A kind of mining online pressure tester based on optical fiberTechnical field
The present invention relates to a kind of online pressure tester, particularly relate to a kind of mining online pressure tester based on optical fiber.
Background technology
Coal-bed gas pressure is research coal seam coal gas dynamics and the basic parameter gushed out, is also one of the power of coal and gas prominent.The size of coal-bed gas pressure determines number, the height of Gas Flow power and the gas potential size of mash gas dynamic phenomenon of coal seam gas-bearing capacity.The measure of preventing and treating gas effectively and reasonably formulated by mine by Accurate Determining gas pressure, it was predicted that forecast coal and gas prominent is dangerous, and rational outburst prevention measures etc. is respectively provided with highly important meaning.
Existing manometric technique typically utilizes gas pressure measurement external member to carry out drilling and sealing, installs Pressure gauge and manually reads, then parameter is uploaded to colliery system, system integration degree is the highest, and measurement error is big, and the data update cycle is long, cost of labor is high, enterprise operation burden weight.Being additionally, since real-time, parallel and automatic monitoring degree is the highest, lack the monitoring technology of distance, artificial reading error is big, and the digital independent update cycle is long, causes gas control effect unsatisfactory.
Summary of the invention
It is an object of the invention to solve problem present in current techniques, it is provided that a kind of mining online pressure tester based on optical fiber.
For reaching above-mentioned purpose, the technology used in the present invention means are: a kind of mining online pressure tester based on optical fiber, including the ground gas monitoring host computer being sequentially connected with, down-hole industry looped network, the some base station exchange machines being connected on down-hole industry looped network, the fiber Bragg grating (FBG) demodulator being connected with base station exchange machine, the some fiber bragg grating osmometers being connected on fiber Bragg grating (FBG) demodulator by transmission cable, the gas pressure signal of mensuration is sent to fiber Bragg grating (FBG) demodulator and is demodulated by fiber bragg grating osmometer, then by base station exchange machine, down-hole industry looped network is sent to ground gas monitoring host computer, coal-bed gas pressure is carried out real time on-line monitoring monitoring.
Further, the collection data that down-hole industry looped network is reported by described ground gas monitoring host computer are analyzed, store, show, and provide data to derive.
Further, the installation method of described fiber bragg grating osmometer is: beat pressure tap, then insert pressure-measuring pipe, screen casing is installed on pressure measurement tube head, injection hole sealing, sealing of hole need to reserve pressure measuring chamber bottom hole, and screen casing is positioned at pressure measuring chamber, front end, hole is arranged in pressure-measuring pipe with pore-sealing liquid sealing of hole, fiber bragg grating osmometer.
Further, described pressure tap gos deep in coal seam, and pressure measuring chamber is positioned in coal seam, and sealed borehole length is not less than 20m, pore-sealing liquid sealing length 3m.
Further, described injection hole sealing uses grouting pump, Grouting Pipe and cement mortar injection hole sealing.
Further, fiber bragg grating osmometer that described fiber Bragg grating (FBG) demodulator will be located in being connected under it by transmission cable is cascaded.
Further, described fiber bragg grating osmometer range 0～10000kPa；Fiber Bragg grating (FBG) demodulator demodulation wave-length coverage 1525～1565nm.
The beneficial effects of the present invention is: use optical signal transmission, there is not charged, essential safety, reliability height, without the impact of other gas cross, not by advantages such as electromagnetic interference, high temperature resistant, corrosion-resistant, volume is little, highly sensitive and long time stabilities, meet coal mine downhole safety requirement, stop potential safety hazard from source；Optical signal is transmitted by transmission cable, osmometer signal is demodulated by fiber Bragg grating (FBG) demodulator, and each passage can be connected multiple osmometer simultaneously, accesses down-hole industry looped network, transmission is to ground monitoring main frame, it is achieved that fast and effeciently monitor coal-bed gas pressure real time on-line monitoring；Using fiber bragg grating osmometer, range is big, and size is little, corrosion-resistant, and long-time stability are good；The data of fiber Bragg grating (FBG) demodulator precise acquisition fiber bragg grating osmometer, and on ground gas monitoring host computer, carry out data analysis, store and show, simple to operate, fast response time, Monitoring Data can derive, and measuring for Gas explosion burns provides parameter support.
Accompanying drawing explanation
The present invention is further elaborated with embodiment below in conjunction with the accompanying drawings.
The structural representation of Fig. 1: the present invention；
The mounting structure schematic diagram of Fig. 2: fiber bragg grating osmometer of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of mining online pressure tester based on optical fiber, including the ground gas monitoring host computer being sequentially connected with, down-hole industry looped network, the some base station exchange machines being connected on down-hole industry looped network, the fiber Bragg grating (FBG) demodulator being connected with base station exchange agent, the some fiber bragg grating osmometers being connected on fiber Bragg grating (FBG) demodulator by transmission cable, the gas pressure signal of mensuration is sent to fiber Bragg grating (FBG) demodulator and is demodulated by fiber bragg grating osmometer, then by base station exchange machine, down-hole industry looped network is sent to ground gas monitoring host computer and coal-bed gas pressure is carried out real time on-line monitoring monitoring.
The collection data that down-hole industry looped network is reported by described ground gas monitoring host computer are analyzed, store, show, and provide data to derive, thus realize this system real time on-line monitoring, can show the parameters such as multiple real time data and relevant position simultaneously.
As shown in Figure 2, the installation method of described fiber bragg grating osmometer is: beat pressure tap, then insert pressure-measuring pipe, installing screen casing, injection hole sealing on pressure measurement tube head, sealing of hole need to reserve pressure measuring chamber bottom hole, screen casing is positioned at pressure measuring chamber, front end, hole is with pore-sealing liquid sealing of hole, and fiber bragg grating osmometer is arranged in pressure-measuring pipe, reserves pressure head nut with pressure-measuring pipe rear end and is connected.
Described pressure tap gos deep in coal seam, and pressure measuring chamber is positioned in coal seam, and sealed borehole length is not less than 20m, and drilling and sealing is a length of away from seeing coal point 100cm, pore-sealing liquid sealing length 3m.Pressure-measuring pipe front end is positioned at pressure measuring chamber ability pressure measurement, and pressure measuring chamber is drilling and sealing front end headspace.
Described injection hole sealing uses grouting pump, Grouting Pipe and cement mortar injection hole sealing.
Described fiber Bragg grating (FBG) demodulator will be located in its lower fiber bragg grating osmometer connected by transmission cable and is cascaded.Fiber Bragg grating (FBG) demodulator demodulation wave-length coverage 1525～1565nm, port number 4, wavelength resolution is 1pm, demodulation rate is 1Hz, optical interface type FC/APC, and communication interface is USB, RS232/ Ethernet, operating temperature-10 ~ 50 DEG C, working relative humidity 0～80%(is without condensation).
Described fiber bragg grating osmometer range 0～10000kPa；Fiber Bragg grating (FBG) demodulator demodulation wave-length coverage 1525～1565nm.Fiber bragg grating osmometer range 0～10000kPa, resolving accuracy is 1 ‰ F.S., raster center wavelength 1510-1590nm, reflectance >=90%, and connected mode is welding or FC/APC grafting, and mounting means is that screw thread docks pressure-measuring pipe.
The each passage of fiber Bragg grating (FBG) demodulator can be connected multiple sensor, is cascaded by fiber bragg grating osmometer by transmission cable, it is achieved quasi-distributed monitoring.With according to pressure measuring drill hole parameter, formulating sealing of hole prediction scheme, sealing of hole material requested equipment is Pneumatic grouting pump, mining hole packer, pressure measurement external member and sealing material simultaneously, and follow-up sealing of hole flow process carries out injection hole sealing construction, completes drilling and sealing.
The fiber bragg grating osmometer of the present invention uses high-pressure type, it is adaptable to the lower interstitial hydraulic pressure in highland, oil-air pressure and gas pressure measurement, has wide range, compact size, the plurality of advantages such as corrosion-resistant, long-time stability are good, essential safety；It is transmitted optical signal by transmission cable；Osmometer signal is demodulated by fiber Bragg grating (FBG) demodulator, and each passage of (FBG) demodulator can be connected multiple sensor simultaneously, fast and effeciently coal-bed gas pressure is carried out real time on-line monitoring monitoring by ground gas monitoring host computer.Utilize optical fiber sensing technology, use optical fibers as senser element or transmission signal vector, there is not charged, essential safety, reliability height, without the impact of other gas cross, not by advantages such as electromagnetic interference, high temperature resistant, corrosion-resistant, volume is little, highly sensitive and long time stabilities, by fiber Bragg grating (FBG) demodulator precise measuring fibre grating pressure sensor reflection wavelength, integrate data acquisition, analyze, store and show function, have simple to operate, the advantages such as corresponding speed is fast, carry out multiple spot real time on-line monitoring to by measuring pressure.
Compared with prior art, the invention have the advantages that 1) optical signal transmission, electromagnetism interference essential safety, stop potential safety hazard from source；2) osmometer has wide range, compact size, and corrosion-resistant, long-time stability are good；3) (FBG) demodulator can demodulate many boring pressures parameter, good reliability simultaneously；4) accessing down-hole industry looped network, transmission is to ground monitoring main frame, real time on-line monitoring；5) technique is simple, easy to operate, improves work efficiency；6) Monitoring Data can derive, and measuring for Gas explosion burns provides parameter support.
Application embodiment is only intended to technical characteristic disclosed in the present application is described, those skilled in the art, by simply replacing the change carried out, still fall within the scope that the application is protected.