CN203534738U - Borehole stressmeter with force-measuring direction thereof to be accurately controlled - Google Patents
Borehole stressmeter with force-measuring direction thereof to be accurately controlled Download PDFInfo
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- CN203534738U CN203534738U CN201320404082.7U CN201320404082U CN203534738U CN 203534738 U CN203534738 U CN 203534738U CN 201320404082 U CN201320404082 U CN 201320404082U CN 203534738 U CN203534738 U CN 203534738U
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Abstract
The utility model discloses a borehole stressmeter with the force-measuring direction thereof to be accurately controlled, which comprises a pressure measuring head and a display instrument. The pressure measuring head is vertically provided with a jacking-pressing piston, and is transversely provided with a force-applying piston. The jacking-pressing piston and the force-applying piston are respectively arranged in corresponding piston cavities and the two piston cavities are communicated with each other. The pressure measuring head is internally provided with a stress sensor and an azimuth sensor. The stress sensor is communicated with the piston cavity of the jacking-pressing piston. The stress sensor and the azimuth sensor are connected with the display instrument through signal lines. According to the technical scheme of the utility model, the azimuth sensor is additionally arranged in the pressure measuring head, so that the jacking-pressing direction of the jacking-pressing piston can be accurately controlled. Therefore, the rock burst in a mine can be accurately monitored.
Description
Technical field
The utility model relates to the sensor technical field that under monitoring coal mine, surrouding rock stress changes, the drilling hole stress sensor of the measurement STRESS VARIATION of installing at rock mass while being particularly related to deep coalmining, is specially a kind of borehole stressmeter that can show and regulate strain gauge dynamometry face direction.
Background technology
At present under coal mine, the exploitation of coal body must cause the redistribution of rock mass stress field, new Stress Field Distribution state has extremely important impact to the stability of tunnel and stope, particularly for deep mining mine, the rock burst producing because of the high concentration of stress field of the surrounding rock happens occasionally.Therefore accurately the variation of monitoring surrouding rock stress is significant safely for safeguarding stope and lane space.
Borehole stressmeter is generally arranged in the dark blind boring of Φ 42mm, and guarantee its dynamometry direction perpendicular to surface level the stress with correct measurement vertical direction.Due to hole dark (general more than 8 meters), borehole stressmeter can produce the deviation of directivity in the process of sending into installation guide rod, cause installing often out of plumb and cannot predicting of the dynamometry direction of rear borehole stressmeter and surface level, cannot correct measurement to the stress value of vertical direction.
Summary of the invention
The purpose of this utility model is just to provide a kind of borehole stressmeter that can accurately control dynamometry direction.
Its technical solution is as follows: a kind of borehole stressmeter that can accurately control dynamometry direction, comprise pressure-measuring head and Displaying Meter, on pressure-measuring head, be vertically provided with top and press piston, be horizontally arranged with application of force piston, above-mentioned top presses piston and application of force piston to be separately positioned in corresponding plunger shaft, two-piston chamber UNICOM; In pressure-measuring head, be also provided with strain gauge and azimuth sensor, strain gauge and the plunger shaft UNICOM of pushing up pressure piston, strain gauge and azimuth sensor connect with Displaying Meter by signal wire.
The utility model in use, first pressure-measuring head is inserted in blind hole, first by the angle parameter of the azimuth sensor that shows in instrument, adjust the angle of pressure-measuring head in blind hole, thereby guarantee that it is vertical direction that top presses the top of piston to press direction, then make the transverse movement of application of force piston forward, by hydraulic oil in plunger shaft, promote top and press piston top to be pressed on blind hole sidewall, and reach the original pressure value of setting, by strain gauge, can push up the pressure of pressing piston by Real-Time Monitoring.The utility model, by install azimuth sensor additional in pressure-measuring head, can accurately be controlled top and press piston top to press direction, thereby reach the object of rock burst in accurate monitoring mine.
The utility model also comprises pressure-measuring head adjustment assembly, and above-mentioned adjustment assembly comprises application of force bolt and the guide rod that can connect from beginning to end and sleeve, and sleeve set is in guide rod outside; Application of force bolt is arranged on application of force piston rear, and is threaded with pressure-measuring head by the screw thread in its outside; The rear portion of the rear portion of application of force bolt and first segment guide rod, pressure-measuring head and first sleeve are plugged to respectively one.
Above-mentioned pressure-measuring head can be sent in blind hole by above-mentioned adjustment assembly, first according to the demonstration of azimuth sensor, by sleeve, adjust pressure-measuring head and push up the top pressure direction of pressing piston, thereby it is afterburning then by rotating guide-bar, to make application of force bolt promote application of force piston.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model pressure-measuring head part.
Fig. 3 is pressure-measuring head and the draw bail schematic diagram of adjusting assembly.
Embodiment
?the following technology contents of not addressing all can adopt or use for reference prior art.
As shown in Figure 1, 2, 3, the utility model patent is mainly comprised of direction strain gauge (1), Displaying Meter (2) sleeve (3), guide rod (4), signal wire (5), and referring to Fig. 1 structural representation, sleeve and guide rod are comprised of more piece.Direction strain gauge (1) includes pressure-measuring head (6), strain gauge (7), azimuth sensor (8), application of force bolt (9), application of force piston (10), arc jacking block piston (11), referring to Fig. 2.
In the front and back of pressure-measuring head piston hole, respectively there are two oilholes (12), front oilhole connects strain gauge (7), rear oilhole connects application of force piston (10), application of force piston (10) rear portion is near application of force bolt (9) front end, application of force bolt (9) is connected with pressure-measuring head (6) by screw thread, guide rod (4) front end inserts application of force bolt (9) afterbody groove and is connected with it, referring to Fig. 3.In pressure-measuring head (6), fill with grease, when guide rod (4) clockwise rotates, application of force bolt (9) promote forward application of force piston (10) along the rear oilhole of oil cylinder move and extrusion oil cylinder in grease, force arc jacking block piston (11) move upward and fully contact with drill hole inner wall, then continue the increase of rotating guide (4) oil cylinder internal pressure.Although what direction strain gauge (1) directly bore is in-oil cylinder grease pressure, just can calculate the stress value of rock mass according to the cambered surface area of the tactile oil level area of arc jacking block piston (11) and arc jacking block piston (11).When reaching the initial stress values of regulation, rotating guide (4) no longer.
The orientation measurement of direction strain gauge (1) partly adopts angular transducer, and angular transducer adopts dedicated IC chip, and stress measurement partly adopts resistance strain type sensor.Strain gauge (7), azimuth sensor (8) pass to measurement display circuit by pressure, direction variable signal by signal wire (5) respectively.
Measure display circuit and formed by main control singlechip, strain bridge amplifying circuit, display circuit, referring to Fig. 4.Orientation angles sensor (8) is output digit signals directly, and its signal is by main control singlechip acquisition and processing; The signal of strain gauge (7) output is input to single-chip microcomputer after amplifying circuit, and single-chip microcomputer includes A/D change-over circuit, and the digital quantity after conversion obtains rock mass stress value after single-chip data is processed.Angle and stress value are indicated by display.
The length of every joint guide rod (4) and sleeve (3) is about 1.2 meters, according to the degree of depth of holing, can lengthen more piece.During use, first segment guide rod (4) is connected with application of force bolt (9) and is encased in first segment sleeve (3), the front end of sleeve (3) is inserted in into direction strain gauge (1) rear end, hand-held sleeve (3) is also pushed ahead along boring, along with direction strain gauge (1) constantly push adjunction sleeve (3) and guide rod (4), until direction strain gauge (1) is pushed to and is fathomed.The angle value of observation display, adjusts angle value according to the direction of measuring stress by rotational sleeve (3).Generally need to measure perpendicular stress, angle value will be adjusted into 0 °.
After angular setting is good, guide rod (4) is clockwise rotated, application of force bolt (9) promote forward application of force piston (10) along the rear oilhole of oil cylinder move and extrusion oil cylinder in grease, force arc jacking block piston (11) move upward and fully contact with drill hole inner wall, when reaching the initial value of regulation, the guide rod that stops the rotation (4), extract gently sleeve (3) and guide rod (4) out, Displaying Meter (2) is fixed on to rib, and borehole stressmeter installs, and starts normally to work.
It is to be noted, above-mentioned embodiment is only to exemplary illustration of the present utility model, should not be understood as restriction of the present utility model, in the specific implementation, those skilled in the art also can carry out accommodation to the utility model to the utility model as the case may be.
Claims (2)
1. the borehole stressmeter that can accurately control dynamometry direction, it is characterized in that: comprise pressure-measuring head and Displaying Meter, on pressure-measuring head, be vertically provided with top and press piston, be horizontally arranged with application of force piston, above-mentioned top presses piston and application of force piston to be separately positioned in corresponding plunger shaft, two-piston chamber UNICOM; In pressure-measuring head, be also provided with strain gauge and azimuth sensor, strain gauge and the plunger shaft UNICOM of pushing up pressure piston, strain gauge and azimuth sensor connect with Displaying Meter by signal wire.
2. a kind of borehole stressmeter that can accurately control dynamometry direction according to claim 1, is characterized in that: also comprise pressure-measuring head adjustment assembly, above-mentioned adjustment assembly comprises application of force bolt and the guide rod that can connect from beginning to end and sleeve, and sleeve set is in guide rod outside; Application of force bolt is arranged on application of force piston rear, and is threaded with pressure-measuring head by the screw thread in its outside; The rear portion of the rear portion of application of force bolt and first segment guide rod, pressure-measuring head and first sleeve are plugged to respectively one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404082.7U CN203534738U (en) | 2013-07-09 | 2013-07-09 | Borehole stressmeter with force-measuring direction thereof to be accurately controlled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404082.7U CN203534738U (en) | 2013-07-09 | 2013-07-09 | Borehole stressmeter with force-measuring direction thereof to be accurately controlled |
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| Publication Number | Publication Date |
|---|---|
| CN203534738U true CN203534738U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320404082.7U Expired - Fee Related CN203534738U (en) | 2013-07-09 | 2013-07-09 | Borehole stressmeter with force-measuring direction thereof to be accurately controlled |
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| CN (1) | CN203534738U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879120A (en) * | 2015-06-29 | 2015-09-02 | 华北理工大学 | Split type two-way dipmeter for hole drilling |
| CN108917989A (en) * | 2018-07-27 | 2018-11-30 | 中国矿业大学(北京) | A kind of rigid borehole stressmeter and operating method of stress direction auto-changing |
| CN110470419A (en) * | 2018-05-09 | 2019-11-19 | 中国科学院地理科学与资源研究所 | A kind of drilling omnidirection stress measurement device and method |
| CN110847886A (en) * | 2019-10-23 | 2020-02-28 | 北京科技大学 | Deep mine wireless drilling stress meter based on geothermal thermoelectric power generation |
-
2013
- 2013-07-09 CN CN201320404082.7U patent/CN203534738U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879120A (en) * | 2015-06-29 | 2015-09-02 | 华北理工大学 | Split type two-way dipmeter for hole drilling |
| CN110470419A (en) * | 2018-05-09 | 2019-11-19 | 中国科学院地理科学与资源研究所 | A kind of drilling omnidirection stress measurement device and method |
| CN110470419B (en) * | 2018-05-09 | 2024-01-26 | 中国科学院地理科学与资源研究所 | Drilling omnidirectional stress measuring device and method |
| CN108917989A (en) * | 2018-07-27 | 2018-11-30 | 中国矿业大学(北京) | A kind of rigid borehole stressmeter and operating method of stress direction auto-changing |
| CN108917989B (en) * | 2018-07-27 | 2024-01-26 | 中国矿业大学(北京) | Rigid drilling stress meter capable of automatically changing stress direction and operation method |
| CN110847886A (en) * | 2019-10-23 | 2020-02-28 | 北京科技大学 | Deep mine wireless drilling stress meter based on geothermal thermoelectric power generation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140409 Termination date: 20140709 |
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| EXPY | Termination of patent right or utility model |