CN201857953U - Advanced abutment pressure monitoring device on coal face - Google Patents
Advanced abutment pressure monitoring device on coal face Download PDFInfo
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- CN201857953U CN201857953U CN201020586780XU CN201020586780U CN201857953U CN 201857953 U CN201857953 U CN 201857953U CN 201020586780X U CN201020586780X U CN 201020586780XU CN 201020586780 U CN201020586780 U CN 201020586780U CN 201857953 U CN201857953 U CN 201857953U
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- coal
- underground substation
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- borehole
- stress
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Abstract
The utility model discloses an advanced abutment pressure monitoring device on a coal face, which comprises a mainframe equipped with software of a KSE-III type steel chord recording system, a collecting instrument, an underground substation and borehole stress meters, wherein the borehole stress meter is arranged in a coal body, the underground substation is connected with pressure sensors of the borehole stress meters through a cable, and the mainframe performs data transmission with the underground substation through the collecting instrument. The underground substation used for monitoring advanced abutment pressure on the coal face can continuously and uninterruptedly record data change of the borehole stress meter; the simultaneous arrangement of a plurality of the borehole stress meters can realize comprehensive stress data collection of the coal body in front of the face; and a stress change curve with different distances in front of the face can be obtained by performing association analysis on data among various monitoring points.
Description
Technical field
The utility model relates to the leading bearing pressure monitoring device of a kind of coal-face, by arranging borehole stressmeter in coal-face the place ahead different distance, the STRESS VARIATION in the monitoring coal body, thereby the purpose of square bearing pressure in face of the realization monitoring.
Background technology
After exploit in the coal seam, destroy the balancing of stresses state of in situ rock mass, thereby made the stress redistribution of coal and rock inside.When the stress of redistribution has surpassed near the ultimate strength of the coal body of working face wall, make that near the coal petrography the work plane destroys, and move, up to forming new balancing of stresses state to the goaf.And in one segment distance of work plane the place ahead, can form a stress concentratedarea, the stress value of its coal body is greater than stress of primary rock state, therefore, may cause the increase of increase of roadway deformation amount and shock hazard.Therefore, grasp the Changing Pattern of the leading bearing pressure in work plane the place ahead, important role is arranged instructing safety in production.
And, adopt round-about way mostly at present at the monitoring method of work plane the place ahead bearing pressure, as observing methods such as tunnel roof to floor convergence, observation work plane the place ahead cranny development.And when adopting oil pressure pillow directly to observe now, it is insufficient and make stress value occur than mistake with the drill hole wall contact to tend to occur the oil pressure pillow.In view of the problem that exists in the above-mentioned technology, we are necessary to design the device of the higher leading bearing pressure of monitoring face of a kind of accuracy, to realize the guidance to producing.
The utility model content
The purpose of this utility model provides the leading bearing pressure monitoring device of the higher coal-face of a kind of accuracy.
To achieve these goals, the utility model is by the following technical solutions:
The leading bearing pressure monitoring device of a kind of coal-face, it comprises: main frame, Acquisition Instrument, underground substation and borehole stressmeter that KSE-III shaped steel string register system software is housed, this borehole stressmeter is arranged in the coal body, this underground substation is connected with the pressure sensor of this borehole stressmeter by cable, and this main frame carries out transfer of data by described Acquisition Instrument and this underground substation.
Pressure sensor in the described borehole stressmeter adopts pressure resistance type or capacitance type sensor.
The number of the described borehole stressmeter that connects on the described underground substation is no more than 8
The beneficial effects of the utility model: the leading bearing pressure monitoring device of the resulting coal-face of the utility model, be used for the underground substation of the leading bearing pressure of monitoring face can continuous uninterrupted the data variation of record borehole stressmeter, arrange that simultaneously a plurality of borehole stressmeters can realize that comprehensive stress in coal bed data are carried out in work plane the place ahead collects, by the data between each monitoring point are carried out association analysis, can obtain the stress changing curve of work plane the place ahead different distance.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, the leading bearing pressure monitoring device of a kind of coal-face, it comprises: main frame 1, Acquisition Instrument 2, underground substation 3 and borehole stressmeter 4 that KSE-III shaped steel string register system software is housed, borehole stressmeter 4 is arranged in the coal body, underground substation 3 is connected by the pressure sensor of cable with borehole stressmeter 4, and main frame 1 carries out transfer of data by Acquisition Instrument 2 and underground substation 3.
Acquisition Instrument 2 is to be used for the data that monitor in the underground substation 3 are transferred to main frame 1.
Underground substation 3 generally is positioned over tunnel, work plane the place ahead two and helps the place, and the monitoring node that it is provided with for the down-hole connects 8 borehole stressmeters 4 at most on each underground substation 3, and its effect is to be used for record and storage borehole stressmeter data monitored.Underground substation 3 is powered by the charging dry cell, and every charging dry cell can normally use about ten days.And have two charging dry cells, can be recycled, thereby the continuity that ensures record data can be recycled, thereby ensure the continuity of record data.
Borehole stressmeter 4 is to be placed in the coal body of work plane the place ahead, and when rock stratum extruding borehole stressmeter 4, the pressure sensor of this borehole stressmeter produces pressure signal, reaches underground substation 3 by cable and preserves.Pressure sensor in the borehole stressmeter 4 adopts pressure resistance type or capacitance type sensor.
Be wire transmission or infrared transmission between Acquisition Instrument 2 and underground substation 3, the main frame 1, the data that Acquisition Instrument 2 is gathered in the underground substation 3 are in the data importing main frame 1 that collects.
The installation site of borehole stressmeter is arranged according to face condition.Its mounting method: at first at monitoring place construction drill, hole depth is determined according to design.After drilling construction is intact, borehole stressmeter is installed as early as possible preferably, is prevented the hole of collapsing.During installation, utilize mounting rod that borehole stressmeter is headed into the hole at the bottom of, to note the hand designations on the mounting rod simultaneously, allow borehole stressmeter remain vertical direction.After arriving at the bottom of the hole, adopt hand oil pump to carry out the oiling pressurization, when pressure reaches 3 ~ 5MPa, stop to pressurize, withdraw from mounting rod, with transmission cable pressure sensor and underground substation are coupled together then.
Use Acquisition Instrument that the data of underground substation are gathered, import in the main frame then, analyze by KSE-III shaped steel string register system software, obtain the stress changing curve that each borehole stressmeter monitors, by the position of the different borehole stressmeters of key, and then obtain the distribution situation of work plane the place ahead bearing pressure.
More than be preferred embodiment of the present utility model and design graphic; above-mentioned preferred embodiment and designing graphicly only illustrates; be not to be used to limit interest field of the present utility model; all with equalization technological means or be the interest field that contained of the application's claim and the implementer does not all break away from protection domain of the present utility model.
Claims (3)
1. leading bearing pressure monitoring device of coal-face, it is characterized in that: it comprises: main frame, Acquisition Instrument, underground substation and borehole stressmeter that KSE-III shaped steel string register system software is housed, this borehole stressmeter is arranged in the coal body, this underground substation is connected with the pressure sensor of this borehole stressmeter by cable, and this main frame carries out transfer of data by described Acquisition Instrument and this underground substation.
2. the leading bearing pressure monitoring device of coal-face according to claim 1 is characterized in that: the pressure sensor in the described borehole stressmeter adopts pressure resistance type or capacitance type sensor.
3. the leading bearing pressure monitoring device of coal-face according to claim 2 is characterized in that: the number of the described borehole stressmeter that connects on the described underground substation is no more than 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020586780XU CN201857953U (en) | 2010-11-02 | 2010-11-02 | Advanced abutment pressure monitoring device on coal face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020586780XU CN201857953U (en) | 2010-11-02 | 2010-11-02 | Advanced abutment pressure monitoring device on coal face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201857953U true CN201857953U (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020586780XU Expired - Fee Related CN201857953U (en) | 2010-11-02 | 2010-11-02 | Advanced abutment pressure monitoring device on coal face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201857953U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335756A (en) * | 2013-07-08 | 2013-10-02 | 王涛 | Wireless roadway mining-induced stress monitoring device with drill bit |
| CN104265364A (en) * | 2014-07-31 | 2015-01-07 | 天地科技股份有限公司 | Monitoring determining method for working face goaf lateral coal plastic area width |
| CN105486431A (en) * | 2015-12-30 | 2016-04-13 | 山东科技大学 | Recycle type borehole stress monitoring device and monitoring method |
| CN105784221B (en) * | 2016-04-08 | 2018-08-03 | 山东科技大学 | Lead abutment pressure monitoring method based on fiber bragg grating pressure sensor |
-
2010
- 2010-11-02 CN CN201020586780XU patent/CN201857953U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335756A (en) * | 2013-07-08 | 2013-10-02 | 王涛 | Wireless roadway mining-induced stress monitoring device with drill bit |
| CN104265364A (en) * | 2014-07-31 | 2015-01-07 | 天地科技股份有限公司 | Monitoring determining method for working face goaf lateral coal plastic area width |
| CN105486431A (en) * | 2015-12-30 | 2016-04-13 | 山东科技大学 | Recycle type borehole stress monitoring device and monitoring method |
| CN105486431B (en) * | 2015-12-30 | 2017-09-29 | 山东科技大学 | A kind of recoverable drilling hole stress monitoring device and monitoring method |
| CN105784221B (en) * | 2016-04-08 | 2018-08-03 | 山东科技大学 | Lead abutment pressure monitoring method based on fiber bragg grating pressure sensor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20141102 |
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| EXPY | Termination of patent right or utility model |