above technical scheme, the present invention has following beneficial effect:
(1) anti-high pressure, intensity greatly, can not only prevent goaf coal and rock inbreak pressure break pipeline, more can bend in certain radius and meet actual arrangement demand;
(2) high-voltage tube is rubber tube, high temperature resistant anti-aging, life-extending, can prevent oxidation and corrosion under the effect of high-temperature flue gas and water vapour, creep rupture strength, and have good structure stability;
(3) measuring point tube head is U-shaped design, can not only prevent goaf coal and rock inbreak and cause blocking the mouth of pipe, can also ensure that gas obtains by water proof and dust proof;
(4) high-voltage tube connects the embedded screw thread reinforcing mode of employing, can not only connect by sealing and reinforcing, more can play the effect of protection high-voltage tube termination;
(5) high-voltage tube and measuring point tube head connecting tee bottom design are dull and stereotyped and reinforce anchor pole, and surrounding rope is stretching provides guarantee for fixing measuring point probe and pressure duct, and plan that zone gas adds reliability in advance for the actual goaf of Accurate Measurement;
(6) negative pressure taking device of air is built-in power, and intrinsic safety type designs, and is applicable to ore deposit mine gas real-time automatic collecting, safe and efficient;
(7) carry out netted layouting according to goaf size, accurately can differentiate goaf " three bands " scope, for coal spontaneous combustion control provides scientific basis.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the layout schematic diagram of monitoring point in the present invention;
Fig. 2 is pipeline structure figure of the present invention;
Fig. 3 is the enlarged drawing of high-voltage tube.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention being clearly and completely described.
Referring to Fig. 1-3, this detailed description of the invention is achieved by the following technical solutions, it comprises the high-voltage tube 1 arranged along in goaf oxidation intensification band and direction, return aircourse, axially be connected and fixed by splicing sleeve 4 between described high-voltage tube 1, the middle part of each high-voltage tube 1 is provided with the probe pipe 2 be connected with its inside, several beam tube 3 be connected with negative pressure taking device of air is provided with in described high-voltage tube 1, the other end of this beam tube 3 extends in each probe pipe 2, and the end of described beam tube 3 is fixed near the end of probe pipe 2 by fixing card 7.
Described probe pipe 2 is connected with high-voltage tube 1 by threeway 5 or bipass 8, described threeway 5 or bipass 8 are fixed on the inwall in goaf respectively by reinforcing anchor pole 6, make probe pipe 2 can in goaf along empty side certain altitude, and not by inbreak coal and rock and other obstructions collide displacement, wherein, bipass 8 is positioned at the outermost end of high-voltage tube 1.
One end of described high-voltage tube 1 is frustro-pyramidal structure, its conical surface is provided with the outside draw-in groove 10 of a few equidistant arrangement, the other end of described high-voltage tube 1 is provided with inner draw-in groove 9, inside draw-in groove 9 snap-fit engagement that splicing sleeve 4 and upper saves high-voltage tube 1 is passed in one end that described high-voltage tube 1 is provided with outside draw-in groove 10, the inside of described splicing sleeve 4 is provided with internal thread, and described high-voltage tube 1 adjacent one end be arranged near outside draw-in groove 10 is provided with the external screw thread 11 coordinated that to spin with female connector pipe 4 internal thread.
Described probe pipe 2 entirety is U-shaped structure.
Described negative pressure taking device of air is at least one that automatic negative-pressure aspiration pump or Manual negative pressure are bled in air bag.
Described beam tube 3 by it is numbered and color treatments determine its position, goaf of bleeding belonging to body, and CO, CO are carried out to the gas extracted out
2, C
2h
2, C
2h
4, C
2h
6detect in real time Deng gas, to determine temperature and coal body spontaneous combustion situation in goaf.
Described high-pressure rubber pipe 1, can according to actual goaf coal and rock inbreak pressure, be designed to flexible high pressure resistant be 10 ~ 20Mpa, aperture is 30 ~ 200mm sebific duct.Joint length is 5m ~ 50m.Current high-voltage tube is commercially classified the more ripe extraction being applied to the complicated mineral resources such as formation structures underground, underground water, oil, natural gas, mainly comprise pipe in core outer tube, core, sleeve pipe, etc., material is also different.
The design consideration Residual coal in goaf thickness of described probe pipe 2, region leakage intensity and the parameter such as temperature and surrounding environment determine size L1 and L2, material selection Steel Tube Special, can increase port area for obtaining gas, in funnel-form.
Further illustrate getting gas implementation method for certain ore goaf:
Spontaneous combustion in goaf can be divided into three bands substantially, and namely heat-radiation belt, oxidation heat up and be with and suffocative zone.These three bands are dynamic change in working face, mainly affect by face propulsion speed, goaf the minimum thickness, goaf limit leakage intensity, goaf limit oxygen concentration four factors.But the stacking states of loose coal and thickness are to provide the material base of coal body spontaneous combustion.According to digging experience in the past, the more region of the inner float coal in goaf is upper and lower crossheading.Because fully mechanized mining is at twice not Sub-Level Caving, in mining process, the effect of pressing with being subject to, coal body, across falling, easily forms loose condition (of surface), is deposited in crossheading, along with the propelling of work plane, this part float coal enters deep, goaf, reaches the accumulation of heat environment needed for spontaneous combustion of float and condition of leaking out, easily causes spontaneous fire.
For ore deposit, Shandong 2302N work plane, carry out work plane point layout, work plane moves towards long 950m, is inclined to long 300m, adopts single longwell retrusive coal-mining method.Fig. 1 is face work and point layout schematic diagram, from cutting eye, serves as theme in goaf with upper and lower crossheading, wholely layouts as netted even arrangement.In advance of the face process, carry out pipeline pre-buried, realize the gas change in the whole goaf of real-time monitored, finally divide goaf three band according to the gas concentration isogram of monitoring point.Along with the propelling of work plane, progressively increase monitoring point, according to face width, in figure, Lm is horizontal monitoring point spacing, is set to 50m, and Ln is Longitudinal Surveillance dot spacing, is set to 100m.Laterally every 200m carries out monitoring of bleeding, and can determine " three bands " region within the scope of this, along with the propelling of work plane, " three bands " also moves thereupon, presents certain correlation.Finally draw oxidation intensification bandwidth and region, thus provide scientific basis for coal spontaneous combustion prevention and control
Owing to have employed above technical scheme, this detailed description of the invention has following beneficial effect:
(1) anti-high pressure, intensity greatly, can not only prevent goaf coal and rock inbreak pressure break pipeline, more can bend in certain radius and meet actual arrangement demand;
(2) high-voltage tube is rubber tube, high temperature resistant anti-aging, life-extending, can prevent oxidation and corrosion under the effect of high-temperature flue gas and water vapour, creep rupture strength, and have good structure stability;
(3) measuring point tube head is U-shaped design, can not only prevent goaf coal and rock inbreak and cause blocking the mouth of pipe, can also ensure that gas obtains by water proof and dust proof;
(4) high-voltage tube connects the embedded screw thread reinforcing mode of employing, can not only connect by sealing and reinforcing, more can play the effect of protection high-voltage tube termination;
(5) high-voltage tube and measuring point tube head connecting tee bottom design are dull and stereotyped and reinforce anchor pole, for fixing measuring point probe and pressure duct provide guarantee, and plan that zone gas adds reliability in advance for the actual goaf of Accurate Measurement;
(6) negative pressure taking device of air is built-in power, and intrinsic safety type designs, and is applicable to ore deposit mine gas real-time automatic collecting, safe and efficient;
(7) carry out netted layouting according to goaf size, accurately can differentiate goaf " three bands " scope, for coal spontaneous combustion control provides scientific basis.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art should be appreciated that it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a mine goaf coal spontaneous combustion index gas harvester, it is characterized in that it comprises the high-voltage tube (1) arranged along in goaf oxidation intensification band and direction, return aircourse, axially be connected and fixed by splicing sleeve (4) between described high-voltage tube (1), the middle part of each high-voltage tube (1) is provided with the probe pipe (2) be connected with its inside, several beam tube (3) be connected with negative pressure taking device of air is provided with in described high-voltage tube (1), the other end of this beam tube (3) extends in each probe pipe (2), the end of described beam tube (3) is fixed near the end of probe pipe (2) by fixing card (7).
2. mine goaf coal spontaneous combustion index gas harvester according to claim 1, it is characterized in that described probe pipe (2) is connected with high-voltage tube (1) by threeway (5) or bipass (8), described threeway (5) or bipass (8) are fixed on the inwall in goaf respectively by reinforcing anchor pole (6), wherein, bipass (8) is positioned at the outermost end of high-voltage tube (1).
3. mine goaf coal spontaneous combustion index gas harvester according to claim 1, it is characterized in that one end of described high-voltage tube (1) is frustro-pyramidal structure, its conical surface is provided with the outside draw-in groove (10) of a few equidistant arrangement, the other end of described high-voltage tube (1) is provided with inner draw-in groove (9), inside draw-in groove (9) snap-fit engagement that splicing sleeve (4) and upper saves high-voltage tube (1) is passed in one end that described high-voltage tube (1) is provided with outside draw-in groove (10), the inside of described splicing sleeve (4) is provided with internal thread, described high-voltage tube (1) adjacent one end be arranged near outside draw-in groove (10) is provided with the external screw thread (11) coordinated that to spin with female connector pipe (4) internal thread.
4. mine goaf coal spontaneous combustion index gas harvester according to claim 1, is characterized in that described probe pipe (2) entirety is U-shaped structure.
5. mine goaf coal spontaneous combustion index gas harvester according to claim 1, is characterized in that described negative pressure taking device of air is at least one that automatic negative-pressure aspiration pump or Manual negative pressure are bled in air bag.
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| CN201510300743.5A CN104847346A (en) | 2015-05-27 | 2015-05-27 | Coal spontaneous combustion gas marker acquiring device for goaf |
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| CN201510300743.5A CN104847346A (en) | 2015-05-27 | 2015-05-27 | Coal spontaneous combustion gas marker acquiring device for goaf |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105697063A (en) * | 2016-01-28 | 2016-06-22 | 郑州光力科技股份有限公司 | Mining fire behavior early warning method and system based on multi-parameter cross-over analysis |
| CN107091114A (en) * | 2017-06-29 | 2017-08-25 | 辽宁工程技术大学 | A kind of coal mine gob beam tube protection device and its application method |
| CN107219101A (en) * | 2017-06-23 | 2017-09-29 | 安徽理工大学 | A kind of Purely mechanical goaf beam tube collector and method |
| CN109184800A (en) * | 2018-10-15 | 2019-01-11 | 西安科技大学 | A kind of coal spontaneous combustion early warning stage division and method for early warning |
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| CN105697063A (en) * | 2016-01-28 | 2016-06-22 | 郑州光力科技股份有限公司 | Mining fire behavior early warning method and system based on multi-parameter cross-over analysis |
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| CN107219101B (en) * | 2017-06-23 | 2019-07-09 | 安徽理工大学 | A kind of Purely mechanical goaf beam tube collector and method |
| CN107091114A (en) * | 2017-06-29 | 2017-08-25 | 辽宁工程技术大学 | A kind of coal mine gob beam tube protection device and its application method |
| CN109184800A (en) * | 2018-10-15 | 2019-01-11 | 西安科技大学 | A kind of coal spontaneous combustion early warning stage division and method for early warning |
| CN109184800B (en) * | 2018-10-15 | 2020-05-29 | 西安科技大学 | Coal spontaneous combustion early warning classification method and early warning method |
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