CN102540275A - Coal body dilatation detector for coal mining surface and detection method of coal body dilatation detector - Google Patents
Coal body dilatation detector for coal mining surface and detection method of coal body dilatation detector Download PDFInfo
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- CN102540275A CN102540275A CN2012100306408A CN201210030640A CN102540275A CN 102540275 A CN102540275 A CN 102540275A CN 2012100306408 A CN2012100306408 A CN 2012100306408A CN 201210030640 A CN201210030640 A CN 201210030640A CN 102540275 A CN102540275 A CN 102540275A
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Abstract
The invention discloses a coal body dilatation detector for a coal mining surface and a detection method of the coal body dilatation detector. The coal body dilatation detector is characterized in that: a large-diameter steel pipe and a small-diameter steel pipe passing through the large-diameter steel pipe are arranged in a sleeve structure, wherein the small-diameter steel pipe can axially move in the large-diameter steel pipe; steel elastic sheets are respectively arranged at the front ends of the large-diameter steel pipe and the small-diameter steel pipe in shape of an umbrella, and each steel elastic sheet expanded in a bore hole is in a form of pallet such that the large-diameter steel pipe and the small-diameter steel pipe are respectively fixed at corresponding positions; and a scale mark is axially arranged at the tail part of the small-diameter steel pipe and is used for measuring axially relative displacement between the large-diameter steel pipe and the small-diameter steel pipe. According to the invention, the coal body dilatation detector is applied to detecting the coal body dilatation expansion caused by the coal mining surface influenced by a mining stress, and an effectively detecting method is provided for researching a coal body dilatation situation of the coal mining surface.
Description
Technical field
The present invention relates to a kind of coal face coal dilatation detector and detection method, be used for directly the scene being carried out in the coal body dilatation and survey, with the rule of confirming that coal-face the place ahead is influenced by mining-induced stress to cause the coal body dilatation to expand in the working face mining process.
Background technology
Coal petrography mash gas dynamic disaster is the significant problem that influences coal mine production safety, so the preventing and controlling of coal petrography mash gas dynamic disaster are significant.The absorption and the desorb balance of gas in the coal body broken in the dilatation of coal-face the place ahead coal body, sharply changes thereby produce the gas pressure gradient, is prone to cause coal petrography mash gas dynamic disaster; Technical measures such as effective coal seam release are implemented in the zone that dilatation takes place to the workplace coal seam, can reach the purpose of effective control coal rock dynamic disaster; Therefore realizing the effective detection to coal-face the place ahead coal body dilatancy, is the important prerequisite condition of effectively implementing the measure of coal rock dynamic disaster Prevention Technique, but instrument and the method still the dilatancy of workplace the place ahead coal body not surveyed at present.
Summary of the invention
In order to address the above problem, the present invention provides a kind of coal face coal dilatation detector and detection method, is used to survey the volume change rule that coal-face the place ahead coal body is adopted with workplace, to judge coal body whether the dilatancy that volume increases takes place.
The technical scheme that the present invention is adopted for its technical matters of solution is:
The design feature of coal face coal dilatation detector of the present invention is: large diameter steel pipe is set and is applied in the minor-diameter steel-tube in the large diameter steel pipe with tube-in-tube structure, said minor-diameter steel-tube can axially move in large diameter steel pipe; Be umbrella at the front end of said large diameter steel pipe and minor-diameter steel-tube and be respectively arranged with each steel shell fragment, rise each steel shell fragment in boring of support is that form with ratchet is separately fixed on the relevant position large diameter steel pipe and minor-diameter steel-tube; At the said scale mark that is provided for measuring the axial relative shift between large diameter steel pipe and the minor-diameter steel-tube at the afterbody of minor-diameter steel-tube vertically.
The design feature of coal face coal dilatation detector of the present invention also is:
The diameter that large diameter steel pipe is set is 40mm, and the diameter of minor-diameter steel-tube is 35mm; The open diameter of each steel shell fragment of said large diameter steel pipe front end is 60mm, and the open diameter of minor-diameter steel-tube front end steel shell fragment is 55mm.
The scale division value of said minor-diameter steel-tube afterbody scale mark is 1mm, and range is not less than 500mm.
The characteristics of the detection method of coal face coal dilatation detector of the present invention are:
A, arrange that above the coal seam is surveyed a tunnel; Holed to coal seam construction detection by the base plate of surveying the tunnel in the place ahead that in said detection tunnel, is arranged in working face wall; Said detection boring is vertical with the coal seam, and said detection boring gets into 1.5m in the coal seam at least;
B, coal face coal dilatation detector is placed in surveys in the boring, make the pipe front end of minor-diameter steel-tube reach the bottom, hole of surveying boring, and make the pipe front end of pipe front end and the minor-diameter steel-tube of large diameter steel pipe be no less than the distance of 1.5m apart; The afterbody scale value L1 of record coal face coal dilatation this moment detector;
C, along with the propelling of workplace; The afterbody scale of the said coal face coal dilatation of real-time monitored detector changes; Obtain in the coal body 2 relative shift with the afterbody scale changing value of said coal face coal dilatation detector, characterize coal body dilatation degree with said relative shift.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, the present invention can survey the coal body dilatation expansion rule that coal-face is influenced by mining-induced stress to cause, and has realized the detection to coal-face the place ahead coal body dilatancy, for research coal-face the place ahead coal body dilatancy provides detection method;
2, panel detector structure of the present invention is simple, and is easy to operate.
Description of drawings
Fig. 1 is a panel detector structure synoptic diagram of the present invention;
Fig. 2 is a detector front end synoptic diagram of the present invention;
Fig. 3 is a detection method synoptic diagram of the present invention;
Label among the figure: 11 large diameter steel pipes; 12 minor-diameter steel-tubes; 3a large-diameter pipe steel shell fragment; 3b small diameter tube steel shell fragment; 14 scale marks; 21 detection tunnels; 22 coal seams; 23 borings; 24 working face walls; 25 goafs.
Embodiment
Referring to Fig. 1 and Fig. 2, the coal face coal dilatation detector in the present embodiment is to adopt tube-in-tube structure, large diameter steel pipe 11 is set and is applied in the minor-diameter steel-tube 12 in the large diameter steel pipe 11, and minor-diameter steel-tube 12 can axially move in large diameter steel pipe 11; Be umbrella at the front end of large diameter steel pipe 11 and be provided with each large-diameter pipe steel shell fragment 3a, be umbrella at the front end of minor-diameter steel-tube 12 and be provided with each small diameter tube steel shell fragment 3b; Be evenly to distribute in steel pipe front end periphery with four steel shell fragments in the present embodiment, rise each steel shell fragment in boring of support is that form with ratchet makes large diameter steel pipe 11 and minor-diameter steel-tube 12 be separately fixed on the relevant position not displacement backward; Be provided for measuring the scale mark 14 of the axial relative shift between large diameter steel pipe 11 and the minor-diameter steel-tube 12 vertically at the afterbody of minor-diameter steel-tube 12.
In the practical implementation, the diameter that large diameter steel pipe 11 can be set is 40mm, and each large-diameter pipe steel shell fragment 3a is after opening, and the diameter of the disk that its each steel shell fragment front end is is 60mm; The diameter of minor-diameter steel-tube 12 is 35mm, and each small diameter tube steel shell fragment 3b is after opening, and the diameter of its each steel shell fragment disk that front end is is 55mm; The scale division value that minor-diameter steel-tube 12 afterbody scale marks 14 are set is 1mm, and range is not less than 500mm.
When dilatancy that coal body generation volume increases, minor-diameter steel-tube 12 is subjected to displacement with respect to the deep of large diameter steel pipe 11 to boring 23, and displacement is read by scale mark 14, judges with this whether coal body dilatation takes place.
Detection method is as shown in Figure 3:
At first; The 25m position arranges that is surveyed a tunnel 21 above coal seam 22; In surveying tunnel 21, hole 23 by the detection of in coal seam 22, construct of the base plate of surveying tunnel 21 apart from the 100m position, the place ahead of working face wall 24; The diameter of surveying boring 23 is 45mm, and it is vertical with coal seam 22 to survey boring 23, and surveys and hole 23 to get in the coal seam 22 1.5m at least dark.
Then; Coal face coal dilatation detector is placed in the detection boring 23; The bottom, hole that the pipe front end of minor-diameter steel-tube 12 is reached survey boring 23, and the pipe front end of the pipe front end that makes large diameter steel pipe 11 and minor-diameter steel-tube 12 is at a distance of many distances of 1.5m; The afterbody scale value L1 of record coal body dilatation this moment detection instrument.
Along with the propelling of workplace, the afterbody scale of real-time monitored coal body dilatation detection instrument changes, with the afterbody scale changing value sign coal body dilatation degree of coal body dilatation detection instrument.Be positioned at shown in Fig. 3 working face wall 24 the rear be goaf 25.In the present embodiment, survey the position of tunnel 21 above the workplace coal seam and can suitably adjust according to concrete field condition; Surveying the distance of boring 23 and workplace, is principle to guarantee enough observed ranges, can suitably adjust according to concrete field condition.
Claims (4)
1. coal face coal dilatation detector is characterized in that: large diameter steel pipe (11) is set and is applied in the minor-diameter steel-tube (12) in the large diameter steel pipe (11) with tube-in-tube structure, said minor-diameter steel-tube (12) can axially move in large diameter steel pipe (11); Be umbrella at the front end of said large diameter steel pipe (11) and minor-diameter steel-tube (12) and be respectively arranged with each steel shell fragment, rise each steel shell fragment in boring of support is that form with ratchet is separately fixed on the relevant position large diameter steel pipe (11) and minor-diameter steel-tube (12); Be provided for measuring the scale mark (14) of the axial relative shift between large diameter steel pipe (11) and the minor-diameter steel-tube (12) vertically at said afterbody at minor-diameter steel-tube (12).
2. coal face coal dilatation detector according to claim 1, the diameter that it is characterized in that being provided with large diameter steel pipe (11) is 40mm, the diameter of minor-diameter steel-tube (12) is 35mm; The open diameter of each steel shell fragment of said large diameter steel pipe (11) front end is 60mm, and the open diameter of minor-diameter steel-tube (12) front end steel shell fragment is 55mm.
3. coal face coal dilatation detector according to claim 1 is characterized in that the scale division value of said minor-diameter steel-tube (12) afterbody scale mark (14) is 1mm, and range is not less than 500mm.
4. the detection method of the said coal face coal dilatation of claim 1 detector is characterized in that:
A, (22) top arranges that is surveyed a tunnel (21) in the coal seam; The place ahead that in said detection tunnel (21), is arranged in working face wall is surveyed boring (23) by the base plate of surveying tunnel (21) to coal seam (22) construction; Said detection boring (23) is vertical with coal seam (22), and said detection boring (23) gets into 1.5m in the coal seam (22) at least;
B, coal face coal dilatation detector is placed in surveys in the boring (23); The bottom, hole that the pipe front end of minor-diameter steel-tube (12) is reached survey boring (23), and make the pipe front end of pipe front end and the minor-diameter steel-tube (12) of large diameter steel pipe (11) be no less than the distance of 1.5m apart; The afterbody scale value L1 of record coal face coal dilatation this moment detector;
C, along with the propelling of workplace; The afterbody scale of the said coal face coal dilatation of real-time monitored detector changes; Obtain in the coal body 2 relative shift with the afterbody scale changing value of said coal face coal dilatation detector, characterize coal body dilatation degree with said relative shift.
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| CN 201210030640 CN102540275B (en) | 2012-02-10 | 2012-02-10 | Coal body dilatation detector for coal mining surface and detection method of coal body dilatation detector |
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| CN 201210030640 CN102540275B (en) | 2012-02-10 | 2012-02-10 | Coal body dilatation detector for coal mining surface and detection method of coal body dilatation detector |
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| CN201310127426.9A Division CN103207418B (en) | 2012-02-10 | 2012-02-10 | Coal mass volume-expanding detector for coal face and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473425A (en) * | 2013-09-23 | 2013-12-25 | 安徽理工大学 | Distinguishing method for mining-induced stress acting working surface coal dilatation based on binary discrete model |
| CN107560590A (en) * | 2017-09-21 | 2018-01-09 | 中国矿业大学(北京) | A kind of mobile coal rock mass deformation monitoring system and its monitoring method |
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| US20070131417A1 (en) * | 2005-12-09 | 2007-06-14 | Baker Hughes Incorporated | Casing resonant radial flexural modes in cement bond evaluation |
| CN202075271U (en) * | 2011-05-31 | 2011-12-14 | 河南理工大学 | Rectangular pressure relief opening pressure plate sealing mechanism of coal or rock gas dynamic disaster simulation device |
| CN202421520U (en) * | 2012-02-10 | 2012-09-05 | 安徽理工大学 | Detector for detecting coal mass on coalface |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070131417A1 (en) * | 2005-12-09 | 2007-06-14 | Baker Hughes Incorporated | Casing resonant radial flexural modes in cement bond evaluation |
| CN202075271U (en) * | 2011-05-31 | 2011-12-14 | 河南理工大学 | Rectangular pressure relief opening pressure plate sealing mechanism of coal or rock gas dynamic disaster simulation device |
| CN202421520U (en) * | 2012-02-10 | 2012-09-05 | 安徽理工大学 | Detector for detecting coal mass on coalface |
Non-Patent Citations (1)
| Title |
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| 尹光志等: "突出煤和非突出煤全应力_应变瓦斯渗流试验研究", 《岩土力学》, vol. 32, no. 6, 30 June 2011 (2011-06-30), pages 1613 - 1619 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473425A (en) * | 2013-09-23 | 2013-12-25 | 安徽理工大学 | Distinguishing method for mining-induced stress acting working surface coal dilatation based on binary discrete model |
| CN103473425B (en) * | 2013-09-23 | 2016-08-24 | 安徽理工大学 | Based on Discrete-time Model with Two Neurons mining induced stress effect work surface coal dilatation method of discrimination |
| CN107560590A (en) * | 2017-09-21 | 2018-01-09 | 中国矿业大学(北京) | A kind of mobile coal rock mass deformation monitoring system and its monitoring method |
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