CN103644940A - Coal seam gas pressure, gas flow and crustal stress monitoring device and monitoring method - Google Patents
Coal seam gas pressure, gas flow and crustal stress monitoring device and monitoring method Download PDFInfo
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- CN103644940A CN103644940A CN201310675975.XA CN201310675975A CN103644940A CN 103644940 A CN103644940 A CN 103644940A CN 201310675975 A CN201310675975 A CN 201310675975A CN 103644940 A CN103644940 A CN 103644940A
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Abstract
The invention discloses a coal seam gas pressure, gas flow and crustal stress monitoring device. The monitoring device comprises a data acquisition instrument and a gas parameter sensor and a crustal stress sensor which are connected with a gas-transmission pipe, wherein the gas parameter sensor and the crustal stress sensor are respectively connected with the data acquisition instrument through a data transmission line. The invention further discloses a method for monitoring coal seam gas pressure, gas flow and crustal stress by use of the monitoring device. By adopting the technical scheme provided by the invention, the coal seam gas pressure, the gas flow and the crustal stress can be simultaneously monitored at the time when the crustal stress is monitored.
Description
Technical field
The invention belongs to coal mining detection field, more particularly, the present invention relates to gas pressure in a kind of coal seam, gas flow and terrestrial stress monitoring device and use the monitoring method of above-mentioned monitoring device.
Background technology
In coal seam, the occurrence status of gas is the key factor that affects production safety in coal seam, continuous increase along with the seam mining degree of depth, coal seam gas-bearing capacity increases gradually, simultaneously owing to being subject to the impact of seam mining, original terrestrial stress and mining-induced stress are concentrated, gas permeability of coal seam occurs sharply to change, and causes sharply gushing out of gas even to occur the disasters such as gas such as Gas Outburst; Practice shows, the various ANOMALOUS VARIATIONS of gas parameter are the omen of Gas Disaster normally, and gas pressure, gas flow and terrestrial stress are the key factors that causes that gas parameter changes, therefore to coal seam, be subject to gas pressure, flow and coal seam terrestrial stress rule under mining influence to carry out Validity Test significant.
When prior art detects in coal seam gas pressure, gas flow, cannot monitor terrestrial stress, coal mining is difficult to avoid the generation of the Gas Disaster that causes not in time because of detection simultaneously.
Summary of the invention
Technical matters to be solved by this invention is to provide gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of terrestrial stress being monitored simultaneously when detecting gas pressure in coal seam, gas flow.
To achieve these goals, the technical scheme that the present invention takes is: gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam providing, comprise data collecting instrument and the gas parameter sensors being connected with gas pipe and terrestrial stress sensor, this gas parameter sensors, terrestrial stress sensor are connected with data collecting instrument by data transmission link respectively.
Gas pressure in a kind of coal seam provided by the invention, gas flow and terrestrial stress monitoring device, gas parameter sensors comprises gas pressure sensor, gas flow sensor, gas pressure sensor is connected with first threeway of gas pipe one end respectively with gas flow sensor, junction arranges hydraulic quick coupler, the link of gas flow sensor and the first threeway is also provided with valve, the other end of gas flow sensor is also provided with escape pipe, gas pipe is used breathable fabric parcel away from one end of the first threeway, gas pipe is wound around with breathable fabric away from the tube wall place of the first threeway, the size that is wound around the xsect of part approaches the xsect of instrument connection, gas pipe is positioned at the one or three middle part that passes to tube wall winding part and is provided with fixed substance, preferred breathable fabric is cotton gauze, preferred fixed substance is cotton gauze.
Gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam provided by the invention, terrestrial stress sensor comprises that instrument connection pressure cushion, terrestrial stress sensor comprise instrument connection pressure cushion, high-pressure oil pipe, electronic digital display hydraulic pressure transducer 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 has by system is connected with electronic digital display hydraulic pressure transducer, and the other end of this second threeway is connected with high-pressure oil pump by pipeline.
Gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam provided by the invention, instrument connection pressure cushion outer wall is also provided with inclusion; Preferred inclusion is that the metal material with elasticity and creep-resistant property is made.
Gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam provided by the invention, instrument connection pressure cushion with the junction of high-pressure oil pipe, the junction of the other end of high-pressure oil pipe and the second threeway and the second threeway with all by hydraulic quick coupler, be connected with the junction of high-pressure oil pump; On the pipeline that described the second threeway is connected with high-pressure oil pump, be also provided with valve; The fixed substance that described high-pressure oil pipe arranges by gas pipe tube wall and gas pipe binding are fixing, the preferred cotton gauze of fixed substance.
Gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam provided by the invention, data collecting instrument comprises A/D change-over circuit and CPU processor, A/D change-over circuit is connected with CPU processor, and CPU processor is connected to respectively program storage, display, data-carrier store, RS232 communicating circuit, operation keyboard and standard signal output interface.
A method of using gas pressure, gas flow and terrestrial stress in above-mentioned monitoring device monitoring coal seam, comprises the steps:
(1) in workplace drilling testing hole;
(2) place gas pipe, wrap up with breathable fabric one end of gas pipe, and gas pipe is wound around with breathable fabric near bottom, hole outer wall, and the xsect that is wound around the thickness of part approaches the xsect of instrument connection;
(3) will after instrument connection pressure cushion outer wall parcel, be connected with one end of high-pressure oil pipe, after high-pressure oil pipe and the binding of gas pipe middle part are fixing, instrument connection pressure cushion one end is stretched in instrument connection, and at the bottom of instrument connection pressure cushion is sent to hole;
(4) hydraulic oil flows into high-pressure oil pipe by high-pressure oil pump, the second threeway, at the bottom of then injecting instrument connection pressure cushion and making its expansion blind hole;
(5) closed test hole, is then connected with gas flow sensor gas pressure sensor with gas pipe;
(6) turn-on data Acquisition Instrument, by gas pressure and stress of coal seam in gas pressure sensor and electronic digital display hydraulic pressure transducer induction instrument connection, through data collecting instrument, gather gas pressure and stress of coal seam data, by display, show in real time data and by data-carrier store, data stored;
(7) gather gas flow data, by gas pipe firedamp drainage gas, methane gas is by the flow of gas flow sensor sensing gas, and data collecting instrument gathers gas flow, gas pressure, stress of coal seam, and display shows in real time data and by data-carrier store, data stored.
The method of gas pressure, gas flow and terrestrial stress in monitoring device monitoring provided by the invention coal seam, the minimum measured value of gas flow is 0.05L/min.
The method of gas pressure, gas flow and terrestrial stress in monitoring device provided by the invention monitoring coal seam, instrument connection is arranged on to be helped on crossheading under workplace, the elevation angle that instrument connection inclination is 5～10 °, the degree of depth of instrument connection is 30～50m.
The method of gas pressure, gas flow and terrestrial stress in monitoring device monitoring provided by the invention coal seam, the method in closed test hole is that instrument connection arranges Grouting Pipe, then to instrument connection slip casting, grouting amount be the breathable fabric of gas pipe and high-pressure oil pipe binding bearing parcel while stopping flowing water only, the slurries that inject in instrument connection comprise polyurethane, sand-cement slurry.
Adopt gas pressure in a kind of coal seam provided by the present invention, gas flow and terrestrial stress monitoring device, comprise data collecting instrument and the gas parameter sensors being connected with gas pipe and terrestrial stress sensor, this gas parameter sensors, terrestrial 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, the method of gas flow and terrestrial stress, adopt device disclosed by the invention, by by gas pressure sensor, gas flow sensor and terrestrial stress sensor three organically combine, make coal-bed gas pressure, the measurement of flow and terrestrial stress can synchronously be carried out, work operation and workload have been reduced, the data of being correlated with by data collecting instrument collection, and couple together with existing Coalmine Safety Supervision system substation, not only can to relevant data, carry out real-time monitoring and storage by display and data-carrier store, also can be by real-time data transmission in each terminal computer on ground, again can Real-Time Monitoring gas pressure, flow, the dynamic change of terrestrial stress data, use polyurethane and sand-cement slurry sealing of hole simultaneously, make the closure of instrument connection better.
Below with reference to drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Below the expressed content of each width accompanying drawing of this instructions and the mark in figure are briefly described:
Fig. 1 is the schematic diagram of gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of the present invention;
Fig. 2 is the scheme of installation of gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of the present invention;
Fig. 3 is the floor map of the instrument connection shown in gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of the present invention;
Fig. 4 is the data collecting instrument theory diagram shown in gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of the present invention;
Fig. 5 is gas pressure in a kind of coal seam of the present invention, gas flow and terrestrial stress monitoring device method flow diagram.
In figure, be labeled as: 1, instrument connection, 2, hydraulic quick coupler, 3, fixed substance, 4, high-pressure oil pipe, 5, gas pipe, 6, be wound around part, 7, breathable fabric, 8, instrument connection pressure cushion, 9, inclusion, 10, Grouting Pipe, 11, electronic digital display hydraulic pressure transducer, 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-carrier store, 26, RS232 communicating circuit, 27, operation keyboard, 28, standard signal output interface, 29, power supply, 30, monitoring system substation, 31, lower crossheading, 32, the first threeway, 33, hydraulic quick coupler, 34, the second threeway, 35, hydraulic quick coupler, 36, hydraulic quick coupler, 37, hydraulic quick coupler, 38, hydraulic quick coupler, 39, hydraulic quick coupler, 40, sand-cement slurry, 41, valve.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, to the specific embodiment of the present invention as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and principle of work, manufacturing process and operation using method etc., be described in further detail, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technical scheme.
Fig. 1 is gas pressure in a kind of coal seam of the present invention, the schematic diagram of gas flow and terrestrial stress monitoring device, Fig. 2 is gas pressure in a kind of coal seam of the present invention, the scheme of installation of gas flow and terrestrial stress monitoring device, Fig. 3 is gas pressure in a kind of coal seam of the present invention, the floor map of the instrument connection shown in gas flow and terrestrial stress monitoring device, the present invention is as shown in the figure gas pressure in a kind of coal seam, gas flow and terrestrial stress monitoring device, comprise data collecting instrument and the gas parameter sensors being connected with gas pipe and terrestrial stress sensor, this gas parameter sensors, terrestrial stress sensor is connected with data collecting instrument 20 by data transmission link 16 respectively, gas parameter sensors comprises gas pressure sensor 12, gas flow sensor 15, gas pressure sensor 12 is connected with first threeway 32 of gas pipe 5 one end respectively with gas flow sensor 15, junction arranges hydraulic quick coupler 2, 35, 36, the link of gas flow sensor 15 and the first threeway 32 is also provided with valve 14, the other end of gas flow sensor 15 is also provided with escape pipe 18, gas pipe 5 is used breathable fabric 7 parcels away from one end of the first threeway 32, gas pipe 5 is wound around with breathable fabric away from the tube wall place of the first threeway 32, the size that is wound around the xsect of part 6 approaches the xsect of instrument connection, gas pipe 5 is positioned at the first threeway 32 to the middle part that tube wall is wound around part 6 and is provided with fixed substance 3, preferred breathable fabric is cotton gauze, preferred fixed substance 3 is cotton gauze, the size that is wound around the xsect of part 6 approaches the xsect of instrument connection, prevent the sand-cement slurry overflow injected and the mouth of pipe of gas pipe to blocking, cause the gas in instrument connection 1 can not pass through gas pipe, adopt cotton gauze as being wound around part, in the time of can guaranteeing that this part is sent in instrument connection 1, both having guaranteed to touch hole wall has certain toughness, avoids injuring gas pipe 5, guarantees to be again wound around part 6 and instrument connection 1 hole wall laminating.
Terrestrial stress sensor comprises instrument connection pressure cushion 8, high-pressure oil pipe 4, electronic digital display hydraulic pressure transducer 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 has by system is connected with electronic digital display hydraulic pressure transducer 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 walls are also provided with inclusion 9; Inclusion 9 is that the metal material with elasticity and creep-resistant property is made; Instrument connection pressure cushion 8 with the junction of high-pressure oil pipe 4, the other end of high-pressure oil pipe 4 all by hydraulic quick coupler 37,38,39, be connected with the junction with high-pressure oil pump 19 with junction and second threeway 34 of the second threeway 34; On the pipeline that the second threeway 34 is connected with high-pressure oil pump 19, be also provided with valve 41; The fixed substance 3 that high-pressure oil pipe 4 arranges by gas pipe 5 tube walls is fixing with gas pipe 5 bindings, the preferred cotton gauze of fixed substance 3; The diameter of inclusion 9 is greater than the diameter of instrument connection pressure cushion but is slightly less than the diameter of instrument connection 1, in instrument connection pressure cushion after injection liquid force feed, rising along with oil pressure, inclusion 9 can expand thereupon, and then reach the effect of being close to instrument connection 1 wall, the existing good toughness of cotton gauze, has guaranteed again the firmness being wound around, and also has very strong water permeability.
Fig. 4 is the data collecting instrument theory diagram shown in gas pressure, gas flow and terrestrial stress monitoring device in a kind of coal seam of the present invention; Data collecting instrument comprises 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 respectively program storage 21, display 24, data-carrier store 25, RS232 communicating circuit 26, operation keyboard 27 and standard signal output interface 28.
Fig. 5 is gas pressure in a kind of coal seam of the present invention, gas flow and terrestrial stress monitoring device method flow diagram, and the present invention as shown in the figure uses the method for gas pressure, gas flow and terrestrial stress in above-mentioned monitoring device monitoring coal seam, comprises the steps:
(1) in workplace drilling testing hole; Instrument connection 1 is arranged on to be helped on crossheading under workplace, the tilt elevation angle of 5～10 ° of instrument connection, hole depth 30～50m; After having constructed, in hole, clean out;
(2) with cotton gauze 3, high-pressure oil pipe 4 and gas pipe 5 are bound, high-pressure oil pipe 4 and gas pipe 5 are interfixed, and allow gas pipe 5 tops and instrument connection pressure cushion 8 keep the distance of 8～10m;
(3) on the top of gas pipe 5, with cotton gauze 7, cover in order to avoid enter drilling cuttings and form obstruction;
(4) below gas pipe 5 1m place with cotton gauze around, until be wound the xsect that the size of the xsect of part 6 approaches instrument connection;
(5) by hydraulic quick coupler 33, high-pressure oil pipe 4 and instrument connection pressure cushion 8 are coupled together; Instrument connection pressure cushion 8, inclusion 9, the high-pressure oil pipe 4 being connected with instrument connection pressure cushion 8, make a gift to someone in instrument connection 1 by predetermined direction with the fixing gas pipe 5 of high-pressure oil pipe 4, and at the bottom of allowing instrument connection pressure cushion 8 arrive holes;
(6) electronic digital display hydraulic pressure transducer 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, by high-pressure oil pump 19, give 8 oilings of instrument connection pressure cushion, instrument connection pressure cushion 8 is expanded, valve-off 41 when the display of electronic digital display hydraulic pressure transducer 11 shows that pressure reaches and is stabilized in predetermined force value, removes high-pressure oil pump 19;
(7), by polyurethane 17 sealings for 1 mouthful of instrument connection, the effect of polyurethane 17 is that instrument connection 1 is carried out to preliminary shutoff is in order to prevent that sand-cement slurry 40 from flowing out from instrument connection 1 on the one hand on the one hand;
(8) owing to may having crack in coal seam, in order to allow instrument connection 1 there is better impermeability, need to carry out slip casting to instrument connection 1, during slip casting, instrument connection 1 arranges Grouting Pipe 10, by Grouting Pipe 10, sand-cement slurry 40 is injected in instrument connection 1, after sand-cement slurry 40 in instrument connection 1 arrives cotton gauze 6, because cotton gauze 6 has the solid that hinders in sand-cement slurry 40 but effect that can be permeable, rising along with water level, when water covers the top of gas pipe 5, water just can flow out along the inwall of gas pipe 5, when water flows out from the bottom of gas pipe 5, illustrate that slip casting completes, by Grouting Pipe 10 sealings,
(9) gas pressure sensor 12 and gas flow sensor 15 are installed when gas pipe 5 bottoms stop flowing water, and by data transmission link 16, gas pressure sensor 12, gas flow sensor 15 and electronic digital display hydraulic pressure transducer 11 are received respectively on data collecting instrument 20;
(10) close the valve 14 of connecting with gas flow sensor 15 orders, turn-on data Acquisition Instrument 20, by gas pressure and stress of coal seam in gas pressure sensor 12 and electronic digital display hydraulic pressure transducer 11 induction instrument connections 1, through data collecting instrument 20 Real-time Collection gas pressures and stress of coal seam data, by display 24, show in real time data and by data-carrier store 25, data stored;
(11) after prospect hole 1 internal gas pressure to be measured and stress of coal seam are stablized, the methane gas pressure data that data collecting instrument 20 gathers and stress of coal seam data are respectively methane gas pressure data and the stress of coal seam data in instrument connection 1, and now data collecting instrument 20 processes by gathered methane gas pressure data and stress of coal seam data value and stress of coal seam value the storage that obtains coal seam gas-bearing capacity automatically through software;
(12) when needs gather gas flow data, open the valve 14 of connecting with gas flow sensor 15 orders, firedamp drainage gas, by the flow of gas flow sensor 15 induction gas, data collecting instrument 20 Real-time Collection gas flows, gas pressure, stress of coal seam, display 24 shows in real time data and by data-carrier store 25, data is stored;
(13) from instrument connection 1 accomplish fluently until instrument connection 1 good by shutoff after, gas density in instrument connection 1 is to be less than gas density real in 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; While measuring gas flow, along with constantly overflowing of instrument connection 1 interior gas, gas density in instrument connection 1 is less than again real gas density in coal body gradually, when display 24 shows gas flow lower than 0.05L/min, closes the valve 14 of connecting with gas flow sensor 15 orders;
(14) with workplace, adopt by data collecting instrument 20 Real-time Collection gas pressures, gas flow and stress of coal seam data, by display 24, show in real time data and by data-carrier store 25, data stored, also can be connected with existing KJ mine safety monitor system substation by standard signal output interface 28, by real-time data transmission in ground monitoring main frame, realize Real-Time Monitoring and storage, until the advance of the face is to instrument connection 1.
Adopt gas pressure in a kind of coal seam provided by the present invention, gas flow and terrestrial stress monitoring device, comprise data collecting instrument and the gas parameter sensors being connected with gas pipe and terrestrial stress sensor, this gas parameter sensors, terrestrial 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, the method of gas flow and terrestrial stress, adopt device disclosed by the invention, by by gas pressure sensor, gas flow sensor and terrestrial stress sensor three organically combine, make coal-bed gas pressure, the measurement of flow and terrestrial stress can synchronously be carried out, work operation and workload have been reduced, the data of being correlated with by data collecting instrument collection, and couple together with existing Coalmine Safety Supervision system substation, not only can to relevant data, carry out real-time monitoring and storage by display and data-carrier store, also can be by real-time data transmission in each terminal computer on ground, again can Real-Time Monitoring gas pressure, flow, the dynamic change of terrestrial stress data, use polyurethane and sand-cement slurry sealing of hole simultaneously, make the closure of instrument connection better.
Adopt provided by the present invention a kind of based on computer-controlled inspection shaft sniffer, comprise that level is placed in the aboveground support 1 of catch pit port, the depth survey bar 2 that one end and aboveground support 1 are affixed, the other end of this depth survey bar 2 is provided with can be around the underground for probing measuring staff 3 of depth survey bar 2 rotations, during use, aboveground support 1 is placed in to the oral area of inspection shaft, depth survey bar 2 stretches into down-hole, by underground for probing measuring staff 3 portable electronic devices, situation to down-hole is very clear, having overcome prior art is manually deep into down-hole and checks on the spot and badly cause the dangerous defect occurring because of subsurface environment, improve the accuracy rate of detecting, reduced maintenance cost.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
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| CN104500140A (en) * | 2014-12-16 | 2015-04-08 | 华北科技学院 | Coal mine gas disaster multi-parameter and multipoint monitoring device |
| CN104929565A (en) * | 2014-12-18 | 2015-09-23 | 安徽恒源煤电股份有限公司 | Double-layered grouting guide pipe |
| CN105114057A (en) * | 2015-07-31 | 2015-12-02 | 中国矿业大学 | System and method for intelligently detecting sealing quality of gas drainage borehole |
| CN105241502A (en) * | 2015-10-15 | 2016-01-13 | 华北理工大学 | Gas parameter measuring device for water-containing coal seam through dynamic balance method |
| CN105806420A (en) * | 2016-05-17 | 2016-07-27 | 山东鼎安检测技术有限公司 | Device and method for measuring gas flow of drill hole of water-containing coal bed |
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| 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 |
| CN114370263A (en) * | 2021-12-01 | 2022-04-19 | 煤炭科学技术研究院有限公司 | Method for measuring physical and mechanical parameters and stress state of coal and rock mass in underground coal mine while drilling |
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