CN103412095B - Multi-parameter device for monitoring coal and gas outburst under condition of multi-field coupling - Google Patents
Multi-parameter device for monitoring coal and gas outburst under condition of multi-field coupling Download PDFInfo
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- CN103412095B CN103412095B CN201310375686.8A CN201310375686A CN103412095B CN 103412095 B CN103412095 B CN 103412095B CN 201310375686 A CN201310375686 A CN 201310375686A CN 103412095 B CN103412095 B CN 103412095B
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Abstract
The invention discloses a multi-parameter device for monitoring coal and gas outburst under the condition of multi-field coupling. The device comprises a confining pressure chamber base, a steel cylinder, a confining pressure cavity upper cover, an outburst opening sealing taper sleeve, a sealing aluminium sheet, a sealing screw plug, a lifting screw rod, a load sensor, a lower bearing plate, a confining pressure piston, a telescopic steel sleeve and a rubber sleeve, wherein the steel cylinder is placed on the confining pressure chamber base; confining pressure seal rings are arranged between the confining pressure cavity upper cover and the steel cylinder; the lower bearing plate is arranged in the steel cylinder; the confining pressure piston is sleeved at the upper part of the lower bearing plate and is in seal fit with the lower bearing plate; the outburst opening sealing taper sleeve is pressed in a tapered opening of the confining pressure cavity upper cover; the telescopic steel sleeve is installed between the confining pressure cavity upper cover and the lower bearing plate; the rubber sleeve is arranged outside the telescopic steel sleeve; the sealing aluminium sheet is arranged on the outburst opening sealing taper sleeve; and the sealing screw plug is screwed in the upper end of the confining pressure cavity upper cover. The device can adopt raw coal in different sizes to carry out coal and gas outburst tests in the triaxial stress state to study the coal and gas outburst occurrence principles more comprehensively and scientifically.
Description
Technical field
The present invention relates to a kind of coal and gas prominent multi-parameter monitoring devices, particularly relate to a kind of multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices.
Background technology
Coal and gas prominent is a kind of extremely complicated dynamic phenomenon of underground coal mine, and it seriously threatens Safety of Coal Mine Production, affects the performance of coal production ability.At driving face, particularly often coal and non-coal postponing bursting occurs in stone door punching coal process, it is the coal and gas prominent that after explosion or operation, a period of time inherent explosion or operation place occur.Steeply pitching seam etc. first time outstanding occur after also once occurred secondary outstanding or even three times outstanding.According to incompletely statistics; there is a few percent that postponing bursting number of times accounts for total outstanding number of times in the whole nation; although proportion is little; but because " extension ", this kind of giving prominence to often exceeds the unexpected of people, the defer time of postponing bursting; without certain rule; short then a few minutes, long then tens hours, even several days; Secondary is given prominence to and is also often occurred in the scale removal process after giving prominence to for the first time; If outstanding time, just in time run into workplace have people to carry out operation or outstanding to last time after clearing up, personnel can not withdraw in time, very harmful to miner, and cause great casualties and property loss, mine safety production in serious threat.The mechanism that coal and gas prominent occurs and form are complicated, along with the increase of coal mining depth and mining conditions day by day complicated, the generation of coal and gas prominent is also difficult to prediction more, at present, the study mechanism of Chinese scholars to coal and gas prominent makes certain gains, but most achievement is all the hypothesis that field statistics data and laboratory study propose.These hypothesis all can only be described a part of phenomenon of certain of coal and gas prominent, can't form the complete Principle System of quantification.Utilize existing hypothesis to predict very large difficulty to coal and gas prominent, and accuracy is not high, this just brings huge hidden danger to mine safety production.
At present, mainly there is following problem in the device carrying out coal and gas prominent test: the test specimen that (1) adopts mostly is moulded coal, although moulded coal has similarity with raw coal to a certain extent, still there is larger difference in both, and the research to coal and gas prominent mechanism has certain limitation; (2) part moulded coal sample dimensions is comparatively large, and the test preparatory period is longer; (3) device is installed comparatively complicated; (4) device can only produce and once give prominence to, and can not reflect down-hole coal and gas prominent phenomenon really; (5) aspis opening speed is comparatively slow, have impact on the time of coal and gas prominent to a certain extent, can not close to field condition.
Summary of the invention
For above shortcomings in prior art, the invention provides a kind of multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices.The method can adopt the raw coal of different size to carry out coal and gas prominent test under triaxial stress state, and the mechanism occurred coal and gas prominent is carried out more comprehensively, more scientific research.
In order to solve the problems of the technologies described above, present invention employs following technical scheme:
Multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices, comprise confined pressure room base, steel cylinder, confined pressure chamber upper cover, aspis seal taper sleeve, sealing aluminium flake, sealing plug, elevating screw, load sensor, lower bearing plate, confined pressure piston, flexible steel bushing and gum cover; Described steel cylinder is placed on the base of confined pressure room, arranges confined pressure O-ring seal between described confined pressure chamber upper cover and steel cylinder, and confined pressure chamber upper cover is pressed on steel cylinder by pull bar; Described lower bearing plate to be arranged in steel cylinder and to be slidably matched with the inwall of steel cylinder, and described elevating screw is vertically arranged on the below of lower bearing plate and withstands on lower bearing plate by load sensor; The tapered structure in top of described lower bearing plate, described confined pressure piston bush is on the top of lower bearing plate and be sealed and matched with lower bearing plate, and described confined pressure piston coordinates with the inner wall sealing of steel cylinder; The middle part of described confined pressure chamber upper cover is large conical hollow structure suitable for reading, is sealed and matched in the bell that described aspis seal taper sleeve is pressed in confined pressure chamber upper cover with confined pressure chamber upper cover; Described flexible steel bushing is arranged between confined pressure chamber upper cover and lower bearing plate, and described gum cover is enclosed within outside flexible steel bushing; Laying temperature sensor, pressure transducer, shaft position sensor and radial extensometer in described flexible steel bushing; Described sealing aluminium flake is arranged on aspis seal taper sleeve, and described sealing plug to screw in the upper port of confined pressure chamber upper cover and is pressed on sealing aluminium flake, and sealing aluminium flake and aspis seal taper sleeve are sealed and matched.
As a preferred embodiment of the present invention, the inner hole wall of aspis seal taper sleeve is provided with aspis baroceptor.
Compared with prior art, multi-scenarios method Coal Under of the present invention and Gas Outburst multi-parameter monitoring devices tool have the following advantages:
1, this device can adopt the raw coal of different size to carry out coal and gas prominent test under triaxial stress state, and the mechanism occurred coal and gas prominent is carried out more comprehensively, more scientific research.
2, this device can monitor the gas pressure of raw coal body in outstanding front and back, stress-strain state and temperature variations, to reach the target being familiar with coal and gas prominent mechanism under various factors effect; Because adopt raw coal to test in test, result more tallies with the actual situation, and can better disclose the effect of various factors.
3, this device can be familiar with the destruction of outstanding process to coal body, provides support for layering soft in coal seam and outstanding coal study on the genesis; For the degree of impairment of coal body under outstanding role and the research of micro-damage state provide basis.So that the mechanism that more scientific research coal and gas prominent produces, that form science, perfect theory, for the control of colliery to coal and gas prominent is provided fundamental basis.
Accompanying drawing explanation
Fig. 1 is the structural representation of multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices;
Fig. 2 is the structural representation of multi-scenarios method Coal Under and the top seal of Gas Outburst multi-parameter monitoring devices;
Fig. 3 is the structural representation of multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices lower seal.
In accompanying drawing: 1-elevating screw; 2-load sensor; 3-gas inlet pipe; 4-lower bearing plate; 5-confined pressure piston; 6-confined pressure O-ring seal; 7-cable sealed joint; 8-radial extensometer; 9-flexible steel bushing; 10-built-in foil gauge; 11-gum cover; 12-aspis seal taper sleeve; 13-O-ring seal; 14-sealing aluminium flake; 15-sealing plug; 16-aspis baroceptor; 17-vent valve; 18-confined pressure chamber upper cover; 19-confined pressure O-ring seal; 20-steel cylinder; 21-protection network; 22-pull bar; 23-pressing plate is installed; 24-confined pressure room base; 25-confined pressure penstocks; 26-vacuumize tracheae; 27-gas air intake duct; 28-press water inlet channel.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1,2 and 3, multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices, comprise confined pressure room base 24, steel cylinder 20, confined pressure chamber upper cover 18, aspis seal taper sleeve 12, sealing aluminium flake 14, sealing plug 15, elevating screw 1, load sensor 2, lower bearing plate 4, confined pressure piston 5, flexible steel bushing 9 and gum cover 11.Confined pressure room base 24 is arranged in frame by installing pressing plate 23, steel cylinder 20 is placed on confined pressure room base 24, arrange confined pressure O-ring seal 19 between confined pressure chamber upper cover 18 and steel cylinder 20, confined pressure chamber upper cover 18 is pressed on steel cylinder 20 by pull bar 22, arranges one deck protection network 21 outside steel cylinder 20.Lower bearing plate 4 to be arranged in steel cylinder 20 and to be slidably matched with the inwall of steel cylinder 20, and elevating screw 1 is vertically arranged on the below of lower bearing plate 4 and withstands on lower bearing plate 4 by load sensor 2; The tapered structure in top of lower bearing plate 4, confined pressure piston 5 is enclosed within the top of lower bearing plate 4 and is sealed and matched by gum cover 11 and lower bearing plate 4, and the outer wall of confined pressure piston 5 is coordinated with the inner wall sealing of steel cylinder 20 by confined pressure O-ring seal 6.The middle part of confined pressure chamber upper cover 18 is large conical hollow structure suitable for reading, is sealed and matched in the bell that aspis seal taper sleeve 12 is pressed in confined pressure chamber upper cover 18, confined pressure chamber upper cover 18 is provided with vent valve 17 by gum cover 11 and confined pressure chamber upper cover 18.Flexible steel bushing 9 is arranged between confined pressure chamber upper cover 18 and lower bearing plate 4, and gum cover 11 is enclosed within outside flexible steel bushing 9.Laying temperature sensor, pressure transducer, shaft position sensor and radial extensometer 8 in flexible steel bushing 9.Sealing aluminium flake 14 is arranged on aspis seal taper sleeve 12, and sealing plug 15 to screw in the upper port of confined pressure chamber upper cover 18 and is pressed on sealing aluminium flake 14, and sealing aluminium flake 14 is sealed and matched with aspis seal taper sleeve 12.Be provided with gas air intake duct 27 at the middle part of confined pressure piston 5 and lower bearing plate 4 and vacuumize air flue, gas air intake duct 27 is connected with gas inlet pipe 3, vacuumize air flue and vacuumize tracheae 26 and be connected, confined pressure piston 5 and lower bearing plate 4 keep to the side and be provided with press water inlet channel 28, and press water inlet channel 28 is connected with confined pressure penstocks 25.
When utilizing this multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices to test, step is as follows:
1) the raw coal test specimen that diameter is 50 ~ 100mm is extracted, raw coal test specimen to be contained in flexible steel bushing 9 and to be fixed by flexible steel bushing 9, flexible steel bushing 9 is arranged between confined pressure chamber upper cover 18 and lower bearing plate 4, then is enclosed within flexible steel bushing 9 with gum cover 11 and is sealed by raw coal test specimen outward.Make gas air intake duct 27 and vacuumize air flue to communicate with raw coal test specimen, in the present embodiment, vacuumize air flue and be communicated with gas air intake duct 27.Make to form confined pressure chamber between gum cover 11 and steel cylinder 20, confined pressure chamber communicates with press water inlet channel 28, and vent valve 17 communicates with in confined pressure chamber.
2) in flexible steel bushing 9, laying temperature sensor, pressure transducer, built-in foil gauge 10(comprise shaft position sensor and radial extensometer 8), complete the connection of various lead-in wire.The lead-in wire of radial extensometer 8 is connected with the cable splice on confined pressure piston 5 by cable sealed joint 7.
3) sealing aluminium flake 14 is arranged on aspis seal taper sleeve 12, and sealing plug 15 to screw in the upper port of confined pressure chamber upper cover 18 and is pressed on sealing aluminium flake 14, and sealing aluminium flake 14 is sealed and matched by O-ring seal 13 and aspis seal taper sleeve 12.Endoporus near aspis seal taper sleeve 12 is provided with aspis baroceptor 16.
4) start Data Control and acquisition system, the change of the stress of raw coal test specimen, temperature and gaseous tension before and after monitoring test, and it is gathered.
5) the raw coal test specimen in flexible steel bushing 9 is pressurizeed, by confined pressure penstocks 25 and press water inlet channel 28 to water filling in the confined pressure chamber between flexible steel bushing 9 and steel cylinder 20, confined pressure is applied to the raw coal test specimen in flexible steel bushing 9; By elevating screw 1, axial compression is applied to the raw coal test specimen in flexible steel bushing 9, axial compression and confined pressure are added to predetermined load.
6) carry out emptying to the air of gum cover 11 inside, when keeping axial compression and confined pressure constant with vacuum pump by vacuumizing tracheae 26 and vacuumizing the air that air flue takes out gum cover 11 inside, until gaseous tension is lower than 10Pa.
7) when keeping axial compression and confined pressure is constant, being filled with methane gas by gas inlet pipe 3 and gas air intake duct 27 to raw coal test specimen, making the adsorbed gas of raw coal test specimen reach equilibrium state, be filled with methane gas and must ensure more than 48h.
8) after everything in readiness, puncture sealing aluminium flake 14, the raw coal test specimen in gum cover 11 and methane gas produce outstanding; Real-Time Monitoring and collection are carried out to each data in whole experimentation.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. multi-scenarios method Coal Under and Gas Outburst multi-parameter monitoring devices, is characterized in that: comprise confined pressure room base (24), steel cylinder (20), confined pressure chamber upper cover (18), aspis seal taper sleeve (12), sealing aluminium flake (14), sealing plug (15), elevating screw (1), load sensor (2), lower bearing plate (4), confined pressure piston (5), flexible steel bushing (9) and gum cover (11); Described steel cylinder (20) is placed on confined pressure room base (24), arranges confined pressure O-ring seal (19) between described confined pressure chamber upper cover (18) and steel cylinder (20), and confined pressure chamber upper cover (18) is pressed on steel cylinder (20) by pull bar (22); Described lower bearing plate (4) to be arranged in steel cylinder (20) and to be slidably matched with the inwall of steel cylinder (20), and described elevating screw (1) is vertically arranged on the below of lower bearing plate (4) and withstands on lower bearing plate (4) by load sensor (2); The tapered structure in top of described lower bearing plate (4), described confined pressure piston (5) is enclosed within the top of lower bearing plate (4) and is sealed and matched with lower bearing plate (4), and described confined pressure piston (5) coordinates with the inner wall sealing of steel cylinder (20); The middle part of described confined pressure chamber upper cover (18) is large conical hollow structure suitable for reading, is sealed and matched in the bell that described aspis seal taper sleeve (12) is pressed in confined pressure chamber upper cover (18) with confined pressure chamber upper cover (18); Described flexible steel bushing (9) is arranged between confined pressure chamber upper cover (18) and lower bearing plate (4), and described gum cover (11) is enclosed within flexible steel bushing (9) outward; The interior laying temperature sensor of described flexible steel bushing (9), pressure transducer, shaft position sensor and radial extensometer (8); Described sealing aluminium flake (14) is arranged on aspis seal taper sleeve (12), described sealing plug (15) to screw in the upper port in confined pressure chamber upper cover (18) and is pressed in sealing aluminium flake (14), and sealing aluminium flake (14) and aspis seal taper sleeve (12) are sealed and matched.
2. multi-scenarios method Coal Under according to claim 1 and Gas Outburst multi-parameter monitoring devices, is characterized in that: on the inner hole wall of aspis seal taper sleeve (12), be provided with aspis baroceptor (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310375686.8A CN103412095B (en) | 2013-08-26 | 2013-08-26 | Multi-parameter device for monitoring coal and gas outburst under condition of multi-field coupling |
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| CN201310375686.8A CN103412095B (en) | 2013-08-26 | 2013-08-26 | Multi-parameter device for monitoring coal and gas outburst under condition of multi-field coupling |
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| CN103412095B true CN103412095B (en) | 2015-02-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103884822B (en) * | 2014-04-15 | 2015-12-30 | 西安科技大学 | A kind of coal and gas prominent simulation system and method |
| CN104775849B (en) * | 2015-03-23 | 2016-09-21 | 山东科技大学 | Colliery stope gas and coal spontaneous combustion coupling disaster monitoring system and monitoring method thereof |
| CN111964733A (en) * | 2020-09-16 | 2020-11-20 | 中国矿业大学(北京) | Digital-image real-time monitoring experimental device under condition of symmetrically decompressing gas and breaking coal |
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| CN202770787U (en) * | 2012-09-01 | 2013-03-06 | 山东科技大学 | Coal and gas acting testing device in true triaxial states |
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2013
- 2013-08-26 CN CN201310375686.8A patent/CN103412095B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN101226183A (en) * | 2008-01-22 | 2008-07-23 | 重庆大学 | Projecting simulator stand for coal and firedamp |
| CN101487834A (en) * | 2009-02-06 | 2009-07-22 | 煤炭科学研究总院重庆研究院 | Combined test apparatus for coal and gas burst |
| CN101806792A (en) * | 2010-04-15 | 2010-08-18 | 中国科学院力学研究所 | Coal and gas outburst simulation test device and protection device thereof |
| CN102095835A (en) * | 2011-01-19 | 2011-06-15 | 河南理工大学 | Device for simulating coal and gas outburst experiment |
| CN102507865A (en) * | 2011-10-21 | 2012-06-20 | 山东科技大学 | Simulation test system of coal-gas outburst during rock cross-cut coal uncovering |
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| CN202770787U (en) * | 2012-09-01 | 2013-03-06 | 山东科技大学 | Coal and gas acting testing device in true triaxial states |
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