CN103644940B - Gas pressure, gas flow and in-situ stress monitoring device and monitoring method in a kind of coal seam - Google Patents
Gas pressure, gas flow and in-situ stress monitoring device and monitoring method in a kind of coal seam Download PDFInfo
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Abstract
The invention discloses gas pressure in a kind of coal seam, gas flow and in-situ stress monitoring device, the Gas explosion burns sensor including data collecting instrument and being connected with gas pipe and crustal stress sensor, this Gas explosion burns sensor, crustal stress sensor are connected with data collecting instrument by data transmission link respectively；The invention also discloses gas pressure, gas flow and the method for crustal stress in employing said apparatus monitoring coal seam；Use technical scheme, gas pressure in the coal seam that crustal stress is monitored simultaneously, gas flow and the monitoring of crustal stress can be completed simultaneously.
Description
Technical field
The invention belongs to coal mining detection field, it is more particularly related to gas pressure, gas flow and in-situ stress monitoring device and use the monitoring method of above-mentioned monitoring device in a kind of coal seam.
Background technology
In coal seam, the occurrence status of gas is the key factor affecting production safety in coal seam, along with being continuously increased of the seam mining degree of depth, coal seam gas-bearing capacity is gradually increased, simultaneously because affected by seam mining, original crustal stress and mining induced stress are concentrated, gas permeability of coal seam occurs drastically to change, and causes drastically gushing out of gas the disasters such as gas such as Gas Outburst even occur；Practice have shown that, the various ANOMALOUS VARIATIONS of Gas explosion burns are typically the omen of Gas Disaster, and gas pressure, gas flow and crustal stress are the key factors causing Gas explosion burns to change, therefore coal seam is carried out Validity Test by the gas pressure under mining influence, flow and coal seam crustal stress rule significant.
In prior art detection coal seam while gas pressure, gas flow, it is impossible to monitor crustal stress, coal mining is difficult to avoid that the generation because detecting the Gas Disaster caused not in time simultaneously.
Summary of the invention
The technical problem to be solved is to provide gas pressure in a kind of coal seam detected and monitor crustal stress while gas pressure, gas flow in coal seam simultaneously, gas flow and in-situ stress monitoring device.
To achieve these goals, the technical scheme that the present invention takes is gas pressure, gas flow and in-situ stress monitoring device in a kind of coal seam provided, the Gas explosion burns sensor including data collecting instrument and being connected with gas pipe and crustal stress sensor, this Gas explosion burns sensor, crustal stress sensor are connected with data collecting instrument by data transmission link respectively.
Gas pressure in a kind of coal seam that the present invention provides, gas flow and in-situ stress monitoring device, Gas explosion burns sensor includes gas pressure sensor, gas flow sensor, gas pressure sensor and gas flow sensor are connected with first threeway of gas pipe one end respectively, junction arranges hydraulic quick coupler, the connection end of gas flow sensor and the first threeway is additionally provided with valve, the other end of gas flow sensor is additionally provided with escape pipe, gas pipe uses breathable fabric parcel away from one end of the first threeway, gas pipe is wound around with breathable fabric away from the tube wall of the first threeway, the size of the cross section of wound section is close to the cross section of instrument connection, gas pipe is positioned at the one or three middle part passing to tube wall wound section and is provided with fixed substance；Preferably breathable fabric is cotton gauze；Preferably fixed substance is cotton gauze.
Gas pressure, gas flow and in-situ stress monitoring device in a kind of coal seam that the present invention provides, crustal stress sensor includes that instrument connection pressure cushion, crustal stress sensor include instrument connection pressure cushion, high-pressure oil pipe, electronic digital display hydrostatic sensor and high-pressure oil pump, instrument connection pressure cushion is connected with one end of high-pressure oil pipe, the second threeway that the other end of high-pressure oil pipe is had by system is connected with electronic digital display hydrostatic sensor, and the other end of this second threeway is connected with high-pressure oil pump by pipeline.
Gas pressure, gas flow and in-situ stress monitoring device in a kind of coal seam that the present invention provides, instrument connection pressure cushion outer wall is additionally provided with inclusion enclave；Preferably inclusion enclave is to have elastic and creep-resistant property metal material to make.
Gas pressure, gas flow and in-situ stress monitoring device in a kind of coal seam that the present invention provides, instrument connection pressure cushion is all connected by hydraulic quick coupler with the junction with high-pressure oil pump with the junction of high-pressure oil pipe, the other end of high-pressure oil pipe and the junction of the second threeway and the second threeway；It is additionally provided with valve on the pipeline that described second threeway is connected with high-pressure oil pump；The fixed substance that described high-pressure oil pipe is arranged by gas pipe tube wall is fixing with gas pipe binding, the preferred cotton gauze of fixed substance.
Gas pressure, gas flow and in-situ stress monitoring device in a kind of coal seam that the present invention provides, data collecting instrument includes A/D change-over circuit and CPU processor, A/D change-over circuit is connected with CPU processor, and CPU processor is connected to program storage, display, data storage, RS232 communicating circuit, operation keyboard and standard signal output interface respectively.
A kind of use gas pressure, gas flow and the method for crustal stress in above-mentioned monitoring device monitoring coal seam, comprise the steps:
(1) in working face drilling testing hole；
(2) placing gas pipe, one end of gas pipe breathable fabric wraps up, and gas pipe is wound around near bottom, hole outer wall breathable fabric, and the cross section of the thickness of wound section is close to the cross section of instrument connection；
(3) it is connected with one end of high-pressure oil pipe after instrument connection pressure cushion outer wall being wrapped up, after binding is fixing in the middle part of high-pressure oil pipe and gas pipe, instrument connection pressure cushion one end is stretched in instrument connection, and instrument connection pressure cushion is sent at the bottom of hole；
(4) hydraulic oil flows into high-pressure oil pipe by high-pressure oil pump, the second threeway, is then injected into instrument connection pressure cushion and makes it expand at the bottom of blind hole；
(5) closed test hole, is then connected gas pressure sensor with gas pipe with gas flow sensor；
(6) turn-on data Acquisition Instrument, the gas pressure in instrument connection and stress of coal seam is sensed by gas pressure sensor and electronic digital display hydrostatic sensor, gather gas pressure and stress of coal seam data through data collecting instrument, by display displaying data in real-time and by data storage, data are stored；
(7) gas flow data are gathered, by gas pipe firedamp drainage gas, the methane gas flow by gas flow sensor sensing gas, data collecting instrument gathers gas flow, gas pressure, stress of coal seam, and data are also stored by display displaying data in real-time by data storage.
Gas pressure, gas flow and the method for crustal stress in the monitoring device monitoring coal seam that the present invention provides, the minimum measured value of gas flow is 0.05L/min.
Gas pressure, gas flow and the method for crustal stress in the monitoring device monitoring coal seam that the present invention provides, instrument connection is provided under working face side on crossheading, and instrument connection tilts the elevation angle of 5～10 °, and the degree of depth of instrument connection is 30～50m.
Gas pressure, gas flow and the method for crustal stress in the monitoring device monitoring coal seam that the present invention provides, the method in closed test hole is that instrument connection arranges Grouting Pipe, then to instrument connection slip casting, grouting amount is gas pipe when stopping flowing water with the breathable fabric of high-pressure oil pipe binding bearing parcel only, and the slurries injected in instrument connection include polyurethane, cement mortar.
nullUse gas pressure in a kind of coal seam provided by the present invention、Gas flow and in-situ stress monitoring device，The Gas explosion burns sensor including data collecting instrument and being connected with gas pipe and crustal stress sensor，This Gas explosion burns sensor、Crustal stress sensor is connected with data collecting instrument by data transmission link respectively，The invention also discloses gas pressure in monitoring device monitoring coal seam、Gas flow and the method for crustal stress，Use device disclosed by the invention，By by gas pressure sensor、Gas flow sensor and crustal stress sensor three organically combine，Make coal-bed gas pressure、The measurement of flow and crustal stress can synchronize to carry out，Decrease work operation and workload，The data being correlated with by data collecting instrument collection，And couple together with existing Coalmine Safety Supervision system substation，Not only by display and data storage, relevant data are carried out real-time monitoring and storage，Also can be by each terminal computer of real-time data transmission to ground，Gas pressure can be monitored again in real time、Flow、The dynamic change of crustal stress data，Simultaneously with polyurethane and cement mortar sealing of hole，The closure making instrument connection is more preferable.
Below with reference to drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Content expressed by width accompanying drawing each to this specification and the mark in figure are briefly described below:
Fig. 1 is gas pressure in a kind of coal seam of the present invention, gas flow and the schematic diagram of in-situ stress monitoring device；
Fig. 2 is gas pressure in a kind of coal seam of the present invention, gas flow and the scheme of installation of in-situ stress monitoring device；
Fig. 3 is gas pressure in a kind of coal seam of the present invention, gas flow and the floor map of the instrument connection shown in in-situ stress monitoring device；
Fig. 4 is gas pressure in a kind of coal seam of the present invention, gas flow and the data collecting instrument theory diagram shown in in-situ stress monitoring device；
Fig. 5 is gas pressure in one coal seam of the present invention, gas flow and in-situ stress monitoring installation method flow chart.
nullFigure is labeled as: 1、Instrument connection，2、Hydraulic quick coupler，3、Fixed substance，4、High-pressure oil pipe，5、Gas pipe，6、Wound section，7、Breathable fabric，8、Instrument connection pressure cushion，9、Inclusion enclave，10、Grouting Pipe，11、Electronic digital display hydrostatic sensor，12、Gas pressure sensor，13、High-pressure oil pipe，14、Valve，15、Gas flow sensor，16、Data transmission link，17、Layer of polyurethane，18、Escape pipe，19、High-pressure oil pump，20、Data collecting instrument，21、Program storage，22、A/D change-over circuit，23、CPU processor，24、Display，25、Data storage，26、RS232 communicating circuit，27、Operation keyboard，28、Standard signal output interface，29、Power supply，30、Monitoring system substation，31、Lower crossheading，32、First threeway，33、Hydraulic quick coupler，34、Second threeway，35、Hydraulic quick coupler，36、Hydraulic quick coupler，37、Hydraulic quick coupler，38、Hydraulic quick coupler，39、Hydraulic quick coupler，40、Cement mortar，41、Valve.
Detailed description of the invention
Below against accompanying drawing, by the description to embodiment, the detailed description of the invention of the present invention such as mutual alignment and annexation, the effect of each several part and operation principle, the manufacturing process between the involved shape of each component, structure, each several part and is operated with method etc., it is described in further detail, to help those skilled in the art that inventive concept, the technical scheme of the present invention are had more complete, accurate and deep understanding.
Fig. 1 is gas pressure in one coal seam of the present invention, gas flow and the schematic diagram of in-situ stress monitoring device, Fig. 2 is gas pressure in one coal seam of the present invention, gas flow and the scheme of installation of in-situ stress monitoring device, Fig. 3 is gas pressure in one coal seam of the present invention, the floor map of the instrument connection shown in gas flow and in-situ stress monitoring device, the present invention as depicted is gas pressure in a kind of coal seam, gas flow and in-situ stress monitoring device, the Gas explosion burns sensor including data collecting instrument and being connected with gas pipe and crustal stress sensor, this Gas explosion burns sensor, crustal stress sensor is connected with data collecting instrument 20 by data transmission link 16 respectively；Gas explosion burns sensor includes gas pressure sensor 12, gas flow sensor 15, gas pressure sensor 12 and gas flow sensor 15 are connected with first threeway 32 of gas pipe 5 one end respectively, junction arranges hydraulic quick coupler 2, 35, 36, the connection end of gas flow sensor 15 and the first threeway 32 is additionally provided with valve 14, the other end of gas flow sensor 15 is additionally provided with escape pipe 18, gas pipe 5 uses breathable fabric 7 to wrap up away from one end of the first threeway 32, gas pipe 5 is wound around with breathable fabric at the tube wall away from the first threeway 32, the size of the cross section of wound section 6 is close to the cross section of instrument connection, gas pipe 5 is positioned at the middle part of the first threeway 32 to tube wall wound section 6 and is provided with fixed substance 3；Preferably breathable fabric is cotton gauze；Preferably fixed substance 3 is cotton gauze；The size of the cross section of wound section 6 close to the cross section of instrument connection, prevents the cement mortar overflow injected and the mouth of pipe of gas pipe to blocking, causes the gas in instrument connection 1 can not pass through gas pipe；Use cotton gauze as wound section, it is ensured that when this part is sent in instrument connection 1, both ensured that touching hole wall has certain toughness, it is to avoid injury gas pipe 5, ensured that again wound section 6 is fitted with instrument connection 1 hole wall.
Crustal stress sensor includes instrument connection pressure cushion 8, high-pressure oil pipe 4, electronic digital display hydrostatic sensor 11 and high-pressure oil pump 19, instrument connection pressure cushion 8 is connected with one end of high-pressure oil pipe 4, the second threeway 34 that the other end of high-pressure oil pipe 4 is had by system is connected with electronic digital display hydrostatic sensor 11, the other end of this second threeway 34 is connected with high-pressure oil pump 19 by pipeline, and instrument connection pressure cushion 8 outer wall is additionally provided with inclusion enclave 9；Inclusion enclave 9 is to have elastic and creep-resistant property metal material to make；Instrument connection pressure cushion 8 is all connected by hydraulic quick coupler 37,38,39 with the junction with high-pressure oil pump 19 with junction, the other end of high-pressure oil pipe 4 and the junction of the second threeway 34 and second threeway 34 of high-pressure oil pipe 4；It is additionally provided with valve 41 on the pipeline that second threeway 34 is connected with high-pressure oil pump 19；The fixed substance 3 that high-pressure oil pipe 4 is arranged by gas pipe 5 tube wall is fixing with gas pipe 5 binding, the preferred cotton gauze of fixed substance 3；The diameter of inclusion enclave 9 is more than the diameter of instrument connection pressure cushion but is slightly less than the diameter of instrument connection 1, after injecting hydraulic oil in instrument connection pressure cushion, rising along with oil pressure, inclusion enclave 9 can expand therewith, and then reach the effect being close to instrument connection 1 wall, the existing good toughness of cotton gauze, in turn ensure that the firmness of winding, also has the strongest water penetration.
Fig. 4 is gas pressure in a kind of coal seam of the present invention, gas flow and the data collecting instrument theory diagram shown in in-situ stress monitoring device；Data collecting instrument includes A/D change-over circuit 22 and CPU processor 23, A/D change-over circuit 22 is connected with CPU processor 23, and CPU processor 23 is connected to program storage 21, display 24, data storage 25, RS232 communicating circuit 26, operation keyboard 27 and standard signal output interface 28 respectively.
Fig. 5 is gas pressure in one coal seam of the present invention, gas flow and in-situ stress monitoring installation method flow chart, and the present invention as depicted uses gas pressure in above-mentioned monitoring device monitoring coal seam, gas flow and the method for crustal stress, comprises the steps:
(1) in working face drilling testing hole；Instrument connection 1 is provided under working face on crossheading side, and instrument connection tilts the elevation angle of 5～10 °, hole depth 30～50m；After having constructed, clean out in hole；
(2) with cotton gauze 3, high-pressure oil pipe 4 and gas pipe 5 are bound, make high-pressure oil pipe 4 and gas pipe 5 interfix, and allow gas pipe 5 top and instrument connection pressure cushion 8 keep the distance of 8～10m；
(3) the top cotton gauze 7 at gas pipe 5 covers in order to avoid entering drilling cuttings to form blocking；
(4) below gas pipe 5, cotton gauze cincture at 1m, is used, until being wound the size cross section close to instrument connection of the cross section of part 6；
(5) by hydraulic quick coupler 33, high-pressure oil pipe 4 is coupled together with instrument connection pressure cushion 8；Instrument connection pressure cushion 8, inclusion enclave 9, the high-pressure oil pipe 4 being connected with instrument connection pressure cushion 8 and the fixing gas pipe 5 of high-pressure oil pipe 4 are made a gift to someone in instrument connection 1 in a predetermined direction, and allows instrument connection pressure cushion 8 arrive at the bottom of hole；
(6) electronic digital display hydrostatic sensor 11 is connected in threeway 34 by hydraulic quick coupler 39, the valve 41 being connected in threeway 34 by hydraulic quick coupler 38 is opened, instrument connection pressure cushion 8 oiling is given by high-pressure oil pump 19, instrument connection pressure cushion 8 is made to expand, close valve 41 when the display of electronic digital display hydrostatic sensor 11 shows when pressure reaches and stablizes in predetermined force value, remove high-pressure oil pump 19；
(7) being sealed with polyurethane 17 by instrument connection 1 mouthful, on the one hand the effect of polyurethane 17 is tentatively to block instrument connection 1 partly in order to prevent cement mortar 40 from flowing out from instrument connection 1；
(8) owing to coal seam there may be crack, in order to allow instrument connection 1 have better air-tightness, need instrument connection 1 is carried out slip casting, during slip casting, instrument connection 1 arranges Grouting Pipe 10, by Grouting Pipe 10, cement mortar 40 is injected in instrument connection 1, after the cement mortar 40 in instrument connection 1 arrives cotton gauze 6, owing to cotton gauze 6 has the effect hindering the solid in cement mortar 40 but can be permeable, rising along with water level, when water covers the top of gas pipe 5, water will flow out along the inwall of gas pipe 5, when water flows out from the bottom of gas pipe 5, illustrate that slip casting is complete, Grouting Pipe 10 is closed；
(9) stop, during flowing water, gas pressure sensor 12 and gas flow sensor 15 are installed bottom gas pipe 5, and by data transmission link 16, gas pressure sensor 12, gas flow sensor 15 and electronic digital display hydrostatic sensor 11 are coupled with on data collecting instrument 20；
(10) valve 14 with gas flow sensor 15 sequential series is closed, turn-on data Acquisition Instrument 20, the gas pressure in instrument connection 1 and stress of coal seam is sensed by gas pressure sensor 12 and electronic digital display hydrostatic sensor 11, through data collecting instrument 20 Real-time Collection gas pressure and stress of coal seam data, by display 24 displaying data in real-time and by data storage 25, data are stored；
(11) after prospect hole 1 internal gas pressure to be measured is stable with stress of coal seam, methane gas pressure data that data collecting instrument 20 is gathered and the methane gas pressure data that stress of coal seam data are respectively in instrument connection 1 and stress of coal seam data, now the methane gas pressure data gathered and stress of coal seam data are automatically processed through software and obtain the value of coal seam gas-bearing capacity and stress of coal seam value and store by data collecting instrument 20；
(12) when needs gather gas flow data, open and the valve 14 of gas flow sensor 15 sequential series, firedamp drainage gas, the flow of gas is sensed by gas flow sensor 15, data collecting instrument 20 Real-time Collection gas flow, gas pressure, stress of coal seam, data are also stored by display 24 displaying data in real-time by data storage 25；
(13) accomplish fluently from instrument connection 1 until instrument connection 1 is blocked after getting well, the gas density that gas density in instrument connection 1 is real in being less than coal body, along with the continuous gathering of gas in instrument connection, the gas density in instrument connection 1 moves closer to the gas density in coal body；When measuring gas flow, along with the continuous spilling of gas in instrument connection 1, the gas density that gas density in instrument connection 1 is gradually the most real less than in coal body, when display 24 shows that gas flow is less than 0.05L/min, closes the valve 14 with gas flow sensor 15 sequential series；
(14) adopt by data collecting instrument 20 Real-time Collection gas pressure, gas flow and stress of coal seam data with working face, by display 24 displaying data in real-time and by data storage 25, data are stored, also can be connected with existing KJ safety of coal mines monitor system substation by standard signal output interface 28, by in real-time data transmission to ground monitoring main frame, realize monitoring in real time and storage, until the advance of the face to instrument connection 1.
nullUse gas pressure in a kind of coal seam provided by the present invention、Gas flow and in-situ stress monitoring device，The Gas explosion burns sensor including data collecting instrument and being connected with gas pipe and crustal stress sensor，This Gas explosion burns sensor、Crustal stress sensor is connected with data collecting instrument by data transmission link respectively，The invention also discloses gas pressure in monitoring device monitoring coal seam、Gas flow and the method for crustal stress，Use device disclosed by the invention，By by gas pressure sensor、Gas flow sensor and crustal stress sensor three organically combine，Make coal-bed gas pressure、The measurement of flow and crustal stress can synchronize to carry out，Decrease work operation and workload，The data being correlated with by data collecting instrument collection，And couple together with existing Coalmine Safety Supervision system substation，Not only by display and data storage, relevant data are carried out real-time monitoring and storage，Also can be by each terminal computer of real-time data transmission to ground，Gas pressure can be monitored again in real time、Flow、The dynamic change of crustal stress data，Simultaneously with polyurethane and cement mortar sealing of hole，The closure making instrument connection is more preferable.
One provided by the present invention is used to detect device based on computer-controlled inspection shaft, including the aboveground support 1 being horizontally placed at catch pit port, the depth survey bar 2 that one end is affixed with aboveground support 1, the other end of this depth survey bar 2 is provided with the underground for probing measuring staff 3 that can rotate around depth survey bar 2, during use, aboveground support 1 is placed in the oral area of inspection shaft, depth survey bar 2 stretches into down-hole, by underground for probing measuring staff 3 portable electronic devices, very clear to the situation of down-hole, overcome prior art to be manually deep into down-hole and check the defect causing dangerous generation because subsurface environment is severe on the spot, improve the accuracy rate detected, reduce maintenance cost.
Aboveground support 1 is circular frame, and the edge of framework is provided with multiple support bar that may be stuck in catch pit port outer, facilitates the placement of inspection shaft detection device；Depth survey bar 2 is socketed to form by the hollow pipe that more piece caliber is different, this depth survey bar 2 connects end from aboveground support 1 to start caliber and increases successively, hollow pipe joining place adjacent after pulling open is provided with affixed buckle, this depth survey bar 2 tube wall is provided with the scale of the tolerance degree of depth, during use, gradually being stretched by depth survey bar 2, when contacting bottom, available scale value obtains current inspection shaft depth information；Use the socket of more piece hollow pipe, conveniently device is packed up placement, be convenient for carrying；Underground for probing measuring staff 3 is set in parallel with aboveground support 1, this underground for probing measuring staff 3 is the straight-bar that one end is connected with depth survey bar, the other end is free end, the degree of depth by the depth survey bar tolerance inspection shaft degree of depth, the situation in shaft bottom is it will be seen that by underground for probing measuring staff 3, by underground for probing measuring staff 3 portable electronic devices, accurately detect the truth of inspection shaft；Underground for probing measuring staff 3 is set in parallel with aboveground support 1, and after depth survey bar 2 is packed up, overall volume is less, is convenient for carrying；Being connected by swivel joint between underground for probing measuring staff 3 with depth survey bar 2, in probe procedure, when encountering hard thing or detect diverse location, underground for probing measuring staff 3 can rotate around depth survey bar 2 axis, not only convenient test, simultaneously avoiding device damage；The circular frame of aboveground support 1 uses with support bar threadeds, and facilitates maintenance and the replacing of parts；The axis of depth survey bar 2 overlaps with the extended line in the circular frame center of circle of aboveground support 1, balance when holding means entirety uses, it is ensured that the accuracy rate of the testing for electrical equipment that device carries.
Above in conjunction with accompanying drawing, the present invention is exemplarily described; obviously the present invention implements and is not subject to the restrictions described above; if the improvement of the various unsubstantialities that the method design that have employed the present invention is carried out with technical scheme; or the most improved design by the present invention and technical scheme directly apply to other occasion, all within protection scope of the present invention.
Claims (9)
1. gas pressure, gas flow and an in-situ stress monitoring device, its feature in coal seam
It is: include that data collecting instrument and the Gas explosion burns sensor being connected with gas pipe and crustal stress pass
Sensor, this Gas explosion burns sensor, crustal stress sensor are respectively by data transmission link and number
Connect according to Acquisition Instrument；Described Gas explosion burns sensor includes gas pressure sensor, Gas-Flow
Quantity sensor, gas pressure sensor and gas flow sensor respectively with the of gas pipe one end
One threeway connects, and junction arranges hydraulic quick coupler, gas flow sensor and the company of the first threeway
Connecing end and be additionally provided with valve, the other end of gas flow sensor is additionally provided with escape pipe, gas
Pipe uses breathable fabric parcel away from one end of the first threeway, and gas pipe is away from the pipe of the first threeway
At wall with breathable fabric be wound around, the size of the cross section of wound section close to the cross section of instrument connection,
Gas pipe is positioned at the one or three middle part passing to tube wall wound section and is provided with fixed substance, described ventilative
Fabric is cotton gauze；Described fixed substance is cotton gauze.
2. according to gas pressure, gas flow and crustal stress in the coal seam described in claim 1
Monitoring device, it is characterised in that: described crustal stress sensor includes instrument connection pressure cushion, height
Pressuring oil pipe, electronic digital display hydrostatic sensor and high-pressure oil pump, instrument connection pressure cushion and high-pressure oil pipe
One end connect, the second threeway that the other end of high-pressure oil pipe is had by system and electronic digital display
Hydrostatic sensor is connected, and the other end of this second threeway is connected with high-pressure oil pump by pipeline.
3. according to gas pressure, gas flow and crustal stress in the coal seam described in claim 2
Monitoring device, it is characterised in that: described instrument connection pressure cushion outer wall is additionally provided with inclusion enclave.
4. according to gas pressure, gas flow and crustal stress in the coal seam described in claim 2
Monitoring device, it is characterised in that: the junction of described instrument connection pressure cushion and high-pressure oil pipe,
The company of the other end of high-pressure oil pipe and the junction of the second threeway and the second threeway and high-pressure oil pump
The place of connecing all is connected by hydraulic quick coupler；On the pipeline that described second threeway is connected with high-pressure oil pump also
It is provided with valve；Fixed substance that described high-pressure oil pipe is arranged by gas pipe tube wall and gas pipe
Binding is fixing.
5. according to gas pressure, gas flow and ground in the coal seam described in claim 1 or 2
Monitor for stress, it is characterised in that: described data collecting instrument includes A/D change-over circuit
And CPU processor, A/D change-over circuit is connected with CPU processor, and CPU processor divides
It is not connected to program storage, display, data storage, RS232 communicating circuit, operated key
Dish and standard signal output interface.
Gas pressure in monitoring device that 6. one kind uses described in claim 1 monitoring coal seam,
Gas flow and the method for crustal stress, comprise the steps:
(1) in working face drilling testing hole；
(2) placing gas pipe, one end of gas pipe breathable fabric wraps up, and gas pipe is near hole
Outer wall breathable fabric in bottom is wound around, and the cross section of the thickness of wound section is close to the horizontal stroke of instrument connection
Cross section；
(3) it is connected with one end of high-pressure oil pipe after instrument connection pressure cushion outer wall being wrapped up, high-pressure oil pipe
After binding is fixing in the middle part of gas pipe, instrument connection pressure cushion one end is stretched in instrument connection, and will survey
Prospect hole pressure cushion is sent at the bottom of hole；
(4) hydraulic oil flows into high-pressure oil pipe by high-pressure oil pump, the second threeway, is then injected into surveying
Prospect hole pressure cushion makes it expand at the bottom of blind hole；
(5) closed test hole, then by gas pressure sensor and gas flow sensor respectively with
Gas pipe connects；
(6) turn-on data Acquisition Instrument, by gas pressure sensor and electronic digital display hydraulic sensing
Gas pressure in device sensing instrument connection and stress of coal seam, gather gas pressure through data collecting instrument
With stress of coal seam data, by display displaying data in real-time and by data storage, data are stored；
(7) gathering gas flow data, by gas pipe firedamp drainage gas, methane gas leads to
Crossing the flow of gas flow sensor sensing gas, data collecting instrument gathers gas flow, gas
Pressure, stress of coal seam, data are also stored by display displaying data in real-time by data storage.
7. according to gas pressure, gas in the monitoring device monitoring coal seam described in claim 6
Flow and the method for crustal stress, it is characterised in that: the minimum measured value of described gas flow is
0.05L/min。
8. according to gas pressure, gas in the monitoring device monitoring coal seam described in claim 6
Flow and the method for crustal stress, it is characterised in that: described instrument connection is provided under working face
Side on crossheading, instrument connection tilts the elevation angle of 5～10 °, and the degree of depth of instrument connection is 30～50m.
9. according to gas pressure, gas in the monitoring device monitoring coal seam described in claim 6
Flow and the method for crustal stress, it is characterised in that: the method in described closed test hole is test
Hole arranges Grouting Pipe, then slip casting in instrument connection, and grouting amount is that gas pipe is tied with high-pressure oil pipe
The breathable fabric tying up bearing's parcel stops stopping during flowing water, and the slurries injected in instrument connection include gathering
Urethane, cement mortar.
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| CN114370263B (en) * | 2021-12-01 | 2023-07-25 | 煤炭科学技术研究院有限公司 | Method for measuring physical and mechanical parameters and stress states of underground coal and rock mass while drilling of coal mine |
| CN114165287A (en) * | 2021-12-10 | 2022-03-11 | 黑龙江科技大学 | Coal mine dynamic disaster multi-factor coupling monitoring device, system and method |
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| CN101514926B (en) * | 2009-03-20 | 2010-12-29 | 中国矿业大学 | Coal-rock mass ground stress continuous testing device and method thereof |
| CN102230375B (en) * | 2011-06-10 | 2014-05-14 | 中国矿业大学 | Method for monitoring coal bed gas parameter in real time |
| CN202204808U (en) * | 2011-08-25 | 2012-04-25 | 安徽理工大学 | Solid coupling parameter tester for coal gas containing mashgas |
| US9176250B2 (en) * | 2011-09-29 | 2015-11-03 | Schlumberger Technology Corporation | Estimation of depletion or injection induced reservoir stresses using time-lapse sonic data in cased holes |
| CN103206996B (en) * | 2013-04-18 | 2015-04-01 | 河南理工大学 | Pore wall gas flow measuring device and pore wall gas flow measuring method |
| CN203772304U (en) * | 2013-12-11 | 2014-08-13 | 安徽理工大学 | Integral monitoring device for gas pressure, gas flow and mining induced stress in coal seam |
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